Recuperative Braking Drawworks.

Energy efficiency is a priority objective of the research strategy. Particularly, the energy efficiency of the drillingextraction equipment is an issue of high relevance, the decreasing of energy consumption in crude oil extraction being among the objectives of the research strategy in the oilfield equipment. The paper presents a constructive version for a representative high power drawworks part of an oil and gas drilling rig, with recuperative braking, powered by two asynchronous electric motors. By implementing this concept it is estimated that a significant part of domestic hot water consumption at rig location as well as the heating of the radiators belonging to the drilling rig barracks is recovered by the thermal energy produced by the drawworks braking system. The power saving is about 100 kW by recovering thermal energy produced by the two asynchronous electric motors of the high power drawworks. [ABSTRACT FROM AUTHOR]