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Oil based drilling fluid system has plenty of advantages such as stronger adaptive faculty of wells' temperature, nice protection from reservoir and anti-pollution of gypsum. Therefore,
oil resistant screw drilling downhole motor is a significant type of Downhole Motors. Oil resistant PDM drills solve the problem about short service life caused by oil base. Oil
resistant downhole motors are more durable than normal downhole motors.
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.
Constitution: Downhole motor is composed of five assemblies: by-pass valve, motor, anti-drop, cardan shaft and drive shaft.
The down-hole motor is a positive-displacement down-hole motor. It converts the high pressure fluid power of the mud into the mechanical energy of drill bit rotation. The motor is
widely used in the drilling, making inclination, adjusting azimuth, coring, reaming, side tracking and work over for the directional wells, horizontal wells side tracked wells and straight
wells of oilfields and coal mines. In addition, it is suitable for compound drilling and traversing and other special works.
Table for oil base mud resistant downhole motors' specifications and models:
Code of motor | Unit | 5LZ185×7.0 | 7LZ185.5×7.0 | 5LZ197×7.0 | 5LZ197.5×7.0 | 5LZ203×7.0 |
Recommend Hole Size | mm | 215-244 | 215-244 | 244-311 | 244-311 | 244-311 |
Recommend Hole Size | in | 81/8-95/8 | 81/8-95/8 | 91/8-123/6 | 95/8-121/8 | 95/8-121/4 |
Input flow Rate | L/S | 20-35 | 20-35 | 20-40 | 20-40 | 20-40 |
Motor Pressure Loss | MPa | 4 | 4 | 3.2 | 4 | 3.2 |
Speed of the Bit | r/min | 184 | 173 | 61-122 | 85-160 | 70-155 |
Working Torque | N.m | 5436 | 5939 | 8067 | 7223 | 7002 |
Delay Dynamic Torque | N.m | 8154 | 8908 | 14118 | 12640 | 12289 |
Output Power | KW | 80-140 | 80-140 | 57.6-115.2 | 72-144 | 57.6-126.7 |
Recommend Drilling Weight | KN | 120 | 120 | 120 | 130 | 150 |
Maxing Drilling Weight | KN | 240 | 240 | 240 | 260 | 240 |
Thread Connection Top |
| 41/2REG | 41/2REG | 51/2REG | 51/2REG | 51/2REG |
63/8REG | 63/8REG | 63/8REG | ||||
Thread Connection Bottom |
| 61/2REG | 61/2REG | 63/8REG | 63/8REG | 63/8REG |
The Drill Length | mm | 8120 | 8090 | 7998 | 8980 | 8100 |
Code of motor | Unit | 5LZ203.5×7.0 | 5LZ216×7.0 | 5LZ216.5×7.0 | 5LZ244×7.0 | 7LZ244.5×7.0 |
Recommend Hole Size | mm | 244-311 | 273-323 | 273-323 | 311-445 | 311-445 |
Recommend Hole Size | in | 95/8-121/4 | 103/4-123/4 | 103/4-123/4 | 121/2-171/2 | 121/2-171/2 |
Input flow Rate | L/S | 20-40 | 22-48 | 22-48 | 50-75 | 50-75 |
Motor Pressure Loss | MPa | 4 | 3.2 | 4 | 3.2 | 4 |
Speed of the Bit | r/min | 70-155 | 61-138 | 61-138 | 91-136 | 91-136 |
Working Torque | N.m | 8778 | 8895 | 11117 | 15124 | 18905 |
Delay Dynamic Torque | N.m | 15362 | 15567 | 19455 | 26468 | 33085 |
Output Power | KW | 72-158.4 | 63.36-138.29 | 79.2-172.8 | 144-216 | 180-270 |
Recommend Drilling Weight | KN | 170 | 190 | 238 | 200 | 250 |
Maxing Drilling Weight | KN | 260 | 300 | 378 | 360 | 450 |
Thread Connection Top |
| 51/2REG | 63/8REG | 63/8REG | 63/8REG | 63/8REG |
63/8REG | ||||||
Thread Connection Bottom |
| 63/8REG | 63/8REG | 63/8REG | 73/8REG | 73/8REG |
The Drill Length | mm | 8990 | 8100 | 8950 | 9480 | 10280 |
Product Categories : Drilling Motors > Motors For Drilling
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