公开(公告)号：US11021950B2

公开(公告)日：2021-06-01

申请号：US16432953

申请日：2019-06-06

申请人： Probe Technology Services, Inc.

发明人： Kee Siu ,  Mark Lloyd ,  Johnathan Miko ,  Angel Mendoza

IPC分类号： G01V3/18 ,  E21B49/08 ,  G01V3/20 ,  G01N27/22 ,  G01N27/07 ,  E21B47/07 ,  G01N33/28 ,  G01N27/06 ,  G01N27/02 ,  G01N27/74 ,  G01V3/38 ,  G01V3/30

摘要： A sensor comprising three electrodes forming two electrode pairs, each pair having a gap between the electrodes, is disclosed. An electrically insulating layer is disposed in the gap of one electrode pair. The sensor may include a RC oscillator circuit connected to the electrode pair having the insulating layer such that the electrode pair contributes to the capacitance of the circuit. The sensor may include a power supply connected to the other electrode pair to provide a voltage across and current through material in the pair's gap. The sensor may be disposed in a borehole to allow borehole fluid to enter the gaps and the RC oscillator circuit and power supply may be operated to provide a measure of capacitance and resistance characteristics of the borehole fluid.