Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Including borehole fluid investigation
Patent
1990-04-20
1990-12-25
Lobo, Ian J.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Including borehole fluid investigation
324341, 73153, G01V 318
Patent
active
049806424
ABSTRACT:
The present invention is directed to a system, apparatus and methods for determining influx of formation fluids into a well borehole during drilling. The methods of the present invention comprise determining the dielectric constant and/or conductivity of the fluid in the annulus about a drill pipe in a well borehole, comparing the determined dielectric constant and/or conductivity to a reference value and inferring that influx has occurred when the difference between the dielectric constant and/or conductivity and the reference value is greater than a predetermined limit. The dielectric constant and/or conductivity is determined by transmitting electromagnetic energy between about 10 KHz and about 10 GHz through the fluid in the annulus about the drill pipe from a transmitter located in the drill pipe section, receiving a portion of that energy which has travelled through the fluid but not through the surrounding formation in a receiver located in the drill pipe, and determining the dielectric constant and/or conductivity as a function of at least one of the phase and the amplitude of the received energy.
REFERENCES:
patent: 3776032 (1973-12-01), Vogel
patent: 3982176 (1976-09-01), Meador
patent: 3993944 (1976-11-01), Meador et al.
patent: 4009434 (1977-02-01), McKinlay et al.
patent: 4012689 (1977-03-01), Cox et al.
patent: 4278941 (1981-07-01), Freedman
patent: 4319191 (1982-03-01), Meador et al.
patent: 4360778 (1982-11-01), Freedman
patent: 4492865 (1985-01-01), Murphy et al.
patent: 4536713 (1985-08-01), Davis et al.
patent: 4571693 (1986-02-01), Birchak et al.
patent: 4626785 (1986-12-01), Hagiwara
patent: 4733232 (1988-03-01), Grosso et al.
patent: 4733233 (1988-03-01), Grosso
patent: 4891916 (1989-06-01), Meador et al.
L. D. Maus et al., Article Entitled, "Instrumentation Requirements for Kick Detection in Deep Water", Published in Aug. 1979 at pp. 1029-1034 of vol. 31, of The Journal of Petroleum Technology.
M. H. Westerheim, Paper Entitled, "Heave Compensated Kick and Loss Circulation Detector", presented at the 1979 Offshore Technology Conference, Published at p. 41 of the Proceedings Thereof.
D. I. Wilkie et al., Article entitled, "Dome's Kick Tolerance Formula for Safe Beaufort Sea Drilling", Published in Mar. 1981, at p. 33 of Ocean Industry.
Baroid Technology Inc.
Lobo Ian J.
LandOfFree
Detection of influx of fluids invading a borehole does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Detection of influx of fluids invading a borehole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of influx of fluids invading a borehole will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1165496