Patents by Inventor Norman Ogilvy

Norman Ogilvy 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).

  • Well bore fluid
    Patent number: 4900456
    Abstract: A method for the completion or work-over of a well comprises the step of using a solids-free, non-aqueous well-bore fluid comprising a halogenated organic compound as a completion or work-over fluid. The fluid has a specific gravity in the range 0.9 to 2.3.Preferred halogenated organic compounds are brominated aromatic ethers, diphenyls, aliphatic hydrocarbons, benzene and alkyl benzenes.The halogenated organic compound may be dissolved in an organic solvent. The relative proportions may be chosen to provide a well-bore fluid having a desired specific gravity.The fluids are non-corrosive, thermally stable and non-damaging to formations.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: February 13, 1990
    Assignee: The British Petroleum Company p.l.c.
    Inventor: Norman Ogilvy