A two-stage packer and method for sealing an annulus in a wellbore is provided. The packer may be set by a force which will not cause a sealing element to buckle, collapse, or otherwise fail. In one aspect, the packer comprises a body having a sealing element and shoulder disposed there-around, and
A two-stage packer and method for sealing an annulus in a wellbore is provided. The packer may be set by a force which will not cause a sealing element to buckle, collapse, or otherwise fail. In one aspect, the packer comprises a body having a sealing element and shoulder disposed there-around, and a slideable member slideably arranged on the body, the slideable member having a first surface disposable beneath the element to increase the inner diameter thereof and a second surface disposable against an end of the element to increase the outer diameter thereof. The method comprises running a body into the wellbore, the body comprising a sealing element and a slideable member slideably disposed there-around, wherein the slideable member comprises a first surface and a second surface; forcing the first surface beneath the element to increase the inner diameter thereof; and forcing the second surface against an end of the element to increase the outer diameter thereof.
대표청구항▼
A two-stage packer and method for sealing an annulus in a wellbore is provided. The packer may be set by a force which will not cause a sealing element to buckle, collapse, or otherwise fail. In one aspect, the packer comprises a body having a sealing element and shoulder disposed there-around, and
A two-stage packer and method for sealing an annulus in a wellbore is provided. The packer may be set by a force which will not cause a sealing element to buckle, collapse, or otherwise fail. In one aspect, the packer comprises a body having a sealing element and shoulder disposed there-around, and a slideable member slideably arranged on the body, the slideable member having a first surface disposable beneath the element to increase the inner diameter thereof and a second surface disposable against an end of the element to increase the outer diameter thereof. The method comprises running a body into the wellbore, the body comprising a sealing element and a slideable member slideably disposed there-around, wherein the slideable member comprises a first surface and a second surface; forcing the first surface beneath the element to increase the inner diameter thereof; and forcing the second surface against an end of the element to increase the outer diameter thereof. st and second ports, and the third configuration providing restricted fluid flow between the first and second ports, the valve including: a first valve element including a second fluid communication passage providing the restricted fluid flow between the first and second ports, and a second valve element positionable between first and second locations with respect to the first valve element, the first location of the second valve element substantially permitting the restricted fluid flow through the second fluid communication passage including at least one radial aperture penetrating the first valve element, and the second location of the second valve element occluding the at least one radial aperture and substantially preventing the restricted fluid flow through the second fluid communication passage; and a first resilient element biasing the valve toward the first configuration. 2. The valve structure according to claim 1, further comprising: an actuator displacing the first valve element against the bias of the first resilient element. 3. The valve structure according to claim 2, wherein the actuator comprises an electromagnetic solenoid. 4. A valve structure comprising: a housing including a first fluid communication passage between a first port and a second port; a valve movable with respect to the housing between a first configuration, a second configuration, and an intermediate configuration between the first and second configurations, the first configuration permitting substantially unrestricted fluid flow between the first and second ports, the second configuration substantially preventing fluid flow between the first and second ports, and the intermediate configuration providing restricted fluid flow between the first and second ports, the valve including: a first valve element including a second fluid communication passage providing the restricted fluid flow between the first and second ports; and a second valve element positionable between first and second locations with respect to the first valve element, the first location of the second valve element substantially permitting the restricted fluid flow through the second fluid communication passage, and the second location of the second valve element substantially preventing the restricted fluid flow through the second fluid communication passage; a first resilient member biasing the valve toward the first configuration; and an actuator displacing the first valve element against the bias of the first resilient member, the actuator including an electromagnetic solenoid that operates via a power device such that there is an approximately zero percent power level when the valve is in the first configuration, there is an approximately fifty percent power level when the valve is in the intermediate configuration, and there is an approximately one-hundred percent power level when the valve is in the second configuration. 5. A valve structure comprising: a housing including a first fluid communication passage between a first port and a second port; a valve movable with respect to the housing between a first configuration, a second configuration, and an intermediate configuration between the first and second configurations, the first configuration permitting substantially unrestricted fluid flow between the first and second ports, the second configuration substantially preventing fluid flow between the first and second ports, and the intermediate configuration providing restricted fluid flow between the first and second ports, the valve including: a first valve element including a second fluid communication passage providing the restricted fluid flow between the first and second ports; and a second valve element positionable between first and second locations with respect to the first valve element, the first location of the second valve element substantially permitting the restricted fluid flow through the second fluid communication passage,
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