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    • 12. 发明授权
    • RCD sealing elements with multiple elastomer materials
    • 具有多种弹性体材料的RCD密封元件
    • US08596345B2
    • 2013-12-03
    • US13070752
    • 2011-03-24
    • Yanmei LiAlan W. LockstedtSudarsanam Chellappa
    • Yanmei LiAlan W. LockstedtSudarsanam Chellappa
    • E21B33/068
    • E21B33/085
    • 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.
    • 公开了一种用于旋转控制装置的密封元件,其中密封元件具有形成沿轴向延伸穿过密封元件的钻柱孔的内表面,附接端具有延伸到基本上平行于钻柱孔的附接端的接收腔, 与安装端相对的鼻端,其中鼻端具有小于附接端的内径的内径,在附接端和鼻端之间的喉部区域,至少一个软弹性体区域,包括软弹性体材料 具有70杜耳或更低的硬度,以及至少一个刚性弹性体区域,其包含硬度大于70杜鲁的硬质弹性体材料。