Page 549 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

546 CHAPTER 20 Tooling and Sensor Deployment
FIGURE 20.13
Gasket ring tool.
(Courtesy Forum Energy Technologies.) expand the tool to the inner wall of the gasket. In the event of hydraulic failure after engagement,
springs and small adjustable tabs located on the bottom of the tool secure the gasket. • Grinder
There are a host of hydraulic power tools manufactured by traditional tooling manufacturers and marketed to the subsea industry. As an example, Stanley Hydraulic Tools manufactures a full line of tools intended for subsea use and are operated by commercial divers, underwater power units, and ROVs.
Hydraulic tools, by their very nature, operate using a closed system of hydraulic fluid. This means that they have very little susceptibility to the environment including operation fully sub- merged in fluids with high contamination and extreme temperatures.
Stanley’s hydraulic tool design approach is to internalize its working components (such as hydraulic motors and valves), which optimizes geometry, features, and packaging to create a com- pact solution.
Material selection for standard subsea tools is made with the corrosive environment in mind. Typical iron and steel parts have been traded out for stainless steel and may utilize chrome plating as appropriate. This includes critical components like valves and spools, which maintains product life, but also applies to less critical components, such as fasteners, allowing maintenance or service of the product after heavy use.
This manipulator-compatible portable grinder (Figure 20.14) is primarily used for top, face, and side grinding and cutting operations; it can also be fitted with rotary wire brushes and a variety of abrasive and polishing disks.