Project Description
Downhole Shock Tool
The Wenzel Downhole Shock Tool effectively reduces impact loading on the bit to extend bit life and reduce bit trips. By isolating axial bit vibrations from the drill string, the Shock Tool will reduce lateral and torsional drill string vibrations, and related fatigue damage or failure of the rotary connections. The Shock Tool allows optimum bit speed to be used under rough drilling conditions, increasing the rate of penetration.
- Isolates bit induced vibrations from the drill string.
- Fully oil-sealed and lubricated for extended service life.
- Does not use temperature-sensitive elastomers for shock absorption, therefore is suitable for use in temperatures to 250°F (120°C), with optional seals available for temperatures up to 320°F (160°C).
- Reliable Belleville disc springs provide optimum load/deflection characteristics to maintain consistent contact between bit and formation, effectively reducing impact loading to extend bit life.
- Pressure balanced to eliminate the effect of downhole hydrostatic pressure.
- Low friction torsional drive permits free vertical movement.
- Well-stabilized, with internal three-point lateral support to minimize deflection.
- Reduces wear and tear on rig and equipment, and fatigue failures on drill collars and drill pipe.
- Automatically compensates for pump open force.
- For maximum effectiveness, the Shock Tool should be positioned immediately above the bit.
- With a packed bottom hole assembly, the Shock Tool may be located a minimum of two drill collar lengths above the top stabilizer, however bit protection will be reduced due to the greater un-sprung mass below the tool.
- Automatic compensation of pump open effect makes the Shock Tool effective with any combination of bit weight or circulating pressure.
| Nominal OD (inch) |
Length (ft) |
Thru Bore (inch) |
Tensile Yield (lbs) |
Pump Open Area (inch2) |
Torsional Limit (ft-lbs) |
Approx. Weight (lbs) |
|---|---|---|---|---|---|---|
| 3.38 | 7.9 | 1.00 | 102 000 | 5.9 | 8 000 | 225 |
| 3.50 | 7.8 | 1.00 | 239 000 | 5.9 | 10 000 | 230 |
| 4.75 | 10.7 | 1.50 | 561 500 | 11.0 | 20 000 | 540 |
| 6.25 | 11.7 | 2.25 | 926 600 | 19.6 | 37 900 | 1000 |
| 6.50 | 11.6 | 2.25 | 960 000 | 19.6 | 39 500 | 1030 |
| 6.75 | 11.5 | 2.75 | 837 400 | 21.6 | 46 400 | 1100 |
| 8.00 | 11.9 | 2.75 | 1 378 800 | 30.6 | 104 600 | 1690 |
| 9.00 | 12.3 | 3.00 | 1 502 000 | 38.5 | 125 000 | 2220 |
| 9.50 | 12.3 | 3.00 | 1 209 000 | 41.3 | 131 000 | 2500 |
| 10.00 | 12.3 | 3.00 | 1 246 500 | 41.3 | 132 300 | 2680 |
| 11.00 | 12.0 | 3.00 | 1 628 300 | 63.6 | 225 600 | 3240 |
| 12.00 | 12.0 | 3.00 | 1 628 300 | 63.6 | 345 400 | 3900 |
| 14.00 | 14.0 | 3.00 | 2 500 000 | 78.5 | 520 600 | 5600 |
Specifications are based on as new condition and are subject to change without notice.
| Nominal OD (mm) |
Length (m) |
Thru Bore (mm) |
Tensile Yield (daN) |
Pump Open Area (mm2) |
Torsional Limit (Nm) |
Approx. Weight (kg) |
|---|---|---|---|---|---|---|
| 86 | 2.4 | 25 | 45 400 | 3 800 | 10 800 | 100 |
| 89 | 2.4 | 25 | 106 300 | 3 800 | 13 600 | 100 |
| 121 | 3.3 | 38 | 249 800 | 7 000 | 27 100 | 250 |
| 159 | 3.6 | 57 | 412 200 | 12 700 | 51 400 | 450 |
| 165 | 3.5 | 57 | 427 000 | 12 700 | 53 600 | 470 |
| 171 | 3.5 | 70 | 372 500 | 13 900 | 62 900 | 500 |
| 203 | 3.6 | 70 | 613 300 | 19 700 | 141 800 | 770 |
| 229 | 3.7 | 76 | 668 100 | 24 800 | 169 500 | 1010 |
| 241 | 3.7 | 76 | 537 800 | 26 600 | 177 600 | 1140 |
| 254 | 3.7 | 76 | 554 500 | 26 600 | 179 400 | 1220 |
| 279 | 3.7 | 76 | 724 300 | 41 000 | 305 900 | 1470 |
| 305 | 3.7 | 76 | 724 300 | 41 000 | 468 300 | 1770 |
| 356 | 4.3 | 76 | 1 112 000 | 50 600 | 705 800 | 2540 |
Specifications are based on as new condition and are subject to change without notice.
