Drilling pipes China

Drilling pipes

Model No: API certificate
Name: Drilling pipes
Application: land and offshore wells

The drill pipe is a steel pipe with a thread at the tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well.

The purpose of the drill pipe is to transport the drilling mud to the drill bit and raise, lower or rotate the bottom hole device together with the drill bit.

The drill pipe must be able to withstand huge internal and external pressure, twisting, bending and vibration.

In the process of oil and gas extraction and refining, the drill pipe can be used many times.

There are three types of drill pipe: Kell, drill pipe, and Heavy Weight Drill Pipe.

The connection sequence is kelly (one piece) + drill pipe (n piece, determined by the depth of the well) + heavy weight drill pipe (n, determined by the design of the drill tool assembly).

Size pipe OD weight Wall thickness RSC type grade Upset type
No 1 No 2
in lb/ft inch mm lb/ft kg/m in mm / / /
2 3/8 6.65 2.375 60.32 6.26 9.33 0.28 7.11 NC26 E, X, G EU
2 7/8 10.4 2.875 73.02 9.72 14.47 0.362 9.19 NC31 E, X, G, S EU
3 1/2 13.3 3.5 88.9 12.31 18.34 0.368 9.35 NC38 E, X, G, S EU
15.5 3.5 88.9 14.63 21.79 0.449 11.4 NC38, NC40 E, X, G, S EU
4 14 4 101.6 12.93 19.27 0.33 8.38 NC40, NC46 E, X, G, S EU, IU
4 1/2 16.6 4.5 114.3 14.98 22.32 0.337 8.56 NC46, NC50 E, X, G, S EU, IEU
20 4.5 114.3 18.69 27.84 0.43 10.92 NC46, NC50 E, X, G, S EU, IEU
5 19.5 5 127 17.93 26.7 0.362 9.19 NC50, 5 1/2 FH E, X, G, S IEU
25.6 5 127 24.03 35.8 0.5 12.7 NC50, 5 1/2 FH E, X, G, S IEU
5 1/2 21.9 5.5 139.7 19.81 29.52 0.361 9.17 5 1/2 FH E, X, G, S IEU
24.7 5.5 139.7 22.54 33.57 0.415 10.54 5 1/2 FH E, X, G, S IEU
6 5/8 25.2 6.625 168.28 22.19 33.04 0.33 8.38 6 5/8 FH E, X, G, S IEU
27.7 6.625 168.28 24.22 36.06 0.362 9.19 6 5/8 FH E, X, G, S IEU
RSC-旋转台肩式连接(rotary shouldered connection),EU-外加厚(external-upset),IU-内加厚(internal-upset),IEU-内外加厚(internal and external-upset)
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