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Downhole drilling device

A drilling device and threaded hole technology, which is applied in the drilling drive device, earthwork drilling, drilling equipment and other directions in the wellbore, can solve the problems of limited rock breaking effect by jet, complicated operation and reduced applicability, etc.

Active Publication Date: 2019-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rock-breaking effect of jetting is limited. In addition, the small holes of the main pipe need to be perforated in advance, and the process is cumbersome, and only one hole can be drilled in the rock formation for each operation. If multiple holes are drilled, the pipe string needs to be tripped multiple times. Carry out the corresponding construction, the operation is cumbersome, and the time is too long, which reduces the applicability of the method

Method used

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] figure 1 A downhole drilling apparatus 10 is shown in this embodiment. The downhole drilling device 10 includes a casing 1 , an impeller 4 , an extension pipe 3 and a bracket 2 all arranged in the casing 1 . In this embodiment, the casing 1 is configured in a cylindrical shape. The impeller 4 and the bracket 2 are respectively arranged at two ends of the casing 1 . The extension tube 3 passes through the bracket 2 and the impeller 4 in turn. The bracket 2 is connected with the extension tube 3, and the bracket 2 is used to prevent the extension tube 3 from rotating around its axis. The extension pipe 3 and the impeller 4 are screwed together. The fluid passes through the annular space between the extension tube 3 and the casing 1 to drive the impeller 4 to rotate, and the impeller 4 pulls the extension tube 3 so that the front end of the extension tube 3 protrud...

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Abstract

The invention provides an underground drilling device. The underground drilling device comprises an outer casing, an impeller, an extension pipe and a support, wherein the middle of the impeller is provided with a threaded hole extending in the axial direction, the impeller is arranged in the outer casing, the extension pipe is provided with an external thread matched with the threaded hole and penetrates through the impeller from the threaded hole, and the support is used for preventing the extension pipe from conducting rotation relative to the outer casing. When passing the outer casing, fluid can drive the impeller to rotate to enable the impeller to draw the extension pipe to extend out of the outer casing. According to the underground drilling device, the structure is simple, and operation is convenient.

Description

technical field [0001] The invention relates to an oil downhole tool, in particular to a downhole drilling device. Background technique [0002] Opening up oil flow channels is an important process in oil extraction. In the prior art, opening the oil flow channel includes using shaped projectile perforation to open the oil flow channel, and the main perforation method has not changed fundamentally for more than half a century. Although perforation technology, tools and methods have made great progress, the problem of compaction zone pollution caused by perforation to the reservoir cannot be overcome, and the effective permeability of the reservoir is greatly reduced, which is extremely unfavorable to crude oil production. For this reason, people began to adopt the technology of hydraulic sandblasting and perforation, but due to the limitations of nozzle materials and high-pressure pumps, this method has not been applied on a large scale. [0003] A punching device is propo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/18E21B4/02
CPCE21B4/02E21B7/18
Inventor 马兰荣朱玉杰程光明戴文潮尹慧博
Owner CHINA PETROLEUM & CHEM CORP