Patents by Inventor Raymond David Ravitz

Raymond David Ravitz 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).

  • Water based completion and displacement fluid and method of use
    Patent number: 10253241
    Abstract: A method of cleaning a wellbore prior to the production of oil or gas is disclosed, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake. The method may include the steps of circulating a breaker fluid into the wellbore, where the breaker fluid includes an aqueous fluid, a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting age, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: April 9, 2019
    Assignee: M-I L.L.C.
    Inventors: Charles Svoboda, Raymond David Ravitz, Mark R. Luyster
  • ACID PRECURSOR IN DIVALENT BRINES FOR CLEANING UP WATER-BASED FILTER CAKES
    Publication number: 20160152884
    Abstract: A method may include circulating a breaker fluid into a wellbore, where the breaker fluid includes a base fluid of divalent brine having an amount of free water therein; a primary breaker; and a secondary breaker present in an amount less than the primary breaker, where the primary breaker is either a hydrolysable ester of a carboxylic acid or an iminodiacetic acid, and the secondary breaker is the other of the hydrolysable ester of a carboxylic acid or an iminodiacetic acid.
    Type: Application
    Filed: July 10, 2014
    Publication date: June 2, 2016
    Inventors: Raymond David Ravitz, Mark R. Luyster, Clotaire-Marie Eyaa Allogo
  • Invert emulsion based completion and displacement fluid and method of use
    Patent number: 9085725
    Abstract: A method of cleaning a wellbore prior to the production of oil or gas, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake is disclosed. The method may include circulating a breaker fluid into the wellbore, where the breaker fluid includes a non-oleaginous internal phase and an oleaginous external phase, where the non-oleaginous phase includes a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting agent, and the oleaginous external phase includes an oleaginous fluid and an emulsifier, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: July 21, 2015
    Assignee: M-I L.L.C.
    Inventors: Charles Svoboda, Raymond David Ravitz, Mark R. Luyster
  • INVERT EMULSION BASED COMPLETION AND DISPLACEMENT FLUID AND METHOD OF USE
    Publication number: 20140087979
    Abstract: A method of cleaning a wellbore prior to the production of oil or gas, wherein the wellbore has been drilled with an invert emulsion drilling mud that forms an invert emulsion filter cake is disclosed. The method may include circulating a breaker fluid into the wellbore, where the breaker fluid includes a non-oleaginous internal phase and an oleaginous external phase, where the non-oleaginous phase includes a water soluble polar organic solvent, a hydrolysable ester of a carboxylic acid, and a weighting agent, and the oleaginous external phase includes an oleaginous fluid and an emulsifier, and where the hydrolysable ester is selected so that upon hydrolysis an organic acid is released and the invert emulsion of the filter cake breaks.
    Type: Application
    Filed: November 27, 2013
    Publication date: March 27, 2014
    Applicant: M-I L.L.C.
    Inventors: Charles Svoboda, Raymond David Ravitz, Mark R. Luyster