How to Prevent Jamming and Dropping in Rotary Drilling? - hnironrubikcubemachine.com

Rotary drilling is a critical process in foundation engineering. However, it is often accompanied by challenges such as jamming and dropping of the drilling tool. Understanding how to prevent these issues can significantly improve efficiency and reduce downtime.

What Causes Jamming and Dropping in Second-Hand Rotary Drilling Rigs?

Jamming occurs when the drilling tool gets stuck due to improper soil conditions, equipment failure, or inadequate lubrication. Dropping happens when the drill pipe disengages unexpectedly, leading to delays and financial loss.

Key Causes:

  • Soil Composition: Highly cohesive clay or mixed soil layers can increase resistance.
  • Improper Lubrication: Lack of proper drilling fluid results in increased friction.
  • Worn-Out Parts: Second-hand rotary drilling rigs may have degraded components, leading to frequent breakdowns.
  • Misalignment: If the drill string is not aligned properly, it increases stress and the chances of detachment.

How to Avoid Jamming in a SANY Used Rotary Drilling Rig?

  1. Select the Right Drilling Fluid: Ensure that the viscosity and density match the soil conditions.
  2. Regular Equipment Maintenance: Check for wear and tear, especially in reconditioned rotary drilling rigs.
  3. Monitor Drilling Speed: Excessive force increases the risk of jamming; maintain an optimal rate.
  4. Use High-Quality Casing Shoes: Protect the drilling bit from excessive wear in challenging terrains.

Why Is Dropping a Serious Issue in XCMG Used Rotary Drilling Rigs?

Dropping not only results in lost productivity but also increases safety hazards. It can occur due to:

  • Loose coupling between drill rods.
  • Overloading the rig beyond its capacity.
  • Malfunctioning hydraulic systems in reconditioned rotary drilling rigs.

What Are the Best Practices to Prevent Dropping in SANY Used Rotary Drilling Rigs?

  • Tighten Drill Pipe Connections: Ensure secure fastening before initiating drilling.
  • Use Torque Monitoring Tools: Real-time data can prevent over-stressing the drill pipe.
  • Regular Hydraulic System Checks: Faulty hydraulics can weaken the grip on the drill rod.
  • Employ Anti-Drop Devices: Modern rigs come with safety mechanisms that reduce accidental disengagement.

Conclusion

Avoiding jamming and dropping in second-hand rotary drilling rigs requires a combination of proper equipment maintenance, drilling technique refinement, and soil condition analysis. Investing in high-quality reconditioned rotary drilling rigs can also improve operational reliability.

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