| 发明名称 | Logging tool | ||
| 摘要 | The invention relates to a logging tool (1) for determining properties of a fluid (2) surrounding the tool arranged downhole in a casing (3) comprising a wall (4) and having a longitudinal extension. The logging tool has a substantially longitudinal cylindrical shape with a longitudinal axis and, when seen in cross-section, a periphery (5). Moreover, the logging tool comprises a plurality of electrodes (6) arranged spaced around the longitudinal axis in the periphery of the tool so that the fluid flows between the electrodes and the casing wall and a means for measuring the capacitance between two electrodes in all possible combinations giving n*(n−1)/2 capacitance measurements for n electrodes. | ||
| 申请公布号 | US8823379(B2) | 申请公布日期 | 2014.09.02 |
| 申请号 | US200912609732 | 申请日期 | 2009.10.30 |
| 申请人 | Welltec A/S | 发明人 | Hallundbaek Jørgen;Kjaersgaard-Rasmussen Jimmy |
| 分类号 | G01V3/18 | 主分类号 | G01V3/18 |
| 代理机构 | Cozen O'Connor | 代理人 | Cozen O'Connor |
| 主权项 | 1. A logging tool for determining properties of a fluid surrounding the tool arranged downhole in a casing comprising a wall and having a longitudinal extension, the logging tool having a substantially longitudinal cylindrical shape with a longitudinal axis and, when seen in cross-section, a periphery, wherein the logging tool comprises: a plurality of electrodes arranged spaced around the longitudinal axis in the periphery of the tool so that the fluid flows between the electrodes and the casing wall, wherein the tool is free of grounded electrical means or electrical means having a fixed potential arranged as guards between the electrodes; and the logging tool configured to measure the capacitance of the fluid surrounding the outside of the tool between two electrodes in all combinations giving n*(n−1)/2 capacitance measurements for n electrodes. | ||
| 地址 | Allerod DK | ||