High pressure water jet-flow deep penetrating perforating and its auxiliary crushing method and apparatus

A technology of high-pressure water jet and perforation hole, which is applied in the direction of production fluid, earthwork drilling, wellbore/well parts, etc., which can solve the problems of small hole diameter and shallow perforation depth, and achieve simplified fracturing process and casing strength. Little damage and decontamination effect

Inactive Publication Date: 2007-07-18
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a high-pressure water jet deep penetration perforation and auxiliary fracturing method and its device to solve the problem of shallow perforation depth and perforation diameter in oilfield shaped projectile perforation and hydraulic sandblasting perforation. The high-pressure water jet deep penetration perforation and auxiliary fracturing method and its devic

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  • High pressure water jet-flow deep penetrating perforating and its auxiliary crushing method and apparatus
  • High pressure water jet-flow deep penetrating perforating and its auxiliary crushing method and apparatus

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Embodiment Construction

[0036] The specific implementation of the present invention will now be described in detail with reference to the accompanying drawings. It is believed that the characteristics, technical effects and technical problems to be solved of the present invention will be more accurately and comprehensively understood through the following description.

[0037] Please refer to FIG. 1 first, which is a flow chart of the high-pressure water jet deep penetration perforation and auxiliary fracturing method of the present invention. The high-pressure water jet deep penetration perforation and auxiliary fracturing method of the present invention comprises the following steps:

[0038] 1. It is sent from the wellhead to the downhole device. The device has an outer casing and a punch that can be controlled by an uplock. The punch is equipped with a spray hose with a nozzle on the top;

[0039] 2. Connect the control rod and the sucker rod;

[0040] 3. Pressurize the water through the oil pipe;...

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Abstract

The present invention is high pressure water jet perforating and auxiliary pressure fracturing method and apparatus. The apparatus includes a sheath, a releasing adaptor in the upper end of the sheath, a guiding pipe plug in the lower end, a piston inside the sheath, a wedge connected to the lower end of the piston, a ram head connected to the wedge, a jetting hose with nozzle in the top and connected to a core tube, a control rod connected to the hose and the sucker rod, an upper lock to limit the piston and a lower lock to limit the core tube. Compared with available technology, the present invention has the advantages of further greater treating depth, long and large perforation, increased drainage area and capacity, no contamination to perforation, simplified perforating and pressure fracturing process and saving in oil producing cost.

Description

technical field [0001] The invention relates to an oil exploitation method and its equipment, in particular to a high-pressure water jet deep-penetration perforation and auxiliary fracturing method and device for opening up oil flow channels. Background technique [0002] Opening up oil flow channels is an important process in oil extraction. In the existing technology, opening up the oil flow channel includes using shaped projectile perforation to open the oil flow channel. The main perforation methods have not changed fundamentally for more than half a century. In terms of perforation technology, perforation safety automatic control system, horizontal well perforation technology, super positive pressure perforation technology, cable conveying belt pressure perforation technology, cable perforation staged ignition perforation technology, pipe transmission multi-layer perforation staged detonation technology, azimuth perforation technology, etc., to improve perforation effe...

Claims

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Application Information

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IPC IPC(8): E21B43/117E21B43/26
Inventor 李根生沈忠厚黄中伟牛继磊
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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