JTHL was founded in 2003 year which specialized in producing Kelly bar & Spare parts & Used drilling rig. It's located in Beijing that the capital of China, meanwhile the branch factory located in the Shandong province, China.

​Till now JTHL have granted 35 patents in Kelly bar design & producing technology field. Especially the Combined lock type Kelly bar which combined the Bauer normal lock type and the changed IMT lock type( patent No. ZL 2012 2 0161611.0). It's successfully applied to the complicted strong rock soil layer which get high praise from domestic and overseas.

​Expect the standard dimension Kelly bar for Bauer, Soilmec, Mait, IMT, Casagrande, Liebherr, Sany, XCMG, Zoomlion, CSR/TEG, Sunward, Lovol, Foton, CMV, Jintai, etc., We factory also accept producing kelly bar as customers special dimension or drawing.

​JTHL highly focuses on international cooperation and communication. Till now, our products have been exported to many countries and regions such as Germany, Singapore, Greece, Russia, Turkey, the Middle East and South America, UK, Brazil, Vietnam, Myanmar, Indonesia, Malaysia, Pakistan etc.

​JTHL produce drilling buckets, drillig auger, core barrel, any model drilling rig drilling tools.

We sincerely welcome to start win-win  long cooperation with your esteemed company !  Meanwhile, Any professional agent or distributor is warmly welcomed !