CA3032137 (A1)

High temperature resistant Portland cement slurry and production method thereof

(22) 31.01.2019

(43) 02.08.2019

(57) The invention provides a high temperature resistant Portland cement slurry and a production method thereof. The high temperature resistant Portland cement slurry comprises the following components by weight: 100 parts of an oil well Portland cement, 60-85 parts of a high temperature reinforcing material, 68-80 parts of fresh water, 1-200 parts of a density adjuster, 0.1-1.5 parts of a suspension stabilizer, 0.8-1.5 parts of a dispersant, 3-4 parts of a fluid loss agent, 0-3 parts of a retarder and 0.2-0.8 part of a defoamer. The high temperature resistant Portland cement slurry has a good sedimentation stability at normal temperature, and develops strength rapidly at a low temperature. The compressive strength is up to 40 MPa or more at a high temperature of 350°C, and the long-term high-temperature compressive strength develops stably without degradation. Therefore, it can meet the requirements for field application in heavy oil thermal recovery wells, reaching the level of Grade G Portland cement for cementing oil and gas wells.

(71) China National Petroleum Corporation; CNPC Engineering Technology R&D Company Limited (CN)

x

Related articles:

Issue 4/2019 SG10201810950T (A)

Cement compound and a method for the production thereof

(22) 05.06.2015 (43) 30.01.2019 (57) The present invention relates to a cement compound. The invention also relates to a method for producing such a cement compound. More in particular, the present...

more
Issue 7-8/2015 AU?2012301442?B2

Carbon dioxide-resistant Portland based cement composition

(22) 10.08.2012 (43) 07.03.2013 (57) The invention provides a carbon dioxide-resistant hydraulic cement composition, the inventive composition comprises a Portland cement, Class C fly ash and water....

more
Issue 11-12/2020 WO 2020/170397 A1

Cement composition for high-temperature environments, and concrete for high-temperature environments

(22) 21.02.2019 (43) 27.08.2020 (57) The present invention is a cement composition for high-temperature environments containing at least Portland cement and fly ash satisfying all the fly ash...

more
Issue 4/2021 PL431077 (A1)

Method of producing Portland clinker using de-ironed steel slags

(22) 09.09.2019 (43) 22.03.2021 (57) The subject of the invention is a method of producing Portland clinker with the use of de-ferrous steel slags in a rotary kiln, inclined downwards from the...

more
Issue 10/2020 KR20200076340 (A)

Low carbon low burning cement clinker and preparing method thereof

(22) 19.12.2018 (43) 29.06.2020 (57) The present invention is a low-temperature calcined cement clinker comprising Iimit and calcium silicate, the cement clincher is a low-grade limestone having a CaO...

more