Inventors:
- Houston TX, US
William Christian Herben - Magnolia TX, US
Steven Samuel Mitchell - Scottsdale AZ, US
Russell Wayne Koenig - Conroe TX, US
Mark Joshua Miller - Valencia PA, US
Kevin James Rudy - Houston TX, US
International Classification:
E21B 4/02
E21B 28/00
E21B 17/10
E21B 21/10
Abstract:
A vibration assembly includes a valve above a rotor and stator. The rotor rotates within the stator as fluid flows therethrough. The valve includes a rotating valve segment, which rotates with the rotor, and a non-rotating valve segment each including at least one fluid passage. In an open position, the fluid passages of the valve segments are aligned and a fluid flows through the valve. In a restricted position, the fluid passages of the valve segments are partially or completely unaligned, thereby creating a pressure pulse that is transmitted through the drill string or coiled tubing above the valve. The valve may further include an inner sleeve and an outer sleeve surrounding the non-rotating valve segment. The inner and outer sleeves allow axial sliding but prevent rotation of the non-rotating valve segment. The assembly may further include a lower thrust bearing at a lower end of the rotor.