Chien-Hung Enterprise Co., Ltd. Is a Taiwanese company established on February 5, 2026. The company was founded due to the author's over 18 years of experience using COPROD drill strings on the ATLAS F9-CR drilling rig. The COPROD section includes ROD, TUBE, ROD GUIDE, and END PICE, while Out Tube, END PICE, Tube adapter, etc. These parts are of excellent quality, comparable to original equipment manufacturer (OEM) parts, durable, and cost-effective, significantly reducing user operating costs. Recently, Asia Cement's subcontracted quarrying project, Yuan Tai Co., Ltd., requested the supply of COPROD drill strings and other parts to reduce quarrying project costs and enhance the company's competitiveness. Due to the large demand, a new company was established to meet customer needs and solve problems.

Currently, the COPROD drill strings are used on the Epiroc C50 drilling rig, with specifications including 89mm and 102mm COPROD drill strings.