Compact HDD Installations Available From Keyhole

February 2012, Vol. 67 No. 2

“Once the bore is completed, the drill head is removed using a disconnect wrench and a backreamer/swivel is installed with the product pipe attached,” said Brahler. “In the automated pullback mode, the drill handles all functions needed to backream and removes the drill string. Drill rods are pulled back and fed to the handling chamber for the operator to remove.”

TT Technologies, Aurora, IL, was established more than 45 years ago and initially supplied pneumatic piercing tools. The company has evolved into a leading manufacturer of trenchless construction equipment with a product line covered by more than 200 worldwide patents and includes pipe pulling, pipe ramming, pipe bursting, sliplining and horizontal directional drilling equipment.

TT Technologies, (800) 533-2078,

Grundopit-K Specifications

Thrust, (push/pull) 8,924 pounds
Rotational torque 625 foot pounds
Max service size 2½ inches
Drilling speed 50 feet per hour, depending on conditions
Minimum Keyhole size 24 inches
Standard depths 2 to 5 feet
Hydraulic power 6½ gpm – 2,900 psi
Basic machine weight 1,510 pounds