Patents by Inventor Hafiz Mudaser Ahmad

Hafiz Mudaser Ahmad has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Organophilic clay based drilling fluids containing Gemini surfactant and polyacrylamide
    Patent number: 11407928
    Abstract: A drilling fluid formulation which includes an aqueous phase, and additives including an organophilic clay, a gemini surfactant, and a polyacrylamide. The organophilic clay contains an ion-exchange reaction product of a clay material (e.g. smectite) and quaternary ammonium cations. The polyacrylamide contains reacted units of an acrylamide monomer, an acrylate monomer, and a hydrophobicity modifying monomer. Rheology properties of the drilling fluid including gel strength, yield stress, and storage modulus are specified. The additives present in the drilling fluid synergistically boost its shale swelling inhibition capability.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: August 9, 2022
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Muhammad Shahzad Kamal, Mamdouh A. Al-Harthi, Hafiz Mudaser Ahmad, S. M. Shakil Hussain, Mohamed Mahmoud
  • ORGANOPHILIC CLAY BASED DRILLING FLUIDS CONTAINING GEMINI SURFACTANT AND POLYACRYLAMIDE
    Publication number: 20200325381
    Abstract: A drilling fluid formulation which includes an aqueous phase, and additives including an organophilic clay, a gemini surfactant, and a polyacrylamide. The organophilic clay contains an ion-exchange reaction product of a clay material (e.g. smectite) and quaternary ammonium cations. The polyacrylamide contains reacted units of an acrylamide monomer, an acrylate monomer, and a hydrophobicity modifying monomer. Rheology properties of the drilling fluid including gel strength, yield stress, and storage modulus are specified. The additives present in the drilling fluid synergistically boost its shale swelling inhibition capability.
    Type: Application
    Filed: September 23, 2019
    Publication date: October 15, 2020
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Muhammad Shahzad KAMAL, Mamdouh A. Al-Harthi, Hafiz Mudaser Ahmad, S.M. Shakil Hussain, Mohamed Mahmoud