Vsp Certified Nov Varco TDS11SA TDS8SA Top Drive API Main Shaft

• 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

Detailed Functions:

1. Power Transmission and Rotational Drive;
The Main Shaft is the powerhouse of the top drive system, seamlessly transmitting energy from the faucet and drilling motor to the drill string. It propels the drilling tool into action with relentless rotation and precision, elevating the efficiency of every drilling operation. Unlike conventional rotary drives, the Main Shaft guarantees uninterrupted rotation and casing operations, making it indispensable for enhanced drilling prowess.
2. Drill String Connection and Load Support;
Ingeniously connected to the integral faucet via a robust gearbox housing, the Main Shaft is a master of load-bearing. Working harmoniously with lifting rings and elevators, it shoulders the complete weight of the drill string and dynamic operational loads. Whether connecting columns or flipping the eye, the Main Shaft ensures unwavering stability and flawless alignment of the drill string, setting the stage for precise and efficient drilling.
3. Automated Control and Parameter Monitoring;
In the realm of modern drilling, top drive systems boast cutting-edge sensors that vigilantly monitor the rotation angle, torque, and a myriad of other parameters of the Main Shaft in real-time. AI algorithms are employed to optimize the control of drilling processes. Notably, PetroChina's groundbreaking technology uses a distance measuring device to capture Main Shaft rotation data, providing impeccable feedback for subterranean operations.
4. Risk Control and Security Assurance;
The Main Shaft's design strength and operational efficiency are pivotal to drilling safety. In scenarios of potential threats like tool jams or obstructions, the Main Shaft swiftly adapts its rotation or applies counter-torque, significantly mitigating the risks of drilling complications and ensuring secure and continuous operations.

Material and Manufacturing Standards of Top Drive Main Shaft

1. Material Requirements
Hydrogen Sulfide Resistant Alloy Steel
Crafted from specialized alloy steel that stands resilient against the corrosive nature of hydrogen sulfide (H2S), the Main Shaft promises longevity in sulfur-laden oil and gas well environments, making it a stalwart in harsh drilling conditions.
The material adheres to stringent low-temperature toughness standards: with a yield strength of ≥ 310MPa, the single impact absorption energy at -20 ºC is ≥ 32J, and the average is ≥ 42J; for yield strengths < 310MPa, the single value is ≥ 20J, and the average is ≥ 27J.
High Strength Alloy Steel
For use in non-corrosive environments, conventional carbon steels (like 50 C12, 50 C4) or alloy steels (nickel chromium, chromium vanadium) undergo mechanical performance enhancements through advanced processes like hot rolling and cold drawing.
2. Manufacturing Standards
Chinese National Standard (GB/T 31049-2022)
Mandates that the top drive Main Shaft undergo rigorous static load tensile testing, with specific parameters defined for varying drilling depths (e.g., Main Shaft inner diameter ≥ 102mm at 15000 meters, with short-term max torque ≥ 150kN · m).
Recent technical upgrades demand the elimination of mechanical transmission mechanisms for direct motor connections, enhancing transmission efficiency to an impressive 95%.
API Standard (API Spec 8C/8A)
Critical load-bearing designs undergo finite element analysis to verify stress zones, ensuring safety factors align with PSL1 or PSL2 standards.
Load verification tests are obligatory (e.g., DQ70 top drive test load ≥ 9000kN). Selection and Certification

Both land and marine drilling operations must adhere to GB/T 31049 or API standards, respectively. Products achieving ISO 9001/API dual certification are greenlighted for global market entry.
The direct drive Main Shaft demands additional scrutiny for the electromechanical integration reliability between the motor and Main Shaft, following gearbox removal.

Maintenance Methods for Top Drive Main Shaft

1. Daily Maintenance
Comprehensive Cleaning and Lubrication Practices
Diligently remove mud and oil residues from the Main Shaft's surface after each day's operations. Use non-woven fabric to meticulously clean critical areas, such as taper joints, to prevent chemical corrosion and maintain optimal performance.
Ensure that lubricating grease, like lithium-based grease, is replenished as per manufacturer's guidelines. The oil injection cycle for the main shaft bearings should not exceed 200 hours. Control the oil injection precisely to prevent any contamination and ensure smooth operation.
Thorough Fastener Inspection
Regularly scrutinize the pre-tightening force of the main shaft connecting bolts, including lifting ring screws and coupling bolts. Ensure the torque complies with technical manual standards, such as the DQ70BS top drive specifications, which require bolt torque ≥ 1200N·m.

2. Scheduled Regular Maintenance
Comprehensive Bearing and Seal Testing
Every 500 hours, disassemble and inspect the Main Shaft bearing for wear. Use a micrometer to measure the radial clearance, replacing it if it exceeds 0.05mm, to ensure continued reliability and performance.
Replace seals, such as O-rings, quarterly. Prioritize the use of fluororubber materials to effectively resist corrosion from hydrogen sulfide.
Conical Interface Upkeep
Each month, examine the wear on the Main Shaft cone mouth. If the tool holder's contact rate falls below 75%, grind and repair it to prevent excessive jumping from the 'horn mouth' effect, thus ensuring operational precision.

3. Fault Prevention and Resolution
Advanced Vibration and Temperature Surveillance
Install vibration sensors to monitor the Main Shaft for abnormal vibrations in real time, maintaining a threshold ≤ 2.5mm/s. If the temperature rise surpasses 60ºC, halt operations to investigate lubrication or bearing problems promptly.
Proactive Emergency Protocols
In the event of a sudden drill jam, immediately activate the IBOP blowout preventer, disconnect power, and manually rotate the disc to release torque, thus preventing overload and deformation of the Main Shaft.