Drilling tool with non-synchronous oscillators and method of using same
AssigneeNational Oilwell DHT, L.P.
InventorsMike Rossing, Avinash Hariprasad Cuddapah
Life of this patent
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Abstract
Apparatus and method for drilling a wellbore using non-synchronous oscillators. An apparatus for drilling a wellbore includes a tubing string and a bottom hole assembly coupled to the tubing string. The bottom hole assembly includes a first oscillator and a second oscillator. The first oscillator is configured to restrict fluid flow and induce pressure pulses in the tubing string at a first frequency. The second oscillator is configured to restrict fluid flow and induce pressure pulses in the tubing string at a second frequency. The first frequency is different from the second frequency.
Claims18
Apparatus for drilling a wellbore, comprising:
- a tubing string;
- and
- a bottom hole assembly coupled to the tubing string, the bottom hole assembly comprising:
- a first oscillator configured to restrict fluid flow and induce pressure pulses in the tubing string at a first frequency;
- and
- a second oscillator configured to restrict fluid flow and induce pressure pulses in the tubing string at a second frequency;
- wherein the first frequency is different from the second frequency.
A method for drilling a wellbore, comprising:
- arranging a first oscillator and a second oscillator in a bottom hole assembly;
- positioning the bottom hole assembly in the wellbore via a tubing string coupled to the bottom hole assembly;
- inducing pressure pulses of a first frequency in the tubing string by operating the first oscillator;
- inducing pressure pulses of a second frequency in the tubing string by operating the second oscillator;
- wherein the first frequency is different from the second frequency.
Dependencies are inferred from the claim text.