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Class Information
Number: 166/56
Name: Wells > Screen and outside cleaning pipe
Description: Devices under the class definition comprising a well screen combined with a pipe located outside of the screen for handling fluid to clean the screen or the bed of earth or filter material outside of the screen.

Patents under this class:

Patent Number Title Of Patent Date Issued
7934555 Multiple zone isolation method May. 3, 2011
7854257 Mechanically coupled screen and method Dec. 21, 2010
7814973 Sand control screen assembly and method for use of same Oct. 19, 2010
7802622 Cable-protective pipe section, a method of protectively arranging at least one cable on the outside of the pipe section and use of a device for protecting the cable Sep. 28, 2010
7793716 Apparatus and methods for limiting debris flow back into an underground base pipe of an injection well Sep. 14, 2010
7069657 Method to reduce the width of a slot in a pipe or tube Jul. 4, 2006
5842516 Erosion-resistant inserts for fluid outlets in a well tool and method for installing same Dec. 1, 1998
5411088 Filter with gas separator for electric setting tool May. 2, 1995
5310000 Foil wrapped base pipe for sand control May. 10, 1994
4526230 Double walled screen-filter with perforated joints Jul. 2, 1985

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