VARIABLE VALVE AXIAL OSCILLATION TOOL

An apparatus and method for creating axial movement of a drill string using a variable valve and a controller. In some embodiments, the controller is a proportional-integral-derivative controller.

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Bibliographische Detailangaben
1. Verfasser:	HAY, Charles Richard Thomas
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	An apparatus and method for creating axial movement of a drill string using a variable valve and a controller. In some embodiments, the controller is a proportional-integral-derivative controller.