Offshore oil and gas seawater lift submersible pumps automated underwater cleaning system

A method for automatically spraying a cleaning fluid from a tank onto a suction strainer of a submersible pump and a caisson grill of a caisson of an offshore oil and gas facility, the suction strainer having a cylindrical surface with a cylinder axis parallel to the caisson, and the caisson grill having a downwardly facing planar surface, the method comprising:

• obtaining, from a programmable logic controller, a first command to spray the cleaning fluid initiated by a preselected first pressure differential transmitter value;
• obtaining, from the programmable logic controller, a second command to spray the cleaning fluid initiated by a preselected second pressure differential transmitter value;
• drawing the cleaning fluid, using an apparatus for spraying the cleaning fluid, from the tank in fluid connection with a pump by turning on the pump of the apparatus to pressurize the cleaning fluid, forming a pressurized cleaning fluid;
• spraying the pressurized cleaning fluid onto the cylindrical surface of the suction strainer;
• and
• spraying the pressurized cleaning fluid onto the downwardly facing planar surface of the caisson grill.

A system for automatically spraying a cleaning fluid from a tank onto a suction strainer of a submersible pump and a caisson grill of a caisson of an offshore oil and gas facility, the suction strainer having a cylindrical surface with a cylinder axis parallel to the caisson, and the caisson grill having a downwardly facing planar surface, the system comprising:

• a pump comprising a pump outlet configured to receive the cleaning fluid from the tank into a pump inlet and to pressurize the cleaning fluid to a pressurized cleaning fluid at a preselected pressure;
• a first nozzle ring comprising a first spray nozzle ring inlet and a first spray nozzle ring outlet configured to direct the cleaning fluid at the cylindrical surface of the suction strainer;
• a second nozzle ring comprising a second spray nozzle ring inlet and a second spray nozzle ring outlet configured to direct the cleaning fluid at the downwardly facing planar surface of the caisson grill;
• and
• a control system comprising:
• a human machine interface configured for user inputs;
• and
• a programmable logic controller.