Patent · US Active

Stage tool for wellbore cementing

US10273781B2 · kind B2 · utility

1Cited by

48References

10Claims

0Family size

Inventors

Daniel Jon Themig · Calgary, CA
Christopher Denis Desranleau · Sherwood Park, CA
James Fehr · Sherwood Park, CA

Key dates

Filing date	Apr 10, 2017
Grant date	Apr 30, 2019
Priority date	—
Expiry date	Apr 10, 2037

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B2200/06
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A stage tool for wellbore annular cementing may be opened for cementing by hydraulic actuation of a sliding sleeve valve from over a fluid port. After sufficient cement has been introduced, the stage tool fluid port can be closed by compressing two telescopically arranged parts of its tubular body to further overlap each other and overlie the fluid port. This permits the stage tool to be closed without employing a plug.

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