Ditch Witch JT922 - Manual (Page 87)

Conduct a Bore - 86
JT922 Operator’s Manual
Surface Drill Head
CMW
Surface Drill Head
1. Guide drill head to target pit or up through surface. Make all bends gradual. See “Recommended
Bend Limits” on page 58.
2. Clean area around exit point.
3. If using tracker control mode, tracker operator turns off tracker to disable drilling unit thrust/pullback
and rotation hydraulics. Tracker operator waits for green light to enter pit and change tools.
If not using tracker control mode, tracker operator signals to drilling unit operator to stop engine before
changing downhole tools.
4. Turn fluid flow control to off position as soon as drill head emerges.
5. Clean drill head especially around threads.
6. Disconnect EZ-Connect joint or use quick wrench to remove drill head. Keep threads clean. See
“Quick Wrench” on page 114.
Moving tools will kill or injure. Shut off drill string power when anyone can
be struck by moving or thrown tools. Never use pipe wrenches on drill string.
Turning shaft will kill you or crush arm or leg. Stay away.
NOTICE:
• Tracker operator and drill operator should maintain two-way communication.
• Keep everyone clear of the exposed drill string.
• No one should enter pit until clear communication is given by the drill operator that the drill unit is
shut down. If using tracker control, do not enter pit until tracker control is turned off and green light
on drill unit is lit.
• Drill operator should be instructed to discontinue drill string rotation as soon as drill bit exits the
bore. Use thrust only to extend drill string beyond exit hole.