IBOPs
Kelly valve is a manually operated ball type valve for the drill stem, divided into upper and lower sections. The upper Kelly valve is connected between lower end of swivel and upper end of Kelly. The lower Kelly valve is connected between upper end of drill pipe and lower end of Kelly or lower end of Kelly saver subs. The Kelly valve can be opened or closed off by simply turning a special operating wrench 90° according to indicated direction.
Key words:
For the wellbore quality problems caused by borehole steps and keyways, although the drilling and post-drilling reaming can be solved, the number of drilling is large and the efficiency is low, while the micro-reamer while drilling has significant advantages in eliminating the borehole steps, reducing the number of drilling and improving drilling efficiency.
All-metal hydraulic oscillator
Hydraulic oscillator is a downhole tool used to solve the bottom of the well support pressure and improve the transmission of drilling pressure. It is especially suitable for use in horizontal wells and extended-reach wells. It can be used simultaneously with MWDs, downhole power drilling tools, and any drill bit.
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