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:
Sep. 06, 1983
Filed:
Sep. 10, 1981
Edward T Wood, Kingwood, TX (US);
Robert Snyder, Kingwood, TX (US);
William C Larson, Bloomington, MN (US);
Donald W Dareing, Houston, TX (US);
Other;
Abstract
A method and the necessary equipment to form horizontal cased and perforated drainholes for an underground, in situ leach mining operation. After a vertical hole has been formed and cased in the earth, horizontal drainholes are to be drilled from below its casing. The depth and thickness of the ore body which is to be recovered is determined. Following this, the proper whipstock orientation is computed and the horizontal drainhole is whipstocked and drilled from above the ore bed into it. A flexible casing, such as Coflexip pipe, is used to case the drainholes. Perforations or slots are provided for in these casings before they are put in the earth. A special retrievable cement plug, basket, and one-way valve are used to control and direct the flow of cement to the volume between the outside of the juncture at the casings.