|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||251/065; 166/0665; 335/306|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 4 인용 특허 : 51|
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 magn...
What is claimed is: 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; andmultiple 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 ...