Method and apparatus for controlling the operation of cluster drill of down-the-hole hammers
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United States of America Patent
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Nov 3, 2015
Grant Date -
Aug 15, 2013
app pub date -
Feb 8, 2013
filing date -
Feb 10, 2012
priority date (Note) -
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Abstract
An apparatus for drilling hole, comprising: a cluster drill of down-the-hole (DTH) percussion hammers having two or more DTH percussion hammers; and a special distributor having rotatable swivels for sourcing compressed air or pressurized fluid from independent supply sources and distributing to the DTH percussion hammers; wherein the DTH percussion hammers are arranged such that one or more circumferential layers of drill bits are formed covering the drilling area; and wherein within each circumferential layer, at least one DTH percussion hammer is supplied with the compressed air or pressurized fluid from an independent supply source that is different from the independent supply source supplying the other DTH percussion hammers.
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