APPARATUS FOR DIRECTING AND STEERING THE FOREMOST PART OF A DRILLPIPE AT DRILLINGS - Patent 0954673

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EP 0 954 673 A2

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(43)	Date of publication:
	10.11.1999 Bulletin 1999/45

(21)	Application number: 98901126.0

(22)	Date of filing: 22.01.1998

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International Patent Classification (IPC):

E21B 7/ 06^{( . )}
E21B 23/ 00^{( . )}

E21B 17/ 046^{( . )}

(86)	International application number:
	PCT/NL1998/000045

(87)	International publication number:
	WO 1998/031915 (23.07.1998 Gazette 1998/29)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

22.01.1997 NL 19971005055

(71)	Applicant: VAN DEN BERGH, Johannes, Wilhelmus, Henricus
	NL-1861 HA Bergen (NL)

(72)	Inventor:
	VAN DEN BERGH, Johannes, Wilhelmus, Henricus NL-1861 HA Bergen (NL)

(74)	Representative: Koomen, M.J.I., et al
	Kennemerstraatweg 35-37 1814 GB Alkmaar 1814 GB Alkmaar (NL)

(54)	APPARATUS FOR DIRECTING AND STEERING THE FOREMOST PART OF A DRILLPIPE AT DRILLINGS