Premium Nov Varco TDS11SA TDS8SA Top Drive Main Shaft by Vsp

• 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;
The Premium Nov Varco TDS11SA TDS8SA Top Drive Main Shaft by VSP is a marvel in power transmission. Ingeniously connected directly to the faucet and drilling motor, it empowers the drill string by transmitting robust power, driving the drilling tool into seamless rotation for efficient drilling operations. Unlike traditional rotary methods, this Main Shaft offers continuous rotation and casing operations, significantly boosting drilling efficiency.
2. Drill String Connection and Load Support;
Expertly designed, the Main Shaft is integrated with the faucet via a robust gearbox housing. Collaborating with lifting rings and elevators, it supports the entire weight of the drill string and manages dynamic loads during operations. Whether connecting columns or flipping the eye, the Main Shaft guarantees stability and precise alignment, ensuring flawless drill string operations.
3. Automated Control and Parameter Monitoring;
Modern top drive systems, like those in the Premium Nov Varco series, feature real-time monitoring of rotation angles, torque, and other crucial parameters through state-of-the-art sensors. Enhanced with AI algorithms, these systems optimize drilling control. PetroChina's patented technology, for instance, employs a distance measuring device to gather Main Shaft rotation data, delivering precise feedback crucial for underground operations.
4. Risk Control and Security Assurance;
The exceptional design strength and execution efficiency of the Main Shaft are paramount for drilling safety. In scenarios of obstruction or jamming, the Main Shaft showcases its prowess by swiftly adjusting rotation direction or applying reverse torque, thus mitigating the risk of drilling tool jams and ensuring smooth operations.

Material and Manufacturing Standards of Top Drive Main Shaft

1. Material Requirements
Hydrogen Sulfide Resistant Alloy Steel
Crafted to perfection, the Main Shaft is constructed from special alloy steel that withstands hydrogen sulfide (H2S) corrosion, guaranteeing durability in sulfur-rich oil and gas well environments. This ensures a long-lasting, reliable performance under harsh conditions.
Engineered to meet stringent low-temperature toughness requirements, the material exhibits a yield strength of ≥ 310MPa, with an impact absorption energy of ≥ 32J (single value) and ≥ 42J (average) at -20 ºC. For yield strength < 310MPa, it ensures ≥ 20J (single) and ≥ 27J (average), exemplifying superior resilience.
High Strength Alloy Steel
In non-corrosive environments, conventional carbon and alloy steels, like 50 C12 and 50 C4, undergo mechanical performance enhancements through advanced processes such as hot rolling and cold drawing, ensuring peak performance.
2. Manufacturing Standards
Chinese National Standard (GB/T 31049-2022)
According to national standards, the top drive Main Shaft undergoes rigorous static load tensile testing. This includes clarifying parameters for various drilling depths (e.g., Main Shaft inner diameter ≥ 102mm at 15,000 meters depth, short-term max torque ≥ 150kN·m), ensuring robust performance.
Newly introduced technical specifications for direct drive top drives emphasize the elimination of mechanical transmission mechanisms when directly connected to the motor, elevating transmission efficiency to an impressive 95%.
API Standard (API Spec 8C/8A)

Maintenance Methods for Top Drive Main Shaft

1, Daily Maintenance - Elevate Your Operational Efficiency
Cleaning and Lubrication - The Basics of Longevity
Ensure pristine performance by diligently removing mud and oil stains from the Main shaft's surface post-operation. Employ non-woven fabrics to meticulously wipe critical areas such as taper joints, safeguarding them against chemical corrosion.
Enhance the machine's lifespan by supplementing with the recommended lubricating grease like lithium-based options. Adhere to the manufacturer's guidelines, ensuring the oil injection cycle for main shaft bearings does not exceed 200 hours. Precisely control the injection amount to prevent contamination and uphold operational integrity.
Fastener Inspection - Securing Optimal Performance
Conduct regular assessments of the pre-tightening force on main shaft connecting bolts, including lifting ring screws and coupling bolts. Torque must align with technical manual standards, such as DQ70BS top drive specifications, where bolt torque should be ≥ 1200N · m.

2, Regular Maintenance - Sustaining High Performance
Bearing and Seal Testing - Precision and Proactivity
Every 500 hours, dismantle and scrutinize the Main shaft bearing for wear. Use a micrometer to measure radial clearance, replacing components if clearance exceeds 0.05mm, ensuring seamless performance.
Quarterly, replace seals such as O-rings, prioritizing fluororubber materials to combat hydrogen sulfide corrosion and reinforce durability.
Conical Interface Maintenance - Precision in Performance
Monthly inspections of the Main shaft cone mouth are crucial. Should the tool holder's contact rate dip below 75%, grinding and repair are essential to prevent 'horn mouth' induced excessive jumping.