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:
Jan. 23, 2001
Filed:
May. 10, 1999
David D. Hearn, Anchorage, AL (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A method and a toolstring for carrying out a downhole operation in a wellbore (e.g. milling a window in a well casing, drilling a lateral wellbore, etc.). The toolstring is comprised of a workstring and a downhole assembly which is comprised of a downhole, rotary motor (e.g. bent motor) for driving a cutting tool (e.g. carbide mill, drill bit, etc.) and a valve which is movable between a first position in which the flow of work fluid is blocked to the motor and a second position in which the fluid is now directed to the motor to thereby actuate the motor and drive the cutting tool. By initially blocking flow of fluid to the motor, certain functions can be performed within the wellbore (e.g. orienting the bent motor) before the motor begins any cutting within the wellbore.