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:
Aug. 14, 1984
Filed:
Oct. 12, 1982
John W Hester, Houma, LA (US);
Other;
Abstract
This invention relates to a method of making a drill string stabilizer such as a drill collar stabilizer. It includes the steps of providing a length of drill string or drill collar as the body of the stabilizer. There is also provided a cylindrical section of a thick-walled tubing having an inside diameter matching the outside diameter of the stabilizer body. A plurality of helical and elongated sections from the cylindrical section of tubing are cut to form a plurality of spiral blades. These blades are attached as by welding to the body of said stabilizer in a circumferentially generally equally spaced row thereabout. The cylindrical section of tubing is selected to have a predetermined outside diameter such that the blades will have a predetermined radial thickness when attached to the body. In addition each of the blades may be provided with a tapered end surface so as to facilitate running of the tool in the well bore.