Page 58: of Offshore Engineer Magazine (Dec/Jan 2015)

57 59

Products

Solutions pipe, and upon completion, maneuvered to the next objective, a

Saab demos Sabertooth at NASA subsea valve. Approaching the valve, operations modes switch from autonomous to manual and the Sabertooth was ? own to the valve, where it engaged the torque tool, and operated it. The vehicle then disconnected, switched back to autonomous mode and followed pre-programmed instructions to swim across the demonstration area with a structure in its way. While traveling its pre-programmed route without operator input, the Sabertooth detected the imped- ing structure, slowed, determined another route, redirected, and moved past the obstacle to its destination.

The Sabertooth design is available in a single or double hull, both rated for 3000m depth, and is capable of forward speeds of up to 5 knots for the single hull and 4 knots for the double hull. With six degrees of freedom, the vehicle can adjust its heading, depth, pitch,

UK-based Saab Seaeye demonstrated its Sabertooth AUV/R OV roll and altitude, allowing it to adapt to a range of operating condi- at NASA’s Neutral Buoyancy Lab at the Johnson Space Center in tions. Additionally, the Sabertooth is capable of step functions,

Houston in November, where guests watched the a hybrid system which allow adjustments in .1m increments, stabilizing the vehicle, perform in a simulated subsea environment. and allowing it to hover in a stationary position. The hybrid vehicle

During the demo, the Sabertooth left its docking unit and is capable of operating in three modes: autonomous, operator- switched from manual to autonomous mode to inspect a pipe. assisted, and manual operation. –Jerry Lee

While scanning the pipe, the Sabertooth followed the pro? le of the www.seaeye.com seawater-compatible materials, including drilling circulation sub is a remotely 316L stainless steel, high grade Duplex actuated device that facilitates drilling stainless steel or Marine bronze. In addi- and hole cleanup operations. tion, all sensors in the series provide dual The circulation sub uses active RFID independent, 2-wire, 4-20mA outputs, technology to communicate open and with no signal loss over long cable close commands. An RFID tag dropped lengths. Nominal pressures are from 1-400 from the surface circulates through the bar, with operating temperatures are from sub, where a built-in antenna receives -20°C to +60°C in non-freezing media. the tag signal to either close or open the

The SS transmitters are suitable for a valve. A battery-powered electric motor wide range of subsea oil and gas, marine then drives a hydraulic pump that moves and offshore applications, including the valve to the preprogrammed posi-

Impress releases pressure, level and depth measurement tion. The sub can be selectively actuated new transmitter on unmanned surface vehicles (USVs), an unlimited number of times for a high

Impress Sensors and Systems launched remotely operated vehicles (ROVs) and degree of operational ? exibility. And it a new range of subsea pressure and level other subsea hydraulics systems. can be used with up to 16 RFID-actuated www.impress-sensors.co.uk www.impress-sensors.co.uk transmitters, suitable for a variety of www.impress-sensors.co.uk tools in series.

pressures and applications in depths up The sub also provides open com- to 3000m and external pressures up to munication between the drillpipe and 300 bar. annulus to place lost-circulation material

The SS series of subsea pressure and (LCM) pills precisely in critical intervals. level transmitters uses a ceramic pres- For one North Sea well drilled through

Weather Weather sure sensor, which provides corrosion a soft porous limestone formation with unleashesunleashes resistance and can be continuously natural faults and a tendency for seepage,

JetStream RFIDJetStream RFID submersed in seawater. The transmit- the RFID sub was actuated (opened and

Weatherford has developed an alterna- ters are ? tted with a choice of subsea- Weatherford has developed an alterna- closed) a total of eight times to deliver certi? ed connectors and locking sleeves tive circulation sub that provides fullbore LCM pills and keep ? uid losses low, thus to suit speci? c customer requirements. ? ow-through without the need for allowing the well to reach target depth.

The housing is available in a choice of ball-drop actuation. The JetStreamRFID www.weatherford.com

December 2015 | OE oedigital.com 60 060_OE1215_Solutions.indd 60 11/20/15 5:25 PM