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Tubing is divided into plain tubing (NU), Upsetting tubing (EU) and integral joint tubing (IJ). A flat oil pipe means that the pipe end is directly threaded without a thickening and is provided with a coupling. Thickened tubing means that both ends are thickened after being externally threaded and threaded with a coupling. The integral joint oil pipe means that one end passes through the inner thickening of the external thread of the car, and the other end passes through the outer thickening of the internal thread of the car, and the direct connection does not have a coupling.
The tubing is a pipeline that transports crude oil and natural gas from the reservoir to the surface after drilling is completed to withstand the pressure generated during the mining process.
The role of petroleum tubing: extraction of oil and gas: After the oil and gas well is finished and cemented, the oil pipe is placed in the casing of the oil layer to extract oil and gas to the ground. Water injection: When the pressure in the well is not enough, water is injected into the well through the oil pipe. Steam injection: In the process of heavy oil thermal recovery, steam is input to the well with an insulated oil pipe. Acidification and fracturing: In order to improve the production of oil and gas wells in the later stage of well drilling, it is necessary to input acidification and fracturing medium or solid material to the oil and gas layer, and the medium or solidified material is transported through the oil pipe.
Specification range: Outer diameter: 42.16 MM - 114.3 MM (1.66"--4 1/2") Wall thickness: 3.56-16mm (2.3ppf-26.1ppf)
Material: H40, J55, K55, N80-1, N80-Q, L80-1, L80-9Cr, L80-13Cr, P110, Q125 etc
Execution standards: API 5CT, GB, ISO11960, GOST
Button type: NU, EU, IJ
Length: R1, R2, R3
Detection: NDT etc related rules of API 5CT and 5B
Type: Seamless steel pipe
TUBING PIPES | |||||
STANDARD: API SPEC 5CT | |||||
Outside Diameter Specified(mm) | Nominal Weight Threads & Coupling | Steel Grade | Wall Thickness (mm) | Type of Thread | |
Ib/ft | NU | EU | |||
73.02(2 7/8" ) | 6.40 | H, C, N, L, P | 5.51 | YES | |
6.50 | H, C, N, L, P | 5.51 | YES | ||
7.80 | C, N, L, P | 7.01 | YES | ||
7.90 | C, N, L, P | 7.01 | YES | ||
8.60 | C, N, L, P | 7.82 | YES | ||
8.70 | C, N, L, P | 7.82 | YES | ||
9.45 | L, C | 8.64 | YES | ||
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