The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1988
Filed:
Aug. 19, 1987
Applicant:
Inventor:
William D Rumbaugh, Carrollton, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166312 ; 166331 ;
Abstract
A system for cleaning perforations in a well bore by surging formation fluid through the perforations. A wireline retrievable well tool is installed in the well bore above the perforations to establish a fluid barrier which will divide the well bore into a first fluid pressure zone and a second fluid pressure zone. The well tool includes a flow path closure device which will suddenly open when the difference in pressure between the first zone and the second zone exceeds a preselected value. The sudden opening of the closure device results in a surge of fluid flow from the downhole formation which cleans the perforations.