Measuring and testing – Borehole or drilling – Downhole test
Patent
1989-10-10
1990-11-27
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
73302, 166252, 340618, E21B 4704
Patent
active
049727052
ABSTRACT:
A method for detecting the presence of a liquid level at a monitor point along the depth of a borehole utilizes a diaphragm pressure switch for sensing the pressure of a captive air column in a measurement tube extending from the pressure switch to a predetermined point below the monitor point. In use a rising liquid level in the borehole seals an open lower end of the measurement tube from the earth atmosphere and allows the rising liquid level to compress the captive air column. In a preferred embodiment a visual signal is activated by the pressure switch when the liquid level in the borehole reaches the monitor point.
REFERENCES:
patent: 3938549 (1976-02-01), Nunneley
patent: 3969942 (1976-07-01), Hope et al.
patent: 4523465 (1985-06-01), Fasching et al.
patent: 4570718 (1986-02-01), Adams, Jr.
patent: 4747451 (1988-05-01), Adams, Jr. et al.
Liptak, B. G. "Inst. Engr. Hdbook-Process Measurment" 1982 p. 199, Chilton Book Co.
Phillips Pet. Co., ltr. to EPA of Oct. 2, 1987, Attachment V, "Device for Accomplishing Fluid Level Monitoring".
Fryer Clayton D.
Stamper Kenneth R.
Stie Kenneth E.
Wedel Michael W.
Bogatie George E.
Myracle Jerry W.
Phillips Petroleum Company
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