ROV Torque Tooling 1

[murr52]

I am designing a torque limiter for subsea equipment so the ROV's don't inadvertantly overtorque a valve. I can't seem to find how accurately the Class 4 torques tools can be controlled. Most of the companies who manufacture them don't show how precisely the actual output torque can be regulated.

Any one know if its typical for a ROV operator to accidentally or unknowingly spike the torque tool over 100 ft-lbf or 50 ft-lbf?
if his target was 200 ft-lbf or 1200 ft-lbf

 

[ab1999]

Typically no, I have not seen the type of "spike" in torque values as you are suggesting. As the torque tool is typically driven by hydraulic pressure & flow from the ROV, limiting the pressure via some type of relief valve would seem a suitable solution to prevent excessive torque. This would likely be an issue on newer systems with adjustable pressure settings from surface.

 

[Apecape]

Over torque makes clients unhappy and hell for Sub~engineers to callibrate tools. Setup with real time torq feedback for accurate control is the only way to go. Even have to be aware for spikes with equipment that allows surface control for flow, presure and max torq limit in software.

 

[Apecape]

Place your ROV questions on rovworld.com for a serious reply from the pro´s.

regards,