Method and apparatus for setting a whipstock

In a method for setting a whipstock onto a packer in a wellbore, the improvement comprising providing a coiled tubing injection unit carrying coiled tubing for insertion into a well conduit in said wellbore, providing at one end of said coiled tubing a tool combination comprising an accelerator tool followed by a jar tool followed by a setting tool which setting tool carries said whipstock that is to be set onto said packer, said accelerator tool being connected to said coiled tubing and the remaining tools being carried below said accelerator in the order aforesaid, said whipstock being carried by said setting tool by a shear means, passing said tool combination into said wellbore by said coiled tubing until said whipstock is set on said packer, said jar tool being such that when actuated it delivers a sudden jarring impact to said setting tool, actuating said jar tool after said whipstock is set onto said packer to shear said shear means and physically separate said setting tool from said whipstock, and employing said accelerator tool to enhance said jarring impact on said setting tool and essentially insulate said coiled tubing from said jarring impact.