Method and apparatus for determining fluid level in oil wells

Details Method and apparatus for determining fluid level in oil wells Method and apparatus for determining fluid level in oil wells

1997-04-14

1999-02-09

Noori, Max H.

Measuring and testing

Liquid level or depth gauge

Exploring tube

73290R, 73302, G01F 2322

Patent

active

058680292

ABSTRACT:
A method and apparatus for continuously monitoring fluid level in an oil well, by measuring changes in the weight of the oil well tubing which result from changes in the buoyancy of the tubing caused by the rise and fall of fluid level within the oil well. In the apparatus of the invention, a transducer is either affixed to the downhole tubing of the oil well, or alternatively, is affixed to the drive head support structure of a well having a progressive cavity well pump. The transducer continuously senses changes in the weight of the tubing as the buoyancy of the tubing changes in proportion to the rise and fall of fluid level within the well. The transducer is preferably connected to a control unit which, in turn, is connected to the pump motor and which functions to automatically control the pump motor as a function of fluid level within the well.

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