Patent ID: 7878270
Filing Date: 2011-02-01
Classification: E21B

Abstract:
1. A method for connecting a first borehole to a second borehole, wherein the first and second boreholes originate at first and second spaced surface locations, comprising the acts of: drilling an azimuthally-extending directional section of the first borehole extending in a direction closer to the second borehole than the first borehole surface location; and drilling an azimuthally-extending directional section of the second borehole extending in a direction closer to the first borehole than the second borehole surface location, wherein at least the distal portions of the azimuthally-extending directional sections of the first and second boreholes extend in generally aligned relation to one another; drilling an intersecting borehole component from one of the first and second borehole directional sections to the other borehole directional section, to provide an intersection between the first borehole and the second borehole, wherein drilling the intersecting borehole component comprises forming a sidetrack location, and wherein the sidetrack location comprises at least one of a discontinuity, a radius or a bend.