| 摘要 |
Wireline core barrel fixing mechanism incorporating a fixer which prevents any wireline core barrel deformations, fixes the wireline core barrel to the hollow drill bit, and signals any drilling process interruptions. The wireline core barrel fixer comprises a cylindrical hollow body adapted to be mounted within the drill bit and incorporating selectively operated rollers for locking the hollow body to the drill, the rollers being mounted in planes parallel to each other and perpendicular to the geometrical axis of the cylindrical hollow body. The upper end of the fixer is connected to a cap, in the lower part of which opposite longitudinal slots are cut. The fixer is mounted inside a cylindrical hollow body, the upper end of which is connected to the stopper bar and in its lower part a locking bar and a set nut are mounted, connected to the fixer. The lower end of the cylindrical hollow body is threaded, and on the thread a longitudinally extending extensible and compressible spring body is fastened, the lower end of the spring body gripping a signal stem. On the end of signal stem there is mounted a sealing ring, and under it there is mounted a bearing assembly carrying a core-receiving and gripping barrel. The entire assembly of cap, hollow body, slit spring body, and core barrrel carrying a drill core is selectively pulled up out of the hollow drill pipe string by means of a wire or rope attached to the cap.
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