发明名称 DRILLING FLANGE AND INDEPENDENT SCREWED WELLHEAD WITH METAL-TO-METAL SEAL AND METHOD OF USE
摘要 A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal ring gasket or two contacting metal surfaces that are machined to required tolerances and are configured to be forced together when the drilling flange is mounted to the wellhead. The metal-to-metal seal ensures a fluid seal between the flange body and the wellhead in the event that the O-rings malfunction or are destroyed by fire.
申请公布号 US2009084538(A1) 申请公布日期 2009.04.02
申请号 US20080330604 申请日期 2008.12.09
申请人 STINGER WELLHEAD PROTECTION, INC. 发明人 MCGUIRE BOB;DALLAS L. MURRAY
分类号 E21B19/00;E21B33/03 主分类号 E21B19/00
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