Drilling apparatus including a fluid bypass device and methods of using same

US9598920B2 · kind B2 · utility

Assignee

• Baker Hughes Holdings LLC · US

Inventors

• Ingo Roders · Seelze, DE
• Thorsten Regener · Celle, DE

Key dates

• Filing date: Aug 11, 2015
• Grant date: Mar 21, 2017
• Expiry date: Aug 11, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D7/0617
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method and apparatus for drilling a wellbore is disclosed. The wellbore is drilled 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. The flow rate of the fluid is altered to a second flow rate. A time period is defined and a mechanical motion of the bypass device is initiated. A parameter related to the mechanical motion of the bypass device and a parameter related to flow rate are detected. The bypass device is activated to divert a portion of the fluid to the annulus when the parameter related to mechanical motion is detected and the parameter related to flow rate is present during the defined time period.