Patents by Inventor Jack L. McCrary

Jack L. McCrary 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 drilling mud additive
    Patent number: 4420405
    Abstract: A water based fluid additive useful in drilling mud used during drilling of an oil or gas well is disclosed, produced by reacting water at temperatures between 210.degree.-280.degree. F. with a mixture comprising in percent by weight:______________________________________ Gilsonite 25-30% Tannin 7-15% Lignite 25-35% Sulfonating Compound 15-25% Water Soluble Base Compound 5-15% Methylene-Yielding Compound 1- 5% ______________________________________and then removing substantially all of the remaining water to produce a dried product.
    Type: Grant
    Filed: August 10, 1981
    Date of Patent: December 13, 1983
    Assignee: Icarus, Inc.
    Inventor: Jack L. McCrary
  • Preparation of viscosifiers for zinc salt workover and completion brines
    Patent number: 4415463
    Abstract: Viscosifiers for addition to high zinc salt brines, used as oil well workover and completion fluids, are prepared from natural polysaccharide gums by treatment with a basic nitrogen reagent, such as a quaternary ammonium compound, hexamethylene tetramine, or dimethylol urea. The treated viscosifiers have improved dispersibility and give increased viscosity effects in the brines. Preferably, the viscosifiers are prepared from carrageenan or locust bean gums.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: November 15, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Benjamin Mosier, Jack L. McCrary, Karl G. Guilbeau
  • Sulfonated gilsonite drilling mud additive
    Patent number: 4385999
    Abstract: A sulfonated gilsonite used in a drilling mud for drilling a well wherein the sulfonated gilsonite is prepared by reacting at a temperature between 210.degree.-280.degree. F. with a mixture of water, gilsonite having a softening point of at least 300.degree. F., lignite, sulfonating compound and water soluble based compound for a period of time to sulfonate the gilsonite.
    Type: Grant
    Filed: August 10, 1981
    Date of Patent: May 31, 1983
    Inventor: Jack L. McCrary
  • Preparation of viscosifiers for zinc salt workover and completion brines
    Patent number: 4350601
    Abstract: Viscosifiers for addition to high zinc salt brines, used as oil well workover and completion fluids, are prepared from polysaccharide gums or gelatin by treatment with formaldehyde and/or an aliphatic dialdehyde containing from 2 to 6 carbons. The treated viscosifiers have improved dispersibility and give increased viscosity effects in the brines. Preferably, the viscosifiers are prepared from carrageenan, locust bean gum, hydroxyethyl cellulose, or gelatin by treatment with a mixture of formaldehyde and glyoxal.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: September 21, 1982
    Assignee: The Dow Chemical Co.
    Inventors: Benjamin Mosier, Jack L. McCrary, Karl G. Guilbeau