Patent ID: 6035939
Filing Date: 2000-03-14
Classification: E21B

Abstract:
A whipstock system comprisinga body having an upper concave and a lower end,anchor apparatus on the lower end of the body, the anchor apparatus comprisinga movable member releasably connected to the lower end of the body, and movable radially with respect to the lower body,the lower end of the body and movable member initially occupying a first space with a first diameter,the movable member and lower end of the body movable apart from each other outwardly to anchor the whipstock system in a wellbore tubular,a toothed slip on the movable member for engaging an interior surface of the wellbore tubular in which the whipstock system is to be anchored,wherein the lower end of the body has a bar member movably engaged by the lower end of the body member, the bar member movable with respect to the lower end of the body, the bar member movably engaged by the movable member, and the bar member movable with respect to the movable member,wherein the bar member is shear-pinned to the lower end of the body and is shear-pinned to the movable member, andthe upper concave pivotably connected to the body.