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
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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.