Measuring and testing – Borehole or drilling – Downhole test
Patent
1992-08-26
1996-03-19
Chilcot, Jr., Richard E.
Measuring and testing
Borehole or drilling
Downhole test
73734, 338 40, E21B 2108
Patent
active
054995337
ABSTRACT:
The apparatus disclosed is a type of downhole pressure gauge to be used to measure and record pressure information about oil and gas wells. The apparatus measures fluctuations in pressure by means of a mechanical pressure sensitive device, such as a Bourdon tube, and records and stores this information by converting mechanical movement, associated with pressure changes as detected by the mechanical pressure sensitive device, into corresponding voltage changes across a potentiometer which are stored in an electronic memory board. The change in voltage over time corresponds to the change in well pressure over time, thereby providing important information to the well operator. Also disclosed is a method for measuring well pressure by means of combining a mechanical pressure sensitive device with an electrical system and an electronic memory board for storing the measurements. Also disclosed is a kit, whereby an existing downhole mechanical pressure gauge can be converted to a mechanical/electrical combination by the replacement of certain parts.
REFERENCES:
patent: 2379996 (1945-07-01), Silverman
patent: 2932807 (1960-04-01), Bowins
patent: 3145359 (1964-08-01), Parkinson
patent: 4157659 (1979-06-01), Murdock
patent: 4355365 (1982-10-01), McCracken et al.
Miller Mark
Miller Thomas W.
Chilcot Jr. Richard E.
Felber Joseph L.
Wargo Kenneth W.
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