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:
Nov. 09, 2010
Filed:
Dec. 29, 2008
Thomas J Oothoudt, Little Falls, MN (US);
Thomas J Oothoudt, Little Falls, MN (US);
Longyear TM, Inc., South Jordan, UT (US);
Abstract
Slough removal assemblies and methods for removing slough from boreholes are described. A slough removal assembly containing a slough barrel is lowered into a borehole having excess slough, driven into the slough to cause the slough to enter the slough barrel, and the slough removal assembly is then removed along with the excess slough. The slough removal assembly may contain a shoe coupled to the slough barrel and configured to be driven into the slough, a retainer positioned between the shoe and the slough barrel to retain slough inside of the slough barrel, and a driving mechanism (such as a drop hammer) to drive the slough assembly into the slough. The slough removal assembly may be coupled either to a wireline system or to a drill string for insertion into and removal from the borehole.