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:
Jul. 17, 2007
Filed:
Sep. 20, 2004
David R. Hall, Provo, UT (US);
Scott Dahlgren, Alpine, UT (US);
Tracy H. Hall, Jr., Provo, UT (US);
Joe Fox, Lehi, UT (US);
David S. Pixton, Provo, UT (US);
David R. Hall, Provo, UT (US);
Scott Dahlgren, Alpine, UT (US);
Tracy H. Hall, Jr., Provo, UT (US);
Joe Fox, Lehi, UT (US);
David S. Pixton, Provo, UT (US);
IntelliServ, Inc., Provo, UT (US);
Abstract
An apparatus in a drill string comprises an internally upset drill pipe. The drill pipe comprises a first end, a second end, and an elongate tube intermediate the first and second ends. The elongate tube and the ends comprising a continuous an inside surface with a plurality of diameters. A conformable spirally welded metal tube is disposed within the drill pipe intermediate the ends thereof and terminating adjacent to the ends of the drill pipe. The conformable metal tube substantially conforms to the continuous inside surface of the metal tube. The metal tube may comprise a non-uniform section which is expanded to conform to the inside surface of the drill pipe. The non-uniform section may comprise protrusions selected from the group consisting of convolutions, corrugations, flutes, and dimples. The non-uniform section extends generally longitudinally along the length of the tube.