Patents by Inventor Hsui-lin Liu

Hsui-lin Liu 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).

  • Method for determining fluid mobility characteristics of earth formations
    Patent number: 4964101
    Abstract: A method for determining the mobility of fluids within earth formations surrounding a borehole. The preferred embodiment of the invention utilizes measured tube wave parameters such as acoustic slowness and attenuation as indicators of formation fluid mobility, and further modifies the results with a mudcake compensated parameter. The mudcake compensated parameter preferably includes a non-zero, finite membrane impedance contribution, and a mudcake elastic deformation contribution. By inputting values for certain mudcake parameters such as mudcake compressional acoustic velocity, shear velocity, density and impedance, the invention generates an improved quantitative estimate for tube wave derived mobility or permeability.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: October 16, 1990
    Assignee: Schlumberger Technology Corp.
    Inventors: Hsui-lin Liu, Philip S. Cheung