API TR 16TR1-2018 pdf download.BOP Shear Ram Performance Test Protocol.
2 Normative References The following referenced documents are essential when considering the examples outlined in this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Spec 1 6A, Specification for Drill-through Equipment, 201 7 API Spec 1 6D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment ASTM A370 1 , Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM E1 65, Standard Practice for Liquid Penetrant Examination for General Industry ASTM E709, Standard Guide for Magnetic Particle Testing ASTM A388, Standard Practice for Ultrasonic Examination of Steel Forgings 3 Definitions and Nomenclature 3.1 Definitions For the purposes of this document, the following definitions shall apply. 3.1.1 blind shear ram Closing and sealing component in a ram blowout preventer that first shears the tubular in the wellbore and then seals off the bore or acts as a blind ram if there is no tubular in the wellbore. 3.1.2 closing ratio Area of the operator piston exposed to the closing operating pressure, divided by the cross-sectional area of the piston shaft exposed to the wellbore pressure. 3.1.3 non-sealing shear ram Closing component in a ram blowout preventer that is capable of shearing or cutting certain tubulars, but does not seal.
4 Test Equipment 4.1 General Information to support the traceability of the test equipment and test specimens is essential and shall be recorded, as noted below, prior to each test. The required documentation of the BOP is described in Section 9 and the example data sheet in Annex A. 4.2 Blowout Preventer (BOP) The following items shall be recorded for the blowout preventer (BOP) being used for the shear tests: — assembly part number, serial number, and revision level; — manufacturer; — description; — size (bore) (in.); — rated working pressure (psi). 4.3 BOP Operator The following items shall be recorded for the BOP operator: — type; — operator part number, serial number, and revision level; — rated hydraulic working pressure (psi); — piston closing (shear) area (in 2 ); — piston closing (seal) area (in 2 ); — piston rod area (in 2 ); — piston opening area (in 2 ). NOTE Depending on the operator design, the shear and seal areas may or may not be equal. 4.4 Shear Ram The following items shall be recorded for the BOP shear rams being used for the shear tests: — manufacturer of shear rams; — manufacturer of shear ram seals, if applicable; — style (blind-shear, casing-shear, brand description of blades, etc.); — part number, revision level, and serial number (upper and lower shear ram set); — shear blade part number, revision level, and serial number, if applicable;
— seal part number with revision level and batch number, if applicable; — photo image recorded of both shear blades. 4.5 Instruments The pressure-measuring devices shall be accurate to at least +/-0.5% of the full range of the sensor. The monitoring system shall be at least as accurate as the measuring device. The update (scan) rate of the monitoring system for the opening and closing chambers shall be equal to, or faster than, 20 Hz. Pressure-measuring devices shall be located on the operator closing (shearing) chamber and opening chamber. The location of the measuring devices shall be at the close and open ports of the BOP. A measuring device to record wellbore pressure shall be located near the BOP, e.g. on the BOP side outlet or on the test stump. Chart recorders are acceptable for measuring wellbore pressure. 5 Test Samples 5.1 Pipe Description The following information shall be recorded for each shear pipe sample: — pipe outside diameter (in.); — pipe weight based on plain end (ppf); — pipe wall thickness (in.); — pipe grade. 5.2 Pipe Properties Mill test reports (MTRs) for the pipe to be tested shall be collected and reviewed to confirm that the material meets the tubular specification prior to testing. The following pipe properties shall be recorded for each shear pipe sample based on actual material testing in accordance with ASTM A370 from each joint of pipe: — chemical composition per the MTR; — hardness (HRC or Brinell, depending on material data); — yield strength (psi, based on 0.2 % yield offset strength); — ultimate tensile strength (psi); — elongation (%); — reduction of area (%); — Charpy V-notch impact testing at 70 °F (ft-lb). These pipe properties shall be obtained from an un-deformed region of the pipe, either before or after the test.