Subsea pod pump

Abstract

A subsea oil and gas production Christmas tree control system, serviceable by an ROV subsea, comprises an umbilical and a system controller further comprising an HPU that comprises a manipulatable subsea housing; a subsea hydraulic fluid reservoir; a motor disposed in the housing; and a hydraulic power unit disposed in the housing. Hydrocarbon production may controlled subsea by deploying a modular subsea oil and gas production Christmas tree control system using an ROV; supplying the HPU with hydraulic fluid; providing a predetermined control to a subsea Christmas tree using a Christmas tree control system component; monitoring a Christmas tree control system status; enabling a redundant Christmas tree control system component upon detection of a fault in a Christmas tree control system component paired with the redundant component; and providing status data from the Christmas tree control system to a status data receiver using a data communications link.

1 . A hydraulic power unit (HPU) for use subsea, comprising:
 a. a remotely operated vehicle (ROV) manipulatable housing deployable subsea;   b. a subsea reservoir of hydraulic fluid;   c. a motor disposed in the housing; and   d. a hydraulic power unit disposed in the housing, the power unit slaved to the motor and in a closed loop fluid communication with the reservoir.   
     
     
         2 . A subsea oil and gas production Christmas tree control system, serviceable by a remotely operated vehicle (ROV) subsea, comprising:
 a. an umbilical, further comprising at least one of (i) a predetermined number of chemical lines, (ii) a predetermined number of hydraulic lines, (iii) a predetermined number of electrical power lines, or (iv) a predetermined number of data communication lines; and   b. a system controller, further comprising a hydraulic power unit (HPU) module;   c. a subsea hydraulic supply reservoir module in closed loop hydraulic system communication with the HPU; and   d. a subsea umbilical termination module in fluid communication with the umbilical and the system controller, the subsea umbilical termination module further comprising at least one Christmas tree control line.   
     
     
         3 . A method of providing susbea control of hydrocarbon production devices, comprising:
 a. deploying a modular subsea oil and gas production Christmas tree control system subsea using remotely operated vehicle (ROV), the Christmas tree control system comprising a hydraulic power unit (HPU) and an umbilical;   b. using a closed loop hydraulic system to supply the HPU with hydraulic fluid;   c. using a component of the Christmas tree control system to provide a predetermined control to a Christmas tree located subsea;   d. monitoring a predetermined status of the Christmas tree control system;   e. enabling a redundant component of the Christmas tree control system upon detection of a fault in a component of the Christmas tree control system paired with the redundant component; and   f. providing status data from the Christmas tree control system to a predetermined receiver of status data using a data communications link.