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API 5CT K55 J55 L80-1 L80-9Cr L80-13Cr N80-1 N80-Q C90 T95 P110 C110 Q125 Casing Coupling

API 5CT K55 J55 L80-1 L80-9Cr L80-13Cr N80-1 N80-Q C90 T95 P110 C110 Q125 Casing Coupling
Couplings are used to hold the neighboring joints together during axial tension or compression. The common oilfield API-5CT casing couplings include J55, K55, N80 and P110 in accordance with API 5CT/5B, can be classified as STC (short thread), LTC (long thread) BTC (buttress thread) and premium connections.
Product Details:

Product details


We provide casing couplings from 4-1/2″ to 20″, in grade J55, K55, N80, L80 and P110.

Threads are used as mechanical means to hold the neighboring joints together during axial tension or compression. For all casing sizes, the threads are not intended to be leak resistant when made up.

The round-thread (STC or LTC) casing-joint strength is given as the lesser of the fracture strength of the pin and the jump-out strength.

1. Size: 4-1/2″ ~ 20″
2. Standard: API 5CT/5B
3. Type: STC
4. Grade:J55/K55/N80/L80/P110


Quality Assurance

1. Manufacture License and Certificate is a must.

2. We gave our Qualified Quality Engineer supervision in the factory for each PO.

3. On site checking before shipment is warm recommended.

4. Quality Target: To Control, find and solve quality issues before reaching the customer


If you are interested in our api 5ct k55 j55 l80-1 l80-9cr l80-13cr n80-1 n80-q c90 t95 p110 c110 q125 casing coupling, welcome to place an order with our factory. As one of the leading manufacturers and suppliers in China, we are always at your service.

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