Tepc Honghua Varco TDS11SA TDS8SA Dq 30 Dq500z Top Drive 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

Detail Function:

1. Power Transmission and Rotational Drive;
The robust VSP Nov Varco TDS11SA TDS8SA Top Drive Main Shaft is a marvel of engineering, directly linking the faucet with the drilling motor. This impeccable connection enables the transmission of power to the drill string, seamlessly driving the drilling tool into action. Unlike traditional rotary methods, this Main Shaft ensures uninterrupted rotation and casing operations, significantly boosting drilling efficiency and optimizing performance.
2. Drill String Connection and Load Support;
Ingeniously connected through a gearbox housing, the main shaft teams up with components like lifting rings and elevators, shouldering the entire weight of the drill string and managing dynamic loads with ease. During column connections or eye-flipping, this Main Shaft stands as a pillar of stability and precision, ensuring impeccable drill string alignment and operational excellence.
3. Automated Control and Parameter Monitoring;
Embrace the future with modern top drive systems that vigilantly monitor the rotation angle, torque, and other vital parameters of the Main Shaft in real-time. Advanced AI algorithms optimize drilling control, with groundbreaking technology from PetroChina using distance measuring devices to provide precise feedback on shaft rotation, enhancing the accuracy of subterranean operations.
4. Risk Control and Security Assurance;
The design prowess and execution efficiency of the Main Shaft are pivotal to drilling safety. In scenarios of obstruction or entrapment, the Main Shaft adeptly adjusts its rotation or applies reverse torque, mitigating the risk of tool jamming and enhancing operational security.

Material and Manufacturing Standards of Top Drive Main Shaft

1. Material Requirements
Hydrogen Sulfide Resistant Alloy Steel
Crafted from a specialized alloy steel impervious to hydrogen sulfide (H2S) corrosion, the Main Shaft promises unmatched durability, thriving in the rigorous sulfur-laden environments of oil and gas wells.
This material excels in low-temperature toughness: With a yield strength of ≥ 310MPa, the impact energy at -20 ºC reaches a single value of ≥ 32J, averaging ≥ 42J. For yield strengths <310MPa, single values achieve ≥ 20J, with an average of ≥ 27J, ensuring resilience in diverse conditions.
High Strength Alloy Steel
In non-corrosive environments, conventional carbon steel (e.g., 50 C12, 50 C4) or alloy steel (nickel chromium, chromium vanadium) undergo mechanical enhancement through hot rolling and cold drawing, elevating their performance to meet demanding 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 varying drilling depths. For instance, a shaft inner diameter of ≥ 102mm is required at a 15000-meter depth, alongside a short-term maximum torque of ≥ 150kN·m.
Innovative specifications for direct drive top drives eliminate mechanical transmission mechanisms when the Main Shaft directly connects to the motor, enhancing transmission efficiency to an impressive 95%.
API Standard (API Spec 8C/8A)
Designs of main load-bearing components undergo rigorous finite element analysis to identify stress zones, with safety factors adhering to PSL1 or PSL2 standards, ensuring reliability under pressure.
A load verification test is essential, exemplified by the DQ70 top drive test load, which must reach ≥ 9000kN. Selection and Certification

Land and ocean drilling and production must align with GB/T 31049 or API standards. Products achieving ISO 9001/API dual certification are primed for the global stage, ready to conquer international markets.
The innovative direct drive Main shaft necessitates rigorous verification of the electromechanical integration reliability between the motor and the Main shaft due to the elimination of the gearbox, ensuring seamless performance and durability.

Maintenance Methods for Top Drive Main Shaft

1. Daily Maintenance
Cleaning and Lubrication
Meticulously clean any mud and oil stains off the Main shaft surface after daily operations. Use non-woven fabric to delicately wipe critical areas (like taper joints) to prevent chemical corrosion and maintain optimal condition.
Regularly supplement with lubricating grease (such as high-quality lithium-based grease) in accordance with the manufacturer's guidelines. Ensure the oil injection cycle for the Main shaft bearings does not exceed 200 hours, and precisely control the oil amount to prevent contamination.
Fastener Inspection
Conduct regular inspections of the pre-tightening force on the Main shaft's connecting bolts (including lifting ring screws and coupling bolts). Ensure the torque aligns with technical manual standards, like those for the DQ70BS top drive, requiring bolt torque ≥ 1200N · m.

2. Regular Maintenance
Bearing and Seal Testing
Every 500 hours, disassemble and inspect the Main shaft bearing for wear. Use a micrometer to measure radial clearance, replacing the bearing if the measurement exceeds 0.05mm.
Replace seals (such as O-rings) quarterly, opting for fluororubber material to effectively resist hydrogen sulfide corrosion and ensure long-lasting durability.
Conical Interface Maintenance
Monthly, examine the wear on the Main shaft cone mouth. If the tool holder's contact rate falls below 75%, perform grinding and repairs to prevent excessive jumping caused by the 'horn mouth' effect.

3. Fault Prevention and Handling
Vibration and Temperature Monitoring
Implement vibration sensors to continuously monitor the Main shaft for abnormal vibrations (threshold ≤ 2.5mm/s). If the temperature rise exceeds 60 ºC, halt the machine to investigate lubrication or bearing issues.
Emergency Measures
In the event of a sudden drill jam, promptly activate the IBOP blowout preventer, cut the power, and manually rotate the disc to release torque, thus avoiding overload and deformation of the Main shaft.