China s Downhole Drilling Methods

How to exploit efficiently unconventional hydrocarbon has become an important step to solve the problem of increasing reserve and production of oil & gas in China. Aiming at unconventional oil & gas well e. [pdf]

Casing shoe drilling rig

The guide shoe is simply a plain end device run on the bottom of any type of casingwith a cement or composite bottom and a restricted hole through the center. It is rounded on the bottom so it will pass. [pdf]