Table
T5. Hammer drill drilling test data, Hole 1104C attempt.
Time
(UTC)
|
Flow rate
(gpm)
|
Pressure
(psi)
|
Weight
on bit
(lb)
|
Rotary
speed
(rpm)
|
Torque
(ft-lb)
|
Notes
|
1310
|
100
|
90
|
10,000
|
15
|
2,000
|
Hammer not
cycling
|
|
125
|
150
|
10,000
|
15
|
2,000
|
Hammer not
cycling
|
|
175
|
250
|
10,000
|
15
|
2,000
|
Hammer not
cycling
|
|
200
|
290
|
10,000
|
15
|
2,000
|
Hammer not
cycling
|
|
250
|
400
|
10,000
|
15
|
2,000
|
Hammer not
cycling
|
|
190
|
10
|
|
|
|
Lift bit off
bottom to open by-pass and flush hammer, lower bit back
to seafloor
|
|
100
|
60
|
10,000
|
0
|
0
|
Hammer not
cycling
|
|
150
|
180
|
10,000
|
0
|
0
|
Hammer not
cycling
|
|
200
|
280
|
10,000
|
0
|
0
|
Hammer not
cycling
|
1345
|
|
|
|
|
|
Switch to
pump 1 to confirm downhole, POOH
|
Notes:
Water depth = 739 mbrf; bit = SDS concentric.