Drilling device and method for efficient rock breaking by using liquid nitrogen jet flow

A liquid nitrogen and rock-breaking technology, which is applied in the direction of drilling with liquid/gas jets, can solve the problems of low drilling speed and liquid nitrogen, and achieve the effects of high drilling efficiency, favorable promotion and use, and simple structure

Inactive Publication Date: 2017-02-08
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to provide a drilling device and method that uses liquid nitrogen jets to efficiently ...

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  • Drilling device and method for efficient rock breaking by using liquid nitrogen jet flow
  • Drilling device and method for efficient rock breaking by using liquid nitrogen jet flow
  • Drilling device and method for efficient rock breaking by using liquid nitrogen jet flow

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[0026] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific implementation examples described here are only used to explain the present invention, and are not intended to limit the present invention.

[0027] The application principle of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, the drilling system using liquid nitrogen jets to efficiently break rocks provided by the embodiment of the present invention is provided with a coiled tubing 2, a liquid nitrogen injection pipeline 3, an annular casing 6, a liquid nitrogen compressor 7, and a liquid nitrogen pump set 8 . Coiled tubing operation vehicle 9. Drilling device; the coiled tubing 2 is set inside the annular casing 6; the liquid nitrogen injection ...

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Abstract

The invention discloses a drilling device and method for efficient rock breaking by using liquid nitrogen jet flow. The method comprises the following steps that liquid nitrogen is used as a jet flow medium and is sprayed out from a high-pressure jet flow spray nozzle in a pulse form; pulse waves further press a disc spring arranged in an opening position of the high-pressure jet flow spray nozzle, so that the disc spring generates vibration to drive the whole spray nozzle to vibrate; the generation of ice bags is avoided. The system is provided with a continuous oil pipe, a liquid nitrogen injection pipeline, an annular sleeve pipe, a liquid nitrogen compressor, a liquid nitrogen pump group, a continuous oil pipe operation car and a drilling device. The drilling device and the drilling method have the advantages that the acting principle of the liquid nitrogen at the stratum is utilized; a jet flow technology using the liquid nitrogen as the jet flow medium is combined with a continuous pipe technology; the stratum efficient rock breaking can be realized; the rock can be broken effectively, so that the drilling efficiency is higher; the cost is lower.

Description

technical field [0001] The invention belongs to the field of oil and gas exploitation, and in particular relates to a drilling device and method for efficiently breaking rocks by liquid nitrogen jets. Background technique [0002] As most of my country's oil fields have entered the middle and late stages of development, my country's oil and gas exploration and development have shifted from the previous good exploration and development conditions such as large integrated oil and gas fields and medium-high permeability homogeneous sandstone to complex small and medium oil and gas fields, fault-block oil and gas fields, low pressure and low Due to harsh exploration and development conditions such as low seepage productivity, reconstruction of old oilfields, complex reservoir conditions, hard-to-produce reserves, and unconventional oil and gas, more complex situations are encountered during drilling, and the rate of decline in drilling speed increases significantly with the increa...

Claims

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Application Information

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IPC IPC(8): E21B7/18
CPCE21B7/18
Inventor 王国华黄燊熊继有秦大伟谭军邓丽
Owner SOUTHWEST PETROLEUM UNIV
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