Patents Assigned to Sasol Chemicals GmbH
  • Alkyl alkoxylated carboxylate salts as steam foam additives for heavy oil recovery
    Patent number: 11578254
    Abstract: Recovering heavy oil from a subterraneous formation penetrated by at least one injection well and one production well, by injecting into the injection well a mixture of steam and an alkyl alkoxylated carboxylate salt, increasing the apparent viscosity of the steam while at the same time lowering the steam mobility, and recovering oil from the subterranean formation.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: February 14, 2023
    Assignee: Sasol Chemicals GmbH
    Inventors: Thu Nguyen, Renke Rommerskirchen, Jorge Fernandez
  • Use of polymeric additives for paraffin-containing fluids
    Patent number: 11441095
    Abstract: The present invention is concerned with the use of polymeric additives for paraffin-containing fluids as pour point depressants and low temperature flow improvers, wherein the polymers comprise styrene and maleic acid dialkyl ester building blocks.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: September 13, 2022
    Assignee: Sasol Chemicals GmbH
    Inventors: Oliver Herzog, Sabine Scherf, Michael Ruffmann, Wolfgang Breuer
  • Composition comprising an alkoxylated amine compound and a carboxylic acid compound, use thereof in water in oil emulsions and process using the composition as or as part of a drilling fluid
    Patent number: 11124688
    Abstract: The object of the present invention is a composition comprising amine compound and carboxylic acid compounds, wherein at least the amine compounds are alkoxylated, use thereof as a drilling fluid, and a method for using the drilling fluid.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: September 21, 2021
    Assignee: Sasol Chemicals GmbH
    Inventors: Heinz Napierala, Ludger Bosing
  • Compositions and methods for treating oil and gas wells
    Patent number: 11084968
    Abstract: A composition for use in various down-hole operations in oil and gas wells. The compositions can include various combinations of certain ethers and other components e.g., esters, alkoxylated alcohols, acidizing agents and hydrocarbon co-solvents. The compositions are useful in a wide variety of down-hole applications particularly well cleaning, filter cake removal and well stimulation techniques e.g., acidizing.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: August 10, 2021
    Assignee: Sasol Chemicals GmbH
    Inventors: Nelson Akaighe, Jorge Fernandez, Christian Jones