Iron & Steel

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

Low Carbon Steel Straight Cut Tie Wire is made from high-quality low carbon steel wire Q195 (SAE1006-1008). It undergoes surface treatments such as electric galvanization, black annealing, or PVC coating, enhancing its durability and corrosion resistance. Available in various diameters ranging from BWG6 to BWG25 (0.15mm to 5.00mm), this wire meets stringent quality standards for tensile strength (350-550N/mm²) and elongation (20%-25%). Wire Rod: Q195, Q235, SAE 1006, SAE1008, SAE1010. Raw Material: Electro Galvanized Iron Wire, Black Annealed Iron Wire, PVC Coated Iron Wire Electro galvanized iron wire Production diameter range: BWG6-BWG25 0.15mm- 5.00mm. Zinc coating: Zinc coated: 8-25g/m2 Tensile strength: 350—550N/mm2 Elongation: 20%-25%< , br>Production Process:  Characteristic: The production process we use results in electro galvanized iron wire with a bright surface and good corrosion resistance.  Applications:Our electro galvanized iron wire is ideal for use in the construction industry, manufacturing, agricultural, and horticultural industries.  Construction Industry: Used for tying reinforcement bars (rebars), securing mesh, and general construction purposes. Handicrafts: Ideal for wire art, jewelry making, and other creative projects due to its flexibility and ease of use. Daily Use: Commonly used in household tasks such as gardening, bundling, and organizing. Packing: Low Carbon Steel Straight Cut Tie Wire is typically packaged: Cartons: Each coil is individually wrapped in plastic and packed in cardboard cartons for easy handling and storage. Pallets: Larger quantities are palletized to facilitate transportation and minimize damage during shipping. These packaging options ensure the wire remains clean, organized, and protected from moisture and mechanical damage during transit and storage.

TW1061T Rebar tie wire for Max twintier rb441tying gun The TW1061T Tie Wire for Max Twintier RB441T is an exceptional product designed for efficient and hassle-free tying applications.  With a compact and durable design, this tie wire is perfectly suited for various construction and manufacturing tasks. Product Description: Model:TW1061T（Double wire） Material: Q195 Low carbon steel wire  Wire Material: Electro-galvanized tie wire, Black Annealed tie wire, Polyester coated tie wire,  Stainless Steel Tie Wire, Made from high-quality materials, the TW1061T Tie Wire ensures reliability and longevity. Its sturdy construction offers great tensile strength,  enabling it to withstand rigorous use in demanding environments. Whether you are working on a large construction site or a DIY project,  this tie wire is built to deliver outstanding performance.

The 22x22 Mesh SS304 Window Insect Screen BWG 38 is a high-quality stainless steel wire mesh designed for protection against insects while allowing excellent airflow and visibility. Made from durable SS304 material, it is resistant to corrosion, rust, and deformation, making it suitable for long-term use in various environments. The fine 22x22 mesh ensures effective insect prevention, while the BWG 38 wire diameter provides strength and stability. Commonly used in residential, commercial, and industrial settings, it is ideal for windows, doors, and ventilation systems. As a trusted supplier from China, we offer reliable quality and competitive pricing for global markets. 22*22 Mesh SS304 Window Insect Screen BWG 38 Specification: Material: Stainless steel wire304 Wire Diameter: BWG38 Hole Size: 22mesh×22mesh Width: 2', 3', 4', 5'. Length: 30', 50', 100' and so on. Standard mesh size: 2' x100', 2.5'  x100', 3' x100' , 4'  x100' , 5'  x100', 1x25M, 1.2x25M, 1.5x25M.

The 20 Mesh SS304 Window Insect Screen BWG 36 is a premium stainless steel mesh made from 304-grade material, featuring 20 openings per linear inch. Its tighter weave offers enhanced protection against smaller insects and debris while maintaining excellent airflow and visibility. With a wire gauge of BWG 36, it provides a balance of strength, flexibility, and corrosion resistance. This screen is ideal for use in residential, commercial, and industrial settings, such as windows, doors, ventilation systems, and protective enclosures, where durability and long-lasting performance are essential. 20 Mesh SS304 Window Insect Screen BWG 36 Specification: Material: Stainless steel wire304 Wire Diameter: BWG36 Hole Size: 20mesh×20mesh Width: 2', 3', 4', 5'. Length: 30', 50', 100' and so on. Standard mesh size: 2' x100', 2.5'  x100', 3' x100' , 4'  x100' , 5'  x100', 1x25M, 1.2x25M, 1.5x25M. Feature: Resistance for the rust, heat, acid, alkaline and corrosion. Fire resistance and good hardness make stainless steel screen safer. Stainless steel protects against insect bites and chemical insecticides Durability and stability. Not due to moisture or temperature changes caused by window expansion, deformation, etc. Clean, beautiful, light transmittance and good ventilation, belongs to the environment friendly products.

18 Mesh SS304 Window Insect Screen BWG 37 Description: The 18 Mesh SS304 Stainless steel window screen BWG 37 is a high-quality stainless steel screen made from 304-grade material with an 18-mesh count, meaning 18 openings per linear inch. Its fine mesh structure effectively prevents insects, debris, and pests from entering while allowing airflow and visibility. With a wire gauge of BWG 37, it offers durability and corrosion resistance, making it ideal for residential, commercial, and industrial applications. Common uses include window and door screens, ventilation systems, and protective barriers in environments requiring robust and long-lasting materials. 18 Mesh SS304 Window Insect Screen BWG 37 Specification: Material: Stainless steel wire304 Wire Diameter: BWG37 Hole Size: 18mesh×18mesh Width: 2', 3', 4', 5'. Length: 30', 50', 100' and so on. Standard mesh size: 2' x100', 2.5'  x100', 3' x100' , 4'  x100' , 5'  x100', 1x25M, 1.2x25M, 1.5x25M. Feature: Resistance for the rust, heat, acid, alkaline and corrosion. Fire resistance and good hardness make stainless steel window screen safer. Stainless steel protects against insect bites and chemical insecticides Durability and stability. Not due to moisture or temperature changes caused by window expansion, deformation, etc. Clean, beautiful, light transmittance and good ventilation, belongs to the environment friendly products.

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