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Conduct a Bore - 142
JT40/JT40 All Terrain Operator’s Manual
Backream
Assemble Backream String
1.
Select backreaming devices. See “Backreamers” on page 166.
2.
Determine fluid rate requirements and install appropriate nozzles to provide sufficient flow. See
“Backream Fluid Requirements” on page 167 and “Nozzles” on page 163.
3.
Attach backreamer to beacon housing if tracking backream.
4.
Install beacon, following beacon instructions for:
•
battery replacement
•
beacon positioning
5.
Install beacon housing lid. See page 164.
6.
Follow beacon instructions to check beacon operation.
7.
Follow tracker instructions to calibrate beacon.
8.
Use quick wrenches to attach transition sub to drill pipe string.
9.
Use quick wrenches to attach backreamer/beacon housing assembly to transition sub.
10. Attach additional pullback devices or product to end of backreamer/beacon housing assembly.
Begin Backream
1.
After backream assembly is attached to pipe, tracker operator should:
•
leave pit and stand away from the exposed drill string.
•
if using DrillLok
®
system, turn on tracker to enable drilling unit thrust/pullback and rotation.
•
if not using DrillLok system, communicate to drill operator that backream string is clear.
2.
Turn on drill fluid and pressurize drill pipe. Verify that jets are open.
3.
Without rotating, slowly pull back until reamer contacts bore hole opening. Do not lodge reamer in
hole.
4.
Begin slow rotation and pullback.
5.
Increase drilling fluid flow and rotation as the backream string enters the ground.
6.
If tracking backream, tracker operator may continue tracking when the backream string is no longer
visible.
Summary of Contents for JT40
Page 1: ...JT40 JT40 All Terrain HRC and LRC Issue 1 0 Original Instruction Operator s Manual 053 2966 ...
Page 79: ...Controls 78 JT40 JT40 All Terrain Operator s Manual Battery Disconnect ...
Page 113: ...Drive 112 JT40 JT40 All Terrain Operator s Manual Shut Down Unit ...
Page 119: ...Transport 118 JT40 JT40 All Terrain Operator s Manual Retrieve ...
Page 147: ...Conduct a Bore 146 JT40 JT40 All Terrain Operator s Manual Remove Pullback Device ...
Page 199: ...Complete the Job 198 JT40 JT40 All Terrain Operator s Manual Stow Tools ...
Page 241: ...Service 240 JT40 JT40 All Terrain Operator s Manual As Needed ...
Page 250: ......
Page 251: ......
Page 253: ...Service Record 252 JT40 JT40 All Terrain Operator s Manual Service Performed Date Hours ...