发明名称 |
VERFAHREN ZUR HERSTELLUNG EINES BOHRWERKZEUGS MIT ELASTOMERDICHTUNG MIT ABGESTUFTEN EIGENSCHAFTEN |
摘要 |
A method of forming a seal for a subterranean drilling tool employs irradiation. The seal is formed of a single homogeneous elastomeric material. The seal has an exterior surface with at least one portion that is in sliding engagement with part of a seal gland of the drilling tool. A property gradient is formed in the elastomeric material on at least this portion. The property gradient is formed by exposing the seal to an environment to define a property that changes from a first level to a second level without essentially changing the composition of the elastomeric material. The step of exposing is done by irradiating the seal with an electron beam. |
申请公布号 |
DE602005009719(D1) |
申请公布日期 |
2008.10.23 |
申请号 |
DE20056009719T |
申请日期 |
2005.07.08 |
申请人 |
BAKER HUGHES INC. |
发明人 |
SMITH, REDD H.;KOLTERMANN, TERRY J.;DROBNY, JIRI GEORGE |
分类号 |
E21B10/22;F16J15/16 |
主分类号 |
E21B10/22 |
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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