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实用新型
CN201581839U 一种密闭式取心工具 失效 - 权利终止

一种密闭式取心工具
摘要：
本实用新型涉及石油与天然气钻井用的一种密闭式取心工具，由安全接头、取心外筒、取心钻头、压力平衡接头、旋转总成、取心内筒、割心总成组成；安全接头与取心外筒、取心外筒与取心钻头、安全接头与旋转总成、压力平衡接头与旋转总成、旋转总成与取心内筒、取心内筒与割心总成均为螺纹连接，该工具解决了现有技术中存在的双筒双动式取心工具，取心内筒和外筒同时转动，取心内筒转动具有扰动岩心，增加岩心进筒难度的问题。本实用新型可广泛用于石油与天然气钻井作业。
摘要（英）：

The utility model relates to a sealed coring tool for petroleum and natural gas drilling, which consists of a safety joint, an outer barrel, a coring bit, a pressure-balanced joint, a rotating assembly, an inner barrel and a core-cutting assembly; the safety joint is connected with the outer barrel through screw threads, the outer barrel is connected with the coring bit through screw threads, the safety joint is connected with the rotating assembly through screw threads, the pressure-balanced joint is connected with the rotating assembly through screw threads, the rotating assembly is connected with the inner barrel through screw threads, and the inner barrel is connected with the core-cutting assembly through screw threads. The tool solves the problem that in the prior art, since the inner barrel and the outer barrel of the double-barrel double-action coring tool simultaneously rotate, the rotation of the inner barrel can disturb the core, which can increase the difficulty of barrel entry of the core. The utility model can be widely used for petroleum and natural gas drilling operations.

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