Measuring and testing – Borehole or drilling – Downhole test
Patent
1989-12-15
1993-06-08
Williams, Hezron E.
Measuring and testing
Borehole or drilling
Downhole test
7386178, 32420725, 324174, E21B 4710
Patent
active
052169243
ABSTRACT:
A passive flowmeter for determining the flow rate and the direction of flow of a fluid in a well comprises a magnetic generator (29) suitable for being rotated about an axis (RR) and including at least one north pole (N) and at least one south pole (S) lying flush with a first plane (P1) perpendicular to the axis (RR). The flowmeter also includes a magnetic detector (33) constituted by a magnetic core (34) supporting a coil (40) and extended by two magnetic terminal portions (36, 38) having spaced apart end surfaces which are disposed substantially flush with a second plane (P2) facing said first plane. The end surfaces of a terminal portion have areas which are different from the end surfaces of the other terminal portion. The poles of the magnetic generator (29) are angularly spaced about the axis (RR) by an angle such that the variations of magnetic flux generated through the coil (40) by rotation of the magnetic generator (29) have a cycle ratio which is other than unity.
REFERENCES:
patent: 2728893 (1955-12-01), Bartelink
patent: 3036460 (1962-05-01), White et al.
patent: 3162042 (1964-12-01), Hart
patent: 3210658 (1965-10-01), Stevens
patent: 3433070 (1969-03-01), Grimaldi
patent: 3772916 (1973-11-01), Booth et al.
patent: 3905226 (1975-09-01), Nicolas
patent: 3930201 (1975-12-01), Ackermann et al.
patent: 3934467 (1976-01-01), Nicolas
patent: 4011757 (1977-03-01), Baatz
patent: 4140013 (1979-02-01), Hunger
patent: 4164866 (1979-08-01), Mitchell et al.
patent: 4308755 (1982-01-01), Millar et al.
patent: 4566317 (1986-01-01), Shakra
patent: 4646085 (1987-02-01), Mathis
patent: 4754642 (1988-07-01), Miyairi et al.
Brock Michael
Garrana Henry N.
Schlumberger Technology Corporation
Walker Darcell
Williams Hezron E.
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