Electronically-Actuated Cementing Port Collar
First Claim
1. A port collar for use on casing in a borehole, the port collar comprising:
- a housing disposed on the casing and having an internal bore, the housing having at least one exit port communicating the internal bore with the borehole;
an opening valve disposed on the housing and being biased from a closed position to an opened position relative to the at least one exit port;
a first restraint temporarily holding the opening valve in the closed position, the first restraint electronically activated with a first trigger and releasing the opening valve biased to the opened position when activated;
a closing valve disposed on the housing and being biased from an opened position to a closed position relative to the at least one exit port; and
a second restraint temporarily holding the closing valve in the opened position, the second restraint electronically activated with a second trigger and releasing the closing valve biased to the closed position when activated.
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Accused Products
Abstract
A cementing port collar has an opening sleeve biased from a closed position to an opened position relative to the collar'"'"'s exit port, and a first restraint temporarily holds the opening sleeve closed. The collar also has a closing sleeve biased from an opened position to a closed position, and a second restraint temporarily holds the closing sleeve opened. During cementing, the first restraint is electronically activated with a first trigger to release the opening sleeve opened so cement slurry can pass out of the collar'"'"'s exit port to the borehole annulus. When cementing is completed, the second restraint is electronically activated with a second trigger to release the closing sleeve closed to close off the collar to the borehole so the cement can set. The restraints can include bands of synthetic fiber, which are burned by fuses activated by a controller of the collar responding to passage of RFID tags.
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Citations
26 Claims
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1. A port collar for use on casing in a borehole, the port collar comprising:
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a housing disposed on the casing and having an internal bore, the housing having at least one exit port communicating the internal bore with the borehole; an opening valve disposed on the housing and being biased from a closed position to an opened position relative to the at least one exit port; a first restraint temporarily holding the opening valve in the closed position, the first restraint electronically activated with a first trigger and releasing the opening valve biased to the opened position when activated; a closing valve disposed on the housing and being biased from an opened position to a closed position relative to the at least one exit port; and a second restraint temporarily holding the closing valve in the opened position, the second restraint electronically activated with a second trigger and releasing the closing valve biased to the closed position when activated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A port collar for use on casing in a borehole, the port collar comprising:
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a housing disposed on the casing and having an internal bore, the housing having at least one exit port communicating the internal bore with the borehole; an opening valve disposed in the housing and movable from a closed position to an opened position relative to the at least one exit port; a closing valve disposed in the housing and movable from an opened position to a closed position relative to the at least one exit port; and an electronic controller operatively coupled to the opening and closing valves, the electronic controller activating the opening valve from the closed position to the opened position in response to a first trigger, the controller activating the closing valve from the opened position to the closed position in response to a second trigger. - View Dependent Claims (23, 24)
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25. A method of operating a port collar on casing in a borehole, the method comprising:
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holding an opening valve on the port collar biased in a closed position relative to at least one port on the port collar; holding an opening valve on the port collar biased in an opened condition relative to the at least one port; releasing the opening valve biased to the opened position in response to a first trigger downhole at the port collar; and releasing the closing valve biased to the closed position in response to a second trigger downhole at the port collar.
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26. A method of operating a port collar on casing in a borehole, the method comprising:
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responding to a first electronic trigger downhole at the port collar; moving, in response to the first electronic trigger, an opening valve on the port collar from a closed position to an opened position relative to at least one port on the port collar; responding to a second electronic trigger downhole at the port collar; and moving, in response to the second electronic trigger, a closing valve on the port collar from an opened position to a closed position relative to the at least one port.
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Specification