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:
Nov. 10, 1981
Filed:
May. 21, 1979
Applicant:
Inventors:
Olen R Long, Celina, TX (US);
Ronald F Langham, Carrollton, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166135 ; 166156 ; 166313 ;
Abstract
A well tool or bridge plug for blocking fluid communication through well tubing. The present invention allows a fixed volume of liquid to be trapped within the well tubing while installing the plug. A piston means is releasably secured within the bridge plug. The piston means can slide relative to the housing of the bridge plug to compensate for any liquid displaced by inserting the bridge plug into the well tubing. The present invention is particularly adapted for use in through the flow line (TFL) or pumpdown well completions. However, the present invention could be used with wireline equipment.