Method and apparatus for controlling the operation of cluster drill of DTH hammers

(19)

(11)

EP 2 626 505 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	13.09.2017 Bulletin 2017/37

(43)	Date of publication A2:
	14.08.2013 Bulletin 2013/33

(21)	Application number: 13154119.5

(22)	Date of filing: 06.02.2013

(51)

International Patent Classification (IPC):

E21B 4/16^(2006.01)

E21B 4/14^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

(30)

Priority:

10.02.2012 HK 12101330

(71)	Applicant: Top Mark Mechanical Equipment Limited
	Hong Kong (CN)

(72)	Inventors:
	Chan, Leung Choi Hong Kong (CN) Chan, Kin Choi Hong Kong (CN)

(74)	Representative: Modiano, Micaela Nadia
	Modiano & Partners (DE) Thierschstrasse 11 80538 München 80538 München (DE)

(54)	Method and apparatus for controlling the operation of cluster drill of DTH hammers

(57) 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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