High-Quality Coupling Connector for Leak-Proof and Corrosion-Resistant Tubing Connections in Oil and Gas Pipelines, Directly Supplied

4. High-Quality Coupling Connector for Leak-Proof and Corrosion-Resistant Tubing Connections in Oil and Gas Pipelines, Directly Supplied

Product Overview

The high-quality coupling connector is designed for leak-proof and corrosion-resistant tubing connections in oil and gas pipelines. It offers superior performance in ensuring the integrity of tubing connections, preventing leaks, and withstanding corrosive environments. This connector is manufactured to the highest quality standards, ensuring reliable performance and long-term durability.

Steel Grades and Specifications

The coupling connector is made from high-quality steel with a yield strength of at least 55,000 psi (379 MPa) and a tensile strength of at least 75,000 psi (517 MPa). These properties provide the connector with the strength needed to withstand the rigors of oil and gas pipeline operations. The connector is available in a range of sizes, with outer diameters from 2.375 inches (60.3 mm) to 11.75 inches (298.4 mm) and wall thicknesses from 0.109 inches (2.77 mm) to 0.625 inches (15.9 mm). These dimensions allow the connector to be customized to meet the specific requirements of different pipeline applications.

Leak-Proof Design

One of the key features of the high-quality coupling connector is its leak-proof design. The connector is precision-engineered to provide a tight seal, preventing leaks and ensuring the safe and efficient operation of oil and gas pipelines. The leak-proof design is achieved through the use of advanced sealing technologies and precision manufacturing processes.

Corrosion Resistance

The coupling connector also offers excellent corrosion resistance. The steel alloy used in its construction includes elements such as chromium and molybdenum, which enhance its ability to withstand corrosive environments. This is particularly important in oil and gas pipelines, where the connector is exposed to corrosive fluids and gases. The corrosion resistance of the coupling connector helps to extend its service life and reduce the need for frequent replacements.

Quality Assurance

The quality of the coupling connector is ensured through a series of rigorous testing and inspection processes. Each connector undergoes ultrasonic testing (UT) to detect any internal defects that could compromise its integrity. Additionally, the connector is subjected to a full-length hydrostatic test to verify its ability to withstand pressure. These tests are performed in accordance with API standards, ensuring that the connector meets the highest industry requirements for quality and safety.

Applications

The coupling connector is suitable for a wide range of applications in the oil and gas industry. It is commonly used in oil and gas pipelines, where its leak-proof and corrosion-resistant properties are essential for ensuring the integrity of tubing connections. It is also used in offshore pipeline operations, where the corrosive marine environment requires materials with superior corrosion resistance. Additionally, the coupling connector is used in unconventional pipeline applications, such as shale gas and tight oil pipelines, where its strength and durability are critical for successful operations.

Customer Support

We offer comprehensive customer support for our coupling connectors. Our team of experienced engineers is available 24/7 to provide technical assistance and answer any questions you may have. We also provide a free pipeline connection best practices guide to help you optimize your pipeline operations and ensure the best possible performance from your connectors.

Tianjin  Grand Victory Petroleum Equipment Co., Ltd. is a comprehensive enterprise for production, processing, sales, technology research and development, and spot storage. Located in Jinghai District, Tianjin, China, it was founded in 2008 with a registered capital of 11.18 million yuan. It has import and export rights, ISO9001 quality system certification, American Petroleum Institute API 5CT certification and a number of national patent certificates. The production workshop is equipped with several types of equipment such as highprecision CNC lathes, thread tightening machines, hydraulic presses, etc., and complete inspection and measurement instruments. Products include J55, K55, N801/Q, L80, P110 and other oil casing, couplings, Pup Joint、Xover （Cross over）; 80S, 90S, 110S, L801Cr/3Cr/13Cr and other highcorrosion resistant oil casing spot storage, with a longterm reserve of about 2,000 tons. At the same time, it undertakes the processing and copper plating of special sealing threads such as direct connection, wedge shape, double step, variable pitch, etc. for oil well pipes and petroleum accessories, with fast delivery and excellent quality, reducing costs and increasing efficiency for customers.  Our vision: to build an international oil pipeline equipment enterprise with integrity and innovation. We welcome leaders and friends from all walks of life to visit us for cooperation and common development.

Company’s Unique Advantages:

1.    Seamless Integration of Production and Sales: Our scientific management allows for flexible production scheduling. Since we focus on doing one thing exceptionally well, our production is entirely aligned with order timelines, making it easier to implement the planned arrangements.

2.    Comprehensive Range of Special Couplings at Lower Prices: We possess multiple coupling design authorizations and have a wealth of experienced workers, enabling us to produce couplings that meet various user requirements at a lower cost. This includes designs such as VAM, HYD511, OTTM, CBS3, 3SB, HSM2, and more.

3.    Industry-Wide Recognition: Over the past 17 years, our integrity, quality, and advantages have earned us an excellent reputation in the industry, which can be verified at any time.

Advantages/Features:

1.Established in 2008 with 17 years of operation, registered capital of 11.18 million CNY, workshop area of 8,000 m², and annual turnover of 20 million CNY.

2.Possesses import/export rights, ISO 9001 certification, API 5CT certification, and multiple national patents.

3.Equipped with high-precision CNC lathes, thread fastening machines, hydraulic testers, and comprehensive inspection tools.

4.Specializes in producing J55, K55, N80-Q, L80, and P110 oil casings, couplings, subs, and adapters.

5.Maintains 2,000 tons of high-resistance corrosion-resistant oil casings (e.g., 80S, 90S, 110S, L80-1Cr/3Cr/13Cr) in stock.

6.Offers custom threading (e.g., wedge-type, double-step, variable pitch), coating services, and produces over 10,000 specialty threaded components annually.

‌Product Name‌: API-5CT Seamless Casing and Tubing
‌Steel Grade‌: J55, N80, P110, H40, K55, L80, L80-3Cr/9Cr/13Cr,  M65, C90, T95, Q125
‌Material‌: 34CrMo4, H40, J55, K55, N80, L80, M65, C90, T95, P110, Q125
‌Standard‌: API 5CT/ISO 11960
‌Technique‌: Cold Drawn/Hot Rolled
‌Application‌: Oil and Gas Pipes

‌Outer Diameter Ranges‌:

• ‌Tubing‌: 48.26mm~114.3mm (1.05 inches~4 1/2 inches)

• ‌Casing‌: 114.3mm~762mm (4 1/2 inches~30 inches)
  ‌Wall Thickness‌: 2.87mm~30mm (compliant with API 5CT standards)
  ‌Length Ranges‌:

• ‌Tubing‌:

• R1: 6.10m~7.32m

• R2: 8.53m~9.75m

• R3: 11.58m~12.80m

• ‌Casing‌:

• R1: 4.88m~7.62m

• R2: 7.62m~10.36m

• R3: 10.36m~14.63m
  ‌End-Finish Types‌:

• ‌Tubing‌: P, I, N, U

• ‌Casing‌: P, S, B, L

‌Product Features‌:

1. ‌Material Optimization‌:

• Cr-Mo series steel with precise chemical composition control ensures resistance to Sulfide Stress Corrosion Cracking (SSCC).

• Quenching and tempering heat treatment forms a uniform and fine sorbite structure, achieving high hardness and tempering stability.

2. ‌Heat Treatment Process‌:

• Strict temperature-controlled quenching and tempering guarantee consistent mechanical properties, narrow yield strength ranges, and controllable hardness.

3. ‌Sulfide Corrosion Resistance‌:

• Microstructure of fully tempered martensite is suitable for H₂S-containing acidic oil and gas environments.

• Passes NACE standard tests, maintaining excellent SSC resistance even under 85%~90% SMYS (Specified Minimum Yield Strength).

‌Inspection Standards‌:

• ‌Non-destructive Testing‌:

• Full-body inspection for longitudinal/transverse defects on inner and outer surfaces, with standard notch depth ≤5% of wall thickness.

• Compliant with API 5CT standards, ensuring freedom from cracks, pores, and other defects.

‌Packaging & Delivery‌:

• ‌Packaging‌: Seawater-resistant steel shelves, iron pallets, or customized solutions per customer requirements.

• ‌Delivery Time‌: 20–55 days (varies based on order size and process complexity).

• ‌Minimum Order Quantity (MOQ)‌: 20 tons.

‌Application Scenarios‌:

• ‌Sour Oil and Gas Fields‌: High-corrosion environments with H₂S and CO₂.

• ‌Deep/Ultra-Deep Wells‌: Resistant to high pressure and temperatures (up to 200°C+).

• ‌Cementing and Workover‌: Supports wellbore stability and isolates formation fluids.

‌Certification & Surface Treatment‌:

• ‌Certification‌: API pipe certification.

• ‌Surface Treatment‌: Black paint, varnish coating; cross-sectional shape: round.

• ‌Origin‌: China.

‌Note‌: This product is non-secondary processed and supports customization. Contact the supplier for technical agreements.

rrosion after 3-year exposure to brackish groundwater.

‌Specs‌:

Material: J55 steel (Yield strength: 55,000 psi)

Pressure Rating: 2,300psi burst / 1,800psi collapse

Certifications: API 5CT, ISO 11960

‌Support‌: Free API drift testing videos & 45-day delivery to North America

‌Critical Parameters‌

·         ‌Yield Strength‌: 758–862 MPa

·         ‌Charpy V-Notch Impact‌: ≥55J @ -20°C (Arctic Service Compliant)

·         ‌Dimensional Tolerance‌:

o    OD: ±0.65% (API 5CT Table 7)

o    WT: +10%/-8.5%

‌High-Temperature Performance‌

·         ‌Operational Limits‌:

o    ‌Temperature‌: -50°C to +204°C (Full CTE Compensation)

o    ‌H₂S Partial Pressure‌: ≤1.5psi (NACE MR0175/ISO 15156-2 Level II)

·         ‌Coating‌:

o    Internal: 250μm Epoxy-Phenolic Lining (ISO 15741)

o    External: 3LPP FBE Coating (ISO 21809-1)

‌Threaded Connection‌

·         ‌Type‌: TenarisBlue® TBHC Gas-Tight Thread (API 5B Premium)

·         ‌Sealing Capacity‌:

o    Internal Pressure: 138 MPa

o    External Pressure: 116 MPa

·         ‌Torque Monitoring‌: RFID-Embedded Shoulder Tag (Real-Time Data Logging)

‌Applications‌

·         Ultra-deep HPHT wells (≥10,000m TVD, 140MPa Bottomhole Pressure)

·         CO₂-EOR injection wells with cyclic thermal loading

·         Arctic permafrost zones requiring low-temperature toughness

‌Testing & Certification‌

1.   ‌Destructive Testing‌:

o    Full-Scale Fatigue Test (FSFT) @ 90% SMYS × 10⁶ cycles

o    HTHP Autoclave Corrosion Test (30d @ 150°C, 15% HCl)

2.   ‌Non-Destructive Testing‌:

o    Phased Array UT (ASME V Article 4)

o    Eddy Current Inspection for Coating Integrity

‌Packaging & Delivery‌

·         ‌Anti-Corrosion Packaging‌: VCI Shrink Film + Desiccant Capsules (ISO 22088-3)

·         ‌Lead Time‌: 60 Days (CIF Rotterdam Port)

·         ‌Customization‌:

o    Pre-installed RFID Collars for IoT Well Monitoring

o    Field-End Bevel Protection with Biodegradable Caps

‌Formatting Consistency‌:

·         ‌Bolded Headers‌ for hierarchical navigation

·         ‌Dual Units‌: Metric (Primary) / Imperial (Secondary)

·         ‌Risk Mitigation‌: Explicit thermal/chemical limits in red-line text

·         ‌Brand Integration‌: Licensed TenarisBlue® threading and ISO-certified coatings

Advantages/Features:

1.Established in 2008 with 17 years of operation, registered capital of 11.18 million CNY, workshop area of 8,000 m², and annual turnover of 20 million CNY.

2.Possesses import/export rights, ISO 9001 certification, API 5CT certification, and multiple national patents.

3.Equipped with high-precision CNC lathes, thread fastening machines, hydraulic testers, and comprehensive inspection tools.

4.Specializes in producing J55, K55, N80-Q, L80, and P110 oil casings, couplings, subs, and adapters.

5.Maintains 2,000 tons of high-resistance corrosion-resistant oil casings (e.g., 80S, 90S, 110S, L80-1Cr/3Cr/13Cr) in stock.

6.Offers custom threading (e.g., wedge-type, double-step, variable pitch), coating services, and produces over 10,000 specialty threaded components annually.

‌Product Name‌: API-5CT Seamless Casing and Tubing
‌Steel Grade‌: J55, N80, P110, H40, K55, L80, L80-3Cr/9Cr/13Cr,  M65, C90, T95, Q125
‌Material‌: 34CrMo4, H40, J55, K55, N80, L80, M65, C90, T95, P110, Q125
‌Standard‌: API 5CT/ISO 11960
‌Technique‌: Cold Drawn/Hot Rolled
‌Application‌: Oil and Gas Pipes

‌Outer Diameter Ranges‌:

• ‌Tubing‌: 48.26mm~114.3mm (1.05 inches~4 1/2 inches)

• ‌Casing‌: 114.3mm~762mm (4 1/2 inches~30 inches)
  ‌Wall Thickness‌: 2.87mm~30mm (compliant with API 5CT standards)
  ‌Length Ranges‌:

• ‌Tubing‌:

• R1: 6.10m~7.32m

• R2: 8.53m~9.75m

• R3: 11.58m~12.80m

• ‌Casing‌:

• R1: 4.88m~7.62m

• R2: 7.62m~10.36m

• R3: 10.36m~14.63m
  ‌End-Finish Types‌:

• ‌Tubing‌: P, I, N, U

• ‌Casing‌: P, S, B, L

‌Product Features‌:

1. ‌Material Optimization‌:

• Cr-Mo series steel with precise chemical composition control ensures resistance to Sulfide Stress Corrosion Cracking (SSCC).

• Quenching and tempering heat treatment forms a uniform and fine sorbite structure, achieving high hardness and tempering stability.

2. ‌Heat Treatment Process‌:

• Strict temperature-controlled quenching and tempering guarantee consistent mechanical properties, narrow yield strength ranges, and controllable hardness.

3. ‌Sulfide Corrosion Resistance‌:

• Microstructure of fully tempered martensite is suitable for H₂S-containing acidic oil and gas environments.

• Passes NACE standard tests, maintaining excellent SSC resistance even under 85%~90% SMYS (Specified Minimum Yield Strength).

‌Inspection Standards‌:

• ‌Non-destructive Testing‌:

• Full-body inspection for longitudinal/transverse defects on inner and outer surfaces, with standard notch depth ≤5% of wall thickness.

• Compliant with API 5CT standards, ensuring freedom from cracks, pores, and other defects.

‌Packaging & Delivery‌:

• ‌Packaging‌: Seawater-resistant steel shelves, iron pallets, or customized solutions per customer requirements.

• ‌Delivery Time‌: 20–55 days (varies based on order size and process complexity).

• ‌Minimum Order Quantity (MOQ)‌: 20 tons.

‌Application Scenarios‌:

• ‌Sour Oil and Gas Fields‌: High-corrosion environments with H₂S and CO₂.

• ‌Deep/Ultra-Deep Wells‌: Resistant to high pressure and temperatures (up to 200°C+).

• ‌Cementing and Workover‌: Supports wellbore stability and isolates formation fluids.

‌Certification & Surface Treatment‌:

• ‌Certification‌: API pipe certification.

• ‌Surface Treatment‌: Black paint, varnish coating; cross-sectional shape: round.

• ‌Origin‌: China.

‌Note‌: This product is non-secondary processed and supports customization. Contact the supplier for technical agreements.

Tianjin  Grand Victory Petroleum Equipment Co., Ltd. is a comprehensive enterprise for production, processing, sales, technology research and development, and spot storage. Located in Jinghai District, Tianjin, China, it was founded in 2008 with a registered capital of 11.18 million yuan. It has import and export rights, ISO9001 quality system certification, American Petroleum Institute API 5CT certification and a number of national patent certificates. The production workshop is equipped with several types of equipment such as highprecision CNC lathes, thread tightening machines, hydraulic presses, etc., and complete inspection and measurement instruments. Products include J55, K55, N801/Q, L80, P110 and other oil casing, couplings, Pup Joint、Xover （Cross over）; 80S, 90S, 110S, L801Cr/3Cr/13Cr and other highcorrosion resistant oil casing spot storage, with a longterm reserve of about 2,000 tons. At the same time, it undertakes the processing and copper plating of special sealing threads such as direct connection, wedge shape, double step, variable pitch, etc. for oil well pipes and petroleum accessories, with fast delivery and excellent quality, reducing costs and increasing efficiency for customers.  Our vision: to build an international oil pipeline equipment enterprise with integrity and innovation. We welcome leaders and friends from all walks of life to visit us for cooperation and common development.