Patent ID: 9004159
Filing Date: 2015-04-14
Classification: E21B

Abstract:
1. A system for facilitating drilling of a lateral wellbore, comprising: a drilling assembly with a steerable drilling assembly, the drilling assembly including a cutting implement having cutters arranged and designed to enable both milling through a casing and at least partially drilling a lateral wellbore during a single downhole trip; a whipstock having a face with a profile arranged and designed to guide the cutting implement during milling of the casing, the whipstock also having an anchoring device coupled thereto to secure the whipstock at a desired downhole position in a wellbore; and an attachment member releasably coupling the cutting implement to the whipstock, the attachment member coupling to the cutting implement through a recess disposed in the cutting implement and coupling to the whipstock through an opening disposed in the whipstock, the attachment member being held within the recess of the cutting implement by a removable retainer, the attachment member further being arranged and designed to: