| This is a method of wire-line core drilling in planned directions with very high accuracy. Drill head for the directional core drilling is attached to conventional wire-line drilling equipments. |
| Characteristics of this method |
・Ease of operation Conventional wire-line method and conventional equipment are used without modification. Fixing the direction of drilling can be done easily by electronic multishot survey devices. ・Continuous coring Continuous coring is possible for both conventional wireline drilling and directional drilling. ・High drilling efficiency Directional drilling head is equipped with wire-line function, and directional drilling is done with high efficiency. ・Effective for diverse geologic conditions Directional core drilling can be carried out in various types of geologic conditions soft rocks such as mudstone and sandstone, and in hard rocks such as granitic and metamorphic rocks by exchanging the bits. ・Low cost The cost for directional drilling is not very different from normal wire-line drilling.. |
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