A wellhead assembly comprising: a casing; a first tubular member mounted over the casing; a first tubular member flange extending from the first tubular member; a generally elongate annular member suspended in the first tubular member, said annular member having a first end portion extending above the first tubular member and a second end portion below the first end portion; a secondary flange extending from the elongate annular member; a plurality of fasteners fastening the secondary flange to the first tubular member flange; and a production tubular member aligned with the elongate annular member, wherein an axial force acts on the generally elongate annular member and is reacted in both the first tubular member flange and the secondary flange. view more

A wellhead assembly as recited in claim 1 wherein the first tubular member comprises an inner surface having an annular lip, wherein said annular lip extends between the elongate annular member second end portion and a portion of the production tubular member. view more

A wellhead assembly as recited in claim 2 wherein said annular lip extends radially inward defining an opening having a first diameter, wherein the elongate annular member first end portion comprises an inner surface having a second diameter and wherein the portion of the production tubular member comprises an inner surface having a third diameter, wherein said first, second and third diameters are equal. view more

A wellhead assembly as recited in claim 1 further comprising a seal between the elongate annular member second end portion and the first tubular member.

A wellhead assembly as recited in claim 4 wherein the seal is between the elongate annular member second end portion and a first inner surface section of the first tubular member, wherein the first tubular member comprises a second inner surface section immediately above and concentric with the first inner surface section, said second inner surface section having a diameter greater than the first inner surface section. view more

A wellhead assembly as recited in claim 6 further comprising a passage through the elongate annular member providing access to an inner surface of the elongate annular member at a location between the seals from a remote location on the outer surface of the elongate annular member. view more

A wellhead assembly as recited in claim 4 further comprising: a plurality lock screws each radially threaded through the first tubular member flange and engaging at least a depression formed on the elongate annular member outer surface, wherein the elongate annular member flange is fastened to the first tubular member flange. view more

A wellhead assembly as recited in claim 1 wherein an end of the elongate annular member is aligned with and faces an end of the production tubular member, wherein an inner surface diameter of said end of said elongate annular member is about equal to an inner surface diameter of said end of said production tubular member. view more

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