Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate
2005-02-08
2005-02-08
Neuder, William (Department: 3672)
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
C166S384000, C166S055800, C166S207000
Reexamination Certificate
active
06851475
ABSTRACT:
The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubular therearound will be cut into an upper and lower portion. The cutting tool is constructed and arranged to be rotated while the actuated cutters exert a force on the inside wall of the tubular, thereby severing the tubular therearound. In one aspect, the apparatus is run into the well on wireline which is capable of bearing the weight of the apparatus while supplying a source of electrical power to at least one downhole motor which operates at least one hydraulic pump. The hydraulic pump operates a slip assembly to fix the downhole apparatus within the wellbore prior to operation of the cutting tool. Thereafter, the pump operates a downhole motor to rotate the cutting tool while the cutters are actuated.
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“Expandable Slotted Tubes Offer Well Design Benefits”, Metcalfe, P., Petroline Wireline Services Ltd., Hart's Petroleum Engineer International, Oct. 1996, pp. 60-63.
U
Simpson Neil A. A.
Trahan Kevin O.
Moser, Patterson & Sheridan L.L.P.
Neuder William
Weatherford / Lamb, Inc.
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