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:
Oct. 04, 1983
Filed:
Dec. 14, 1981
Joseph T Hamrick, Roanoke, VA (US);
Well-Pack Systems, Inc., Fort Worth, TX (US);
Abstract
A water pump located in a cased borehole has a lower inlet and an upper outlet which is coupled to a pipe means that extends to the surface. At the surface, the borehole is coupled to a water delivery pipe and the pipe means is coupled to a conduit having a sand dump valve. An opening is formed through the pipe means near the outlet of the pump. A packer is located between the inlet of the pump and said opening. A sandtrap is located in said opening for trapping sand flowing with water from the pump outlet through the opening and upward through the annulus between the pipe means and borehole wall. In order to remove the sand from the sandtrap, the sand dump valve is opened to allow sand trapped by the sandtrap to flow upward with water through said pipe means and to be discharged through said conduit means.