Drilling system with multiple circular flow channels for large-scale borehole hard rock drilling and drilling process

A multi-circulation, large-scale technology, applied in wellbore drilling drives, wellbore/well components, drilling equipment, etc., to achieve the effect of reducing demand, reducing gas injection, and reducing equipment investment

Pending Publication Date: 2018-08-17
BEIJING CAPITAL HEAT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Jilin University combined the advantages of high-efficiency hard rock drilling with air hammer and the advantages of mud positive circulation drilling to protect the well wall, and invented the closed circulation three-channel reverse circulation air hammer drilling technology (the announcement number is CN102966304B, and the patent name is "Mud However, this invention still uses the sand-carrying process of positive mud circulation, so this method is only suitable for hard rock drilling of small-sized wells

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  • Drilling system with multiple circular flow channels for large-scale borehole hard rock drilling and drilling process
  • Drilling system with multiple circular flow channels for large-scale borehole hard rock drilling and drilling process
  • Drilling system with multiple circular flow channels for large-scale borehole hard rock drilling and drilling process

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Embodiment Construction

[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0057] Such as figure 1 As shown, the present invention is a multi-circulation channel drilling system for large-scale hard rock drilling, including downhole air hammer surface manifold and equipment, gas lift manifold and equipment, drilling drive device, multi-circulation channel drill tools and mud circulation equipment 6, the ground manifold and equipment of the downhole air hammer and the gas lift manifold and equipment are connected to the multi-circulation channel drilling tool through the drilling drive device, and the mud circulation equipment 6 passes through the erosion-resistant gooseneck 15 and the drain The sand pipeline 14 is connected to the drilling drive.

[0058] Such as Figure 2 to Figure 8 As shown, among them, the multi-circulation channel drilling tool includes the coaxial four-channel drill pipe 22, the coaxial three...

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Abstract

The invention discloses a drilling system with multiple circular flow channels for large-scale borehole hard rock drilling and a drilling process. The drilling system includes underground air hammer ground manifold equipment, gas lift manifold equipment, a drilling drive device, drilling tools for the circular flow channels and slurry circulating equipment; the underground air hammer ground manifold equipment and the gas lift manifold equipment are both correspondingly communicated with the drilling tools for the circular flow channels through the drilling drive device, and the slurry circulating equipment is connected with the drilling drive device through anti-erosion goosenecks and a sand discharging pipeline. The system integrates the advantages of reversely circular sand discharging through gas lift and closed-type reversely-circular air hammers, ensures the drilling efficiency and significantly decreases the gas feeding amount at the same time; decrease of investment on equipmentis facilitated, the occupied area of space is reduced, the demands for power and drilling fluids are decreased, and the fuel consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of drilling engineering, in particular to a multi-circulation channel drilling system and a drilling process for large-scale hard rock drilling. Background technique [0002] At present, there are many kinds of drilling methods for large-size wellbore at home and abroad, mainly divided into rotary drilling, rotary drilling rig drilling, drilling and blasting method sinking (mine construction), shaft boring machine drilling (mine construction), percussion rotary (or punching rotary drilling) ) drilling, etc. [0003] (1) Rotary Drilling [0004] Rotary drilling uses rock-breaking tools such as roller cone bits, hob bits, scraper bits and other rock-breaking tools to perform drilling. Two drilling processes, mud positive circulation and gas lift reverse circulation, can be used. If the drilling capacity (torque) is insufficient and it is difficult to realize the ability to drill a well, usually the multi-sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/18E21B21/16E21B4/14
CPCE21B4/14E21B17/18E21B21/16E21B21/12E21B21/14
Inventor 龚智勇
Owner BEIJING CAPITAL HEAT CO LTD
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