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:
Aug. 13, 2002
Filed:
Aug. 07, 2000
Bruce McGarian, Stonehaven, GB;
Ian Gillies, Brechin, GB;
Smith International Inc., Houston, TX (US);
Abstract
This invention relates to hydraulic anchor packers for use in well bores and, more particularly, to inflatable anchor packers. A hydraulic anchor packer ( ) is provided having an inflatable packer element ( ) incorporating a cylinder ( ) and an elastomer sleeve ( ) provided on the exterior surface thereof. The elastomer sleeve ( ) but free of the cylinder ( ) intermediate the end portions. Means are provided for causing fluid from within the cylinder ( ) to flow through an aperture ( ) and between the elastomer sleeve ( ) and the exterior surface of the cylinder so as to radially expand the sleeve ( ). Means are also provided for trapping fluid so as to prevent relaxation of the sleeve ( ). Pressure relief means ( ) permits fluid located exteriorly of the packer ( ) to move past the sleeve ( ) as the sleeve ( ) expands whilst in engagement with a well bore wall during use. Thus, the downhole half of the sleeve ( ) may freely expand and displace fluid located below the packer ( ).