P110 oil casing is an important oil drilling gear, the primary tools additionally features a drill, core and casing pipe, drill collar and small-diameter steel pipe and other drilling. Home steel ca…

Cutting plate machineP110 oil casing is a crucial oil drilling tools, the main tools additionally features a drill, core and casing pipe, drill collar and small-diameter steel pipe and other drilling. Domestic steel casing are all sizzling rolled or chilly drawn with geological drilling steel, steel grade with (DZ), widespread casing steel grade are DZ40, DZ55, DZ753 species.

1. goal
Used as oil effectively drilling pipe.

2. species
In line with SY / T6194-96 “oil casing”, divided into short thread casing and couplings and long thread casing and coupling two kinds.

3. specifications and appearance high quality
(1) home casing in line with SY / T6194-96 rules, casing length no minimize to length, its vary eight-13m. However the casing of no lower than 6m could also be offered, which shall not exceed 20%.
(2) the inside and outer floor of the casing shall haven’t any folded, hair sample, separation, crack, rolled off and scarring. These defects must be completely removed, and the clear depth should not exceed 12.5% of the nominal wall thickness.
(Three) coupling the outer surface might not have folded, hair pattern, separation, crack, rolled off, scarring and different defects. United
(4) casing and threaded coupling floor must be smooth, doesn’t allow burr, tear and impact energy adequate to interrupt threads and different defects in shut connection.

Four. chemical composition inspection
(1) according to SY / T6194-96 rules. Casing and couplings using the identical 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. bodily efficiency take a look at
(1) in keeping with SY / T6194-96 laws. For flattening check (GB246-97) tensile testing (GB228-87) and hydrostatic testing.
(2) in response to the American Petroleum Institute APISPEC5CT1988 1st edition gives for the hydrostatic take a look at, flattening take a look at, sulfide stress corrosion cracking test, hardness test (ASTME18 or the most recent model of the provisions E10), tensile take a look at, the lateral affect take a look at (ASTMA370, ASTME23 and the related provisions of the latest model of the usual), grain dimension determination (ASTME112 newest version or other methods).

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

external half coil heating reflects kettle7. Other
In response to the American Petroleum Institute Normal APISPEC5CT 1988 1st version, oil casing steel fraction H-40, J-55, Ok-fifty five, N-eighty, C-75, L-eighty, C-90, C-ninety five, P- one hundred ten, Q-125 a total of 10 sorts.
Casing should be accessible with threaded and couplings, or by any of the following delivery:
Flat finish, round thread with out coupling or with coupling, buttress thread couplings with or with out coupling, direct kind thread, special end processing, ring construction.

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