Electric well service rig

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 drive wheels. Under battery power, the rig travels overland to service wellbores at various wellsites. Once at a wellsite, a pumpjack at t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	Newman, Frederic M
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CRANES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HAULING HEATING HOISTING LIFTING LIGHTING LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	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 drive wheels. Under battery power, the rig travels overland to service wellbores at various wellsites. Once at a wellsite, a pumpjack at the site is de-energized, and the hoist proceeds to remove and reinstall wellstrings (e.g., tubing and sucker rods). While the pumpjack is de-energized, the rig's onboard rechargeable electric power storage system taps into the electric power source normally used for the pumpjack. The drive wheels and hoist can drain the rig's rechargeable electric power storage system, but the pumpjack's electric power source can gradually recharge it while the rig is servicing the wellbore. Moreover, when the hoist lowers the wellstring back down into the wellbore, the energy generated by that operation is recovered and used for replenishing the rig's rechargeable electric power storage system.