Solution

The largest pressure vessel rated at 5000psi SWP, weighs in at 138 tons with a 35-ton lid.

The screw jacks were special units based on Power Jacks E-Series 300kN Metric machine screw jack. They were of the inverted type incorporating wear monitoring for the gear sets. A motorised reduction gearbox with bevel gearboxes to direct the drive line provided drive to each of the four screw jacks. The motor unit included an integral brake for secure load holding while parked. For positioning purposes a rotary cam limit switch was connected to the jacking system, providing emergency over-travel limits and normal system stop limits.

Products Used

• Screw Jacks - E-Series Machine Screw
• Bevel Gearbox - Neeter Drive Range-N
• System Components - Reduction Gearbox
• System Components - Electric Motor
• System Components - Drive Shafts
• System Components - Couplings - Steel Geared
• System Components - Plummer Blocks
• System Components - Rotary Cam Limit Switch

Solution

At a depth 3000 metres below sea level, Power Jacks Neeter Drive, bevel gearboxes are in operation on subsea single bolt clamp connectors on subsea retrievable chokes.

For this application a special high torque, subsea variant of the Neeter Drive Range-N Series-39 gearbox was designed. The gearbox features precision spiral bevel gears, reinforced drive shafts and of course special subsea sealing with pressure compensation connections.

Products Used

• Bevel Gearbox - Neeter Drive Range-N

View Subsea Press Release