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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
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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 universal joints for petroleum casing, and provide a new technology for directly penetrating cement sheath and oil and gas reservoir rocks by hydraulic jetting

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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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Embodiment Construction

[0025] In the following, the new technology for directly penetrating the cement sheath and oil and gas reservoir rocks by means of hydraulic injection will be further described in conjunction with the accompanying 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 to form holes in the downhole, and the opening of the casing is determined by an automatic positioning device, and the lowered high-pressure hose is sent into the opening of the casing. The surface pressurization device is injected with water to pressurize the high-pressure hose, and the high-speed water jet generated penetrates the cement sheath and rocks of oil and gas reservoirs.

[0027] The realization of new metals using hydrojet to directly penetrate the cement sheath and reservoir rock of oil and gas reservoirs requires the following steps:

[0028] (1) Lowering the soluble...

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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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