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. 06, 1981
Filed:
Feb. 28, 1980
Reynaldo Calderon, Houston, TX (US);
Texaco Inc., White Plains, NY (US);
Abstract
Method for assembling a self-cleaning helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are disclosed. The basic method comprises (1) attaching a helical spring sand screen to the lower end of a production tube for being lowered into a well to the liquid level for producing sand-free liquid from the production tube, (2) mounting a spring biased valve means on the production tube, (3) providing valve means for the production tube for controlling the outlet thereof, and (4) connecting a source of high pressure liquid to the spring biased valve means for storing energy in its spring, for expanding its helical spring sand screen, and for ejecting liquid into its helical spring sand screen for expansion and cleaning thereof. The resultant self-cleaning helical spring sand screen is so formed that upon ceasing of flow of high pressure liquid, the stored energy in another spring contracts the helical spring sand screen for restoring production of sand-free oil from the production tube. A second method which forms and assembles a second modification is disclosed.