Fishable linear motor reciprocating pump

A technology of linear motors and reciprocating pumps, which is used in the fields of horizontal wells and eccentric wear wells, downhole reciprocating pumps, directional wells, inclined wells, mechanical oil production wells, and reciprocating pumps. It can solve problems such as extrusion and cable damage, and achieve The effect of reducing workload, reducing operating expenses, and reducing operating and maintenance costs

Inactive Publication Date: 2007-01-24
中国石油化工股份有限公司河南油田分公司石油工程技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Operators and technicians engaged in workover know that due to the influence of well inclination and azimuth changes, the cable is easy to be squeezed with the casing and tubing during the downhole or pull out process, which can easily lead to cable damage

Method used

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  • Fishable linear motor reciprocating pump
  • Fishable linear motor reciprocating pump
  • Fishable linear motor reciprocating pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Example: in figure 1 Among them, casing pipe (1) outer diameter is 139.7 millimeters or 177.8 millimeters, is essential in the oil well. The oil pipe (3) has an outer diameter of 88.9 millimeters and an inner diameter of 75.9 millimeters or an outer diameter of 73 millimeters and an inner diameter of 62 millimeters, and a length of 1120 meters. The lower end of the oil pipe (3) is connected to the fishable linear motor reciprocating pump of the present invention. The cable (2) is connected to the winding of the linear motor stator (27) through the annular space between the sleeve pipe (1) and the oil pipe (3), and drives the motor mover (26) to move up and down. The fishable linear motor reciprocating pump of the present invention is mainly divided into three parts from the appearance, the reciprocating pump (7), the anchor sealing device (8) and the linear motor (9). The anchoring and sealing device (8) plays an anchoring and sealing role between the reciprocating pu...

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Abstract

The reciprocating pump in use for oil spring is composed of cable, a pump, anchoring sealing arrangement, linear motor, and oil pipe. Linear motor is cylinder type permanent magnet linear synchro motor. Motor is composed of stator and mover. Stator is a winding, and mover is a permanent magnet. Through connecting rod, mover of linear motor is connected to plunger of reciprocating pump. Reciprocating pump is positioned at up part of the linear motor. The anchoring sealing arrangement plays function of fixation and seal. Through release drum, oil well pump and inner core of linear motor are seated on sealed drum of the anchoring sealing arrangement, and are possible to be picked out through junk basket, but cable can remain under well. The invention crates new structure of reciprocating pump, and solves difficulties that it must pick cable up or put cable down at same time when reciprocating pump is picked up or put down.

Description

technical field [0001] The invention relates to a downhole reciprocating pump used in oil exploitation, in particular to a downhole reciprocating pump driven by a linear motor. The utility model belongs to the field of mechanical oil recovery, and is suitable for mechanical oil recovery wells, especially for deviated wells, directional wells, horizontal wells and eccentric wear wells. Background technique [0002] At present, there have been reports and patent applications on the application of linear motors in oil wells to directly drive reciprocating pumps. Such as "electric submersible permanent magnet linear reciprocating pump" patent publication number CN 1563715A; "a plunger type oil well pump driven by a linear motor" patent publication number CN 1587708A; "Electric pump oil recovery device" is just a few examples. The application of linear motors in oil wells to drive reciprocating pumps is a good way to save energy, reduce the area occupied by pumping units, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B47/06F04B17/04E21B43/00
Inventor 佘梅卿查振国王新志乔荣娜杨玉山
Owner 中国石油化工股份有限公司河南油田分公司石油工程技术研究院
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