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Streamflow rod coupling
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
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Counterbored coupling, английский
A drill-rod coupling in which the opening at each end is counterbored or tapered to an included angle of 20°; hence drilling fluid can flow through the coupling with less turbulence and ¦loss of head than when pumped through a standard drill-rod coupling. also called stream-flow-rod coupling.
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Countercurrent circulation, английский
Counterbored coupling, английский
A drill-rod coupling in which the opening at each end is counterbored or tapered to an included angle of 20°; hence drilling fluid can flow through the coupling with less turbulence and ¦loss of head than when pumped through a standard drill-rod coupling. also called stream-flow-rod coupling.
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