Description of Drill Stem Subs:
The drill stem subs are mainly used to connect various drill rods (stems) in the geological drilling. These subs can be used to protect drill stem (rod) from consumption in the way of making the connector to bear most of torque force.

Concerning packing and shipping, our drill stem subs are packaged by wooden boxes, and can be transported by air and sea. And automobile transportation is also available. 

As a professional manufacturer of drill stem subs in China, Wuxi Huaxin Petroleum Machine Co., Ltd. still provide customers worldwide with core drilling rig, slurry pump, horizontal directional drilling tools, HDD drill rods, etc. All of our products have passed the certification of ISO9001: 2000 and API 5DP. With high quality and competitive price, our products have been well received by customers from Mongolia, Kazakhstan, Russia, Iran, Afghanistan, Oman, Turkey, Thailand, Vietnam, Myanmar, Malaysia, Indonesia, Singapore, Taiwan, Colombia, Mexico, Brazil, Canada, Australia, etc. If you're interested in our drill stem subs, please contact us freely.