Durable Nov Varco TDS11SA TDS8SA Top Drive Main Shaft Dq

• 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 acts as a vital link between the faucet and the drilling motor, channeling power directly to the drill string. This ingenious design enables the drilling tool to rotate seamlessly, thus executing drilling operations with unmatched efficiency. Unlike conventional rotary drive methods, our Main shaft excels in continuous rotation and casing operations, significantly amplifying drilling efficiency.
2. Drill string connection and load support;
Connected robustly to the integral faucet via a gearbox housing, the main shaft collaborates with lifting rings and elevators to support the entire drill string's weight and dynamic loads during operations. Whether connecting the column or flipping the eye, the Main shaft ensures impeccable stability and precise alignment of the drill string, safeguarding the integrity of the operation.
3. Automated control and parameter monitoring;
Our advanced top drive systems are equipped with sensors that vigilantly monitor the rotation angle, torque, and other essential parameters of the main shaft in real-time. By harnessing AI algorithms, we optimize drilling control. Notably, PetroChina's patented technology employs a distance measuring device to collect Main shaft rotation data, offering precise feedback for underground operations.
4. Risk Control and Security Assurance;
The Main shaft's design strength and execution efficiency are critical to maintaining drilling safety. In scenarios of potential sticking or obstruction, the Main shaft can swiftly adjust its rotation direction or apply reverse torque, effectively mitigating the risk of drilling tool jamming and ensuring a smooth operation.

Material and Manufacturing Standards of Top Drive Main Shaft

1, Material requirements
Hydrogen sulfide resistant alloy steel
Crafted from specialized alloy steel that resists hydrogen sulfide (H2S) corrosion, the Main shaft is engineered to withstand the harsh environments of sulfur-rich oil and gas wells, ensuring enduring performance and reliability.
The material is designed to meet rigorous low-temperature toughness standards: with yield strength ≥ 310MPa, a single impact absorption energy at -20 ºC must be ≥ 32J, with an average value of ≥ 42J; for yield strength <310MPa, a single value must be ≥ 20J, with an average of ≥ 27J.
High strength alloy steel
Non-corrosive environment applications typically use conventional carbon steel (such as 50 C12, 50 C4) or alloy steels (nickel chromium, chromium vanadium), which require enhancements in mechanical performance through processes like hot rolling and cold drawing.
2, Manufacturing standards
Chinese National Standard (GB/T 31049-2022)
Specifications demand that the top drive Main shaft undergo rigorous static load tensile testing, with detailed parameters for varied drilling depths (e.g., Main shaft inner diameter ≥ 102mm for depths of 15000 meters, and short-term maximum torque ≥ 150kN·m).
Innovative technical specifications for direct drive top drives now eliminate mechanical transmission mechanisms when the Main shaft connects directly to the motor, elevating transmission efficiency up to 95%.
API Standard (API Spec 8C/8A)
Designs of main load-bearing components must undergo finite element analysis to verify high and low-stress zones, while meeting the stringent safety factors required by PSL1 or PSL2 levels.
A comprehensive load verification test is mandated (e.g., DQ70 top drive test load ≥ 9000kN). Selection and Certification

Both land and ocean drilling applications must adhere to GB/T 31049 or API standards, respectively. Products achieving ISO 9001/API dual certification are qualified for international market entry.
The direct drive Main shaft necessitates additional verification for the electromechanical integration reliability between the motor and the Main shaft, due to the gearbox cancellation.

Maintenance methods for top drive Main Shaft

1, Daily maintenance
Cleaning and lubrication
To ensure the longevity and optimal performance of your Durable Nov Varco TDS11SA TDS8SA Top Drive Main Shaft, VSP Brand, meticulously clean the mud and oil residues from the shaft's surface after daily operations. Employ non-woven fabric to gently wipe critical areas, such as taper joints, to shield them from potential chemical corrosion.
Maintain the pinnacle of operability by supplementing with lubricating grease, like lithium-based grease, as per the manufacturer's guidelines. Adhere to an oil injection cycle for the main shaft bearings not exceeding 200 hours, ensuring precise control over the amount to prevent contamination and ensure seamless functionality.
Fastener Inspection: A must-do for ensuring secure and safe operations.
Regularly assess the pre-tightening force of the main shaft connecting bolts, including lifting ring screws and coupling bolts. Ensure the torque aligns with technical manual standards, such as the DQ70BS top drive, which mandates a bolt torque of ≥ 1200N · m, safeguarding against operational anomalies.

2, Regular Maintenance: Your blueprint for uninterrupted efficiency.
Bearing and Seal Testing: Essential for sustained peak performance.
Conduct a disassembly and thorough inspection of the Main shaft bearing every 500 hours. Utilize a micrometer to measure radial clearance, and promptly replace bearings if the clearance surpasses 0.05mm to maintain precision and reliability.
Replace seals, such as O-rings, quarterly. Opt for fluororubber material to provide robust resistance against hydrogen sulfide corrosion, ensuring durability and protection.
Conical Interface Maintenance: Key to maintaining precision and alignment.
Monthly inspections of the Main shaft cone mouth are crucial. If the tool holder's contact rate falls below 75%, it necessitates grinding and repair to avert excessive jumping caused by the 'horn mouth,' ensuring smooth operations.

3, Fault Prevention and Handling: Proactively safeguard against potential issues.
Vibration and Temperature Monitoring: Install vibration sensors for real-time monitoring of any abnormal vibrations in the Main shaft (threshold ≤ 2.5mm/s). If a temperature rise exceeds 60 ºC, cease operations to address lubrication or bearing concerns, thus preventing damage.