发明名称 |
ГОЛОВКА ДЛЯ УДАРНОГО БУРЕНИЯ |
摘要 |
Device and method for drilling into geological formations. The device comprises: a rotatable body; drilling cutters arranged on an axial end surface of the rotatable body; a percussion part, which is parallel to the rotating axis reciprocatable arranged on said body; and percussion cutters arranged on an axial end surface of the percussion part. The method comprises the steps of: bringing a percussion part with a percussive movement in contact with the formation in order to crack at least a part of the formation, and scraping the cracked parts of the formation with a drilling part. |
申请公布号 |
RU2004111802(A) |
申请公布日期 |
2005.03.27 |
申请号 |
RU20040111802 |
申请日期 |
2002.09.19 |
申请人 |
ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) |
发明人 |
КРИСЕЛС Петрус Корнелис (NL);ЗИЙСЛИНГ Дьюрре Ханс (NL) |
分类号 |
E21B7/00;E21B10/40 |
主分类号 |
E21B7/00 |
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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