Patent ID: 6182760
Filing Date: 2001-02-06
Classification: E21B

Abstract:
A tool apparatus useful for drilling supplementary boreholes emanating from a pre-existing borehole extending to a previously-produced fluid reservoir, said apparatus comprising:a duct assembly comprising a plurality of joined duct sections, said duct assembly extending towards said fluid reservoir when said duct assembly is located within said well;a plurality of whipstocks attached to said duct assembly, wherein at least one of said whipstocks is proximate to said fluid reservoir when said duct assembly is located within said well; anda plurality of separators attached to at least two of said duct sections such that separators attached to adjoining duct sections are longitudinally spaced-apart, said separators form at least two channel segments for guiding a drill string within said channel segments towards one of said whipstocks.