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:
May. 10, 1994
Filed:
Jun. 17, 1993
Donald H Douglas, Clinton, MS (US);
Stafford S Cooper, Vicksburg, MS (US);
Philip G Malone, Vicksburg, MS (US);
U.S. Army Corps of Engineers as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A well installation preform for locating and dispensing granular materials nto a bore hole around the screen of a well casing is disclosed. A cylindrical sleeve containing a liner is assembled about the screen end of the well casing. The space between the sleeve and the well casing is filled with an ordered layer of granular material including a filter material adjacent the screen, a sealing material above the filter material and the screen and a quantity of filler material above the sealing material. The lower end of the sleeve is blocked while the preform is lowered into the well. The sleeve is thereafter removed whereby the liner is everted and the granular material is uniformly dispensed about the well casing in the bore hole. The sealing material forms a seal above the filter material for establishing an isolated filtration zone about the screen. A method of constructing the well using the preform and the resulting well structure is also disclosed.