Nov Varco TDS11SA TDS8SA Top Drive Main Shaft with Vsp Trademark

• 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 Main Shaft is a critical component that seamlessly connects to the faucet and drilling motor. Its role is pivotal in transmitting power to the drill string, orchestrating the rotation of drilling tools, and ensuring the success of drilling operations. Unlike conventional rotary drive methods, the Main Shaft boasts the capability of continuous rotation and casing operation, markedly enhancing drilling efficiency.
2. Drill String Connection and Load Support;
Ingeniously connected to the integral faucet via a robust gearbox housing, the Main Shaft is designed to work harmoniously with components like lifting rings and elevators. It bears the substantial weight of the drill string and accommodates dynamic loads during operation. Whether connecting the column or flipping the eye, the Main Shaft guarantees stability and precise alignment of the drill string, ensuring seamless and efficient performance.
3. Automated Control and Parameter Monitoring;
In the realm of modern top drive systems, the Main Shaft stands out with its advanced monitoring capabilities. Sensors meticulously track rotation angle, torque, and additional parameters in real-time, while AI algorithms optimize drilling control. A notable example includes PetroChina's patented technology, which leverages a state-of-the-art distance measuring device to gather Main Shaft rotation data, providing exact feedback for subterranean operations.
4. Risk Control and Security Assurance;
The Main Shaft's design strength and operational efficiency are paramount to drilling safety. Should an obstruction or jamming incident occur, the Main Shaft can swiftly adjust its rotation or exert reverse torque, effectively mitigating the risk of drilling tool jams and ensuring a secure operational environment.

Material and Manufacturing Standards of Top Drive Main Shaft

1. Material Requirements
Hydrogen Sulfide Resistant Alloy Steel
Crafted from a specialized alloy steel resistant to hydrogen sulfide (H2S) corrosion, the Main Shaft is engineered for unparalleled durability in sulfur-rich oil and gas well environments.
The material must satisfy stringent low-temperature toughness criteria: with a yield strength ≥ 310MPa, it should achieve an impact absorption energy single value ≥ 32J at -20 ºC, with an average of ≥ 42J; for yield strength < 310MPa, the single value should be ≥ 20J, and the average ≥ 27J.
High Strength Alloy Steel
In non-corrosive settings, conventional carbon steel (such as 50 C12, 50 C4) or alloy steel (nickel chromium, chromium vanadium steel) necessitates mechanical performance enhancements through processes like hot rolling and cold drawing.
2. Manufacturing Standards
Chinese National Standard (GB/T 31049-2022)
This standard mandates that the top drive Main Shaft undergo static load tensile testing, with parameters defined for varying drilling depths (e.g., Main Shaft inner diameter ≥ 102mm at a 15000-meter drilling depth, and short-term maximum torque ≥ 150kN · m).
New technical guidelines for direct drive top drives have been introduced, advocating the removal of mechanical transmissions when the Main Shaft is directly connected to the motor, thereby boosting transmission efficiency to an impressive 95%.
API Standard (API Spec 8C/8A)
The design of the main load-bearing component must verify high and low stress zones through finite element analysis, ensuring the safety factor adheres to PSL1 or PSL2 levels.
A rigorous load verification test is required (e.g., DQ70 top drive test load ≥ 9000kN). Selection and Certification

Drilling and production on land and at sea must comply with GB/T 31049 or API standards, respectively. Products achieving ISO 9001/API dual certification are poised to enter the international market successfully.
The direct drive Main Shaft necessitates additional verification to ensure the reliability of electromechanical integration between the motor and the Main Shaft due to the gearbox's elimination.

Maintenance Methods for Top Drive Main Shaft

1. Daily Maintenance
Refined Cleansing and Lubrication Protocol
Perform meticulous cleaning to eliminate mud and oil residues from the Main Shaft's surface after each operational task. Employ a gentle non-woven fabric to meticulously cleanse key areas, such as taper joints, ensuring protection against chemical corrosion.
Adhere to manufacturer guidelines for replenishing lubricating grease, using high-quality options like lithium-based grease. Maintain an oil injection cycle not exceeding 200 hours, with precise control over the quantity to prevent contamination.
Thorough Fastener Evaluation
Conduct routine checks on the pre-tightening force of the Main Shaft's connecting bolts, including lifting ring screws and coupling bolts. Ensure torque levels align with technical manual standards, such as the DQ70BS top drive, requiring a bolt torque of ≥ 1200N·m.

2. Comprehensive Routine Maintenance
Precision Bearing and Seal Assessment
Every 500 hours, disassemble and scrutinize the Main Shaft bearing for wear. Use a micrometer to measure radial clearance, replacing the bearing if it surpasses 0.05mm.
Quarterly replacement of seals, like O-rings, is essential. Opt for fluororubber materials to combat hydrogen sulfide corrosion effectively.
Meticulous Conical Interface Preservation
Monthly inspections of the Main Shaft cone mouth wear are crucial. If the tool holder's contact rate drops below 75%, undertake grinding and repairs to preempt undue oscillation from the 'horn mouth' effect.

3. Proactive Fault Prevention and Resolution
Advanced Vibration and Temperature Surveillance
Install state-of-the-art vibration sensors for continuous monitoring of Main Shaft vibrations, maintaining a threshold of ≤ 2.5mm/s. If temperature elevations exceed 60ºC, initiate a machine stop to diagnose lubrication or bearing complications.
Robust Emergency Protocols
In events where the drill encounters sudden obstruction, promptly activate the IBOP blowout preventer and disconnect power. Manually rotate the disc to alleviate torque, preventing Main Shaft overload and deformation.