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1. (WO2001081714) METHOD AND APPARATUS FOR FORMING LATERAL DRAINS IN WELLBORES

Pub. No.:    WO/2001/081714    International Application No.:    PCT/GB2001/001848
Publication Date: Nov 1, 2001 International Filing Date: Apr 26, 2001
IPC: E21B 7/06
E21B 7/18
E21B 23/01
E21B 41/00
E21B 47/024
Applicants: RESERVOIR RECOVERY SOLUTIONS LIMITED
REAPER, Alan
PATERSON, Andrew
DREELAN, Michael
LEITCH, Andrew
Inventors: REAPER, Alan
PATERSON, Andrew
DREELAN, Michael
LEITCH, Andrew
Title: METHOD AND APPARATUS FOR FORMING LATERAL DRAINS IN WELLBORES
Abstract:
A method and apparatus for inserting a working platform (19) into a wellbore, where the working platform is for subsequent use in creating an aperture in a casing of the wellbore, and/or for subsequent use in creating a borehole into the wellbore. The working platform is run into the wellbore and is provided with a sensor operable to indicate the depth and orientation of the sensor/working platform within the wellbore. The working platform is then set within the wellbore. A cutter is then run into the wellbore, and engaged with the working platform, and is operated to create an aperture in the casing (7). A drain former (133) is operated to form the required number of drains.