“I didn’t have a lot of set ideas about how things should work in the energy industry,” Jahnke said. “So I thought ‘Why can’t we try a curved blade?’ like the curved hook on a Swiss Army Knife can opener.”
Since January, T-3 has been testing Jahnke’s design, slicing through just about every size of drill pipe and casing used in the Gulf.
National Oilwell Varco is showing customers its new shear rams — a pair of trident-like blades that puncture a drill pipe before cutting it to shreds. The ShearMax Low Force Casing Shear Rams are aimed at cutting through tool joints – the thickest section of a drill pipe where it screws into another section of pipe.
GE Oil & Gas’ Hydril line of blowout preventers include a hardware and software system that allows an operator to know exactly how far shear rams close within the blowout preventer.
Another new Hydril product captures the natural pressure thousands of feet underwater to help activate a shear ram.
Weatherford International has touted its new “closed-loop” drilling system, which allows for better monitoring for gas as mud comes back from a well during drilling.
Bud's Offshore Energy (BOE) 
The “Swiss knife” idea reminds me of the simple cigar cutter which cut and adjust to any size and center itself to the cigar OD.The “sharp pointed edge blade” is found on concentric boiled egg cutter in most supermarket. Great ideas but need something more clever than that.