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Separated layer water-flooding process tubular column capable of being drilled

A technology of pipe string and layered water injection, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc. It can solve the problems of serious scaling and difficulty in unsealing tools, and achieve the effect of saving operating costs

Pending Publication Date: 2020-02-21
FUXIN CITY GASOLINEEUM TOOL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of difficult unsealing of tools in the late stage of water injection in layered water injection wells with severe scaling

Method used

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  • Separated layer water-flooding process tubular column capable of being drilled
  • Separated layer water-flooding process tubular column capable of being drilled

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Embodiment Construction

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0023] like figure 1 , 2 As shown, upper joint-1, positioning sleeve-2, back cap-3, cylinder barrel-4, auxiliary piston-5, connecting sleeve-6, sliding sleeve-7, main piston-8, central tube-9, thrust sleeve -10, ball seat-18, retaining ring-29, spring-30, steel ball I-31, steel ball II-37 form the sealing tool.

[0024] Upper pressure ring-11, lock spring I-12, upper rubber cylinder-13, upper cone I-14, upper slips-15, lower cone I-16, upper rubber cylinder shaft-33, auxiliary piston scissors- 35. The sliding sleeve shear nail-36 forms the upper plugging tool.

[0025] Sealing sleeve-17, block-19, lower main piston-20, lower cylinder liner-21, lower rubber cylinder shaft-22, lower rubber cylinder-23, upper cone II-24, lower slips-25, lower cone Body II-26, setting shear nail-27, and lock spring II-28 form the lower plugging tool.

[0026] The upper...

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PUM

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Abstract

The invention discloses a separated layer water-flooding process tubular column capable of being drilled, which is an underground water-flooding operation tool of the petroleum industry. A ball seat is sleeved in a center tube; a steel ball I is placed in the ball seat; a spring is arranged in a retaining ring; an upper rubber barrel shaft sleeves the center tube; a hand-releasing shear pin II ispositioned between the upper rubber barrel shaft and the center tube; a lock spring I is arranged in a ring slot of the upper rubber barrel shaft; an upper cone I sleeves the upper rubber barrel shaft; an upper slip sleeves the upper rubber barrel shaft; a sealing sleeve sleeves the center tube; a hand-releasing shear pin I is positioned between the sealing sleeve and the center tube; a positioning sleeve is in sleeve connection to a slide sleeve, and is limited by a slide sleeve table shoulder; a shear pin is arranged between the positioning sleeve and the slide sleeve; an upper joint is connected to a connecting sleeve; a cylinder barrel is in sleeve connection to a thrust sleeve, and is limited on an upper joint table shoulder; and a back cap is connected to the upper joint. The separated layer water-flooding process tubular column capable of being drilled solves the problem that tool unsealing is difficult at a water-flooding later stage of a separated layer water-flooding well with severe scale formation.

Description

technical field [0001] The invention belongs to the downhole water injection operation tool of the petroleum industry, which is used for the layered water injection process of scaled vertical wells, inclined wells and horizontal wells, and solves the problems of tool unsealing and injection adjustment difficulties in the later stage of water injection. Background technique [0002] Water injection is one of the main technical means to increase and stabilize production in various oilfields. By injecting high-pressure liquid into the well to supplement formation energy, the oil well can increase production. Because the injection pressure of each water layer is different, it is necessary to use a packer to isolate each layer in the downhole. Layer-specific water injection, the existing technology mostly uses oil pipes to connect multiple packers and water distributors to seal the layers, through the water distributor to inject water into the corresponding intervals, and the adju...

Claims

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Application Information

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IPC IPC(8): E21B43/20E21B43/14E21B33/122
CPCE21B43/20E21B43/14E21B33/122
Inventor 舒明锁赖云飞何晶薛伟
Owner FUXIN CITY GASOLINEEUM TOOL FACTORY
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