Automatic variable displacement lifting device
A lifting device and variable displacement technology, which is applied to the parts of the pumping device for elastic fluid, the parts of the variable displacement pump, the machine/engine, etc. It can achieve the effect of automatically changing the displacement
Active Publication Date: 2019-05-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0003] The existing variable displacement lifting device requires manual intervention when changing the displacement, or adjusting the length of the sucker rod, or lifting and releasing the polished rod, which is not convenient for implementation
[0004] After searching, no variable lift pump similar to this application was found
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[0024] The detailed description and technical content of the present invention are described below with the drawings, but the drawings are only for reference and description, and are not used to limit the present invention.
[0025] An automatic variable displacement lifting device, including a pump barrel, a basic plunger, and an outer plunger, the outer plunger is set outside the basic plunger, and the outer plunger is provided with at least one stage, that is, it is set on the basic The jacket plunger outside the plunger is regarded as the first-stage jacket plunger, and the jacket plunger that is enclosed within the first-stage jacket plunger is the second-stage jacket plunger, and so on; A first-stage snap ring is arranged between the outer casing plungers, a last-stage snap ring is arranged between the pump barrel and the last-stage outer casing plunger, and corresponding intermediate-stage snap rings are also arranged between the outer casing plungers of each level. The...
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The invention discloses an automatic variable displacement lifting device comprising a pump cylinder, a basic plunger and at least one stage of outer sleeve plunger. The exterior of the basic plungeris sleeved with the outer sleeve plungers, the outer sleeve plunger with which the basic plunger is sleeved is the first-stage outer sleeve plunger, the outer sleeve plunger with which the first-stageouter sleeve plunger is sleeved is the second-stage outer sleeve plunger, and so on. A first-stage clamping ring is arranged between the basic plunger and the first-stage outer sleeve plunger, a last-stage clamping ring is arranged between the pump cylinder and the last-stage outer sleeve plunger, and corresponding intermediate-stage clamping rings are arranged between the different stages of outer sleeve plungers. The displacement of the lifting device is automatically adjusted according to oil well supply situations, and manual intervention is not needed; and a concentric nested structure is adopted, the length of a working main body is approximate to that of a conventional oil well pump, and conveying and installation are convenient and fast.
Description
technical field [0001] The invention relates to the technical field of mechanical oil recovery for oil and gas field development, in particular to an automatic variable displacement lifting device. Background technique [0002] In the process of oil field production, some oil wells have a high liquid production rate at the beginning of pumping, and the liquid production rate gradually decreases as the production progresses, such as heavy oil wells that are transferred to pumping after steam huffing and puffing, and large displacement is required after fracturing or acidizing measures Oil wells with flowback but low production during production, etc. This type of well needs rapid liquid drainage in the early stage of pumping, and requires a large-displacement lifting device for production. However, the liquid production rate decreases in the middle and late stages of well opening, and a smaller-displacement lifting device is required to optimize production efficiency. Ordina...
Claims
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IPC IPC(8): F04B47/00F04B53/14F04B53/16
Inventor 智勤功朱泽军姜东杜玮暄徐建礼周娜刘丙生张中慧高综启肖萍
Owner CHINA PETROLEUM & CHEM CORP