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Uniform distribution type sand control device for downhole oil extraction device

A technology of oil production device and sand control device, which is applied to the components of pumping device for elastic fluid, production fluid, earthwork drilling and other directions, can solve problems such as blockage and affect the normal production of oil wells, and achieves safe and reliable use and simple structure. Effect

Inactive Publication Date: 2007-12-05
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used sand removal method is mainly screen filtration. After a period of use, the screen often becomes clogged and affects the normal production of the oil well.

Method used

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  • Uniform distribution type sand control device for downhole oil extraction device

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Effect test

Embodiment Construction

[0012] As shown in the figure, a uniformly distributed sand control device for downhole oil production equipment is mainly composed of a central cyclone and a group of external cyclones uniformly distributed around it. When the oil-water mixture with some sand particles enters the plurality of outer cyclones evenly distributed on the cyclone shell through the multiple small holes 11 on the outer cyclone shell 3, due to the fins 7 of the outer cyclone As a result, the liquid flow rotates and moves downward in the outer cyclone cavity. Due to the high gravity of the sand, under the action of centrifugal force and gravity, the sand rotates and moves downward along the inner wall of the outer cyclone shell, and sinks into the outer annular space of the oil pipe at the bottom of the oil well through the outer sand outlet 4. While the liquid flow rotates and moves downward in the cavity of the outer cyclone, the oil-water mixture entrains some relatively fine sand particles, and is ...

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Abstract

The invention discloses a uniform-distributed sand-proof device used in oil production, which is characterized in that: it is mainly formed by the central cyclone and a group of outer cyclones uniformly distributed around the central one; wherein, the top of outer cyclone is connected to the cyclone chamber of central cyclone; the lower end of central cyclone case has a inner sand outlet; the outer cyclone case has a outer sand outlet; it top via the screw is connected to the case interface; the center and outer cyclones are formed by cyclone case and cyclone pipe; the cyclone leak-off pipe has fins and bottom leak-off holes and the wall of central cyclone has tangential liquid inlet. The invention has simple structure, safe and reliable usage while it can avoid the jam.

Description

technical field [0001] The invention relates to an oil production device in an oil field, in particular to a sand control device installed before the inlet of a downhole oil production pump in an oil well and used for removing or reducing solid particles in the oil-water mixture, that is, sand grains. Background technique [0002] During oil production operations in oil fields, the produced oil-water mixture entrains some solid sand particles into the oil production device. These sand particles are very harmful to equipment such as oil production pumps and should be removed. The currently used sand removal method is mainly screen filtration. After a period of use, the screen often becomes clogged and affects the normal production of the oil well. Therefore, properly solving the problem of sand control and sand removal during oil production has become one of the most important issues to maintain the safe operation of oil production equipment and ensure continuous normal prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/08F04B53/20
Inventor 王景昌
Owner DALIAN UNIV