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. 29, 2006
Filed:
Sep. 03, 2004
Applicants:
James L. Weber, Calgary, CA;
Lynn P Tessier, Cochrane, CA;
John P. Doyle, Calgary, CA;
Inventors:
Assignee:
MSI Machineering Solutions Inc., Providenciales, TC;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 23/10 (2006.01); E21B 33/12 (2006.01); E21B 33/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A self-retaining cementing wiper plug with a packer element has two or more steel or carbide tipped holddown fingers or slips extending radially outward from the plug for engaging the inner surface of the casing and preventing the plug from moving uphole over time and potentially interfering with other downhole apparatus such as a pump. The packer element in the wiper plug is actuated when the plug is supported by an obstruction under the plug and then compressed, the packer being maintained in compression by the holddown fingers.