Customized 3 1/2" Steel Spiral Groove PDM Drilling Mud Motor for Coal Mining

Product Introduction

Engineered specifically for the demanding and restricted environments of underground coal mining, this customized 3 1/2" (89mm) outer diameter positive displacement mud motor (PDM) expertly transforms the hydraulic energy of drilling fluids into powerful, consistent mechanical torque. At its core, the tool features a precision-machined 5:6 rotor-stator lobe configuration, which strikes an optimal balance between rotational speed and torque output, allowing operators to effortlessly navigate through alternating soft and hard coal seams. The motor incorporates a fixed 1.25° bent housing equipped with robust 2 3/8REG connections at both ends, delivering a highly predictable build rate essential for complex trajectory control in gas drainage boreholes and water exploration tasks. During operation, drilling crews can monitor the 5.0 to 7.5 Mpa working pressure drop to gauge real-time bit weight feedback, facilitating immediate adjustments to maximize the rate of penetration. The metallic surface feels reassuringly solid, treated with advanced wear-resistant coatings that withstand the abrasive nature of coal rock cuttings. By utilizing a heavy-duty steel helical structure, this directional drilling motor ensures steady power delivery, significantly reducing vibration noise in the tunnel and drastically improving the efficiency of your subterranean geological probing 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

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

   This compact 3 1/2 inch (89mm) outer diameter mud motor delivers exceptionally steady torque specifically calibrated for creating long horizontal boreholes in underground environments. Its streamlined profile easily navigates through narrow, confined mine tunnels without compromising power. By providing precise directional control through its 1.25° bent housing, it facilitates the highly efficient extraction of coalbed methane and the construction of complex underground gas drainage networks, ultimately reducing volatile gas risks before major excavation begins.

2. Coal Mine Roadway & Side Drilling

   Adapting flawlessly to the spatial limitations of subterranean operations, this miniature hydraulic steel screw motor excels in roadway reinforcement. It executes precise sidetracking and branch hole drilling within fractured coal rock layers. The motor's smooth operation and optimized 5:6 lobe configuration minimize surrounding strata disturbance, accelerating the installation of roof supports and significantly improving the overall construction efficiency for critical mine roadway reinforcement works.

3. Coalfield Geological Exploration Drilling

   When conducting vital coalfield geological surveys, this drilling mud motor provides the reliable power output necessary to penetrate unpredictable, mixed coal-rock formations. It is highly suitable for executing short-distance directional exploration holes, allowing mining engineers to accurately map seam thickness and detect hidden geological faults. The consistent rotational speed ensures high-quality core sampling and precise trajectory logging throughout the entire geological exploration phase.

Product Operate Guide

To ensure the maximum operational lifespan and optimal performance of your customized 3 1/2 inch steel spiral groove PDM drilling mud motor, we provide a comprehensive bilingual operation manual. This essential guide covers critical procedures, including pre-deployment surface testing, proper handling of the 1.25° bent housing, and precise fluid pressure management to maintain the 5.0 to 7.5 Mpa working pressure drop. It also details routine maintenance protocols for the triple anti-drop assembly and the steel helical rotor-stator structure. By strictly adhering to these manufacturer-approved guidelines, your on-site technicians can safely maximize the mechanical drilling speed, prevent premature wear of the alloy steel components, and effectively troubleshoot common underground directional drilling challenges. Click the button below to access the full documentation.

Xinyongjia Downhole Motor Manual(Chinese -English)

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