|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/812 ; 251/611 ; 251/342 ; 166/320|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 54 인용 특허 : 4|
A marine riser safety valve is disclosed which, when placed in series with a deep water marine riser string, prevents collapse of riser pipe when inadvertent gas influx replaces the drilling fluid column. A cylindrical body is provided having a depression formed therein with at least one diaphragm port from the central bore of the body through the wall of the depression. A valve port is provided axially from the depression. A cylindrical member including a cylindrical diaphragm and a valve sleeve are joined end-to-end. The cylindrical member is disposed ...
A marine riser fill-up valve adapted for connection in an offshore riser string through the sea comprising, a cylindrical body having a bore therethrough for communication of drilling fluid through said riser string and having an outwardly facing annular depression formed in a first section of said body and at least one valve port formed in a second section of said body, at least one diaphragm port formed in the wall of said body between said bore and said annular depression, and a cylindrical member of series-connected coaxial spools including, a cylind...