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Class Information
Number: 166/110
Name: Wells > With eduction pump or plunger > Receptacles > Lateral port always below piston and used in well
Description: Devices in which there is an opening through the side wall of the container below the lowest position of the pump or plunger piston providing for fluid flow through the opening while the container is in the well.

Patents under this class:

Patent Number Title Of Patent Date Issued
8328539 Submersible pump motor protector Dec. 11, 2012
7980314 Gas restrictor for pump Jul. 19, 2011
7793728 Gas lift plunger arrangement Sep. 14, 2010
7438125 Variable orifice bypass plunger Oct. 21, 2008
7314081 Pumping from two levels of a pool of production fluid, and one way valve therefore Jan. 1, 2008
6907926 Open well plunger-actuated gas lift valve and method of use Jun. 21, 2005
6725916 Plunger with flow passage and improved stopper Apr. 27, 2004
6145590 Device for removing sand from pump plungers Nov. 14, 2000
6116341 Water injection pressurizer Sep. 12, 2000
5899270 Side intake valve assembly May. 4, 1999
5823265 Well completion system with well control valve Oct. 20, 1998
5797452 Double-acting, deep-well fluid extraction pump Aug. 25, 1998
4924940 Downhole cleanout tool May. 15, 1990
4721156 Well clean out apparatus Jan. 26, 1988
4291763 Dispenser for oil well treating chemicals Sep. 29, 1981

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