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. 21, 1986
Filed:
Feb. 18, 1986
Thomas E Falgout, Sr, Lafayette, LA (US);
John W Hester, Houma, LA (US);
Team Engineering and Manufacturing, Inc., Youngsville, LA (US);
Abstract
A hole opener for use on drill strings in well bore enlargement operations featuring a bore follower extension and a stabilized cutter with poly crystalline diamond compact cutter elements arrayed in a plurality of cutting spiral patterns. Fluid jets are directed toward the cutter arrays and also directed to sweep the opener cut formation in groove regions between the cutter arrays. A hard metal chip covering is on the follower extension to open pilot hole bridges, assisted by a nose jet. Blade form vortex barriers are situated at the confluence of the cutter cleaning and formation sweeping fluid jets. The follower extension is tapered to increase the upward velocity of fluid rising past the extension.