Halliburton Energy Services, Inc.

Other

Institut Francais Du Pe'trole

Bach Dao

Jan Pieter Vijn

Mohand Melbouci

Ewout Biezen

Lance Everett Brothers

Krishna M Ravi

Alain Rivereau

Krista L Keener

James A Braden

Christine Noik

Marcel Rietjens

Thien Pham

B Raghava Reddy

Ron Bouwmeester

Marco Verlaan

Storable water-silica suspensions and methods of cementing well bores are provided. The storable water-silica suspensions are basically comprised of water, silica and an effective amount of a suspending agent selected from the group consisting of colloidal materials, clays and gel forming polymers.

Storable water-silica suspensions and methods

Methods and compositions for reducing the permeabilities of subterranean formations or zones are provided. The methods of the invention are basically comprised of introducing an aqueous composition into the formation or zone comprised of water, a water soluble organic polymer, an organic gelling agent for cross-linking the organic polymer and a gel retarder comprised of a chemical compound that hydrolyzes or thermolyzes to produce one or more acids in the composition and then allowing the aqueous composition to form a cross-linked gel in the formation or zone.

Methods and compositions for reducing subterranean formation permeabilities

The present invention provides a cement composition and a process for using the cement composition to inhibit gas migration from a subterranean zone into the cement. The process comprises displacing a gelling additive, preferably comprised within a cement composition, into a well bore such that the gelling additive passes into the subterranean zone, and allowing the gelling additive to form a crosslinked gel in the subterranean zone to inhibit gas migration from the subterranean zone. The crosslinked gel acts as a barrier to gas in the subterranean zone and thereby inhibits the gas from passing into the cement and forming flow channels therein before the cement can set.

Process for controlling gas migration during well cementing

Storable water-microsphere suspensions for use in well cements and methods of cementing well bores are provided. The storable water-microsphere suspensions are basically comprised of water, microspheres and an effective amount of a suspending agent selected from the group consisting of microfine or colloidal materials and gel forming polymers.

Storable water-microsphere suspensions for use in well cements and methods

The present invention provides methods, lightweight well cement compositions and additives for the well cement compositions. The methods of the invention for sealing pipe in a well bore penetrating a zone or formation which readily fractures at low hydrostatic pressure is basically comprised of the steps of providing a lightweight cement composition comprised of a hydraulic cement, water and an additive comprising an aqueous suspension of microspheres containing a water swellable clay suspending agent, placing the cement composition in the annulus between the pipe and the well bore and allowing the cement composition to set.

Methods, well cement compositions and lightweight additives therefor

A method and composition is provided using whey protein as a retarder in a cementing composition for use in cementing operations in a subterranean zone penetrated by a well bore.

Whey protein retarder

Lightweight cement compositions and methods of cementing a subterranean zone penetrated by a well bore utilizing the compositions are provided. A lightweight cement composition of the invention is basically comprised of a coarse particulate hydraulic cement, an ultrafine particulate hydraulic cement mixture comprised of slag cement and a Portland or equivalent cement, fly ash, fumed silica, hollow glass spheres and water.

Lightweight well cement compositions and methods

Environmentally acceptable well cement fluid loss control additives, cement compositions including the additives and methods of using the compositions are provided. The environmentally acceptable fluid loss control additives are comprised of ethoxylated hydroxyethylcellulose having a reduced molecular weight.

Environmentally acceptable well cement fluid loss control additives, compositions and methods

Environmentally acceptable well cement fluid loss control additives, compositions, and methods

Delayed thixotropic cement compositions and methods of cementing in subterranean zones penetrated by well bores are provided. The novel cement compositions are basically comprised of a hydraulic cement, sufficient water to form a slurry and a water soluble delayed thixotropy imparting additive selected from the group consisting of carbonic acid and alkali metal carbonates.

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Nieuw Vennep, Netherlands

Bach Dao