M40 Short Bit-to-Bend Mud Lubricated Bearing Assembly
M40 Short Bit-to-Bend Mud Lubricated Bearing Assembly
M40 Mud Motor
Designed to Outlive. Destined to Outperform.
For years, the WZL M40 has been the short bit-to-bend, high-torque bearing assembly of choice for drillers who appreciate consistent, reliable performance.
Optimized geometry
- Maximized OD, enhanced mandrel ID
- Straightforward, compact bearing assembly for reliability and easy service
- Increased flow area and capacity
Fatigue resistance
- Double-start threads increase torque capacity
- Round housing threads greatly reduce stress concentration factor
- Tungsten-carbide armoured radial flow bearings (flow restrictors)
- Cold-rolled mandrel threads and shot peened components
Specifications (Imperial)
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| Operating capacity | Static capacity | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BA OD (in) | Power OD (in) | Bit box to adj. bend (in) | Bit box to fixed bend (in) | Hole size (in) | Bit box thread (API) | WOB (lb) | Max bit overpull (lb) | Torque (ft-lb) | Flow rate (gpm) | WOB to re-run (lb) | Bit overpull to re-run (lb) | Body overpull (lb) | Torque (ft-lb) | Adj. make-up torque (ft-lb) |
| 5 ¼ | 5.00 | 50 | 40 / 46* | 6 ⅛ – 7 ⅞ | 3 ½ Reg | 41,000 | 41,000 | 9,000 | 450 | 181,000 | 127,000 | 424,000 | 14,000 | 18,000 |
| 5.25 | 50 | 40 / 46* | 6 ⅛ – 7 ⅞ | 3 ½ Reg | 41,000 | 41,000 | 9,000 | 450 | 181,000 | 127,000 | 424,000 | 14,000 | 18,000 | |
| 5 ½ | 5.50 | 53 | 43 | 6 ¾ – 7 ⅞ | 3 ½ Reg | 48,500 | 48,500 | 11,000 | 550 | 231,000 | 169,000 | 440,000 | 16,000 | 20,000 |
| 5 ¾ | 5.75 | 58 | 47 | 6 ¾ – 7 ⅞ | 3 ½ Reg | 57,500 | 57,500 | 12,000 | 550 | 254,000 | 212,000 | 499,000 | 17,000 | 22,000 |
| 6 ½ | 6.50 | n/a | 51 | 7 ⅞ – 9 ⅞ | 4 ½ Reg | 72,000 | 72,000 | 17,000 | 600 | 358,000 | 222,000 | 524,000 | 27,000 | n/a |
| 6.62 | n/a | 51 | 7 ⅞ – 9 ⅞ | 4 ½ Reg | 72,000 | 72,000 | 17,000 | 600 | 358,000 | 222,000 | 545,000 | 27,000 | n/a | |
| 6.75 | n/a | 51 | 8 ½ – 9 ⅞ | 4 ½ Reg | 72,000 | 72,000 | 17,000 | 600 | 358,000 | 222,000 | 539,000 | 27,000 | n/a | |
| 7 ¼ | 6.75 | 57 | 45 | 8 ½ – 9 ⅞ | 4 ½ Reg | 76,500 | 76,500 | 21,000 | 850 | 355,000 | 319,000 | 539,000 | 34,000 | 35,000 |
| 7.00 | 57 | 45 | 8 ½ – 9 ⅞ | 4 ½ Reg | 76,500 | 76,500 | 21,000 | 850 | 355,000 | 319,000 | 659,000 | 34,000 | 35,000 | |
| 7.25 | 57 | 45 | 8 ½ – 9 ⅞ | 4 ½ Reg | 76,500 | 76,500 | 21,000 | 850 | 355,000 | 319,000 | 659,000 | 34,000 | 35,000 | |
| 8 ¼ | 8.00 | 66 | 52 | 9 ⅞ – 12 ¼ | 6 ⅝ Reg | 97,250 | 97,250 | 28,000 | 1,200 | 463,000 | 326,000 | 783,000 | 45,000 | 45,000 |
| 8.25 | 66 | 52 | 9 ⅞ – 12 ¼ | 6 ⅝ Reg | 97,250 | 97,250 | 28,000 | 1,200 | 463,000 | 326,000 | 783,000 | 45,000 | 45,000 | |
| 9 ⅝ | 9.62 | 94 | 78 | 12 ¼ – 17 ½ | 6 ⅝ Reg | 132,000 | 132,000 | 41,500 | 1,500 | 772,000 | 223,000 | 1,177,000 | 66,000 | 60,000 |
| 11 ¼ | 11.25 | 106 | n/a | 14 ¾ – 26 | 7 ⅝ Reg | 140,000 | 140,000 | 41,500 | 1,800 | 834,000 | 223,500 | 1,364,000 | 66,000 | 80,000 |
*Applicable to S30 fixed bend only.
Specifications are based on as-new condition and are subject to change without notice. Other sizes available upon request. Motor assemblies are available in a multitude of speeds and configurations.
Specifications (Metric)
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| Operating capacity | Static capacity | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BA OD (mm) | Power OD (mm) | Bit box to adj. bend (m) | Bit box to fixed bend (m) | Hole size (mm) | Bit box thread (API) | WOB (daN) | Max bit overpull (daN) | Torque (N·m) | Flow rate (lpm) | WOB to re-run (daN) | Bit overpull to re-run (daN) | Body overpull (daN) | Torque (N·m) | Adj. make-up torque (N·m) |
| 133 | 127 | 1.27 | 1.02 / 1.17* | 155 – 200 | 3 ½ Reg | 18,200 | 18,200 | 12,200 | 1,700 | 80,500 | 56,600 | 189,000 | 19,000 | 24,400 |
| 133 | 1.27 | 1.02 / 1.17* | 155 – 200 | 3 ½ Reg | 18,200 | 18,200 | 12,200 | 1,700 | 80,500 | 56,600 | 189,000 | 19,000 | 24,400 | |
| 140 | 140 | 1.35 | 1.09 | 171 – 200 | 3 ½ Reg | 21,600 | 21,600 | 14,900 | 2,100 | 102,700 | 75,200 | 196,000 | 21,700 | 27,100 |
| 146 | 146 | 1.46 | 1.19 | 171 – 200 | 3 ½ Reg | 25,600 | 25,600 | 16,300 | 2,100 | 113,000 | 94,300 | 222,000 | 23,100 | 29,800 |
| 165 | 165 | n/a | 1.30 | 200 – 251 | 4 ½ Reg | 32,000 | 32,000 | 23,100 | 2,300 | 159,200 | 98,700 | 233,000 | 36,600 | n/a |
| 168 | n/a | 1.30 | 200 – 251 | 4 ½ Reg | 32,000 | 32,000 | 23,100 | 2,300 | 159,200 | 98,700 | 233,000 | 36,600 | n/a | |
| 171 | n/a | 1.30 | 216 – 251 | 4 ½ Reg | 32,000 | 32,000 | 23,100 | 2,300 | 159,200 | 98,700 | 240,000 | 36,600 | n/a | |
| 184 | 171 | 1.45 | 1.14 | 216 – 251 | 4 ½ Reg | 34,000 | 34,000 | 28,500 | 3,200 | 157,900 | 141,900 | 240,000 | 46,100 | 47,500 |
| 178 | 1.45 | 1.14 | 216 – 251 | 4 ½ Reg | 34,000 | 34,000 | 28,500 | 3,200 | 157,900 | 141,900 | 293,000 | 46,100 | 47,500 | |
| 184 | 1.45 | 1.14 | 216 – 251 | 4 ½ Reg | 34,000 | 34,000 | 28,500 | 3,200 | 157,900 | 141,900 | 293,000 | 46,100 | 47,500 | |
| 209 | 203 | 1.68 | 1.32 | 251 – 311 | 6 ⅝ Reg | 43,300 | 43,300 | 38,000 | 4,900 | 205,900 | 145,000 | 348,000 | 61,000 | 61,000 |
| 209 | 1.68 | 1.32 | 251 – 311 | 6 ⅝ Reg | 43,300 | 43,300 | 38,000 | 4,900 | 205,900 | 145,000 | 348,000 | 61,000 | 61,000 | |
| 244 | 244 | 2.39 | 1.98 | 311 – 445 | 6 ⅝ Reg | 58,700 | 58,700 | 56,300 | 5,700 | 343,400 | 99,200 | 524,000 | 89,500 | 81,400 |
| 286 | 286 | 2.69 | n/a | 375 – 660 | 7 ⅝ Reg | 62,300 | 62,300 | 56,300 | 6,800 | 371,000 | 99,400 | 607,000 | 89,500 | 108,500 |
*Applicable to S30 fixed bend only.
Specifications are based on as-new condition and are subject to change without notice. Other sizes available upon request. Motor assemblies are available in a multitude of speeds and configurations.
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