Patents by Inventor Brian William Cruickshank

Brian William Cruickshank has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for forming an optimized window
    Patent number: 6840320
    Abstract: Methods and apparatus are described for forming a window of optimum dimensions in casing wall. A window of maximum width is cut when the center line of the mill tool is located inside of the inner diameter of the casing where a maximum amount of casing is drilled away by the mill tool. A whipstock is described which deviates the mill tool outwardly so that the center line of the mill tool is in approximately this position. The whipstock then maintains the mill tool at this approximate location until a window of desired length is cut having a substantially maximum width. The whipstock then deviates the mill tool such that the centerline is outside of the casing to drill a rathole into the formation.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: January 11, 2005
    Assignee: Smith International, Inc.
    Inventors: Charles H. Dewey, Brian William Cruickshank
  • Method and apparatus for forming an optimized window
    Publication number: 20030102129
    Abstract: Methods and apparatus are described for forming a window of optimum dimensions in casing wall. A window of maximum width is cut when the center line of the mill tool is located inside of the inner diameter of the casing where a maximum amount of casing is drilled away by the mill tool. A whipstock is described which deviates the mill tool outwardly so that the center line of the mill tool is in approximately this position. The whipstock then maintains the mill tool at this approximate location until a window of desired length is cut having a substantially maximum width. The whipstock then deviates the mill tool such that the centerline is outside of the casing to drill a rathole into the formation.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 5, 2003
    Applicant: Smith International, Inc.
    Inventors: Charles H. Dewey, Brian William Cruickshank