Tianjin Longkailai Oil Tubing: Onshore & Offshore Drilling, Pipeline Construction

 Tianjin Longkailai Oil Tubing Series- 2 3/8  inches- 2 7/8 inches- 3 1/2 inches- 4 inches- 4 1/2 inches- 5 inches- 5 1/2  inches- 6 5/8 inches- 7 inches- 7 5/8 inches- J55: 55,000 psi- N80: 80,000  psi- P110: 110,000 psi-  Tianjin  Longkailai offers competitive pricing for high-quality oil tubing. J55 tubing  is priced at Y per foot, and P110 at $Z per foot.-  Significant discounts are available for  bulk orders, ensuring cost savings for large-scale projects.-  Tianjin Longkailai can customize tubing to  meet specific project requirements, offering tailored solutions at optimized  prices.-  Manufactured from high-grade  steel, ensuring durability and reliability.-   Special coatings and treatments enhance the tubing's resistance to  corrosion, extending its lifespan.-   Suitable for a wide range of applications, including onshore and  offshore drilling, gas extraction, and more.-   Ideal for drilling operations in various geological conditions.-  Used in the construction of pipelines for  transporting oil and gas.-  Suitable  for industrial applications requiring high-strength tubing.-  Tianjin Longkailai's oil tubing is  manufactured to the highest industry standards, ensuring consistent  quality.-  Our dedicated team provides  technical support and after-sales service to ensure customer satisfaction.-  With a global distribution network, Tianjin  Longkailai's oil tubing is available wherever you need it.     

?High-Temperature Performance?

·         ?Operational Limits?:

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

o    ?H?S 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)

·         CO?-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 × 10? 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 H?S-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 H?S and CO?.

• ?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    ?H?S 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)

·         CO?-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 × 10? 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 H?S-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 H?S and CO?.

• ?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.