Qes directional drilling12/23/2023 Exceeding the absolute overpull may cause the motor to part. Absolute overpull: The maximum load that can be applied to the motor, based on the strength of the bearing assembly, if the bit is stuck.Operations can continue if the bit comes free without the working overpull being exceeded. Working overpull: The maximum load that can be applied to the motor, based on the strength of the bearing assembly, if the bit is stuck.RNBS bit to stabilizer: Length from the shoulder of the bit box of the rotating near-bit stabilizer drive shaft to the stabilizer on the RNBS drive shaft.RNBS bit to bend: Length from the shoulder of the bit box of the rotating near-bit stabilizer drive shaft to the bend of the motor.Stabilizer to bit box: Length from the shoulder of the bit box to the center of the bearing housing stabilizer.Bend to bit box: Length from the shoulder of the bit box to the bend of the motor. ![]() Length: Nominal length of the motor, including the top sub / dump valve.Max power: Maximum power that the motor is capable of delivering.Should drilling conditions be favorable, the pressure differential may be allowed to reach the maximum. Differential operating pressure: Recommended maximum differential pressure for extended motor life, which is 80% of the differential pressure at maximum motor horsepower.Operating torque: Torque output at recommended differential pressure levels for extended motor life. ![]() Speed: Revolutions per minute for an unloaded motor operating within the normal flow rate range.Rev/unit volume: Number of revolutions per unit of fluid pumped through the motor.Max flow with bypass: Maximum flow allowed with bypass nozzle the limit is dictated by the flow through the driveshaft.The overall flow through a mud motor can be increased by fitting a nozzle in the rotor and bypassing some of the flow through the center of the motor. Flow: Normal operating flow range of the motor without a bypass nozzle.Stages: Power section stages within the stator.Lobes: Rotor-stator lobe ratio for the power section.OD: Nominal outer diameter of the motor.There are 18 Drilling Mud Motor Specifications Items that can help in motor selection. PDC bits may require a lobe configuration closer to the middle such as a 3:4 or 4:5. PDC bits do better with higher rpm but also generate more torque. The low lobe configuration would be considered high-speed, low-torque motors. These types of b i ts drill better with high rpm. If the well was to be drilled with a diamond or impregnated bit, the directional driller would choose the lower lobe configuration. Vam Top Connection Datasheet You Never Seen.The higher lobe configuration would be considered a slow-speed, high-torque motor. As in hard formation drilling with insert bits, the directional driller will choose a higher lobe configuration because insert bits do not tolerate high rpm and more bit weightis required to drill in hard rock. In brief, As the lobe number increases, the motor torque will increase and the rpm will decrease. At the same time drilling engineer will not be able to make a proper selection without a full understanding of the drilling mud motor specification and limitations. In this article, we shall introduce to you the drilling mud motor selection for its specification. ![]() Motor selection is a function of the well requirements.
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