| Model | Hoist | Pulldown | Torque | Stroke | Weight | |||||
| 306130 |
200,000 lbs |
200,000 lbs (90,718 kg) |
20,000 ft.lbs (2,765 kg.m) |
2.50 in (63.5 mm) |
195 lbs (89 kg) |
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| 306430 | 200,000 lbs (90,718 kg) |
200,000 lbs (90,718 kg) |
30,000 ft.lbs (4,147 kg.m) |
2.50 in (63.5 mm) |
1,050 lbs (476 kg) |
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| PD6-2 | 125,000 lbs (56,700 kg) |
125,000 lbs (56,700 kg) |
12,000 ft.lbs (1,659 kg.m) |
0.75 - 1.75 in (19 - 45 mm) |
165 lbs (75 kg) |
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The floating cushion sub performs two important functions; it provides a means of making up and breaking out threaded connections on casing and drill pipe and it also prolongs bearing and gear life in the top drive rotary box.
By incorporating a certain amount of axial move- ment below the drill's rotary drive spindle, the sliding spindle of the cushion sub will allow the threads of the mating drill string components to float together or apart during rotation without any axial movement of the rotary head.
The allowable movement of the sliding spindle decreases the impact on the rotary drive when the two mating threads are stabbed together and it also decreases the load on the flanks of the threads of the mating components.
The Model 306130 is utilized in both slant hole and vertical drilling operations where the rig is equipped with a top drive rotary gear box.
Features• Splined drive assembly |
Ordering Information• Drill make and model• Thread type and size • Spindle and pipe diameter • Breakout flat details |
Benefits• Direct torque transfer• Reduction in thread damage • Shock and vibration is minimized • Component life is extended • Minimum maintenance requirements |
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| Foremost Industries Inc. designs, manufactures and markets all-terrain wheeled and tracked vehicles, drilling rigs, mining tooling and reverse circulation systems for the construction, geophysical, mineral exploration and waterwell industries. | ||||