Couplings for casing pipes

Coupling

Type threads

Group strength

114

Short triangular,
Elongated triangular,
OTTM, OTTG, Buttress

D, K, E, L, M, R,
J-55, K-55, N-80,
L-80, C-90,
P-110, Q-125

127

140

146

168

178

194

219

245

273

299

324

340

351

406

426

451

473

508

Couplings for pipes pump-compressor

Coupling

Type of pipes

Group strength

27

Without landing,
With landed outside ends,
Highly sealed (NKM)

D, K, E, L, M, R,
J-55, K-55, N-80,
L-80, C-90,
P-110, Q-125

33

42

48

60

73

89

102

114