Title:
ROTARY DRILLING RIG
Document Type and Number:
WIPO Patent Application WO/2022/268041
Kind Code:
A1
Abstract:
Disclosed is a rotary drilling rig, comprising a cathead (11) and a mast (12), wherein the cathead (11) is connected to the upper end of the mast (12), and the cathead (11) can rotate on the mast (12) to adjust the position thereof, thereby solving the problem of the rotary drilling rig being overheight during transportation.
Inventors:
YANG LONGJUN (CN)
LI WEIFU (CN)
ZHANG FANGHONG (CN)
ZHAO JIAN (CN)
CHEN LONG (CN)
LI WEIFU (CN)
ZHANG FANGHONG (CN)
ZHAO JIAN (CN)
CHEN LONG (CN)
Application Number:
PCT/CN2022/099985
Publication Date:
December 29, 2022
Filing Date:
June 20, 2022
Export Citation:
Assignee:
SHANGHAI ZOOMLION PILING MACHINERY CO LTD (CN)
ZOOMLION HEAVY INDUSTRY SCIENCE AND TECH CO LTD (CN)
ZOOMLION HEAVY INDUSTRY SCIENCE AND TECH CO LTD (CN)
International Classes:
E21B7/02
Foreign References:
| CN113236122A | 2021-08-10 | |||
| CN102661127A | 2012-09-12 | |||
| CN203742441U | 2014-07-30 | |||
| US20180128056A1 | 2018-05-10 | |||
| US20170247902A1 | 2017-08-31 |
Attorney, Agent or Firm:
PSHIP FIRM, LLC (CN)
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