A well production system including a wellhead and a first casing string supported from a first casing hanger landed on a shoulder in the wellhead bore. A loading shoulder assembly is installable in the wellhead and includes an energizing ring, a loading ring threaded into the interior of the energizing ring, a lock ring, and a hold-down ring threaded into the interior of the loading ring. The hold-down ring engages the first casing hanger to prevent rotation of the hold-down ring and restrain rotation of the loading ring. The lock ring is expandable from an unset position into supporting engagement with the wellhead in a set position upon rotation of the energizing ring. The hold-down ring is also moveable axially out of the loading ring to restrain the first casing hanger.
申请公布号
WO2009120935(A3)
申请公布日期
2009.12.23
申请号
WO2009US38520
申请日期
2009.03.27
申请人
CAMERON INTERNATIONAL CORPORATION;NGUYEN, DENNIS, P.;GUIDRY, KIRK, P.;LIM, HAW, KEAT