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Back pressure control devices used to control fluid pressure in a wellbore require various utilities for operation, such as an air supply. With the use of an air supply, the continued operation of one or more back pressure control devices may be achieved when supply of utilities for operation of the...

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Bibliographische Detailangaben
1. Verfasser:	ROGER SUTER
Format:	Patent
Sprache:	por
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	Back pressure control devices used to control fluid pressure in a wellbore require various utilities for operation, such as an air supply. With the use of an air supply, the continued operation of one or more back pressure control devices may be achieved when supply of utilities for operation of the back pressure control devices are intentionally or unintentionally interrupted.