Patent attributes
A mobile service rig includes an onboard rechargeable electric power storage system (e.g., a battery, supercapacitor, etc.) for powering the rig's hoist and other equipment used for repairing or servicing a well at a wellsite. In some examples, the rechargeable electric power storage system is recharged by an electrical power grid that is normally used for powering a pumping unit at the well. Some examples of the mobile service rig include a diesel powered charging generator for backup power. In some examples, an auxiliary braking generator coupled to the rig's hoist provides regenerative braking to help recharge the electric power storage system. Some examples of the mobile service rig comprise a trailer hitched to a diesel powered tractor.
