Flow pulsing method and apparatus for the increase of the rate of drilling

摘要

A simple and economical device is placed in a drill string to provide a pulsating flow of the pressurized drilling fluid to the jets of the drill bit to enhance chip removal and provide a vibrating action in the drill bit itself thereby to provide a more efficient and effective drilling operation. Operation of the device is such that a pronounced negative pulse precedes the positive pulse. Between pulses there is a short time delay and this feature will further enhance drilling rates. Device automatically bypasses all fluid if it is disabled.