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公开(公告)号：US06854532B2
公开(公告)日：2005-02-15
申请号：US10716106
申请日：2003-11-17
IPC分类号： B63B21/50 , E21B7/00 , E21B7/12 , E21B7/128 , E21B7/28 , E21B17/20 , E21B19/00 , E21B19/09 , E21B19/22 , E21B21/00 , E21B21/08 , E21B33/076 , E21B43/12
CPC分类号： E21B21/00 , B63B21/502 , E21B7/002 , E21B7/128 , E21B7/28 , E21B17/206 , E21B19/002 , E21B19/09 , E21B19/22 , E21B21/001 , E21B21/08 , E21B33/076 , E21B43/121 , E21B43/122 , E21B2021/006
摘要： The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at the drill bit bottom and returns to the wellhead through an annulus between the tubing and the wellbore carrying the drill cuttings. A fluid return line extending from the wellhead equipment to the drilling vessel transports the returning fluid to the surface. In a riserless arrangement, the return fluid line is separate and spaced apart from the tubing. In a system using a riser, the return fluid line may be the riser or a separate line carried by the riser. The tubing may be coiled tubing with a drilling motor in the bottom hole assembly driving the drill bit. A suction pump coupled to the annulus is used to control the bottom hole pressure during drilling operations, making it possible to use heavier drilling muds and drill to greater depths than would be possible without the suction pump. An optional delivery system continuously injects a flowable material, whose fluid density is less than the density of the drilling fluid, into the returning fluid at one or more suitable locations the rate of such lighter material can be controlled to provide supplementary regulation of the pressure. Various pressure, temperature, flow rate and kick sensors included in the drilling system provide signals to a controller that controls the suction pump, the surface mud pump, a number of flow control devices, and the optional delivery system.
摘要翻译： 本发明提供了用于钻井海底井筒的钻井系统。 钻井系统包括通过海底井口并承载钻头的管道。 钻井液系统将钻井液连续地供应到管道中，该钻井液在钻头底部排放，并通过管道和承载钻屑的井筒之间的环形空间返回到井口。 从井口设备延伸到钻井船的流体回流管将返回的流体输送到表面。 回流流体管线以不连续的方式分开并与管道间隔开。 在使用提升管的系统中，返回流体管线可以是提升管或由提升管携带的单独管线。 管道可以是在驱动钻头的底孔组件中的钻井马达的连续油管。 耦合到环空的抽吸泵用于控制钻井操作期间的井底压力，使得可以使用较重的钻井泥浆和钻头比没有抽吸泵更大的深度。 可选的输送系统将流体密度小于钻井液密度的可流动材料在一个或多个合适的位置连续地喷射到返回流体中，可以控制这种较轻材料的速率以提供对压力的补充调节。 包括在钻井系统中的各种压力，温度，流量和踢脚传感器向控制抽吸泵，表面泥浆泵，多个流量控制装置和可选输送系统的控制器提供信号。
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公开(公告)号：US06415877B1
公开(公告)日：2002-07-09
申请号：US09353275
申请日：1999-07-14
IPC分类号： E21B712
CPC分类号： E21B21/00 , B63B21/502 , E21B7/002 , E21B7/128 , E21B7/28 , E21B17/206 , E21B19/002 , E21B19/09 , E21B19/22 , E21B21/001 , E21B21/08 , E21B33/076 , E21B43/121 , E21B43/122 , E21B2021/006
摘要： The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at the drill bit bottom and returns to the wellhead through an annulus between the tubing and the wellbore carrying the drill cuttings. A fluid return line extending from the wellhead equipment to the drilling vessel transports the returning fluid to the surface. In a riserless arrangement, the return fluid line is separate and spaced apart from the tubing. In a system using a riser, the return fluid line may be the riser or a separate line carried by the riser. The tubing may be coiled tubing with a drilling motor in the bottom hole assembly driving the drill bit. A suction pump coupled to the annulus is used to control the bottom hole pressure during drilling operations, making it possible to use heavier drilling muds and drill to greater depths than would be possible without the suction pump. An optional delivery system continuously injects a flowable material, whose fluid density is less than the density of the drilling fluid, into the returning fluid at one or more suitable locations the rate of such lighter material can be controlled to provide supplementary regulation of the pressure. Various pressure, temperature, flow rate and kick sensors included in the drilling system provide signals to a controller that controls the suction pump, the surface mud pump, a number of flow control devices, and the optional delivery system.
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