Importance

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Abstract

Surface casing stabilizer and hanger means includes a downwardly tapered and inwardly inclined annular outer surface and a concentric, contoured inner annular surface. The surface casing hanger and stabilizer engages and supports surface casing in a conductor pipe and connects the surface casing to the conductor pipe. In practicing the method, the conductor pipe is first positioned in the earth's surface and a well bore drilled therethrough to the desired depth for receiving the surface casing, which surface casing is then lowered into the well bore. Cement is then discharged through the surface casing to fill the annulus between the surface casing and the conductor pipe. While the cement is soft and before it hardens, the conductor pipe's upper end is cut off at the desired elevation and the surface casing then elevated to enable the surface casing stabilizer and hanger means to be engaged therearound. The surfacing casing and the stabilizer hanger means thereon are then lowered into the upper end of the conductor pipe so that the annular downwardly tapered outer surface of the stabilizer hanger means and the weight of the surface casing flare or swedge the upper end of the conductor pipe and form a bowl to conform with, receive and seat the stabilizer hanger means which in turn holds the surface casing and connects it and the conductor pipe together so as to transmit drilling vibrations and loads to the earth's surface and thereby inhibit cracking of the surface casing.

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First Claim