¾ A practical check of the efficiency of bit hydraulic program Pressure Losses ¾ The circulation system consists of: pump, surface connections (stand pipe, hose, swivel and Kelly), drill pipe, drill collars, bit, annulus between drill collars and hole, annulus between drill pipe and hole, mud return lines, and mud tanks.May 31, 2018 · This is the second article of our Technical Series on Drill Rig Capa. Click here for an outline of the entire Drill Rig Capa Series.. Examples of twomon HYDRAULIC LONGSTROKE drill rigs. In the first article in this series I explained that hydraulic long stroke drills can trip drill rods in two different ways, using the main feed cylinder and using a hoist and wire …• Four Drilling Techniques are integrated in the rigs operating modes: rotary drilling, standard oilfield coring, wireline coring and reverse circulation airated drilling. Two new developed top drive systems, for rotary drilling and wireline coring, give maximum performance in adjusting the rig to the selected drilling mode.Home / Products / Drilling Rigs / Geotechnical Drilling Rigs / Dando Terrier Rotary Rig Dando Terrier Rotary Rig Perfect for work in confined spaces of edibly versatile rotary drilling rig can be used for continuous flight & hollow stem augering, coring as well as drilling with tricones, drag bits and DTH hammers.