A submersible electric reciprocating pump huff and puff oil production device

A technology of oil extraction device and reciprocating pump, which is applied in pump, production fluid, earthwork drilling and other directions, can solve the problems of high safety and environmental protection risk, low construction efficiency, etc., and achieve the effect of high degree of automation, improvement of maintenance-free period, and improvement of economic benefits.

Active Publication Date: 2018-02-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will inevitably determine the need for frequent tripping and tripping during multiple throughput cycles, resulting in low construction efficiency and high safety and environmental risks

Method used

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  • A submersible electric reciprocating pump huff and puff oil production device
  • A submersible electric reciprocating pump huff and puff oil production device
  • A submersible electric reciprocating pump huff and puff oil production device

Examples

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Effect test

Embodiment 1

[0020] see figure 2 and image 3 , the present invention provides a submersible electric reciprocating pump huff and puff oil recovery device, including an automatic downhole water injection switch 6 and an oil submersible electric reciprocating pump for switching between water injection and oil production channels; wherein the upper end of the downhole automatic water injection switch 6 has a liquid outlet 9 It is connected with the oil pipe 4, and its lower end liquid inlet 10 is connected with the oil outlet of the upper end of the submersible electric reciprocating pump through the oil pipe 4.

[0021] The downhole automatic water injection switch 6 includes four functional components of a downhole power supply, a control circuit, a drive motor and a mechanical switch located in its working cylinder 11; wherein the downhole power supply is electrically connected to the drive motor and the control circuit, and the control circuit is electrically connected to the drive moto...

Embodiment 2

[0025] On the basis of Embodiment 1, the submersible electric reciprocating pump includes a pull-down oil well pump 7, a linear motor 8 and a submersible cable 5; wherein the lower end of the pull-down oil well pump 7 is connected to the upper end of the linear motor 8, and the two are composed of Rodless pump oil production system; the upper end of the pull-down oil well pump 7 is connected to the lower end of the downhole automatic water injection switch 6; the submersible cable 5 is respectively connected to the pull-down oil well pump 7 and the linear motor 8 and leads to the outside of the wellhead.

[0026] The pull-down oil well pump used in the submersible electric reciprocating pump adopts the working mode of pulling the plunger down to discharge liquid, which ensures that the motor mover is in a stretched state when it is stressed, and effectively avoids partial wear of the mover. The liquid inlet of the oil well pump is located on the upper end of the linear motor, a...

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Abstract

The invention belongs to the technical field of mechanical oil production and particularly provides a huff-and-puff oil production device with an electric submersible reciprocating pump. The huff-and-puff oil production device comprises an underground automatic water injection switch (6) for realizing water injection and oil production channel switching and an electric submersible reciprocating pump, wherein a liquid outlet (9) in the upper end of the underground automatic water injection switch (6) is connected with an oil pipe (4), and a liquid inlet (10) in the lower end of the underground automatic water injection switch (6) is connected with an oil outlet in the upper end of an electric submersible reciprocating pump through the oil pipe (4). The huff-and-puff oil production device is free of repeatedly tripping and has the characteristics of simple and convenient operation flow, high construction efficiency, safety, environment friendliness, low risk and the like as comparison with the traditional huff-and-puff oil production process. In addition, due to the adoption of an electric submersible reciprocating pump (a linear motor) device adopted in a lifting way, underground driving link is omitted, the eccentric wear of pipe poles is eliminated, the maintenance-free period of an oil well is prolonged, the huff-and-puff oil production device is suitable for a well with low liquid quantity, and the economic benefit can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of mechanical oil recovery, in particular to a submersible electric reciprocating pump huff and puff oil recovery device. Background technique [0002] The water injection huff and puff oil production technology is to inject water into the production well when the formation pressure drops and the production is very low, and then shut down the well for a certain period of time, relying on the self-absorption of capillary force and the replacement of oil in the matrix, and using the pressure drop of the well to make The replacement oil is produced together with part of the injected water, which is an effective method for developing small oil reservoirs without energy supplementation to enhance recovery. So far, this technology has been applied in some domestic oil fields and has achieved certain economic benefits, and has a prospect of further application. Most of the water injection huff and puff production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/20E21B43/00F04B47/00
CPCE21B43/128E21B43/20F04B47/00
Inventor 刘天宇甘庆明庞洁周志平黄伟张磊杨海涛辛宏魏韦呼苏娟
Owner PETROCHINA CO LTD
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