Minerals & Metals

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

3 Ton Xiangtan Trolley Wire Locomotive for Mining Tunnel Trolley electric locomotive is a kind of rail transportation traction equipment, powered by transformers and overhead lines. Mainly used in mines where there is no risk of explosion. Because of its special power supply mode, the trolley electric locomotive has no limit on the cruising range. Therefore, it is suitable for long-term and long-distance use. There are also many options in terms of speed regulation and braking methods. Speed control methods include resistance speed control, chopping speed control and frequency conversion speed control. Braking methods include pure mechanical braking, hydraulic braking and compressed air braking. In addition, electric braking can also be selected as an auxiliary braking method. Adhesive / total weight (t) : 3 ton Track gauge (mm) : 600.762.900 Traction (KN) : 6.1 5.74 Max. Traction (KN) : 7.36 Speed(km/h) : 10.6 7.5 Power (KW) : 12KWx1 6.5KWX2 Dimensions Length(mm) : 2700 2750 Width(mm) : 940,1102 or 1240 Height(mm) : 1550 1500 Wheelbase (mm) : 816 850 Wheel diameter (mm) : 650 850 Min Curve radius (m) : 5.7 6 Controller : Resistencia or IGBT Braking method : Mechanical Detailed Photos Advantages of our product 1.Using high-quality steel plates, special rust removal process make sure it more anti-corrosion and suitable for harsh mining environment. 2. Producing motors ourselves, using high lever insulation material and pure copper, ensure the powerful traction force, and suitable for harsh mining environment. 3.Gear anastomosis surface to reach more than 80%, which is far more exceeding the standard. 4.Professionally designed and adjusted frame ensure safe driving and avoids falling off rails. 5.A variety of braking methods can be choose, air brake, hydraulic brake, electric brake, mechanical brake to ensure the safety drive. 6. 40 years richful experience with the ability to design and make customized product according to your requirements. 7. Proving factory online-visiting Factory Test Mining Locomotive test 1.Before Running the locomotive,carry out gear debugging, lighting, gear, and brake adjustment etc.To ensure the normal operation of the locomotive. 2.Carry out a tensile test before leaving the factory to ensure the load performance of the locomotive meets the standard. Our design standards generally exceed the national standard by 10%-20%. 3.Carry out different type running test before leaving the factory to ensure the performance and normal operation of the whole locomotive. It can adapt to various harsh conditions under simulated working conditions. Motor test The motor has to go through many inspection procedures before leaving the factory, and each motor has to be carried out with load running experiments. Explosion-proof motors are carried out with water pressure test. All the test of motor is to ensure that can adapt to harsh working conditions. Cases 1. A good feedback of our lithium battery locomotive from a client of Latin America 2. In order to solve the exist problems of lead-acid batteries. More than 30 lead-acid battery electric locomotives in this large mining were changed into lithium battery electric locomotives, which improved the work enthusiasm and production efficiency of employees, reduced costs,and more environment- friendly. 3. The mining rock drill car designed by Sunward Co., has a small size and simple structure, so the space for placing the lithium battery on the body is very limited. According to the limitation size, our company design a lithium power supply power plan, which perfectly solves the problem of lithium power supply space. In order to adapt to the special industrial and mining environment and improve transportation efficiency, a batch of 2.5-ton lithium battery electric locomotives are designed to Myanmar Clients. FAQ What's your product advantages? We have more 40 years experience in this field so that we could design or produce the locomotive as your requirement. We could also provide online service to teach you how to operate and maintain the locomotive. The most important thing that we produce the main part of the locomotive- The traction motors. we could guarantee the power of the locomotive. 1.Pre-sales Service: The wide product range enables us to provide our customers with individual machines or complete processing plants. Based on our customer's request and budget, our experts make efficient and reliable solutions, and we produce strictly follow customers' order. What's more, every customer has the chance to visit the working machine in the site before placing the order. 2.After-sales Service: Experienced technicians guidance is available on the phone, and on the internet. One or more engineers will be dispatched to the quarry site to help install the customer's plants.Necessary training about machine daily maintenance to local workers is provided also. 3.Methods of Payment: T/T (Telegraphic Transfer) or Western Union or L/C at sight Handling time for an order: Within 10 days supplied from stock 4.Shipping method: Sample order: we suggest Courier express like DHL/UPS/FEDEX or by air Bulk order: we suggest by air or by sea. 5.Quality Control: We have our own experienced QC. There will be strict inspection and testing for every order before shipping out. 6.After Services: a. Our sales team will response for your question within 24 hours (Holiday is Excluded) b. Technical Support will be available in any time c. Free replacement will provide once the failure confirmed caused by our product quality

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

2. Petroleum Tubing: Specifications 1.05”-4-1/2” with End Processing Forms NU (Non-Upset) and EU (Upset) Petroleum tubing is one of the essential devices in the process of oil extraction and transportation. Its main function is to transport oil and natural gas from underground to the surface. At present, the common specifications of petroleum tubing on the market range from 1.05 inches to 4- 1/2 inches, which can meet the extraction requirements of different oil wells. There are mainly two types of end processing forms for tubing: NU (Non-Upset) and EU (Upset). The NU end processing form refers to no additional thickening treatment at the end of the tubing. The advantage of this processing form is the lower cost, which is suitable for some wells with lower strength requirements. The EU end processing form, on the other hand, involves thickening the end of the tubing, which can greatly increase the tensile and torsional strength of the tubing, enabling it to better adapt to high-pressure and complex downhole environments. Different specifications and end processing forms of tubing have their own characteristics in practical applications. For example, the small-diameter tubing of 1.05 inches is usually used in some small oil and gas wells. Its smaller diameter can reduce drilling costs, and in some areas with better geological conditions, this specification of tubing can also meet the extraction requirements. The large-diameter tubing of 4-1/2 inches is mainly used for the extraction of large oil wells and deep wells, which need to withstand greater pressure and flow. Therefore, the requirements for the strength and sealing of the tubing are higher. When selecting petroleum tubing, users need to make decisions based on the specific conditions of the oil well. For example, in some oil wells containing corrosive gases, tubing with anti- corrosion coatings should be selected; in high-pressure oil wells, tubing with the EU end processing form should be chosen. In addition, the material of the tubing is also very important. Common materials include carbon steel, alloy steel, etc., and there are differences in performance and cost for tubing made of different materials. The manufacturing process of petroleum tubing is also very strict and involves multiple procedures, including inspection of raw materials, formation of the tube body, end processing, and quality inspection. Each procedure must be carried out strictly in accordance with national and industry standards to ensure the quality and performance of the tubing. With the continuous progress of science and technology, the manufacturing technology of petroleum tubing is also constantly innovating. In the future, more high-performance and high- reliability tubing 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. Specifications: 1.05”-4-1/2” with end processing forms NU (Non-Upset) and EU (Upset) 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 (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

Tubing Couplings and Coupling Material Eccentric Wear I. Tubing Couplings Product Features: Tubing couplings are essential accessories used to connect tubing, typically made from high-strength metallic materials such as carbon steel or alloy steel. These materials provide excellent corrosion resistance and fatigue performance. The design of the couplings effectively disperses stress concentrations in the wellb, preventing cracks or fatigue damage caused by excessive localized stress. Common types of tubing couplings include standard couplings, semi-upset couplings, internally upset couplings, threaded couplings, sealing couplings, and ultra-high-pressure couplings. Each type offers solutions tailored to different well conditions and pressure environments. Application Fields: Tubing couplings play a crucial role in the oil and natural gas industry, primarily used to connect tubing to ensure the continuous flow of oil or natural gas from the wellb to the surface. They are used to connect various types and sizes of tubing, including straight pipes, transition pipes, elbows, and other equipment such as floating production storage and offloading systems and pipeline valves. Additionally, tubing couplings are widely used in plumbing, petrochemical, heating systems, and construction engineering. Product Advantages: 1. High Strength and Durability: Manufactured from high-quality materials, these couplings can withstand high pressure, high temperature, and corrosive conditions. 2. Sealing Performance: Special thread designs and sealing structures ensure the tightness of the connection. 3. Multiple Type Options: A variety of types and specifications are available to meet different application scenarios. 4. Customized Services: Customized solutions can be provided based on specific customer needs. II. Coupling Material Eccentric Wear Product Features: Eccentric wear of coupling material refers to the wear phenomenon caused by friction between the sucker rod and the tubing coupling. This wear can reduce the strength of the coupling and may even cause fractures, affecting the normal operation of the oil well. To address this issue, various anti-wear technologies and products have been developed, such as the KZX Sucker Rod Anti- Wear Centralizer, JY Anti-Wear Device, and Wear-Reducing Tubing Couplings. These products enhance the wear resistance of the couplings through special material treatments (such as laser surface hardening and ion implantation N+ treatment) or structural designs (such as wear-resistant and corrosion- resistant non-metallic composite material coatings). Application Fields: Solutions for eccentric wear are mainly applied in the oil and natural gas extraction industry, especially for wells that require long-term operation and are at high risk of friction. These anti-wear products effectively reduce the wear between the sucker rod and the tubing coupling, extending the service life of the equipment and reducing maintenance costs. Product Advantages: 1. Enhanced Wear Resistance: Special material treatments and structural designs significantly improve the wear resistance of the couplings. 2. Reduced Maintenance Costs: Effectively reduces eccentric wear, extends the service life of the equipment, and reduces maintenance and replacement costs caused by wear. 3. Increased Production Efficiency: Reduces downtime caused by equipment failure, ensuring the efficient operation of oil wells. 4. Strong Environmental Adaptability: Maintains good performance in complex downhole environments. In the oil and natural gas industry, tubing couplings and solutions for eccentric wear of coupling material 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 the equipment can be effectively improved, providing strong support for oil extraction. Additional Information: - 4-1/2" LT Thread Oil Casing: Oil casing is primarily used for drilling oil and gas wells and for the transportation of oil and gas. It includes drill pipes, oil casing, and sucker rods. - Coupling Manufacturers: Offering extended-length tubing couplings and special clearance couplings. - Casing Couplings: Available thread types include ST (Short Round Thread), LT (Long Round Thread), and BT (Buttress Thread). - Tubing Couplings: Sizes include 2-3/8", 2-7/8", 3-1/2", 4-1/2" with thread types NUE and EUE. - Casing Couplings: Sizes include 4-1/2", 5-1/2", 6-5/8", 7", 9-5/8", 10-3/4", 13-3/8", 20" with thread types ST, LT, BT. Quality Assurance: 1. Coupling Material Certification: Provide a quality statement for coupling blanks in accordance with API Spec 5CT (9th Edition) requirements, along with relevant documentation to ensure that the coupling blanks are produced in compliance with API standards. 2. Thread Inspection: For casing couplings, the 11th Edition couplings with BT threads are available as standard stock. Thread processing parameters such as close tolerance, tooth height, pitch, and taper are inspected in accordance with API Spec 5CT (9th Edition) and API Spec 5B (15th Edition). All dimensional and thread parameter inspections should be well documented. The thread surface should be smooth and free from obvious tearing, tool marks, grinding marks, shoulders, or any other defects that disrupt the continuity of the thread. The internal and external chamfers and starting threads should be free from burrs and sharp edges. 3. Critical Thickness of Couplings: The critical thickness of the couplings should be specified. 4. Chamfered Casing Couplings: The 11th Edition couplings with BT threads are available as standard stock. Conversion couplings and thread change couplings for N80/L80 tubing couplings with 2-7/8" EUE are also available. 5. Chamfered Edges: The internal and external chamfered edges of the coupling should have a radius of ≥0.5 mm. Chamfering should be applied to the inner and outer edges of the coupling's load-bearing surface. 6. Thread Inspection: Ultrasonic testing of threads is conducted to ensure quality. We sincerely look forward to your call! We are committed to serving you wholeheartedly! Contact:Bone Email:Bone@ , dlpoctg.com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

FOXHYD-511 Special Thread, VAM FJL Gas-Tight Thread, HYD-PH6 Direct-Connect Gas-Tight Thread In the oil and natural gas industry, the reliability of thread connections directly affects the safety and efficiency of operations. Our products, including FOXHYD-511 special thread, VAM FJL gas-tight thread, and HYD-PH6 direct-connect gas-tight thread, are designed and manufactured using advanced concepts and processes to provide high-quality thread connection solutions. Product Features: - The FOXHYD-511 special thread is characterized by high strength, excellent sealing performance, and fatigue resistance. - The VAM FJL gas-tight thread features a special sealing structure that effectively prevents gas leakage. - The HYD-PH6 direct-connect gas-tight thread offers convenient connection, reliable sealing, and good vibration resistance. Application Fields: These thread products are widely used in oil and natural gas drilling, extraction, and transportation. During drilling operations, they are used to connect drill pipes and drill collars, ensuring smooth drilling. 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: Our thread products are manufactured from high-quality materials and undergo strict quality inspection to meet relevant standards. In the design process, we consider various operational requirements to ensure reliability and durability. Additionally, we provide professional technical support and after-sales service to address any issues customers may encounter. Custom Processing: Tianjin Longkailai Petroleum Equipment Co., Ltd. undertakes the processing and production of various special threads for oil and casing pipes, including high gas-tightness thread processing. We offer custom processing of special thread couplings, special thread tubing couplings, special thread casing couplings, and other related products. We can also process special threads for tubing and casing in sizes ranging from 2-3/8 inches to 20 inches. Special Thread Advantages: - High joint strength, matching or exceeding the strength of the pipe body, suitable for deep and ultra-deep wells. - Excellent sealing performance, suitable for high-pressure gas wells, oil wells, and thermal recovery wells. - Strong bending resistance, suitable for directional wells, extended-reach wells, and horizontal wells. - Easy and reliable connection, suitable for drilling operations in harsh environments such as deserts and offshore areas. - Good anti-sticking performance, allowing repeated loosening and tightening without damaging the threads. - High resistance to over-torque. - Good corrosion resistance. Contact:Bone Email:Bone@dlpoctg. , com Whatsapp/WeChat /Tel: +86-18222899636

Minimum Order: 1 bags

Fencing is fundamental. From securing properties and protecting valuable assets to defining boundaries and managing livestock, wire mesh fences play a crucial role in countless applications. But how are these ubiquitous wire mesh fences made efficiently and reliably? The answer lies in the powerful technology of Wire Mesh Fence Machines. If you're in the fencing industry, construction, agriculture, or any sector requiring large-scale fencing solutions, understanding the capabilities of these machines is key. They are not just equipment but engines of productivity, quality, and cost-effectiveness. Wire Mesh Fence Machines What Exactly is a Wire Mesh Fence Machine? At its core, a Wire Mesh Fence Machine is specialized industrial equipment designed to manufacture wire mesh fencing automatically. Depending on the type, these machines can weave wire into chain-link patterns or weld intersecting wires together to create panels (welded mesh). They handle tasks like wire feeding, straightening, cutting, weaving/welding, and sometimes even rolling or panelizing the finished product with remarkable speed and precision. The Advantages of Wire Mesh Fence Machines Efficiency & Speed: Manual fence production is time-consuming and labour-intensive. Automated machines operate continuously at high speeds, drastically increasing output volume. This means faster project completion and the ability to meet large orders quickly. Quality & Precision: Automation eliminates human error. These machines produce fences with uniform mesh sizes, consistent wire tension, strong welds or knuckles, and precise dimensions every single time. This reliability is crucial for security and structural integrity. Significant Cost Savings: While the initial investment exists, the long-term savings are substantial. Reduced labour costs per unit, minimized material waste due to precise operation, and lower rework rates contribute to a more profitable operation and competitive pricing for the end product. Enhanced Automation & Reduced Labor: Modern machines often feature high levels of automation, requiring fewer operators. This not only cuts down on labour costs but also simplifies training and improves workplace safety by minimizing manual handling. Versatility in Production: Advanced Wire Mesh Fence Machines can often be adjusted to produce various fence specifications. This includes different mesh sizes, fence heights, wire diameters, and compatibility with various wire types (e.g., galvanized steel, PVC coated wire), catering to diverse market needs. Durability & Reliability: Built for industrial use, these machines are typically robust and designed for longevity, ensuring a reliable production process with proper maintenance. Where Do Wire Mesh Fences? The efficiency and quality provided by Wire Mesh Fence Machines enable the widespread use of wire mesh fences across numerous sectors: Security Fencing: Protecting industrial sites, airports, power plants, military bases, and critical infrastructure. The see-through nature allows for surveillance while providing a strong physical barrier. Perimeter & Boundary Fencing: Defining property lines for residential areas, commercial properties, schools, and parks in a cost-effective manner. Agricultural Fencing: Containing livestock (cattle, sheep, goats), protecting crops from wildlife, and creating enclosures for poultry farms. Different mesh sizes cater to different animal types. Construction Sites: Providing temporary safety barriers, securing materials and equipment, and controlling site access. Sports Facilities: Enclosing tennis courts, basketball courts, baseball fields, and other recreational areas to contain balls and define playing zones. Animal Enclosures: Used in zoos, wildlife parks, and for pet kennels, providing secure and safe containment. Gabions & Erosion Control: Specific types of mesh produced can be used to create gabion baskets (wire cages filled with rocks) for retaining walls and erosion control. Industrial & Warehousing: Creating internal partitions, machine guarding, and secure storage cages. Wire Mesh Fence Machines Connecting Machine Efficiency to Fence Utility The advantages of the wire mesh fence machine directly translate to the benefits of the fence. The machine's speed and efficiency make wire mesh fencing an affordable solution for large areas. Its ability to produce consistent, high-quality mesh ensures the reliability and durability needed for security and agricultural applications. The versatility of the machine allows manufacturers to produce the specific types of fencing required for everything from a backyard garden to a high-security perimeter. Wire Mesh Fence Machines are the backbone of efficient, high-quality fence production. They empower manufacturers to meet diverse market demands with speed, precision, and cost-effectiveness. The resulting fences provide essential security, delineation, and protection across a vast spectrum of applications. Whether you are looking to upgrade your production capabilities or seeking reliable fencing solutions, understanding the power behind the product – the Wire Mesh Fence Machine – highlights the value and dependability you can expect. Explore our range of advanced Wire Mesh Fence Machine products or contact us today to discuss your specific requirements with our experts. E-mail: ivy@ozimachine.com WhatsApp: +8613932868088

Minimum Order: 1 bags