Quick Details
Place of Origin:
Hebei, China
Brand Name:
Model Number:
Female, FAMALE
Reducing, round
Head Code:
ROUND, round
Outer Diamete:
Oil pipe
Product Certification

API Certified

Factory Direct Sale Manufacturers Api Drilling Pipe Crossover Casing Coupling

Product Description
Size Thread Connections Surface Treatment Grade Small End Big End 2-3/8EU External upset 8thread per inch 2-3/8 EU BOX * PINBOX * BOXPIN * PIN T1/T2/Tx J55/N80/L80/P110 2-7/8 EU 3-1/2 EU 4-1/2 EU 4-1/2 LTC 4-1/2 STC 4-1/2 BTC 5 LTC 5 STC 5 BTC 7 LTC 7 STC 7 BTC 8-5/8 LTC 8-5/8 STC

Note: T1—Phosphate surface treatment

T2—Polymer surface treatment

Tx— Surface treated by buyer’s requirement.

* Other sizes are available by buyer’s requirements

·1,All Coupling Stock is certified to API Standards by an independent 3rd party laboratory prior to coupling manufacturing.

·2,After machining all couplings undergo 100% thread inspection.

·3,Colour Coding and Marking as per API Standard

·4,MTRs available for all coupling

·5,Special Clearance Buttress Casing Couplings up to 10-3/4” are available on request.

·6,Slip on Couplings available on request.

·7,The manufacturing of certain Sizes and Grades of large diameter Casing Coupling are subject to the availability of raw material.

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Our Certificate

Production Process
Company Information

Hengshui Weijia Petroleum Equipment Manufacturing Co., Ltd. was established in 2 0 0 9, located at Fuyang East Road, Ji zhou District, Heng shui City, He bei Province, close to Beijing Airport and Tianjin Port with convenient transportation and beautiful environment. It is a joint venture of Western Oilfield Materials Supply Co., Ltd. and Hengshui Yaotai Machinery Manufacturing Co., Ltd.

As a professional supplier of Tubing pup joint ,Casing pup joint,Tubing couplings, Casing couplings, Crossovers , Swages and other petroleum accessories.We have an excellent team, advanced production equipment, strict inspection procedures and specialized laboratories, as well as professional R & D technicians to meet customers’ different customization needs.In order to provide the best products and services, we have established a modern quality management system strictly in accordance with international standards.In addition, due to the huge overseas market, most of our products have passed A P I – 5 C T, I S O 9 0 0 1 quality system, I S O 1 4 0 0 1 environmental system, O H S A S 1 8 0 0 1 environmental system.At the same time, we also undertake O E M and O D M orders. If you have any new ideas for the product, please contact us. We look forward to working with friends from all over the world.

Our Customers
Packaging & Shipping
Contact us

Q1: Are you trading company or manufacturer ?A1: We are factory.Q2: How long is your delivery time?A2: Generally it is 5-10 days if the goods are in stock.or it is within 30 days if the goods are not in stock,

it is according to quantity.Q3: What’s the main application of Casing and Tubing?A3: Casing and Tubing are widely used in oil pipe, gas pipe, oil field.Q4: What kind of type of end-finish can you offer?A4: For Tubing: Plain end, NU T&C, EU T&C, Integral Joint