发明名称 |
Well blowout preventer, and packing element |
摘要 |
A well blowout preventer packer unit is characterized by long life, and induced back to front (radial) rubber feeding between metallic inserts to close on well pipe for producing a pressure gradient against the pipe which is greatest at the bottom of the packer extent engaging the pipe, and lowest at the top of the packer extent engaging the pipe.
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申请公布号 |
US4461448(A) |
申请公布日期 |
1984.07.24 |
申请号 |
US19810277341 |
申请日期 |
1981.06.25 |
申请人 |
HYDRIL COMPANY |
发明人 |
HUEY, WAI;MURMAN, FERNANDO;MATSUDA, EUGENE |
分类号 |
E21B33/06;(IPC1-7):E21B33/06 |
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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