A DRILL STRING DRIVE TO IMPART ROTATIONAL POWER TO A TOP END OF DRILL STRING FOR DRILLING OF A WELLBORE - Patent 4532883

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EP 4 532 883 A1

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(43)	Date of publication:
	09.04.2025 Bulletin 2025/15

(21)	Application number: 23728744.6

(22)	Date of filing: 25.05.2023

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International Patent Classification (IPC):

E21B 3/02^(2006.01)

(52)	Cooperative Patent Classification (CPC):
	E21B 3/022

(86)	International application number:
	PCT/EP2023/064012

(87)	International publication number:
	WO 2023/227704 (30.11.2023 Gazette 2023/48)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA
	Designated Validation States:
	KH MA MD TN

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Priority:

27.05.2022 NL 2032006

(71)	Applicant: Itrec B.V.
	3115 HH Schiedam (NL)

(72)	Inventor:
	DE MUL, Arthur Alexander 3115 HH SCHIEDAM (NL)

(74)	Representative: EP&C
	P.O. Box 3241 2280 GE Rijswijk 2280 GE Rijswijk (NL)

(54)	A DRILL STRING DRIVE TO IMPART ROTATIONAL POWER TO A TOP END OF DRILL STRING FOR DRILLING OF A WELLBORE