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Help CenterJ55-P110 Grade Longkailai Couplings, Spot Supply, Strong Sealing, Affordable Prices
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### J55P110 Grade Longkailai Couplings: Spot Supply, Strong Sealing, Affordable Prices
In the process of oil and gas extraction, couplings are key components that connect oil tubing and casing. Their sealing performance and reliability directly affect the safety and efficiency of downhole operations. J55P110 grade Longkailai couplings, with their superior sealing performance, spot supply, and affordable prices, have become the preferred choice for many oil and gas companies.
Product Features
High Strength and Sealing Performance: J55 grade couplings offer good tensile strength and toughness, capable of withstanding complex downhole environments and mechanical stresses. P110 grade further enhances the resistance to collapse, making it wellsuited for deep wells and highpressure wells. Longkailai couplings use advanced sealing technology to ensure the sealing performance of the connection points, effectively preventing leaks.
Spot Supply: We offer spot supply to ensure that customers can obtain the products they need in a timely manner. Our extensive inventory covers a wide range of specifications and lengths, meeting the urgent needs of different customers.
Affordable Prices: By adopting efficient production processes and cost control measures, we ensure that our product prices are competitive. Additionally, the spot supply model reduces customers' waiting time and procurement costs.
Applications
Conventional Oil and Gas Wells: Suitable for conventional oil and gas wells with depths ranging from 2000 to 3000 meters.
Deep and HighPressure Wells: P110 grade couplings are suitable for deep wells and highpressure wells with depths exceeding 3000 meters.
Emergency Repairs and Replacements: The spot supply model can quickly respond to customers' urgent needs, ensuring the continuity of downhole operations.
Price Advantage
Direct Spot Sales: The spot supply model reduces customers' waiting time and procurement costs, ensuring that customers can obtain the products they need in a timely manner.
Bulk Discounts: For major customers and longterm cooperation projects, we offer customized quotations and bulk purchase discounts to further reduce procurement costs.
Service Assurance
Technical Support: A professional technical team is available to provide support, including coupling selection recommendations, wellbore design consultation, and onsite installation guidance.
AfterSales Service: A comprehensive aftersales service system is in place to quickly respond to customer needs and promptly resolve any issues encountered during product use.
Choosing J55P110 grade Longkailai couplings means opting for a solution with spot supply, strong sealing, and affordable prices for oil and gas extraction. We are committed to providing highquality products and services to support the efficient development of oil and gas extraction.
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.
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.
| OD (inch/mm) | Wall Thickness Range (mm) | Typical Chemical Composition | Application Scenarios |
| 4½" (114.3mm) | 5.21-15.88 | C 0.34-0.39%, Mn 1.25-1.50% (J55/K55) | Shallow oil wells, low-pressure gas wells |
| 5" (127.0mm) | 5.59-12.70 | C 0.34-0.38%, Mn 1.45-1.70% (N80) | Medium-depth wells, conventional oil/gas |
| 5½" (139.7mm) | 6.20-22.22 | C 0.15-0.22%, Cr 12-14% (L80-13Cr) | Sour gas wells, hydrogen sulfide (H₂S) environments |
| 6⅝" (168.3mm) | 7.32-12.06 | C 0.26-0.35%, Mo 0.15-0.25% (P110) | Deep wells, high-pressure gas reservoirs |
| 7" (177.8mm) | 8.05-12.70 | C 0.34-0.38%, Mn 1.45-1.70% (N80) | Shale gas horizontal wells, fracturing operations |
| 9⅝" (244.5mm) | 8.94-12.70 | C 0.15-0.22%, Cr 12-14% (L80-13Cr) | Ultra-deep wells, high-temperature/pressure reservoirs |
| 13⅜" (339.7mm) | 15.88 | C 0.34-0.39%, Mn 1.25-1.50% (J55/K55) | Surface casing, shallow cementing |
| 20" (508.0mm) | 20.62 | C 0.26-0.35%, Mo 0.15-0.25% (P110) | Offshore platform wells, large-diameter well completions |
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:
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.
Heat Treatment Process:
Strict temperature-controlled quenching and tempering guarantee consistent mechanical properties, narrow yield strength ranges, and controllable hardness.
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.
| OD (inch/mm) | Wall Thickness Range (mm) | Typical Chemical Composition | Application Scenarios |
| 4½" (114.3mm) | 5.21-15.88 | C 0.34-0.39%, Mn 1.25-1.50% (J55/K55) | Shallow oil wells, low-pressure gas wells |
| 5" (127.0mm) | 5.59-12.70 | C 0.34-0.38%, Mn 1.45-1.70% (N80) | Medium-depth wells, conventional oil/gas |
| 5½" (139.7mm) | 6.20-22.22 | C 0.15-0.22%, Cr 12-14% (L80-13Cr) | Sour gas wells, hydrogen sulfide (H₂S) environments |
| 6⅝" (168.3mm) | 7.32-12.06 | C 0.26-0.35%, Mo 0.15-0.25% (P110) | Deep wells, high-pressure gas reservoirs |
| 7" (177.8mm) | 8.05-12.70 | C 0.34-0.38%, Mn 1.45-1.70% (N80) | Shale gas horizontal wells, fracturing operations |
| 9⅝" (244.5mm) | 8.94-12.70 | C 0.15-0.22%, Cr 12-14% (L80-13Cr) | Ultra-deep wells, high-temperature/pressure reservoirs |
| 13⅜" (339.7mm) | 15.88 | C 0.34-0.39%, Mn 1.25-1.50% (J55/K55) | Surface casing, shallow cementing |
| 20" (508.0mm) | 20.62 | C 0.26-0.35%, Mo 0.15-0.25% (P110) | Offshore platform wells, large-diameter well completions |
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:
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.
Heat Treatment Process:
Strict temperature-controlled quenching and tempering guarantee consistent mechanical properties, narrow yield strength ranges, and controllable hardness.
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.
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