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An accurate determination of weight and torque at the bit is essential to maximize drilling performance and to reduce overall cost. With the increase in complexity of wells for oil and gas production, efficient drilling is becoming extremely important. Due to complex wellbore geometry and dynamics resulting from drilling action and formation properties, energy losses have increased tremendously. Such...
In today's operations for oil and gas exploration and production the drilling systems are commonly subjected to dynamic dysfunctions that can compromise the quality of the wellbore, increase the time spent on the job, and result in downhole tool failures. Measurement of downhole dynamics is traditionally performed using tools located in the drillstring above the drill bit. Until recently, obtaining...
The history of oilwell drilling includes a number of innovative techniques to infer the conditions down-hole and their impact on drilling performance. Surface and down-hole sensors have been deployed to measure related physical phenomena that can be generally associated with the actual environment. Some direct measurements have been made after drilling using sensors suspended on a wire line, and this...
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