TWO-STAGE SEALING TYPE METAL DISSOLVABLE BRIDGE PLUG

WIPO Patent Application WO/2024/040786

A1

A two-stage sealing type metal dissolvable bridge plug, comprising a mandrel (2) and a cone (12) which are sleeved inside and outside. An outer surface of the cone (12) comprises an upper conical surface section (1201) and a lower conical surface section (1202) which are arranged vertically; an upper locking block group ring (6) and an upper metal sealing ring (9) which are arranged vertically being sleeved on the upper conical surface section (1201); a lower metal sealing ring (15) and an anchor block group ring (13) which are arranged vertically being sleeved on the lower conical surface section (1202); a lower end of the mandrel (2) being connected to a release joint (14); and the anchor block group ring (13) and the release joint (14) being connected vertically. The two-stage sealing type metal dissolvable bridge plug uses a dissolvable metal sealing ring, which is suitable for working conditions such as high temperature, high pressure, and high mineralization, achieving rapid dissolution of the bridge plug, having few residues, ensuring rapid production of unconventional oil and gas wells, shortening a construction cycle, and reducing economic costs.

ZHANG GUOTIAN (CN)
ZHANG YONG (CN)
CHEN XINGSHEN (CN)
WANG FANGMING (CN)
WANG XINGYAN (CN)
CHEN XIAOJUN (CN)
LI XINGJIE (CN)

PCT/CN2022/136060

February 29, 2024

December 02, 2022

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CHINA NAT PETROLEUM CORP (CN)
CNPC ENG TECH RES & DEV CO LTD (CN)
BEIJING PETROLEUM MACHINERY CO (CN)

E21B33/134; E21B33/128; E21B33/129

CN112523721A	2021-03-19
CN203097816U	2013-07-31
CN112727398A	2021-04-30
CN109973045A	2019-07-05
CN110792408A	2020-02-14
US20170342798A1	2017-11-30

BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)

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