API SPEC 5 ct - 1999 (casing and tubing specification), is the American Petreleum Instiute (hereinafter referred to as "API") compiling and publishing...
API SPEC 5 ct - 1999 (casing and tubing specification), is the American Petreleum Instiute (hereinafter referred to as "API") compiling and publishing of the universal all over the world.
Among them: drilling, casing by the ground surface into as wall lining pipe, the pipe through the coupling between the connection. Main material for grade J55 and N80 and P110 steel, as well as the hydrogen sulfide corrosion resistant C90, T95 and other steel grade. The low grade of steel (J55 and N80) for welded steel pipe. Inserted into the casing pipe: the surface until the oil pipe, the pipe through the coupling between or overall connection. Its role and pumping unit reservoir oil by the tubing to the ground. Main material for J55 and N80 and P110, as well as the hydrogen sulfide corrosion resistant C90, T95 steel grade. The low grade of steel (J55 and N80) for welded steel pipe.
Oil casing is the important equipment in oil drilling, its main equipment include drill pipe, tube and casing, drill collar and small diameter drilling with steel tube and so on. Domestic casing with geological drilling steel after hot rolling and cold drawing, steel grade with "geological" (DZ) said that the commonly used casing steel grade DZ40, DZ55, DZ753 kinds.
1. Use
Used in oil well drilling.
Type 2.
According to SY/T6194-96 "petroleum casing" points short thread casing and coupling and long thread casing and coupling of two kinds.
3. Specifications and appearance quality
(1) according to provisions of SY/T6194-96 domestic casing, casing uncertain feet in length, the range of 8 to 13 m. But not less than 6 m casing can be provided, the amount shall not exceed 20%.
(2) the internal and external surfaces of the casing shall have folded, hairline, delamination, crack, rolling and scarring. These defects shall be completely removed, remove depth shall not exceed 12.5% of the nominal wall thickness.
(3) the coupling surface must not have folded, hairline, delamination, crack, rolling defects such as folding, scarring.
(4) the casing and coupling thread surface should be smooth, there is no burr, tear and enough to make the thread tied to interrupt impact strength and other defects.
4. The chemical composition inspection
(1) according to provisions of SY/T6194-96. The same grade of steel casing and coupling. Sulfur content < 0.045%, phosphorus content < 0.045%.
(2) according to the provisions of the GB222-84 for chemical analysis of samples. According to the relevant part of the GB223 rules for chemical analysis.
(3) the American petroleum institute ARISPEC5CT1988 version 1. Chemical analysis according to the latest version ASTME59 sample preparation, according to the latest version ASTME350 for chemical analysis.
Difference of PSL1 and PSL2(API 5L)
The API 5L has two standards, PSL1 and PSL2, which are very different from each other. I'll talk more about the differences between PSL1 and PSL2.
Production Process of Pipe Fitting
There are many kinds of processing methods for pipe fittings.
The Future of Steel Pipe Development
The future of steel pipe development is looking promising, according to expert analysis and data. The price of carbon steel pipe is predicted to bounce back this year, with China leading the way in increasing steel consumption demands. This is due to a series of government initiatives aimed at stimulating domestic demand, including the construction of affordable housing and infrastructure projects. The demand for structural steel pipe is also on the rise, thanks to state investment in housing and engineering projects. With private investment projects also gaining popularity, the steel pipe market is set to thrive in 2017.
