System and method for controlling flow in a wellbore
AssigneeSchlumberger Technology Corporation
InventorDavid James Biddick
Life of this patent
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Abstract
A technique enables control over flow in a wellbore with a flow control system. In some cases, the flow control system may comprise a flapper device, an isolation assembly, and an actuation assembly. The flapper device may be configured to rotate within an approximate angular range from 15° to 75° when shifting between an open and closed state. In some situations, the engaging member may contain a profiled end configured to increase the moment applied to the flapper device during opening and control the rate of closure of the flapper device. The limitation to the angular range of the flapper device may reduce the loading forces that would otherwise act against the flow control system upon closure of the flapper device.
Claims20
A flow control system for use in a wellbore, comprising:
- a flapper device positioned in a well string;
- an engaging member configured to abut a surface of the flapper device and transition the flapper device between a first position and a second position;
- and
- wherein the flapper device is configured to rotate through an angular range of less than 75°.
A flow control system for use in a well bore comprising:
- a flapper device pivotally coupled to a tubular member;
- an engaging member configured to transition the flapper device between a first position blocking a fluid flow path and a second position providing access to the fluid flow path;
- an actuation assembly configured to transition the engaging member between a first position and a second position;
- and
- wherein an angular range defined between the first position and the second position of the flapper device is less than 75°.
A flow control system for use in a wellbore, comprising:
- a flapper device pivotally coupled to a tubular member;
- an engaging member configured to transition the flapper device between a first position blocking a fluid flow path and a second position providing access to the fluid flow path;
- an actuation assembly coupled with the engaging member and configured to transition the isolation assembly between a first position and a second position;
- wherein an angular range defined between the first position and the second position of the flapper device is less than 75°;
- and
- wherein the engaging member comprises a flow tube containing an arcuate profiled end as viewed in a side view in which the profiled end is configured to increase a moment applied to the flapper device by the engaging member as the flapper device is transitioned to the first position.
Dependencies are inferred from the claim text.