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:
May. 06, 2014
Filed:
Mar. 15, 2010
Richard W. Delange, Kingwood, TX (US);
Scott H. Osburn, Spring, TX (US);
Varadaraju Gandikota, Cypress, TX (US);
Ghazi J. Hashem, Pasadena, TX (US);
Richard W. DeLange, Kingwood, TX (US);
Scott H. Osburn, Spring, TX (US);
Varadaraju Gandikota, Cypress, TX (US);
Ghazi J. Hashem, Pasadena, TX (US);
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
An expansion tool for use in a wellbore includes an expansion surface made up of a concave portion, a convex portion and a straight section therebetween. The straight section is formed according to a formula Y=(1.26) (X)−0.13, where X is the wall thickness of a tubular and Y is the length of the straight section. The concave portion and the convex portion have an arc length extending the concave portion to a trailing edge of the tool. The concave and convex portions are radius-shaped. The arrangement of the shapes and their relation to each other reduces relatively high and low contact pressures and lessens the effects of axial bending in a tubular or a connection.