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A horizontal well coiled tubing drill string

A technology for horizontal wells and tubing, applied in the field of unconventional oil and gas exploration and development, can solve problems such as long drilling and removal time of horizontal bridge plugs and insufficient drilling pressure, and achieve the effects of stable drilling process, improved efficiency and extended service life.

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

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortage of drilling pressure on the drilling tool of the drilling plug string in the prior art which leads to too long drilling time of the bridge plug in the horizontal section

Method used

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  • A horizontal well coiled tubing drill string
  • A horizontal well coiled tubing drill string
  • A horizontal well coiled tubing drill string

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Experimental program
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Effect test

Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing.

[0029] Such as figure 1 As shown, the coiled tubing drill string 10 of the embodiment of the present invention includes a grinding shoe 11 for drilling bridge plugs, a motor 12 drivingly connected to the grinding shoe 11, and a motor head 13 fixedly connected to the motor 12 , the anchor press device 14 fixedly connected with the motor head 13, the oscillator 15 fixedly connected with the anchor press device 14, the jar 16 fixedly connected with the oscillator 15 and the continuous Oil pipe joint 17. After the coiled tubing plug string 10 of the horizontal well is lowered to a predetermined position in the casing of the horizontal well, liquid under pressure is input into the plug string 10 . The anchoring and pressurizing device 14 is in the working state and the drill plug string 10 is anchored, and the liquid can drive the motor 12 to rotate, and then the motor 12 driv...

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Abstract

The invention provides a horizontal well coiled tube drilling plug tubular column which comprises a milling shoe, a motor, a motor head, an anchoring and pressurizing device and a jar knocker, wherein the milling shoe, the motor, the motor head, the anchoring and pressurizing device and the jar knocker are sequentially connected. The horizontal well coiled tube drilling plug tubular column comprises the anchoring and pressurizing device which can anchor a drilling plug tubular column body into a horizontal well casing tube. After the drilling plug tubular column body is anchored into the horizontal well casing tube through the anchoring and pressurizing device, the milling shoe is pressurized to guarantee the drilling pressure of the milling shoe. The anchored drilling plug tubular column can balance the axial force generated when the milling shoe drills and removes a bridge plug, and the drilling process of the milling shoe is stable. Accordingly, the efficiency of the drilling and removing of the bridge plug is improved, and the time for drilling and removing the bridge plug is shortened.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas exploration and development, in particular to a horizontal well coiled tubing drilling plug string. Background technique [0002] The development of unconventional oil and gas mainly depends on the staged fracturing technology of horizontal wells to increase the production of a single well. Among them, the integrated staged fracturing technology of hydraulic pumping, bridge plug, perforation and fracturing has become a popular technology for unconventional oil and gas reservoirs, especially in shale. An important means of oil and gas reservoir development. After the staged fracturing of this process is completed, a bridge plug is left in the wellbore. In order to restore the wellbore to ensure smooth oil and gas production, it is necessary to drill, mill and mill out the bridge plug. The existing drilling, milling and milling bridge plug string The structure includes two operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/00E21B31/107E21B23/01
Inventor 李洪春贾长贵曾义金连经社李奎为滕春鸣魏娟明
Owner CHINA PETROLEUM & CHEM CORP
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