WHIPSTOCK ASSEMBLY AND ASSOCIATED METHOD OF INSTALLING THE WHIPSTOCK ASSEMBLY

The invention relates to a whipstock assembly (10), and an associated method of installing the whipstock assembly (1). The whipstock assembly (1) is configured for installation in a well (1), the whipstock assembly (10) comprising a housing (13) extending in a longitudinal direction, wherein the whipstock assembly (10) comprises: - a whipstock device (11) with an inclined surface (12) located in an upper part of the housing (13) for deflecting a drill string (4); - an anchoring device (14) below the whipstock device (11), the anchoring device (14) having a run state and a set state, and wherein in the run state the anchoring device (14) is configured to be run into the well (1) and in the set state the anchoring device (14) is configured to anchor against an inner wall (2) of the well (1); - a sealing device (15) below the whipstock device (11), the sealing device (15) having a run state and a set state, and wherein in the run state the sealing device (15) is configured to be run into the well (1) and in the set state the sealing device (15) is configured to seal against the inner wall (2) of the well (1); - an activation device (20) for actuating the anchoring device (14) from the run state to the set state and for actuating the sealing device (15) from the run state to the set state; - a locking device (30) operable between: o a first position in which the locking device (30) prevents activation of the activation device (20); and o a second position in which the locking device (30) allows activation of the activation device (20) thereby forcing the anchoring device (14) to the set state and the sealing device (15) to the set state.