Casing coupling

Casing coupling is for the dimensions range from 4 1/2 inch to 20inch.

• BTC: Buttress coupling
• LTC: Long buttress coupling
• STC: Short buttress coupling
All three types has same thickness of the casing pipe body, just have different lengths.

STC Coupling

API Casing Coupling Short Thread

Forwell provide STC casing coulings from 4-1/2″ to 20″, in grade J55, K55, N80,R95,L80,L80-13Cr,C90,T95,C110,P110,Q125.

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. 

LTC Coupling

API Casing Coupling Long Thread

We provide LTC casing coulings from 4-1/2″ to 20″, in grade J55, K55, N80,R95,L80,L80-13Cr,C90,T95,C110,P110,Q125

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. 

BTC Coupling

API Casing Coupling Buttress Thread

We provide BTC casing coulings from 4-1/2″ to 20″, in grade J55, K55, N80,R95,L80,L80-13Cr,C90,T95,C110,P110,Q125

The buttress thread casing joint strength is given as the lesser of the fracture strength of the pipe body (the pin) and the coupling (the box).Contact us Skype:Kaden Shi