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:
Oct. 22, 2019
Filed:
Apr. 18, 2017
Weatherford Technology Holdings, Llc, Houston, TX (US);
Jason W. Bailey, Houston, TX (US);
John E. Stachowiak, Houston, TX (US);
Douglas Hebert, Houston, TX (US);
Weatherford Technology Holdings, LLC, Houston, TX (US);
Abstract
An artificial lift system for a well has a surface unit and a subsurface pump. The surface unit reciprocates a rod in the well, and the pump disposed in a tubular in the well is actuated by the rod. A barrel of the pump has a standing valve restricting fluid passage out of the barrel. The plunger is reciprocally disposed in the barrel and has seals with the barrel. A traveling valve of the plunger uses a sleeve and a bob. The sleeve is movable relative to the bob to restrict fluid out of the plunger's interior through a variable gap relative to the bob and the sleeve. The filter is disposed on the plunger between the seals and separates the plunger's interior from an annulus between the plunger and the barrel. The filter restricts particulate in the interior from passing into the annulus.