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. 14, 1990
Filed:
Jun. 14, 1989
Applicant:
Inventor:
David E Ellwood, Iraan, TX (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166379 ; 166 751 ; 166 85 ; 166105 ; 73151 ; 417 63 ;
Abstract
A well unit dynamometer installation means and method. A reciprocal well unit is operated with a spacer mounted on the polish rod above the carrier bar. To install a dynamometer the unit is stopped, the loading removed from the carrier bar, the spacer removed and the dynamometer attached to the polish rod above the carrier bar. The spacer comprises nested sleeves, each having a slot. The outer sleeve rotates with respect to the inner sleeve, allowing the slots to be aligned so as to be slipped over the polish rod. End plates connected to the inner sleeve allow operating loads to be transmitted through the spacer during operation of the well unit.