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:
Dec. 06, 1983
Filed:
Sep. 08, 1981
Applicant:
Inventors:
John H Yonker, Carrollton, TX (US);
Henry P Arendt, Dallas, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166383 ; 166 70 ; 166153 ;
Abstract
A pumpdown system in which the pistons providing for movement of the train into and out of the well do not travel down into the tubing below the wellhead and are connected to tools through reach rods extending down into the tubing. The cathead effect resulting from working around the loop with pistons is minimized by guides which substantially center the pistons in the loop and in the preferred form by the use of straight sections of the loop.