Why Kelly Bar Length and Section Design Directly Impact Rotary Drilling Efficiency
In foundation drilli […]
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Kelly Bar Maintenance: How to Extend Service Life and Reduce Downtime
A practical Kelly bar maintenance guide for overseas rotary drilling rig buyers, covering wear inspection, operation habits, spare parts and export protection.
Friction Kelly Bar or Interlocking Kelly Bar: How Buyers Should Choose for Real Jobsite Conditions
Choosing a friction Kelly bar or an interlocking Kelly bar should start from soil condition, rig torque, drilling depth, and the real cost of downtime. This guide explains how buyers can compare both types before requesting a quotation.
