■ Application scope
Deep Hole Directional Drilling Rig is specifically designed to drill especially long directional drilling borehole in explosive underground environments. It is MA certified and currently operating in Chinese regularly drilling sub-horizontal direction holes in excess of 2000 meters.
■ Structural characteristics
When combined with our real-time survey tools (MWD), modular electrical connected cable assembly (MECCA) drill rod, mud pump crawler, directional drill bits and downhole motor, the system has the ability to track, guide and precise control borehole trajectory to accomplish the most challenging drilling requirements.
Deep Hole Directional Drilling Rig has a compact footprint mounted on tracks. Integrated drill unit combined with a feed frame that tilt can be adjusted from -10 degree to +20 degree. With features of high rotary torque (the rated torque is 12000N.m) and powerful push/pull force (max push/pull force is 250kN), the drill is capable for precise directional drilling operations in excess of 2000 meters. A maximum depth of 2311 meters borehole with 15 sidetracks was accomplished in Nov, 2017 Baode Coal Mine, Shenhua Group, one of the largest underground coal mines in the world. We believe this is the new depth record of underground sub-horizontal in-seam directional drilling.
Application of the rig includes directional drilling operations for gas drainage, water detection or discharge, grout injection, exploration of geological structure, detection of seam thickness, water injection into coal seam, etc. Technical parameters are listed in following table.
■ Technical specification
| Type | ZDY12000LD |
Rated torque (Nm） | 12000~3000 |
Rotary speed (r/min) | 50~150 |
Braking torque (Nm） | 2000 |
Max push/pull force (kN) | 250 |
Feed-frame tilt angle (°) | -10~20 degrees |
Dimension (L×W×H)/m | 4.2×1.6×1.9 |
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