Stainless Steel

Advantages/Features: API 5CT certification from the American Petroleum Institute, and multiple national patent certificates. Our production workshop is equipped with several highprecision CNC lathes, thread rolling machines, hydraulic pressure machines, and complete inspection instruments. Our products include oil casings, couplings, short joints, and conversion joints, covering specifications such as J55, K55, N801/Q, L80, and P110. We maintain an inventory of approximately 2,000 tons of high corrosionresistant oil casings, including 80S, 90S, 110S, and L801Cr/3Cr/13Cr, stocked yearround. We also undertake special sealing thread processing for oil well pipes and petroleum fittings, including direct connection types, trapezoidal shapes, doublestep, and variable pitch threading, as well as copper plating services. With fast delivery and high quality, we help customers reduce costs and increase efficiency. Our vision is to build an international petroleum pipeline equipment enterprise through integrity and innovation. We welcome leaders and friends from all sectors to visit and cooperate for mutual development. 1. Since 2008, we have 17 years of experience, a registered capital of 11.18 million RMB, an 8,000 m² workshop, and an annual foreign trade turnover of 20 million RMB. 2. We have import and export rights, ISO 9001 quality system certification, API 5CT certification from the American Petroleum Institute, and multiple national patent certificates. 3. Our production workshop is equipped with several highprecision CNC lathes, thread rolling machines, hydraulic pressure machines, and complete inspection instruments. 4. Our products include J55, K55, N801/Q, L80, and P110 oil casings, couplings, short joints, and conversion joints. 5. We maintain a stock of high corrosionresistant oil casings, including 80S, 90S, 110S, and L801Cr/3Cr/13Cr, with an annual inventory of around 2,000 tons. 6. We provide processing services for special sealing threads, including direct connection types, trapezoidal shapes, doublestep, and variable pitch threading, producing tens of thousands of special couplings each year. Oil Pipe Coupling Standards N80/L80 oil pipe couplings, 27/8” couplings in stock. Oil pipe coupling standards: API SPEC 5CT, API SPEC 5B, and the 11th edition of the coupling standard, BTC. Material of Oil Pipe Couplings: H40, J55, N801, N80Q, L80, P110. Specifications of Oil Pipe Couplings: Outer diameter 55.88~141.3 mm (1.9"~4 1/2"). Thread Types: Nonthickened (NUE), thickened (EUE), special clearance (SCC). Purpose of Oil Pipe Couplings: Used to connect two threaded oil pipes and has an internal threaded cylindrical body. Specifications: 4 1/2” 20” Standards: API 5CT/5B, the 11th edition of the coupling standard, BTC. Manufacturers of Oil Pipe Couplings, Extended Oil Pipe Couplings, Special Clearance Couplings. Casing Couplings: Processing thread types STC (Short Round Coupling), LTC (Long Round Coupling), BTC (Buttress Coupling). Oil Pipe Couplings: 23/8'', 27/8'', 31/2'', 41/2''; Thread types: NUE, EUE. Casing Couplings: 41/2'', 51/2'', 65/8'', 7'', 95/8'', 103/4'', 133/8'', 20''; Thread types: STC, LTC, BTC. 1. We provide coupling blanks (according to API SPEC 5CT (9th edition) requirements) with quality specifications and related certifications to ensure that the coupling blanks are produced according to API requirements. 2. Thread inspection of casing couplings according to the 11th edition of the coupling standard, BTC. 3. Thread processing for couplings, including tight distance, tooth height, pitch, taper, and other parameters, is inspected according to API Spec 5CT (9th edition) and API Spec 5B (15th edition); all dimensional and thread parameter inspections must be well documented. 4. The surface of the threads must be smooth and free of significant tearing, tool marks, abrasion marks, shoulders, or any other defects that disrupt the continuity of the threads; internal and external chamfers and starting threads must be free of burrs and other flaws. 5. The critical thickness of the coupling should be specified. 6. Internal and external edges of the coupling should be rounded, with R≥0.5 mm, and the edges on the bearing surface of the coupling should be chamfered. 7. Thread flaw detection. We sincerely look forward to your inquiries! We are dedicated to serving you!

Minimum Order: 1 bags

Product Information: Oil Casing and Tubing Short Joints 7. Industry Standards Oil casing and tubing short joints must comply with various industry standards to ensure safety and reliability. Key standards include: - API Spec 5CT: Governs the specifications for casing and tubing used in oil and gas wells. - API Spec 5B: Covers the requirements for the threads used in casing and tubing. - ISO 11960: Specifies the requirements for steel pipes for use as casing or tubing for wells. - NACE MR0175/ISO 15156: Addresses materials for use in H2S-containing environments. 8. Conclusion Oil casing and tubing short joints play a vital role in the oil and gas industry, providing essential connections in drilling and production operations. Their specifications, materials, and manufacturing processes are designed to meet the rigorous demands of the industry, ensuring reliability and safety. By facilitating flexibility and cost savings, short joints are indispensable components that contribute to the efficiency and effectiveness of oil and gas extraction. As the industry continues to evolve, the importance of high-quality short joints will remain a critical factor in successful drilling operations. Copper Plating Services: We produce tens of thousands of special couplings annually. Oilfield Connection Oil Pipe Reducers: 35CrMo. We can process various types of oil pipe couplings: Specifications: 1.941/2 Thread Types: EUE (thickened), NUE (not thickened). Short Drill Pipe Conversion Joints: Oilfield connection oil pipe reducers 35CrMo, with specifications of 1.941/2 and various thread types. Variable Coupling Conversion Joints: Double male (PIN X PIN), one male and one female (PIN X BOX). Casing Couplings: Specifications: 41/2 to 20 inches. Thread Types: STC (Short Round Coupling), LTC (Long Round Coupling), BTC (Buttress Coupling). We can also customize various couplings and joints according to drawings. Standards: API5CT, API5L, API5B. Oil Pipe Specifications: 23/8” to 41/2”, with end processing types NUE and EUE. We can also process various sizes of oil casing short joints, double male short joints, reducer short joints, and conversion joints according to orders, ranging from 2FT to 20FT. Oil Casing Specifications: 41/2” to 20”, with thread types STC, LTC, BTC, etc. Materials: H40, J55, K55, N80, L80, C90, C95, T95, P110, Q125, 13Cr80, 13Cr110, Super 13Cr, etc. We always adhere to the principle of prioritizing people before tasks, insisting on equipment and scientific management as the foundation to provide customers with highquality products. With a complete marketing network and service system, we ensure satisfactory service for our customers. We look forward to working together to create brilliance!

Minimum Order: 1 bags

1. HC110 Oil Casing Q125, 10th Edition, Oil Well Tubing, Special-Purpose Casing, C90, 90SS, L80-1 Oil casing is an essential type of pipe in the oil and natural gas drilling industry. The HC110 Oil Casing Q125, 10th Edition, as a high-end product, has become a leader in the field of special-purpose oil well casing due to its outstanding performance and wide range of applications. Product Features: - The HC110 Oil Casing Q125 is manufactured using advanced processes and complies with the API 5CT standard. It features high strength, high toughness, and corrosion resistance. - The chemical composition is strictly proportioned, with carbon content ≤0.35%, manganese content ≤1.35%, nickel content ≤0.99%, chromium content ≤1.50%, and molybdenum content ≤0.85%. These alloy elements ensure excellent performance in harsh oil drilling environments. - In terms of mechanical properties, the yield strength ranges from 862 to 1034 MPa, the tensile strength is ≥931 MPa, and the impact toughness is ≥60 J in the transverse direction and ≥100 J in the longitudinal direction at 0°C, enabling it to withstand complex stress conditions. Application Fields: - This product is widely used in the oil and natural gas drilling industry as a casing for oil wells. It can withstand complex underground pressures and geological conditions, ensuring the safety and stability of oil wells. Additionally, it can be used to manufacture tubing, casing couplings, and other petroleum drilling tools and equipment, contributing to efficient extraction operations. Product Advantages: - The manufacturing process of the HC110 Oil Casing Q125, 10th Edition, strictly controls quality. From raw material procurement to finished product inspection, every step is rigorously tested to ensure reliability and stability. Moreover, we offer customized services to meet the individual needs of different customers. Casing Connection Types: 1. LTC (Long Thread Connector): Long round thread. Although LTC threads are similar in shape to STC threads and can connect, they are generally not recommended for connection due to differences in the torque they can withstand. 2. STC (Stub (Short) Thread Connector): Short round thread. STC and LTC threads are both API standard threads, differing only in thread length. The longer one is LTC, and the shorter one is STC. For pipes with an outer diameter of 4-1/2", a thread length exceeding 3 inches is typically LTC, while less than 3 inches is STC. 3. BTC (Buttress Thread Coupling): Buttress thread. Available Casing Sizes: 4-1/2'', 5'', 5-1/2'', 6-5/8'', 7'', 7-5/8'', 8-5/8'', 9-5/8'', 10-3/4'', 11-3/4'', 13-3/8'', 16'', 18-5/8'', 20''. Steel Grades: J55, K55, N80-1, N80Q, L80-1, P110, L80-3CR, 9CR, 13CR, P110-13CR (Super 13CR), 28CR. Connection Types: Short round thread (STC), long round thread (LTC), buttress thread (BTC), and various high gas-tightness special threads. Production Process: Hot rolling. Product Usage: For oil well drilling. Packaging: Steel bands/steel frames, or as per customer requirements. Annual Supply Capacity: 300,000 tons. Quality Standards: We strictly adhere to the API Spec 5CT standard and the ISO 9001 international quality management system. We possess manufacturing equipment, including CNC lathes, CNC threaders, automatic flaw detectors, CNC hydrostatic testers, automatic marking machines, automatic painting and marking machines, 16-ton cranes, ultrasonic thickness gauges, and automatic feeding systems. Market Reach: While meeting domestic market demands, we serve numerous enterprises with high-quality products and have established long-term supplier relationships with countries and regions such as Saudi Arabia, the UAE, Sudan, Kuwait, and Turkey. Corporate Philosophy: Mission: Integrity, Pragmatism, Mutual Benefit, Win-Win. Management Philosophy: Based on humanized management and modern management practices, we are market-oriented, law-abiding, and committed to win-win cooperation with customers. Principle: We always adhere to the principle of "being a good person first, then doing good work." We insist on using advanced equipment and scientific management to provide high-quality products and a comprehensive marketing and service network to ensure customer satisfaction. 2. Blowdown Tubing, Blowdown Pipeline, Small Tubing for Gas Wells, 42.16mm Tubing, Thickened Tubing, Large-End Short Couplings, Rotary Short Couplings In the process of oil and natural gas extraction, blowdown tubing and blowdown pipelines are key equipment to ensure operational safety and efficiency. Our blowdown tubing and pipeline products, specifically designed for gas wells, are manufactured from high-quality materials and feature high strength, corrosion resistance, and excellent sealing properties. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

Product Features The blowdown tubing and blowdown pipelines are manufactured from seamless steel pipes, which offer excellent mechanical properties and corrosion resistance. The 42.16mm small tubing is designed to fit various downhole environments, while the thickened design of the small tubing enhances the strength and wear resistance of the pipe body, extending its service life. Additionally, we provide a variety of short couplings, such as largeend short couplings and rotary short couplings, to meet different connection requirements. Application Fields Blowdown tubing and blowdown pipelines are primarily used for blowdown operations in oil and natural gas wells, effectively controlling wellb pressure and preventing blowout accidents. The 42.16mm small tubing is suitable for gas well exploitation, enhancing the production efficiency of gas wells. Short couplings are used to connect tubing and casing, ensuring the sealability and stability of the pipeline system. Product Advantages Our blowdown tubing and blowdown pipeline products undergo strict quality inspection and comply with relevant standards. During the manufacturing process, we employ advanced production techniques and equipment to ensure the quality and performance of the products. Moreover, we offer comprehensive aftersales services to address any issues customers may encounter during use. Tubing Specifications: 1.05'', 1.315'', 1.66'', 1.9'', 23/8'', 2.7/8'', 31/2'', 4'', 41/2''. Steel Grades: J55, K55, N801, N80Q, L801, P110, L803CR, 9CR, 13CR, P11013CR (Super 13CR), 28CR. Connection Types: NU (Plain End), EU (Upset). Production Process: Hot rolling. Product Usage: For blowdown tubing, blowdown pipelines, small tubing for gas wells (42.16mm), thickened tubing, short couplings, largeend short couplings, rotary short couplings, oil well drilling, and various material tubing and couplings (P110SSTPCQ). Packaging: Steel bands/steel frames, or as per customer requirements. Annual Supply Capacity: 300,000 tons. Custom Processing: We can process various specifications of tubing short couplings according to customer requirements, including EU upset, double male short couplings, casing short couplings, highpressure adjustment short couplings, conversion couplings/XOver, couplings, and thread protectors. Available processing forms include PIN X PIN (double male short couplings) and PIN X BOX (finished short couplings with one male and one female end). Processing lengths range from 2 feet (ft) to 20 feet (ft); end forms available include EUE (upset) and NUE (nonupset). Quality Standards: We strictly adhere to API Spec 5CT and the ISO 9001 quality management system. We possess manufacturing equipment, including CNC lathes, CNC threaders, automatic flaw detectors, CNC hydrostatic testers, automatic marking machines, automatic painting and marking machines, 16ton cranes, ultrasonic thickness gauges, and automatic feeding systems. Market Reach: While meeting domestic market demands, we serve numerous enterprises with highquality products and have established longterm supplier relationships with countries and regions such as Saudi Arabia, the UAE, Sudan, Kuwait, and Turkey. Corporate Philosophy: Mission: Integrity, Pragmatism, Mutual Benefit, WinWin. Management Philosophy: Based on humanized management and modern management practices, we are marketoriented, lawabiding, and committed to winwin cooperation with customers. Principle: We always adhere to the principle of "being a good person first, then doing good work." We insist on using advanced equipment and scientific management to provide highquality products and a comprehensive marketing and service network to ensure customer satisfaction. We look forward to working together with you to achieve greater success! Contact:Bone Email:Bone@dlpoctg.com , Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

Double Male Short Couplings, High-Pressure Short Couplings, Tubing Thread Change Couplings, Tubing Reducing Couplings, Tubing Conversion Couplings, Oil/ Casing Threads I. Double Male Short Couplings and High-Pressure Short Couplings Product Features: Double male short couplings and high-pressure short couplings are essential connecting accessories in the oil and natural gas industry, widely used in various high-pressure and challenging downhole operations. Double male short couplings have male threads on both ends, facilitating quick connections with other pipes or equipment, and are characterized by their compact structure and reliable connection. High-pressure short couplings are specifically designed for high-pressure environments, manufactured from high-strength materials, and capable of withstanding extremely high pressures. They also feature excellent sealing performance to ensure no leakage during high-pressure operations. Application Fields: Double male short couplings and high-pressure short couplings are mainly used for pipeline connections in the drilling, extraction, and transportation processes of oil and natural gas. During drilling, they are used to connect drill pipes and other equipment to ensure smooth drilling operations. In extraction, they connect tubing and casing to ensure efficient oil and gas transmission. In transportation, they connect pipelines to ensure safe oil and gas delivery. Product Advantages: 1. High Strength and Durability: Manufactured from high-quality alloy steel, these couplings can withstand high pressure and corrosive environments. 2. Sealing Performance: Special thread designs and sealing structures ensure the tightness of the connection. 3. Multiple Specification Options: Available in various sizes and thread types to meet the personalized needs of different customers. 4. Customized Services: Customized solutions can be provided based on specific customer requirements. II. Tubing Thread Change Couplings, Tubing Reducing Couplings, and Tubing Conversion Couplings Product Features: Tubing thread change couplings, tubing reducing couplings, and tubing conversion couplings are important connecting accessories in the oil and natural gas industry, used to solve connection problems between different pipe diameters and thread types. Tubing thread change couplings can convert one type of thread to another, facilitating connections between different equipment. Tubing reducing couplings are used to connect pipes of different diameters to ensure smooth oil and gas transmission. Tubing conversion couplings are used to connect tubing with casing or other equipment, offering good compatibility and sealing performance. Application Fields: These couplings are widely used for pipeline connections in the drilling, extraction, and transportation processes of oil and natural gas. During drilling, they connect drill pipes and other equipment to ensure smooth drilling operations. In extraction, they connect tubing and casing to ensure efficient oil and gas transmission. In transportation, they connect pipelines to ensure safe oil and gas delivery. Product Advantages: 1. High Strength and Durability: Manufactured from high-quality materials, these couplings can withstand high pressure and corrosive environments. 2. Sealing Performance: Special thread designs and sealing structures ensure the tightness of the connection. 3. Multiple Specification Options: Available in various sizes and thread types to meet the personalized needs of different customers. 4. Customized Services: Customized solutions can be provided based on specific customer requirements. III. Oil/ Casing Threads Product Features: Oil/ casing threads are key connecting components in the oil and natural gas industry, and their quality and performance directly affect the safety and efficiency of oil wells. Our oil/ casing thread products are manufactured using advanced processes to ensure thread precision and strength. The thread surface is specially treated to provide excellent wear resistance and corrosion resistance. We also offer a variety of thread types, such as API standard threads and special threads, to meet different customer needs. Application Fields: Oil/ casing threads are widely used for pipeline connections in the drilling, extraction, and transportation processes of oil and natural gas. During drilling, they connect drill pipes and other equipment to ensure smooth drilling operations. In extraction, they connect tubing and casing to ensure efficient oil and gas transmission. In transportation, they connect pipelines to ensure safe oil and gas delivery. Product Advantages: 1. High Strength and Durability: Manufactured from high-quality materials, these threads can withstand high pressure and corrosive environments. 2. Sealing Performance: Special thread designs and sealing structures ensure the tightness of the connection. 3. Multiple Specification Options: Available in various sizes and thread types to meet the personalized needs of different customers. 4. Customized Services: Customized solutions can be provided based on specific customer requirements. Summary In the oil and natural gas industry, products such as double male short couplings, high-pressure short couplings, tubing thread change couplings, tubing reducing couplings, tubing conversion couplings, and oil/ casing threads are key components to ensure the safe and efficient operation of oil wells. By selecting the appropriate products and solutions, the reliability and service life of equipment can be effectively improved, providing strong support for oil extraction. Our products are manufactured using advanced processes and high- quality materials, undergo strict quality inspection, and meet relevant standards, capable of satisfying the personalized needs of different customers. We also offer professional technical support and after-sales service to address any issues customers may encounter during use. Additional Information - Oilfield Tubing Reducing Couplings 35CrMo: Available for processing in various sizes and thread types. - Tubing Couplings: Sizes range from 1.9" to 4-1/2", with thread types including EUE (upset) and NUE (non-upset). - Short Drill Pipe Conversion Couplings: Available in double male (PIN X PIN) and single male/female (PIN X BOX) configurations. - Casing Couplings: Sizes range from 4-1/2" to 20", with thread types including STC (short round thread), LTC (long round thread), and BTC (buttress thread). - Material Options: H40, J55, K55, N80, L80, C-90, C95, T95, P110, Q125, 13Cr- 80, 13Cr-110, Super 13Cr, etc. We always adhere to the principle of "being a good person first, then doing good work." We insist on using advanced equipment and scientific management to provide high-quality products. Based on a comprehensive marketing network and service system, we ensure customer satisfaction. Let's work together to achieve greater success! Contact:Bone Email:Bone@dlpoctg.com , Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

Oil Casing: An Essential Component in Oil Drilling Oil casing is an indispensable part of the oil drilling process. It plays a crucial role in supporting the wellbore and preventing collapse, while also providing a stable channel for the extraction of oil and gas. Currently, the common specifications of oil casing on the market range from 4-1/2 inches to 20 inches, which can meet the needs of wells with different depths and geological conditions. In the production of oil casing, the design of the thread type is particularly critical. The STC (Short Round) thread type, which is relatively short and round in shape, is an early widely used type. It is relatively simple in processing technology, but its strength and sealing performance are relatively weak. With the development of technology, the LTC (Long Round) thread type has gradually become mainstream. The LTC thread type has significant improvements in length and sealing performance, and can better adapt to high-pressure and high-temperature downhole environments. The BTC (Buttress Thread) is one of the most advanced thread types at present. Through its special trapezoidal design, it greatly improves the tensile and torsional strength of the casing, and also achieves a very high level of sealing performance. Different specifications and thread types of oil casing have their own advantages in practical applications. For example, 4-1/2 inch casing is usually used in shallow wells and small oil wells. Its smaller diameter can reduce drilling costs, and in some areas with better geological conditions, this specification of casing can also meet the extraction requirements. On the other hand, the extra-large 20-inch casing is mainly used for deep-sea and ultra-deep well extraction. They need to withstand huge formation pressures and complex geological conditions, so the requirements for the strength and sealing performance of the casing are extremely high. When selecting oil casing, users need to take into account a variety of factors such as the depth of the oil well, geological conditions, and extraction processes. For example, in oil wells containing corrosive gases, casings with anti-corrosion coatings need to be selected; in high-temperature and high-pressure oil wells, high-strength, high-sealing BTC thread type casings need to be selected. In addition, the material of the casing is also very important. Common materials include carbon steel, alloy steel, etc. Casings made of different materials have differences in performance and cost. In short, as one of the core equipment in oil extraction, the selection of the specification and thread type of oil casing has a crucial impact on the extraction efficiency and safety of the oil well. With the continuous progress of science and technology, the design and manufacturing technology of oil casing are also constantly innovating. In the future, more high-performance, high-reliability casing products will be introduced to the market, providing strong support for the sustainable development of the oil industry. Welcome to the Online Store of Tianjin Longkailai Petroleum Equipment Co., Ltd. Execution Standards: API-5CT, API-5L, API-5B, API 5D Company Products: Tubing couplings, tubing collars, thickened tubing couplings, flush joint tubing couplings, variable thread tubing couplings, extended tubing couplings, single-end threaded tubing couplings, internal thread tubing couplings, tubing connectors, variable thread tubing connectors, variable diameter tubing couplings, tubing conversion connectors, tubing coupling stock, tubing nipples, tubing short sections, thickened tubing nipples, tubing lifting nipples, double male tubing nipples, heavy-weight tubing nipples/short sections, lifting tubing nipples/short sections, variable thread tubing nipples/short sections, variable diameter tubing short sections/nipples, tubing conversion connectors, single-end threaded tubing nipples, coupling stock, thickened tubing, EUE thickened petroleum tubing, high-pressure tubing nipples, [casing short sections], [casing nipples], [double male casing short sections], [double male casing nipples], [casing variable thread couplings], [casing variable thread connectors], [external thread casing nipples/short sections], [casing conversion connectors], [high-pressure casing nipples], [casing thread protectors (cap)], [casing coupling stock], [finished casing products], casing couplings, coupling stock, short round thread casing couplings, long round casing couplings, tapered casing couplings, variable thread casing couplings, casing connectors, casing collars, variable diameter casing couplings, eccentric casing couplings, casing conversion connectors, API casing, single- end threaded casing couplings, coupling stock. Casing Specifications: 4-1/2”-20” with thread types such as STC (Short Round), LTC (Long Round), BTC (Trapezoidal Thread), etc. Tubing Specifications: 1.05”-4-1/2” with end processing forms NU (non-upset), EU (upset). Custom Processing: We can process couplings, nipples, variable thread connectors, etc., in various lengths and sizes according to order drawings. Processing Forms: Straight connection tubing nipples/connectors, PIN * PIN (double male nipples), PIN * BOX (one male one female finished nipples), BOX * PIN (one female one male finished nipples). Materials: H40, J55, K55, N80, L80, C-90, C95, T95, P110, Q125, 13Cr-80, 13Cr- 110, Super 13Cr, Nickel-based alloy tubing, etc. Drill Pipe Specifications: 2-3/8”-6-5/8”, etc. Thickening Forms: Internal thickening, external thickening, internal and external thickening. Custom-made products such as drill pipe variable thread connectors, drill pipe nipples, double male drill pipe nipples, and drill pipe conversion connectors in various lengths according to orders or drawings. Materials: E-75, X95, G105, S135, etc. Company Philosophy: We adhere to the management philosophy of people-oriented and customer-first. Based on advanced equipment and scientific management, we provide high-quality products for customers. With a complete marketing network and service system, we ensure satisfactory service for customers. Let's join hands to create a brilliant future!

Minimum Order: 1 bags

V. Information on Sulfide-Resistant Tubing and Tubing Short Products Product Overview Sulfide-resistant tubing is a special type of tubing designed for use in sour gas and oil wells, capable of effectively resisting the corrosive effects of hydrogen sulfide (H₂S) and other corrosive gases, thereby extending the lifespan of the tubing. Tubing shorts, which are crucial components for connecting tubing strings, directly influence the effectiveness and longevity of the tubing connections. As oil and gas extraction technologies continue to advance, the market demand for sulfide-resistant tubing and tubing shorts is steadily increasing. Material and Manufacturing Process Both sulfide-resistant tubing and tubing shorts are typically manufactured from high-strength alloy steel, known for its superior mechanical properties and corrosion resistance. During production, these steels undergo stringent heat treatment processes to ensure optimal hardness and toughness. To further enhance corrosion resistance, the surface of sulfide-resistant tubing is coated with a specialized anti-corrosion layer. In regions such as Hebei and Shandong, numerous specialized manufacturers produce these products using advanced production equipment and testing technologies to ensure the quality and performance of each item. For instance, a company in Hebei employs advanced internal coating technology to significantly boost the corrosion resistance of its sulfide-resistant tubing. Applications Sulfide-resistant tubing and tubing shorts are extensively used in the extraction and transportation of oil and natural gas. In oil and gas fields in regions like Jilin and Shanxi, where geological conditions are complex and the concentration of hydrogen sulfide in hydrocarbons is high, the application of these products is particularly critical. They not only effectively prevent corrosion of the tubing by hydrogen sulfide but also ensure the long-term stable operation of the wells, reducing the frequency of maintenance and replacements, and thereby lowering extraction costs. Market Competition and Development Trends Currently, market competition for sulfide-resistant tubing and tubing shorts primarily focuses on product quality, price, and service. Some companies in Shandong and other regions have gradually secured a market position through technological innovation and cost control. Looking ahead, with the continuous advancement of oil and gas extraction technologies, the market demand for these products will further increase. Companies will place greater emphasis on product intelligence and environmental protection, enhancing performance and reliability through the development of new materials and connection technologies. Summary As vital equipment in oil and gas extraction, sulfide-resistant tubing and tubing shorts provide strong assurance for the development of sour gas and oil wells with their excellent corrosion resistance and reliable mechanical strength. Manufacturers in regions such as Hebei and Shandong continuously innovate and control quality to supply high-quality products to the market. As market demand grows and technology advances, these products are set to play an even more significant role in future oil and gas extraction. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

IV. Information on Sucker Rod Tubing Connectors and Conversion Fittings Product Overview Sucker rod tubing connectors are essential components for linking sucker rods, directly influencing the lifespan and efficiency of the pumping process. Conversion fittings, on the other hand, are crucial for connecting pipes of different specifications and types, including those with special thread forms. These fittings are known for their convenient connection and excellent sealing performance. With the continuous development of oil and gas extraction technologies, the market demand for both sucker rod tubing connectors and conversion fittings is on the rise. Material and Manufacturing Process Both sucker rod tubing connectors and conversion fittings are typically made from high-strength alloy steel, which offers good mechanical properties and corrosion resistance. During production, these steels undergo rigorous heat treatment to ensure hardness and toughness. To enhance sealing performance, the threaded sections of these components are coated with special sealing materials. In regions such as Beijing and Qinghai, there are many specialized manufacturers of these products. These companies employ advanced production and testing technologies to ensure the quality and performance of each product. For example, a Beijing-based company produces sucker rod tubing connectors with advanced thread machining and sealing inspection equipment, ensuring reliability in high-pressure and high-temperature environments. Applications Sucker rod tubing connectors and conversion fittings are widely used in the extraction and transportation of oil and natural gas. In oil and gas fields in regions such as Qinghai, where geological conditions are complex and high sealing performance and strength are required, these components are extensively applied due to their excellent performance. Market Competition and Development Trends Currently, market competition for sucker rod tubing connectors and conversion fittings mainly focuses on product quality, price, and service. Some companies in Qinghai and other regions have gradually secured a market position through technological innovation and cost control. Looking ahead, with the continuous advancement of oil and gas extraction technologies, the market demand for these components will further increase. Companies will place greater emphasis on product intelligence and environmental protection, enhancing performance and reliability through the development of new materials and connection technologies. Summary As vital connecting components in oil and gas extraction, sucker rod tubing connectors and conversion fittings provide strong assurance for the stable operation of oil and gas wells with their reliable performance and advanced technology. Manufacturers in regions such as Beijing and Qinghai continuously innovate and control quality to supply high-quality products to the market. As market demand grows and technology advances, these components are set to play an even more significant role in future oil and gas extraction. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

III. Information on Special Connections and Gas-Tight Connections Product Overview Special connections and gas-tight connections are two common thread forms in oil pipe connections, known for their unique structures and excellent performance. They are widely used in the oil and gas industries. With the continuous development of oil and gas extraction technologies, the market demand for these connections is also increasing. Special connection threads feature high strength, high sealing performance, and good fatigue resistance, meeting the strict requirements for pipe connections in oil and gas extraction. The design of special connections typically includes complex thread shapes and special sealing structures, which effectively prevent gas and liquid leakage and ensure the safe operation of oil and gas wells. Gas- tight connections, on the other hand, focus on enhancing sealing performance through special thread shapes and sealing materials, achieving reliable sealing in high-pressure and high-temperature environments. Material and Manufacturing Process Both special and gas-tight connections are usually made from high-strength alloy steel, which offers good mechanical properties and corrosion resistance. During production, these steels undergo rigorous heat treatment to ensure hardness and toughness. To improve sealing performance, the threaded sections of these connections are coated with special sealing materials. In regions such as Jiangsu, Xinjiang, and Fujian, there are many specialized manufacturers of special and gas-tight connections. These companies use advanced production and testing technologies to ensure the quality and performance of each product. For example, a Jiangsu-based company produces special connections with advanced thread machining and sealing inspection equipment, ensuring reliability in complex environments. Applications Special and gas-tight connections are extensively used in the extraction and transportation of oil and natural gas. In oil and gas fields in regions such as Zhejiang, Gansu, and Chongqing, where geological conditions are complex and high sealing performance is required, these connections are widely applied due to their excellent sealing and high strength. Market Competition and Development Trends Currently, market competition for special and gas-tight connections mainly focuses on product quality, price, and service. Some companies in Gansu and other regions have gradually secured a market position through technological innovation and cost control. Looking ahead, with the continuous advancement of oil and gas extraction technologies, the market demand for these connections will further increase. Companies will place greater emphasis on product intelligence and environmental protection, enhancing performance and reliability through the development of new materials and connection technologies. Summary As important thread forms in oil pipe connections, special and gas-tight connections provide strong assurance for the stable operation of oil and gas wells with their excellent sealing performance and high strength. Manufacturers in regions such as Jiangsu, Xinjiang, and Fujian continuously innovate and control quality to supply high-quality products to the market. As market demand grows and technology advances, these connections are set to play an even more significant role in future oil and gas extraction. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

II. Information on Oil and Casing Connectors and Direct-Connect Tubing Products Product Overview Oil and casing connectors are crucial components for linking oil tubes and casings, directly affecting the normal operation of oil and gas wells. With the continuous development of oil and gas extraction technologies, the market demand for oil and casing connectors, sulfur-resistant tubing, direct-connect tubing, seamless tubing, and connectors in regions such as Shandong, Fujian, Guangdong, Shanxi, and Hainan is on the rise. Meanwhile, direct-connect tubing, as a novel connection method, is gaining market favor due to its unique advantages. Material and Manufacturing Process The materials for oil and casing connectors and direct-connect tubing typically consist of high-strength alloy steel, known for its excellent mechanical properties and corrosion resistance. During production, these steels undergo rigorous heat treatment to ensure hardness and toughness. To enhance sealing performance, the threaded sections of connectors and direct-connect tubing are coated with special sealing materials. In regions like Fujian, Guangdong, and Shanxi, numerous specialized manufacturers produce oil and casing connectors and direct-connect tubing. These companies employ advanced production and testing technologies to ensure the quality and performance of each product. For example, a Guangdong-based enterprise produces direct-connect tubing with advanced thread machining and sealing inspection equipment, ensuring reliability in high-pressure and high-temperature environments. Applications Oil and casing connectors and direct-connect tubing are widely used in the extraction of oil and natural gas. In offshore oil and gas fields, such as those in Hainan, the complex environment demands extremely high reliability for tubing and casing connections. Direct-connect tubing is widely applied in these areas due to its convenient connection and excellent sealing performance. Additionally, in onshore oil and gas fields, traditional oil and casing connectors still dominate, but the market share of direct-connect tubing is gradually increasing. Market Competition and Development Trends Currently, market competition for oil and casing connectors and direct-connect tubing mainly focuses on product quality, price, and service. Some enterprises in Shandong and other regions have gradually secured a market position through technological innovation and cost control. Looking ahead, with the continuous advancement of oil and gas extraction technologies, the market demand for direct-connect tubing will further increase. Companies will place greater emphasis on product intelligence and environmental protection, enhancing performance and reliability through the development of new materials and connection technologies. Summary Oil and casing connectors and direct-connect tubing, as vital connecting components in oil and gas extraction, provide strong assurance for the stable operation of oil and gas wells with their reliable performance and advanced technology. Manufacturers in regions such as Fujian, Guangdong, and Shanxi continuously innovate and control quality to supply high-quality products to the market. As market demand grows and technology advances, oil and casing connectors and direct-connect tubing are set to play an even more significant role in future oil and gas extraction. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

I. Information on Petroleum Casing and Sulfide-Resistant Casing Short Products Product Overview Petroleum casing is an essential component in oil extraction and natural gas transportation, primarily used to support the wellbore and prevent collapse while providing a stable conduit for hydrocarbon flow. Within the petroleum casing family, sulfide-resistant casing shorts are particularly notable for their unique properties and extensive applications. Material and Manufacturing Process Sulfide-resistant casing shorts are typically made from high-strength alloy steel, known for its excellent corrosion resistance and mechanical strength. During production, these steels undergo specialized heat treatment to enhance hardness and toughness. Additionally, the surface of the casing shorts is coated with a special anti-corrosion layer that effectively prevents contact between hydrogen sulfide (H₂S) and the steel, thereby extending product life. In regions like Henan, numerous professional petroleum casing manufacturers not only produce standard casings but also focus on sulfide-resistant casing shorts. For instance, a well-known Henan casing company uses advanced automated production lines to ensure the quality and performance of each sulfide- resistant casing short. These companies also have specialized testing equipment to conduct rigorous inspections, including tensile strength tests, seal integrity tests, and corrosion resistance tests, ensuring product reliability and safety in practical applications. Applications Sulfide-resis , tant casing shorts are widely used in the exploitation of sour gas and oil wells. In oil and gas fields in areas such as Jilin and Shanghai, where geological conditions are complex and hydrocarbons contain high concentrations of hydrogen sulfide, the application of sulfide-resistant casing shorts is particularly crucial. These shorts not only effectively prevent corrosion of the casing by hydrogen sulfide but also ensure the long-term stable operation of the wells, reducing the frequency of maintenance and replacements, and thereby lowering extraction costs. Market Competition and Development Trends With the increasing global demand for oil and gas resources, the development of sour gas and oil fields is also on the rise, driving the market demand for sulfide-resistant casing shorts. Currently, market competition in this field mainly focuses on product quality, price, and technical services. Emerging companies in regions such as Hebei and Shandong are gradually gaining market share through technological innovation and cost control. Future Trends Looking ahead, the development of sulfide-resistant casing shorts will place greater emphasis on environmental protection and intelligence. On one hand, companies will strive to develop more environmentally friendly anti-corrosion coatings and materials to reduce environmental impact. On the other hand, intelligent detection and monitoring systems will be applied to sulfide- resistant casing shorts. By continuously monitoring the corrosion status and operational conditions of the casings, potential issues can be identified in a timely manner to ensure the safe operation of oil and gas wells. Summary As a key piece of oil extraction equipment, sulfide-resistant casing shorts provide strong assurance for the development of sour gas and oil wells with their outstanding corrosion resistance and reliable mechanical strength. Manufacturers in regions like Henan, Jilin, and Shanghai continuously innovate and control quality to supply high-quality products to the market. With increasing market demand and ongoing technological advancements, sulfide- resistant casing shorts are poised to play an even more significant role in future oil and gas extraction. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

5. Tubing Nipples: Regular, Thickened, Lifting, Double Male, and Heavy-Wall Tubing nipples are crucial connecting components in the process of oil extraction and transportation. They are primarily used to connect tubing and ensure the stability and safety of the tubing system. Currently, there are various types of tubing nipples available on the market, including regular tubing nipples, thickened tubing nipples, lifting tubing nipples, double male tubing nipples, and heavy-wall tubing nipples. Regular tubing nipples are commonly used and can meet the basic requirements for connection and sealing in general oil well extraction. Thickened tubing nipples are enhanced versions of regular nipples, with increased tensile and torsional strength, making them suitable for high-pressure and complex downhole environments. Lifting tubing nipples are mainly used for lifting tubing and have good load-bearing capacity and stability. Double male tubing nipples have male threads on both ends, which makes connection convenient and allows for quick connections between tubing sections. Heavy-wall tubing nipples are designed for applications that require the ability to withstand greater pressure and weight, providing more stable connections. In the manufacturing process of tubing nipples, advanced materials and technologies are employed. For example, high-strength steel and special anti- corrosion coatings are used to significantly extend the service life and reliability of the nipples. Precision machining equipment and strict quality inspection ensure the dimensional accuracy and sealing performance of the nipples. In practical applications, users need to select appropriate tubing nipples based on the specific conditions of the oil well. For instance, in wells containing corrosive gases, nipples with anti-corrosion coatings should be chosen; in high-pressure oil wells, thickened tubing nipples are necessary. Additionally, the installation of tubing nipples is crucial and must be carried out strictly according to operating procedures to ensure the solidity and sealing of the connections. With the continuous development of oil extraction technology, the design and manufacturing technologies of tubing nipples are also constantly innovating. In the future, more high-performance and high-reliability tubing nipple products will be introduced to the market, providing strong support for the sustainable development of the oil industry. Welcome to the Online Store of Tianjin Longkailai Petroleum Equipment Co., Ltd. Execution Standards: API-5CT, API-5L, API-5B, API 5D Company Products: Tubing couplings, tubing collars, thickened tubing couplings, flush tubing couplings, variable thread tubing couplings, extended length tubing couplings, single-end threaded tubing couplings, internal thread tubing couplings, tubing connectors, variable thread tubing connectors, variable diameter tubing couplings, tubing conversion connectors, tubing coupling stock, tubing nipples, tubing short sections, thickened tubing nipples, tubing lifting nipples, double male tubing nipples, heavy-weight tubing nipples/short sections, lifting tubing nipples/short sections, variable thread tubing nipples/short sections, variable diameter tubing short sections/nipples, tubing conversion connectors, single-end threaded tubing nipples, coupling stock, thickened tubing, EUE thickened petroleum tubing, high-pressure tubing nipples, [casing short sections], [casing nipples], [double male casing short sections], [double male casing nipples], [casing variable thread couplings], [casing variable thread connectors], [external thread casing nipples/short sections], [casing conversion connectors], [high-pressure casing nipples], [casing thread protectors (cap)], [casing coupling stock], [finished casing products], casing couplings, coupling stock, short round thread casing couplings, long round casing couplings, tapered casing couplings, variable thread casing couplings, casing connectors, casing collars, variable diameter casing couplings, eccentric casing couplings, casing conversion connectors, API casing, single- end threaded casing couplings, coupling stock. Casing Specifications: 4-1/2”-20” with thread types such as STC (Short Round), LTC (Long Round), BTC (Trapezoidal Thread), etc. Tubing Specifications: 1.05”-4-1/2” with end processing forms NU (Non-Upset) and EU (Upset). Custom Processing: We can process couplings, nipples, variable thread connectors, etc., in various lengths and sizes according to order drawings. Processing Forms: Straight connection tubing nipples/connectors, PIN * PIN (double male nipples), PIN * BOX (male-female finished nipples), BOX * PIN (female-male finished nipples). Materials: H40, J55, K55, N80, L80, C-90, C95, T95, P110, Q125, 13Cr-80, 13Cr- 110, Super 13Cr, Nickel-based alloy tubing, etc. Drill Pipe Specifications: 2-3/8”-6-5/8”, etc. Thickening Forms: Internal thickening, external thickening, internal and external thickening. Custom-made products such as drill pipe variable thread connectors, drill pipe nipples, double male drill pipe nipples, and drill pipe conversion connectors in various lengths according to orders or drawings. Materials: E-75, X95, G105, S135, etc. Company Philosophy: We adhere to the management philosophy of people-oriented and customer-first. Based on advanced equipment and scientific management, we provide high-quality products for customers. With a complete marketing network and service system, we ensure satisfactory service for customers. Let's join hands to create a brilliant future!

Minimum Order: 1 bags

4. Tubing Couplings: Regular, Thickened, Flush, Variable Thread, and Extended Length Tubing couplings are essential components in the process of oil extraction and transportation, primarily used to connect tubing and ensure the sealing and stability of the tubing system. Currently, there are various types of tubing couplings available on the market, including regular tubing couplings, thickened tubing couplings, flush tubing couplings, variable thread tubing couplings, and extended length tubing couplings. Regular tubing couplings are commonly used and can meet the basic requirements for connection and sealing in general oil well extraction. Thickened tubing couplings are enhanced versions of regular couplings, with increased tensile and torsional strength, making them suitable for high-pressure and complex downhole environments. Flush tubing couplings feature a flat surface, which facilitates installation and reduces friction and wear during the process. Variable thread tubing couplings can be adjusted according to different tubing specifications and have good compatibility. Extended length tubing couplings are designed for situations requiring longer connection distances, providing more stable connections. In the manufacturing process of tubing couplings, advanced materials and technologies are employed. For example, high-strength steel and special anti- corrosion coatings are used to significantly extend the service life and reliability of the couplings. Precision machining equipment and strict quality inspection ensure the dimensional accuracy and sealing performance of the couplings. In practical applications, users need to select appropriate tubing couplings based on the specific conditions of the oil well. For instance, in wells containing corrosive gases, couplings with anti-corrosion coatings should be chosen; in high-pressure oil wells, thickened tubing couplings are necessary. Additionally, the installation of tubing couplings is crucial and must be carried out strictly according to operating procedures to ensure the solidity and sealing of the connections. With the continuous development of oil extraction technology, the design and manufacturing technologies of tubing couplings are also constantly innovating. In the future, more high-performance and high-reliability tubing coupling products will be introduced to the market, providing strong support for the sustainable development of the oil industry. Welcome to the Online Store of Tianjin Longkailai Petroleum Equipment Co., Ltd. Execution Standards: API-5CT, API-5L, API-5B, API 5D Company Products: Tubing couplings, tubing collars, thickened tubing couplings, flush tubing couplings, variable thread tubing couplings, extended length tubing couplings, single-end threaded tubing couplings, internal thread tubing couplings, tubing connectors, variable thread tubing connectors, variable diameter tubing couplings, tubing conversion connectors, tubing coupling stock, tubing nipples, tubing short sections, thickened tubing nipples, tubing lifting nipples, double male tubing nipples, heavy-weight tubing nipples/short sections, lifting tubing nipples/short sections, variable thread tubing nipples/short sections, variable diameter tubing short sections/nipples, tubing conversion connectors, single-end threaded tubing nipples, coupling stock, thickened tubing, EUE thickened petroleum tubing, high-pressure tubing nipples, [casing short sections], [casing nipples], [double male casing short sections], [double male casing nipples], [casing variable thread couplings], [casing variable thread connectors], [external thread casing nipples/short sections], [casing conversion connectors], [high-pressure casing nipples], [casing thread protectors (cap)], [casing coupling stock], [finished casing products], casing couplings, coupling stock, short round thread casing couplings, long round casing couplings, tapered casing couplings, variable thread casing couplings, casing connectors, casing collars, variable diameter casing couplings, eccentric casing couplings, casing conversion connectors, API casing, single- end threaded casing couplings, coupling stock. Casing Specifications: 4-1/2”-20” with thread types such as STC (Short Round), LTC (Long Round), BTC (Trapezoidal Thread), etc. Tubing Specifications: 1.05”-4-1/2” with end processing forms NU (Non-Upset) and EU (Upset). Custom Processing: We can process couplings, nipples, variable thread connectors, etc., in various lengths and sizes according to order drawings. Processing Forms: Straight connection tubing nipples/connectors, PIN * PIN (double male nipples), PIN * BOX (male-female finished nipples), BOX * PIN (female-male finished nipples). Materials: H40, J55, K55, N80, L80, C-90, C95, T95, P110, Q125, 13Cr-80, 13Cr- 110, Super 13Cr, Nickel-based alloy tubing, etc. Drill Pipe Specifications: 2-3/8”-6-5/8”, etc. Thickening Forms: Internal thickening, external thickening, internal and external thickening. Custom-made products such as drill pipe variable thread connectors, drill pipe nipples, double male drill pipe nipples, and drill pipe conversion connectors in various lengths according to orders or drawings. Materials: E-75, X95, G105, S135, etc. Company Philosophy: We adhere to the management philosophy of people-oriented and customer-first. Based on advanced equipment and scientific management, we provide high-quality products for customers. With a complete marketing network and service system, we ensure satisfactory service for customers. Let's join hands to create a brilliant future!

Minimum Order: 1 bags

3. Special Threaded Tubing Nipples/Connectors: PIN * PIN Double Male Nipples and PIN * BOX Male-Female Finished Nipples In the process of oil extraction and transportation, tubing nipples and connectors are essential components for connecting tubing. Their performance and quality directly affect the stability and safety of the tubing system. In recent years, with the continuous development of oil extraction technology, special threaded tubing nipples and connectors have gradually become mainstream products in the market. There are mainly two types of special threaded tubing nipples and connectors: PIN * PIN double male nipples and PIN * BOX male-female finished nipples. The PIN * PIN double male nipple refers to a nipple with male threads on both ends. The advantage of this type of nipple is its convenient connection, which allows for quick connections between tubing sections. The PIN * BOX male-female finished nipple, on the other hand, has one end with a male thread and the other with a female thread. The advantage of this type of nipple is its more secure connection and better sealing performance, which can effectively prevent the leakage of oil and gas. Special threaded tubing nipples and connectors are designed and manufactured using advanced technologies and processes. For example, high-strength steel and special heat treatment processes are used, which greatly increase the tensile and torsional strength of the nipples and connectors. At the same time, through precise machining equipment and strict quality inspection, the dimensional accuracy and sealing performance of the nipples and connectors are ensured. In practical applications, special threaded tubing nipples and connectors can meet the needs of different oil wells. For example, in high-pressure oil wells, high-strength PIN * BOX male-female finished nipples are required to ensure the stability and safety of the tubing system. In situations where quick connections are needed, PIN * PIN double male nipples can be used to improve work efficiency. In addition, special threaded tubing nipples and connectors have good compatibility and can be matched with tubing of different brands and specifications. This provides users with more choices and also reduces the cost of use. With the continuous development of oil extraction technology, the design and manufacturing technology of special threaded tubing nipples and connectors are also constantly innovating. In the future, more high-performance and high- reliability products will be introduced to the market, providing strong support for the sustainable development of the oil industry. Welcome to the Online Store of Tianjin Longkailai Petroleum Equipment Co., Ltd. Execution Standards: API-5CT, API-5L, API-5B, API 5D Company Products: Tubing couplings, tubing collars, thickened tubing couplings, flush joint tubing couplings, variable thread tubing couplings, extended tubing couplings, single-end threaded tubing couplings, internal thread tubing couplings, tubing connectors, variable thread tubing connectors, variable diameter tubing couplings, tubing conversion connectors, tubing coupling stock, tubing nipples, tubing short sections, thickened tubing nipples, tubing lifting nipples, double male tubing nipples, heavy-weight tubing nipples/short sections, lifting tubing nipples/short sections, variable thread tubing nipples/short sections, variable diameter tubing short sections/nipples, tubing conversion connectors, single-end threaded tubing nipples, coupling stock, thickened tubing, EUE thickened petroleum tubing, high-pressure tubing nipples, [casing short sections], [casing nipples], [double male casing short sections], [double male casing nipples], [casing variable thread couplings], [casing variable thread connectors], [external thread casing nipples/short sections], [casing conversion connectors], [high-pressure casing nipples], [casing thread protectors (cap)], [casing coupling stock], [finished casing products], casing couplings, coupling stock, short round thread casing couplings, long round casing couplings, tapered casing couplings, variable thread casing couplings, casing connectors, casing collars, variable diameter casing couplings, eccentric casing couplings, casing conversion connectors, API casing, single- end threaded casing couplings, coupling stock. Casing Specifications: 4-1/2”-20” with thread types such as STC (Short Round), LTC (Long Round), BTC (Trapezoidal Thread), etc. Tubing Specifications: 1.05”-4-1/2” with end processing forms NU (Non-Upset) and EU (Upset). Custom Processing: We can process couplings, nipples, variable thread connectors, etc., in various lengths and sizes according to order drawings. Processing Forms: Straight connection tubing nipples/connectors, PIN * PIN (double male nipples), PIN * BOX (male-female finished nipples), BOX * PIN (female-male finished nipples). Materials: H40, J55, K55, N80, L80, C-90, C95, T95, P110, Q125, 13Cr-80, 13Cr- 110, Super 13Cr, Nickel-based alloy tubing, etc. Drill Pipe Specifications: 2-3/8”-6-5/8”, etc. Thickening Forms: Internal thickening, external thickening, internal and external thickening. Custom-made products such as drill pipe variable thread connectors, drill pipe nipples, double male drill pipe nipples, and drill pipe conversion connectors in various lengths according to orders or drawings. Materials: E-75, X95, G105, S135, etc. Company Philosophy: We adhere to the management philosophy of people-oriented and customer-first. Based on advanced equipment and scientific management, we provide high-quality products for customers. With a complete marketing network and service system, we ensure satisfactory service for customers. Let's join hands to create a brilliant future!

Minimum Order: 1 bags