2 7/8" Ultra-short External Spiral PDM Motor for Coal Mining Drilling

Product Introduction

Engineered for the demanding conditions of underground coal mining, this 2 7/8" ultra-short external spiral positive displacement mud motor (PDM) is a critical component for directional drilling. Featuring a fixed 1.25° bent housing and standard 2 7/8REG connections on both ends, it efficiently converts the hydraulic energy of water-based drilling fluids into powerful mechanical torque. The motor boasts a solid metallic finish and a compact, heavy-duty profile that feels exceptionally dense, reflecting its high-strength alloy steel construction. By utilizing an optimized hydraulic model, this downhole motor delivers a steady, high-torque output even under low pressure drops, significantly increasing the rate of penetration (ROP) and shortening project timelines. It is perfectly compatible with various measurement-while-drilling (MWD) systems and multiple drill bit specifications, ensuring precise trajectory control in complex geological formations. Whether deployed for gas drainage boreholes, water exploration, or geological probing, this steel helical rotor-stator motor provides the reliability and adaptability required for continuous coal seam drilling operations.

Product Advantage

Xinyongjia hydraulic downhole mud motors have obtained official API international certification. Key advantages of our coal mine downhole mud motors are listed below:

1.This positive displacement mud motor takes clean water as driving medium, suitable for water-based drilling operation of underground coal mine PDM drilling motor without complex mud circulation system.

2.Equipped with professional triple anti-drop assembly, the coal mine downhole mud motor greatly lifts safety coefficient during underground drilling and avoids falling accidents in boreholes.

3.Our hydraulic PDM drilling motor adopts heavy-duty durable drilling configuration, which extends service life and delivers stable performance in tough coal seam drilling environments.

Product Advantage

Xinyongjia hydraulic downhole mud motors have obtained official API international certification. Key advantages of our coal mine downhole mud motors are listed below:

4.The outer contour of this downhole mud motor supports optional slick surface, spiral design or spiral structure with three straight blades to satisfy diverse coal mine borehole drilling demands.

5.Customers can select non-magnetic material or high-strength alloy steel for the coal mine screw motor to fit various complex underground coal mine drilling working conditions.

Technical Parameters

Product Uses

Application Scenarios of Xinyongjia 5LZ73X7.0-5 Hydraulic Steel Screw Motor

1. Coal Mine Gas Drainage Drilling

   Delivering consistent, high-torque power for underground horizontal boreholes, this 2 7/8-inch small-size mud motor is instrumental in coalbed methane extraction. Its ultra-short and compact outer diameter allows it to navigate narrow mine tunnels with exceptional agility. This maneuverability facilitates highly efficient underground gas drainage construction, ultimately improving overall mine safety and accelerating gas extraction rates.

2. Coal Mine Roadway & Side Drilling

   The miniature hydraulic steel screw motor is specifically engineered to adapt to the severe spatial constraints of underground coal mines. It excels in executing sidetracking and branch hole drilling within challenging coal rock layers. By providing precise directional control in confined areas, it significantly improves the construction efficiency and structural integrity of critical mine roadway reinforcement projects.

3. Coalfield Geological Exploration Drilling

   Ideal for complex coalfield geological surveys, this drilling mud motor provides the stable mechanical power output necessary to penetrate mixed coal-rock formations. Its precise directional capabilities make it the perfect tool for executing short-distance exploration holes. This allows mining operators to accurately probe geological structures and water sources ahead of primary excavation, mitigating operational risks.

Product Operate Guide

Xinyongjia Downhole Motor Manual(Chinese -English)

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