Force balanced reciprocating valve
AssigneeBaker Hughes Oilfield Operations LLC
InventorVolker Peters
Life of this patent
Estimating the term…
Abstract
A device for generating pressure pulses includes a valve member disposed in a fluid passageway, the fluid passageway including a restriction, the valve member movable by an actuator relative to the restriction to generate a pressure pulse in a fluid in the fluid passageway based on varying a relative position between the valve member and the restriction and creating a differential pressure across the fluid passageway, the differential pressure applying a first force on the valve member. The device also includes a piston member in hydraulic communication with the differential pressure, the differential pressure applying a second force on the piston member, the piston member having a locomotive mechanical connection to the valve member.
Claims20
A device for generating pressure pulses, the device comprising:
- a valve member disposed in a fluid passageway, the fluid passageway including a restriction, the valve member movable by an actuator relative to the restriction to generate a pressure pulse in a fluid in the fluid passageway based on varying a relative position between the valve member and the restriction and creating a differential pressure across the fluid passageway, the differential pressure applying a first force on the valve member;
- and
- a piston member in hydraulic communication with the differential pressure, the differential pressure applying a second force on the piston member, the piston member having a locomotive connection to the valve member, wherein the actuator includes an electric motor and is configured to apply a third force on the valve member to generate the pressure pulse.
A device for generating pressure pulses, the device comprising:
- a borehole string in a borehole, the borehole string having a bore defining a fluid passageway;
- a fluid circulating though the borehole;
- a bottom hole assembly in the borehole string including a valve member disposed in the fluid passageway, the fluid passageway including a restriction, the valve member movable by an actuator relative to the restriction to generate a pressure pulse in the fluid in the fluid passageway based on varying a relative position between the valve member and the restriction and creating a differential pressure across the fluid passageway, the differential pressure applying a first force on the valve member;
- and
- a piston member in hydraulic communication with the differential pressure, the piston member having an end extending through an opening in the fluid passageway, the differential pressure applying a second force on the piston member, the piston member having a locomotive connection to the valve member, wherein all of the fluid circulating through the borehole passes through the restriction and the opening.
A device for generating pressure pulses, the device comprising:
- a valve member disposed in a fluid passageway, the fluid passageway including a restriction, the valve member movable by an actuator relative to the restriction to generate a pressure pulse in a fluid in the fluid passageway based on varying a relative position between the valve member and the restriction and creating a differential pressure across the fluid passageway, the differential pressure applying a first force on the valve member;
- and
- a piston member in hydraulic communication with the differential pressure, the differential pressure applying a second force on the piston member and moving the piston member in a piston member stroke direction, the piston member having a locomotive connection to the valve member, wherein the locomotive connection is configured to transmit the first force to the piston member and apply the first force to the piston member in a direction opposite a direction of the second force and move the valve member in a valve member stroke direction opposite the piston member stroke direction.
Dependencies are inferred from the claim text.