1. Hydrate Remediation Skid [Data Sheet]
The Hydrate Remediation (HR) skid is designed to be used in the event of a hydrate plug. The skid is deployable from a MSV of opportunity and is operated solely by a Remotely Operated Vehicle (ROV). The skid has the capability to depressurize the production piping to 100 psig or less at an 8,000 feet water depth. Methanol can be routed through the production piping in either direction, and is derived from the existing subsea production distribution system, normally pressurized to 7,500 psi. All operations are carried out using an ROV. ROV-operated ball valves are used to control the HR skid circuit and the vehicle’s hydraulic supply powers the skid intensifier pumps. Upstream and downstream pressures, as well as the methanol inlet pressure, are displayed on gauges mounted in the HR skid panel.

2. Auxiliary HPU Skid [Data Sheet]
The Auxiliary Hydraulic Power Unit (AHPU) skid is designed for complete fluid intervention between the Remotely Operated Vehicle (ROV) system and subsea equipment via multiple client specified hot stabs. The neutrally buoyant skid will be mounted under the host ROV, from which hydraulic and electrical power will be supplied.

3. Fluid Injection Skid [Data Sheet]
The Fluid Injection Skid is ROV-mountable. It is designed to carry and supply various types of injected fluids. The skid is equipped with two or four sixteen-gallon fluid reservoirs and a hydraulic pumping system that can pump the fluid at low or high pressure.

The reservoir fluid contained in the injection skid is isolated from the ROV’s hydraulic system. Fluid may either be pumped from or returned to the fluid reservoirs. The maximum pressure of the returning fluid is 150 psi.

Fluids used with the Injection Skid may be any type of petroleum-based or water-glycol-based hydraulic fluid.

4. Methanol Injection Skid [Data Sheet]
The Methanol Injection Skid is mounted beneath the ROV and supplies 32 or 64 gallons of fluid for methanol injection. The skid consists of an aluminum frame, two or four fluid reservoirs, and a hydraulic pump for discharging the methanol fluid.

The methanol is contained in two or four sixteen-gallon fluid reservoirs, which are compensated to external pressure. The reservoir fluid contained in the injection skid is isolated from the ROV’s hydraulic system.

Since methanol is not injected at high pressures, the skid uses a low-pressure pump instead of a high-pressure intensifier. The seals used in the reservoirs and pumping systems are also compatible with methanol service.