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:
Mar. 14, 1989
Filed:
Oct. 22, 1987
Applicant:
Inventors:
Guy J Hill, Friendswood, TX (US);
Homer G Smith, Jr, Houston, TX (US);
Mark W Schnitker, Missouri City, TX (US);
Glenn E Beatty, Houston, TX (US);
Assignee:
Homco International Inc., Bellaire, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; B23P / ;
U.S. Cl.
CPC ...
175323 ; 138118 ; 464 18 ; 29469 ;
Abstract
The invention relates to an improved drill string member having at least one spiral groove formed in its outside surface and incorporating a combination of engineering considerations and criteria such that the invention member will have an extraordinarily high performance capacity in directional drilling. The invention member can make bends in the well on radii as short as 25-50 feet and is particularly suitable for operation together with downhole motor driven bits.