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Casing drilling system and casing drilling method

A casing drilling and casing technology, applied in the field of casing drilling system and casing drilling, can solve the surrounding soil pollution and other problems, and achieve the effect of avoiding pollution of the surrounding environment

Pending Publication Date: 2018-02-09
成都康叶环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a casing drilling system to solve the problem that the existing drilling technology is prone to pollute the surrounding soil due to drilling fluid and oil leakage during the drilling process

Method used

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  • Casing drilling system and casing drilling method
  • Casing drilling system and casing drilling method

Examples

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Embodiment

[0039] figure 1 It is a structural schematic diagram of the casing drilling system 100 in the embodiment of the present invention. See figure 1 , The casing drilling system 100 of the embodiment of the present invention includes a screw drilling tool 10, the lower end of the screw drilling tool 10 is connected with a drill bit 30 for drilling and a reamer 40 for reaming to form an internal drive system for driving downhole. A casing 20 is provided at intervals outside the screw drilling tool 10, and the screw drilling tool 10 is isolated from the well wall of the environment. A channel T1 is formed at intervals between the casing 20 and the screw drilling tool 10 . The inner flow channel T2 for supplying drilling fluid inside the screw drilling tool 10 communicates with the channel T1 at the lower end to form a fluid circulation T0. The casing 20 is driven to rotate by the external drive system, and the rotation of the casing 20 can change the resistance of the lower casing...

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Abstract

The invention relates to the field of drilling equipment, and provides a casing drilling system and a casing drilling method. The purpose is to solve the problem that according to an existing drillingtechnology, pollution to surrounding soil caused by drilling fluid, oil leakage and the like is likely to occur in the drilling process. The casing drilling system comprises a positive displacement motor drill, and the lower end of the positive displacement motor drill is connected with a drill head used for drilling a hole and a hole opener used for expanding the hole. A casing pipe sleeves thepositive displacement motor drill at an interval, and the positive displacement motor drill is isolated from an environment borehole wall. A channel is formed by the spacing between the casing pipe and the positive displacement motor drill. The lower end of an internal runner, used for supplying the drilling fluid, in the positive displacement motor drill is communicated with the lower end of thechannel to form a fluid cycle. The casing drilling system and the casing drilling method have the advantages that drilling is efficient, and pollution to the surrounding environment can be avoided.

Description

technical field [0001] The invention relates to the field of drilling equipment, in particular to a casing drilling system and a casing drilling method. Background technique [0002] The existing drilling technology is prone to pollute the surrounding soil due to drilling fluid and oil leakage during the drilling process. Contents of the invention [0003] The present invention aims to provide a casing drilling system to solve the problem that the existing drilling technology is prone to pollute the surrounding soil due to drilling fluid and oil leakage during the drilling process. [0004] Another object of the present invention is to provide a casing drilling method based on the above casing drilling system. [0005] Embodiments of the present invention are achieved like this: [0006] An embodiment of the present invention provides a casing drilling system, which includes a screw drilling tool, the lower end of which is connected to a drill bit for drilling and a ream...

Claims

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Application Information

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IPC IPC(8): E21B7/20E21B7/28E21B21/00
CPCE21B7/20E21B7/28E21B21/00
Inventor 叶小民孙瑜孙月明李斌蒋宇鸿王永友干建华陈华兵刘勇袁浩李蓝鹏谢佳辰王皓吴芸婷叶长文
Owner 成都康叶环保科技有限公司
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