Patent ID: 9598920
Date: 2017-03-21
CPC Classifications: E21B,G05D

Claim:
1. A method of drilling a wellbore, comprising: drilling the wellbore with a drill string that includes a bypass device having a fluid passage therethrough by supplying a fluid through the bypass device at a first flow rate, wherein the fluid circulates to a surface location via an annulus between the drill string and the wellbore; altering the flow rate of the fluid from the first flow rate to a second flow rate; defining a time period; initiating a mechanical motion of the bypass device; detecting downhole a parameter related to the mechanical motion of the bypass device and detecting a parameter related to flow rate; providing one of a first sensor for determining the parameter related to flow rate and a second sensor for determining the parameter related to mechanical motion of the bypass device; and activating the bypass device to divert a portion of the fluid to the annulus when the parameter related to mechanical motion of the bypass device is detected and the parameter related to flow rate is present during the defined time period.