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A kind of double-wall drill pipe drilling system and drilling method

A double-wall drill pipe and drilling technology, which is applied to drill pipes, drilling equipment, wellbore/well components, etc., can solve the problems of reduced signal reliability and reduced signal-to-noise ratio, and achieve the effect of broad market application prospects.

Active Publication Date: 2018-01-26
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the drilling depth increases, the downhole uploaded signal will attenuate accordingly, resulting in a decrease in the signal-to-noise ratio and a decrease in the reliability of signal reception. When the ground reaches a certain depth, the ground will not be able to receive the downhole uploaded signal, which is an insurmountable measurement-while-drilling problem.

Method used

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  • A kind of double-wall drill pipe drilling system and drilling method
  • A kind of double-wall drill pipe drilling system and drilling method
  • A kind of double-wall drill pipe drilling system and drilling method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Refer to attached figure 1 , a double-wall drill pipe drilling system, including gas phase injection device 1 (such as air compressor SULLAIR1150XH / Kade 1500-400HT, supercharger E3430 / 243, etc.), liquid phase injection device 2 (such as Baoji Petroleum Machinery for conventional drilling Co., Ltd. produced F-1600 mud pump, etc.), gas phase injection pipeline 3 (such as 3″ hard pipe, 3″ gas injection riser manifold, 6MPa shock-resistant pressure gauge, matching 3″ stop valve, etc.), liquid phase injection pipeline 4 ( Such as conventional drilling with 4″ surface high-pressure hard pipe and manifold group, etc.), rotary fluid injection device 5 (also known as top injection joint / top drive adapter, such as figure 2 ), rotary control head 6 (such as rotary blowout preventer / rotary diversion system), double-walled drill pipe 8, double-walled drill collar 11, measurement-while-drilling device 13 and gas-liquid confluence nipple 14 (such as image 3 )composition.

[0022] ...

Embodiment 2

[0028] Embodiment 2: The usage method of the double-wall drill pipe drilling system is as follows:

[0029] The drill string combination in this embodiment is: rotary fluid injection device 5 + double-walled drill pipe 8 + double-walled drill collar 11 + measurement-while-drilling device 13 + gas-liquid confluence nipple 14 + power drilling tool 15 + drilling tool check valve 16+ drill bits 17.

[0030] The gas phase injection device 1 generates gas and injects the gas into the drilling tool, passing through the casing bypass port of the rotary fluid injection device 5, the annular gap between the inner tube of the central tube and the outer tube of the central tube of the rotary fluid injection device 5, and the double-walled drill pipe 8 The annulus between the inner drill pipe 10 and the outer drill pipe 9, the gas-phase flow channel of the double-walled drill collar 11, the gas-phase fluid outer tube of the measurement-while-drilling device 13 and the annular gap of the me...

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Abstract

The invention discloses a double-wall drill pipe drilling system and a drilling method. The system is mainly composed of gas phase injection device, liquid phase injection device, rotary control head, blowout preventer group, rotary fluid injection device, double-walled drill pipe, double-walled drill collar, measurement while drilling device, gas-liquid confluence sub-joint, power drilling tool , Drilling tool check valve drill bit; gas phase and liquid phase flow through their respective channels before the measurement while drilling device, and pass through the measurement while drilling device respectively; after flowing through the measurement while drilling device, they are mixed at the gas-liquid confluence short junction , and finally enter the drilling annulus from the drill bit. The liquid phase passes through the measurement inner tube of the measurement-while-drilling device, and the pulse generated by the measurement device is transmitted to the wellhead for detection. The method can solve the difficult problem of gas drilling measurement while drilling or well logging in deep wells and horizontal wells, and has broad market application prospects.

Description

technical field [0001] The invention relates to a double-wall drill pipe drilling system and a drilling method, belonging to the technical field of petroleum drilling equipment and technology. Background technique [0002] my country has a large area of ​​low-porosity, low-permeability, low-pressure, and low-abundance oil and gas reservoirs. At the same time, with the continuous deepening of oil and gas exploration and development, more and more formations that are prone to leakage, highly abrasive, and extremely hard are drilled. Gas drilling technology is an effective technical means to solve the above drilling problems, improve drilling speed, and protect oil and gas layers. Gas drilling technology includes air drilling, atomization drilling, foam drilling and air-filled drilling. It is a method to protect oil and gas layers and shorten the well construction period. It has great advantages that cannot be compared with other drilling technologies. At present, the measureme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00E21B17/16E21B47/00E21B47/12
Inventor 李宗清王树江朱焕刚于海叶韩玉华苗智瑜赵义李建新段光辉宋中文赵绪龙赵亚坤邓霖
Owner CHINA PETROCHEMICAL CORP