Substantiation of Type and Parameters of Downhole Air Hammer with a View to Increase Small Diameter Hole Drilling Velocity
V. I. KLISHIN1, D. I. KOKOULIN2, B. KUBANYCHBEK2, S. E. ALEKSEEV2, I. O. SHAKHTORIN2
1Institute of Coal, Siberian Branch, Russian Academy of Sciences, Leningradskii pr. 10, Kemerovo, 650065 Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: скважина, энергия удара, вращение, крепость пород, скорость бурения, погружной пневмоударник, drill hole, blow energy, rotation, rock hardness, drilling velocity, downhole air hammer
Abstract
The article substantiates the need of designing a rotary-percussion drilling tool to drill holes 40-60 mm in diameter and to 50 m long. The drilling rig with a downhole air hammer has been designed and manufactured. The authors have carried out analytical and experimental research to determine drilling velocity in different rocks of varying hardness.
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