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Restriction choke rubber sleeve deliquescent agent dropping device

A technology of dispensing device and dissolving agent, which is applied in the direction of mining fluid, wellbore/well parts, earthwork drilling and mining, etc. It can solve problems such as breaking, fishing failure, and high friction between the well wall and the rubber tube, so as to avoid waste, Convenient construction and efficient dissolution effect

Active Publication Date: 2015-04-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during on-site fishing, the rubber tubes of some chokes cannot be retracted, so that the friction between the well wall and the rubber tubes is too large, and the fishing wire is broken, resulting in fishing failure.

Method used

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  • Restriction choke rubber sleeve deliquescent agent dropping device

Examples

Experimental program
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Effect test

Embodiment

[0009] refer to figure 1 Embodiments of the present invention are further described:

[0010] The device includes a main connector 1, an axial sealing ring 2, a sealing rubber ring 3, a nut 4, a spring 5, a cylinder body 6, a sealing ring 7, a pin 8 and a bottom cover 9;

[0011] The upper end of the connector 1 is connected with a steel wire, and the lower end is externally threaded with a cylinder 6 and sealed by an axial sealing ring 2 . The cylinder wall of the cylinder 6 is provided with an injection thread hole that connects the nut 4 and is sealed by the sealing rubber ring 3. The inner wall step at the bottom of the cylinder 6 is connected to the bottom cover 9. The pin 8 is fixed and sealed by the sealing ring 7. A spring 5 is arranged inside the cylinder body 6 , the upper end of the spring 5 is connected to the bottom surface of the connecting head 1 , and the lower end is connected to the bottom cover 9 .

[0012] The working process of this device is as follows...

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PUM

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Abstract

The invention discloses a restriction choke rubber sleeve deliquescent agent dropping device which is designed for achieving smooth salvage of the restriction choke. The upper end of a connector of the device is connected with a steel wire; the lower end is connected with the sleeve body and sealed by an axial sealing ring. The upper portion of the wall of the sleeve body is provided with an injection screw hole which is connected with a nut and sealed by a rubber sealing ring. The inner wall at the bottom end of the sleeve body is stepped and connected with a bottom cap which is fixed by a radial pin inserted in the step; and the bottom cap is sealed by a sealing ring. A spring is arranged inside the sleeve body; the upper end of the spring is connected with the bottom surface of the connector, the lower end is connected with the bottom cap. The device can closely contact with the restriction chock, effectively dissolve the rubber sleeve, avoid waste of the deliquescent agent, and increase the salvage efficiency and success rate. The device is simple in structure, convenient in construction, safe and environment-friendly.

Description

technical field [0001] The invention relates to a dissolving agent injecting device for a throttle rubber cartridge, which belongs to the technical field of natural gas well exploitation. Background technique [0002] In the process of natural gas exploitation, downhole chokes are usually placed in the wellbore in order to reduce pressure, throttling and limit production. Sulige gas field widely uses downhole chokes of slip type. The downhole choke is operated by steel wire, delivered to the predetermined position of the wellbore, fixed by the slips on the choke and the oil pipe, and the inner wall of the oil pipe and the annular space of the choke are sealed by the rubber tube. Sometimes, according to the demand of production, the restrictor needs to be salvaged to adjust the gas production at the wellhead of the gas well. However, during on-site fishing, the rubber tubes of some restrictors cannot be retracted, so that the friction between the well wall and the rubber tub...

Claims

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Application Information

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IPC IPC(8): E21B43/12
CPCE21B23/00E21B43/12
Inventor 赵彬彬付钢旦白晓弘田伟杨旭东杨亚聪李旭日贾友亮惠艳妮李耀德崔丽春杨丹丹
Owner PETROCHINA CO LTD
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