Title:
ROTARY STEERING WELL-DRILLING TOOL BASED ON BIT PRESSURE STEERING TRANSMISSION STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2020/244665
Kind Code:
A1
Abstract:
Disclosed is a rotary steering well-drilling tool based on a bit pressure steering transmission structure, belonging to the technical field of well-drilling devices. The rotary steering drill tool comprises a bit pressure steering transmission structure (101), a torque transmission shaft (102) and a rotary steering mechanism. The bit pressure steering transmission structure (101) is a cambered surface contact structure or a ball joint structure and is used for bearing bit pressure. The torque transmission shaft (102) comprises a universal shaft or a flexible shaft and is used for transmitting torque. During the rotary steering well-drilling process, an upper drill tool transmits bit pressure to the rotary steering mechanism through the bit pressure steering transmission structure (101) and further transmits the bit pressure to a drill bit (140); and the upper drilling tool transmits torque to the rotary steering mechanism through the torque transmission shaft (102) and further transmits the torque to the drill bit. Without affecting the normal rotary steering function, the rotary steering well-drilling tool based on a bit pressure steering transmission structure achieves separation of bit pressure transmission from torque transmission, so that the rotary steering drill tool can be united with a down-hole motor to implement rotary steering compound well-drilling.
Inventors:
XU ZICHEN (CN)
WAN XIAOYUE (CN)
WAN XIAOYUE (CN)
Application Number:
PCT/CN2020/094952
Publication Date:
December 10, 2020
Filing Date:
June 08, 2020
Export Citation:
Assignee:
WAN XIAOYUE (CN)
International Classes:
E21B7/06; E21B17/10
Domestic Patent References:
| WO2017087490A1 | 2017-05-26 |
Foreign References:
| CN107060643A | 2017-08-18 | |||
| CN108005579A | 2018-05-08 | |||
| CN109025820A | 2018-12-18 | |||
| CN208396654U | 2019-01-18 | |||
| CN1299915A | 2001-06-20 | |||
| US20140345944A1 | 2014-11-27 |
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
Download PDF:
Previous Patent: SOUND PICKUP, STRING INSTRUMENT AND SOUND PICKUP CONTROL METHOD
Next Patent: AUDIO PROCESSING METHOD, APPARATUS AND SYSTEM
Next Patent: AUDIO PROCESSING METHOD, APPARATUS AND SYSTEM