11th edition casing coupling BTC in stock, conversion joint, N80/L80 oil pipe coupling, 2-7/8”coupling EUE

Advantages/Features:

Tianjin Longkailai Petroleum Equipment Co., Ltd. is a comprehensive enterprise engaged in production, processing, sales, technical research and development, and inventory storage. Located in Jinghai District, Tianjin, China, it was founded in 2008 with a registered capital of 11.18 million RMB. The company has import and export rights, ISO 9001 quality system certification, API 5CT certification from the American Petroleum Institute, and multiple national patent certificates. Our production workshop is equipped with several highprecision CNC lathes, thread rolling machines, hydraulic pressure machines, and complete inspection instruments.

Our products include oil casings, couplings, short joints, and conversion joints, covering specifications such as J55, K55, N801/Q, L80, and P110. We maintain an inventory of approximately 2,000 tons of high corrosionresistant oil casings, including 80S, 90S, 110S, and L801Cr/3Cr/13Cr, stocked yearround. We also undertake special sealing thread processing for oil well pipes and petroleum fittings, including direct connection types, trapezoidal shapes, doublestep, and variable pitch threading, as well as copper plating services.

With fast delivery and high quality, we help customers reduce costs and increase efficiency. Our vision is to build an international petroleum pipeline equipment enterprise through integrity and innovation. We welcome leaders and friends from all sectors to visit and cooperate for mutual development.

1. Since 2008, we have 17 years of experience, a registered capital of 11.18 million RMB, an 8,000 m² workshop, and an annual foreign trade turnover of 20 million RMB.

2. We have import and export rights, ISO 9001 quality system certification, API 5CT certification from the American Petroleum Institute, and multiple national patent certificates.

3. Our production workshop is equipped with several highprecision CNC lathes, thread rolling machines, hydraulic pressure machines, and complete inspection instruments.

4. Our products include J55, K55, N801/Q, L80, and P110 oil casings, couplings, short joints, and conversion joints.

5. We maintain a stock of high corrosionresistant oil casings, including 80S, 90S, 110S, and L801Cr/3Cr/13Cr, with an annual inventory of around 2,000 tons.

6. We provide processing services for special sealing threads, including direct connection types, trapezoidal shapes, doublestep, and variable pitch threading, producing tens of thousands of special couplings each year.

 Oil Pipe Coupling Standards

N80/L80 oil pipe couplings, 27/8” couplings in stock. 

Oil pipe coupling standards: API SPEC 5CT, API SPEC 5B, and the 11th edition of the coupling standard, BTC.

Material of Oil Pipe Couplings: H40, J55, N801, N80Q, L80, P110. 

Specifications of Oil Pipe Couplings: Outer diameter 55.88~141.3 mm (1.9"~4 1/2"). 

Thread Types: Nonthickened (NUE), thickened (EUE), special clearance (SCC).

Purpose of Oil Pipe Couplings: Used to connect two threaded oil pipes and has an internal threaded cylindrical body.

Specifications: 4 1/2”  20” 

Standards: API 5CT/5B, the 11th edition of the coupling standard, BTC.

Manufacturers of Oil Pipe Couplings, Extended Oil Pipe Couplings, Special Clearance Couplings.

Casing Couplings: Processing thread types STC (Short Round Coupling), LTC (Long Round Coupling), BTC (Buttress Coupling).

Oil Pipe Couplings: 23/8'', 27/8'', 31/2'', 41/2''; Thread types: NUE, EUE.

Casing Couplings: 41/2'', 51/2'', 65/8'', 7'', 95/8'', 103/4'', 133/8'', 20''; Thread types: STC, LTC, BTC.

1. We provide coupling blanks (according to API SPEC 5CT (9th edition) requirements) with quality specifications and related certifications to ensure that the coupling blanks are produced according to API requirements.

2. Thread inspection of casing couplings according to the 11th edition of the coupling standard, BTC.

3. Thread processing for couplings, including tight distance, tooth height, pitch, taper, and other parameters, is inspected according to API Spec 5CT (9th edition) and API Spec 5B (15th edition); all dimensional and thread parameter inspections must be well documented.

4. The surface of the threads must be smooth and free of significant tearing, tool marks, abrasion marks, shoulders, or any other defects that disrupt the continuity of the threads; internal and external chamfers and starting threads must be free of burrs and other flaws.

5. The critical thickness of the coupling should be specified.

6. Internal and external edges of the coupling should be rounded, with R≥0.5 mm, and the edges on the bearing surface of the coupling should be chamfered.

7. Thread flaw detection.

We sincerely look forward to your inquiries! We are dedicated to serving you!

Contact:Bone

Email:Bone@dlpoctg.com

Whatsapp/WeChat /Tel: +86-18222899636