公开(公告)号：US4040264A

公开(公告)日：1977-08-09

申请号：US635843

申请日：1975-11-28

申请人： Claude R. Neilon

发明人： Claude R. Neilon

IPC分类号： E21B17/01 ,  E21B7/12

CPC分类号： E21B17/012

摘要： An underwater riser system in which the primary riser is surrounded by lengths of jacket pipe which form annular buoyancy chambers, there being a pressure fluid supply connected to the buoyancy chambers via valve means including at least a pressure differential valve which controls the amount of water displaced from the chamber by the pressure fluid. Advantageously, the valve means for each chamber also includes remotely controlled means by which the amount of buoyancy provided by the chamber can be varied at will, e.g., from a positive buoyancy to a buoyancy less than the operating weight of the portion of the riser system with which that chamber is associated. In best embodiments, the lengths of jacket pipe are interconnected into a continuous structural unit by connectors each having a female connector member secured to the upper end of the lower length of jacket pipe and a male member secured to the lower end of the upper length of jacket pipe, the female member having an annular bulkhead which closes the space between the jacket and primary riser pipe and on which the valve means is mounted.

摘要翻译： 一种水下立管系统，其中主提升管被形成环形浮力室的套管的长度包围，通过阀装置连接到浮力室的压力流体供应装置包括至少一个控制排水量的压差阀 从室内受压力流体。 有利地，每个室的阀装置还包括远程控制的装置，通过该远程控制装置，腔室提供的浮力的量可以随意改变，例如，从正的浮力到浮力小于提升管系统的部分的操作重量 与该室相关联。 在最佳实施例中，护套管的长度通过连接器相互连接成连续的结构单元，连接器各自具有固定到护套管的较短长度的上端的阴连接器构件，以及固定到上长度的下端 护套管，阴构件具有环形隔板，其封闭护套和主提升管之间的空间，并且安装有阀装置。