Title:
LARGE-DIAMETER COMBINATION IMPACTOR AND DOWN-THE-HOLE DRILLING RIG
Document Type and Number:
WIPO Patent Application WO/2022/105343
Kind Code:
A1
Abstract:
Provided are a large-diameter combination impactor and a down-the-hole drilling rig comprising same; the impactor comprises a base (8), a first joint (1) connected to a drill pipe, a first fixing plate (2) arranged sleeved on said first joint, a first cylinder (3) removably connected to said first fixing plate, a second cylinder (4) connected to said first cylinder, the second cylinder being provided with a second fixing plate (5), and a reinforcement assembly (6) connected to the first fixing plate and the second fixing plate, respectively; said reinforcement assembly is connected to the first joint, the second cylinder is provided with at least two impact units (7), the base is provided with a fixing plate assembly (12) between the base and the second fixing plate, and the impact units pass through the fixing plate assembly. The large-diameter combination impactor and down-the-hole drilling rig have an increased overall axial length, and during the process of drilling holes in loose rock layers, have a high verticality of hole formation.
Inventors:
YANG RIPING (CN)
ZHU ZIJIA (CN)
YANG XIANGLONG (CN)
ZHU ZIJIA (CN)
YANG XIANGLONG (CN)
Application Number:
PCT/CN2021/114871
Publication Date:
May 27, 2022
Filing Date:
August 27, 2021
Export Citation:
Assignee:
CHANGSHA HEIJINGANG IND CO LTD (CN)
International Classes:
E21B4/14
Foreign References:
| CN112282637A | 2021-01-29 | |||
| CN213683944U | 2021-07-13 | |||
| CN213478207U | 2021-06-18 | |||
| CN213478206U | 2021-06-18 | |||
| CN213928226U | 2021-08-10 | |||
| CN111119726A | 2020-05-08 | |||
| CN106223840A | 2016-12-14 | |||
| KR960008593Y1 | 1996-10-04 | |||
| CN105003199A | 2015-10-28 | |||
| JP2003314182A | 2003-11-06 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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