Adopting internationally advanced key distribution technology, the overlapping integration of internal and external keys improves the reliability and performance of the kelly bar.

All kelly bar are made of high-strength alloy high-quality pipes to ensure the dimensional accuracy, excellent mechanical properties and welding adaptability of the kelly bar. Special steel pipes (such as core-section steel pipes, etc.) are subjected to improved secondary strengthening heat treatment, which greatly improves the kelly bar. torsional performance.

All  of the kelly bar are made of high-strength, high-quality alloy structural steel and are fully strengthened. The internal keys adopt an overall arc plate structure, which greatly improves the wear resistance and life of the internal and external key bars, thereby reducing the failure rate of the kelly bar. and maintenance.

Reasonable piping configuration maximizes the key strip thickness and steel pipe wall thickness of the kelly bar, improves the kelly bar’s ability to transmit torque and pressurized drilling, and reduces the occurrence of kelly bar problems such as stuck rods, belt rods, and rolling keys. .

The unique double retaining ring structure increases the guide length when the kelly bar is fully extended, which not only solves the problem of easy deformation of the steel pipe end, but also increases the coaxiality and anti-bending performance of the kelly bar when it is fully extended, reducing the cost of the kelly bar. When drilling under pressure, there is a probability of inclined holes.

Professional kelly bar technology for deep hole, hard rock, and sandy pile hole construction, optimized construction plans and a strong construction technical team can eliminate the difficulties caused by construction in complex strata. Jiujie kelly bar can improve drilling efficiency and obtain The first choice for maximum efficiency.