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releasable anchor packer

A technology of packer and well sealing, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., and can solve the problem of increased difficulty in unblocking the packer, increasing the difficulty of re-unblocking, and unblocking Plugging operations are complicated and other problems, to achieve the effect of easily destroying cement bridge plugs, reducing the difficulty of anchor release, and saving materials

Active Publication Date: 2017-01-18
牡丹江金恒石油机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After using the existing well sealing packer to seal, all the packers are kept downhole, the cost of sealing is high, and materials are wasted
Moreover, cement bridge plugs can only be installed above the packer. When the cement bridge plug is unblocked again, the drilled and broken cement bridge plug may be destroyed at the same time, making it more difficult to unbolt the packer. The difficulty of plugging makes the unblocking operation more complicated

Method used

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  • releasable anchor packer

Examples

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Embodiment Construction

[0007] like figure 1 As shown, it includes a well sealing device 1 including a central pipe 11, a circlip sleeve 12, several slips 13, a rubber cartridge assembly 14 and a guide head 15, and it also includes a hydraulic device 2 and a pressure guiding core device 3, Hydraulic device 2 is made up of upper joint 21, overcoat 22, upper central pipe 23, central central pipe 24, lower central pipe 25, upper piston one 26, upper piston two 27, upper piston three 28, upper piston four 29, lower piston 30, The upper middle sleeve 31, the middle middle sleeve 32 and the lower middle sleeve 33 are formed. The lower end of the upper joint 21 is axially connected with the upper end of the outer sleeve 22 through external threads, and the upper central pipe 23 is located at the inner upper end of the outer sleeve 22 and connected with the upper end of the upper joint 21 through external threads. The lower end is connected, the upper piston one 26 is located below the upper joint 21 and is ...

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Abstract

The invention relates to an anchor detachable packer. The anchor detachable packer comprises a well sealing device (1), a hydraulic device (2) and a pressure guide core device (3), wherein the lower end of a central pipe (25) under the hydraulic device (2) is provided with outer threads; the pressure guide core device (3) is composed of an upper head (34) and a core pipe (35); a slide sleeve (16) is arranged above a guide head (15) of the well sealing device (1); a shearing pin (17) mounted on the wall of a central pipe (11) is arranged under the slide sleeve (16); a through hole I is formed in the side walls of the guide head (15) and the central pipe (11) above the shearing pin (17); a through hole II is formed in the side wall of the slide sleeve (16) above the through holes I. After the anchor detachable packer is used for blocking, the integral packer is not needed to be retained under a well, blocking cost is low and materials are saved; a cement bridge plug can be arranged under the packer so that the difficulty of deblocking again can be reduced, and a deblocking operation is simple. The upper half section of the well sealing packer can be lifted out of the ground after blocking and the waste of materials are avoided.

Description

technical field [0001] The invention relates to petroleum tools, in particular to a well sealing packer for oil field well sealing operations. Background technique [0002] With the continuous exploitation of my country's oilfields, some oil wells and water wells in the old production areas need to be abandoned and blocked by sealing packers. After the existing well sealing packer is used for sealing, all the packers are left downhole, the cost of sealing is high, and materials are wasted. Moreover, cement bridge plugs can only be installed above the packer. When the cement bridge plug is unblocked again, the drilled and broken cement bridge plug may be destroyed at the same time, making it more difficult to unbolt the packer. The difficulty of plugging makes the unblocking operation more complicated. Contents of the invention [0003] The purpose of the present invention is to provide a packer that does not need to be left in the well after plugging, the cost of pluggin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12E21B33/13
CPCE21B33/12E21B33/13
Inventor 马中原汪文成高风启王大彪周健汪斌
Owner 牡丹江金恒石油机械科技有限公司
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