Downhole pressure and/or temperature gauges

Details Downhole pressure and/or temperature gauges Downhole pressure and/or temperature gauges

1987-08-18

1989-02-21

LaRoche, Eugene R.

Measuring and testing

Borehole or drilling

Downhole test

73733, 73152, E21B 4700

Patent

active

048054488

ABSTRACT:
A pressure or temperature gauge includes a Bourdon tube which is coupled via a shaft to transmit rotation to a stylus carried by the shaft which makes a record on a cylindrical chart which moves axially of the shaft at a constant rate. The shaft is divided into two sections which are joined together by a flexible coupling; the upper section of the shaft is mounted for angular displacement about its longitudinal axis by the thrust bearing. One section has an integrally formed axial extension which is received in a recess in the facing end portion of the other shaft section. This construction of the stylus shaft allows the angular motion produced by the coiling and uncoiling of the Bourdon type generally through an angle less than 360.degree. to be faithfully transmitted without any axial motion of the shaft which would give rise to erroneous recording of pressure or temperature readings in relation to time.

REFERENCES:
patent: 1864507 (1932-06-01), Pineau
patent: 2343079 (1944-02-01), Pickwell
patent: 2590313 (1952-03-01), Hartmann
patent: 2979925 (1961-04-01), Hungerfords, Jr.
patent: 3068666 (1962-12-01), Sabadash
patent: 3073135 (1963-01-01), Wood
patent: 3633414 (1972-01-01), Field
patent: 3744307 (1973-07-01), Harper et al.
patent: 3810387 (1974-05-01), Stancliff
patent: 4203305 (1980-05-01), Williams
patent: 4207755 (1980-06-01), Weible

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