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:
Aug. 21, 2018
Filed:
Dec. 07, 2015
Applicant:
Tejas Research & Engineering, Llc, The Woodlands, TX (US);
Inventors:
Sam Herod, Conroe, TX (US);
Robert Henschel, The Woodlands, TX (US);
Thomas G. Hill, Jr., Conroe, TX (US);
Assignee:
Tejas Research & Engineering, LLC, The Woodlands, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/129 (2006.01); E21B 23/01 (2006.01); E21B 43/12 (2006.01);
U.S. Cl.
CPC ...
E21B 23/01 (2013.01); E21B 43/127 (2013.01);
Abstract
Apparatus and method for limiting the expansion and contraction of a production tubular within a pumpjack oil well includes an anchor having a hydraulic dampening chamber and an expansion joint. A piston is attached to the tubular and position within the hydraulic dampening chamber so that axial expansion and contraction of the tubular caused by thermal and loading forces is resisted by the constrained movement of the piston within the hydraulic chamber.