BOP Shear Ram Test on Test Stump...Confidence or Compliance? The (BSR) is the last mechanical barrier in a worst-case well control scenario. What Happens During a Shear Test? The BSR is closed against pipe sample (worst-case scenario). Closing pressure is recorded. Successful shear and full sealing are verified. Any ram used to shear pipe shall be inspected and redressed or replaced before being considered a verified barrier. The Real Question Can a drilling contractor refuse a shear test on a t