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Packer

A technology of packer and packing rubber cartridge, which is applied in the directions of sealing/isolation, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems affecting the cementing operation and so on, so as to improve the reliability and safety, Easy processing, safe and efficient use

Active Publication Date: 2017-09-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this lifting or lowering operation will prompt the packer to cut off the shear nails in advance, which will cause the packer to be set in advance and affect the subsequent cementing operations

Method used

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] Such as figure 1 As shown, the packer 10 according to the present invention includes a substantially circular center pipe 1 , an outer cylinder 2 and a packing assembly 8 that are sleeved outside the center pipe 1 in sequence from top to bottom in the axial direction. The upstream end of the central tube 1 (i.e. figure 1 top shown) can be used to attach a running tool, while the downstream end can be used to attach a liner hanger. The outer cylinder 2 can slide axially and acts on the packing assembly 8 to complete the setting operation. The outer cylinder 2 includes a spacer 2b connected to the outer cylinder body 2a, and a shear nail 201 and an anti-retraction spring 202 arranged on the outer cylinder body 2a. Wherein, the running tool and the liner hanger are well known to those skilled in the art, and will not be described in detail here.

[0024] The central...

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PUM

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Abstract

The invention relates to a packer, which includes a central pipe, including a receiving hole formed on the peripheral wall of the central pipe, and a radially movable block is arranged in the receiving hole; it is sleeved outside the central pipe and can move along the axis The inner wall of the outer cylinder is engaged with the clamping block to prevent the outer cylinder from sliding in the axial direction; the locking piece arranged in the central tube is used to limit the radial inward movement of the clamping block; The component is configured to act on the locking member to release its restriction on the clamping block, thereby allowing the clamping block to move radially inward, and releasing the clamping relationship between the outer cylinder and the clamping block. The packer according to the present invention can effectively prevent it from completing the setting operation ahead of schedule.

Description

technical field [0001] The invention relates to the technical field of oil drilling, solidification and well completion engineering, in particular to a packer capable of preventing early setting. Background technique [0002] The packer is a common equipment in the field of oil drilling, solidification and well completion engineering. It is used to isolate the annulus between the pipe string and the wellbore or between the pipe string and the casing to prevent the fluid in the annulus from going up and down. Flow, so as to ensure that the subsequent process can be carried out smoothly. [0003] At present, there are various types of packers with different functions, and almost all of them have relatively large packing capacity. However, these packers are likely to be set in advance, which will affect the subsequent construction and even lead to the failure of the oil well. Normally, the packer will not be set in advance, but in some special cases, it is very easy to set in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127
Inventor 张瑞阮臣良马兰荣崔晓杰李夯郭朝辉
Owner CHINA PETROLEUM & CHEM CORP