Erc Industries, Inc.

Jerry D Smith

Floyd J Lane

A method of providing an internal circumferential shoulder in a cylindrical passageway including the steps of forming an enlarged internal diameter groove in the passageway, machining an integral unitary circumferential shoulder blank of external dimensions conforming to the groove, cutting the shoulder blank into at least segments, each segment having opposed end surfaces that match the end surfaces of adjacent segments, the opposed end surfaces of one segment being defined by parallel, spaced-apart planes forming a key segment, positioning the shoulder segments into the groove, the key segment being inserted last and securing the key segment within the groove.

Method of providing an internal circumferential shoulder in a cylindrical passageway

An assembly for sealing the annular space between the inner cylindrical surface of a tubular member and the outer surface of a cylindrical member having a separate upper and lower seal member each of which are sealably and translatably positioned on the cylindrical member outer cylindrical surface, each of the upper and lower seal members having a circumferentially outwardly displaceable sealing lip and including a tubular actuator positioned between the upper and lower seal members having end portions for radially outwardly displacing the upper and lower sealing lips and including a downwardly displaceable seal energizer for moving the upper seal member towards the lower seal member to cause the actuator to concomitantly, radially outwardly expand the circumferential sealing lips.

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The Woodlands, TX, United States of America

Jerry D Smith