System for sealing the intersection between a primary and a...

Details System for sealing the intersection between a primary and a... System for sealing the intersection between a primary and a...

E - Fixed Constructions

21

B

E21B 17/00 (2006.01) E21B 7/06 (2006.01) E21B 7/08 (2006.01) E21B 41/00 (2006.01)

Patent

CA 2257611

A system for sealing the intersection between a primary borehole and a branch borehole comprises a primary casing section which in use is located in the primary borehole in the region of the branchpoint and a branch casing section which is secured to the primary casing section and is located in the branch borehole. The primary casing section is a tubular which defines a slant surface which intersects a central axis of the tubular at an acute angle, so that the primary casing section can be pressed towards the branchpoint by means of a hollow whipstock or other wedge-shaped element.

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