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:
Oct. 19, 2010
Filed:
Apr. 05, 2010
Graham a Mcelhinney, Inverurie, GB;
Graham A McElhinney, Inverurie, GB;
Smith International, Inc., Houston, TX (US);
Abstract
A method for drilling substantially parallel twin wells includes drilling a first well and deploying a casing string in the first well. A magnetized section of the casing string includes a plurality of magnetized wellbore tubulars having at least one pair of opposing magnetic poles located between longitudinally opposed ends of the wellbore tubular. A portion of a second well is drilled within sensory range of magnetic flux from the magnetized section of the casing string. The local magnetic field is measured in the second well and processed to determine a direction for subsequent drilling. Drilling proceeds along the direction for subsequent drilling.