| Patent application number | Description | Published |
|---|
| 20090107677 | Sealant Composition - A sealant composition for use in subterranean wells comprising an alkali metal silicate and a calcium containing inorganic compound wherein the particles of the calcium containing compound have a mean particle size that is submicron. | 04-30-2009 |
| 20090183876 | Control of the Properties of Cement Slurries With Optimized Polymers Combination - The invention discloses a cement slurry composition for cementing a well comprising: an hydraulic cement, water and a combination made of a hydroxyethyl cellulose and an acrylamido-methyl-propane sulfonate-acrylamide copolymer. | 07-23-2009 |
| 20100004351 | Fluid Loss Control Agents and Compositions for Cementing Oil and Gas Wells Comprising said Fluid Loss Control Agent - It is proposed a new fluid loss control agent useful for the cementation of oil or gas wells. This fluid loss control agent consists of a mixture of a styrene-butadiene latex and a high molecular weight water-soluble polymer such as a copolymer AMPS-Am. The addition of the water-soluble polymer allows drastic reduction of the quantity of latex required to achieve fluid loss control performance and even gas migration control. | 01-07-2010 |
| 20100168273 | CEMENT RETARDER SYSTEMS, AND RETARDED CEMENT COMPOSITIONS - A cement retarder system for use in underground wells included a borate compound, an organophosphonate salt, and a copolymer formed from AMPS and a monomer selected from the group consisting of acrylic acid, acrylamide and mixtures thereof. A method of using the retarder system in an underground well having a borehole drilled therein with a borehole wall, and further including a casing disposed in said borehole, such that an annulus exists between said casing and said borehole wall, comprising the steps of providing a cement composition and a liquid carrier, providing a retarder system for said cement composition comprising a borate compound, an organophosphonate salt, and a copolymer formed from AMPS and a monomer selected from the group consisting of acrylic acid, acrylamide, and mixtures thereof, mixing a sufficient amount of said retarder system to create a desired induction period with said cement composition and said liquid carrier to form a cement slurry, pumping the cement slurry from the surface down the casing, and causing said slurry to return to the surface in the annulus between the casing and the borehole wall. | 07-01-2010 |
| 20100258310 | COMPOSITIONS AND METHODS FOR SERVICING SUBTERRANEAN WELLS - This invention relates to methods for servicing subterranean wells, in particular, fluid compositions and methods for remedial operations during which the fluid compositions are pumped into a wellbore and make contact with well cements placed during primary cementing or previous remedial cementing operations. | 10-14-2010 |
| 20110077175 | Sealant Composition - A sealant composition for use in subterranean wells comprising an alkali metal silicate and a calcium containing inorganic compound wherein the particles of the calcium containing compound have a mean particle size that is submicron. | 03-31-2011 |
| 20110108274 | ADDITIVE FOR WELL CEMENTING APPLICATIONS - An additive for Portland-cement slurries comprises a liquid silicate absorbed into a solid porous medium. The additive is incorporated in slurries designed for well-cementing applications. The liquid silicate functions as a retarder aid and dispersant when added to slurries for use at temperatures above about 85° C. The resulting solid product allows use of the liquid silicate in well-cementing operations as if it were a dry additive. | 05-12-2011 |
