The Prevention of Bit Balling by Electro-Osmosis II

本研究的目的是进一步开展这项工作 这是以前在减少比特方面已经实现的， 造球，并在钻井时将机械钻速提高一倍 在页岩中，通过施加几伏的负电位， 导致润滑水产生的钻头 在钻头-页岩界面处的膜。到目前为止， 已经用牙轮钻头进行了小规模的试验。在 这项工作将确定，如果类似的良好结果， 在更大的规模上，用刮刀钻头以及 牙轮钻头，并且在存在含粘土的 钻井泥浆该项目将得到配套支持 工业资金。

The objective of this research is to carry further the work that has been previously accomplished in reducing bit balling, and to double the rate of penetration while drilling in shales by applying a negative potential of a few volts to the bit which causes the development of a lubricating water film at the bit-shale interface. Experiments so far have been carried out with roller-cone bits at small scale. In this work it will be determined if similar good results can be obtained at larger scale, with drag bits as well as with roller-cone bits, and in the presence of clay-containing drilling muds. The project will be supported by matching funds from industry.