초록 ▼

The invention provides a versatile blow-out preventer having a hydraulically activated bladder and a mechanically operated set of rams mounted in a single body, occupying a minimum of vertical space, and being adapted to operate whether or not there is equipment such as pump rods or cables in the we

The invention provides a versatile blow-out preventer having a hydraulically activated bladder and a mechanically operated set of rams mounted in a single body, occupying a minimum of vertical space, and being adapted to operate whether or not there is equipment such as pump rods or cables in the well head.

대표청구항 ▼

[ I claim:] [1.] A blower preventer of the type used in oil production wells comprising:a body, mountable to a well head, and having a central bore;said body having a cylindrical chamber axially concentric with said central bore and a cylindrical bladder mounted therein capable of deformation into s

[ I claim:] [1.] A blower preventer of the type used in oil production wells comprising:a body, mountable to a well head, and having a central bore;said body having a cylindrical chamber axially concentric with said central bore and a cylindrical bladder mounted therein capable of deformation into said central bore;a chamber surrounding said bladder to accommodate hydraulic fluid to activate said bladder;a source of hydraulic pressure communicating to said chamber;control means to activate or deactivate said source of hydraulic pressure;at least one perpendicular cylinder formed in said body adjacent to said central bore;at least one ram mounted in said cylinder and movable between an open position outside of the perimeter of said central bore and a closed position intersecting the central bore;and means to activate said rams.