Weatherford Technology Holdings, LLC

Halliburton Energy Services, Inc.

Conocophillips Company

Weatherford/lamb, Inc.

Todd Douglas Cooper

Don M Hannegan

Frank Zamora, Jr

Michael Brian Grayson

David Pavel

Cesar Pena

Said Boutalbi

Timothy P Dunn

Frank Zamora

Henry Eugene Rogers

David Durward Szarka

John Richard Johnson

Nicholas C Braun

William W Gilbert

David Burkhead

Frank Zamora Jr

A method of cementing a tubular string in a wellbore includes: deploying the tubular string into the wellbore; pumping cement slurry into the tubular string; launching a cementing plug after pumping the cement slurry; propelling the cementing plug through the tubular string, thereby pumping the cement slurry through the tubular string and into an annulus formed between the tubular string and the wellbore; and controlling flow of fluid displaced from the wellbore by the cement slurry to control pressure of the annulus.

Managed pressure cementing

Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a second end; a compressible body attached to and surrounding a longitudinal portion of the mandrel; and a sealing nose attached to the first end of the mandrel. In certain embodiments, systems for achieving zonal isolation of a casing string in a well bore may comprise a diverter plug comprising a mandrel having a first end and a second end, a compressible body attached to and surrounding a longitudinal portion of the mandrel, and a sealing nose attached to the first end of the mandrel; and a landing collar sized to mate with a portion of the sealing nose of the diverter plug. Associated methods are also provided.

Diverter plugs for use in well bores and associated methods of use

Growing community of inventors

The Woodlands, TX, United States of America

Todd Douglas Cooper