Patents by Inventor Charles W. Pleasants

Charles W. Pleasants 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: 5000265
    Abstract: A packing assembly which is connectable to reeled tubing and which can be inserted in and pushed through a wellbore tube by the reeled tubing. The packing assembly is hydraulically set in a locking and sealing position in the wellbore by fluid introduced from the reeled tubing and, after use, is hydraulically released and removed from the wellbore. An actuating apparatus is provided for hydraulically actuating the packing assembly and can be converted in a manner to pull the packing assembly from the wellbore. Prior to the removal of the packing assembly from the wellbore, the wellbore fluid pressure is equalized across the packing assembly.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: March 19, 1991
    Assignee: Otis Engineering Corporation
    Inventors: Charles W. Pleasants, Pat M. White, Ronald J. Fischer, Robert D. Harrison, Jr., John R. Setterberg, Jr.
  • Patent number: 4986362
    Abstract: A running tool for use with reeled tubing and a method of operating same in which a piston assembly extending over a portion of an inner mandrel assembly and in engagement with a locking device. Shear pins connect the piston assembly relative to the inner mandrel assembly and a fluid chamber is defined by cooperating shoulders formed on the inner mandrel assembly and the piston assembly. The inner mandrel assembly has a bore which can be connected to the fluid chamber for establishing fluid pressure in the fluid chamber to exert oppositely directed forces on the shoulder to shear the shear pins in response to a predetermined value of the fluid pressure to permit axial movement of the piston assembly to actuate the locking device.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: January 22, 1991
    Inventor: Charles W. Pleasants