发明名称 |
Method for manufacturing a drilling tool with an elastomer seal having graded properties |
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.
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申请公布号 |
US7168147(B2) |
申请公布日期 |
2007.01.30 |
申请号 |
US20050177388 |
申请日期 |
2005.07.08 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
SMITH REDD H.;KOLTERMANN TERRY J.;DROBNY JIRI GEORGE |
分类号 |
B23P11/02;E21B10/22;F16J15/00;F16J15/16 |
主分类号 |
B23P11/02 |
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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