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公开(公告)号：EP2616634A1
公开(公告)日：2013-07-24
申请号：EP11824360.9
申请日：2011-09-15
CPC分类号： E21B33/12 , E21B33/1208 , E21B33/13 , E21B33/134 , E21B33/16
摘要： A grout plug 10 for plugging a drill hole 20 in a mine. The plug 10 comprises an elongate sleeve 12 of porous material adapted to be received in a drill hole 20 and a volume of dry grout material 14 in particulate form. The plug 10 also comprises a liner 16 of water-soluble material, the liner 16 being provided within the porous sleeve 12 for containing the grout material 14 within the porous sleeve 12 in its dry form. In use, when the plug 10 is exposed to water the liner 16 dissolves and the water mixes with the grout material 14 to form a slurry which can seep through the porous sleeve 12 when the plug 10 is tamped into the drill hole 20 to block the drill hole 20 when the grout material 14 cures. A related clay plug is also described having a central core of substantially solid material of low permeability which forms a substrate against which the clay material may cure.
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公开(公告)号：EP3094814B1
公开(公告)日：2019-08-07
申请号：EP14877624.8
申请日：2014-12-22
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公开(公告)号：EP3094814A1
公开(公告)日：2016-11-23
申请号：EP14877624.8
申请日：2014-12-22
CPC分类号： E21B33/12 , E21B33/1204 , F16L55/1141 , F42D1/18
摘要： A plug (10) for blocking off mining exploration drill holes. The plug (10) comprises an elongate body (12) of solid impervious material, and an engineered surface (14) is provided on an external circumference of the elongate body (12). The engineered surface (14) comprises an annular anchoring groove (16) having a ramp (18) extending from a maximum diameter to a minimum diameter of the engineered surface (14) in a braking direction, in which it is intended to prevent movement of the plug (10) in the drill hole. The plug (10) also comprises an O-ring (20) received in the anchoring groove (16) and having a thickness whereby it protrudes slightly above the maximum diameter of the engineered surface (14) and engages with a wall (22) of the drill hole. In use, when the plug (10) is moved in the braking direction in the drill hole, the O-ring (20) rolls up the ramp (18) and wedges between the engineered surface (14) and the wall (22) of the drill hole to provide a braking action for the plug (10) against the wall (22) of the drill hole.
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