API 7 1/2" 190.5mm Hard Rock Water Well Drill Bits

API 7 1/2" 190.5mm Hard Rock Water Well Drilling Bits

* This Series Tricone Bit Diameter from 3 7/8" to 36 inch, IADC Code from 117 to 137.

* Bearing : Rubber (O-Ring )Sealed Journal Bearing Bit

Beijing Silk Road Enterprise Management Services Co.,LTD located in Beijing,China, for more than 10 years we have specilized in research, development and produce of rock blasting drilling rig, water well drilling rig, diamond core drilling rig, anchor drilling rig, and relative accessories & drilling services.

Beijing Silk Road will always focus on the strategic conception of “Survival by quality, Development by credit’’, to provide users with high quality drilling solutions.In our after sales service system, We establish perfect control system strictly according to ISO-9000 series, in this system, technology date and problem solve solution and preventive measures will be provided in any maintain project, all the spare parts will be used in new OEM products with installation instructions, packing list, manufacturer's instruction, qualification and Warranty certificate.

We provide "one equipment & one case, endless service, namely the after sales service begin from the order confirmation, last for the working life of the equipment.

Followed the principle and policy of " First-class Quality, First-class Service" Shanghai Rotorcomp insists on improving ourselves into a first-class supplier for the air compressor.