Underground coal mine hydraulic fracturing device
By designing a sealing tube device for hydraulic fracturing in coal mines, the combined structure of rubber expansion ring and top rod is used to solve the problem of the sealing device sliding and exiting under extremely high pressure, ensuring smooth construction and improving safety.
CN222668186UActive Publication Date: 2025-03-25JUNLIAN CHUANMEI FURONG XINWEI COAL IND CO LTD
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Patent Information
- Application Number
- CN202420960438.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-05-07
AI Technical Summary
Technical Problem
The existing hole sealers are prone to slip and exit under extremely high pressure, affecting the smooth progress of hydraulic fracturing construction and bringing safety hazards.
Method used
A hydraulic fracturing device under the coal mine was designed, using components such as sealing tubes and spray heads, wire expansion tubes, rubber expansion rings and limit guide holes. Through the expansion of the rubber expansion ring and the extension of the top rod, the sealing device is ensured to be firmly in place under extremely high pressure.
Benefits of technology
It effectively prevents loosening and exit problems caused by extremely high pressure of the hole sealer, so that the hydraulic fracturing construction can be carried out smoothly and improves construction safety.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model discloses a coal mine underground hydraulic fracturing device which comprises a hole sealing insertion pipe, a spray head is arranged at the output end of the hole sealing insertion pipe, a steel wire expansion pipe is further connected to the end, opposite to the spray head, of the hole sealing insertion pipe, and a valve port is formed in the inner side of the rear end of the hole sealing insertion pipe. An annular groove is formed in the position, located at the front end of the position of the valve port, of one circle of the outer side of the hole sealing insertion pipe and communicates with an inner cavity of the hole sealing insertion pipe, and a rubber expansion wrapping ring is arranged on the inner side of the annular groove and blocks the bottom face of the inner side of the annular groove. A plurality of limiting guide holes located at the rear end of the valve port are formed in a circle of the outer side of the hole sealing insertion pipe, and ejector rods can gradually stretch out of the limiting guide holes under the matching action of pistons and water pressure, so that the outer ends of the ejector rods are firmly embedded in the rock wall of a hole in an abutting mode; and under the mutual cooperation, the problems of loosening and withdrawing of the hole packer caused by extremely high pressure can be effectively prevented, so that the hydraulic fracturing construction can be smoothly carried out.
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