P110 oil casing is an important oil drilling equipment, the principle gear also features a drill, core and casing pipe, drill collar and small-diameter steel pipe and different drilling. Home steel ca…
P110 oil casing is a vital oil drilling gear, the principle tools additionally features a drill, core and casing pipe, drill collar and small-diameter steel pipe and different drilling. Home steel casing are all sizzling rolled or cold drawn with geological drilling steel, steel grade with (DZ), frequent casing steel grade are DZ40, DZ55, DZ753 species.
Used as oil effectively drilling pipe.
Based on SY / T6194-96 “oil casing”, divided into brief thread casing and couplings and long thread casing and coupling two sorts.
Three. specifications and appearance quality
(1) home casing in keeping with SY / T6194-96 regulations, casing size no lower to length, its vary 8-13m. But the casing of no less than 6m may be supplied, which shall not exceed 20%.
(2) the internal and outer floor of the casing shall don’t have any folded, hair pattern, separation, crack, rolled off and scarring. These defects ought to be completely eliminated, and the clear depth shouldn’t exceed 12.5% of the nominal wall thickness.
(3) coupling the outer surface might not have folded, hair pattern, separation, crack, rolled off, scarring and other defects.
(Four) casing and threaded coupling surface ought to be smooth, does not permit burr, tear and influence strength enough to interrupt threads and different defects in shut connection.
4. chemical composition inspection
(1) in response to SY / T6194-96 rules. Casing and couplings utilizing the same grade. Sulfur content material <0.045%, phosphorus content <0.045%.
(2) according to the provisions of GB222-84 chemical analysis of samples taken. Chemical analysis in accordance with the provisions of the relevant parts of GB223.
(3) American Petroleum Institute ARISPEC5CT1988 1st edition rules: Chemical analysis of sample preparation by ASTME59 latest version, chemical analysis according to the latest version ASTME350.
5. bodily performance test
(1) in response to SY / T6194-96 laws. For flattening check (GB246-ninety seven) tensile testing (GB228-87) and hydrostatic testing.
(2) in keeping with the American Petroleum Institute APISPEC5CT1988 1st edition gives for the hydrostatic test, flattening check, sulfide stress corrosion cracking test, hardness take a look at (ASTME18 or the newest version of the provisions E10), tensile check, the lateral affect check (ASTMA370, ASTME23 and the related provisions of the most recent version of the usual), grain dimension dedication (ASTME112 latest model or other strategies).
In response to SY / T6194-96 regulations, home casing ought to be strapped with wire or steel. Each casing pipe and the exposed portion of the threaded couplings needs to be screwed on the guard ring to protect the threads.
In line with the American Petroleum Institute Customary APISPEC5CT 1988 1st edition, oil casing steel fraction H-40, J-55, Okay-fifty five, N-80, C-75, L-eighty, C-ninety, C-95, P- a hundred and ten, Q-125 a complete of 10 kinds.
Casing should be accessible with threaded and couplings, or by any of the following supply:
Flat end, round thread without coupling or with coupling, buttress thread couplings with or with out coupling, direct sort thread, particular finish processing, ring construction.