다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.NTIS 바로가기
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.DataON 바로가기
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.Edison 바로가기
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.Kafe 바로가기
|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||166/321 ; 166/374|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 36 인용 특허 : 1|
A valve for use in controlling flow in a subterranean well and using an expandable and contractable fluid sealing bellows is disclosed. The valve has a valve closure member such as a ball valve head acutated by an increase in control fluid pressure. Control pressure causes the bellows to expand or contract and a control rod engaging the bellows can be shifted. The control rod is part of an actuating mechanism for shifting the valve closure member between open and closed positions. The bellows can support the difference between control pressure and well p...
A valve for use in controlling the flow through a fluid transmission conduit in a subterranean oil or gas well in response to changes in a control pressure, comprising: a valve housing having a bore communicating with the fluid transmission conduit; a shiftable valve closure member for opening and closing the valve bore; actuating means for shifting the valve closure member between open and closed positions in response to differential changes in a supplied control fluid pressure and the well fluid pressure below said valve closure member comprising an ex...