Title:
PACKER APPARATUS WHILE DRILLING AND REVERSE CIRCULATION DRILLING DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/067533
Kind Code:
A1
Abstract:
A packer apparatus while drilling and a reverse circulation drilling device. The packer apparatus (100) while drilling comprises: at least one rubber cylinder packer (1) which comprises a rubber cylinder (12), a framework (13) and two rubber cylinder seats (11); and an upper transmission structure (2) and a lower transmission structure (3) which can move relative to each other along the axial direction of a shaft (300). In a drilling state, the upper transmission structure (2) moves downwards relative to the lower transmission structure (3) along the axial direction of the shaft (300) and drives the upper rubber cylinder seat (11) to approach the lower tubber cylinder seat (11), and the framework (13) can expand from a first expansion form to a second expansion form and supports the rubber cylinder (12) to guide the rubber cylinder (12) to expand outwards and deform. In a trip out state, the upper transmission structure (2) moves upwards relative to the lower transmission structure (3) along the axial direction of the shaft (300), the upper rubber cylinder seat (11) moves away from the lower rubber cylinder seat (11), and the framework (13) can retract from the second expansion form to the first expansion form. The apparatus can avoid the problem that sealing cannot be achieved due to inward contraction or other uncontrollable deformation of a rubber cylinder, so that the risk of drill pipe sticking is not prone to occur, and the stability of a rubber cylinder packer is improved.
Inventors:
DENG HU (CN)
FAN LIMING (CN)
LI ZHILIN (CN)
ZHOU CHANGHONG (CN)
HAN XIONG (CN)
TANG GUI (CN)
ZHANG LIN (CN)
PANG DONGXIAO (CN)
JIANG JIE (CN)
LIAO BING (CN)
YANG CHAO (CN)
FAN LIMING (CN)
LI ZHILIN (CN)
ZHOU CHANGHONG (CN)
HAN XIONG (CN)
TANG GUI (CN)
ZHANG LIN (CN)
PANG DONGXIAO (CN)
JIANG JIE (CN)
LIAO BING (CN)
YANG CHAO (CN)
Application Number:
PCT/CN2023/121302
Publication Date:
April 04, 2024
Filing Date:
September 26, 2023
Export Citation:
Assignee:
CHINA NAT PETROLEUM CORP (CN)
CNPC CHUANQING DRILLING ENG CO (CN)
CNPC CHUANQING DRILLING ENG CO (CN)
International Classes:
E21B33/128; E21B33/127
Foreign References:
| CN114482910A | 2022-05-13 | |||
| CN115434657A | 2022-12-06 | |||
| CN212317924U | 2021-01-08 | |||
| CN212317928U | 2021-01-08 | |||
| CN114658386A | 2022-06-24 | |||
| CN207583344U | 2018-07-06 | |||
| CN113863879A | 2021-12-31 | |||
| US4403660A | 1983-09-13 |
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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