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:
Apr. 04, 1995
Filed:
Jan. 13, 1994
Phillip T Lalande, LaFayette, LA (US);
H Madeley, Jr, LaFayette, LA (US);
Other;
Abstract
A reverse circulation procedure is set forth in which selected shoes are attached to a reverse circulation tool. Debris, junk and other trash accumulating in a well borehole is captured and removed. The circulation delivers fluid flow in the annular space downwardly at the bottom of the tool of the present disclosure which is directed in the vicinity of a shoe affixed to the lower end. Trash or debris is captured by this process. In one instance, the trash is captured in an elongate container below the reverse circulation tool. In another instance, the trash is collected within the tool itself. The tool has a fluid flow path through an inner tube which is selectively perforated and which directs flow upwardly to one or more deflectors to assure that junk or trash does not flow through the tool.