Blind Shear Rams

Information that shows the blind shear rams installed in the bop stack both surface and subsea stacks are capable of shearing the drill pipe in the hole under maximum anticipated surface pressures therefore an operator is responsible to assure the bop shear rams will reliably shear the drill pipe in the particular operational conditions. Pipe rams close around a drill pipe restricting flow in the annulus ring shaped space between concentric objects between the outside of the drill pipe and the wellbore but do not obstruct flow within the drill pipe. Api standard 16ar standard for repair and remanufacture of drill through equipment first edition april 2017.

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Click here to download our shearing blind ram specification chart.

Blind shear rams. Once the pipe is cut or sheared by the shear rams it is usually left hanging in the bop stack and kill operations become more difficult. Variable bore rams inc. Pipe blind shear and blind shear. Enhanced reliability for drilling and production operations keywords.

A shear ram is normally used as a last resort to regain pressure control of a well that is flowing. Carries bore ram sizes from 7 1 16 inches to 21 1 4 inches for lws lxt nxt sl and slx ram bops. During drilling operation only the driller knows whether there is drill string in the borehole. Shearing blind rams blind shear rams are designed to completely seal off a well after the pipe is cut or sheared controlling pressure.

The blind ram bop should be equipped with the safety cover that does not hold back remote control. Blind shear ram closing and sealing component in a ram bop that first shears the tubular in the wellbore and then seals the bore or acts as a blind ram if there is no tubular in the wellbore. Sbr shearing blind ram blind shear ram single piece shear ram subsea drilling subsea production created date. Rams or ram blocks are of four common types.

A thick heavy steel component of a conventional ram blowout preventer in a normal pipe ram the two blocks of steel that meet in the center of the wellbore to seal the well have a hole one half of the hole on each piece through which the pipe fits the blind ram has no space for pipe and is instead blanked off in order to be able to close over a well that does not contain a drillstring. Either close the pipe ram bop or the blind ram bop. Shearing blind rams sbrs author.

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