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for prediction of penetration rate of rotary drilling in

Development of a new classification system for prediction of penetration rate of rotary drilling in open pit minesThis paper describes a fuzzy classification

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An Overview of Home-made Rotary Hoses

This article presents a 30-year summary of the development of the rotary drilling hose in China. The key features of the various products are discussed

spacing effects on penetration rate of rotary drilling in

Physical modeling of joints spacing effects on penetration rate of rotary drilling in open pit minesdoi:/p>

Drilling rigs and technologies

a rigid pipe (standpipe) and aflexible one (hose), closing the circuit. is thecharacteristic element of rotary drilling, as it permitsthe continuous

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Steel circulating hose for rotary well drilling systemsdoi:US1963368 AJohnson, Arthur E

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