Patents by Inventor Doug Pullman

Doug Pullman 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).

  • Patent number: 8168067
    Abstract: A process for treating and disposing a liquid waste, which is solidified prior to disposal, includes steps of adding to said liquid waste a dry treatment product generally comprising approximately 25% to 75% bentonite clay and respectively 75% to 25% of a liquid-sorbing polymer, subjecting the liquid waste to a single pass high shear mix so as to incorporate the treatment product into the liquid waste with increased dispersion and reduced agglomeration, subjecting the treated liquid waste to a retention time suitable for solidification, and disposing of the solidified liquid waste. The liquid waste preferably is recirculated prior to addition of dry treatment product so as to permit a calibration of the characteristics of the liquid waste, and subsequent determination of the correct rate of dry treatment addition.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: May 1, 2012
    Assignee: Metaflo Technologies Inc.
    Inventors: Roger H. Woods, Doug Pullman
  • Publication number: 20110124944
    Abstract: A process for treating and disposing a liquid waste, which is solidified prior to disposal, includes steps of adding to said liquid waste a dry treatment product generally comprising approximately 25% to 75% bentonite clay and respectively 75% to 25% of a liquid-sorbing polymer, subjecting the liquid waste to a single pass high shear mix so as to incorporate the treatment product into the liquid waste with increased dispersion and reduced agglomeration, subjecting the treated liquid waste to a retention time suitable for solidification, and disposing of the solidified liquid waste. The liquid waste preferably is recirculated prior to addition of dry treatment product so as to permit a calibration of the characteristics of the liquid waste, and subsequent determination of the correct rate of dry treatment addition.
    Type: Application
    Filed: January 31, 2011
    Publication date: May 26, 2011
    Applicant: METAFLO TECHNOLOGIES INC.
    Inventors: Roger H. Woods, Doug Pullman
  • Patent number: 7901571
    Abstract: A flow-through mixing apparatus for incorporating a dry treatment product into a waste stream. The apparatus comprises a pump for directing a liquid waste from a storage pit/tank, a mixer that receives the liquid waste from the pump, and a valve downstream of the mixer for either recirculating the liquid waste back to the storage pit/tank via a recirculation conduit, or directing the liquid waste to a discharge conduit. The mixer comprising a jet nozzle, a venturi tube and a high-shear assembly. The recirculation conduit establishes a calibration loop for determining the appropriate treatment regimen based on the characteristics of the waste liquid. The recirculation conduit also permits the homogenization of the pit/tank contents prior to addition of the dry treatment product. The dry treatment product introduced in the region of the mixer is subjected high shear forces, thereby incorporating the dry treatment product into the waste stream with increased dispersion and reduced agglomeration.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: March 8, 2011
    Inventors: Roger H. Woods, Doug Pullman
  • Publication number: 20090001000
    Abstract: An apparatus for treating liquid waste material includes first adding a chemical flocculent to the liquid waste material followed in a mixer to promote flocculation. The floc material is subsequently separated to produce a bulk clarified liquid, with the floc material being subjected to a solids separator to extract further bulk clarified liquid. The collected bulk clarified liquid is then recycled back in a recycle loop into at least one of the steps of adding a chemical flocculent and solids separation of the floc material. The apparatus is suitable for use with a wide variety of liquid waste materials ranging from agricultural and human waste to industrial waste. An apparatus for treating liquid waste material is also provided.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 1, 2009
    Applicant: Roger H. Woods Limited
    Inventors: Doug Pullman, Roger H. Woods
  • Publication number: 20080223792
    Abstract: A flow-through mixing apparatus for incorporating a dry treatment product into a waste stream. The apparatus comprises a pump for directing a liquid waste from a storage pit/tank, a mixer that receives the liquid waste from the pump, and a valve downstream of the mixer for either recirculating the liquid waste back to the storage pit/tank via a recirculation conduit, or directing the liquid waste to a discharge conduit. The mixer comprising a jet nozzle, a venturi tube and a high-shear assembly. The recirculation conduit establishes a calibration loop for determining the appropriate treatment regimen based on the characteristics of the waste liquid. The recirculation conduit also permits the homogenization of the pit/tank contents prior to addition of the dry treatment product. The dry treatment product introduced in the region of the mixer is subjected high shear forces, thereby incorporating the dry treatment product into the waste stream with increased dispersion and reduced agglomeration.
    Type: Application
    Filed: July 5, 2006
    Publication date: September 18, 2008
    Applicant: ROGER H. WOODS LIMITED
    Inventors: Roger H. Woods, Doug Pullman
  • Publication number: 20050205496
    Abstract: A process for treating liquid waste material, comprises first adding a chemical flocculent to the liquid waste material followed by mixing to promote flocculation. The floc material is subsequently separated to produce a bulk clarified liquid, with the floc material being subjected to a solids separation to extract further bulk clarified liquid. The collected bulk clarified liquid is then recycled back into at least one of the steps of adding a chemical flocculent and solids separation of the floc material. The process is suitable for use with a wide variety of liquid waste materials ranging from agricultural and human waste to industrial waste. An apparatus for treating liquid waste material is also provided.
    Type: Application
    Filed: January 21, 2005
    Publication date: September 22, 2005
    Applicant: Roger H. Woods Limited
    Inventors: Doug Pullman, Roger Woods
  • Patent number: 6533946
    Abstract: An apparatus and method for recycling drilling mud contaminated with particulates, consists of channelling a stream of contaminated slurry onto a screen deck, with the partly cleansed liquid entering a mixing tank. Liquid within the tank is continually mixed. An exit conduit removes liquid from the tank on a continuous basis, where it is given an additional purification with a cyclonic separator. The heavier fraction is further screened, with the resulting purified liquid re-entering the tank. The lighter fraction exists the cyclonic separator, and a portion of the lighter liquid is withdrawn for use as a substantially cleansed liquid. Another portion of the lighter fraction is re-circulated back into the tank, thus providing multi passes through the system to provide enhanced purification. The cleansed liquid may be directed into a separate mixing apparatus, in which additional slurry-forming powder such as Bentonite is added for forming a new slurry.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: March 18, 2003
    Assignee: Roger H. Woods Limited
    Inventor: Doug Pullman
  • Publication number: 20020104806
    Abstract: An apparatus and method for recycling drilling mud contaminated with particulates, consists of channelling a stream of contaminated slurry onto a screen deck, with the partly cleansed liquid entering a mixing tank. Liquid within the tank is continually mixed. An exit conduit removes liquid from the tank on a continuous basis, where it is given an additional purification with a cyclonic separator. The heavier fraction is further screened, with the resulting purified liquid reentering the tank. The lighter fraction exists the cyclonic separator, and a portion of the lighter liquid is withdrawn for use as a substantially cleansed liquid. Another portion of the lighter fraction is re-circulated back into the tank, thus providing multi passes through the system to provide enhanced purification. The cleansed liquid may be directed into a separate mixing apparatus, in which additional slurry-forming powder such as Bentonite is added for forming a new slurry.
    Type: Application
    Filed: February 2, 2001
    Publication date: August 8, 2002
    Inventor: Doug Pullman