Downhole progressive gas pre-extraction directional hole drilling system and method in broken soft coal seam
A soft coal seam and directional hole technology, applied in directional drilling, gas discharge, drill pipe, etc., can solve the problems of large drilling engineering volume and long time for gas drainage to reach the standard during the construction period, so as to improve the hole forming depth and reduce the standard cycle Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment
[0037] see figure 1 According to the present invention, the underground progressive gas pre-pumping directional hole drilling method in broken soft coal seams comprises the following working steps:
[0038] Step 1: Drill site 1 layout. The drilling site 1 is arranged in the coal mining roadway 2, close to the side of the working face 3 to be mined, and the distance between the drilling sites 1 is 30-50m;
[0039] Step 2: Orientation hole 4 design. The directional hole 4 is perpendicular to the coal mining roadway 2, the opening point is located in the drilling site 1, and the stabilizing hole sections are arranged in parallel at intervals of 5m; The displacement fluctuates with the ups and downs of the broken and soft coal seam 6, the length of the directional hole 4 ≥ the width of the working face 3 to be mined + the width of the coal roadway 5 to be excavated + the lead distance; the inclination and azimuth of the trajectory design of the directional hole 4 every 3m from t...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com