Ditch Witch JT920 - Page 103

JT920/JT920L - OPERATION 103
ASSEMBLE BACKREAM STRING
JT920/JT920L - OPERATION 103
ASSEMBLE BACKREAM STRING
Backreaming Tips
• Plan backreaming job before drilling. Plan bore path as
straight as possible. Check bend limits of pullback material.
Check that appropriate pullback devices are on hand.
• Keep all bends as gradual as possible.
• Drilling fluid quality is a key factor in backreaming success.
Contact your Ditch Witch dealer for information on testing
water, selecting additives, and mixing drilling fluid.
• Backreaming requires more fluid than drilling. Make sure
enough fluid is used.
Select Pullback Devices
1. Backreamer - enlarges hole as pipe is pulled back through
bore.
2. Swivel - attached to pullback material through pullback
device; allows pipe, cutter, and expander to rotate without
twisting pullback material.
3. Nozzle - controls fluid flow from backreamer to bore.
Pullback devices are available in a wide variety of sizes and
types. Soil type, size and type of pullback material, and drilling
fluid affect backreamer choice. To determine which combination
will work best at your jobsite, contact your Ditch Witch dealer.
Backreaming Tips
• Plan backreaming job before drilling. Plan bore path as
straight as possible. Check bend limits of pullback material.
Check that appropriate pullback devices are on hand.
• Keep all bends as gradual as possible.
• Drilling fluid quality is a key factor in backreaming success.
Contact your Ditch Witch dealer for information on testing
water, selecting additives, and mixing drilling fluid.
• Backreaming requires more fluid than drilling. Make sure
enough fluid is used.
Select Pullback Devices
1. Backreamer - enlarges hole as pipe is pulled back through
bore.
2. Swivel - attached to pullback material through pullback
device; allows pipe, cutter, and expander to rotate without
twisting pullback material.
3. Nozzle - controls fluid flow from backreamer to bore.
Pullback devices are available in a wide variety of sizes and
types. Soil type, size and type of pullback material, and drilling
fluid affect backreamer choice. To determine which combination
will work best at your jobsite, contact your Ditch Witch dealer.