A system for installing a band around a rigid subsea structure includes a remotely operated vehicle (ROV) having a main body. A set of jaws extendable beyond an outer perimeter of the main body are coupled to the ROV. The system also includes a band distribution system operatively and a band installation mechanism operatively coupled to the ROV.

A system for installing a band around a rigid subsea structure includes a remotely operated vehicle (ROV) having a main body. A set of jaws extendable beyond an outer perimeter of the main body are coupled to the ROV. The system also includes a band distribution system operatively and a band installation mechanism operatively coupled to the ROV.

Systems and methods are provided to assist with landing a component, e.g. a blowout preventer or production tree, having a female connector onto a male component which may be a mandrel extending from a top portion of the production tree or a wellhead, respectively. Thrusters are located between the component and the mandrel or wellhead, respectively, extending radially and connected to the bottom portion of the component. Activation of a thruster will cause the component to move in a direction away from the activated thruster. Real-time data is collected related to the position of the component relative to the mandrel or wellhead, respectively, and is used to determine which the thrusters to activate. The component is thus caused to move in a desired direction, until the female connector can be lowered onto the male component thereby engaging the blowout preventer or production tree with the mandrel or the wellhead, respectively.

A subsea chemical injection system and method for injecting chemicals into a hydrocarbon production assembly adjacent the seabed wherein a seawater volume flowmeter is utilized to measure seawater pumped through the system and a chemical subsea mass flowmeter is used to measure a chemical injected into the seawater, where the chemical subsea mass flowmeter measures the chemical at a pressure less than the seawater pumped through the system. Based on the chemical subsea mass flowmeter measurement, the flowrate of a chemical injected into the seawater can be adjusted to a predetermined setpoint corresponding to the flowrate of seawater pumped through the system. The chemical subsea mass flowmeter includes a Coriolis tube and chemical injection process pump housed within a pressure vessel. The subsea chemical injection system may be carried on a skid.

A subsea chemical injection system and method for injecting chemicals into a hydrocarbon production assembly adjacent the seabed wherein a seawater volume flowmeter is utilized to measure seawater pumped through the system and a chemical subsea mass flowmeter is used to measure a chemical injected into the seawater, where the chemical subsea mass flowmeter measures the chemical at a pressure less than the seawater pumped through the system. Based on the chemical subsea mass flowmeter measurement, the flowrate of a chemical injected into the seawater can be adjusted to a predetermined setpoint corresponding to the flowrate of seawater pumped through the system. The chemical subsea mass flowmeter includes a Coriolis tube and chemical injection process pump housed within a pressure vessel. The subsea chemical injection system may be carried on a skid.

A subsea fluid distributor comprises a support framework configured to be removably mounted to and hydraulically connected to a subsea structure intermediate the subsea structure and an incoming flying lead terminator of an incoming flying lead; a plate attached to an upper section of the support framework; a fixed bucket attached to the support framework; a valve attached to the support framework; a lower framework attached to a lower portion of the support framework; a first hydraulic tube attached to the lower framework and in fluid communication with the valve; a flying lead junction plate support framework attached to the lower portion of the support framework; a second hydraulic tube disposed at least partially within flying lead junction plate support framework and in fluid communication with various subsea equipment; a first remotely operated vehicle (ROV) torque bucket (62) attached to an upper portion of the flying lead junction plate support framework; a second ROV torque bucket (22) attached to the upper of the support framework; and a predetermined set of signal connectors attached to the upper of the support framework and operatively connected to the valve to aid in controlling the operation of the valve.

An underwater robotic system includes a frame adapted to be deployed in a body of water and having guide rails and at least one movable rail movably coupled to the guide rails. An actuator module is movably coupled to the at least one movable rail. A control panel disposed proximate the frame and has a plurality of controls thereon. The plurality of controls is operable by an actuator on the actuator module. A position of each of the plurality of controls is known such that motion of the actuator module and the at least one movable rail is remotely controllable to actuate any chosen one of the plurality of controls.

An underwater robotic system includes a frame adapted to be deployed in a body of water and having guide rails and at least one movable rail movably coupled to the guide rails. An actuator module is movably coupled to the at least one movable rail. A control panel disposed proximate the frame and has a plurality of controls thereon. The plurality of controls is operable by an actuator on the actuator module. A position of each of the plurality of controls is known such that motion of the actuator module and the at least one movable rail is remotely controllable to actuate any chosen one of the plurality of controls.

A tool for mechanically unlocking a subsea hydraulic connector which is configured to releasably connect a first subsea component to a second subsea component. The connector includes a housing which is secured to the first subsea component, a locking piston which is positioned within the housing, and a number of locking jaws which are configured to be engaged by the locking piston. The locking piston is movable between a locked position in which the locking piston forces the locking jaws into engagement with the second subsea component to thereby secure the connector to the second subsea component, and an unlocked position in which the locking piston releases the locking jaws from engagement with the second subsea component to thereby disconnect the connector from the second subsea component. The tool includes a number of transportable actuators which are positionable into an operable position adjacent the connector, and activation of the actuators causes the locking piston to move from its locked position to its unlocked position to thereby disconnect the connector from the second subsea component.

A lower stack assembly of a blowout preventer for a hydrocarbon extraction well includes a safety function that can be hydraulically activated to rapidly cut off a pipeline section. The assembly includes a first valve and a first fluidic connection connecting the first valve and the least one safety function, so that the first valve selectively cuts off a flow of fluid directed towards the safety function. The assembly further includes a port operatively connected to the first valve, cooperating with a remotely operated vehicle to transmit a pilot signal to the first valve, an accumulator housing pressurized fluid, and a second fluidic connection. By cooperating with the first valve, the accumulator supplies pressurized fluid to the safety function to activate it. The second fluidic connection connects the accumulator and the first valve, so that the second fluidic connection remains operative during the entire working life of the assembly.