Apparatus for protecting downhole instruments from torsional and

Details Apparatus for protecting downhole instruments from torsional and Apparatus for protecting downhole instruments from torsional and

1974-11-01

1976-12-07

Blunk, Evon C.

Measuring and testing

Borehole or drilling

Downhole test

308 6A, E21B 4700

Patent

active

039954790

ABSTRACT:
In the representative embodiment of the invention herein, delicate instruments and electronics circuitry used for obtaining downhole measurements are mounted on an elongated support or chassis which is removably disposed within a tubular housing and uniquely restrained from movement in response to shocks and vibrations which might otherwise damage or destroy the components. In this preferred arrangement, at least one set of angularly-disposed transverse rollers of a somewhat-resilient material is mounted on the chassis and respectively arranged for being slightly compressed and rollingly engaged with the internal wall of the tubular enclosure as the chassis is inserted into the enclosure. Although the rollers enable the chassis to be readily moved into and out of its protective enclosure, the frictional restraint between the compressed rollers and the enclosure walls will be effective for reliably restraining the chassis and its components from both lateral and torsional movements in response to shocks and vibrations of a potentially-destructive magnitude.

REFERENCES:
patent: 1898074 (1933-02-01), Bailey
patent: 1913365 (1933-06-01), Bailey
patent: 1923328 (1933-08-01), Reed
patent: 2198720 (1940-04-01), Edgecomb et al.
patent: 2776564 (1957-01-01), Montgomery et al.
patent: 3789511 (1974-02-01), Groom et al.
patent: 3827294 (1974-08-01), Anderson

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