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. 22, 2022
Filed:
Oct. 17, 2018
Applicant:
Eni S.p.a., Rome, IT;
Inventor:
Gilberto Toffolo, Sandnes, NO;
Assignee:
ENI S.P.A., Rome, IT;
Primary Examiner:
Int. Cl.
CPC ...
E21B 31/00 (2006.01); E21B 47/00 (2012.01);
U.S. Cl.
CPC ...
E21B 31/005 (2013.01); E21B 47/00 (2013.01);
Abstract
A drilling apparatus and a method for releasing rods stuck in surrounding ground use a torsional device for releasing the drilling assembly and induce centrifugal forced vibrations and bending vibrations in the drilling rods, facilitating the release from positions stuck inside the drilled hole. The apparatus allows the available power of the motor drilling device to be fully applied for generating periodic forced vibrations useful for detaching the drilling rods stuck in the surrounding ground.