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A hydraulic automatic pressure reduction device

A hydraulic automatic, high-pressure technology, applied in the direction of wellbore/well valve device, production fluid, wellbore/well components, etc., can solve the problem of large back pressure at the wellhead, reduce the load of the rod string, and improve the efficiency of the mechanical mining system , the effect of preventing liquid backflow

Active Publication Date: 2018-03-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the oil field developed by cluster well groups due to the large terrain fluctuation. The problem of large wellhead back pressure caused by height difference

Method used

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  • A hydraulic automatic pressure reduction device

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Experimental program
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Effect test

Embodiment 1

[0022] In order to overcome the large terrain fluctuations, the oilfields developed by cluster well groups, after the wellbore lifting equipment lifts the production fluid from the bottom of the well to the surface, a single oil pipeline is used to transport the oil. For the problem of high wellhead back pressure, this embodiment provides a method such as figure 1 The hydraulic automatic pressure reduction device shown includes an upper joint 12, a cylindrical shell 1, a lower joint 13, and a control box 5. The cylindrical shell 1 includes a channel 2, a hydraulic cylinder A4, a hydraulic cylinder B9, and a limit sensor 3 , piston 8, check valve A10, check valve B11, one end of the channel 2 communicates with the upper joint 12, and the other end communicates with the hydraulic cylinder B9 through the check valve B11, and one end of the hydraulic cylinder B9 communicates with the hydraulic cylinder B9 through the check valve A10. The lower joint 13 is communicated, and the oth...

Embodiment 2

[0027] This embodiment provides a figure 1 The hydraulic automatic pressure reduction device shown includes an upper joint 12, a cylindrical shell 1, a lower joint 13, and a control box 5. The cylindrical shell 1 includes a channel 2, a hydraulic cylinder A4, a hydraulic cylinder B9, and a limit sensor 3 , piston 8, check valve A10, check valve B11, one end of the channel 2 communicates with the upper joint 12, and the other end communicates with the hydraulic cylinder B9 through the check valve B11, and one end of the hydraulic cylinder B9 communicates with the hydraulic cylinder B9 through the check valve A10. The lower joint 13 is communicated, and the other end is communicated with the hydraulic cylinder A4. The hydraulic cylinder A4 is provided with a piston 8. The piston 8 includes a left side and a right side. The left side of the piston 8 is in the hydraulic cylinder A4, and the right side of the piston 8 is connected to the hydraulic pressure. Cylinder B9, limit senso...

Embodiment 3

[0031] This embodiment provides a figure 1 The hydraulic automatic pressure reduction device shown includes an upper joint 12, a cylindrical shell 1, a lower joint 13, and a control box 5. The cylindrical shell 1 includes a channel 2, a hydraulic cylinder A4, a hydraulic cylinder B9, and a limit sensor 3 , piston 8, check valve A10, check valve B11, one end of the channel 2 communicates with the upper joint 12, and the other end communicates with the hydraulic cylinder B9 through the check valve B11, and one end of the hydraulic cylinder B9 communicates with the hydraulic cylinder B9 through the check valve A10. The lower joint 13 is communicated, and the other end is communicated with the hydraulic cylinder A4. The hydraulic cylinder A4 is provided with a piston 8. The piston 8 includes a left side and a right side. The left side of the piston 8 is in the hydraulic cylinder A4, and the right side of the piston 8 is connected to the hydraulic pressure. Cylinder B9, limit senso...

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PUM

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Abstract

The invention provides a hydraulic automatic pressure drop and back pressure device, which includes an upper joint, a cylinder casing, a lower joint, and a control box. The cylinder casing includes a channel, a hydraulic cylinder A, a hydraulic cylinder B, a limit sensor, a piston, and a check valve. A. Check valve B, one end of the channel is connected with the upper joint, the other end is connected with the hydraulic cylinder B through the check valve B, one end of the hydraulic cylinder B is connected with the lower joint through the check valve A, and the other end is connected with the hydraulic cylinder A, the hydraulic pressure There is a piston in the cylinder A, the piston includes the left and right sides, the left side of the piston is in the hydraulic cylinder A, the right side of the piston is connected to the hydraulic cylinder B, the hydraulic cylinder A is provided with limit sensors at both ends, and the outside of the cylinder shell is provided with a control box , and the control box is connected to the limit sensor through a wire connection. The application of the invention effectively solves the problem of large wellhead back pressure caused by terrain height difference in oil well exploitation, and is safe and environmentally friendly, costs are reduced, and oil well exploitation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the research field of low-permeability water injection development oilfields, in particular to a hydraulic automatic pressure reduction device. Background technique [0002] At present, in order to simplify the gathering and transportation process, reduce the occupied area, and reduce the development cost of the main low-permeability water injection development oilfields in China, most of them adopt cluster well group development (multiple oil wells and water wells are arranged in one well pad). The ground is collected and transported to the pressurization point or combined station through a single pipeline. In this context, due to the fluctuation of the terrain and the large altitude difference, the crude oil needs to overcome the potential energy of the drop during the process of gathering and transporting, resulting in the pressure of the gathering pipeline and the wellhead of the oil well. Higher (the pressure inside the tu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/20E21B34/02
Inventor 李大建周志平甘庆明陆梅辛宏王百刘涛李亚洲韩二涛郭靖张岩
Owner PETROCHINA CO LTD