Single trip cement thru open hole whipstock

A method of cementing an openhole wellbore through a whipstock and creating a sidetrack in a single trip is disclosed, the method comprising: setting an open hole anchor of an assembly connected to a drill string within an open hole portion of the wellbore, the assembly comprising a mill selectively connected to an upper end of the whipstock by a shearable device, a snorkel tube positioned within a bore of the mill and positioned within a bore of the whipstock, and the open hole anchor, wherein the drill string is connected to the mill; pumping cement down the drill string and through the snorkel tube and the open hole anchor to cement a portion of the open hole wellbore; shearing the shearable device to release the mill from the upper end of the whipstock; releasing the snorkel tube from the bore of the mill after pumping cement down the drill string and after releasing the mill from the upper end of the whip stock; moving the mill uphole within the wellbore; milling a portion of the snorkel tube that extends above the whipstock; engaging a diverting surface of the whipstock with the mill; and cutting the sidetrack in the wellbore with the mill.