Издание на английском языке
The new fourth edition has pulled together the newest innovations for both the direct circulation and the reverse circulation technologies over that past decade, and condensed the important engineering calculations and applications for both of these important drilling technologies. The major innovation in direct circulation has been the development of the ability to drill long reach and medium reach directional drilling with BH As composed of PDMs rotating DTHs. In reverse circulation Art Holte and his team in Oregon developed the ability to drill large diameter boreholes and grout them as the drilling equipment is withdrawn from the borehole. These are spectacular inventions for the industries they serve. This fourth edition, as in the third edition, makes use of the Mathcad mathematical modeling. These example solutions show step-by-step calculations in familiar mathematics that can be duplicated in any of the engineering programming languages, FORTRAN, C+, MatLab, etc. Mathcad is an important tcx)l for teaching engineers and technicians the logic orderly solutions and the value of the calculations for planning.