Shale is a layered mudrock that runs in ribbons through the earth. Though softer than many other types of rock, shale presents its own challenges during drilling.
This January will mark 40 years of experience of working with drilling fluids and drilling fluids recycling equipment for this author, and yours truly could write a book on drilling fluids mixing errors made by both vertical and horizontal directional drilling contractors.
As a skilled trade that takes pride in our chosen vocation, it is vastly important that we ensure the welfare and industry professional standards that we take pride in.