Patent ID: 9260921
Filing Date: 2016-02-16
CPC Classification: E21B

Claim Text:
1. A system for drilling multiple lateral wellbores extending outwardly from a parent wellbore during a single trip into the parent wellbore, the system comprising: a valve interconnected in a casing string positioned in the parent wellbore, the valve including a displaceable closure device which selectively permits and prevents access and fluid communication between an interior of the casing string and multiple openings formed through a sidewall of the valve, whereby in a first position the closure device permits access and fluid communication between the interior of the casing string and a first opening and prevents access and fluid communication between the interior of the casing string and a second opening, in a second position the closure device permits access and fluid communication between the interior of the casing string and the second opening and prevents access and fluid communication between the interior of the casing string and the first opening, in a third position the closure device permits access and fluid communication between the interior of the casing string and both of the first and second openings, and in a fourth position the closure device prevents access and fluid communication between the interior of the casing string and both of the first and second openings; an orienting device connected to the casing string with a predetermined azimuthal and longitudinal orientation relative to the openings; and a diverter assembly which includes an indexing device and a diverter device which diverts a drilling assembly from the interior of the casing string through the openings, wherein cooperative engagement between the diverter assembly and the orienting device aligns the diverter device with the first opening during the single trip into the parent wellbore, and wherein the indexing device aligns the diverter device with the second opening during the single trip into the parent wellbore.