Notes on the use of American Standard oil casing

Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure that the drilling process is carried out and that the entire well operates normally after completion. Several layers of casing are used in each well according to different drilling depths and geological conditions. The casing is cemented after the well is drilled, and unlike tubing and drill pipe, it is not reusable and is a one-time consumable material. Therefore, the consumption of casing accounts for more than 70 percent of all oil well tubing. Casing can be divided into: conduit, surface casing, technical casing and oil layer casing according to usage. There are two types of welded pipe according to the specified wall thickness: ordinary oil casing and thickened oil casing.

Different types of casing used in the oil extraction process: surface petroleum casing protects the drilling well from contamination by shallow water and shallow gas formations, supports the wellhead equipment and maintains the weight of other layers of the casing. Technical oil casing separates the pressure in the different layers to allow proper flow of drilling fluid amounts and to protect the production casing. Enables installation of anti-storm fracture devices, leak prevention devices and tail pipes in drilled wells. Oil Formation Oil casing to move oil and gas out of the reservoir below the surface. It is used to protect the drilling well by layering the drilling mud. Oil casing is typically manufactured with an outside diameter of 114.3 mm to 508 mm.

J55 oil casing is a necessary pipe for drilling oil and gas and needs to have good performance in use. Petroleum casing in different temperature sections selected different temperature control, heating needs to be produced in accordance with a certain temperature, 27MnCrV steel AC1 = 736 ℃, AC3 = 810 ℃, tempering after quenching selected temperature 630 ℃, tempering heating holding time of 50 min. sub-temperature quenching heating temperature is selected between 740-810 ℃. Sub-temperature quenching selected heating temperature 780 ℃, quenching heating holding time 15min; as sub-temperature quenching in the α + γ two-phase zone heating, quenching in the retention of part of the undissolved ferrite state, while maintaining the temperature, toughness can be improved.

Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure the drilling process is carried out and the normal operation of the whole well after completion. Several layers of casing are used in each well depending on the drilling depth and geology. The casing is cemented after the well is drilled, and unlike tubing and drill pipe, it is not reusable and is a one-time consumable material. Therefore, the consumption of casing accounts for more than 70 percent of all oil well tubing. Casing can be classified according to usage: conduit, surface casing, technical casing and oil casing.

Oil casing is the lifeline for maintaining the operation of oil wells. Due to different geological conditions, the downhole stress state is complex, and the combined effects of tensile, compressive, bending and torsional stresses act on the tubular body, which places high demands on the quality of the casing itself. Once the casing itself is damaged for some reason, it may lead to production reduction of the whole well or even scrapping. According to the strength of the steel itself, casing can be divided into different steel grades, i.e. J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Different well conditions and depths require different steel grades. In corrosive environments, the casing itself is required to have corrosion resistance. In places with complex geological conditions, the casing is also required to have anti-crushing properties and anti-microbial erosion.

Oil special pipe is mainly used for oil and gas well drilling and oil and gas transmission. It includes oil drilling pipe, oil casing and oil pumping pipe. Oil drill pipe is mainly used to connect drill collar and drill bit and transmit drilling power. Oil casing is mainly used to support the well wall during the drilling process and after completion to ensure the drilling process and the normal operation of the whole well after completion. The pumping tubing is mainly used to transport oil and gas from the bottom of the well to the surface.

Defects between the length of the L C and the vanishing point of the thread are allowed to extend no deeper than the cone of the thread base diameter or no greater than 12.5% of the specified wall thickness (whichever is greater), but no corrosion products are allowed on the thread surface. Grinding and dressing are permitted to eliminate defects, but grinding and filing are not permitted to eliminate pits. The outer chamfer (65°) is guaranteed to be complete around the 360° circumference of the pipe end, with the chamfer diameter such that the thread root disappears on the chamfered surface rather than on the pipe end, and without a sharp edge. The outer chamfer should be 65° to 70°; the inner chamfer should be 360° full circle and 40° to 50°, and if there is any unchamfered part, the chamfer should be hand filed.

Oil casing is a large diameter pipe that holds the wall or borehole of oil and gas wells in place. The casing is inserted into the borehole and fixed with cement to prevent the borehole from separating the rock formation and collapsing, and to ensure the circulation of drilling mud to facilitate drilling and extraction. Steel grade of oil casing: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Casing end processing forms: short round thread, long round thread, partial trapezoidal thread, special buckle, etc. It is mainly used for oil well drilling to support the well wall during the drilling process and after the completion of the well to ensure the normal operation of the whole well after the drilling process and completion of the well.

The oil industry is an industry that uses a large amount of oil tubing, and oil tubing plays a very important role in the oil industry: the amount of oil tubing used is large and costly, and the potential to save money and reduce costs is huge. The consumption of oil tubing can be projected by the amount of feet drilled each year. According to the specific situation in China, roughly 62kg of oil well pipe is needed for every 1m drilled, including 48kg of casing and 10kg of tubing. a blind groove of the same size as the cut is corroded on the inner wall of the pipe. Drill pipe 3kg, drill collar 0.5kg; 2 the mechanical and environmental behavior of oil pipe has an important impact on the oil industry to adopt advanced technology and increase production and efficiency; 3 oil pipe failure loss is huge, reliability and oil life is significant to the oil industry. [(OD – wall thickness)wall thickness]0.02466=kg/m (weight per meter).

The steel grade used varies by well condition and depth. In corrosive environments, the casing itself is required to have anti-corrosion properties, and API seamless steel pipe is also required to have anti-crushing properties in places with complex geological conditions. The pumping pipe mainly transports oil and gas from the bottom of oil wells to the surface. Threaded connection forms: short round threaded casing (STC); long round threaded casing (LTC) bias trapezoidal threaded casing (BTC); straight connected casing (XC) non-thickened tubing (NU); externally thickened tubing (EU); integral joint tubing (IJ).

API 5CT oil casing,API 5L oil pipeline pipe standard,API 5CT oil casing,API 5L oil pipeline pipe standard,oil casing is made of seamless steel pipe,electric welded steel pipe and hot rolled steel pipe by CNC turning wire. The joint adopts the international advanced pure manganese high-temperature phosphating process, with strong phosphate film bonding, uniform and dense crystallization, high hardness, corrosion resistance and anti-buckling ability. ASTM steel pipe can be divided into different steel grades according to the strength of the steel itself, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc.

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