Abstract: A steel pipe is welded to a threaded connector that has an end with a desired nominal inner diameter. A swage is forced over an end of the pipe, reducing an outer diameter and an initial inner diameter of the end of the pipe. A die is then forced into the end of the pipe, the die having an outer diameter sized to increase the inner diameter of the end of the pipe to the nominal inner diameter of the end of the connector. A weld groove is machined on the end of the pipe and the ends are abutted and welded at the weld grooves.

Abstract: A steel pipe is welded to a threaded connector that has an end with a desired nominal inner diameter. Initially, the inner diameter of the steel pipe may be out of a tolerance range of the nominal inner diameter of the connector. A swage is forced over an end of the pipe, reducing an outer diameter and an initial inner diameter of the end of the pipe. The swage is dimensioned to provide the end of the pipe with an inner diameter that is less than the nominal inner diameter of end of the connector. A die is then forced into the end of the pipe, the die having an outer diameter sized to increase the inner diameter of the end of the first tubular member to the nominal inner diameter of the end of the second tubular member. A weld groove is machined on the end of the pipe and the ends are abutted and welded at the weld grooves.

Abstract: A subsea wellhead structure including a casing hanger having an exterior downwardly facing shoulder for landing within a well bore, a central bore, means for connecting a casing thereto, an upper exterior surface tapering downwardly and outwardly, and an external surface below said shoulder tapering downwardly and inwardly for centering said hanger on landing, a seal assembly with a metal seal sleeve having downwardly extending fingers, an internal metal annular bulbous sealing surface and an external metal cylindrical sealing surface, means for latching said seal sleeve in sealing position, a protector sleeve and means for releasably securing said protector sleeve to said seal assembly and said latching means, the latching means including retaining means preventing premature setting or movement of the latching means prior to the setting of said sealing means.