GENWAY INVENTION PATENT
Eccentric Hole Bit
Invented for integrated screen installation, replacing traditional open-close bits.
An eccentric guide passage and asymmetrical multi-wing structure reduce the uncertainty associated with mechanical opening and closing in complex coal seams.
WHY IT WAS INVENTED
From Mechanical Uncertainty to a Simpler Patented Structure
One clear comparison: the limitations of traditional open-close bits on the left, and GENWAY’s eccentric-hole alternative on the right.
LEGACY APPROACH / TRADITIONAL OPEN-CLOSE BIT
Traditional Open-Close Bit
Opening and closing must complete reliably underground. In soft, broken or unstable seams, that dependency introduces avoidable uncertainty.
- 01Jamming or incomplete opening
- 02Insufficient expansion can compromise bore formation and screen installation
- 03More moving parts increase stoppage, retrieval and maintenance risk
GENWAY INVENTION PATENT / ECCENTRIC-HOLE BIT
Eccentric-Hole Bit
A patented alternative that removes the opening-and-closing mechanism from the critical underground sequence.
APPLICATION & RANGE
Application Conditions & Range
Soft or broken coal seams, integrated screen installation, and the documented Φ94–Φ133 mm range define the primary application window.
FORMATION
Soft / Broken Coal Seams
Designed for soft or broken coal seams requiring stable drilling and direct screen installation.
SIZE RANGE
Φ94–Φ133 mm
Available diameter range: Φ94–Φ133 mm.
APPLICATION
Integrated Screen Installation
Continuous drilling and direct screen installation reduce tool-change trips.
STANDARD CASE
Standard Application Case
A standard application example for integrated drilling and direct screen installation in soft or broken coal seams.
STANDARD CASE · INTEGRATED SCREEN INSTALLATION
Soft / Broken Coal Seam
Integrated Screen Installation
Integrated drilling and direct screen installation using an Eccentric Hole Bit in soft or broken coal seams.
- Project Location
- Soft / broken coal seam roadway
- Equipment
- Mining drilling rig with matched drill-string connection
- Diameter / Depth
- Φ94–Φ133 mm · Depth matched to project
- Result
- Continuous drilling and screen installation with fewer tool-change trips
Application results depend on formation, rig parameters, and operating practice.
FAQ
Frequently Asked Questions
What issue does it address compared with a traditional open-close bit?
It is designed to reduce risks associated with jamming, incomplete blade opening, and related stoppage.
Is this product covered by a GENWAY invention patent?
Yes. GENWAY invention patent ZL201910392360.3 covers the documented integrated eccentric structure.
What application range is currently documented?
The documented application range covers soft or broken coal seams and Φ94–Φ133 mm diameters.
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