Method of forming a tubing lined borehole

Details Method of forming a tubing lined borehole Method of forming a tubing lined borehole

E - Fixed Constructions

21

B

E21B 7/28 (2006.01) E21B 10/32 (2006.01) E21B 29/00 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2453980

There is disclosed a method of forming a tubing lined borehole, the method comprising the steps of forming a borehole (10); enlarging part of the borehole (10) by increasing the diameter thereof; and locating bore-lining tubing (12) in the borehole (10) with at least part of the tubing (12) located in the enlarged part (24) of the borehole, and a corresponding a tubing lined borehole. There is also disclosed a downhole rutting tool (26) comprising a tool body (32); and at least one cutting element (28) mounted for radial movement with respect to the tool body (32) between a retracted position and a cutting position, in the cutting position the cutting element (28) describing a cutting diameter and an axially extending annular space (44) inwardly of the cutting element (28), and a corresponding method.

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