Ram blowout preventer (BOP) with hydraulic control is a key part of well-control equipment. It’s used for controlling wellhead pressure during drilling, work over operations and formation testing to prevent well blowout effectively and realize safe construction.

STRUCTURE FEATURE

• Flat and side-door structure provides the convenient operation for changing ram. The side door and shell are connected by tripe hinges, which can provide convenient maintenance.

• The concealed oil way system assures the reliable running. And the seal box of piston rod adopts the injection secondary seal to assure the reliable running.

• The cavity of ram is ellipse or rectangle, which have uniform and proper stress distribution.

• The locking screws of piston in cylinder have two structures: exposed and no-rising. The former keep the screw from polluting, the latter make the operator visually inspect the actual position of the rams.

• With proper pipe ram sealing the annular space between casing and tubular when there is tubular in the well bore.

• With blind ram sealing the wellhead completely when there is no tubular in the well bore.

• With shear rams shearing the drilling tools to seal the well in some special circs.

• When the well head is closed, using the kill manifold and choke manifold which are connected to the spool and the side-outlet of the shell to perform special operations such as mud circulating, choking and releasing, well killing.

• If necessary, drilling tools can be hung with pipe ram.