Bridge type inverted pull down pump
A bridge-type and pump-tube technology, applied in the field of bridge-type inverted pull-down pumps, can solve the problems of eccentric rod and tube wear, small space for system efficiency improvement, and many transmission links, so as to reduce oil production costs, reduce operation safety risks, and eliminate Effects of Stroke Loss
Active Publication Date: 2016-05-11
PETROCHINA CO LTD
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Problems solved by technology
[0002] At present, there are inherent problems in the oil production method of the rod pump of the pumping unit, such as eccentric wear of the rod and tube, many transmission links, and little room for system efficiency improvement.
Method used
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Embodiment
[0011] refer to Figures 1 to 3 Embodiments of the present invention are further described:
[0012] The pull down pump mainly includes upper coupling 1, oil outlet valve cover 2, oil outlet valve 3, oil outlet valve seat 4, valve seat joint 5, coupling collar 6, bridge-type outer pipe 7, screen pipe 8, bridge-type inner pipe 9. Upper outer pipe 10, upper pump barrel 11, upper movable oil inlet valve 12, upper plunger 13, lower movable oil inlet valve 14, lower plunger 15, reducing joint 16, lower pump barrel 17 and lower outer pipe 18;
[0013] The lower end of the upper collar 1 is internally threaded to connect the oil outlet valve cover 2, and the oil outlet valve cover 2 is provided with an oil outlet valve 3 and an oil outlet valve seat 4, and the lower end is internally threaded to connect the valve seat joint 5, and the outer thread is connected to the collar 6. The lower end of the collar 6 is connected to the upper outer pipe 10 through the screen pipe 8, and the l...
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The invention discloses a bridge crossing type inverted pull-drown pump, which is designed for eliminating the eccentric wear and improving the system efficiency by fitting a rodless oil extracting device of an underground linear motor. The pull-down pump mainly comprises an oil outlet valve, a sieve pipe, an upper outer pipe, a reducing joint, a lower outer pipe and the like, wherein a bridge type inner pipe, with the lower end connected to an upper pump cylinder, is fixed in a bridge type outer pipe; an upper plunger is arranged in the upper pump cylinder; upper and lower mobile oil inlet valves are connected into the upper plunger; and the bottom end of the lower mobile oil inlet valve is in threaded connection with a lower plunger. The pull-down pump is combined with the underground linear motor for constructing to realize the oil extraction without needing a sucker rod, so that the problem of incapability of eliminating the eccentric wear of the sucker rod in a directional well is radically solved, the zero transmission from the motor to an oil well pump is realized, the stroke loss can be eliminated, the pump efficiency and the system efficiency are improved, and the operation safety risk is reduced. The pull-down pump is a helpful exploration of transforming a traditional mechanical oil extracting mode, and has an important significance on the reduction of oil extracting costs and the improvement of benefits.
Description
technical field [0001] The invention relates to a bridge-type inverted pull-down pump, which belongs to the technical field of downhole operation tools in the petroleum and natural gas industry. Background technique [0002] At present, there are inherent problems in the oil production method of the rod pump of the pumping unit, such as eccentric wear of the rod and tube, many transmission links, and little room for system efficiency improvement. Contents of the invention [0003] The purpose of the present invention is to provide a bridge-type inverted pull-down pump to eliminate the eccentric wear of the rod tube and improve the system efficiency. [0004] Concrete technical content of the present invention is as follows: [0005] The lower end of the upper coupling of the pull-down pump is internally threaded to connect the oil outlet valve cover, and the oil outlet valve cover is provided with an oil outlet valve and an oil outlet valve seat, and the lower end is inte...
Claims
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IPC IPC(8): F04B47/00
Inventor 杨海涛朱天寿慕立俊曾亚勤黄伟甘庆明李明辛宏张磊韩二涛
Owner PETROCHINA CO LTD