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Cangzhou Great Drill Bits Co.,Ltd.
Cangzhou Great Drill Bits Co.,Ltd.
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Downhole motor

Downhole motor

GREAT DRILL BITS can be customized and supply various sizes , type downhole motor according to the drilling demand .

Downhole motor (Mud motor)  is a powered by drilling fluid that converts liquid pressure energy into mechanical energy . 

GREAT DRILL BITS can be manufacture and supply various sizes , type downhole motor according to the drilling demand .

Downhole motor is composed of four assemblies of by-pass value,motor,cardan shaft and drive shaft .

Until now it is popular use in Horizontal directional drilling and oil&Gas drilling. 



How does a downhole motor work ?


Mud stream from the outlet of mud pump flows through a by-pass valve into the downhole motor .This stream produces pressure loss between inlet and outlet of the motor to push the motor rotating around the stator's axis,then transmits rotation speed and torque to the PDC bit or tricone bit by universal shaft and drive shaft to implement the well operation.

Power section in various lobes, stages and lead distance can be designed according to drilling parameters.


High Speed / Low Torque Power Section

Power section in this type is suitable to PDC bit, soft formation and directional drilling operation.


Medium Speed / Medium Torque Power Section

Motor with lobe 5:6 is commonly used in generally directional and horizontal drilling well. 

For example, motor in 5:6 lobe can be used by matching with PDC bit or tricone bit for drilling rock.


Low Speed / High Torque Power Section

Motor with lobe 7:8 is commonly used in medium hard formation for directional drilling and horizontal drilling matching with PDC bit or tricone bit.


Our mainly sizes : 95mm ,102mm,120mm,127mm,165mm,172mm,244.5mm.


For more understanding technological parameters ,please donot hesitate to contact with our sales representative .

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