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Large orifice releasing packer

A packer, large-diameter technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc. Through problems such as passage, small inner diameter, etc., the effect of large plugging span, flexible plugging span and large internal diameter can be achieved.

Inactive Publication Date: 2008-04-23
欧连贵 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the technical defects of the existing packer with small plugging span and small internal diameter, after the 51 / 2″ oil well casing is sealed, the 27 / 8″ tubing string cannot pass through the packer, this paper The invention provides a packer with large span, large internal diameter, simple structure, convenient setting and reliable operation, which can seal casing damage parts and water outlet layers at will. During construction of 51 / 2″ oil well casing, The packer does not need to be pulled out, and the 27 / 8" tubing can pass through the packer. It is more widely used in the 7" oil well casing. It is a large-diameter packer that can work downhole for a long time

Method used

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  • Large orifice releasing packer

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Embodiment Construction

[0009] exist figure 1 In the shown embodiment, the central pipe 2 has external thread and drilled holes; cylinder head 4, cylinder head 35 and cylinder head 44 have internal and external threads; setting pipe 6 has grooves and drilled holes One end of the car has external serrated thread, and the other end has external thread; self-locking sleeve 8 and self-locking sleeve 30 are drilled with holes, the car has grooves and internal serrated thread, and the inner serrated thread is milled in equal parts vertically below; Piston 9, piston 29, piston 39 are drilled with holes, and tapping has an internally threaded hole, and the inner and outer circles have grooves; Center pipe 25 has external threads, and is drilled with holes; Self-locking pipe 31 has internally threaded holes, and the car There are external sawtooth buckle threads; the setting pipe 36 is drilled with holes and grooves, and the car has external threads; the support pipe 40 is opened with grooves, the upper end h...

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Abstract

The great diameter and great span back-off packer as one water shut-off and pendent tool for oil well consists of one loading assembly and one packer assembly mainly. After the loading assembly and the packer assembly are lowered to the required depth and the well head is set, clear water is pumped to pressurize, the piston in the loading assembly pushes the sealing and anchoring unit in the packer assembly via the shearing pin to anchor and lock. Then, the loading assembly is separated from the packer assembly automatically. The present invention has great shut-off span, great inner diameter, stable sealing, firm anchoring and other advantages.

Description

Technical field [0001] The invention relates to a downhole tool used in oil production wells for oil and water well casing damage plugging and layered exploitation, especially for arbitrarily plugging casing damage parts and sealing production layers. When pulling out the string during construction, the packer does not need to be pulled out, and the φ73mm tubing can pass through the packer. It is a large-diameter packer with a large plugging span and a large inner diameter of the packer. Background technique [0002] Once the casing in the upper part of the oil layer is damaged due to various reasons, changing the casing and repairing leaks is a complex and expensive project with low success rate and high risk. However, due to the structure of the existing packer, the plugging span is small and the internal diameter of the packer is small. After setting the 51 / 2″ oil well casing, the 27 / 8″ tubing string cannot Pass through the packer, therefore, cannot meet the needs of fie...

Claims

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Application Information

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IPC IPC(8): E21B33/128
Inventor 欧连贵
Owner 欧连贵
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