Abstract
Abstract Drilling operators continually experience increasing pressure to achieve all objectives safely and at the lowest cost. Powered rotary steerable systems (RSS), applied within the correct drilling environment, can improve rate of penetration (ROP), lower risks, and reduce non-productive time (NPT), which can decrease drilling costs. Using through motor telemetry (TMT) technology, a wired motor with a hollow rotor and flex shaft, allows a connection between rotary steerable systems (RSS) and logging while drilling (LWD) downhole tools. A conductor passes power and communication through the motor to operate and steer the RSS. The wired power section uses a uniform wall thickness stator design that reduces heat production and retention. It also delivers higher rev/min and torque directly to the RSS and bit. Using the TMT powered RSS not only has improved ROP, but has also mitigated stick-slip vibration and reduced NPT. The NPT improvements have been identified in areas, such as slip-stick vibration, drill string failures, drill string torque variations, casing wear, and rig equipment failures. Early planning and risk assessment have also been key. Experience across the globe, both on and offshore, are presented to show the benefits of integrating advanced drilling technologies, such as TMT powered RSS and real-time downhole measurements with effective planning, to reap tangible benefits from drilling optimization. With improved performance as a result of increased torque capacity and bit speed, and reduction of the stick-slip mechanism, this new motor-driven rotary steerable technology has delivered superior performance and improved ROP in challenging medium and hard formations. After more than 10,000 drilling hours and nearly half a million feet drilled, TMT powered RSS technology is setting new records and exceeding benchmarks by bringing greater horsepower to the rock destruction process with longer runs and higher ROPs.
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