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公开(公告)号：EP3247862A1
公开(公告)日：2017-11-29
申请号：EP16739873.4
申请日：2016-01-25
发明人： KLEUTERS, Nikolaus , PRETORIUS, Daniel Coenraad , JORDAAN, Barend Jacobus , GERMISHUYS, Louis , GOODWIN, Nicolaas Bodenstein , SHEPPARD, Gareth Robert
CPC分类号： E21B7/28 , E21B4/16 , E21B4/18 , E21B10/32 , E21B12/06 , E21B15/003 , E21B17/1078 , E21B19/008 , E21B21/00 , E21B27/00 , E21D1/03 , E21D1/06 , E21D1/08 , E21D5/04
摘要： A shaft enlargement arrangement for a boring system is provided, the shaft enlargement arrangement comprising a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head; and a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head to bore a leading hole as the boring system proceeds to bore downwardly. In an embodiment, the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements.
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公开(公告)号：EP3247862B1
公开(公告)日：2019-10-09
申请号：EP16739873.4
申请日：2016-01-25
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公开(公告)号：EP3516170A1
公开(公告)日：2019-07-31
申请号：EP17852514.3
申请日：2017-09-21
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公开(公告)号：EP3247862A4
公开(公告)日：2017-12-06
申请号：EP16739873
申请日：2016-01-25
发明人： KLEUTERS NIKOLAUS , PRETORIUS DANIEL COENRAAD , JORDAAN BAREND JACOBUS , GERMISHUYS LOUIS , GOODWIN NICOLAAS BODENSTEIN , SHEPPARD GARETH ROBERT
CPC分类号： E21B7/28 , E21B4/16 , E21B4/18 , E21B10/32 , E21B12/06 , E21B15/003 , E21B17/1078 , E21B19/008 , E21B21/00 , E21B27/00 , E21D1/03 , E21D1/06 , E21D1/08 , E21D5/04
摘要： A shaft enlargement arrangement for a boring system is provided, the shaft enlargement arrangement comprising a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head; and a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head to bore a leading hole as the boring system proceeds to bore downwardly. In an embodiment, the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements.
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