Hanging type oil layer protection packer

A technology for oil layer protection and packer, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of polluted reservoir, oil and gas layer dead, hot wash fluid leaking into the formation, etc. Achieve the effect of meeting well flushing requirements, preventing entry into the formation, and flexible and convenient structure conversion

Inactive Publication Date: 2010-06-23
新疆石油管理局采油工艺研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In normal hot washing and wax removal operations, hot washing liquid will often leak into the form

Method used

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  • Hanging type oil layer protection packer
  • Hanging type oil layer protection packer

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Embodiment Construction

[0014] The present invention is not limited by the following embodiments, and specific implementations can be determined according to the technical solution and actual conditions of the present invention.

[0015] The present invention will be further described below in conjunction with examples:

[0016] The specific application of the best embodiment of the present invention is as follows: When the pipe string is thrown away for construction, the tail pipe, the suspended oil layer protection packer, and the tubing are connected in order from bottom to top, and they are smoothly dropped into the well. After the column is in place, lift the forward-turning tubing to set the packer, and then throw the ball from the tubing. After the ball is in place, press 5-10MPa and lift with pressure. If the pressure is released, the packer is lost and hung in the sleeve. On the tube. Raise the string up and down the tubing string to complete the well. When fishing is needed, first raise the pu...

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Abstract

The invention relates to a packer, in particular to a hanging type oil layer protection packer, which belongs to a packer particularly suitable for the underground oil layer production of low-pressure wells or water-sensitive oil reservoirs. The hanging type oil layer protection packer comprises a back-off sub, a rotation prevention key, a screw, an upper joint, a slide sleeve, a shear pin, a press cap, a sealing pad, a center pipe, a lining sleeve, a leather cup type rubber tube, a cone body, a slips assembly and a lower joint, wherein a groove is formed on the inner side of the upper part of the upper joint, the upper end of the slide sleeve is inserted into the back-off sub, the slide sleeve is fixed on the upper joint, the upper joint is connected with the press cap, the cone body is sheathed on the leather cup type rubber tube and is directly connected with the lining sleeve, and the lining sleeve, the leather cup type rubber tube, the cone body and the slips assembly are sheathed on the center pipe. The hanging type oil layer protection packer has a reasonable and compact structure, can be operated without hands, and can also be operated with hands, the structural conversion is flexible, the self sealing type rubber rube has reliable sealing, a flow discharge passage is designed in the tool structure, and the pumping generated in the pipe column dismounting process can be avoided. The construction working procedure is convenient, the oil layer can be protected, and the well flushing and oil extraction requirements can be met.

Description

1. Technical Field [0001] The invention relates to a packer, which is a suspended oil layer protection packer, which is particularly suitable for downhole oil layer protection in low-pressure wells or water-sensitive oil reservoirs. 2. Technical background [0002] With the development of oil fields, it is becoming more and more difficult to develop low-pressure wells and water-sensitive reservoirs. In normal hot washing and wax removal operations, hot washing liquid often leaks into the formation and pollutes the reservoir. In severe cases, the oil and gas strata will die. 3. Summary of the invention [0003] The purpose of the present invention is to provide an oil layer protection packer, which overcomes the above-mentioned shortcomings of the prior art, simplifies the construction process, and satisfies the requirements of well cleaning, oil production, and testing of the fluid level. [0004] The technical scheme of the present invention is realized by the following measures: ...

Claims

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Application Information

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IPC IPC(8): E21B33/126
Inventor 袁新生孙新贾洪革
Owner 新疆石油管理局采油工艺研究院
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