Method and apparatus for retaining a core sample within a coring tool
    3.
    发明授权
    Method and apparatus for retaining a core sample within a coring tool 有权
    用于将芯样品保持在取芯工具内的方法和装置

    公开(公告)号:US06729416B2

    公开(公告)日:2004-05-04

    申请号:US09832606

    申请日:2001-04-11

    IPC分类号: E21B1002

    CPC分类号: E21B49/06 E21B25/10

    摘要: A core sample retaining sleeve is provided for preventing loss of a cut core sample from the distal end of a coring bit, particularly during retraction of the coring bit to within the coring tool. Preferably, the core sample retaining sleeve is disposed concentrically within the coring bit to fit around the received core sample. The core sample retaining sleeve has one or more retaining fingers formed on the distal end of the coring bit. The retaining fingers are selectively closeable, preferably by urging the one or more retaining fingers against one or more guide members. A guide member is preferably provided as a stationary ridge on the inner, distal surface of the coring bit. The core sample is contained and protected within the closed retaining sleeve.

    摘要翻译: 提供芯样品保持套筒,用于防止从取芯钻头的远端损失切割的芯样品,特别是在将取芯钻头缩回到取芯工具内时。 优选地,芯样品保持套筒同心地设置在取芯钻头内以适合接收的芯样品。 芯样品保持套筒具有形成在取芯钻头的远端上的一个或多个保持指状物。 优选地,通过将​​一个或多个保持手指推靠在一个或多个引导构件上,保持指状物可选择性地关闭。 引导构件优选地设置在取芯钻头的内表面上的固定脊。 核心样品被封闭并保护在封闭的保持套筒内。