Title:
CONCENTRIC INJECTION-PRODUCTION PIPE APPLIED TO FRACTURED OIL AND GAS WELL, CENTRAL STRING, AND WELL COMPLETION STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2023/077958
Kind Code:
A1
Abstract:
Disclosed is a concentric injection-production pipe applied to a fractured oil and gas well, the concentric injection-production pipe comprising a cylindrical channel pipe (51), wherein a water outlet (511) is formed in the channel pipe (51); the channel pipe (51) is internally provided with a support ring (52), the support ring (52) is generally in the form of a cylindrical structure, a plurality of support points (521) extending outwardly are provided on an outer wall of the support ring (52), and the plurality of support points (521) are attached to an inner wall of the channel pipe (51), so as to form an annular wall-sandwiched cavity (56) which is formed by the inner wall of the channel pipe (51) and the outer wall of the support ring (52) and has two ends in communication with each other; a water outlet channel (522) is further provided at a position on the support ring (52) that corresponds to the water outlet (511) of the channel pipe (51), and the water outlet channel (522) communicates the water outlet (511) with the interior of the support ring (52); and a retaining wall (523) is provided on the periphery of the water outlet channel (522), the retaining wall (523) is attached to the inner wall of the channel pipe (51), such that the water outlet channel (522) is isolated from the wall-sandwiched cavity (56). The concentric injection-production pipe has a water injection channel and a liquid production channel, such that the string can be easily operated in a well, a larger overflow surface is provided, and the working efficiency can thus be improved.
Inventors:
PEI BAILIN (CN)
WU JIANCHANG (CN)
SONG XIAOQIANG (CN)
WU JIANCHANG (CN)
SONG XIAOQIANG (CN)
Application Number:
PCT/CN2022/117974
Publication Date:
May 11, 2023
Filing Date:
September 09, 2022
Export Citation:
Assignee:
ANTON BAILIN PETROLEUM TECH BEIJING CO LTD (CN)
PEI BAILIN (CN)
WU JIANCHANG (CN)
SONG XIAOQIANG (CN)
PEI BAILIN (CN)
WU JIANCHANG (CN)
SONG XIAOQIANG (CN)
International Classes:
E21B43/20
Foreign References:
| CN216043664U | 2022-03-15 | |||
| CN113431529A | 2021-09-24 | |||
| CN210685949U | 2020-06-05 | |||
| US20020157837A1 | 2002-10-31 | |||
| US20020125007A1 | 2002-09-12 |
Attorney, Agent or Firm:
BEIJING YINGKE LAW FIRM (CN)
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