Slotted face wellbore deviation assembly

A wellbore deviation assembly for lowering into a wellbore on a drill string for orientating and anchoring the wellbore deviation assembly in the wellbore in a single trip by manipulating the drill string, comprising:

• a whipstock, adapted for securing to an anchor packer, having a back side, a tool face, a top, a bottom, and a longitudinal central axis, and wherein said top section of said whipstock further includes opposed substantially planar side walls extending between said back side and said tool face and extending along the length of said lop section in generally parallel relation to said longitudinal central axis of said whipstock;
• an elongate setting slot formed in said whipstock having a rear wall, a front side, an apex and a base, extending into said whipstock from said tool face thereof and extending from near said top of said whipstock toward said bottom thereof, terminating about midway between said top and said bottom of said whipstock wherein said rear wall of said elongate setting slot is generally parallel to said back side of said whipstock and with said rear wall generally positioned near said longitudinal central axis of said whipstock, such that said front side of said elongate setting slot is an opening within said tool face of said whipstock and such that said base of said elongate setting slot is generally perpendicular to both said rear wall of said elongate setting slot and said back side of said whipstock and wherein said elongate setting slot has opposed side walls extending from said top thereof to said base thereof, said opposed side walls extending between said back wall and said tool face, generally disposed on either side of said longitudinal central axis of said whipstock and extending between said top of said whipstock toward said bottom thereof with said elongate setting slot capable of accepting a rectilinear setting tool releasably secured within said elongate setting slot with said rectilinear setting tool to be secured to the drill string;
• a retrieval slot having opposed side walls, a bottom wall and a top wall, and extending from said rear wall of said elongate setting slot to said back side of said whipstock such that said opposed side walls of said retrieval slot form an extension of said opposed side walls of said elongate setting slot, with said retrieval slot capable of accepting a retrieval tool to be secured to the drill string;
• a deflector assembly having a back side and a tool face, said deflector being attached to said top of said whipstock above said apex of said elongate setting slot such that said back side of said deflector assembly forms an extension of said back side of said whipstock and such that said tool face of said deflector assembly forms an extension of said tool face of said whipstock;
• a hinge section located within said whipstock near said bottom end thereof, said hinge section dividing said whipstock into a top section and a bottom section, and wherein said hinge section contains hinge means rotating about a line of rotation parallel to said tool face and perpendicular to said longitudinal central axis and offset from said longitudinal central axis towards said tool face;
• a cut-a-way formed in the center of the back side of said whipstock, having an upper end disposed within the upper one-third of said top section and a lower end disposed within the lower one-half of said bottom section;
• an upper hydraulic passageway running from said upper end of said cut-a-way to said tool face;
• and,
• a base hydraulic passageway running from said lower end of said cut-a-way to a hollow base located with said bottom section of said whipstock.