Patents by Inventor A. J. Dach, III

A. J. Dach, III 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).

  • Rigless abandonment system
    Patent number: 8967270
    Abstract: A rigless abandonment system including a surface vessel having an attached lifting device and a moonpool. The system further includes a cutting module configured to connect to a subsea wellhead, the cutting module having a wellhead connector having an actuatable lock and release mechanism, a motor assembly, and a cutter. An umbilical line connects the cutting module to the surface vessel, wherein the lifting device is used to raise and lower the cutting module connected to the surface vessel through the moonpool. A method for performing rigless casing cutting and wellhead removal operations, the method includes positioning a surface vessel above a subsea wellhead, where the surface vessel has a moonpool and a lifting device. The method further includes providing a cutting module, and deploying the cutting module through the moonpool, wherein the cutting module is connected to the surface vessel by an umbilical line.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 3, 2015
    Assignee: Smith International, Inc.
    Inventors: Praful C. Desai, Lawrence Barr, Anton J. Dach, III
  • Methods of making multiple casing cuts
    Patent number: 7762330
    Abstract: Methods of removing casing from a wellbore, the method including disposing a drilling tool assembly in a wellbore, the drilling tool assembly including a cutting device, a spearing device, and a jarring device. The methods further including activating the cutting device, cutting a first casing segment, deactivating the cutting device and activating a spearing device. The method further including engaging the spearing device with the first casing segment, activating the jarring device to free the first casing segment, and removing the first casing segment from the wellbore.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: July 27, 2010
    Assignee: Smith International, Inc.
    Inventors: James E. Saylor, III, Thomas D. Helbert, Marc Henderson, Joeseph V. Hebert, Trygve Berthelsen, Randall Louis Hebert, Malcolm Perschke, A. J. Dach, III, Harshad Patil, Praful C. Desai
  • RIGLESS ABANDONMENT SYSTEM
    Publication number: 20100163244
    Abstract: A rigless abandonment system including a surface vessel having an attached lifting device and a moonpool. The system further includes a cutting module configured to connect to a subsea wellhead, the cutting module having a wellhead connector having an actuatable lock and release mechanism, a motor assembly, and a cutter. An umbilical line connects the cutting module to the surface vessel, wherein the lifting device is used to raise and lower the cutting module connected to the surface vessel through the moonpool. A method for performing rigless casing cutting and wellhead removal operations, the method includes positioning a surface vessel above a subsea wellhead, where the surface vessel has a moonpool and a lifting device. The method further includes providing a cutting module, and deploying the cutting module through the moonpool, wherein the cutting module is connected to the surface vessel by an umbilical line.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 1, 2010
    Applicant: Smith International, Inc.
    Inventors: Praful C. Desai, Lawrence Barr, Anton J. Dach, III