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Title: System for detecting leaks in underground fuel tanks and the like

Abstract

This patent describes a system for detecting leaks in incompletely filled liquid storage tanks, incorporating projecting fill and vent pipes, which systems are connected with a liquid withdrawal system normally isolated from the atmosphere. It comprises: means for filling the tank space above the surface of the liquid therein with a gas under a pressure greater than atmospheric pressure and maintaining a gaseous pressure on the the liquid surface; a fluid containing receptacle disposed in the tank space above the surface of the liquid; means including a pair of tubular parts, one extending to a predetermined depth of submersion in the liquid in the tank and the other extending to a predetermined depth of submersion in the fluid in the receptacle for forcing a continuous stream of bubbles of gas into the the liquid and into the the fluid whereby the resistance to gas introduction is influenced in each by the composite effect of the pressure of the gas on the surface of the liquid and the head at which the bubbles are introduced; and means for balancing the pressure required to flow the continuous stream of bubbles into the liquid against the pressure required to flow the continuous streammore » of bubbles into the fluid and indicating any differential pressure variation over a time period.« less

Inventors:
Publication Date:
OSTI Identifier:
6975563
Patent Number(s):
US 4885931; A
Application Number:
PPN: US 7-167779A
Assignee:
NOV; NOV-90-006221; EDB-90-075659
Resource Type:
Patent
Resource Relation:
Patent File Date: 14 Mar 1988
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; PETROLEUM; UNDERGROUND STORAGE; TANKS; LEAK DETECTORS; DESIGN; CONTAINERS; ENERGY SOURCES; FOSSIL FUELS; FUELS; STORAGE; 022000* - Petroleum- Transport, Handling, & Storage

Citation Formats

Horner, J A. System for detecting leaks in underground fuel tanks and the like. United States: N. p., 1989. Web.
Horner, J A. System for detecting leaks in underground fuel tanks and the like. United States.
Horner, J A. 1989. "System for detecting leaks in underground fuel tanks and the like". United States.
@article{osti_6975563,
title = {System for detecting leaks in underground fuel tanks and the like},
author = {Horner, J A},
abstractNote = {This patent describes a system for detecting leaks in incompletely filled liquid storage tanks, incorporating projecting fill and vent pipes, which systems are connected with a liquid withdrawal system normally isolated from the atmosphere. It comprises: means for filling the tank space above the surface of the liquid therein with a gas under a pressure greater than atmospheric pressure and maintaining a gaseous pressure on the the liquid surface; a fluid containing receptacle disposed in the tank space above the surface of the liquid; means including a pair of tubular parts, one extending to a predetermined depth of submersion in the liquid in the tank and the other extending to a predetermined depth of submersion in the fluid in the receptacle for forcing a continuous stream of bubbles of gas into the the liquid and into the the fluid whereby the resistance to gas introduction is influenced in each by the composite effect of the pressure of the gas on the surface of the liquid and the head at which the bubbles are introduced; and means for balancing the pressure required to flow the continuous stream of bubbles into the liquid against the pressure required to flow the continuous stream of bubbles into the fluid and indicating any differential pressure variation over a time period.},
doi = {},
url = {https://www.osti.gov/biblio/6975563}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 12 00:00:00 EST 1989},
month = {Tue Dec 12 00:00:00 EST 1989}
}