公开(公告)号：US3874465A

公开(公告)日：1975-04-01

申请号：US40292073

申请日：1973-10-02

申请人： RANDOLPH CO

发明人： YOUNG JOHN WALLACE ,  FIRKINS ROBERT CHARLES ,  RING GREGG ,  TATUM JR JOHN A

IPC分类号： E21B25/02 ,  E21B25/06 ,  E21B25/10 ,  E21B25/00

CPC分类号： E21B25/06 ,  E21B25/02 ,  E21B25/10

摘要： A formation coring apparatus suitable for coring relatively soft formations which apparatus includes a core barrel with an interior surface having properties similar to synthetic rubber and two semitubular rigid portions joined along at least one of the adjacent edges by a flexible material, a core catcher having a plurality of flexible segments adapted to open while the core is being drilled and to close with the segments supporting the core thereabove to recover the core, a coring bit and a wire line tool adapted to carry the core barrel and the core catcher into position within the coring bit and having a fishing neck to be engaged by a wire line device for recovery, a latch for retaining the tool in position within the coring bit, a swivel allowing the core barrel and catcher to remain stationary while the coring bit is rotated and a check valve allowing fluid flow from the top of the core barrel because of the entry of the core therein to flow out the tool while preventing inflow of fluids into the top of the tool.

摘要翻译： 一种适用于取芯相对软结构的地层取芯装置，该装置包括具有类似于合成橡胶的性质的内表面的芯筒和通过柔性材料沿着至少一个相邻边缘连接的两个半管状刚性部分，具有 多个柔性段适于在钻芯被打开时打开并且与支撑其上方的芯的段关闭以恢复芯;取芯钻头和线线工具，其适于将芯筒和芯捕集器运送到 取芯钻头并具有用于恢复的线路装置的钓鱼颈部，用于将工具保持在取芯钻头内的适当位置的闩锁，允许芯筒和捕集器在取芯钻头旋转时保持静止的旋转件，并且 单向阀允许流体从芯筒的顶部流出，因为其中的芯进入以防止流入而流出工具 的液体进入工具的顶部。