Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent
1979-09-24
1982-08-24
Pate, III, William F.
Wells
Means for perforating, weakening, bending or separating pipe...
With disparate below ground feature
166212, 166297, 294 8625, 24263DT, E21B 2902
Patent
active
043456464
ABSTRACT:
A cylindrical downhole chemical jet cutting tool including a generally cylindrical slip body having pipe gripping slips connected to a co-axially disposed expandable piston-cylinder biased toward a retracted position by a return spring; each slip includes a pivoting head pivotally retained by the slip body and biased toward a retracted from deployed position by a garter spring. Each slip defines at least two sets of gripping teeth having different gripping faces such that each gripping face becomes substantially parallel with the tool body axis as the slip becomes deployed a different respective distance from the tool. A slip expansion mandrel disposed within the slip array deploys the slips into gripping engagement as the piston-cylinder is actuated in response to application of fluid pressure. A chemical fluid cutting means including a fluid chamber defined within the tool body between two diaphragms can rupture from application of a designated differential fluid pressure. The fluid jet discharge part of the tool is adapted to direct fluid chemical from said tool body at high velocity.
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patent: 4059150 (1977-11-01), Manderscheid
patent: 4125161 (1978-11-01), Chammas
patent: 4158389 (1979-06-01), Chammas et al.
Gearhart Industries, Inc.
Jackson William D.
Pate III William F.
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