Method of locating wellbore casing collars using...

Details Method of locating wellbore casing collars using... Method of locating wellbore casing collars using...

E - Fixed Constructions

21

B

E21B 29/02 (2006.01) E21B 43/119 (2006.01) E21B 47/09 (2006.01)

Patent

CA 2299176

A method for sensing the location of a casing collar within a wellbore and for orientating a tool circumferentially and radially employs the use of a compact dual-purpose magnet. The method includes offsetting the position of the magnet relative to the tool's centerline to carry out the magnet's purpose of orientating the tool. An inductive pickup coil is placed within the magnet's magnetic field to carry out the magnet's second purpose of sensing the location of a casing collar. The method is used in logging the location of casing collars, splitting casing collars, and perforating casings.

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