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. 08, 2008
Filed:
Apr. 14, 2003
Thurman B. Carter, Houston, TX (US);
Thomas M. Redlinger, Houston, TX (US);
David J. Brunnert, Houston, TX (US);
Thurman B. Carter, Houston, TX (US);
Thomas M. Redlinger, Houston, TX (US);
David J. Brunnert, Houston, TX (US);
Weatherford/Lamb. Inc., Houston, TX (US);
Abstract
The present invention discloses a whipstock assembly () for use in forming a lateral borehole from a parent wellbore. The whipstock assembly comprises a body () and a deflection member) above the body. The deflection member includes a concave portion () for deflecting a milling bit during a milling operation. Disposed on a perforation plate () portion of the concave portion is a raised surface feature (). The raised surface supports a milling bit above the perforation plate portion during a milling operation. This, in turn, substantially prevents frictional contact between the milling bits and the perforation plate portion during a milling operation. The present invention also provides a novel method for manufacturing a whipstock in which a cavity portion is formed behind the perforation plate by milling out the backside of the deflection member and then joining a second back cover member to the whipstock body to complete the assembly.