Recent advances in additive manufacturing (AM) technology provide the potential for on-demand and rapid production of spare parts during urgent repair times. Recently, big oil gas companies have shown early progress using specific heat exchangers, downhole cleanout tool nozzles, offshore risers, turbine subsea chemical stick injection tools. Despite mentioned progress, current adoption level in...

Conventional design method of the downhole tractor is based on cementing casing, which only suitable for smooth wellbore. For open hole well, conventional has poor adaptability and even cannot work normally. In order to improve obstacle surmounting performance wheeled (WDR) expand application range WDR, a double push rod-double spring support adjustment mechanism (DPRDSSAM) proposed in this pap...