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:
Feb. 26, 1980
Filed:
Mar. 22, 1978
James F Arnold, Houston, TX (US);
Other;
Abstract
A drill collar string is provided for use in the drilling of a well. The string comprises a plurality of drill collars having straight tubular sections vertically spaced apart along the length of the string. Each of the sections are weight relieved along one side thereof to produce an eccentric weighting of the sections such that they act to maintain the drill collar string so that it has little, if any, rubbing contact with the sides of the borehole. Such a drill collar string is also provided with a lowermost drill collar which is likewise eccentrically weighted so that the overall combination can increase drilling rates over those afforded by standard slick drill collars and winged stabilizers.