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Downhole motor
Downhole motor is a kind of downhole dynamic drilling tool upon the power of drilling mud. Mud stream from the outlet of mud pump flows through a by-pass valve into the motor. This stream produces pressure loss at both inlet and outlet of the pump, to push the rotor into rotating. and to transmit the torque and speed onto the bit. The downhole motor property mainly depends upon its property parameters.
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Downhole motor
Product details
Working principle
Downhole motor is a kind of downhole dynamic drilling tool upon the power of drilling mud. Mud stream from the outlet of mud pump flows through a by-pass valve into the motor. This stream produces pressure loss at both inlet and outlet of the pump, to push the rotor into rotating. and to transmit the torque and speed onto the bit. The downhole motor property mainly depends upon its property parameters.
Composition
The downhole motor consists of four major assemblies: bypass valve, motor, cardan shaft, and drive shaft.
Representative models and parameters of screw drilling tools
| Model | Tool OD mm in |
Bit Size | Connecting Thread | Lobe | Stage | Flow Rate | Rotory Speed | Working Pressure Loss | Working Pressure |
| Up Down | lpm gpm | rpm | Mpa psi | KN lb | |||||
| 5LZ172×7.0 L-5-840 | 172 6 3/4 | 213-251 8 3/8-9 7/8 | 4 1/2 REG 4 1/2 REG | 5:06 | 5 | 947-1894 250-500 | 78-154 | 4-5.65 585-824 | 100-170 22000-37400 |
| 5LZ172×7.0 L-6-840 | 172 6 3/4 | 213-251 8 3/8-9 7/8 | 4 1/2 REG 4 1/2 REG | 5:06 | 6 | 947-1894 250-500 | 78-154 | 4.8-6.78 700-988 | 100-170 22000-37400 |
| 5LZ197×7.0 L-4-840 | 197 7 3/4 | 251-311 9 7/8-12 1/4 | 5 1/2 REG 6 5/8 REG | 5:06 | 4 | 1113-2225 295-588 | 79-158 | 3.2-4.52 466-655 | 150-200 33000-44000 |
| 5LZ197×7.0 L-5-840 | 197 7 3/4 | 251-311 9 7/8-12 1/4 | 5 1/2 REG 6 5/8 REG | 5:06 | 5 | 1113-2225 295-588 | 79-158 | 4-5.65 585-824 | 150-200 33000-44000 |
| 5LZ203×7.0 L-4-840 | 203 8 | 251-311 9 7/8-12 1/4 | 5 1/2 REG 6 5/8 REG | 5:06 | 4 | 1113-2225 295-588 | 79-158 | 3.2-4.52 466-655 | 155-250 34100-55000 |
| 5LZ203×7.0 L-5-840 | 203 8 | 251-311 9 7/8-12 1/4 | 5 1/2 REG 6 5/8 REG | 5:06 | 5 | 1113-2225 295-588 | 79-158 | 4-5.65 585-824 | 155-250 34100-55000 |
| 7LZ127×7.0 L-4-896 | 127 5 | 149-200 5 7/8-7 7/8 | 3 1/2 REG 3 1/2 REG | 7:08 | 4 | 745-1489 196-393 | 130-261 | 3.2-4.52 466-655 | 49-100 10803-22000 |
| 7LZ140×7.0 L-5-810 | 140 5 1/2 | 171-222 6 3/4-8 3/4 | 4 1/2 REG 4 1/2 REG | 7:08 | 5 | 794-1587 210-419 | 95-190 | 4-5.65 585-824 | 49-100 10803-22000 |
| 7LZ172×7.0 L-5-914 | 172 6 3/4 | 213-251 8 3/8-9 7/8 | 4 1/2 REG 4 1/2 REG | 7:08 | 5 | 1183-2366 312-625 | 84-168 | 4-5.65 585-824 | 100-170 22000-37400 |
| 7LZ172×7.0 L-6-914 | 172 6 3/4 | 213-251 8 3/8-9 7/8 | 4 1/2 REG 4 1/2 REG | 7:08 | 6 | 1183-2366 312-625 | 84-168 | 4.8-6.78 700-988 | 100-170 22000-37400 |
| 7LZ185×7.0 L-7-840 | 185 7 1/4 | 222-251 8 3/4-9 7/8 | 4 1/2 REG 6 5/8 REG | 7:08 | 7 | 1164-2328 308-615 | 78-156 | 5.6-7.7 819-1126 | 100-170 22000-37400 |
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To: Hebei Ruishi Bits Manufacturing Co.,Ltd
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No. 502, Taishan North Road, Renqiu Economic Development Zone, Hebei China
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