30-56 Overview
D20x22 Series II Navigator HDD
A
UTO
D
RILL
- E
NABLE
(N
ORMAL
D
RILLING
)
Step 1:
Select AutoDrill mode (Constant Thrust/Pullback Speed, Constant Thrust/
Pullback Pressure, or Constant Rotation Pressure) using
AutoDrill Selector
Switch
(2)
.
Step 2:
Move and hold
Rotation
and
Thrust/Pullback Handles
to obtain the desired
rotation and thrust/pullback motion for the current drilling conditions.
Step 3:
Momentarily press and release
AutoDrill Button
(1)
and immediately release the
Rotation
and
Thrust/Pullback Handles
. When the
AutoDrill Button
(1)
is
pressed, the present thrust/pullback and rotation pressure set points are stored.
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.
Step 4:
Use
Speed/Pressure
Trim Switch
(3)
to increase or decrease the speed/pressure
settings. Holding the
Trim Switch
for 2 seconds initiates a process of ramping
speed/pressure up or down.
If the R.A.T.T. mode has been activated, then the display will show the current
oscillating degree setting.
Step 5:
Move either
Rotation
or
Thrust/Pullback Handles
out of NEUTRAL
to stop drill
string motion and PAUSE AutoDrill.
1
2
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