A kind of drainage device of reverse circulation liquid flooding oil production screw pump
A screw pump, reverse circulation technology, applied in pump components, rotary piston/oscillating piston pump components, machines/engines, etc., can solve problems such as excessive torque, achieve less leakage, reduce starting torque, and achieve empty load start effect
Inactive Publication Date: 2016-03-09
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0005] Purpose of the present invention: In order to overcome the problem of excessive torque when the reverse circulation liquid drive oil production screw pump is stopped and started with full load, a discharge device for the reverse circulation liquid drive oil production screw pump is specially provided
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[0020] The present invention is not limited by the following implementation examples, and specific implementation manners can be determined according to the technical solutions of the present invention and actual conditions. Combine below figure 1 The present invention is described below. The positional relationship of up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.
[0021] Such as figure 1 As shown, the upper part of the upper joint 1 is connected to the oil pipe, and the upper joint 1 and the lower joint 7 are connected with a cone buckle. The lower part of the lower joint 7 is connected to the motor joint 9 with a tapered buckle, and a jacket 8 is arranged outside the lower joint 7, and the jacket 8 and the lower joint 7 are threaded.
[0022] Such as figure 1 As shown, the upper joint 1 and the lower joint 7 drill the center hole, the upper end of the center hole is reamed, the valve seat 5 is installed in the reaming...
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The invention relates to a discharging device of a reverse-circulating liquid-driving oil extraction screw pump. The discharging device can enable liquid in an oil tube and annular liquid to be discharged to a stratum after the pump stops, so that the no-load starting of the screw pump is realized, and starting torque of the screw pump is greatly reduced. The technical scheme is as follows: upper overflowing holes are axially formed in an upper joint and a lower joint, the upper joint and the lower joint are connected through a cone buckle, and a clamp cover is arranged at the outer part of the lower joint; valve seats are mounted in the centers of the upper joint and lower joint, a fixed sleeve is mounted at the upper end of each valve seat, and a seal head is mounted at the upper end of each fixed sleeve; a valve element is mounted in each fixed sleeve, the cone surface of each valve element is tightly pressed on the corresponding valve seat, and a compressed spring is arranged at the lower end of each valve element; a radial through hole is formed in the lower end of each fixed sleeve, and an inner hole and a radial through hole are formed in the lower end of each seal head; radial through holes are formed in the positions, close to the radial through holes in the lower ends of the seal heads, of the upper joint and the lower joint in a drilling manner, and a radial through hole is formed in the position close to the radial through hole in the fixed sleeve, of the upper joint in the drilling manner; a discharging hole is formed in the lower joint. Through the sealing manner of an oil extraction cone valve, the sealing pressure is high, and the discharging device can be used for oil extraction in deep wells.
Description
technical field [0001] The invention relates to a discharge device of a screw pump for reverse circulation liquid driving oil recovery. Background technique [0002] For deep wells, directional wells, horizontal wells and other oil wells with complex well structures, high viscosity fluids, sandy, waxy, and severe scaling, downhole hydraulically driven screw pumps are more effective than conventional rod well pumps and electric submersible pumps. There are many advantages. The downhole hydraulically driven screw pump can be lowered below the kickoff point. By adjusting the properties of the injection medium, it is relatively easy to solve the problems of high viscosity, sand, wax, and scaling in the produced fluid that affect the normal production of the oil well. The downhole system of the reverse circulation hydraulically driven screw oil production pump consists of setting a packer in the annulus of the tubing and casing, and power fluid enters from the annulus between th...
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IPC IPC(8): F04C15/00
Inventor 梁政何虹钢叶哲伟李双双张杰郭全袁冲
Owner SOUTHWEST PETROLEUM UNIV