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A Downhole Hydraulic Control Device

A control device and hydraulic technology, which is applied in wellbore/well valve devices, wellbore/well parts, sealing/isolation, etc., can solve the problems of long construction period, no pressure at the wellhead, high cost, etc., and shorten the construction period , reduce construction cost, and facilitate construction

Active Publication Date: 2020-01-21
SHANDONG BOSAITE PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of oil well exploitation, the formation pressure in individual blocks is high, and there is overflow at the wellhead, and the wellhead needs to carry out construction operations with pressurized equipment or use hydraulic pressure to kill the well; 1) The killing fluid needs to be dense, which has a certain 2) The use of wellhead pressurized equipment is costly and the construction period is long; 3) None of the existing tools can achieve no pressure at the wellhead when the oil pipe is lowered and the sucker rod and oil pipe are pulled out

Method used

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  • A Downhole Hydraulic Control Device
  • A Downhole Hydraulic Control Device
  • A Downhole Hydraulic Control Device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: with reference to attached figure 1 , a kind of downhole hydraulic control device mentioned in the present invention, its technical scheme is: include upper joint 1, internal and external communication channel 2, open shear nail 5, outer cylinder 6, central pipe 7, close shear nail 10, lock ring 11, Liquid inlet channel 12, closing sleeve 13, fixed ball seat 18, steel ball 19, floating ball seat 20, spring 21, lower joint 23, the upper and lower ends of the outer cylinder 6 are respectively movably connected to the upper joint 1 and the lower joint 23, The middle and lower parts of the upper joint 1 are provided with six sets of internal and external communication channels 2, through which the internal and external communication channels 2 are connected to the central pipe 7 in the upper joint 1, and the upper middle part of the central pipe 7 and the upper joint 1 are connected by opening shears. The nail 5 is connected, the bottom of the central tube 7 c...

Embodiment 2

[0035] Embodiment 2, the downhole hydraulic control device mentioned in the present invention, differs from Embodiment 1 in that the middle and lower part of the upper joint 1 is provided with three sets of internal and external communication channels 2, through which the internal and external communication channels 2 communicate with each other. To the central tube 7 in the upper joint 1, in addition, the steel ball 19 is replaced by a ceramic ball, which has the advantages of corrosion resistance and wear resistance, can increase the time of repeated use of the product, and prolong the service life.

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Abstract

The invention relates to a downhole hydraulic control device. According to the technical scheme, the downhole hydraulic control device is characterized in that the upper-middle portion of a central pipe and an upper joint are connected through opening shear pins, and the bottom of the central pipe is matched with a steel ball; the upper portion of the steel ball and a fixed ball seat are in contact seal, the lower portion of the steel ball and a floating ball seat are in contact seal, and the lower portion of the floating ball seat is fixed to a step of an inner cavity of a lower joint througha spring; the upper portion of the fixed ball seat makes contact with a closing sleeve; the closing sleeve is placed on the inner wall of an outer cylinder, the outer wall of the closing sleeve is connected with the inner wall of the outer cylinder through closing shear pins, and the inner wall of the closing sleeve is movably connected with the central pipe through a locking ring; and a liquid inlet channel is formed in the position, located on the lower portions of the closing shear pins, of the outer cylinder. The downhole hydraulic control device has the beneficial effects that the technique is simple, construction is convenient, the construction period is shortened, and the construction cost is reduced; wellhead no-pressure operation can be achieved, and under-pressure operation equipment or well kill operation is not needed; a hydraulic opening and closing mode is adopted, so that safety and reliability are achieved; and blowout can be prevented through matching of the downholehydraulic control device with other tools.

Description

technical field [0001] The invention relates to a control device in the process of oil production in an oil field, in particular to a downhole hydraulic control device. Background technique [0002] In the process of oil well exploitation, the formation pressure in individual blocks is high, and there is overflow at the wellhead, and the wellhead needs to carry out construction operations with pressurized equipment or use hydraulic pressure to kill wells; 1) The killing fluid needs to be dense, which has a certain 2) The use of wellhead pressurized equipment is costly and the construction period is long; 3) None of the existing tools can achieve no pressure at the wellhead when the oil pipe is lowered and the sucker rod and oil pipe are pulled out. Contents of the invention [0003] The object of the present invention is to provide a downhole hydraulic control device for the above-mentioned defects in the prior art. The present invention realizes pressure-free operation at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/10
CPCE21B34/10
Inventor 任岩岩杨鹏飞商延兵李海波
Owner SHANDONG BOSAITE PETROLEUM TECH CO LTD