Patents by Inventor Ronald Allen Smith

Ronald Allen Smith 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).

  • Mutual solvents comprising 2,2,4-trimethyl-1,3-pentanediol mono-or di-isobutyrate and stable emulsions thereof
    Patent number: 6242388
    Abstract: A mutual solvent for use in oil and gas well operations comprising 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate and/or 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, a coupling solvent, and an acid stable surfactant. The coupling solvent is selected from ethylene glycol monobutyl ether; diethylene glycol monobutyl ether; propylene glycol monomethyl ether acetate; propylene glycol monomethyl ether; C1-C5 alkyl alcohol; and mixtures thereof. The invention also relates to an emulsion for use in oil and gas well operations comprising an aqueous acid or acid-salt brine solution and the mutual solvent as described above. An emulsion according to the invention is stable, non-toxic, and effectively removes asphaltenic and paraffinic hydrocarbons from drilling equipment and oil and gas wells.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: June 5, 2001
    Assignee: Eastman Chemical Company
    Inventors: Mahendra Kumar Sharma, Ronald Allen Smith, Melissa Darlene Goodwin