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. 18, 1994
Filed:
May. 20, 1993
Applicant:
Inventor:
Jackie E Smith, Houston, TX (US);
Assignee:
Grant TFW, Inc., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; F16L / ;
U.S. Cl.
CPC ...
175320 ; 285114 ;
Abstract
A pipe body is provided having an upset portion and connecting to a tool joint to form a relatively rigid region. A stress relief groove is provided in this relatively rigid region of the tubular member to limit stress applied in the pipe body adjacent the upset portion by rotation of the pipe while the pipe is in an arcuate portion of a well bore. The stress relief groove is designed to increase flexibility of this relatively rigid region while providing that the anticipated stress to be applied in the relatively rigid section is less than the endurance limit in the locus of the stress relief groove.