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:
Jan. 30, 2024
Filed:
Oct. 16, 2020
Applicant:
The Charles Machine Works, Inc., Perry, OK (US);
Inventors:
Greg L. Slaughter, Jr., Perry, OK (US);
Joseph G. Greenlee, Perry, OK (US);
Joe Glenn Worlow, The Villages, FL (US);
Assignee:
The Charles Machine Works, Inc., Perry, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 7/04 (2006.01); E21B 47/007 (2012.01); E21B 7/00 (2006.01);
U.S. Cl.
CPC ...
E21B 7/046 (2013.01); E21B 7/002 (2013.01); E21B 47/007 (2020.05);
Abstract
An apparatus and method for preventing drill string drag. Rotation encoders are provided for tracking the rotation of an inner and outer member of a dual-member drill string. Based upon the drilling conditions, the readings of the encoder can detect when the inner member is dragging on the outer member. When such a drag condition is detected, a processor can trigger remedial measures, which may include increasing a rotation rate of the inner member, sending a warning signal, stopping operation, or a combination of these.