Supply 6-5/8 "Grade L80 Range 2 pin * box casing
Oil Pipe Co., Ltd. Tianjin Dali Pu
Standard: API 5CT
Material: J55, K55, N80, L80, P110, Q125
Buckle type: BTC, LTC, STC, VAM TOP.
Diameter: 4 1 / 2 "-20" (114.3mm-508mm)
Wall thickness: 5.21mm-16.13mm
Casing is important to oil drilling equipment, and its main equipment including drill pipe, casing tube and core, drill collar and drilling with small diameter steel pipe and so on. Domestic steel casing to geological drilling by the hot-rolled or cold drawn made steel with a "geological" (DZ), said common casing steel grade has DZ40, DZ55, DZ753 species. Uses for oil well drilling.
2 types of
By SY/T6194-96 "casing" sub-thread casing and coupling the short and long thread casing and coupling two.
3 Specifications and appearance quality
(1) made by SY/T6194-96 provisions casing, casing length is not cut to length, the range 8-13m. But not less than 6m of the casing can provide, their number shall not exceed 20%.
(2) internal and external surface of the casing may have folded, hair pattern, separation, cracks, rolled off and scarring. These deficiencies should be completely removed, clear the depth shall not exceed 12.5% ??of the nominal wall thickness.
(3) the outer surface of the coupling may have folded, hair pattern, separation, cracks, rolled off, scarring and other defects.
(4) threaded coupling sleeve and the surface should be smooth, does not allow burr, tear and impact strength enough to thread interrupt and close connectivity of other defects.