Patent ID: 9534465
Date: 2017-01-03
CPC Classifications: E21B

Claim:
1. A method of completing a well, comprising: (a) extending a conductor pipe into the well and connecting a riser to an upper end of the conductor pipe with a riser connector, the riser connector sealingly engaging an outer diameter of the conductor pipe and then lowering a wellhead onto a base at an upper end of the well, the wellhead having external threads on an outer diameter; (b) providing a hub with internal threads and an external circumferential stepped recess, and securing the hub to the external threads of the wellhead; (c) providing a blowout preventer assembly with an annular locking member having a plurality of locking elements, landing the blowout preventer assembly on the hub, and engaging the locking elements with the recess; (d) drilling the well through the blowout preventer assembly and restraining at least one hanger within the wellhead with a restraining assembly entirely internal to the wellhead; then (e) removing the blowout preventer assembly and the hub and securing a threaded flange to the external threads of the wellhead, the threaded flange having a plurality of bolt holes spaced around the flange; and (f) bolting a wellhead member to the bolt holes of the threaded flange.