Patents by Inventor John P. Crawshaw

John P. Crawshaw 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).

  • Patent number: 6632778
    Abstract: Herein is described a fluid that is useful in consolidating a formation without the use of a gravel pack and screen. In particular, the fluid is useful in consolidating heterogeneous formations where the permeability is not uniform over-the total formation thickness, e.g. a formation having at least a first layer and a second layer, wherein the permeability of the first layer is greater than that of the second layer. The fluid comprises at least one of a resin, a curing agent, and a surfactant, wherein the fluid is self-diverting. Optionally, a catalyst or other additives, such as an oil wetting agent, can be used. Fluids of the present invention are self-diverting, i.e.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: October 14, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Joseph A. Ayoub, John P. Crawshaw, Paul W. Way