Back to results
US 11,892,861 B2Granted
Autonomous flow control device with pilot amplified operations, method, and system
AssigneeBaker Hughes Oilfield Operations LLC
InventorOscar Becerra Moreno
Life of this patent
Estimating the term…
Abstract
An autonomous flow control device with pilot amplification includes a primary valve responsive to changes in fluid composition, and a pilot valve responsive to and more sensitive to changes in fluid composition than the primary valve and configured to aid change in position of the primary valve in the event of a change in fluid composition.
Claims16
An autonomous flow control device with pilot amplification comprising:
- a pilot valve having a moving member and responsive to fluid density or viscosity;
- a primary valve configured to change in position in response to a change of position of the pilot valve;
- and
- a first chamber and a second chamber, the primary valve being exposed at one operational end thereof to the first chamber and at an opposite operational end to the second chamber, the primary valve responsive to pressure differential between the first and second chambers, wherein pressure in the second chamber rises when the pilot valve changes from a more open position to a more closed position, during use.
1 more element
A wellbore tool comprising:
- a housing;
- a filter disposed at the housing to allow filtered fluid to pass within the housing;
- a pilot valve in the housing having a moving member and responsive to fluid density or viscosity of the filtered fluid;
- a primary valve in the housing configured to change in position in response to a change of position of the pilot valve;
- and
- a first chamber and a second chamber, the primary valve being exposed at on operational end thereof to the first chamber and at an opposite operational end to the second chamber, the primary valve responsive to pressure differential between the first and second chambers, wherein pressure in the second chamber rises when the pilot valve changes from a more open position to a more closed position, during use.
3 more elements
An autonomous flow control device with pilot amplification comprising:
- a pilot valve having a moving member and responsive to fluid density or viscosity;
- a primary valve configured to change in position in response to a change of position of the pilot valve;
- and
- a first chamber and a second chamber, the primary valve being exposed at one operational end thereof to the first chamber and at an opposite operational end to the second chamber, the primary valve responsive to pressure differential between the first and second chambers, wherein a rising pressure in the second chamber causes the primary valve to move toward a closed position, during use.
1 more element
Dependencies are inferred from the claim text.