Charles D Short

US Patent:

43900615, Jun 28, 1983

Filed:

Dec 31, 1980

Appl. No.:

6/221534

Inventors:

Charles Short - Humble TX

International Classification:

E21B 4300
E21B 4334
F04F 512
F04F 544

US Classification:

166 53

Abstract:

Apparatus for production of liquid from wells such as petroleum wells includes well pipe that extends from the surface downwardly to the level of liquid standing within the well. A string of production tubing is positioned within the well pipe with the annulus between the production tubing and well pipe defining gas supply means that is interconnected with a source of compressed gas. At the lower portion of the production tubing is located aspirator means having a gas injection element defining a gas jet passage which is in communication with the gas supply annulus. The gas injection element is oriented to direct an upwardly flowing jet of pressurized gas which is directed into the lower restricted portion of a venturi that extends upwardly from the aspirator means into the production tubing. The aspirator means also defines a liquid flow passage that is in communication with liquid standing within the well. The liquid flow passage means and the gas injection jet have confluence within the restricted portion of the venturi whereby the jet of compressed gas aspirates the liquid and transports the liquid to the surface for ultimate handling.