Apparatus and method for detecting and recovering immiscible liquids of different densities
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United States of America Patent
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Dec 12, 1995
Grant Date -
N/A
app pub date -
Feb 14, 1994
filing date -
Feb 14, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A float (26) resides at an interface (21) between a first liquid (20) floating on another liquid (22). A pneumatic pressure sensor (32) senses back-pressure at the float (26) via a conduit (30) and a bubbler hole, or pressure sensing point (28) and relays the information to a recorder (37). Also, a combination detection and recovery device employs the above detection device coupled with a floating liquid skimming device. The recovery unit (90) of the skimming device has a bubbler hole (168) connected to pressure sensor (32) via conduit (30). The pressure sensor (32) is then connected to a pump (88) via another conduit (38). When the pressure at the bubbler hole (168) reaches a predetermined value corresponding to a given fluid thickness, the sensor (32) activates the pump (88) which moves the floating liquid (20) from the recovery unit (90) to a fluid receptacle (102). The apparatus is adapted for use inside of well casings (50) as well as for liquids (22) with larger surface areas, such as fluid storage tanks, lakes, and streams. The float (97) can be constructed employing a semipermeable membrane (110) which allows one liquid to enter and excludes the other.
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