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Coiled Tubing

Brief Introduction:

Coiled tubing is also known as flexible tubing, which is a kind of HFW continuous welded tube with high strength and good plasticity. The difference from ordinary tubing is that coiled tubing has no thread connections.

Coiled tuCoiled tubing and the relevant operating equipment are called “Universal Working Machine” which can be classified into down well working string, velocity string and coiled line pipe by uses.

 

Down well working string is mainly used for more than 20 kinds of logging, work over, drilling and completion operations such as gas lift induced spray drainage, well flush and clean-up, plugging solving, wax removal, mud replacement, acidification, salvage, fracturing, etc. Velocity String is mainly applied in drainage production increase of low permeability wells, and also can be directly used as completion string which replaced ordinary tubing. Coiled Line pipe is mainly used for surface gathering pipeline in on-land oil fields and gathering pipeline in offshore drilling platform.

uct Standards

API Spec 5ST

GB/T 34204-2017

Q/CNPC-BG 1023  

API Spec 5LCP

SY/T 6700

Single Length

8000m

Outside Diameter

25.4mm-88.9mm

Wall Thickness

1.91mm-6.435mm

Steel Grade

working string:CT55-CT130

velocity string:HO70-HO80

coiled line pipe by uses:X52C-X90C

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