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首页> 外文会议>SPE/IADC drilling conference >New Drilling Technology Reduces Torque and Drag by Drilling a Smooth and Straight Wellbore
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New Drilling Technology Reduces Torque and Drag by Drilling a Smooth and Straight Wellbore

机译：新的钻探技术通过钻出光滑平直的井眼来减少扭矩和阻力

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Torque and drag can be critical issues in drilling directionalwells especially in extended reach drilling (ERD). During wellplanning, torque and drag must be projected to ensure the rig’srotating and hoisting equipment are adequately sized and toevaluate the limits for slide-oriented drilling motors.Depending upon formations, typical open hole friction factors(FF) used in simulation range from 0.22 in oil base mud to0.35 in water based mud. These friction factors are scaled to ahigher value than those measured in the field in order toaccount for tortuosity created by drilling assemblies.A new drilling technology has been developed with theobjective to reduce torque and drag by drilling a smooth andstraight wellbore. The technology involves extended-gauge bitdesign with a matched steerable motor system or a point-thebitrotary steerable system. Friction factor was studied forNorth Sea‘s wells drilled by the conventional motor systemsand by new drilling systems. Significant reductions in theactual friction factors and the tortuosity index have been seenfrom the wells drilled by the new drilling systems.
机译：扭矩和阻力可能是钻井定向井中的关键问题，特别是在大范围钻井（ERD）中。在进行规划时，必须预测扭矩和阻力，以确保钻机的旋转和吊装设备具有足够的尺寸并评估滑动导向钻机的极限值。根据地层的不同，模拟中使用的典型裸眼摩擦系数（FF）的范围为0.22在油基泥浆中加入0.35的水基泥浆。这些摩擦系数被缩放到比现场测量的摩擦系数更高的值，以解决钻井组件产生的曲折。已开发了一种新的钻井技术，目的是通过钻凿光滑平直的井眼来降低扭矩和阻力。该技术涉及具有匹配的可转向电机系统或点位旋转可转向系统的宽轨位设计。研究了通过常规电机系统和新钻井系统对北海油井的摩擦系数。从新的钻井系统钻出的井中已经看到，实际摩擦系数和曲折指数显着降低。

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