Shear Ram BOP (Blind/Shear Rams) | Oil and Gas Drilling ...

Definition(s)

Shear Ram BOP (Blind/Shear Rams)

Rams having cutting blades that will shear tubulars that may be in the wellbore. Shearing blind rams additionally close and seal against the pressure below. Casing shear rams are designed specifically to shear casing, and may not seal the well bore.

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Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards

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A blowout preventer ( BOP ) closing element fitted with hardened tool steel blades designed to cut the drillpipe or tubing when the BOP is closed, and then fully close to provide isolation or sealing of the wellbore. A shear ram is normally used as a last resort to regain pressure control of a well that is flowing. 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. The joint of drillpipe or tubing is destroyed in the process, but the rest of the string is unharmed by the operation of shear rams.

1. n. [Well Workover and Intervention, Drilling]

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