首页>
外国专利>
EXCAVATING CONDUIT DISCONNECTING METHOD, EXCAVATING CONDUIT DISCONNECTING APPARATUS, AND SEABED EXCAVATING FACILITIES USING THE SAME
EXCAVATING CONDUIT DISCONNECTING METHOD, EXCAVATING CONDUIT DISCONNECTING APPARATUS, AND SEABED EXCAVATING FACILITIES USING THE SAME
展开▼
机译：开挖管道断开方法，开挖管道断开设备以及使用相同方法的开挖设施
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To provide an excavating conduit disconnecting method according to which the vertical vibration of an excavation conduit is easily and effectively reduced when a riser pipe is disconnected, and to provide an excavating conduit disconnecting apparatus and seabed excavating facilities using the same.;SOLUTION: The excavating conduit disconnecting apparatus is formed of: the excavating conduit 7 of a double pipe structure having a drill pipe 3 into which muddy water MW having a specific gravity larger than that of sea water SW is supplied, and the riser pipe 6 arranged outside the drill pipe 3, and connecting between an excavating ship (floating body) floating on the sea, and an excavation port formed in the seabed; a separating device for separating the excavating conduit 7 and the excavation port from each other; a central valve 32 arranged at the longitudinal center of the drill pipe 3, for restricting flowage of fluid; and a sea water supply device for supplying the sea water SW to the drill pipe 3 at a location immediately below the central valve 32. According to the excavating conduit disconnecting method, the excavating conduit 7 is separated from the excavation port, and before and after the separation, the muddy water MW in the drill pipe 3 is replaced by the sea water SW except for the muddy water MW remaining at the longitudinal center of the drill pipe 3.;COPYRIGHT: (C)2007,JPO&INPIT
展开▼
