Core drilling apparatus |
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| 申请号 | US33905273 | 申请日 | 1973-03-08 | 公开(公告)号 | US3804184A | 公开(公告)日 | 1974-04-16 |
| 申请人 | GUSMAN M; NIKITIN G; MARTYSHIN A; MALKIN B; KONSTANTINOV L; EDELMAN Y; | 发明人 | NIKITIN G; EDELMAN Y; GUSMAN M; KONSTANTINOV L; MALKIN B; MARTYSHIN A; | ||||
| 摘要 | Mounted on the exterior of a non-rotatable core barrel is an end of a resilient tape the other end of which extends inwardly into the barrel and is connected to a device for pulling the tape inwardly into the barrel. The apparatus is also provided with an arrangement which forms a sleeve from the tape as this is being pulled into the core barrel. During the coring operation, the tape is being pulled inwardly into the barrel and a sleeve is formed from the tape with the aid of said arrangement to encase and protect the core from disturbance. The coring apparatus is intended for core drilling in soft, unconsolidated and fractured formations. | ||||||
| 权利要求 | 1. A coring apparatus for core drilling comprising a splined expanding joint adapted to be connected to a drill string; a housing attached to said expansion joint with its upper end and connected to a core bit with its lower end; a core barrel arranged inside said coring apparatus and suspended from said housing by means of bearings; a sleeve protecting the core from disturbance embodied in the form of a tape made of resilient material whose one end is mounted on the exterior of said core barrel, the other end extends inwardly into said barrel and the edges are adapted to be joined one with another so as to form a sleeve which encases the core as this is produced and enters the core barrel; a means for pulling said tape inwardly into said core barrel; a clamping arrangement connected to the end of said tape extending inwardly into said core barrel and to said means of pulling said tape inwardly into said core barrel; a means for joining the longitudinal edges of said tape and forming said sleeve from said tape. 2. A coring apparatus according to claim 1 in which said tape for forming said sleeve has thickening along its longitudinal edges in the form of at least one bead arranged parallel to each other; said means for joining said longitudinal edges comprises a longitudinal through slot in said core barrel and slide block rigidly connected to said tape clamping arrangement located inside said core barrel and to said tape beads located outside said core barrel; said slide block moves along said slot while pulling the tape inwardly into the core barrel so as to place said beads on the exterior of said core barrel along said slot and to form said sleeve from said tape. 3. A coring apparatus according to claim 2 in which said core barrel has exterior grooves arranged next to the sides of said slot and engaged, when said tape is pulled inwardly into said core-receiving barrel, by said beads insuring a tight joint between longitudinal edges of said tape. |
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