Batteries are used at every stage of oil production, from exploration drilling to refinery operations support. However, there is one application that places extreme demands on the integrity and performance of cells - the measurement-while-driiling tool. Les Hunt reports. Vertically drilled oil wells are a thing of the past -modern oil exploration drilling is a three-dimensional activity, as oil companies strive to reap the maximum potential from their prospects. But directional drilling brings its own set of problems, not least being the need to convey vital information such as inclination and position of the boring tool. In addition, there are numerous other parameters, such as drill bit condition, its rotational speed, torque, temperature and so on that have to be conveyed in real time to the surface operators.
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