Basic introduction and performance analysis of p110 petroleum casing

p110 oil casing as oil casing is an important equipment for oil drilling, to our industrial construction and other practical activities to bring many positive impact and role, so what in-depth understanding of its en, small editors small popularization for you.

The basic introduction and performance analysis of p110 oil casing

I. Introduction

(1) The main importing countries of petroleum casing are: Germany, Japan, Romania, Czech Republic, Italy, Britain, Austria, Switzerland, the United States, Argentina, Singapore are also imported. Import

The standard mostly refers to the American Petroleum Institute standard API5A, 5AX, 5AC. steel grade is H-40, J-55, N-80, P-110, C-75, C-95, etc.. The specifications are mainly 139.77.72R-2, 177.89.19R-2, 244.58.94R-2, 244.510.03R-2, 244.511.05R-2, etc.

(2) There are three kinds of lengths specified by API: namely R-1 for 4.88 to 7.62m, R-2 for 7.62 to 10.36m, and R-3 for 10.36m to longer.

(3) Some of the imported goods are marked with the word LTC, i.e. long silk buckle casing.

(4) Imported casing from Japan in addition to the use of API standards, there are a small number of implementation of Japanese factory standards (such as Nippon Steel, Sumitomo, Kawasaki, etc.), steel grades are NC-55E, NC-80E, NC-L80, NC-80HE, etc.

(5) In the claim cases, there have been black buckle, wire buckle damage, tube body folding, broken buckle and thread tightness distance is over poor, joint J value is over poor and other appearance defects and casing brittle crack, low yield strength and other intrinsic quality problems.

II. Types

According to SY/T6194-96 “petroleum casing” is divided into two kinds of short threaded casing and its coupling and long threaded casing and its coupling.

Specification and appearance quality

(1) Domestic casing according to SY/T6194-96, the length of the casing is variable, the range of 8-13 m. But not shorter than 6 m of casing can be provided, the number of not more than 20%.

(2) The internal and external surfaces of the casing shall not have folding, hairline, delamination, cracks, rolling folds and scars. These defects shall be completely removed and the removal depth shall not exceed 12.5% of the nominal wall thickness.

(3) The outer surface of the joint shall not have defects such as folding, hairline, delamination, cracking, rolling, folding and scarring.

(4) The surface of casing and coupling threads shall be smooth, and no burrs, tears and other defects sufficient to interrupt the threads to affect the strength and tight connection are allowed.

III. Chemical composition inspection

(1)According to SY/T6194-96. The same steel grade is used for the casing and its coupling. Sulfur content of 0.045%, phosphorus content of 0.045%.

(2) according to the provisions of GB222-84 to take chemical analysis samples. Chemical analysis in accordance with the provisions of the relevant part of GB223.

(3) American Petroleum Institute ARISPEC5CT1988 1st edition regulations. Chemical analysis according to the new version of ASTME59 sample preparation, chemical analysis according to the new version of ASTME350.

Fourth, physical properties test

(1) According to SY/T6194-96. Do flattening test (GB246-97) tensile test (GB228-87) and hydrostatic test.

(2) According to the American Petroleum Institute APISPEC5CT 1988, 1st edition, hydrostatic test, flattening test, sulfide stress corrosion cracking test, hardness test (ASTME18 or E10 new version of the provisions of the test), tensile test, transverse impact test (ASTMA370, ASTME23 and the relevant standard new version of the provisions of the test), grain size determination (ASTME112 new version or other methods).

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