| 河南铝土矿勘探高肋骨PDC 钻头双管钻探工艺探讨 |
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| 引用本文： | 潘广灿.河南铝土矿勘探高肋骨PDC 钻头双管钻探工艺探讨[J].地质与勘探,2011,47(5):924-928. |
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| 作者姓名： | 潘广灿 |
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| 作者单位： | 河南省有色金属地质矿产局第四地质大队,河南郑州 |
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| 摘 要： | 针对河南铝土矿勘探的钻探工艺进行探讨。从岩性及钻探工艺两方面分析在河南铝土矿勘探时常规钻探工艺易出现卡钻、岩心采取率低、钻进效率低的原因,岩性方面:河南铝土矿勘探过程中常遇的二叠系、石炭系地层多属软-中硬岩,易遇水膨胀、孔壁不稳定,钻杆、钻具易粘附孔壁导致泥浆排泄不畅;钻探工艺方面:普通合金钻探工艺岩心采取率低、钻速低,绳索取心钻探工艺岩心采取率高、钻杆钻具与孔壁间隙小,普通金刚石双管钻探工艺岩心采取率高、钻具与孔壁间隙小,普通PDC钻头钻探工艺岩心采取率高、钻具与孔壁间隙仍然不够大,采用常规钻探工艺常发生钻具或钻杆粘附孔壁、泥浆排泄不畅,易产生的卡钻事故而降低钻探效率。高肋骨PDC钻头可有效增大钻具与孔壁间隙、双管取心可有效提高岩心采取率,采用高肋骨PDC钻头双管钻探较好地解决了河南铝土矿勘探时卡钻、岩心采取率低、钻探效率低的问题。因而以为在河南铝土矿勘探中适宜采用PDC钻头双管钻探工艺。
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| 关 键 词： | PDC 钻头 复合层 钻探 |
| 收稿时间： | 2010/12/22 0:00:00 |
| 修稿时间： | 2011/5/28 0:00:00 |
On Drilling Technology Using High-Rib PDC Bit and Double-Pipe in
Bauxite Exploration of Henan Province |
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| PAN Guang-can.On Drilling Technology Using High-Rib PDC Bit and Double-Pipe in
Bauxite Exploration of Henan Province[J].Geology and Prospecting,2011,47(5):924-928. |
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| Authors: | PAN Guang-can |
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| Institution: | NO. 4 Geological Brigade of Henan Provincial Non-femous Metals Geological and
Mineral Resources Bureau, Zhengzhou,Henan |
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| Abstract: | Abstract:This paper studied the drilling techniques in bauxite prospecting of Henan Province. Reasons for drilling tool sticking, inefficient core drilling and obtaining were analyzed from aspects of lithology and drilling technique. The Permian and Carboniferous system encountered in the drilling process are mainly soft - mid-hard rocks, which are often water-expendable, adhere to the hole-wall and cause blocking and result in unstable hole walls. Drilling with general alloy bit has a low recovery of core and low speed. Drilling using rope and diamond double-pipe is efficient in core extraction, with small gap between the hole wall and drilling pipe and tools. Drilling using PDC aiguilles has a high efficiency in core recovery, but the gap is not wide enough. In routine drilling techniques, drilling pipe and tools often adhere to the hole wall, thus sticking accidents may happen and slurry cannot drain smoothly, which reduces the efficiency. Using high-rib PDC aiguilles double-pipe can widen the gap between hole-wall and drilling pipe and tools, and double-pipe could enhance efficiency of core recovery. The drilling technique using high-rib PDC double-pipe can solve all the problems mentioned above. It is concluded that for the bauxite prospecting in Henan, the drilling technique using high-rib PDC double-pipe is appropriate. |
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| Keywords: | PDC bit drilling bauxite exploration Henan |
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