The casing string in the hole drilling, used to prevent the formation of formation fluid flow and collapse.
The tubing string into the production casing, components of underground reservoir and the ground channel, control of crude oil and natural gas flow.
Seamless steel casing pipe, also known as encasement pipe, is most commonly used in underground construction to protect utility lines of various types from getting damaged
Such damage might occur due to the elements of nature or human activity
Technical specification:
1, Sizes: 4 1/2" - 20"
2, Wall thickness: 0.205" - 0.635"
3, Standard: API 5CT
4, Steel grade: H40, J55, K55, N80, L80, C95, P110
5, Thread: STC, LTC, BTC
6, Length: R3