- 专利标题： Controlled closing pattern packing unit for blowout preventer
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申请号： US48331174申请日： 1974-06-26
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公开(公告)号： US3917293A公开(公告)日： 1975-11-04
- 发明人: LEWIS GEORGE E , MURMAN FERNANDO
- 申请人： HYDRIL CO
- 专利权人： Hydril Co
- 当前专利权人： Hydril Co
- 优先权： US48331174 1974-06-26
- 主分类号： E21B33/06
- IPC分类号： E21B33/06 ; F16J15/40 ; B65D53/00
摘要：
An annulus of elastomeric material in a well blowout preventer packer unit is differentially anchored about the packer axis, in order to reduce the stress levels in the elastomeric material during its inward flow toward the axis. In addition, packer inserts incorporate differently formed webs and end plates to facilitate the sought advantages.
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