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Mud motor

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ZLCONN Mud motor Usage 

It is one kind of positive displacement downhole motor, with working principle is to convert the high pressure fluid power of mud into mechanical energy for bit rotation. It is widely used in oil field and mine directional well and horizontal well, cluster Wells and vertical Wells,HDD Machine drilling, deflecting, adjusting azimuth, coring, reaming, side tracking and workover treatment, and also applied in some special operations as compound drilling and traversing, etc.

ZLCONN Advantages

The enterprise regards the product quality as vital for development. It boasts 80 sets of world-leading CNC spiral milling machines, CNC lathes, pipe thread lathes, CNC machining centers and other equipment.

HDD Power Section Designs – the displacement of our power sections were carefully matched to the mud pumps commonly found on major OEM directional drilling machines. It is this precise match that gives our motors exceptional HDD performance.
Slow Speed – the motor operates at a speed more compatible with roller bits. This significantly lengthens bit life with increased on bottom time and fewer round trips.
High Torque – more set down weight can be put on bit for faster penetration with reserve power for the hard spots.
Oil Filled Bearing Section – pre-pressured and pressure compensated bearing section provides long seal life and more dependable bearing operation.

Regarding product quality as the life for development, the enterprise boasts 60 sets of testing equipments, instruments and tools such as advanced non-destructive testing machine, coordinate measuring instrument, spectrometer, which ensure product quality and performance in terms of facilities. The company boasts a large contingent of veteran and skilled staff, implements various operation regulations, and engages in the production in strict compliance with product processes. Products are manufactured by all passed Factory Acceptance Tests (FATs) in strict accordance with standards, thus ensuring to excel their domestic counterparts and achieve a leading position in the aspects of applicability, reliability, safety and economical efficiency, etc.

ZLCONN Mud motor Options

A Variof Types & the Capabilities In accordance with the actual drilling needs, we push out high, midiem and low speed hdd downhole motors, of a variety of types with different functional configuration and application for all working conditions.

Standard type Standard motor, mud lubricating transmission shaft, straight, single and double bent.

Long typeThe torque is increased by 30%to 60%than standard ones, mud lubricating transmission shaft, straight, single and double bent.

High flow rate type the adoption of hollow rotor and different sizes of hard alloy jet nozzle to increase the incoming flow and bit power.

High deflection type the unique structure design makes the overall length shorter and bent housing closer to the bit, deflection rate reach up to 1/m, so as to keep good working conditions.

High temperature resistance type the motor stator is made of superior quality high temperature resistant rubber, which enables the motor to perform stably in the well bottom at max. 175 C.

Oil-stransmission shaft typeealed improves the working condition of thrust bearing and radial bearing, and increases the life span of each single trip.

Bend angle adjustable type we equip the motors with adjustable bend housing in different types and sizes, and through which before dropping we can adjust the bend angle.

Saturated saltwater mud resistance type the special coating on the rotor with strong ability of anti-corrosion and wear-resistance enables the motor to work stably for a long time in the condition of saturated saltwater mud.

Impact Resistance Type adopt a series of shock absorbers to lighten or eliminate bit jumping and impact shock occurring in drilling, protect the drilling tools avoiding damage, increase service life and ensure the drilling safe and efficient. ( style impact resistance downhole motor is our new technology patent products. Patent No ZL2011 2 0000193.2)

ZLCONN Mud motor Parameters

ModelThreadFlow Rate


Rotary Speed


Working pressure loss


Output Torque


Max Pressure Loss


Max Torque


Working Pressure


Output Power


5LZ120X7.0-3 3 1/2REG 694-1388140-278 2.41620  3.39228849  57
5LZ120X7.0-4  3 1/2REG 694-1388140-278 3.2 21604.522869 49 71 
5LZ120X7.0-5 3 1/2REG  650-1300 140-280 42344 5.65  331249  87
7LZ120X7.0-43 1/2REG745-1489 130-261  3.224684.52 3277 49 75 
7LZ120X7.0-6.53 1/2REG745-1489130-261  5.24010 7.35 5325 49122
7LZ120X7.0-73 1/2REG 516-1030128-256 5.628297.91  3997 4985 

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