CA2921046 (A1)

Oil well cementing products with synthetic gypsum and methods

(22) 16.02.2016

(43) 17.08.2016

(57) An oil well cementing product comprising DTPA-coated synthetic calcined gypsum, at least one accelerator, at least one retarder, at least one plasticizer and limestone is provided. Also provided are methods for cementing oil wells with mixtures comprising DTPA-coated synthetic calcined gypsum, at least one accelerator, at least one retarder, at least one plasticizer and limestone.

(73) United States Gypsum Company (US)

Issue 1/2024 US 2023/0339811 A1

Gypsum set accelerator

(22) 01.11.2022(43) 26.10.2023(57) Provided are a gypsum set accelerator wherein the gypsum set accelerator is a dry-milled mixture comprising calcium sulfate dihydrate co-ground with one or more of...

Issue 4/2019 US 2019/0016633 A1

Calcined gypsum treatment device and calcined gypsum treatment method

(22) 31.01.2017(43) 17.01.2019(57) A calcined gypsum treatment apparatus has an agitating type of cooler provided with a cooling region for cooling the calcined gypsum, and a moisture supplying device...

Issue 9/2020 ONESTONE CONSULTING LTD.

Outlook on the gypsum industry

The gypsum industry is undergoing a number of very important changes. The Covid-19 pandemic is having a major impact in 2020, but despite the projected decline this year, the future looks bright. This...

Issue 7-8/2016 AU 2014/384686 A1 | WO 2015/130284 A1

Passivated cement accelerator

(22) 27.02.2014 (43) 03.09.2015 (57) Embodiments relate to cementing operations and, in certain embodiments, to passivated cement accelerators and...

Issue 7-8/2017 Bauhaus-Universität Weimar

Additive-dependent effects on plaster hydration

The purpose of this work was to illuminate the effects of certain additives or of combined additives on a hydrating gypsum plaster. The changes in hydration and the strength development process are...

ZKG 10/2016