发明名称 |
Annular packing unit and insert |
摘要 |
A packer unit and packer insert adapted for use in an annular blowout preventer. The packer insert includes a generally longitudinal web with its leading edge facing the axial bore of the packing unit sloping from top to bottom in a generally radially outward direction.
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申请公布号 |
US4657263(A) |
申请公布日期 |
1987.04.14 |
申请号 |
US19840670132 |
申请日期 |
1984.10.19 |
申请人 |
HYDRIL COMPANY |
发明人 |
HYNES, JOSEPH H.;BURTON, JAMES A. |
分类号 |
E21B33/06;(IPC1-7):F16J15/12 |
主分类号 |
E21B33/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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