Magnetic motion coupling for well logging instruments

Details Magnetic motion coupling for well logging instruments Magnetic motion coupling for well logging instruments

1997-09-26

1999-06-29

Barlow, John

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

367 25, 464 29, 181102, 166100, 417420, G01V 140

Patent

active

059177748

ABSTRACT:
A magnetic coupling for substantially synchronously transferring linear motion through a non magnetic barrier from a first movable element to a second movable element. The coupling comprises magnets disposed at spaced apart locations along the first element. The magnets each have a magnetization direction substantially perpendicular to a direction of motion of the first element along the non magnetic barrier. The coupling includes magnets disposed at spaced apart locations along the second element at locations corresponding to locations of the magnets op the first element. Each of the magnets on the second element has a magnetization direction inclined at an oblique angle with respect to the magnetization direction of the corresponding magnet so as to capture magnetic flux from the magnets on the first element when either of the elements is moved along the barrier.

REFERENCES:
patent: 4120618 (1978-10-01), Klaus
patent: 4614250 (1986-09-01), Panetta et al.
patent: 4715440 (1987-12-01), Boxell et al.
patent: 5209699 (1993-05-01), Hashimoto et al.
patent: 5528556 (1996-06-01), Seeman et al.

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