INTEGRATED INSPECTION AND MAINTENANCE RAISE BORING METHOD AND AN ASSOCIATED DRILL STRING ARRANGEMENT - Patent 3036401

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EP 3 036 401 A1

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(43)	Date of publication:
	29.06.2016 Bulletin 2016/26

(21)	Application number: 14837135.4

(22)	Date of filing: 22.08.2014

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International Patent Classification (IPC):

E21D 3/00^(2006.01)

(86)	International application number:
	PCT/IB2014/064019

(87)	International publication number:
	WO 2015/025299 (26.02.2015 Gazette 2015/08)

(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

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Priority:

23.08.2013 ZA 201306404

(71)	Applicant: Master Drilling South Africa (PTY) Ltd.
	2515 Gauteng (ZA)

(72)	Inventor:
	JORDAAN, Barend, Jacobus 2193 Gauteng Johannesburg (ZA)

(74)	Representative: HGF Limited
	1 City Walk Leeds LS11 9DX Leeds LS11 9DX (GB)

(54)	INTEGRATED INSPECTION AND MAINTENANCE RAISE BORING METHOD AND AN ASSOCIATED DRILL STRING ARRANGEMENT