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Automated RGH Operational Sequence

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Automated RGH Operational Sequence . Potential Gas in riser, Driller actuates MPO RGH system RGH automated sequence is initiated by Driller (pre or post well control operations depending upon TOI and Chevron policy);

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Automated RGH Operational Sequence

  • Potential Gas in riser, Driller actuates MPO RGH system
  • RGH automated sequence is initiated by Driller (pre or post well control operations depending upon TOI and Chevron policy);
  • SCADA system automatically interrogates line up to ensure all required RGH flow spool and surface Buffer and RGH Manifold valves are correctly lined up to UMGS
  • Flow spool dual flow outlet valves open to dual return flow hoses and Buffer Manifold
  • PCVs on RGH Manifold full open
  • Upon confirmation the system is lined up correctly, the QCA closes in <3secs
  • Driller maintains circulation using riser booster pump injecting into LMRP, above closed SS BOP
  • RGH PCVs start to close/control to maintain 300psi ASBP on RGH Manifold while riser booster pump pressure stabilises.
  • Once riser booster pump pressure is stable, the RGH SCADA system starts to control the PCVs to maintain constant riser booster pump pressure
  • Gas is circulated out of the riser to the UMGS with the RGH system maintaining constant riser booster pump pressure
  • Riser is circulated to clear any gas
  • Riser secure
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