Combined type jet perforating device

A combined, jet technology, applied in the production of fluids, drilling with liquid/gas jets, wellbore/well components, etc., can solve the problems of jetting tool wear, jetting surface damage, etc. Efficiency, the effect of improving effective utilization

Pending Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the hydraulic jet fracturing technology is applied, the jet backflow during the working process of the conventional jet tool is easy to cause damage to the jet surface, resulting in serious wear of the jet tool

Method used

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  • Combined type jet perforating device
  • Combined type jet perforating device
  • Combined type jet perforating device

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] figure 1 A combined jet perforating device according to one embodiment of the present invention is schematically shown.

[0032] in such as figure 1 In the illustrated embodiment, the combined jet perforating device according to the invention comprises a body 10 . The body 10 is cylindrical, and the inner cavity is used for circulating high-pressure liquid. At least one straight jet nozzle 30 and at least two inclined jet nozzles 20 are arranged on the body 10 . Wherein, the jetting direction of the straight jet nozzle 30 is perpendicular to the central axis of the body 10 . The spraying direction of the inclined jet nozzle 20 is not perpendicular to the central axis of the body 10 and is biased toward the direction of the straight jet nozzle 30 . Two inclined jet nozzles 20 are arranged symmetrically on both sides of the direct-flow nozzle in the axial directio...

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Abstract

The invention relates to a combined type jet flow perforating device which is used for treating hard rocks and stratums in an exploitation process of natural gas and the like and comprises a body in acylindrical shape, at least one direct flow nozzle disposed on the body, and at least two inclined jet nozzles arranged on the body, wherein the inclined jet flow nozzles with opposite inclined directions are symmetrically arranged on two sides of the direct flow nozzle. A reverse flow of the inclined jet flow nozzle is mixed with a direct flow before being sprayed to the surface of the perforating device, so that the reverse flow is reduced, the damage of the jet reverse flow to the spraying tool is reduced, and the service life of the perforating device is prolonged.

Description

technical field [0001] The invention relates to a combined jet perforating device, which belongs to a hydraulic jetting device, and is especially used for treating hard rocks and formations in the exploitation process of natural gas and the like. Background technique [0002] With the increasing shortage of oil and gas resources in my country, the development of low-permeability unconventional natural gas resources such as coalbed methane and shale gas is imminent. When exploiting these types of natural gas resources, hydraulic jet fracturing units are often required to treat the hard rock and formations. Hydrojet fracturing is a new type of hydraulic fracturing technology that integrates multiple processes such as hydraulic sandblasting, hydraulic fracturing, and hydraulic isolation. Compared with conventional hydraulic fracturing, hydraulic jet fracturing equipment can accurately create fractures through coiled tubing hydraulic injection, and avoid the compaction damage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/11E21B7/18
Inventor 仲冠宇冯江鹏孔令军鲍洪志王钧赵向阳
Owner CHINA PETROLEUM & CHEM CORP
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