Perforation purging tool

Details Perforation purging tool Perforation purging tool

1994-08-05

1995-12-12

Neuder, William P.

Wells

Processes

Cleaning or unloading well

166222, E21B 3700

Patent

active

054741300

ABSTRACT:
A well casing cleaning tool includes a tubular tool body that has a central axial passageway and upper and lower sets of jet ports through the tool body wall. The upper jet ports are angled upward and the lower jet ports are angled downward. The outside diameter of the cleaning tool is slightly smaller than the inside diameter of the well casing to be cleaned. When wash fluid is pumped through the jet ports of the cleaning tool, an area of reduced pressure forms between the upper and lower sets of jet ports. This area of reduced pressure aids in the cleaning of the perforation zone of a well. Bypass passages from above the upper set of jet ports to below the lower set of jet ports prevent a pressure difference between the two sets of jet ports.

REFERENCES:
patent: 5195585 (1993-03-01), Clemens et al.

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