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United States of America Patent
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Issued Date -
Oct 2, 2014
app pub date -
Apr 1, 2014
filing date -
Apr 1, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for pushing and pulling rod strings through the ground or an underground pipe. The apparatus has a downhole tool attached to the distal end of the rod string. The push/pull machine has a stationary frame that is placed against the ground to provide a reaction surface. The stationary frame has an opening for the rod string to pass through. A rod gripping assembly is supported on the machine frame and moveable relative to the stationary frame. The rod gripping assembly has a slip bowl, jaws, a thrust member and an actuator. The actuator powers movement of the jaws into the slop bowl to cause a powered gripping of the rod string by the machine. With the rod string gripped a cylinder assembly is activated to push the rod gripping assembly toward the stationary frame thereby pushing the rod string into the ground.
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