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公开(公告)号：US09334711B2
公开(公告)日：2016-05-10
申请号：US14163617
申请日：2014-01-24
CPC分类号： E21B33/03 , E21B19/00 , E21B21/00 , E21B21/08 , E21B21/10 , E21B33/085 , E21B33/13 , E21B36/001 , E21B43/10 , E21B47/06 , E21B47/065 , E21B2021/006
摘要： A Drill-To-The-Limit (DTTL) drilling method variant to Managed Pressure Drilling (MPD) applies constant surface backpressure, whether the mud is circulating (choke valve open) or not (choke valve closed). A sensor measures the temperature in a cavity defined by a rotating control device “RCD” first sealing element and second sealing element, an inner member and a tubular. The RCD cavity is cooled by communicating/supplying or calculating/cooling fluid to the RCD cavity.
摘要翻译： 钻井到钻井（DTTL）的钻井方法变量为管理压力钻井（MPD），施加恒定的表面背压，泥浆是否循环（阻塞阀打开）（阻塞阀关闭）。 传感器测量由旋转控制装置“RCD”第一密封元件和第二密封元件，内部构件和管状物限定的空腔中的温度。 通过向RCD腔进行连通/供应或计算/冷却流体来冷却RCD空腔。
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公开(公告)号：US09845653B2
公开(公告)日：2017-12-19
申请号：US15132998
申请日：2016-04-19
IPC分类号： E21B21/00 , E21B33/03 , E21B33/08 , E21B43/10 , E21B33/13 , E21B36/00 , E21B21/08 , E21B19/00 , E21B21/10 , E21B47/06
CPC分类号： E21B33/03 , E21B19/00 , E21B21/00 , E21B21/08 , E21B21/10 , E21B33/085 , E21B33/13 , E21B36/001 , E21B43/10 , E21B47/06 , E21B47/065 , E21B2021/006
摘要： A Drill-To-The-Limit (DTTL) drilling method variant to Managed Pressure Drilling (MPD) applies constant surface backpressure, whether the mud is circulating (choke valve open) or not (choke valve closed). Because of the constant application of surface backpressure, the DTTL method can use lighter mud weight that still has the cutting carrying ability to keep the borehole clean. The DTTL method identifies the weakest component of the pressure containment system, such as the fracture pressure of the formation or the casing shoe leak off test (LOT). With a higher pressure rated RCD, such as 5,000 psi (34,474 kPa) dynamic or working pressure and 10,000 psi (68,948 kPa) static pressure, the limitation will generally be the fracture pressure of the formation or the LOT. In the DTTL method, since surface backpressure is constantly applied, the pore pressure limitation of the conventional drilling window can be disregarded in developing the fluid and drilling programs.
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公开(公告)号：US10053943B2
公开(公告)日：2018-08-21
申请号：US15171549
申请日：2016-06-02
IPC分类号： E21B33/03 , E21B33/06 , E21B33/08 , E21B33/068
CPC分类号： E21B33/06 , E21B33/068 , E21B33/085
摘要： An annular seal having a sealing member and method for use is provided for sealing an item of oilfield equipment. The annular seal has an inner diameter for receiving the item of oilfield equipment and a frame. The seal member is contiguous with the frame. The annular seal is configured for durability, in that it resists wear, inversion, increases lubricity, enables tightness, and/or otherwise generally increases endurance, toughness, and/or permanence.
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