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    • 48. 发明申请
    • ROTATING SUPERHARD CUTTING ELEMENT
    • 旋转超级切割元件
    • WO2016122438A1
    • 2016-08-04
    • PCT/US2015/012855
    • 2015-01-26
    • HALLIBURTON ENERGY SERVICES, INC.
    • DUNBAR, Bradley DavidATKINS, William BrianHARWELL, Roddy
    • E21B10/26E21B10/42E21B10/62
    • E21B10/573E21B10/55E21B10/5673E21B10/5676E21B2010/545
    • Systems and methods are disclosed for a rotating superhard cutting element. The rotating cutting element includes a substrate comprising a rotating portion and a stable portion. The stable portion has a cavity and is configured to be fixed to a blade of a drill bit. The rotating cutting element further includes a retainer that rotatably secures the rotating portion of the substrate in the cavity of the stable portion of the substrate, and a cutting layer on the rotating portion of the substrate. The cutting layer has a plurality of cutting surfaces. One of the plurality of cutting surfaces has a property different from another one of the plurality of cutting surfaces. The cutting layer is configured to rotate with respect to the stable portion of the substrate and use one of the plurality of cutting surfaces based on a characteristic of a formation to be cut.
    • 公开了用于旋转超硬切割元件的系统和方法。 旋转切割元件包括包括旋转部分和稳定部分的基底。 稳定部分具有空腔并且被构造成固定到钻头的刀片。 旋转切割元件还包括保持器,其将基板的旋转部分可旋转地固定在基板的稳定部分的空腔中,以及在基板的旋转部分上的切割层。 切割层具有多个切割面。 多个切割面之一具有与多个切割面中的另一切割面不同的特性。 切割层被构造为相对于基板的稳定部分旋转,并且基于要切割的地层的特征使用多个切割表面中的一个。
    • 50. 发明申请
    • SYSTEMS AND METHODS FOR WELL CONTROL DURING MANAGED PRESSURE DRILLING
    • 管理压力钻井期间的井控系统和方法
    • WO2016040272A1
    • 2016-03-17
    • PCT/US2015/048858
    • 2015-09-08
    • BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    • VAN OORT, EricVAJARGAH, Ali KarimiHOXHA, Besmir B.
    • E21B21/08
    • E21B21/08
    • A method for well control during managed pressure drilling includes detecting an influx in a wellbore, where the wellbore includes a drill string and an annulus. The method also includes calculating an initial size of the influx, determining a maximum surface pressure due to removal of the initial size of the influx, determining a maximum circulating pressure in the annulus due to the initial size of the influx, calculating an estimated formation pressure due to the initial size of the influx, determining an increase in a flow rate of a pump that is expected to arrest the influx event, where the pump is configured to pump a drilling fluid into the drill string, and directing the pump to increase the flow rate until a flow rate into the drill string is approximately equivalent to a flow rate out of the annulus.
    • 在管理的压力钻井期间的井控制的方法包括检测井眼中的流入,其中井眼包括钻柱和环形空间。 该方法还包括计算流入的初始尺寸,确定由于去除入口的初始尺寸而导致的最大表面压力,由于流入的初始尺寸确定环空中的最大循环压力,计算估计地层压力 由于流入的初始尺寸,确定期望阻止流入事件的泵的流量的增加,其中泵构造成将钻井流体泵送到钻柱中,并且引导泵增加 直到进入钻柱的流量的流量大约相当于环空中的流速。