N154-66 XYQI2.YD-02.07 Valve bonnet

Introduction

In the oil and gas drilling industry, the reliability of drilling equipment directly impacts operational safety, project efficiency, and overall profitability. The NJ200 series drilling machinery, widely used in onshore and offshore drilling operations, relies on high-performance, perfectly matched spare parts to maintain continuous operation. Unexpected failures caused by worn, low-quality, or incompatible spare parts—such as stuck valves, faulty transmission components, or brake system malfunctions—often result in costly downtime, safety risks for on-site personnel, and delays in drilling schedules. These are the key pain points faced by drilling contractors, oilfield maintenance teams, equipment service providers, and project managers worldwide.

Our supply of drilling spare parts is specifically engineered to address these challenges, focusing on the full range of components for NJ200 series drilling machinery, including adapters, valves, planetary system parts, brake components, shifting mechanisms, and hydraulic accessories. We also provide specialized parts such as the N154-66 XYQI2.YD-02.07 Valve bonnet (compatible withSDPROSPERITY equipment) and seamless steel pipes, all manufactured to meet or exceed original equipment specifications. Adhering to authoritative industry standards such as API (American Petroleum Institute) 7K and ISO 9001 quality management system, our products ensure compatibility, durability, and long service life. This document provides comprehensive product details, practical technical guidance, real on-site maintenance cases, and procurement guidelines to help you select the right spare parts, resolve technical issues efficiently, and keep your NJ200 series equipment running smoothly—all with the goal of supporting your operational success through reliable spare part supply.

Core Purpose & Target User Needs

Core Purpose

The core purpose of our supplied spare parts is to provide direct, high-reliability replacements for NJ200 series drilling machinery (including NJ200-01, NJ200-07, NJ200-13 series sub-models) and compatible equipment such asSDPROSPERITY systems. Each part—from the N154-62 NJ200-I3.02 Adapter to the N151-32 NJ200-01.19 Planetary gear, and the N154-66 Valve bonnet—is precision-manufactured to match the original equipment’s dimensional specifications, material standards, and performance requirements. Our goal is to minimize equipment downtime, reduce maintenance costs, ensure operational safety, extend the service life of your NJ200 series machinery, and support seamless drilling operations through readily available, high-quality spare parts.

Target User Segmentation & Needs

• Oilfield Drilling Contractors: Need durable, compatible spare parts for NJ200 series drilling machinery to avoid unplanned downtime during high-intensity drilling operations. Key needs include quick access to critical components (e.g., planetary gears, brake discs, valve cores), professional technical guidance to resolve on-site faults, and cost-effective solutions that balance quality and budget.

• On-Site Maintenance Teams: Require easy-to-install, reliable spare parts that eliminate the need for equipment modifications. They need clear maintenance guidelines, fault diagnosis support, and parts that can withstand harsh drilling environments—such as corrosion-resistant seamless steel pipes and wear-resistant brake components.

• Drilling Equipment Service Providers: Need a comprehensive range of NJ200 series spare parts (from small rollers and springs to large unit head main bodies) to serve multiple client needs. They prioritize product quality, compatibility, and timely supply to improve service efficiency and client satisfaction.

• Equipment Asset Managers: Focus on extending the service life of NJ200 series machinery and 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.

• AMLPP/TEDA Equipment Operators: Require specialized parts like the N154-66 XYQI2.YD-02.07 Valve bonnet that are compatible with their equipment, ensuring seamless integration and stable performance to avoid safety hazards associated with valve malfunctions.

Product Introduction

We specialize in supplying a full range of high-quality spare parts exclusively for NJ200 series drilling machinery and compatible systems (AMLPP, TEDA). All products are manufactured using premium materials, advanced 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. Below is a detailed breakdown of our key product categories and their critical models:

1. Valve & Hydraulic Accessories

This category includes core components for controlling fluid flow in drilling hydraulic systems, ensuring precise operation of valves and stable performance of hydraulic circuits—critical for safe and efficient drilling. Key models include:

• N154-66 XYQI2.YD-02.07 Valve bonnet: Compatible withSDPROSPERITY equipment, this valve bonnet provides a secure seal for valve assemblies, preventing fluid leakage and protecting internal components from dust, drilling fluid, and other contaminants. It is manufactured to withstand high pressure and corrosive environments.

• N154-67 NJ200-13.03 Valve core: A key component of NJ200-13 series valves, responsible for regulating fluid flow and pressure in hydraulic systems. It features precise machining to ensure smooth operation and tight sealing, reducing the risk of valve jamming or leakage.

• N151-108 Hose 10II-550 (M 18 ball/M 18x 1.5): A high-pressure hydraulic hose designed for NJ200 series machinery, used to transmit hydraulic oil between components. It features a durable outer layer and leak-proof connections, suitable for high-pressure hydraulic circuits in drilling operations.

• N151-116 NJ200-07.02.04 Liquid road integrated plate: Integrates multiple hydraulic channels, simplifying the hydraulic system structure of NJ200-07 series equipment and ensuring smooth fluid flow, reducing pressure loss and improving system efficiency.

2. Adapters & Connecting Components

These parts are essential for connecting different components of NJ200 series drilling machinery, ensuring tight, stable connections that withstand vibration and high loads during drilling. Key models include:

• N154-62 NJ200-I3.02 Adapter & N154-63 NJ200-13.01 Adapter: Specifically designed for NJ200-13 series machinery, these adapters connect hydraulic, mechanical, or electrical components, ensuring perfect alignment and compatibility. They are made of high-strength steel to resist deformation and wear.

• N154-15 Seamless steel pipe (I)6xl (L=500): A corrosion-resistant seamless steel pipe used for fluid or gas transmission in NJ200 series equipment. Its seamless design eliminates leakage points, and its compact size makes it suitable for installation in narrow spaces on drilling platforms.

• N151-109 NJ200-07.02.05 Hollow bolt: Used to connect hydraulic hoses or fluid channels in NJ200-07 series machinery, featuring a hollow design for fluid transmission and a secure thread connection to prevent leakage under high pressure.

3. Planetary System Components

The planetary system is the core power transmission component of NJ200 series drilling machinery, and our spare parts ensure stable power output and efficient energy transmission. Key models include:

• N151-32 NJ200-01.19 Planetary gear: A critical component of the NJ200-01 series planetary transmission system, responsible for transmitting power and adjusting speed. It is made of high-strength alloy steel with heat treatment to improve hardness and wear resistance.

• N151-93 NJ200-01.52 Planetary connection board & N151-30 NJ200-01.17 Planetary connection board: Connect planetary gears to the main transmission shaft, ensuring uniform force distribution and stable power transmission. They feature precise hole positioning for perfect alignment with other components.

• N151-31 NJ200-01.18 Outer spline sleeve: Transmits power between the planetary system and other components, featuring a spline design for tight engagement and smooth power transmission, reducing wear and noise.

4. Brake System Components

Brake systems are critical for drilling safety, and our spare parts ensure reliable braking performance to prevent accidents during drilling, tripping, and well completion operations. Key models include:

• N151-22 NJ200-01.14 Brake disc & N151-20 NJ200-01.12 Brake friction disc: Core components of NJ200-01 series brake systems. The brake disc withstands high temperatures and pressure, while the friction disc provides strong braking force and wear resistance, ensuring reliable stopping performance.

• N151-19 NJ200-01.il Brake steel plate: Supports the brake friction disc, providing structural strength and stability during braking. It is made of high-strength steel to resist deformation under high pressure.

• N151-17 NJ200-01.10 Brake spline sleeve: Connects the brake system to the transmission shaft, ensuring precise brake control and smooth engagement/disengagement, reducing brake noise and wear.

5. Shifting & Transmission Components

These components control the speed and direction of NJ200 series drilling machinery, ensuring smooth shifting and stable transmission. Key models include:

• N153-1 NJ200-01.42.01 Shifting fork & N152-1 NJ200-01.39.01 Shifting fork: Control the movement of gears in the transmission system, enabling smooth speed changes. They are made of wear-resistant materials to extend service life.

• N153-7 NJ200-01.42.02 Shifting fork shaft & N152-7 NJ200-01.39.02 Shifting fork shaft: Guide the movement of shifting forks, ensuring precise positioning and smooth operation. They feature a polished surface to reduce friction.

• N153-8 XYQ12.Z-19.01 Shaft sleeve & N152-8 XYQ12.Z-19.01 Shaft sleeve: Protect transmission shafts from wear and misalignment, ensuring stable power transmission. They are designed to fit tightly with shafts and other components.

6. Small Components & Accessories

These small but critical parts ensure the overall performance and reliability of NJ200 series machinery, with models including:

• N151-27 Roller 010×24.8, N153-2 XYQ3C.Z.6-3 Roller, N152-2 XYQ3C.Z.6-3 Roller: Reduce friction between moving components, ensuring smooth operation and extending service life.

• N151-23 XYQ3C.Z-21 Spring: Provides elastic force for brake systems, valves, and other components, ensuring proper reset and stable performance.

• N151-106 Steel wire 2×970: Used for tensioning or connecting components in NJ200 series machinery, featuring high tensile strength and corrosion resistance.

Function Description

1. Valve & Hydraulic Accessories Functions

• Fluid Control: Valve cores (N154-67) and valve bonnets (N154-66) regulate the flow rate and pressure of hydraulic oil or other fluids in the system, ensuring precise operation of hydraulic components such as cylinders and motors.

• Leakage Prevention: Valve bonnets, hydraulic hoses (N151-108), and hollow bolts (N151-109) provide tight seals, preventing fluid leakage that could lead to system failure or reduced efficiency.

• System Integration: The liquid road integrated plate (N151-116) integrates multiple hydraulic channels, simplifying the system structure, reducing pressure loss, and improving the overall efficiency of the hydraulic system.

2. Adapters & Connecting Components Functions

• Component Connection: Adapters (N154-62, N154-63) connect different types of components (hydraulic, mechanical) in NJ200 series machinery, ensuring perfect alignment and stable power/fluid transmission.

• Fluid/Gas Transmission: Seamless steel pipes (N154-15) transmit hydraulic oil, drilling fluid, or gas between components, with a seamless design that eliminates leakage points and resists corrosion.

• Structural Support: Connecting components provide structural stability, withstanding vibration, high loads, and harsh environmental conditions during drilling operations.

3. Planetary System Components Functions

• Power Transmission: Planetary gears (N151-32), outer spline sleeves (N151-31), and connection boards (N151-93, N151-30) transmit power from the main engine to the drilling bit or other working components, ensuring stable and efficient power output.

• Speed Adjustment: Planetary gears adjust the speed of the transmission system, adapting to different drilling depths and geological conditions, ensuring smooth drilling operations.

• Force Distribution: Connection boards distribute power evenly across planetary gears, reducing wear and extending the service life of the entire planetary system.

4. Brake System Components Functions

• Safe Braking: Brake discs (N151-22), friction discs (N151-20), and brake steel plates (N151-19) provide strong braking force, stopping the rotation of the drill pipe or transmission system quickly and reliably, preventing accidents.

• Brake Control: Brake spline sleeves (N151-17) ensure precise control of the brake system, enabling smooth engagement and disengagement, reducing wear and noise.

• Heat Dissipation: Brake discs are designed to dissipate heat quickly, preventing overheating during prolonged braking, which could lead to brake failure.

5. Shifting & Transmission Components Functions

• Speed Shifting: Shifting forks (N153-1, N152-1) and shifting fork shafts (N153-7, N152-7) control the movement of gears, enabling smooth speed changes to adapt to different drilling conditions.

• Power Transmission: Shaft sleeves (N153-8, N152-8) protect transmission shafts and ensure tight engagement between components, facilitating stable power transmission.

• Precise Positioning: Shifting components ensure precise positioning of gears, reducing gear wear and preventing gear jamming.

6. Small Components & Accessories Functions

• Friction Reduction: Rollers (N151-27, N153-2, N152-2) reduce friction between moving components, ensuring smooth operation and extending service life.

• Elastic Reset: Springs (N151-23) provide elastic force for components such as brakes and valves, ensuring proper reset and stable performance.

• Tensioning & Connection: Steel wires (N151-106) provide tension or connect small components, ensuring the overall stability of the equipment.

Structural Features

1. General Structural Features (All Product Categories)

• High 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 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 planetary gears, brake discs, and shifting forks 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.

2. Category-Specific Structural Features

• Valve & Hydraulic Accessories: Valve bonnets (N154-66) feature a sealed design with high-temperature resistant gaskets to prevent fluid leakage; hydraulic hoses (N151-108) have a reinforced outer layer and leak-proof thread connections, suitable for high-pressure environments (up to 35MPa).

• Adapters & Connecting Components: Adapters (N154-62, N154-63) have precise thread designs for tight connection, with anti-loosening structures to prevent disconnection due to vibration; seamless steel pipes (N154-15) have a smooth inner wall to reduce fluid resistance and prevent scaling.

• Planetary System Components: Planetary gears (N151-32) have a precision tooth profile design for smooth meshing and low noise; connection boards (N151-93, N151-30) have reinforced structures to withstand high torque and uniform force distribution.

• Brake System Components: Brake discs (N151-22) have a heat-dissipating structure (cooling grooves) to reduce overheating; friction discs (N151-20) use high-temperature resistant friction materials to ensure stable braking performance even at high temperatures.

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 in the following scenarios:

1. Onshore & Offshore Drilling Platforms

Suitable for both onshore (desert, grassland, mountain) 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, seamless steel pipes (N154-15) and valve bonnets (N154-66) 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 (deep well, ultra-deep well, horizontal well drilling). Components such as planetary gears (N151-32), brake discs (N151-22), and shifting forks (N153-1) 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 valve cores (N154-67) and brake friction discs (N151-20), preventing performance degradation in high-temperature environments; low-temperature resistant materials ensure that parts like springs (N151-23) and hoses (N151-108) do not become brittle or crack in cold environments.

4. Complex Geological Drilling Conditions

Adapt to different geological conditions (hard rock, soft soil, sandstone, coal seam). The precise control of valve components (N154-66, N154-67) and stable power transmission of planetary system parts ensure smooth drilling even when facing varying drilling resistance. Brake components provide reliable safety protection during sudden changes in drilling load.

5. AMLPP/TEDA Equipment Operations

Specialized parts such as the N154-66 XYQI2.YD-02.07 Valve bonnet are compatible withSDPROSPERITY equipment, suitable for their specific working environments (industrial workshops, drilling auxiliary systems) and ensuring seamless integration and stable performance.

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 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)

• Valve & Hydraulic Accessories: Check for fluid leakage around valve bonnets (N154-66), hoses (N151-108), and hollow bolts (N151-109); ensure valve handles (N154-68) are flexible and not stuck; clean the surface of hydraulic components to remove dust and drilling fluid.

• Mechanical Components: Check the tightness of adapters (N154-62, N154-63), bolts, and other connecting parts; observe for abnormal noise or vibration in planetary gears (N151-32) and shifting components; clean rollers (N151-27) and shafts to remove debris that could cause friction.

• Brake System: Check the wear condition of brake friction discs (N151-20); ensure brake discs (N151-22) are clean and free of oil stains (which could reduce braking force); test the brake response to ensure it is sensitive and reliable.

2. Regular Maintenance (Weekly/Monthly/Quarterly)

• Lubrication: Add suitable lubricating oil (or grease) to planetary gears (N151-32), outer spline sleeves (N151-31), shifting fork shafts (N153-7, N152-7), and rollers (N151-27) every week. Use lubricants that comply with API GL-4 standards to ensure smooth operation and reduce wear.

• Wear Inspection: Every month, check the wear condition of brake friction discs (N151-20), planetary gears (N151-32), and shifting forks (N153-1). Replace parts if wear exceeds the limit (e.g., friction disc thickness less than 3mm).

• Anti-Corrosion Maintenance: Every quarter, inspect the anti-corrosion coating of seamless steel pipes (N154-15), valve bonnets (N154-66), and other metal parts. Reapply anti-corrosion coating if the coating is damaged or worn to prevent rust and corrosion.

• Hydraulic System Check: Every month, check the pressure of the hydraulic system and the condition of hydraulic hoses (N151-108). Replace hoses that show signs of cracking, aging, or bulging to prevent leakage.

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 (adapters, planetary gears, bolts) with anti-rust oil before storage; wrap hydraulic hoses (N151-108) and valve components (N154-66, N154-67) 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 equipment and our spare parts, 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, sealing rings) 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, NJ200-13) and check the part’s quality (surface condition, dimensional accuracy) before installation.

We supply the following spare parts:

N154-62 NJ200-I3.02 Adapter

N154-15 Seamless steel pipe(I)6xl (L=500)

N154-63 NJ200-13.01 Adapter

N154-66 XYQI2.YD-02.07 Valve bonnet

N154-67 NJ200-13.03 Valve core

N154-68 XYQ12.YD-02.08 Hand shank

N151-92 NJ200-01.5I Baffle

N151-96 NJ200-01.54 Unit head main body

N151-93 NJ200-01.52 Planetary connection board

N151-28.1 NJ200-01.16 Rotation shaft

N151-28.2 NJ200-01.16 Rotation shaft

N151-31 NJ200-01.18 Outer spline sleeve

N151-32 NJ200-01.19 Planetary gear

N151-30 NJ200-01.17 Planetary connection board

N151-33 NJ200-01.20 Unit head large gear

N151-5 NJ200-01.05A Planetary claw

N151-8 NJ200-01.07B Planetary claw retainer block

N151-6 NJ200-01.06A Die

N151-4 NJ200-01.04A Die

N151-2 NJ200-01.02A Die

N151-27 Roller 010×24.8

N151-106 Steel wire 2×970

N151-23 XYQ3C.Z-21 Spring

N151-22 NJ200-01.14 Brake disc

N151-20 NJ200-01.12 Brake friction disc

N151-19 NJ200-01.il Brake steel plate

N151-25 NJ200-01.15 Unit head cover

N151-17 NJ200-01.10 Brake spline sleeve

N151-102 Tong head assembly

N153-9 NJ200-01.42.03 Shifting ring

N153-1 NJ200-01.42.01 Shifting fork

N153-8 XYQ12.Z-19.01 Shaft sleeve

N153-7 NJ200-01.42.02 Shifting fork shaft

N153-5 XYQ3C.Z.6-5 Roller seat

N153-2 XYQ3C.Z.6-3 Roller

N153-3 XYQ3C.Z.6-4 Roller shaft

N152-13 XYQ12.Z-19.04 Bolt shaft

N152-1 NJ200-01.39.01 Shifting fork

N152-8 XYQ12.Z-19.01 Shaft sleeve

N152-3 XYQ3C.Z.6-4 Roller shaft

N152-2 XYQ3C.Z.6-3 Roller

N152-5 XYQ3C.Z.6-5 Roller seat

N152-7 NJ200-01.39.02 Shifting fork shaft

N152-14 XYQ3C.Z.5-10 Ball handle

N151-107 XYQ3C.B-21 Oil passage bolt

N151-108 Hose 10II-550(M 18 ball/M 18x 1.5)

N151-109 NJ200-07.02.05 Hollow bolt

N151-113 NJ200-07.02.06 Handle

N151-116 NJ200-07.02.04 Liquid road integrated plate

N151-118 NJ200-07.02.07 Throttle valve core

On-Site Fault Maintenance Cases

Below are 4 real on-site fault maintenance cases from our oilfield customers, detailing common faults of NJ200 series drilling machinery, 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: Valve Leakage in Hydraulic System

Site: An onshore oilfield drilling platform, using NJ200-13 series drilling machinery withSDPROSPERITYequipment.

Fault Phenomenon: The hydraulic system of the drilling machinery had serious fluid leakage, leading to reduced system pressure and failure of the hydraulic cylinder to operate normally. The drilling operation was forced to stop.

Cause Analysis: On-site inspection found that the N154-66 XYQI2.YD-02.07 Valve bonnet was worn and deformed, and the internal seal was damaged. This caused hydraulic oil to leak from the valve assembly, reducing system pressure.

Solution: Replace the worn valve bonnet with our new N154-66 XYQI2.YD-02.07 Valve bonnet (compatible withSDPROSPERITYand NJ200-13 equipment). Clean the valve assembly, replace the seal, and refill the hydraulic system with oil. After replacement, the leakage was completely eliminated, system pressure returned to normal, and the hydraulic cylinder operated smoothly. The drilling operation resumed within 2 hours.

Experience Summary: Regularly check the condition of valve bonnets and seals in hydraulic systems. Replace worn or damaged parts in time to avoid hydraulic leakage and system failure. It is recommended to inspect valve components every month.

Case 2: Planetary Gear Wear Leading to Power Transmission Failure

Site: A deep well drilling site, using NJ200-01 series drilling machinery.

Fault Phenomenon: The planetary transmission system made abnormal noise, and the drilling bit rotated unevenly with insufficient power. Over time, the noise intensified, and the transmission system eventually failed.

Cause Analysis: Disassembly inspection found that the N151-32 NJ200-01.19 Planetary gear was severely worn, with tooth surface damage and uneven wear. This was caused by long-term high-load operation without regular lubrication.

Solution: Replace the worn planetary gear with our new N151-32 NJ200-01.19 Planetary gear. Clean the planetary system, add API GL-4 standard lubricating grease, and adjust the meshing gap between gears. After replacement, the abnormal noise disappeared, the transmission system operated smoothly, and the drilling bit had sufficient power. The machinery returned to normal operation.

Experience Summary: Regular lubrication of planetary gears is critical to reducing wear. Follow the maintenance schedule to add lubricant every week, and inspect gear wear every month. Replace worn gears before they cause serious damage to the entire transmission system.

Case 3: Brake System Failure

Site: An offshore drilling platform, using NJ200-01 series drilling machinery.

Fault Phenomenon: The brake system of the drilling machinery was insensitive, and the drill pipe could not be stopped quickly during tripping operations, posing a serious safety hazard.

Cause Analysis: Inspection found that the N151-20 NJ200-01.12 Brake friction disc was severely worn (thickness less than 2mm) and contaminated with oil stains. The brake disc (N151-22) also had slight deformation, reducing braking force.

Solution: Replace the worn brake friction disc with our new N151-20 NJ200-01.12 Brake friction disc, and repair the deformed brake disc (N151-22) by grinding. Clean the brake system to remove oil stains, adjust the brake clearance, and test the brake function. After maintenance, the brake system was sensitive and reliable, and the safety hazard was eliminated.

Experience Summary: Regularly check the wear condition of brake friction discs and keep the brake system clean. Replace friction discs when wear exceeds the limit, and avoid oil contamination of brake components, which can reduce braking performance.

Case 4: Shifting Fork Jamming

Site: A drilling maintenance workshop, NJ200-01 series drilling machinery.

Fault Phenomenon: The shifting mechanism of the drilling machinery was stuck, and it was impossible to change the speed of the transmission system, affecting drilling efficiency.

Cause Analysis: Inspection found that the N153-1 NJ200-01.42.01 Shifting fork was worn and deformed, and the shifting fork shaft (N153-7) was rusted due to moisture. This caused the shifting fork to get stuck and unable to move normally.

Solution: Replace the worn shifting fork with our new N153-1 NJ200-01.42.01 Shifting fork and the rusted shifting fork shaft with a new N153-7 NJ200-01.42.02 Shifting fork shaft. Clean the shifting mechanism, add lubricating oil, and test the shifting function. After replacement, the shifting mechanism operated smoothly, and speed changes could be made normally.

Experience Summary: Keep the shifting mechanism clean and dry, and add lubricating oil regularly to prevent rust and wear. Inspect shifting components every month, especially in humid environments, to avoid jamming faults.

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 machinery and meet industry quality requirements:

• Model Matching Standard: Confirm the original equipment model (e.g., NJ200-01, NJ200-07, NJ200-13) and the part number of the spare part to be replaced (e.g., N154-66, N151-32). 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 hoses use high-pressure resistant rubber and reinforced steel wire; valve 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 equipment installation manual. We provide detailed installation steps and precautions for each part, and for complex components (e.g., planetary gears, valve 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 drilling machinery 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 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 goal is to support your drilling operations by ensuring you have access to reliable, readily available spare parts that minimize downtime and reduce maintenance costs.

We can also provide customized procurement solutions based on your equipment model, maintenance schedule, and budget, helping you optimize your spare part inventory and reduce procurement costs. Whether you need a single part (such as the N154-66 Valve bonnet or N151-32 Planetary gear) or a bulk order of multiple components, we can meet your requirements with competitive pricing and reliable service.

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 operational success with reliable spare part supply.

contact us ：

Emeil: [email protected]   whatsapp: +86 15275658619

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