发明名称 |
SYSTEM, METHOD AND CUTTERHEAD FOR DRY FULL-AREA DRILLING |
摘要 |
In a method for use in dry, rotary, crushing full-area drilling, use is made of suction air alone for removing cuttings produced during drillings. To carry out the method, two suction nozzles (13) are arranged on the underside of a cutterhead (1), These nozzles together have a substantially diametrical extent and the length of a radius on the cutterhead and are provided with suction intakes (14A) in the vicinity of the periphery of the cutterhead. The suction intakes (14A) are connectible a common suction channel (11) in the drill string (6) of the cutterhead. The suction channel (11) has substantially constant diameter.
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申请公布号 |
CA2182605(A1) |
申请公布日期 |
1996.05.09 |
申请号 |
CA19952182605 |
申请日期 |
1995.02.01 |
申请人 |
KROLL-DISAB AB;SANDVIK AB |
发明人 |
HAUGEN, KARL THORBJOERN;LOEVGREN, GERT AXEL;BROLUND, STIG- KE;KALLVIK, ROLAND |
分类号 |
E21B10/28;E21B10/60;E21B17/10;E21B21/00;E21B21/16;E21D9/10;E21D9/13;(IPC1-7):E21B21/00 |
主分类号 |
E21B10/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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