Sonic fluid level control apparatus. [prevention of cavitation]
Patent
·
OSTI ID:7346021
Pump-off control apparatus is claimed for preventing cavitation of a sub-surface pump which provides artificial lift for fluid produced from a fluid bearing strata located downhole in a borehole. A sound wave is focused downhole and travels down the casing annulus where it strikes the liquid surface and rebounds to a receiver located near the well head. The time lapse of the traveling wave is used to measure the relative location of the liquid surface relative to the pump inlet, thereby enabling the control apparatus to shut-in a well before it can encounter a pump-off condition which can cause fluid pounding. 10 claims, 6 drawing figures.
- Assignee:
- TIC; ERA-01-025322; EDB-76-073492
- Patent Number(s):
- US 3965983
- OSTI ID:
- 7346021
- Resource Relation:
- Patent File Date: Filed date 13 Dec 1974
- Country of Publication:
- United States
- Language:
- English
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