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...

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 methods of using passivated cement accelerators in...

Issue 9/2020 ONESTONE CONSULTING LTD.

Outlook on the gypsum industry

1 Introduction OneStone Consulting Ltd. published a new market report with the title Gypsum Industry Focus 2030 [1]. In this multi-client market study, a breakdown of the global gypsum industry is...

Issue 02/2013

Optimisation of plasticizers for gypsum applications

In recent years, PCE-based plasticizers have not only been used in cementitious binders, they have also increasingly been selected for a range of gypsum applications. It became apparent at this time...

ZKG 10/2016