D20x22 Series II Navigator HDD
Overview 30-57
A
UTO
D
RILL
- E
NABLE
(R.A.T.T. O
SCILLATION
M
ODE
)
Step 1:
Locate sonde and determine steering direction.
Step 2:
Enable R.A.T.T. Oscillation mode with
R.A.T.T. Mode Key
(1)
.
Selecting R.A.T.T. mode will cause AutoDrill mode to default to Constant Thrust/
Pullback Pressure.
Step 3:
Pull
Rotation Handle
for clockwise rotation. Drill string will oscillate clockwise and
counterclockwise.
Step 4:
Apply desired thrust.
Step 5:
Momentarily press and release
AutoDrill Button
(2)
and immediately release the
Rotation
and
Thrust/Pullback Handles
.
The controller will drive the thrust/pullback pump output to maintain the pressures
at which this mode was initiated.
The
Rotation
and
Thrust/Pullback Handles
must be centered within one second from
the time the
AutoDrill Button
was pressed
, not from the time the button was released.
2
1