Norbar Torque Tools has designed a special kind of torque multiplier which can be served as subsea equipment. Norbar has designed the machine’s gear in the form of an adapter. The setup consists of chokes, gauges and control valves, and it is going to be used for controlling oil, as well as gas flow.
Norbar's torque multiplier can be used for handling Class 7 as well as Class 4 applications. The user can also configure the device as the device is changeable to the two different types of length categories. The multiplier not only ensures accuracy but also increases the flexibility of the different work operations.
The torque multiplier can be used for controlling oil and gas flow. The device can be installed on ocean floor and in fact, the machine goes 3,000 meters deep down into the sea.
The tool consists of several valves. There are valves of different sizes and they have been designed in such a way that they live up to the torque specifications. It is worth noting in this context that most of the subsea devices use valves of the Class 1 order. The valve of the Class 1 order can bear torque up to 68 NM but the valve of the Class 7 order can withstand 34, 000 NM of torque.
The next issue that arises relates to using the valve. How are the valves going to be used? It would not be a sensible decision to hold different instruments nor would it be a sensible decision to standardize the biggest equipment so that it can be accommodated on the valve designed as per the Class 7 specifications.
The tools that can be accommodated on the Class 4 valve could not be accommodated on the other valve. But the designing parameters of Norbar have been so accurate that both the valves could be used interchangeably and both were found effective in generating torque. The torque output of Class 7 valve could be generated with the help of the Class 4 valve.
“One of our customers, who is Norwegian, approached us so that we can improve the current designs”, said Tim Bloor of the technical team.
Tim Bloor further said: “We addressed the issue, but found that the basic parameters have to be addressed.”
“Ultimately we managed to find the best solutions, in the form of prototype units. These units were far more effective than the currently installed gear adapters.”
The gear operates and serves as the multiplier of torque, but in order to figure out the exact measurement, it has to follow the exact ratio. Besides following the correct ratio, it has to follow the exact speed that is used for maneuvering tools of the class 4 types.
Most importantly, the device has to acclimatize itself to the subsea ambiance. It should be designed in such a way that it can withstand extreme temperatures and pressure. All these factors were kept in mind while making the equipment. It was made in such a way that it can easily withstand corrosion.
Thirdly, it should be convenient to use and apply.
The organization was able to fulfill the above mentioned specifications.
The multiplication ratio of torque should be similar to the turns that the device would take to complete one revolution, and if the ratio is not similar, it would mean that the device is ineffective. The designers were particular about attaining the exact figure in the velocity ratio. They also laid equal emphasis on the weight restriction, while designing the multiplier.
As said previously, the multiplier can be configured into two different length categories, but the design of the multiplier is such that the length can be conveniently adjusted. The tool made not only has a versatile design but is also easy to handle and maneuver. The product is being tested by the customer service department of Norbar. After testing, it will be released for the subsea market.