发明名称 |
Thermal drilling device |
摘要 |
A thermal drilling device which operates in a rotary or circumferentially oscillatory motion and which is particularly adapted for drilling geological formations comprises a drill body which has an interior combustion chamber with a bottom having an outlet defining a discharge nozzle. Means are provided for adding fuel components into the combustion chamber and for igniting them to generate hot gaseous products of combustion which are discharged through a nozzle slot arranged at the bottom of the combustion chamber. The nozzle slot extends diametrically of the drilling area at the bottom and slot outline or a plurality of slots arranged symmetrically relative to the longitudinal axis of the drilling body. In one embodiment the nozzle slot has a radially extending portion with the circumferential width of the slot increasing in a radial outward direction.
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申请公布号 |
US4076082(A) |
申请公布日期 |
1978.02.28 |
申请号 |
US19760734424 |
申请日期 |
1976.10.21 |
申请人 |
MESSERSCHMITT-BOLKOW-BLOHM GMBH |
发明人 |
BAUM, WERNER;MUNDING, GERMAN |
分类号 |
E21B7/14;E21C37/16;(IPC1-7):E21B7/14 |
主分类号 |
E21B7/14 |
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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