Hydraulic perforating tool and method of operation thereof
CN122106449APending Publication Date: 2026-05-29CHINA NAT PETROLEUM CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2024-11-28
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing downhole perforation tools cannot automatically retract in the event of an abnormal power outage, posing a risk of downhole jamming and failing to quickly release contact with the tubing or casing.
Method used
A hydraulic drilling tool was designed, which uses a hydraulically driven push arm and drilling piston. Through the combination of normally closed solenoid valves and normally open solenoid valves, it is ensured that the tool is fixed downhole when energized and quickly released when energized to avoid jamming.
Benefits of technology
It enables rapid disconnection from the tubing or casing during downhole operations, even in the event of a power outage, preventing jamming and ensuring the safe retrieval of tools.
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Smart Images
Figure CN122106449A_ABST
Abstract
The application belongs to the technical field of oil logging, and discloses a hydraulic perforating tool and a working method thereof, which comprises a shell, a drilling cutter holder rotatably connected to the shell, and a drill bit assembly slidably connected to the drilling cutter holder; a hydraulic drive push arm and a push arm hydraulic cylinder are connected to the shell on the two sides of the drill bit assembly; a hydraulic pump assembly and a hydraulic oil containing cavity are further arranged in the shell; a hydraulic oil outlet of the hydraulic pump assembly is communicated with a hydraulic oil inlet of a drilling piston and a hydraulic oil inlet of the push arm hydraulic cylinder through an output oil path; a normally closed electromagnetic valve is arranged on the output oil path at the hydraulic oil outlet side of the hydraulic pump assembly; a hydraulic oil outlet of the drilling piston and a hydraulic oil outlet of the push arm hydraulic cylinder are communicated with the hydraulic oil containing cavity through a return oil path; and a normally open electromagnetic valve is arranged on the return oil path at the side of the hydraulic oil containing cavity. When the application is used in downhole operation, if an accident such as sudden power failure occurs, the downhole fixing can be quickly released to prevent the tool from being stuck in the downhole.
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