Packer, oil production system, oil production pump and oil production method

Abstract

The packer provided by the present invention includes a packer tube and a piston; a through hole is opened along the axis of the packer tube, one end of the through hole is the liquid level end and the other end is the pump body connection end, and a single pump is set at the liquid level end of the through hole to the valve. The one-way valve conducts one-way from the liquid surface end to the connection end, and an annular cavity is opened along the axial direction of the isolation tube. One end of the annular chamber communicates with the liquid surface end, the other end of the annular chamber communicates with the connection end of the pump body, and the piston is slidably arranged in the annular chamber along the radial direction of the annular chamber. The annular chamber is divided into a first chamber and a second chamber, the first chamber communicates with the liquid surface end, and the other end of the annular chamber communicates with the discharge chamber to be connected to the pump body. Meanwhile, the invention also provides an oil recovery system, an oil recovery pump and an oil recovery method. When the surface liquid supply pump supplies liquid to the downhole hydraulic pump through the oil pipe, it can balance the pressure of the upper and lower chambers of the liquid discharge cylinder through the floating piston set in the packer, which solves the problem of the upper and lower chambers of the pump liquid discharge cylinder. Unbalanced force causes the problem of low oil recovery efficiency.

Description

technical field [0001] The invention relates to the application field of crude oil extraction, in particular to a packer, an oil extraction system, an oil extraction equipment and an oil extraction method. Background technique [0002] In the development of oilfields in recent years, the well depth has been continuously increasing, which makes the beam pumping unit unable to adapt. Existing rodless pumps, such as electric submersible centrifugal pumps and linear motor oil well pumps, all need cables to go into the well, are expensive to build, and have the disadvantages of increasing pump repair costs, which cannot meet the needs of oil exploitation. Contents of the invention [0003] Embodiments of the present invention provide a packer, an oil production system, an oil production equipment, and an oil production method, which are used to solve at least one of the above technical problems. [0004] One embodiment of the present invention provides a packer, including a pa...

AI Technical Summary

Problems solved by technology

[0002] In the development of oilfields in recent years, the well depth has been continuously increasing, which makes the beam pumping unit unable to adapt

Existing rodless pumps, such as electric submersible centrifugal pumps, linear motor oil well pumps, etc., all need cables to go into the well, the cost is high, and the pump repair costs increase, etc., which cannot meet the needs of oil exploitation.

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