Title:
DOWNHOLE BLOWOUT PREVENTER AND BLOWOUT PREVENTION OPERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/127155
Kind Code:
A1
Abstract:
A downhole blowout preventer and a blowout prevention operation method using same. The downhole blowout preventer (100) comprises a blowout preventer string (110) comprising a circulation unit (1), a packer unit (2), and a pressure unit (5) connected in sequence from top to bottom, wherein the pressure unit is configured to be started in response to an instruction, so that the space inside the blowout preventer string is pressed; the packer unit is configured to be started when the pressure within the space reaches a first predetermined value, thereby sealing an annulus between the blowout preventer string and an outer sleeve or wellbore; the circulation unit is configured to be started when the pressure within the space reaches a second predetermined value, thereby establishing a circulation channel between the interior and the exterior of the blowout preventer string, wherein the first predetermined value is less than the second predetermined value.
Inventors:
MA LANRONG (CN)
GU LEI (CN)
YIN HUIBO (CN)
ZHENG XIAOZHI (CN)
CHENG GUANGMING (CN)
HOU YUEQUAN (CN)
GU LEI (CN)
YIN HUIBO (CN)
ZHENG XIAOZHI (CN)
CHENG GUANGMING (CN)
HOU YUEQUAN (CN)
Application Number:
PCT/CN2021/112796
Publication Date:
June 23, 2022
Filing Date:
August 16, 2021
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC RES INST PETROLEUM ENG (CN)
SINOPEC RES INST PETROLEUM ENG (CN)
International Classes:
E21B33/122
Foreign References:
| US3853177A | 1974-12-10 | |||
| CN111379536A | 2020-07-07 | |||
| CN203626793U | 2014-06-04 | |||
| CN201599007U | 2010-10-06 | |||
| CN202645490U | 2013-01-02 | |||
| US3746097A | 1973-07-17 |
Attorney, Agent or Firm:
YUHUA UNITED INTELLECTUAL PROPERTY LAW FIRM (CN)
Download PDF: