Overdrilling apparatus

Details Overdrilling apparatus Overdrilling apparatus

2011-06-21

2011-06-21

Stephenson, Daniel P (Department: 3676)

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

C175S053000

Reexamination Certificate

active

07963723

ABSTRACT:
An apparatus for overdrilling a buried line includes a rotatably driven thrust linkage and/or traction linkage, and has a forward end which is connected to a ring-shaped to hollow cylindrical overdrilling head which embraces the line. The overdrilling head is provided interiorly with a centering protrusion for spontaneous centering of the overdrilling head in concert with the line.

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patent: 2386767 (2003-09-01), None
patent: WO 02053866 (2002-07-01), None

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