Chengdu Zhonghang Machinery Co., Ltd. was established by Chinese oildrilling rig experts, with good experience in the rig manufacturingfield. We have a number of patented technologies, with a wealth of designexperience, sophisticated manufacturing process, and on-time delivery.We created tiger-rig brand 10 years ago, which is a well-known Chinesebrand.We have 20 years of experience in drilling rig manufacture. Up tonow, we have more than 80 kinds of rigs, operating well and normally inAmerican....