RIG FLOOR EQUIPMENT

Logan Oil Tools’ power swivel with offshore package designed for workover and fishing operations

The newly engineered PS120 is a hydraulic motor-driven, 120-ton power swivel that provides shock-free torque. It is rated to support tensile pipe loads of 120 tons at zero rpm and 65 tons of dynamic load at 100 rpm. The compact, swivel-head design weighs only 2,000 lbs. and fits into most drilling or workover masts. Maximum torque is rated at 8,100 ft-lbs at 150 rpm maximum. Its maximum circulating pressure is rated at 5,000 psi. The swivel head assembly weighs 2,000 lb.

The design incorporates a reliable, custom drive train with hardened steel gears. For most applications, the swivel eliminates the use of dangerous spinning chains, tongs and kelly spinners. It facilitates drilling with longer drill string lengths before the rig must be shut down to add pipe. Stops and startups are thereby reduced, improving rig efficiency and reducing wear on the mud pumps, drawworks and other rig equipment.

Logan Oil Tools’ 120-ton power swivel equipped with offshore package.

The swivel uses a closed-loop hydraulic system with variable displacement, reversible over-center pumps. The system can be remotely controlled by air, electric, or electric wireless remote controls. The variable-volume pump and hydraulic system allows infinite adjustment of torque and speed, within specified ranges, without shifting gears or stopping and restarting the unit. Speed control is continuously variable over the entire operating range. Pressure-compensating-type torque control overrides the speed control to maintain maximum torque. The power unit’s torque limits can be set, thereby eliminating the potential danger of twist-offs or swollen boxes in the drillstring. An integral rotary swivel bearing, floating washpipe assembly, and gooseneck connection eliminates the need for a separate rotary swivel.

A 2¾-in. bore gooseneck and washpipe assembly allows circulation through the 211/16-in. I.D. stem while rotating or in static mode. An access plug allows wireline to be run through the unit.

The swivel’s features include:

• Smooth, shock-free torque to reduce drillstring damage
• Fits many drilling and workover masts
• Allows use of longer drillstring lengths
• Power unit torque limits can be set
• Separate rotary swivel unnecessary
• Choice of diesel engines
• Increased environmental safety features on skids and trailers
• Easy to service.

Extra-cost options include:

• Air intake emergency shutdown
• Cold weather package
• Lifting frame
• Electric or hydraulic loading winch
• Control can be operated remotely or from the power unit
• Hydraulic motor brakes.

The complete swivel package includes:

• Elevator-type bail
• Unitized washpipe packing box assembly
• Fixed-displacement, piston-type hydraulic motor rated at 5,000 psi
• Torque rein assembly
• Safety cable
• 1 1/4 in. swivel joints.

The components from the complete swivel package are available either trailer-mounted or skid-mounted with powered hose reels to form a rugged unit. A swivel carrying stand is standard.