发明申请
- 专利标题: RCD SEALING ELEMENTS WITH MULTIPLE ELASTOMER MATERIALS
- 专利标题(中): RCD密封元件与多种弹性体材料
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申请号: US13070752申请日: 2011-03-24
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公开(公告)号: US20120118559A1公开(公告)日: 2012-05-17
- 发明人: Yanmei Li , Alan W. Lockstedt , Sudarsanam Chellappa
- 申请人: Yanmei Li , Alan W. Lockstedt , Sudarsanam Chellappa
- 申请人地址: US TX Houston
- 专利权人: SMITH INTERNATIONAL, INC.
- 当前专利权人: SMITH INTERNATIONAL, INC.
- 当前专利权人地址: US TX Houston
- 主分类号: E21B33/06
- IPC分类号: E21B33/06 ; E21B33/068
摘要:
A sealing element for a rotating control device is disclosed, wherein the sealing element has an inner surface which forms a drillstring bore extending axially through the sealing element, an attachment end having a receiving cavity extending into the attachment end substantially parallel with the drillstring bore, a nose end opposite from the attachment end, wherein the nose end has an inner diameter smaller than the inner diameter of the attachment end, a throat region between the attachment end and the nose end, at least one soft elastomer region comprising a soft elastomer material having a hardness of 70 duro or less, and at least one stiff elastomer region comprising a stiff elastomer material having a hardness greater than 70 duro.
公开/授权文献
- US08596345B2 RCD sealing elements with multiple elastomer materials 公开/授权日:2013-12-03