Title:
HYDRAULIC SYSTEM FOR DOWNHOLE SLIDING SLEEVE ZONE SELECTION AND OPENING DEGREE CONTROL AND METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/097928
Kind Code:
A1
Abstract:
A hydraulic system for downhole sliding sleeve zone selection and opening degree control, comprising: a zone selection nipple (4) comprising a group of hydraulic input ports, a group of hydraulic output ports, and a first group of hydraulic control valves connected therebetween, the opening and closing of the hydraulic output ports being controlled by means of the hydraulic control valves; a high and low pressure selection nipple (10) comprising a group of hydraulic connectors, a group of high and low pressure output ports and oil return ports, and a second group of hydraulic control valves connected therebetween, wherein the group of hydraulic connectors are connected to the group of hydraulic output ports in one-to-one correspondence, the opening and closing of the high and low pressure output ports and oil return ports being controlled by means of the second group of hydraulic control valves and the input mode and pressure adjustment of the zone selection nipple (4). The system enables downhole zone selection and opening degree control, and has the advantages of being a simple solution, easy opening degree control and the like. Also disclosed is a method for using the hydraulic system for downhole sliding sleeve zone selection and opening degree control.
Inventors:
LI ZHONG (CN)
XU LIANGBIN (CN)
FAN BAITAO (CN)
SHENG LEIXIANG (CN)
HE DONGSHENG (CN)
LI MENGBO (CN)
ZHENG YAN (CN)
XU LIANGBIN (CN)
FAN BAITAO (CN)
SHENG LEIXIANG (CN)
HE DONGSHENG (CN)
LI MENGBO (CN)
ZHENG YAN (CN)
Application Number:
PCT/CN2022/080894
Publication Date:
June 08, 2023
Filing Date:
March 15, 2022
Export Citation:
Assignee:
CHINA NAT OFFSHORE OIL CHINA CO LTD (CN)
BEIJING RES CENTER OF CNOOC CHINA CO LTD (CN)
BEIJING RES CENTER OF CNOOC CHINA CO LTD (CN)
International Classes:
F15B11/08; E21B34/14; F15B13/04
Foreign References:
| CN114135527A | 2022-03-04 | |||
| CN111663920A | 2020-09-15 | |||
| CN111663921A | 2020-09-15 | |||
| CN109356899A | 2019-02-19 | |||
| CN108775234A | 2018-11-09 | |||
| JP2004340187A | 2004-12-02 | |||
| US10156095B1 | 2018-12-18 |
Attorney, Agent or Firm:
JEEKAI & PARTNERS (CN)
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