Perforation completion method adopting hydraulic jetting to directly penetrate cement sheaths and rock

A technology of hydraulic jetting and cement sheath, which is applied in drilling with liquid/gas jet, earth-moving drilling, wellbore/well components, etc. The effect of penetrating depth and improving the efficiency of hydraulic jetting

Inactive Publication Date: 2019-04-02
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of low mechanical drilling efficiency and high economic cost of existing univ

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  • Perforation completion method adopting hydraulic jetting to directly penetrate cement sheaths and rock
  • Perforation completion method adopting hydraulic jetting to directly penetrate cement sheaths and rock
  • Perforation completion method adopting hydraulic jetting to directly penetrate cement sheaths and rock

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Example Embodiment

[0025] The following further describes the new technology of the present invention for directly penetrating the cement ring and the rock of the oil and gas reservoir by using the hydraulic jet in combination with the drawings and specific embodiments.

[0026] Such as figure 1 As shown, the technology of the present invention mainly uses soluble aluminum-based metal to dissolve the hole-forming casing in the downhole to form a hole, determine the opening of the casing by an automatic positioning device, and send the lowered high-pressure hose into the opening of the casing. The ground pressurization device injects water to pressurize the high-pressure hose, and the high-speed water jet generated by it penetrates the cement ring and oil and gas reservoir rocks.

[0027] The realization of new metals that use hydraulic jets to directly penetrate the cement ring and oil and gas reservoir rocks requires the following steps:

[0028] (1) Dissolve the soluble aluminum-based metal into a ho...

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Abstract

The invention discloses a perforation completion method adopting hydraulic jetting to directly penetrate cement sheaths and rock. According to the perforation completion method, through a sleeve adopting soluble aluminum-based metal dissolving for hole forming and an automatically-controlled positioning device, hydraulic jetting is conducted to penetrate the cement sheaths and the rock. Accordingto the perforation completion method adopting hydraulic jetting to directly penetrate the cement sheaths and the rock, perforation can be conducted without a perforating bullet of an initiating explosive device, or mechanical drilling can be conducted without cardan joints, the advantages of large hole diameter and deep penetrating can be achieved, and the perforation cost is lowered greatly.

Description

technical field [0001] The invention relates to the technical field of well completion and perforation, in particular to a perforation and completion method in which hydraulic jetting directly penetrates the cement sheath and rocks. New technology for direct penetration into the cement sheath and rock. Background technique [0002] The new technology of directly penetrating the cement sheath and rock by hydraulic jet is the key technology to connect the reservoir rock and wellbore of oil and gas reservoirs. At present, in the process of oil production and completion using hydrojet technology, firstly, the universal joint in a gyroscope is used to mechanically drill the oil casing, and then the hydrojet technology is used to penetrate the cement sheath and rock. However, using the universal joint in the gyroscope to mechanically drill the oil casing has the disadvantages of difficulty in applying pressure to the universal joint, low mechanical drilling efficiency, small dril...

Claims

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Application Information

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IPC IPC(8): E21B7/18E21B29/02
CPCE21B7/18E21B29/02
Inventor 咸玉席卢德唐
Owner UNIV OF SCI & TECH OF CHINA
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