What is P110 oil casing

P110 oil casing is an important oil drilling equipment, the main equipment also includes a drill, core and casing pipe, drill collar and small-diameter steel pipe and other drilling. Domestic steel casing are all hot rolled or cold drawn with geological drilling steel, steel grade with (DZ), common casing steel grade are DZ40, DZ55, DZ753 species.

1. purposeUsed as oil well drilling pipe.

2. speciesAccording to SY / T6194-96 "oil casing", divided into short thread casing and couplings and long thread casing and coupling two kinds.

3. specifications and appearance quality(1) domestic casing according to SY / T6194-96 regulations, casing length no cut to length, its range 8-13m. But the casing of no less than 6m may be provided, which shall not exceed 20%. (2) the inner and outer surface of the casing shall have no folded, hair pattern, separation, crack, rolled off and scarring. These defects should be completely removed, and the clear depth should not exceed 12.5% of the nominal wall thickness. (3) coupling the outer surface may not have folded, hair pattern, separation, crack, rolled off, scarring and other defects. (4) casing and threaded coupling surface should be smooth, does not allow burr, tear and impact strength sufficient to interrupt threads and other defects in close connection.

4. chemical composition inspection(1) according to SY / T6194-96 regulations. Casing and couplings using the same grade. Sulfur content <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. physical performance test(1) according to SY / T6194-96 regulations. For flattening test (GB246-97) tensile testing (GB228-87) and hydrostatic testing. (2) according to the American Petroleum Institute APISPEC5CT1988 1st edition provides for the hydrostatic test, flattening test, sulfide stress corrosion cracking test, hardness test (ASTME18 or the latest version of the provisions E10), tensile test, the lateral impact test (ASTMA370, ASTME23 and the relevant provisions of the latest version of the standard), grain size determination (ASTME112 latest version or other methods).

6. packingAccording to SY / T6194-96 regulations, domestic casing should be strapped with wire or steel. Each casing pipe and the exposed portion of the threaded couplings should be screwed on the guard ring to protect the threads.

7. OtherAccording to the American Petroleum Institute Standard APISPEC5CT 1988 1st edition, oil casing steel fraction H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P- 110, Q-125 a total of 10 kinds.Casing should be available with threaded and couplings, or by any of the following delivery:Flat end, round thread without coupling or with coupling, buttress thread couplings with or without coupling, direct type thread, special end processing, ring structure.