The concept in using a pipe rammer to remove a stuck product pipe (bore salvage) or remove stuck drill stems (drill stem recovery) is simple yet effective.
During a drill stem recovery the principle is the same, however, there are two possible tool configurations.
A pneumatic pipe rammer can be a big help on an HDD project in recovering drill stems and product pipe that has become stuck underground when problems arise," says Chris Brahler, president and CEO of TT Technologies.
Hammers are used to assist drill stem recovery projects and provide extra force assist when an HDD machine is attempting to retrieve stuck drill string.
The contractor and TT specialists then decided to use the drill stem retrieval methods.
The trailer comes equipped with added stem racks that can hold up to 32 additional drill stems
The TTMT transmission range was tested in a lab with a series of drill stems linked together.
The TTMT pod digitizes the load cell data with an on-hoard microprocessor and transmits the data by inducing an RF signal through the drill stem to the receiver above ground.
The receiver is designed not to hinder the drill stem as it exits from the ground and is automatically loaded back on the drill rig.
This is why it is recommended that bent drill stems be removed from the machine.
When drill stem is not kept within the limits of its torque range, thrust and pullback limitations, and bending radius, metal fatigue may occur resulting in premature and costly failure.
Makeup and breakout of drill stem joints also imposes stress on the drill stem.