APPARATUS AND METHODS FOR SEPARATING AND JOINING TUBULARS IN A WELLBORE

WIPO Patent Application WO2002038343

A3

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 cutter 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.

SIMPSON NEIL ANDREW ABERCROMBI
TRAHAN KEVIN OTTO

PCT/GB2001/004950

April 24, 2003

November 08, 2001

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WEATHERFORD LAMB (US)
HARDING RICHARD PATRICK (GB)

E21B23/00; E21B23/01; E21B29/00; E21B33/04; E21B33/14; E21B43/10; (IPC1-7): E21B29/00; E21B43/10; E21B33/04; E21B33/14; E21B17/00

WO2000037766A2	2000-06-29
WO2000037767A2	2000-06-29
WO2001083943A1	2001-11-08
WO2001060545A1	2001-08-23

US1739932A	1929-12-17
US1952652A	1934-03-27
US2695449A	1954-11-30
US1358818A	1920-11-16
US4389765A	1983-06-28
US3498376A	1970-03-03
SU976019A1	1982-11-23
US5787984A	1998-08-04
US6354373B1	2002-03-12
US20020139540A1	2002-10-03
GB2350137A	2000-11-22

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