Nov Varco TDS11SA TDS8SA Top Drive Main Shaft Dq500z - Honghua

• Customization: Available
• After-sales Service: 2 Year
• Warranty: 2 Year
• Model NO.: VSP
• Manufacturing Process: Stamping
• Surface Treatment: Galvanized
• Operation Pressure: Vacuum
• Material: Cast Steel
• Transport Package: Wooden Box
• Specification: 10*10*10
• Trademark: VSP
• Origin: China
• HS Code: 8431431000
• Production Capacity: 2000pieces / Year
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 32.000kg

Product Description

Detail Function:

1. Power Transmission and Rotational Drive;
Our Main Shaft seamlessly integrates with the faucet and drilling motor, delivering robust power transmission to the drill string and ensuring dynamic rotation of the drilling tool, which culminates in an efficient drilling operation. This innovative design surpasses traditional rotary drive methods by enabling a continuous rotation and casing operation, significantly enhancing drilling performance.
2. Drill String Connection and Load Support;
Expertly engineered, the Main Shaft is securely attached to the integral faucet via a gearbox housing, working in harmony with lifting rings and elevators to sustain the entire weight and dynamic load of the drill string during operations. It assures stability and precise alignment when connecting the column or flipping the eye, fortifying the overall structural integrity.
3. Automated Control and Parameter Monitoring;
Equipped with state-of-the-art technology, our top drive systems offer real-time monitoring of rotation angles, torque, and other critical parameters through advanced sensors. Harnessing AI algorithms, the system optimizes drilling control, exemplified by PetroChina's patented technology that leverages a distance measuring device to gather rotational data, delivering precise feedback for subterranean operations.
4. Risk Control and Security Assurance;
The Main Shaft's design strength and operational efficiency are pivotal for drilling safety. In the event of an obstruction, it adeptly adjusts its rotation direction or applies reverse torque, mitigating the risk of drilling tool jamming and safeguarding the entire operation with swift responsiveness.

Material and Manufacturing Standards of Top Drive Main Shaft

1. Material Requirements
Hydrogen Sulfide Resistant Alloy Steel
The Main Shaft is crafted from a specialized alloy steel engineered to resist hydrogen sulfide (H2S) corrosion, ensuring exceptional durability and longevity in sulfur-rich oil and gas well environments.
This material adheres to stringent low-temperature toughness metrics: with a yield strength of ≥ 310MPa, the impact absorption energy at -20 ºC is ≥ 32J for single values, and ≥ 42J on average; for a yield strength < 310MPa, single values must be ≥ 20J and averages ≥ 27J.
High Strength Alloy Steel
In non-corrosive settings, conventional carbon steels (like 50 C12, 50 C4) or alloy steels (nickel chromium, chromium vanadium) require mechanical property enhancement through processes such as hot rolling and cold drawing to meet performance standards.
2. Manufacturing Standards
Chinese National Standard (GB/T 31049-2022)
Mandates static load tensile testing for the top drive Main Shaft, with parameters tailored to various drilling depths (e.g., Main Shaft inner diameter ≥ 102mm at a 15,000-meter depth, maximum short-term torque ≥ 150kN·m).
New directives for direct drive top drives have been introduced, necessitating the elimination of mechanical transmission mechanisms when the Main Shaft is directly linked to the motor, thereby boosting transmission efficiency to an impressive 95%.
API Standard (API Spec 8C/8A)
The design of primary load-bearing components must be validated for high and low stress zones via finite element analysis, meeting safety factors required at PSL1 or PSL2 levels.
A comprehensive load verification test is essential (e.g., DQ70 top drive test load ≥ 9000kN). Selection and Certification

Land and marine drilling operations must comply with GB/T 31049 or API standards accordingly. Products with ISO 9001/API dual certification are poised to enter the global marketplace, demonstrating superior quality assurance.
The direct drive Main Shaft requires additional validation of the electromechanical integration reliability between the motor and the Main Shaft due to the elimination of the gearbox, ensuring seamless operation.

Comprehensive Guide to Maintenance for the Top Drive Main Shaft

1. Daily Maintenance: Ensure Optimal Performance Every Day
Cleaning and Lubrication: A Daily Ritual for Longevity
After each day's operation, diligently clean any mud and oil residues from the surface of the Main shaft. Use high-quality non-woven fabric to meticulously wipe crucial parts like taper joints, thus preventing any chemical corrosion and ensuring seamless performance.
Replenish the lubricating grease—such as premium lithium-based grease—as per the precise guidelines laid out by the manufacturer. Ensure that the oil injection cycle for the main shaft bearings never exceeds 200 hours. The injection amount must be accurately managed to prevent any contamination, keeping the machinery in pristine condition.
Inspection of Fasteners: A Crucial Task
Conduct regular inspections of the pre-tightening force on the main shaft connecting bolts, such as lifting ring screws and coupling bolts. Ensure that the torque strictly adheres to the technical manual standards. For example, the DQ70BS top drive mandates a bolt torque of no less than 1200N · m.

2. Regular Maintenance: Ensuring Longevity and Efficiency
Testing of Bearings and Seals: Vigilance for Sustained Operation
Every 500 hours, disassemble the Main shaft bearing to scrutinize its wear. Utilize a micrometer to measure the radial clearance, and replace it if it surpasses 0.05mm, ensuring continued efficiency and reliability.
Replace seals, such as O-rings, every quarter. Prioritize the use of durable fluororubber materials to combat hydrogen sulfide corrosion, thereby extending the lifespan of your equipment.
Maintenance of the Conical Interface: Precision and Care
Monthly inspections of the Main shaft cone mouth are vital. If the tool holder contact rate dips below 75%, it is essential to grind and repair it to avert excessive jumping caused by the 'horn mouth', safeguarding the machinery's precision.

3. Fault Prevention and Handling: Proactive Measures
Monitoring Vibration and Temperature: A Preemptive Strategy
Install advanced vibration sensors for real-time monitoring of any unusual Main shaft vibrations, maintaining a threshold of ≤ 2.5mm/s. Should the temperature rise exceed 60 ºC, halt operations immediately to diagnose and rectify lubrication or bearing issues, preserving the equipment's integrity.