Processing technology of ceramic-plating pump cylinder of gas-proof oil well pump suitable for CO2 flooding
A processing technology and oil pump technology, which is applied in the field of ceramic coating gas-proof oil pump barrel processing technology, can solve problems such as life damage, and achieve the effects of good wear resistance, simple process operation and uniform coating.
Inactive Publication Date: 2016-04-13
PETROCHINA CO LTD +1
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Problems solved by technology
[0002] Anti-gas well pumps are currently available for CO 2 It is a better lifting method to drive gas-liquid than oil wells, but due to CO 2 The medium in the wellbore of the oil displacement well is mostly sand-containing, scale-containing, and weakly acidic corrosion. Long-term exposure to this medium environment will seriously damage its lifespan
Method used
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[0014] Specific embodiments: The following provides embodiments of the present invention in conjunction with the drawings:
[0015] a. When using this method on site, for the cylinder 2 of the CYFQB-T-32 gas-proof oil well pump, first take 40Gr carbon structural steel as the base material of the pump cylinder 2, and then perform pickling, lubrication, cold drawing, Heat treatment, straightening, and opaque chromium bottom layer covering treatment, after processing, the outer diameter of the pump barrel 2 is φ45mm, the wall thickness is 13mm, and the length of the pump barrel 2 is 3575mm;
[0016] b. Degrease, remove burrs and rust inside and outside the pump barrel 2, then place the pump barrel 2 on the fixed bracket 4 and clamp it with the centrifuge 1;
[0017] c. Put the ceramic powder 32.6%Fe 2 O 3 , 23.4% Al, 11.2% CrO 3 , 7.5%Ni, 19%Ti, 6.3%B 4 C is put into the inner wall of the pump barrel 2, and the centrifuge 1 is turned on. After the rotation is stable, the centrifugal hig...
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Abstract
The invention relates to the technical field of oil production engineering and belongs to a processing technology of a ceramic-plating pump cylinder of a gas-proof oil well pump suitable for CO2 flooding. The objectives of the design of the invention are to solve the problem that the inner wall of the pump cylinder of the gas-proof oil well pump in a high vapor-liquid-ratio CO2 flooding oil well is seriously corroded and worn and to prolong the service life of the gas-proof oil well pump. The processing technology is realized by carrying out a centrifugal high-temperature self-propagating technology on ceramic powder on the inner wall of the pump cylinder 2 of the gas-proof oil well pump. The ceramic powder, in a high-temperature molten state, in the pump cylinder 2 is thrown onto the inner wall of the pump cylinder 2 through a centrifuge, and a composite pump cylinder 2 with a ceramic lining 3 is formed. After integral cooling, through the honing of a honing machine, the whole ceramic plating layer is at a thickness of 3mm (as stated in the description) and at a hardness higher than HV1200. The wear resistance, scale resistance and corrosion resistance are great. The pump cylinder is mainly used in the CO2 flooding high vapor-liquid-ratio oil well and has the advantages of being wear-resistant, scale-resistant, corrosion-resistant and the like.
Description
Technical field [0001] The invention relates to the technical field of oil extraction engineering, and belongs to a kind of 2 The processing technology of the pump barrel of the gas-proof oil pump with ceramic coating. Background technique [0002] The gas-proof oil pump is currently suitable for CO 2 It is a better way to lift high gas liquids than oil wells, but because of CO 2 The media in the wellbore of oil flooding wells is mostly sand-containing, scale-containing and weakly acidic. Long-term exposure to this medium environment causes serious damage to its life. The gas-proof oil well pump is mainly composed of lengthened short connection, pump barrel, fixed valve assembly, plunger, and traveling valve assembly. The service life of the oil well pump is determined to a large extent by the durability of the pump barrel-plunger pair. 70% of the failures in use are caused by the wear, scale and corrosion of the pump barrel-plunger pair. CO 2 The common sand, scale, and corrosi...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B22F7/04B22F3/23
CPCB22F7/04B22F3/23
Inventor 周万富师国臣孙延安王国庆江威高宇王新民赵云龙李骥楠
Owner PETROCHINA CO LTD