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drag packer

A packer and sealing mechanism technology, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., can solve the problem of packer being stuck by sand, so as to ensure the sealing performance and anti-high pressure performance , the effect of simple operation

Active Publication Date: 2017-01-04
CHINA UNIV OF PETROLEUM (BEIJING) +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another object of the present invention is to propose a dragging packer that solves the problem of the packer being stuck by sand

Method used

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Examples

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Embodiment 1

[0023] This embodiment provides a dragging packer. The up and down positions described herein are for the use state of the dragging packer after entering the oil well. To be precise, the dragging packer The connector position of the device is down.

[0024] The structure of the dragging packer is as follows: Figure 1-Figure 3 As shown, it includes a joint 1 , a reversing mechanism 2 and a sealing mechanism 3 connected sequentially from bottom to top.

[0025] Such as image 3 As shown, the reversing mechanism 2 includes a guide head 21, a righting block 22, a righting block spring 23, a slip 24 and a slip spring 25, the guide head 21 is threaded on the guide head seat 26, the righting block 22 and the righting block spring 23 Installed on the righting block seat 27, the guide head seat 26 and the righting block seat 27 are threaded, the slips 24 and the slip spring 25 are installed on the slip seat 28, and the slip seat 28 and the righting block seat 27 are threaded, the ab...

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Abstract

The invention discloses a packer, which belongs to the technical field of tight oil and gas reservoir exploitation in an oil field and is designed for solving the problems that the existing packer can cause the sand clamping, the setting is unreliable, the goal of completing multi-stage fracturing through one pipe column is difficult to realize, and the like. The packer comprises a joint, a reversing mechanism and a sealing mechanism in sequential connection from bottom to top, wherein the reversing mechanism comprises a guide head, a wiper block, a wiper block spring, a slip and a slip spring; the guide head is connected onto a guide head seat through screw threads; the wiper block and the wiper block spring are arranged on a wiper block seat; the guide head seat and the wiper block seat are connected through screw threads; the slip and the slip spring are arranged on a slip seat; the slip seat and the wiper block are connected through screw threads; the sealing mechanism comprises a rubber tube, a cone body and a center pipe; the rubber tube is sheathed on the center pipe; the center pipe is connected with the cone body through screw threads; and the cone body is connected with the reversing mechanism. The packer has the advantages that the setting and the setting relieving of the packer can be realized through upwards lifting and downwards placing a pipe column conversion rail; the operation is simple; the setting is reliable; and the goal of completing multi-stage fracturing through one pipe column is achieved.

Description

technical field [0001] The invention relates to a special tool for oil and gas well fracturing in an oil field, in particular to a dragging packer. Background technique [0002] With the continuous development of various complex trajectory wells, ultra-long horizontal wells, and sidetracked wells in oil fields, new issues have been proposed for oil well fracturing technology. The existing packers mainly have the following disadvantages in the oil field fracturing process: first, sand bridges are easily formed after fracturing, causing sand jams; second, the setting seal caused by oil pipe pressure fluctuations is unreliable; It is difficult to achieve multi-stage (for example, more than 10 stages) fracturing in one string because of its poor tear resistance. Contents of the invention [0003] An object of the present invention is to provide a drag-type packer with simple operation, reliable setting and multi-stage fracturing in one trip. [0004] Another object of the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127E21B33/129
Inventor 顾岱鸿刘广峰柴崇军刘金超王在强任国富
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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