Vsp Quality Nov Varco TDS11SA TDS8SA Top Drive Main Shaft /API

• 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 Excellence;
The Main Shaft, a marvel of engineering, seamlessly connects to the faucet and drilling motor, channeling power to the drill string. This powerhouse drives the drilling tool with unmatched precision, achieving continuous rotation and casing operation. This innovation not only elevates drilling efficiency but also surpasses traditional rotary drive methods.
2. Drill String Connection and Load Support Mastery;
Ingeniously linked to the integral faucet via a robust gearbox housing, the Main Shaft unites with lifting rings and elevators. It shoulders the full weight and dynamic loads of the drill string, ensuring stability and precise alignment during operations like column connection or eye flipping.
3. Automated Control and Parameter Monitoring Prowess;
State-of-the-art top drive systems employ sensors to vigilantly monitor the Main Shaft's rotation angle, torque, and more in real-time. AI algorithms elevate drilling control, exemplified by PetroChina's cutting-edge technology, which uses distance measuring devices to gather rotation data, offering precise feedback for subterranean operations.
4. Risk Control and Security Assurance;
The meticulously crafted design and execution efficiency of the Main Shaft are pivotal to drilling safety. In emergencies, such as a jam, the Main Shaft swiftly recalibrates its rotation or applies reverse torque, effectively mitigating the risk of drilling tool entrapment.

Material and Manufacturing Standards of Top Drive Main Shaft

1. Material Excellence Requirements
Hydrogen Sulfide Resistant Alloy Steel
Crafted from specialized alloy steel, the Main Shaft boasts resistance to hydrogen sulfide (H2S) corrosion, ensuring durability in sulfur-laden oil and gas well environments.
The material exhibits superior low-temperature toughness, withstanding yield strengths ≥ 310MPa at -20 ºC, and achieving impact absorption energy values of ≥ 32J single and ≥ 42J average. For yield strengths <310MPa, it maintains single values ≥ 20J and averages ≥ 27J.
High-Strength Alloy Steel
In non-corrosive settings, traditional carbon steel (e.g., 50 C12, 50 C4) or alloy steel like nickel chromium and chromium vanadium undergo enhancements like hot rolling and cold drawing to boost mechanical performance.
2. Manufacturing Standards
Chinese National Standard (GB/T 31049-2022)
Specifications mandate static load tensile testing for the top drive Main Shaft, detailing parameters for varying drilling depths (e.g., Main Shaft inner diameter ≥ 102mm at 15,000 meters, short-term maximum torque ≥ 150kN · m).
Innovative direct drive top drive specifications require the elimination of mechanical transmission mechanisms, maximizing transmission efficiency to a stellar 95%.
API Standard (API Spec 8C/8A)
Designs for main load-bearing components undergo rigorous finite element analysis to verify high and low stress zones, meeting the demanding safety factor requirements of PSL1 or PSL2 levels.
A comprehensive load verification test is essential (e.g., DQ70 top drive test load ≥ 9000kN). Selection and Certification

Adaptation to GB/T 31049 or API standards is crucial for both land and ocean drilling and production. Products with ISO 9001/API dual certification are primed for the global market.
Due to the gearbox elimination, direct drive Main Shafts demand additional verification of electromechanical integration reliability between the motor and the Main Shaft.

Maintenance Methods for Top Drive Main Shaft

1, Daily Maintenance
Meticulous Cleaning and Expert Lubrication
After each day's work is complete, ensure the surface of the Main Shaft is free from mud and oil stains. Use a fine non-woven fabric to gently wipe critical areas like taper joints, safeguarding against harmful chemical corrosion.
Replenish lubricating grease, such as premium lithium-based options, precisely in line with manufacturer guidelines. The main shaft bearings require oil every 200 hours, with careful control of the amount to prevent any contamination.
Thorough Fastener Inspection
Consistently verify the pre-tightening force of the main shaft connecting bolts, including lifting ring screws and coupling bolts. Ensure torque aligns with technical manual standards, like the DQ70BS top drive which demands ≥ 1200N · m.

2, Regular Maintenance
Comprehensive Bearing and Seal Testing
Every 500 hours, disassemble and rigorously inspect Main Shaft bearings for wear. Use a micrometer to measure radial clearance, replacing bearings if clearance exceeds 0.05mm.
Replace seals such as O-rings every quarter, prioritizing the durable fluororubber material to withstand hydrogen sulfide corrosion.
Conical Interface Care and Maintenance
Monthly, assess the wear of the Main Shaft cone mouth. If the tool holder's contact rate falls below 75%, promptly grind and repair to prevent excessive 'horn mouth' jumping.

3, Fault Prevention and Handling
Advanced Vibration and Temperature Monitoring
Equip with vibration sensors for real-time monitoring of any abnormal Main Shaft vibration (threshold ≤ 2.5mm/s). If temperatures rise beyond 60 ºC, halt operations to address lubrication or bearing concerns.
Swift Emergency Response Measures
In the event of a sudden drill jam, immediately engage the IBOP blowout preventer, cut power, and manually rotate the disc to release torque, thereby avoiding Main Shaft overload and deformation.