Dando Drilling International Ltd

Hollow spindle|Power Swivel|for offshore

Similar to the MK 500, this rotary head model is fitted with a twin worm and single wheel gear totally enclosed in an oil bath case. Again, the head incorporates a 150mm I.D hollow spindle which is mounted on taper roller bearings but the MK 1000 is powered by twin piston motors providing controlled rotation and torque in forward and reverse.

Key Features & Options

Hydraulic piston and gear motor options available
A choice of different ratio’s to suit your drilling requirements
Can be easily mounted on-board drilling vessels and onshore rigs.
Robust twin wormshaft and single gear wheel arrangement.
Simple to maintain
40 Ton loading capacity
Technical support available to advise of the correct hydraulic system suitable for the speed and torque needed.

General Specifications

Estimated Weight: 630kg
Gear Oil: 18 litres  EP Gear Oil Grade 80/90
Hydraulic Oil: Shell Tellus 46 or equivalent
Maximum Pullback: 40 tons.
Estimated Shipping Dimensions: 1m x 1m x .8m

DOWNLOAD BROCHURE

TWIN PISTON MOTOR ARRANGEMENTTWIN GEAR MOTOR ARRANGEMENTPHOTOS All Information

With reference to our 40+ton rigs, Dando Drilling use a valve with a 140 /Lt slice (i.e.70lt motor) and pressure at 315 bar (4568 PSI). Based on this and with a hydraulic piston motor you will see the following speed and torque:

20:1 Ratio
High torque mode
Torque = 15398 Nm (11317 Lb/ft) @ 43 RPM
High speed mode
Torque = 3850 Nm (2830 Lb/ft) @ 175 RPM
12 ½:1 Ratio
High torque mode
Torque = 9624 Nm (7073 Lb/ft) @ 70 RPM
High speed mode
Torque = 2406 Nm (1768 Lb/ft) @ 280 RPM

Please note: These are the results when fitted to a Dando type circuit and not the actual performance that the Rotary head and hydraulic motors are capable of. The piston motor can run with a pressure of 420 bar (6090PSI) and an RPM of 5000, therefore results will vary depending on your hydraulic capability.