Magnetically coupled safety valve with satellite outer magnets
First Claim
1. A safety valve for use in a subterranean well, the safety valve comprising:
- a housing surrounding a longitudinal flow passage;
multiple longitudinal chambers positioned in a space between an outer perimeter of the flow passage and an exterior of the housing; and
multiple first magnetic devices, each of the first magnetic devices being reciprocably disposed in a corresponding one of the chambers,wherein displacement of the first magnetic device in a first direction permits flow of fluid through the flow passage and displacement of the first magnetic device in a second direction opposite the first direction prevents flow of fluid through the flow passage.
1 Assignment
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Accused Products
Abstract
A magnetically coupled safety valve with satellite outer magnets. A safety valve includes a housing having multiple chambers extending longitudinally in a pressure bearing wall of the housing, and multiple magnetic devices, each of the magnetic devices being reciprocably disposed in a corresponding one of the chambers. Another safety valve includes multiple first magnetic devices, a second magnetic device magnetically coupled to the first magnetic devices, with the first magnetic devices being circumferentially spaced apart and encircling the second magnetic device. Yet another safety valve includes a housing having a pressure bearing wall, and multiple magnetic devices, each of the magnetic devices being reciprocably disposed in the housing wall, and each of the magnetic devices being completely surrounded by the housing wall.
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Citations
27 Claims
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1. A safety valve for use in a subterranean well, the safety valve comprising:
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a housing surrounding a longitudinal flow passage; multiple longitudinal chambers positioned in a space between an outer perimeter of the flow passage and an exterior of the housing; and multiple first magnetic devices, each of the first magnetic devices being reciprocably disposed in a corresponding one of the chambers, wherein displacement of the first magnetic device in a first direction permits flow of fluid through the flow passage and displacement of the first magnetic device in a second direction opposite the first direction prevents flow of fluid through the flow passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A safety valve for use in a subterranean well, the safety valve comprising:
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a housing surrounding a longitudinal flow passage; multiple first magnetic devices; a second magnetic device magnetically coupled to the first magnetic devices; wherein the first magnetic devices are circumferentially spaced apart in a space between an outer perimeter of the flow passage and an exterior of the housing, thereby encircling the second magnetic device; and wherein displacement of the first magnetic devices in a first direction permits flow of fluid through the flow passage and displacement of the first magnetic devices in a second direction opposite the first direction prevents flow of fluid through the flow passage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A safety valve for use in a subterranean well, the safety valve comprising:
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a housing surrounding a longitudinal flow passage; and multiple circumferentially spaced apart stacks of first magnetic devices, each of the stacks of first magnetic devices being reciprocably disposed in a space between an outer perimeter of the flow passage and an exterior of the housing, wherein displacement of the first magnetic devices in a first direction permits flow of fluid through the flow passage and displacement of the first magnetic devices in a second direction opposite the first direction prevents flow of fluid through the flow passage. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A safety valve for use in a subterranean well, the safety valve comprising:
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multiple first magnetic devices; a second magnetic device magnetically coupled to the first magnetic devices; wherein the first magnetic devices are spaced apart along a circumference of a pressure bearing wall of a housing and encircle the second magnetic device; wherein each of the first magnetic devices is completely surrounded by the housing wall; and wherein the second magnetic device is attached to an operating member of the safety valve.
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27. A safety valve for use in a subterranean well, the safety valve comprising:
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multiple first magnetic devices; a second magnetic device magnetically coupled to the first magnetic devices; wherein the first magnetic devices are spaced apart along a circumference of a pressure bearing wall of a housing and encircle the second magnetic device; wherein each of the first magnetic devices is completely surrounded by the housing wall; and wherein an actuator of the safety valve simultaneously displaces the first magnetic devices.
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Specification