Patents by Inventor David B. Acker

David B. Acker 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).

  • Use of delayed release breakers in gelled hydrocarbons
    Publication number: 20010007351
    Abstract: Granules composed of a particulate breaker chemical [e.g. Ca(Oh)2] dispersed in a wax matrix are used in fracturing operations to break hydrocarbon liquids gelled with salts of alkyl phosphate esters. The wax granules are solid at surface temperature and melt or disperse in the hydrocarbon liquid at formation temperature releasing the breaker chemical to react with gelling agent.
    Type: Application
    Filed: January 5, 2001
    Publication date: July 12, 2001
    Inventors: David B. Acker, Fati Malekahmadi
  • Delayed release breakers in gelled hydrocarbons
    Patent number: 6187720
    Abstract: Granules composed of a particulate breaker chemical dispersed in a wax matrix are used in fracturing operations to break hydrocarbon liquids gelled with salts of alkyl phosphate esters. The wax granules are solid at surface temperature and melt or disperse in the hydrocarbon liquid at formation temperature releasing the breaker chemical to react with gelling agent.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: February 13, 2001
    Inventors: David B. Acker, Fati Malekahmadi
  • Viscosifying hydrocarbon liquids
    Patent number: 6169134
    Abstract: An oil based drilling mud is viscosified with a maleated ethylene-propylene elastomers. The elastomers are preferably EPM copolymers or EPDM terpolymers. The concentration of the maleic anhydride grafted to the copolymer or terpolymer backbone ranges from 0.01 to 5 wt %, preferably 0.1 to 2.0 wt %. The maleated elastomers are far more effective oil mud viscosifiers than the organophilic clays presently used.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: January 2, 2001
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Cruise K. Jones, David B. Acker
  • Drilling mud additives and in adding viscosification additives to oil-based drilling muds
    Patent number: 5906966
    Abstract: The present invention is based on the discovery that viscosification agents selected from sulfonated and neutralized sulfonated ionomers can be readily incorporated into oil-based drilling muds in the form of an oil soluble concentrate containing the polymer. Thus, one embodiment of the present invention provides an additive concentrate for oil-based drilling muds comprising a drilling oil, especially a low toxicity oil, and from about 5 gm to about 20 gm of sulfonated or neutralized sulfonated polymer per 100 gm of oil. Indeed, oil solutions obtained from the sulfonated and neutralized sulfonated polymers used as viscosification agents are readily incorporated into drilling mud formulations.
    Type: Grant
    Filed: March 11, 1993
    Date of Patent: May 25, 1999
    Assignee: Exxon Research and Engineering Co.
    Inventors: Warren A. Thaler, John C. Newlove, Cruise K. Jones, David B. Acker
  • Bulk sulfonation of EPDM rubber
    Patent number: 5723550
    Abstract: EPDM elastomer is sulfonated and neutralized by a bulk process involving mechanical mixing at low temperatures in the sulfonating and neutralizing steps. The EPDM is discharged from the mixing process as finely divided particles having a low bulk density.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: March 3, 1998
    Assignee: Nalco/Exxon Energy Chemicals, L.P.
    Inventors: Cruise K. Jones, David B. Acker, Dennis A. Williams, Robert D. Lundberg, Vijay Swarup