#casing couplings

[octg-coupling-pupjoint-x-ov-blog]

3 1/2" N80 EUE tubing couplings extended by 1" overlength

4 1/2" N80 EUE tubing couplings extended by 1" overlength

2-7/8" P110 EUE tubing couplings extended by 1" overlength

2-3/8" L80 EUE tubing couplings extended by 1" overlength

COUPLING 2 3/8” L80 NUE 10RD for Tubing Coupling API

Casing Couplings 18 5/8” OD139 PPF, Grade P-110, BTC Connection

COUPLING 2 3/8” J55 EUE 8RD for Tubing Coupling API

COUPLING 2 3/8” L80 EUE 8RD for Tubing Coupling API

COUPLING 2 3/8” P110 EUE 8RD for Tubing Coupling API

[bestarpipe]

OCTG couplings for tubing and casing

Couplings are short lengths of pipe used to connect 2 joints of tubing or casing. They come with painted colour codes on their external surface to indicate their grades.

Couplings are manufactured according to API 5CT and 5B specifications.

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API Tubing Coupling:Specification

Size (Pipe OD) (in)1.900, 2-3/8, 2-7/8, 3-1/2, 4, 4-1/2

Upset

Non Upset

External Upset

GradeJ-55, C-75, L-80, N-80, C-95, P-110

Option

Electro-zinc plated

Phosphorised

API Casing Coupling:Specification

Size (Pipe OD) (in)4-1/2, 5, 5-1/2, 6-5/8, 7, 7-5/8, 8-5/8, 9-5/8, 10-3/4, 11-3/4, 13-3/8, 16, 18-5/8, 20

Threading

Short Round-Thread Casing (STC)

Long Round-Thread Casing (LC)

Buttress Thread Casing (BC)

GradeH-40, J-55, K-55, C-75, L-80, N-80, C-95, AS-95, P-110, L80-13CR