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Drilling method for coiled tubing high-voltage electrical pulse/mechanical composite rock breaking

A high-voltage electric pulse and composite rock-breaking technology, which is applied to drilling equipment and methods, drilling equipment, directional drilling, etc., to achieve the effects of improving drilling efficiency, good technology inheritance, and ensuring wellbore quality

Active Publication Date: 2019-04-05
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only drill vertical wells, so it is somewhat limited

Method used

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  • Drilling method for coiled tubing high-voltage electrical pulse/mechanical composite rock breaking
  • Drilling method for coiled tubing high-voltage electrical pulse/mechanical composite rock breaking
  • Drilling method for coiled tubing high-voltage electrical pulse/mechanical composite rock breaking

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can also be implemented in other ways than those described here. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0024] The coiled tubing high-voltage electric pulse-mechanical composite rock-breaking drilling method of some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0025] A kind of coiled tube high-voltage electric pulse-mechanical composite rock-breaking drilling method provided by the present invention, such as figure 1 with figure 2 shown, wher...

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Abstract

The invention relates to a drilling method for cabled coiled tubing high-voltage electrical pulse / mechanical composite rock breaking. A system for the drilling method includes a ground surface and control apparatus, a coiled tubing drum, a deionizing pump and its slurry purifying system, a cable, a hydraulic line, a coiled tubing injection head, a derrick, a cabled coiled tubing, a power amplification and electrical pulse generator, a coiled tubing connector, an underground power drill and electrode bit and the like. The traditional coiled tubing drilling method and the high-voltage electricalpulse drilling rock-breaking method (including electrical pulse rock breaking and hydroelectric rock breaking) are combined herein; the drilling method is suitable for both straight wells and oriented wells (including horizontal wells); a high-voltage electrical pulse generator is arranged in a lower drill combination, so that energy conversion efficiency is improved. The drilling method also hasthe advantages that, for instance, cable lowering is convenient, rock breaking efficiency is high, well wall quality is good, and deep well drilling cost is low.

Description

technical field [0001] The invention relates to a high-efficiency rock-breaking drilling method used in the oil and gas drilling and development process, in particular to a high-voltage electric pulse-mechanical composite rock-breaking drilling method with cable coiled tubing. Background technique [0002] The field of exploration and development of oil and natural gas continues to expand, and the research on efficient rock-breaking drilling technology is imperative. When drilling deep and ultra-deep wells with high temperature and high pressure, traditional mechanical rotary drilling has disadvantages such as low drilling efficiency, difficult construction, and high drilling costs. It needs to rely on new rock breaking technology. [0003] At present, the cutting-edge drilling and rock breaking methods mainly include: water jet rock breaking, particle jet rock breaking, laser drilling rock breaking, ultrasonic and thermal rock breaking, etc. Particle flow rock breaking has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B10/00E21B7/04
CPCE21B7/00E21B7/04E21B10/00
Inventor 祝效华罗云旭
Owner SOUTHWEST PETROLEUM UNIV
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