In-pipe packer for tightness detection of oil casing

A sealing detection and packer technology, which is used in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of different inspection accuracy and air tightness requirements.

Active Publication Date: 2015-10-21
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inspection accuracy and effect of this method are far from the airtightness requirements of oil and casing in deep water and high pressure oil and gas wells. As we all know, the water seal test is only suitable for low pressure and liquid tightness inspections, not suitable for high pressure and gas tightness. test

Method used

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  • In-pipe packer for tightness detection of oil casing

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Embodiment Construction

[0022] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0023] see figure 1 , an in-pipe packer for oil-casing tightness testing, including a main body 12, the main body adopts a vertically symmetrical central axis structure, and a connecting sleeve 11, a piston sleeve 10, a piston shaft 6 and an adjusting sleeve are sequentially symmetrically assembled in the middle of the main body. Set of 5. One end of the body is provided with a locking sleeve 13 for preventing axial movement of the piston shaft when the packer is set, and the other end of the body is provided with a locking head for preventing axial movement of the piston shaft when the packer is set 4. The locking sleeve 13, the locking head 4 and the adjusting sleeve 5 form a double-nut tightening structure to prevent the piston shaft 6 fr...

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Abstract

The invention relates to a pipe interior packer for detecting the sealing property of an oil sleeve; the pipe interior packer is characterized by comprising a body; the middle part of the body is sequentially and symmetrically provided with a connecting sleeve, a piston bush, a piston shaft and an adjusting sleeve; one end of the body is provided with a locking sleeve, and the other end of the body is provided with a locking head; the piston shaft is provided with a rubber sleeve; one end of the body is connected with the locking head which is connected with a hanging head; the hanging head is internally provided with a lifting head connected with a steel wire rope; a spring used for automatically resetting the rubber sleeve is arranged between the piston bush and the piston shaft; and the body is provided with a pressure transmission channel along the axial direction, and the pressure transmission channel is respectively connected with two pressure pipelines. The pipe interior packer can be matched with corresponding detection equipment for use, can be sealed in a sitting way in the oil sleeve and can be used for testing the sealing property by high-pressure gas, so that the problems of gas tightness detection of the existing deep water and high pressure oil-gas well oil sleeve can be effectively solved, and a safe, reliable and convenient detection device is provided for the development service of the deep water and high pressure oil-gas well in China.

Description

technical field [0001] The invention belongs to the technical field of air tightness detection of production pipe strings in oilfield development, and in particular relates to an in-pipe packer for oil casing air tightness detection. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of oil and gas extraction technology, more and more attention has been paid to the exploitation of deep water and high pressure oil and gas well resources, which were previously difficult to exploit. However, the development of deep-water and high-pressure oil and gas wells is different from the development of ordinary wells. It has very strict requirements on the tightness of downhole tubing strings, especially tubing and casing, and the tightness of each threaded thread of the tubing and casing must be checked. [0003] At present, the operation method used by ordinary oil and gas wells to check the tightness of the threaded thread o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12
Inventor 黄毓祥马认琦陈杰刘传刚张玺亮张文倩傅文伟
Owner CNOOC ENERGY TECH & SERVICES
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