Improvements in or relating to pipelines for drainage

(19)

(11)

EP 2 148 010 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	24.11.2010 Bulletin 2010/47

(43)	Date of publication A2:
	27.01.2010 Bulletin 2010/04

(21)	Application number: 09175828.4

(22)	Date of filing: 02.06.2006

(51)

International Patent Classification (IPC):

E02B 11/00^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

(30)

Priority:

03.06.2005 GB 0511324

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	06252882.3 / 1728929

(71)	Applicant: The Waterflow Group plc
	Colnbrook, SL3 0DG (GB)

(72)	Inventors:
	Lusher, Mark David Colnbrook, SL3 0DG (GB) Kern, Roger John Graham Colnbrook, SL3 0DG (GB)

(74)	Representative: Lindsay, David Ian
	Murgitroyd & Company 165-169 Scotland Street Strathclyde Glasgow G5 8PL Strathclyde Glasgow G5 8PL (GB)

(54)	Improvements in or relating to pipelines for drainage

(57) A method of repairing an underground drainage pipe, conduit or passageway (12, 142), by inserting a liner (40, 144) and then launching a pipeline pig (10, 110) through the pipe which simultaneously creates multiple holes (60) through the liner (40, 144) and the pipe wall (24). The pipeline pig (10, 110) is also described having a number of cutting elements (54, 148) arranged substantially symmetrically about a central axis (52) which can be extended to drill or jet through the liner (40, 144) and wall (24). Existing conduits are thus made selectively permeable.

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