Title:
MULTI-CYCLE FLOW CHANNEL DRILLING SYSTEM AND DRILLING PROCESS FOR USE IN LARGE-SCALE BOREHOLE HARD ROCK DRILLING
Document Type and Number:
WIPO Patent Application WO/2019/184073
Kind Code:
A1
Abstract:
Disclosed are a multi-cycle flow channel drilling system and drilling process for use in large-scale borehole hard rock drilling. The drilling system comprises a downhole air hammer ground manifold and device, a gas lift manifold and device, a drilling drive apparatus, a multi-cycle flow channel drilling tool and a mud circulating device (6), wherein the downhole air hammer ground manifold and device and the gas lift manifold and device each correspondingly communicate with the multi-cycle flow channel drilling tool by means of the drilling drive apparatus, and the mud circulating device (6) is connected to the drilling drive apparatus by means of an erosion resistant gooseneck (15) and a sand discharging pipeline (14). The present system combines the advantages of both gas lifting reverse circulation sand discharge and a closed reverse circulation air hammer; while ensuring drilling efficiency, the gas injection volume may also be greatly reduced, which is beneficial in reducing device investment, reducing the occupation area of a site, reducing the demand for power and drilling fluid, and saving on fuel consumption.
Inventors:
GONG ZHIYONG (CN)
Application Number:
PCT/CN2018/088048
Publication Date:
October 03, 2019
Filing Date:
May 23, 2018
Export Citation:
Assignee:
BEIJING CAPITAL HEAT CO LTD (CN)
International Classes:
E21B1/24
Domestic Patent References:
| WO2012116155A1 | 2012-08-30 |
Foreign References:
| CN102966304A | 2013-03-13 | |||
| CN106812462A | 2017-06-09 | |||
| AU2005267303A1 | 2006-02-02 | |||
| CN205743802U | 2016-11-30 | |||
| CN2763452Y | 2006-03-08 | |||
| CN105113978A | 2015-12-02 | |||
| CN105178859A | 2015-12-23 | |||
| CN201410747538A | 2014-12-08 | |||
| CN204326956U | 2015-05-13 | |||
| CN102966304A | 2013-03-13 |
Other References:
See also references of EP 3770374A4
Attorney, Agent or Firm:
BEIJING EASTKING PATENT AGENT FIRM (CN)
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