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, 2023
Filed:
May. 29, 2019
Applicant:
Knjb, Inc., Houston, TX (US);
Inventor:
Kenneth L Nash, Houston, TX (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 44/04 (2006.01); E21B 7/04 (2006.01); E21B 17/10 (2006.01);
U.S. Cl.
CPC ...
E21B 44/04 (2013.01); E21B 7/04 (2013.01); E21B 17/1078 (2013.01);
Abstract
A downhole ratchet is utilized between tubulars in the drill string to reduce torsion energy in the drill string. The downhole ratchet is constructed to release when the tubular below the ratchet spins faster than the tubular above the ratchet. When the tubular below spins more slowly or at the same speed then the ratchet mechanism locks the upper and lower tubulars together to rotate the bit. The effect is to release torsional energy in the drill string to reduce and eliminate slip stick oscillations.