N151-35 NJ200-01.21 Idler gear

Introduction

In the global oil and gas drilling industry, the NJ200 series drilling machinery and SDPROS-equipped equipment are widely recognized for their durability and efficiency, serving as the backbone of onshore and offshore drilling operations. However, the stable operation of these critical machines heavily depends on the quality and compatibility of their spare parts. On-site teams frequently face frustrating and costly challenges: mismatched components that delay installation, low-quality parts that fail prematurely, and a lack of clear technical guidance when faults occur. These issues often lead to unplanned downtime, compromised operational safety, increased maintenance costs, and missed project deadlines—pain points that drilling contractors, maintenance teams, and equipment managers struggle with daily.

Our spare part supply is specifically engineered to eliminate these obstacles, focusing on a comprehensive range of components tailored for NJ200 series drilling machinery (including sub-models NJ200-01, NJ200-02, NJ200-03, NJ200-04, NJ200-05, NJ200-06, NJ200-07, NJ200-08, NJ200-10, NJ200-11A, NJ200-12A, NJ200-14) . From core assemblies like unit heads, backup tongs, and hydraulic motor systems to small but critical parts such as idler gears, retainer rings, and hexagon head bolts, every product we supply is manufactured to meet or exceed original equipment specifications. Adhering to authoritative industry standards—including API (American Petroleum Institute) 7K, ISO 9001 quality management system, and NFPA (National Fire Protection Association) guidelines—our parts ensure seamless compatibility, long service life, and reliable performance in the harshest drilling environments.

Core Purpose & Target User Needs

Core Purpose

The core purpose of our supplied spare parts is to deliver direct, high-reliability replacements for NJ200 series drilling machinery and SDPROS-compatible equipment, ensuring each component integrates seamlessly with your existing systems without modifications. Every part—from the N151-35 NJ200-01.21 Idler gear (SDPROS-compatible) and N15-1 NJ200-01.00 Unit head to the N154-74 Hydraulic motor JH-100 and N15-20 NJ200-07.02.00 Integrated hydraulic pipe assembly—is precision-manufactured to match the original’s dimensional accuracy, material quality, and performance requirements. We aim to minimize equipment downtime, reduce maintenance costs, enhance operational safety, extend the service life of your machinery, and provide a reliable supply chain that supports both emergency replacements and regular maintenance schedules.

Target User Segmentation & Needs

• Oilfield Drilling Contractors: Need a comprehensive range of compatible spare parts for NJ200 series machinery to avoid unplanned downtime during high-intensity drilling operations. Key needs include quick access to core assemblies (unit heads, backup tongs, hydraulic systems), reliable small parts (bolts, springs, retainer rings), and professional technical guidance to resolve on-site faults—all at a cost-effective price point.

• On-Site Maintenance Teams: Require easy-to-install, durable spare parts that eliminate the need for equipment modifications. They need clear maintenance guidelines, fault diagnosis support, and parts that can withstand harsh drilling conditions (corrosion, vibration, extreme temperatures)—such as corrosion-resistant hydraulic pipes, wear-resistant idler gears, and robust braking assemblies.

• Drilling Equipment Service Providers: Need a full inventory of NJ200 series and SDPROS-compatible spare parts (from assemblies to small components) to serve multiple client needs. They prioritize product quality, 100% compatibility, and timely supply to improve service efficiency, reduce client downtime, and enhance customer satisfaction.

• Equipment Asset Managers: Focus on extending the service life of NJ200 series and SDPROS equipment while controlling maintenance costs. They need spare parts that comply with industry standards, have a proven track record of reliability, and come with technical support to optimize maintenance schedules and reduce long-term operational expenses.

• SDPROS Equipment Operators: Require specialized parts like the N151-35 NJ200-01.21 Idler gear that are fully compatible with SDPROS systems, ensuring seamless integration and stable performance to avoid safety hazards and operational disruptions.

Product Introduction

We specialize in supplying a complete range of high-quality spare parts exclusively for NJ200 series drilling machinery and SDPROS-compatible equipment. All products are manufactured using premium materials, advanced CNC precision machining technology, and strict quality control processes to ensure perfect compatibility with original equipment, stable performance, and resistance to the harsh conditions of drilling operations. Our product lineup covers six key categories, each designed to support critical functions of your drilling machinery:

1. Core Assemblies

These are the foundational components of NJ200 series drilling machinery, responsible for core operational functions such as power transmission, clamping, and hydraulic control. Key models include:

• N15-1 NJ200-01.00 Unit head: The "heart" of the NJ200-01 series machinery, integrating power transmission and control systems to drive drilling operations. It includes critical internal components such as gears, shafts, and bearings, all pre-assembled for easy installation.

• N15-10 NJ200-02.00 Backup tong: A critical safety component used to clamp and secure drill pipes during drilling, tripping, and well completion operations. It ensures stable clamping force to prevent drill pipe slipping and potential accidents.

• N15-20 NJ200-07.02.00 Integrated hydraulic pipe assembly: A pre-assembled hydraulic pipe system for NJ200-07 series machinery, designed to transmit hydraulic oil between components (e.g., hydraulic motors, cylinders) with minimal pressure loss and no leakage.

• N15-12 NJ200-03.00 Support bracket: Provides structural support for key components (e.g., unit heads, hydraulic systems) on the drilling platform, ensuring stability during high-vibration drilling operations.

• N15-14 NJ200-06.00 Guide rail roller assembly: Facilitates smooth movement of sliding components (e.g., backup tongs) on the drilling platform, reducing friction and ensuring precise positioning.

2. Transmission & Gear Components

These components are responsible for transmitting power from the unit head to the drilling bit, ensuring smooth speed adjustment and stable operation. Key models include:

• N151-35 NJ200-01.21 Idler gear (SDPROS-compatible): A critical gear in the NJ200-01 series transmission system, used to adjust the direction of power transmission and maintain stable gear meshing. It is made of high-strength alloy steel for wear resistance.

• N151-36 NJ200-01.22 Retainer ring: Secures idler gears (N151-35) and other rotating components in place, preventing axial movement and ensuring stable transmission. It features a durable design to withstand high rotational speeds.

• N151-39 NJ200-01.24 Idler gear shaft sleeve: Protects the idler gear shaft from wear and misalignment, ensuring smooth rotation and extending the service life of both the shaft and gear.

• N154-21 NJ200-02.14 Walking gear: Transmits power to the drilling machinery’s walking mechanism, enabling smooth movement of the equipment on the drilling platform. It features a precision tooth profile for quiet, efficient operation.

3. Hydraulic System Components

These components control the flow and pressure of hydraulic oil, powering critical functions such as clamping (backup tongs), lifting, and movement. Key models include:

• N154-74 Hydraulic motor JH-100: Provides power for hydraulic systems in NJ200 series machinery, delivering stable torque and speed to drive hydraulic components. It is designed for high efficiency and durability in high-pressure environments.

• N155-1 NJ200-02.08.01 Oil cylinder main body: The core component of hydraulic cylinders, housing the piston and transmitting hydraulic force to drive linear movement (e.g., backup tong clamping). It is made of high-strength steel to withstand high internal pressure.

• N155-5 NJ200-02.08.02 Piston & N155-6 NJ200-02.08.03 Piston gland: Work together to convert hydraulic pressure into linear force. The piston features a tight seal to prevent oil leakage, while the piston gland secures the piston in place.

• N154-1 Torque gauge Y-60(0-25MPa): Measures hydraulic system pressure in NJ200-02 series machinery, providing real-time pressure readings to ensure the system operates within safe limits. It is easy to install and read on-site.

4. Structural & Protective Components

These parts provide structural support, protection, and positioning for other components, ensuring the overall stability and safety of the drilling machinery. Key models include:

• N151-1 NJ200-01.01 Unit head shell & N151-25 NJ200-01.15 Unit head cover: Protect the internal components of the unit head (gears, shafts, bearings) from dust, drilling fluid, and other contaminants, extending their service life.

• N151-89 NJ200-01.48 Cabinet: Houses electrical and hydraulic control components, providing protection from harsh environmental conditions (moisture, dust, vibration) and ensuring safe operation.

• N15-15 NJ200-04 Guide rail & N15-17 NJ200-05 Rack: Work together to guide the movement of sliding components (e.g., backup tongs) on the drilling platform, ensuring precise positioning and smooth operation.

• N151-99 NJ200-01.55 Position block & N151-62 XYQ12.Z-60 Position block: Ensure precise positioning of components (e.g., gears, shifting mechanisms) to prevent misalignment and ensure stable operation.

5. Shifting & Braking Components

These components control the speed and direction of the drilling machinery and ensure safe braking to prevent accidents. Key models include:

• N151-61 NJ200-01.39.00 Gear shifting mechanism assembly & N151-67 NJ200-07.42.00 Gear shifting mechanism assembly: Control the speed and direction of the transmission system, enabling smooth speed changes to adapt to different drilling conditions.

• N151-103 Braking assembly: Provides reliable braking force to stop the rotation of the drill pipe or transmission system quickly, ensuring safety during drilling and tripping operations. It includes brake discs, friction pads, and control components.

6. Small Components & Fasteners

These small but critical parts ensure the proper assembly and operation of the drilling machinery, with models including:

• N15-22 NJ200-04-1 Hexagon head bolt: Used to secure components (e.g., guide rails, support brackets) together, featuring high tensile strength to withstand vibration and high loads.

• N151-66 XYQ3C.Z-21 Spring: Provides elastic force for braking systems, shifting mechanisms, and other components, ensuring proper reset and stable performance.

• N154-20 NJ200-02.13 Flat key: Connects rotating components (e.g., gears, shafts) to transmit torque, ensuring tight engagement and smooth power transmission.

• N15-8 NJ200-11A Name plate & N151-16 NJ200-12A Operation illustration plate: Provide critical information (equipment model, operation guidelines) for on-site personnel, ensuring safe and proper operation.

Function Description

1. Core Assemblies Functions

• Power Transmission: The N15-1 NJ200-01.00 Unit head integrates power sources and transmission components to deliver stable power to the drilling bit, ensuring efficient drilling operations. It adjusts power output based on drilling conditions to optimize performance.

• Drill Pipe Clamping: The N15-10 NJ200-02.00 Backup tong clamps drill pipes tightly during drilling, tripping, and well completion, preventing slipping and ensuring operational safety. It uses hydraulic force to provide adjustable clamping pressure.

• Hydraulic Fluid Transmission: The N15-20 NJ200-07.02.00 Integrated hydraulic pipe assembly transmits hydraulic oil between hydraulic components (motors, cylinders) with minimal pressure loss, ensuring smooth operation of hydraulic systems.

• Structural Support: The N15-12 NJ200-03.00 Support bracket and N15-14 NJ200-06.00 Guide rail roller assembly provide stability for key components, reducing vibration and ensuring precise movement of sliding parts.

2. Transmission & Gear Components Functions

• Power Direction & Speed Adjustment: The N151-35 NJ200-01.21 Idler gear adjusts the direction of power transmission in the NJ200-01 series, working with other gears to maintain stable speed and torque output. It ensures smooth gear meshing to reduce wear and noise.

• Component Securing: The N151-36 NJ200-01.22 Retainer ring secures idler gears and other rotating components in place, preventing axial movement that could cause misalignment and transmission failure.

• Wear Protection: The N151-39 NJ200-01.24 Idler gear shaft sleeve protects the idler gear shaft from wear and corrosion, ensuring smooth rotation and extending the service life of both the shaft and gear.

• Equipment Movement: The N154-21 NJ200-02.14 Walking gear transmits power to the machinery’s walking mechanism, enabling smooth movement on the drilling platform to adjust the drilling position.

3. Hydraulic System Components Functions

• Hydraulic Power Supply: The N154-74 Hydraulic motor JH-100 converts hydraulic pressure into mechanical power, driving hydraulic components (e.g., backup tongs, cylinders) to operate. It delivers stable torque and speed for consistent performance.

• Linear Force Transmission: The N155-1 Oil cylinder main body, N155-5 Piston, and N155-6 Piston gland work together to convert hydraulic pressure into linear force, driving the movement of components like backup tongs for clamping.

• Pressure Monitoring: The N154-1 Torque gauge Y-60(0-25MPa) measures hydraulic system pressure in real time, alerting on-site personnel to abnormal pressure levels that could indicate system faults (e.g., leakage, blockage).

• Component Connection: The N154-2 NJ200-02.01 Torque gauge connector and N154-13 NJ200-02.09 Hollow bolt ensure tight, leak-proof connections for hydraulic components, maintaining system pressure and preventing oil leakage.

4. Structural & Protective Components Functions

• Component Protection: The N151-1 Unit head shell, N151-25 Unit head cover, and N151-89 Cabinet protect internal components from dust, drilling fluid, moisture, and physical damage, extending their service life and ensuring stable operation.

• Precise Positioning: The N151-99 and N151-62 Position blocks ensure components like gears and shifting mechanisms are aligned correctly, preventing misalignment that could cause wear, noise, or failure.

• Movement Guidance: The N15-15 Guide rail and N15-17 Rack guide the movement of sliding components (e.g., backup tongs), ensuring precise positioning and smooth operation, which is critical for accurate drilling.

5. Shifting & Braking Components Functions

• Speed & Direction Control: The N151-61 and N151-67 Gear shifting mechanism assemblies allow on-site personnel to adjust the speed and direction of the transmission system, adapting to different drilling depths and geological conditions.

• Safe Braking: The N151-103 Braking assembly provides reliable braking force to stop the drill pipe or transmission system quickly, preventing accidents during drilling, tripping, or emergency situations. It ensures smooth engagement and disengagement to reduce wear.

6. Small Components & Fasteners Functions

• Component Securing: The N15-22 Hexagon head bolt secures components together, withstanding vibration and high loads to ensure the overall stability of the drilling machinery.

• Elastic Reset: The N151-66 Spring provides elastic force for braking systems, shifting mechanisms, and other components, ensuring they reset properly after operation and maintain stable performance.

• Torque Transmission: The N154-20 Flat key connects rotating components (gears, shafts) to transmit torque, ensuring tight engagement and smooth power transmission without slipping.

• Information Provision: The N15-8 Name plate and N151-16 Operation illustration plate provide critical information (equipment model, operation steps) for on-site personnel, ensuring safe and proper operation of the machinery.

Structural Features

1. General Structural Features (All Product Categories)

• Precision Machining: All parts are manufactured using CNC precision machining equipment, with strict control of dimensional accuracy (tolerance within ±0.01mm) and surface roughness. This ensures perfect compatibility with original NJ200 series and SDPROS equipment, no installation gaps, and stable operation after replacement.

• Premium Material Selection: Key components are made of high-strength alloy steel (ASTM A105, AISI 4140), stainless steel, or wear-resistant engineering plastics—selected based on the specific function and working environment of each part. This ensures high structural strength, wear resistance, and corrosion resistance.

• Strict Heat Treatment: Mechanical components such as idler gears (N151-35), walking gears (N154-21), and oil cylinder main bodies (N155-1) undergo professional heat treatment (quenching, tempering, carburizing), which improves their hardness, toughness, and wear resistance, enabling them to withstand high loads, vibration, and impact during drilling operations.

• Easy Installation: All parts are designed to match the original equipment’s installation structure, with simple and reasonable installation steps. No modifications to the original equipment are required, and maintenance personnel can complete replacement and installation quickly with common tools.

• Corrosion & Wear Resistance: Critical components are treated with anti-corrosion coatings (chrome plating, zinc plating) or made of corrosion-resistant materials to withstand the harsh drilling environment—including salt spray (offshore), drilling fluid, and moisture. This extends the service life of parts and reduces maintenance frequency.

2. Category-Specific Structural Features

• Core Assemblies: Unit heads (N15-1) and backup tongs (N15-10) feature a modular design for easy disassembly and maintenance; integrated hydraulic pipe assemblies (N15-20) have pre-assembled pipes and fittings to reduce installation time and prevent leakage.

• Transmission & Gear Components: Idler gears (N151-35) have a precision tooth profile design for smooth meshing and low noise; retainer rings (N151-36) feature a flexible, durable design to ensure a tight fit without damaging other components.

• Hydraulic System Components: Oil cylinder main bodies (N155-1) have a thickened wall design to withstand high internal pressure (up to 35MPa); pistons (N155-5) use high-temperature resistant seals to prevent oil leakage in high-pressure environments.

• Structural & Protective Components: Unit head shells (N151-1) and cabinets (N151-89) have reinforced structures to withstand vibration and physical impact; guide rails (N15-15) have a smooth surface to reduce friction and ensure smooth movement of sliding components.

• Small Components & Fasteners: Hexagon head bolts (N15-22) have a high-strength thread design for tight engagement and anti-loosening; springs (N151-66) are made of high-elasticity steel to maintain their elastic force after long-term use.

Applicable Working Conditions

Our spare parts are specifically designed to withstand the harsh working conditions of oil and gas drilling operations, with strong environmental adaptability, and are fully compatible with NJ200 series drilling machinery and SDPROS-compatible equipment in the following scenarios:

1. Onshore & Offshore Drilling Platforms

Suitable for both onshore (desert, grassland, mountain, and plain) and offshore (marine) drilling environments. Our parts resist corrosion from salt spray (offshore), dust (onshore), and moisture, ensuring stable performance even in high-humidity (relative humidity up to 95%) or salt-rich environments. For example, hydraulic pipes (N15-20) and idler gears (N151-35) are treated with anti-corrosion coatings to extend service life in marine environments.

2. High-Load & Long-Duration Drilling Operations

Ideal for high-intensity, 24/7 continuous drilling operations—including deep well, ultra-deep well, and horizontal well drilling. Components such as unit heads (N15-1), hydraulic motors (N154-74), and idler gears (N151-35) have high load-bearing capacity and fatigue resistance, withstanding long-term high vibration (up to 10g) and impact without deformation or failure.

3. Extreme Temperature Environments

Can work normally in extreme temperature ranges from -40℃ to 80℃. High-temperature resistant materials are used for components such as hydraulic motor seals (N154-74) and piston seals (N155-5), preventing performance degradation in high-temperature environments; low-temperature resistant materials ensure that parts like springs (N151-66) and hydraulic pipes (N15-20) do not become brittle or crack in cold environments (e.g., desert winters).

4. Complex Geological Drilling Conditions

Adapt to different geological conditions—including hard rock, soft soil, sandstone, coal seam, and salt rock. The precise control of shifting mechanisms (N151-61, N151-67) and stable power transmission of unit heads (N15-1) ensure smooth drilling even when facing varying drilling resistance. Backup tongs (N15-10) provide reliable clamping force to handle drill pipe movement in complex formations.

5. Industrial & Drilling Auxiliary Environments

Suitable for drilling auxiliary systems and industrial workshops where NJ200 series and SDPROS equipment are used. Components such as cabinets (N151-89), name plates (N15-8), and operation illustration plates (N151-16) are designed to be easy to read and maintain, even in busy workshop environments.

Maintenance & Care Suggestions

Proper maintenance and care are key to extending the service life of spare parts, reducing failure rates, and ensuring the stable operation of NJ200 series and SDPROS drilling machinery. Below are practical, easy-to-follow maintenance suggestions based on on-site experience and industry standards, tailored to our spare parts:

1. Daily Maintenance (Daily Inspection)

• Core Assemblies: Check the unit head (N15-1) for abnormal noise or vibration; inspect the backup tong (N15-10) for proper clamping force and oil leakage; ensure the integrated hydraulic pipe assembly (N15-20) has no leaks or loose fittings.

• Transmission & Gear Components: Check the idler gear (N151-35) for abnormal wear or noise; ensure the retainer ring (N151-36) is securely in place; clean the idler gear shaft sleeve (N151-39) to remove debris that could cause friction.

• Hydraulic System Components: Check the hydraulic motor (N154-74) for oil leakage and abnormal temperature; read the torque gauge (N154-1) to ensure hydraulic pressure is within the safe range (0-25MPa); inspect the oil cylinder (N155-1) for leaks.

• Small Components & Fasteners: Check hexagon head bolts (N15-22) and other fasteners for tightness; ensure name plates (N15-8) and operation illustration plates (N151-16) are clean and legible.

2. Regular Maintenance (Weekly/Monthly/Quarterly)

• Lubrication: Every week, add API GL-4 standard lubricating oil (or grease) to idler gears (N151-35), walking gears (N154-21), and guide rail roller assemblies (N15-14) to ensure smooth operation and reduce wear. Lubricate shifting mechanisms (N151-61, N151-67) every two weeks.

• Wear Inspection: Every month, inspect the wear condition of idler gears (N151-35), piston seals (N155-5), and brake components (N151-103). Replace parts if wear exceeds the limit (e.g., gear tooth wear more than 0.5mm, seal damage).

• Hydraulic System Maintenance: Every month, check the hydraulic oil level and quality; replace hydraulic oil every 6 months (or 2000 operating hours) to prevent oil contamination. Clean the torque gauge (N154-1) and its connector (N154-2) to ensure accurate readings.

• Anti-Corrosion Maintenance: Every quarter, inspect the anti-corrosion coating of hydraulic pipes (N15-20), unit head shells (N151-1), and idler gears (N151-35). Reapply anti-corrosion coating if the coating is damaged or worn to prevent rust and corrosion.

3. Long-Term Storage Maintenance

• Store spare parts in a dry, ventilated, and clean warehouse, away from moisture, dust, and corrosive media (such as drilling fluid, acid, alkali). Keep the warehouse temperature between 5℃ and 30℃ to avoid extreme temperature damage.

• Coat metal parts (idler gears, bolts, oil cylinders) with anti-rust oil before storage; wrap hydraulic components (hydraulic motors, pipes) and electrical parts with waterproof and dustproof materials to prevent damage.

• Regularly inspect stored spare parts every 3 months, clean and reapply anti-rust oil if necessary, and ensure that all parts are in good condition and ready for use at any time.

4. Maintenance Notes

• Maintenance personnel must receive professional training, be familiar with the structure and function of NJ200 series and SDPROS equipment, and strictly follow the maintenance procedures to avoid improper operation causing damage to parts or equipment.

• Use special tools and matching auxiliary materials (lubricating oil, seals) during maintenance. Do not use inferior or incompatible materials, as this could reduce the service life of parts or cause system failure.

• Record maintenance details (time, content, replaced parts) in a log to establish a maintenance file. This helps track the use and maintenance status of parts, optimize maintenance schedules, and quickly identify potential problems.

• When replacing spare parts, ensure the new part matches the original equipment model (e.g., NJ200-01, NJ200-07) and check the part’s quality (surface condition, dimensional accuracy) before installation.

We supply the following spare parts:

N151-36 NJ200-01.22 Retainer ring

N151-39 NJ200-01.24 Idler gear shaft sleeve

N15-1 NJ200-01.00 Unit head

N15-20 NJ200-07.02.00 Integrated hydraulic pipe assembly

N15-10 NJ200-02.00 Backup tong

N15-12 NJ200-03.00 Support bracket

N15-14 NJ200-06.00 Guide rail roller assembly

N15-21 Bottom seat assembly

N151-101 Shell and accessory

N151-102 Tong head assembly

N151-103 Braking assembly

N151-61 NJ200-01.39.00 Gear shifting mechanism assembly

N151-67 NJ200-07.42.00 Gear shifting mechanism assembly

N151-104 Transmission mechanism

N151-25 NJ200-01.15 Unit head cover

N151-1 NJ200-01.01 Unit head shell

N151-91 NJ200-01.50 Unit head cover

N151-99 NJ200-01.55 Position block

N151-105 XYQI2.Z-44 Baffle

N151-89 NJ200-01.48 Cabinet

N151-82 NJ200-01.45 End cover

N151-62 XYQ12.Z-60 Position block

N151-66 XYQ3C.Z-21 Spring

N151-65 XYQ12.Z-21 Position block

NI51-12 NJ200-01.08 End cover

N151-15 NJ200-0I.09 Baffle

N151-50 NJ2OO-O1.3O End cover of main shaft

N151-40 NJ200-01.25 End cover

N151-16 NJ200-12A Operation illustration plate

N15-19 NJ200-08 Plane plate

N15-6 NJ200-14 Retainer plate

N15-8 NJ200-11A Name plate

N15-4 NJ200-10 Unit head seat

N15-15 NJ200-04 Guide rail

N15-17 NJ200-05 Rack

N15-22 NJ200-04-1 Hexagon head bolt

N154-53 NJ200-02.22 Support plate

N154-1 Torque gauge Y-60(0-25MPa)

N154-2 NJ200-02.01 Torque gauge connector

N154-I4 NJ200-02.il Connection adapter

N154-I3 NJ200-02.09 Hollow bolt

N155-1 NJ200-02.08.01 Oil cylinder main body

N155-5 NJ200-02.0&02 Piston

N155-6 NJ200-02.08.03 Piston gland

N154-60 NJ200-07.03 Connection adapter

N154-20 NJ200-02.13 Flat key

N154-74 Hydraulic motor JH-100

N154-16 NJ200-02.12 Walking motor seat

N154-21 NJ200-02.14 Walking gear

N151-35 NJ200-01.21 Idler gear

N151-36 NJ200-01.22 Retainer ring

N151-39 NJ200-01.24 Idler gear shaft sleeve

N15-1 NJ200-01.00 Unit head

N15-20 NJ200-07.02.00 Integrated hydraulic pipe assembly

N15-10 NJ200-02.00 Backup tong

N15-12 NJ200-03.00 Support bracket

N15-14 NJ200-06.00 Guide rail roller assembly

N15-21 Bottom seat assembly

N151-101 Shell and accessory

N151-102 Tong head assembly

N151-103 Braking assembly

N151-61 NJ200-01.39.00 Gear shifting mechanism assembly

N151-67 NJ200-07.42.00 Gear shifting mechanism assembly

N151-104 Transmission mechanism

N151-25 NJ200-01.15 Unit head cover

N151-1 NJ200-01.01 Unit head shell

N151-91 NJ200-01.50 Unit head cover

N151-99 NJ200-01.55 Position block

N151-105 XYQI2.Z-44 Baffle

N151-89 NJ200-01.48 Cabinet

N151-82 NJ200-01.45 End cover

N151-62 XYQ12.Z-60 Position block

N151-66 XYQ3C.Z-21 Spring

N151-65 XYQ12.Z-21 Position block

NI51-12 NJ200-01.08 End cover

N151-15 NJ200-0I.09 Baffle

N151-50 NJ2OO-O1.3O End cover of main shaft

N151-40 NJ200-01.25 End cover

N151-16 NJ200-12A Operation illustration plate

N15-19 NJ200-08 Plane plate

N15-6 NJ200-14 Retainer plate

N15-8 NJ200-11A Name plate

N15-4 NJ200-10 Unit head seat

N15-15 NJ200-04 Guide rail

N15-17 NJ200-05 Rack

N15-22 NJ200-04-1 Hexagon head bolt

N154-53 NJ200-02.22 Support plate

N154-1 Torque gauge Y-60(0-25MPa)

N154-2 NJ200-02.01 Torque gauge connector

N154-I4 NJ200-02.il Connection adapter

N154-I3 NJ200-02.09 Hollow bolt

N155-1 NJ200-02.08.01 Oil cylinder main body

N155-5 NJ200-02.0&02 Piston

N155-6 NJ200-02.08.03 Piston gland

N154-60 NJ200-07.03 Connection adapter

N154-20 NJ200-02.13 Flat key

N154-74 Hydraulic motor JH-100

N154-16 NJ200-02.12 Walking motor seat

N154-21 NJ200-02.14 Walking gear

On-Site Fault Maintenance Cases

Below are 4 real on-site fault maintenance cases from our oilfield customers, detailing common faults of NJ200 series and SDPROS-compatible equipment, their causes, and solutions using our spare parts. These cases help you quickly identify and resolve similar problems, reduce downtime, and improve maintenance efficiency:

Case 1: Idler Gear Wear Causing Transmission Noise

Site: An onshore oilfield drilling platform, using NJ200-01 series machinery with SDPROS equipment.

Fault Phenomenon: The unit head (N15-1) made loud abnormal noise during operation, and the transmission system vibrated excessively. Over time, the noise intensified, affecting drilling efficiency and posing a risk of component damage.

Cause Analysis: On-site inspection found that the N151-35 NJ200-01.21 Idler gear (SDPROS-compatible) was severely worn, with uneven tooth surface damage. This was caused by long-term high-load operation without regular lubrication, leading to poor gear meshing and abnormal noise.

Solution: Replace the worn idler gear with our new N151-35 NJ200-01.21 Idler gear. Clean the transmission system, add API GL-4 standard lubricating grease, and adjust the gear meshing gap. After replacement, the abnormal noise and vibration disappeared, and the transmission system operated smoothly. The drilling operation resumed within 1.5 hours.

Experience Summary: Regular lubrication of idler gears is critical to reducing wear. Follow the maintenance schedule to add lubricant every week, and inspect gear wear every month to avoid serious damage to the transmission system.

Case 2: Hydraulic Oil Leakage from Oil Cylinder

Site: A deep well drilling site, using NJ200-02 series drilling machinery.

Fault Phenomenon: The backup tong (N15-10) failed to clamp drill pipes tightly, and hydraulic oil leaked from the oil cylinder (N155-1). This caused reduced clamping force, posing a safety hazard and forcing the drilling operation to stop.

Cause Analysis: Disassembly inspection found that the N155-5 NJ200-02.08.02 Piston’s seal was damaged, and the N155-6 NJ200-02.08.03 Piston gland was loose. This caused hydraulic oil to leak from the oil cylinder, reducing system pressure and clamping force.

Solution: Replace the damaged piston seal and loose piston gland with our new N155-5 Piston and N155-6 Piston gland. Clean the oil cylinder (N155-1), refill the hydraulic system with clean oil, and test the backup tong’s clamping function. After replacement, the leakage was completely eliminated, and the backup tong provided stable clamping force. The drilling operation resumed within 2 hours.

Experience Summary: Regularly check hydraulic cylinders for oil leakage. Replace damaged seals and loose components in time to maintain system pressure and ensure the safe operation of backup tongs.

Case 3: Gear Shifting Mechanism Jamming

Site: An offshore drilling platform, using NJ200-07 series drilling machinery.

Fault Phenomenon: The N151-67 NJ200-07.42.00 Gear shifting mechanism assembly was stuck, and it was impossible to adjust the transmission speed. This made it difficult to adapt to changing drilling conditions, reducing drilling efficiency.

Cause Analysis: Inspection found that the shifting mechanism was contaminated with drilling fluid and dust, and the internal spring (N151-66) was worn and lost its elastic force. This caused the shifting fork to get stuck and unable to move normally.

Solution: Disassemble the shifting mechanism assembly (N151-67), clean all components to remove drilling fluid and dust, and replace the worn spring with our new N151-66 XYQ3C.Z-21 Spring. Reassemble the mechanism, add lubricating oil, and test the shifting function. After maintenance, the shifting mechanism operated smoothly, and speed adjustments could be made normally.

Experience Summary: Keep shifting mechanisms clean and free of contaminants. Regularly inspect and replace worn springs to ensure proper reset and smooth operation of the shifting mechanism.

Case 4: Unit Head Overheating & Abnormal Noise

Site: A drilling maintenance workshop, using NJ200-01 series unit head (N15-1).

Fault Phenomenon: The unit head (N15-1) overheated quickly during operation, made abnormal noise, and eventually shut down automatically. Inspection found that the internal idler gear shaft sleeve (N151-39) was worn and seized.

Cause Analysis: The idler gear shaft sleeve (N151-39) was not lubricated regularly, leading to excessive friction and wear. Over time, the sleeve seized, causing the idler gear (N151-35) to rotate abnormally, resulting in overheating and noise.

Solution: Replace the worn idler gear shaft sleeve with our new N151-39 NJ200-01.24 Idler gear shaft sleeve and inspect the idler gear (N151-35) for wear (no significant wear was found). Clean the unit head’s internal components, add lubricating grease, and test the unit head. After replacement, the unit head operated normally without overheating or noise.

Experience Summary: Regular lubrication of idler gear shaft sleeves is essential to prevent friction and seizure. Follow the weekly lubrication schedule to extend the service life of unit head components.

Procurement & Technical Reference Standards

1. Procurement Reference Standards

To help you purchase the right spare parts accurately and efficiently, we provide the following procurement reference standards, ensuring that the parts you buy are compatible with your NJ200 series and SDPROS equipment and meet industry quality requirements:

• Model Matching Standard: Confirm the original equipment model (e.g., NJ200-01, NJ200-07) and the part number of the spare part to be replaced (e.g., N151-35, N15-10). Our parts are 100% compatible with the original model, and we conduct 1:1 compatibility testing before delivery to ensure no installation issues.

• Quality Standard: All spare parts comply with API 7K (drilling equipment parts) and ISO 9001 quality management system standards. Each part undergoes strict quality inspection (dimensional accuracy, material composition, performance testing) before leaving the factory, with a complete quality inspection report provided upon request.

• Material Standard: Mechanical components are made of high-strength alloy steel (ASTM A105, AISI 4140) or stainless steel; hydraulic components use high-pressure resistant rubber and reinforced steel wire; structural components use corrosion-resistant materials. All materials meet industry standards for drilling equipment.

• Compatibility Verification: Before procurement, our professional technical team can help you verify the compatibility of spare parts with your equipment. Provide us with your equipment model or original part number, and we will confirm the matching part and provide detailed specifications and pictures for verification.

2. Technical Reference Standards

To help you solve technical problems during use and maintenance, we provide the following technical reference standards, based on years of on-site experience and NJ200 series equipment manufacturer requirements:

• Installation Standard: All parts are installed in accordance with the original NJ200 series and SDPROS equipment installation manual. We provide detailed installation steps and precautions for each part, and for complex components (e.g., unit heads, hydraulic motor assemblies), we can provide on-site technical guidance.

• Fault Diagnosis Standard: Refer to the on-site maintenance cases and FAQ in this document. Based on the fault phenomenon (e.g., leakage, abnormal noise, jamming), you can quickly identify the cause and take corresponding solutions. Our technical team is also available 24/7 to provide fault diagnosis support.

• Maintenance Standard: Follow the maintenance and care suggestions provided in this document, combined with your equipment’s operation frequency and working environment, to formulate a reasonable maintenance plan. Adhere to the "prevention first, maintenance combined" principle to extend the service life of parts and equipment.

• Technical Support: Our technical team has more than 10 years of experience in NJ200 series and SDPROS equipment maintenance. We provide 24/7 online technical consultation, on-site technical guidance, and maintenance training to help you improve maintenance efficiency and solve technical problems quickly.

FAQ (Frequently Asked Questions)

Procurement Guidance

As a professional supplier of NJ200 series and SDPROS-compatible drilling spare parts, we are committed to providing you with high-quality, compatible, and cost-effective products, along with comprehensive technical support and after-sales service. Our core mission is to support your drilling operations by ensuring you have access to reliable, readily available spare parts that minimize downtime, reduce maintenance costs, and maximize operational efficiency—all with a focus on meeting your procurement needs.

Our spare parts offer distinct advantages that set us apart: 100% compatibility with NJ200 series sub-models and SDPROS equipment, strict compliance with API 7K and ISO 9001 industry standards, premium materials and precision machining for durability, professional on-site and online technical support, and a reliable quality guarantee. We maintain a complete supply chain and sufficient inventory to quickly respond to your procurement needs—whether you require emergency replacement parts to resume critical operations or regular maintenance parts to keep your equipment running smoothly.

We understand that every drilling operation is unique, which is why we offer customized procurement solutions based on your equipment model, maintenance schedule, and budget. Whether you need a single critical part (such as the N151-35 Idler gear or N154-74 Hydraulic motor) or a bulk order of multiple components (bolts, springs, retainer rings), we can meet your requirements with competitive pricing and reliable service. Our team works closely with you to ensure you get the right parts, at the right time, to support your operational success.

If you need to purchase any of the spare parts mentioned in this document, or if you have questions about product compatibility, technical parameters, maintenance, or procurement, please contact us at any time. Our professional team will provide you with personalized services, help you select the most suitable spare parts, and solve your technical and procurement problems—supporting your drilling operations with reliable, high-quality spare part supply every step of the way.

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Emeil: [email protected]   whatsapp: +86 15275658619

Should you have any purchase intentions, please contact us – we will offer you our most favorable price.