Hydraulic Systems News

Martin McDonald, Senior Vice President, ROV Division, Oceaneering International.
Courtesy of Oceaneering International

One-on-One with Martin McDonald, SVP, ROV Division, Oceaneering

, more cost effective.What evolution or improvement to ROVs – the vehicle, control elements, or accessories – would you most like to see?It’s a balance between hydraulic and electric propulsion systems. We will see electric manipulators coming into play, reducing the reliance on hydraulic systems. ROVs today still require some heavy-duty pumping and intervention capabilities, so that’s the challenge between getting the all-electric systems vs. hydraulic systems. Today, for example, electric manipulators offer less than 50% of the lift capability and efficiency of a hydraulic manipulato

(Photo: ROVOP)

ROVOP Acquires M2 Subsea's ROV Fleet

underwater vehicles (ROVs) operator ROVOP announced it has purchase of the entire fleet of 28 ROV systems from competitor M2 Subsea.Following a technical review, 19 of the systems meet the ROVOP standard and will be added to its fleet, increasing the firm's ROV fleet to 51, including 34 hydraulic systems and 17 electric systems.The 11 remaining ROVs will either be decommissioned or sold.ROVOP CEO Steven Gray said, “The addition of these ROV systems to the fleet will enable ROVOP to better support customers with the appropriate ROVs for their requirements based on capability and greater

The new small self-calibrating class 1-4 torque tool (Photo: Saab Seaeye)

Smart Torque Tool Takes Off

tasks.As a software-managed system, it is possible to achieve far more accurate and finer control and feedback than with a hydraulic system.At half the weight of its hydraulic equivalent, it can be operated from an electric robotic vehicle of a much smaller size than is normally required for hydraulic systems, allowing smaller support vessels to be used

(Image: ABB)

Powering the Seafloor: Put a Socket in It

. “With the spring, it is not easy to just release it a little bit. With an electric failsafe, you can have full control of torque and speed,” says Strand.Current industry requirements, under API 170 (“the Xmas tree bible,” says Lundanes) is very much written for electro-hydraulic systems, however. “There’s a bureaucracy to overcome. But we will overcome it.”The downturn in the oil and gas industry has helped. There’s more open minds and acceptance to new technology,” says Lundanes. “Even if the API is not moving fast, operators’ specificatio

New small self-calibrating class 1-4 torque tool to bring savings to torque tool tasks with the use of smaller electric work vehicles (Photo: Saab Seaeye)

Smart Torque Tool Advances an Electric Future

opening and closing seabed valves and other torque tensioning tasks.   Torque accuracy is vital for operators needing to trust a system not to damage a valve when opening and closing. Saab Seaeye said electric torque systems are far more accurate over the whole torque range when compared to hydraulic systems. Deck calibration is quick, repeatable and simpler.   An electric system can provide highly accurate small torque values so is extremely useful where there is an inherent risk of damage to older valves when turned, as they may be in poor condition.   The electric torque tool with

Image: Webtool

New Tool for Subsea Umbilical & Cable Recovery

Hydraulic systems specialist Webtool has introduced a new gripping and lifting tool for recovering subsea umbilical and cable for offshore oil and gas and decommissioning projects. The Cable Retrieval Tool (CRT200), developed in consultation with international certification body and classification society, DNVGL, allows the safe and controlled recovery of damaged cable and umbilical, up to 8” (203 mm) diameter.    Current methods of recovering umbilicals for repair or replacement involve trenching the seabed around the cable or umbilical to allow a double choke sling to be attached

Image: Seatools

New Subsea Storage Technology Introduced

addition to compensating for hydrostatic pressure, subsea storage is required to accommodate oil volume fluctuations caused by temperature changes, or may, for example, harbor control fluids. The subsea storage of liquids also is of interest to other types of equipment, such as large-volume subsea hydraulic systems with significant differential (oil) volumes caused by a large number of actuators, as with the Pile Installation Frame.   One of the decisive design criteria for a long-term storage reservoir is the reliability of the barrier between fluid and seawater. During the recently completed

Image: Seatools

Seatools Debuts Subsea Compensator Range

introduced its new subsea hydraulic compensator range: the Advanced series.   This new subsea compensator range, based on the preceding Hyco range, delivers improvements in robustness, durability and standardization, according to the manufacturer.   Seatools, a specialist in subsea hydraulic systems, said it performed an extensive development trajectory that led to the Advanced series. The new range, meant for heavy-duty subsea hydraulic systems – such as subsea vehicles (e.g. ROVs and trenchers) and dredging systems (suction tube SHPU compensation) – features a strongly improved

Richard Benzie (Photo: IMCA)

IMCA Revises ROV OPS Guidance

contractors need to recognize and accept the importance of providing sufficient qualified personnel to conduct safe operations at all times. This includes periods of routine preventative maintenance, breakdown or repairs when personnel may be exposed to the dangers of high-voltage, high-pressure hydraulic systems, rotating machinery and other potential hazards.”   With sections on ‘ROV Classification’; ‘ROV Tasks’; ‘ROV Tools’; Environmental Considerations’; ‘ROV Operations’; ‘Equipment, Certification and Maintenance’; &lsquo

Design of Hydraulic Systems for Subsea Applications

involved in this new frontier include mining, oil and gas, infrastructure, energy generation and natural science. These activities all involve complex and highly technical systems. Many of them, particularly those performed beneath the sea’s surface, utilize a broad array of electro-hydraulic systems to carry out their work—lower and lift equipment to the seabed, remote operation of subsea systems, and permanent monitoring of emplaced systems such as petroleum wellheads or communications cabling. It is frequently assumed that such hydraulic equipment needs to be specifically designed

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