Patent · US Active

Nested fin cement wiper plugs

US11624260B2 · kind B2 · utility

1Cited by

3References

19Claims

0Family size

Assignee

EOG Resources, Inc. · US

Inventors

James G. Nanney · Midland, US
Logan Daniel Farmar · Midland, US

Key dates

Filing date	Nov 12, 2020
Grant date	Apr 11, 2023
Priority date	—
Expiry date	Jul 22, 2041

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/16
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A cement wiper plug for deployment in casing with an inner radius has a central axis, a leading end, and a trailing end opposite the leading end. The wiper plug includes an elongate body. In addition, the wiper plug includes a first plurality of axially adjacent annular fins mounted to the body. Each fin extends radially outward from the body and each fin extends circumferentially about the body. The first plurality of fins includes a first fin and a second fin axially adjacent the first fin. The second fin is axially positioned between the first fin and the trailing end. The first fin and the second fin are configured to contact each other in the casing. The second fin is configured to bias the first fin radially outward and axially forward toward the leading end.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.