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:
Mar. 13, 2001
Filed:
Feb. 05, 1999
Applicant:
Inventor:
Robert E. Bender, Morrison, CO (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 4/712 ;
U.S. Cl.
CPC ...
F04B 4/712 ;
Abstract
A plunger in a plunger lift system in an oil and gas well includes circumferential recessed surfaces that define grooves spaced along the plunger body. A curved convex surface or radius is formed between the lower extent of each recessed surface and the plunger body, and a sharp edge or corner connects the upper extent of each recessed surface to the plunger body. The depth of the grooves decreases and the spacing between the grooves decreases from the bottom to the top of the plunger. The shape, sizing and spacing of the grooves improves plunger lift and decreases liquid loss during plunger lift.