Nabors Drilling designs new AC rigs

Nabors Drilling is introducing a new series of programmable AC electric (PACE) rigs. The rigs are being built in North America, the Middle East, and in China, and moving into many markets.The PACE 750 and PACE 1000/1500 designs have slightly different specifications although Nabors is keen to standardize components to improve economies of scale and increase fungibility of components and drill crews (Table 1). Click here to enlarge imageNabors says that AC power provides more accurate control of speed and torque than direct current. AC electrical systems also require less maintenance and facilitate online diagnostic checks of equipment and systems. AC-powered drilling rigs have fewer elec...

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