Recyclable type hydraulic packer

A packer and hydraulic technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve problems such as inability to transmit torque effectively, prevent the risk of loosening, save operation time and cost , the effect of unpacking is simple

Active Publication Date: 2016-07-20
荆州市赛瑞能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for unsealing and recovery, the center pipe is usually connected in the form of an adapter buckle, which cannot effectively transmit torque when the well structure is complex, and there is a safety hazard of tripping

Method used

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  • Recyclable type hydraulic packer
  • Recyclable type hydraulic packer
  • Recyclable type hydraulic packer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The recoverable hydraulic packer includes an inner center pipe 1 , an outer center pipe 2 , a release claw 3 , a bush 4 , a balance joint 5 , an oil drain sleeve 6 , an upper piston 7 , a lower piston 8 and slips 9 . The outer central tube 2 is set on the inner central tube 1, and the inner central tube 1 on the side of the outer central tube 2 is provided with a release claw 3; the inner central tube 1 on the side of the release claw 3 is provided with a bushing 4; the release claw 3 It is threadedly connected with the outer center pipe 2 and the bushing 4 respectively.

[0028] A shearing ring 11 is installed on the inner center pipe 1 on one side of the bushing 4 through the balance joint 5 and the guide ring 10 . A limiting ring 12 is arranged between the shearing ring 11 and the inner central tube 1, and the limiting ring 12 is connected to the shearing ring 11 and the guide ring 10 respectively; the shearing ring 11 is threadedly connected to the guide ring 10; th...

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PUM

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Abstract

The invention relates to a recyclable type hydraulic packer and belongs to the field of oil and gas well operation downhole tools. The packer comprises an inner center pipe, an outer center pipe, a releasing claw, a bushing, a balanced connector, an oil drainage sleeve, an upper piston, a lower piston and a slip. The inner center pipe is sleeved with the outer center pipe. The releasing claw is arranged on one side of the outer center pipe. The bushing is arranged on one side of the releasing claw. A shear ring is installed on one side of the bushing through the balanced connector and a guide ring. The recyclable type hydraulic packer can bear the two-way pressure from the upper portion and the lower portion of the packer; 52 MPa high pressure can be borne by a sealing mechanism; when the slip enters a well and is unblocked and taken out, the slip is pressed through a spring and only stretches out when the cone acting force is applied to the slip under the action of the hydraulic force, and thus the advanced setting risks of a conventional packer can be effectively avoided; the packer is designed by adopting an integrated inner center pipe and can be directly connected with an oil pipe, the number of transfer buckle parts is decreased, the structure can be made more compact, the drift diameter is increased, and meanwhile the buckle disengagement risk of transfer buckles is avoided, so that the cost is reduced.

Description

technical field [0001] The invention relates to a recoverable hydraulic packer, belonging to the field of downhole tools for oil and gas well operations. Background technique [0002] Packers are widely used in oilfield layered water injection, acidizing, fracturing, sand control, channel finding and channel sealing, etc., mainly to achieve the isolation of the annulus between tubing and casing or between tubing and formation. Retrievable packers are divided into two types: mechanical and hydraulic. Due to structural design reasons, mechanical packers use rotating strings to transmit torque. This structure is not suitable for ultra-deep wells and highly deviated wells where torque transmission is difficult. and horizontal wells. Conventional recoverable hydraulic packers generally have the problem of low pressure bearing capacity, and their pressure is generally below 35MPa. Due to the need for unsealing and recovery, the center pipe is usually connected in the form of an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/1295E21B33/126
CPCE21B33/1265E21B33/1295
Inventor 陶风谭显龙李荆州王琼马小平王鲜刘创程市君丁万园
Owner 荆州市赛瑞能源技术有限公司
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