OCTG Casing pipe for Oil and Gas
Casing Specifications Levels Length
What is OCTG casing pipe
Oil country tubular goods (OCTG) is a family of seamless rolled products consisting of drill pipe, casing and tubing subjected to loading conditions according to their specific application.
Casing pipe lines the borehole. It is subject to axial tension by its dead weight, internal pressure by fluid purging, and external pressure by surrounding rock formations. Casing is particularly exposed to axial tension and internal pressure by the pumped oil or gas emulsion.
Tubing is pipe through which the oil or gas is transported from the wellbore. Tubing segments are generally around 30 ft [9 m] long with a threaded connection on each end.
OCTG CASING PIPE Main Specifications
Commodity name : OCTG oil tubing and casing pipe
standard : API Spec 5CT
grade : k55 N80-1 N80-Q L80-1 j55 p110
T&C : STC LTC BTC XC and premium connection
Surface Treatment : Rust-proof black painting or as clients request
Marking : Standard marking or according to clients request
size range :
tubing OD： 2-3/8 inch 4-1/2 inch WT： 4.24mm16mm
casing OD： 4-1/2 inch 20 inch WT： 5.21mm——22.22mm
length :
tubing R1 (6.10m-7.32m). R2(8.53m~9.75m) R3(l 1 58m~l 2.80m)
casing R1 (4.88m—7.62m), R2(7.62m—10.36m), R3(l 0.36m~l 4.63m)
Application : Casing pipe is widely used for fastening oil and gas well wall or borehold .with bigger diameter Than tubing, including surface casings .technical casings and oil layer casings.
We manufacture casing pipes from all steel grades described in API 5CT. For a detailed overview of the properties and special applications of each of these grades.
API 5CT casing couplings, namely:
- Buttress thread coupling (BTC)
- Short round thread coupling (STC)
- Long round thread coupling (LTC)
We also provide premium casing connections.
The most common casing specifications are listed here. Others steel grades, nominal weights, and connections are available on request.
- Product specification levels: PSL1, PSL2, PSL3
- Pipe lengths: R1, R2, R3
4-1/2” Casing
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 4-1/2 in | 9.5 ppf (lb/ft) | J55 · K55 · M65 | STC |
| 4-1/2 in | 10.5 ppf (lb/ft) | J55 · K55 · M65 | STC · BTC |
| 4-1/2 in | 11.6 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 4-1/2 in | 13.5 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 4-1/2 in | 15.1 ppf (lb/ft) | P110 | LTC · BTC |
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 5 in | 11.5 ppf (lb/ft) | J55 · K55 · M65 | STC |
| 5 in | 13 ppf (lb/ft) | J55 · K55 · M65 | STC · LTC · BTC |
| 5 in | 15 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 5 in | 18 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 5 in | 21.4 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 5 in | 23.2 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 5 in | 24.1 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 5-1/2 in | 14 ppf (lb/ft) | J55 · K55 · M65 | STC |
| 5-1/2 in | 15.5 ppf (lb/ft) | J55 · K55 · M65 | STC · LTC · BTC |
| 5-1/2 in | 17 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 5-1/2 in | 20 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 5-1/2 in | 23 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
Diámetro Externo | Peso Nominal | Grados | Conexiones |
|---|---|---|---|
| 6-5/8 in | 20 ppf (lb/pie) | J55 · K55 · M65 | STC · LTC · BTC |
| 6-5/8 in | 24 ppf (lb/pie) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 6-5/8 in | 28 ppf (lb/pie) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 6-5/8 in | 32 ppf (lb/pie) | L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 7 in | 20 ppf (lb/ft) | J55 · K55 · M65 | STC |
| 7 in | 23 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 | STC · LTC · BTC |
| 7 in | 26 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 7 in | 29 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 7 in | 32 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 7 in | 35 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
| 7 in | 38 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | STC · LTC · BTC |
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 7-5/8 in | 26.4 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 | STC · LTC · BTC |
| 7-5/8 in | 29.7 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 7-5/8 in | 33.7 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 7-5/8 in | 39 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 7-5/8 in | 42.8 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 7-5/8 in | 45.3 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 7-5/8 in | 47.1 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 8-5/8 in | 24 ppf (lb/ft) | J55 · K55 · M65 | STC |
| 8-5/8 in | 28 ppf (lb/ft) | M65 | STC |
| 8-5/8 in | 32 ppf (lb/ft) | J55 · K55 · M65 | STC · LTC · BTC |
| 8-5/8 in | 36 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 | LTC · BTC |
| 8-5/8 in | 40 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 8-5/8 in | 44 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
| 8-5/8 in | 49 ppf (lb/ft) | L80 · R95 · N80 · C90 · T95 · P110 | LTC · BTC |
9 5/8″ Csing
| OD mm | Ib/ft | Grade | W.T | short | long | buttress |
| 244.48(9 5/8″) | 32.30 | H | 7.92 | YES | ||
| 36.00 | H, J, K | 8.94 | YES | YES | YES | |
| 40.00 | J, K, C, L, N | 10.03 | YES | YES | ||
| 43.50 | C, L, N, P | 11.05 | YES | YES | ||
| 47.00 | C, L, N, P, Q | 11.99 | YES | YES | ||
| 53.50 | C, L, N, P, Q | 13.84 | YES | YES |
10-3/4” Casing
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 10-3/4 in | 40.5 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · BTC |
| 10-3/4 in | 45.5 ppf (lb/ft) | J55 · K55 · M65 | STC · BTC |
| 10-3/4 in | 51 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · BTC |
| 10-3/4 in | 55.5 ppf (lb/ft) | M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · BTC |
| 10-3/4 in | 60.7 ppf (lb/ft) | C90 · T95 · P110 | STC · BTC |
| 10-3/4 in | 65.7 ppf (lb/ft) | C90 · T95 · P110 | STC · BTC |
11-3/4” Casing
| OD mm | Ib/ft | Grade | W.T | short | long | buttress |
| 298.45(11 3/4″) | 42.00 | H | 8.46 | YES | ||
| 47.00 | J, K, M | 9.53 | YES | YES | ||
| 54.00 | J, K, M | 11.05 | YES | YES | ||
| 60.00 | J, K, M, L, N, C, P, Q | 12.42 | YES | YES |
Outside Diameter | Nominal Weight | Grades | Connections |
|---|---|---|---|
| 13-3/8 in | 54.5 ppf (lb/ft) | J55 · K55 · M65 · C90 · T95 · P110 | STC · BTC |
| 13-3/8 in | 61 ppf (lb/ft) | J55 · K55 · M65 | STC · BTC |
| 13-3/8 in | 68 ppf (lb/ft) | J55 · K55 · M65 · L80 · R95 · N80 · C90 · T95 · P110 | STC · BTC |
| 13-3/8 in | 72 ppf (lb/ft) | C90 · T95 · P110 | STC · BTC |
13-3/8” Casing
| OD mm | Ib/ft | Grade | W.T | short | long | buttress |
| 339.7(13 3/8″) | 48.00 | H | 8.38 | YES |
| 54.50 | J, K | 9.65 | YES | YES |
| 61.00 | J, K | 10.92 | YES | YES |
| 68.00 | J, K, C, L, N, P | 12.19 | YES | YES |
| 72.00 | C, L, N, P, Q | 13.06 | YES | YES |
16” Casing
| OD mm | Ib/ft | Grade | W.T | short | long | buttress |
| 406.40(16″) | 65.00 | H | 9.53 | YES |
| 75.00 | J, K, M | 11.13 | YES | YES |
| 84.00 | J, K, M | 12.57 | YES | YES |
18-5/8” Casing
| OD mm | Ib/ft | Grade | W.T | short | long | buttress |
| 473.08(18 5/8″) | 87.50 | H, J, K, M | 11.05 | YES | YES | YES |
20” Casing
Diámetro Externo | Peso Nominal | Grados | Conexiones |
|---|---|---|---|
| 20 in | 94 ppf (lb/pie) | J55 · K55 · M65 | STC · LTC · BTC |
| 20 in | 106.5 ppf (lb/pie) | J55 · K55 · M65 | STC · LTC · BTC |
| 20 in | 133 ppf (lb/pie) | J55 · K55 | STC · LTC · BTC |
