Wells – Processes – With indicating – testing – measuring or locating
Patent
1995-01-04
1996-05-28
Tsay, Frank S.
Wells
Processes
With indicating, testing, measuring or locating
73 38, G01N 1508, E21B 4700
Patent
active
055202489
ABSTRACT:
An earthen material hydraulic conductivity determining apparatus includes, a) a semipermeable membrane having a fore earthen material bearing surface and an opposing rear liquid receiving surface; b) a pump in fluid communication with the semipermeable membrane rear surface, the pump being capable of delivering liquid to the membrane rear surface at a plurality of selected variable flow rates or at a plurality of selected variable pressures; c) a liquid reservoir in fluid communication with the pump, the liquid reservoir retaining a liquid for pumping to the membrane rear surface; and d) a pressure sensor in fluid communication with the membrane rear surface to measure pressure of liquid delivered to the membrane by the pump. Preferably, the pump comprises a pair of longitudinally opposed and aligned syringes which are operable to simultaneously fill one syringe while emptying the other. Methods of determining the hydraulic conductivity of earthen material are also disclosed.
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Honeycutt Thomas K.
Hubbell Joel M.
Sisson James B.
Lockhead Idaho Technologies Company
Tsay Frank S.
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