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Unformatted text preview: Horizon prior to the performance of the critical negative tests. 2. Positive Pressure Test Conducted on April 20 Another method of testing well integrity is a positive pressure test, which is a test that is conducted by pumping additional fluid into the well after sealing the blind shear rams. The rig crew then monitors the well to determine whether the pressures in the well remain static. As described previously, the Deepwater Horizon crew performed a 2,500 psi positive pressure test between 10:30 a.m. and BP‐HZN‐BLY00124455. BP‐HZN‐MBI00021336. 220 BP‐HZN‐MBI00021424. 221 BP‐HZN‐MBI000021237. 222 BP‐HZN‐MBI00329028. 218 219 91 noon on April 20. The pressures in the well remained constant during testing. 223 Dr. Smith, an expert retained by the JIT to review test data and other information, found the positive pressure test to be acceptable. 224 3. Negative Tests Conducted on April 20 Without much time to consider changes in the temporary abandonment procedures, on April 20 the...
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