D20x22 Series II Navigator HDD
Operation 50-37
Step 5:
Position or support trailing drill string to relieve bending load at the joint where reamer will be
installed.
Step 6:
Use a compact remote power breakout device to loosen joint.
Resuming Operation
Step 1:
Remove breakout device and ensure no tools are attached to drill string.
Step 2:
Press
Run Button
on transmitter
and hold for 2 seconds
to enable drilling operation to resume.
Step 3:
Ensure everyone is away from entire length of the drill string, then use drill unit to slowly reverse
rotate the drill string until the two halves are fully separated.
Step 4:
Separate the two drill strings far enough for reamer installation.
Step 5:
Use correct lockout procedure.
•
“Lockout Procedure - With Remote Lockout,”
•
“Lockout Procedure - Without Remote Lockout System,”
Step 6:
Install reamer and swivel.
Step 7:
Attach rod recycler adapter to drill rod and then attach to swivel.
Step 8:
Follow Step 3 through remaining steps of “Short-String Method of Adding Drill Rod for Pre-Reaming.”
Refer to
WARNING:
If there is a bending load at the joint, the drill rods on both sides of the joint could move
suddenly when the joint is separated. Serious injury could occur if you are struck.
DANGER:
Wrench on rotating drill string can strike you. Death or serious injury
will result. Ensure all tools are removed from the drill string before rotation is
started.
