Flow-stopping Means Includes Relatively Movable Cutter Element Patents (Class 175/238)
  • Publication number: 20150114718
    Abstract: A drillable debris barrier tool is positioned under a stage tool to protect tools therebelow from contamination with debris from the stage tool, as it is drilled out. The debris barrier tool includes features that facilitate drill up of stage tool debris and reduce the size of debris generated from removal of the barrier tool.
    Type: Application
    Filed: June 17, 2014
    Publication date: April 30, 2015
    Applicant: Resource Completion Systems Inc.
    Inventors: John Hughes, James Wilburn Schmidt
  • Patent number: 6739412
    Abstract: A boring apparatus is described which comprises a substantially hollow vessel with a fixed base and a rotatable base. The rotatable base is provided, at its circumference, with at least one side cutter which rotatable with the rotatable base from a first position, in which the at least one side cutter serves to cover a respective opening provided in the vessel wall, to a second position, in which the opening in the vessel wall is exposed.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: May 25, 2004
    Assignee: Cementation Foundations Skanska Limited
    Inventor: Peter Gilbert Shotton
  • Patent number: 4323019
    Abstract: A method and apparatus is provided for planting tree seedlings or the like. The apparatus includes an elongate tube, and a pair of blades pivotally mounted to the lower end of the tube. The blades are each pivotal between a closed position closing the lower end of the tube, and an open position wherein the lower end of the tube is open. In use, the lower end of the tube is rotatably advanced into the soil, with the rotating blades acting to pulverize the surrounding soil. Also, the blades will be pivoted to the closed position by the resistance of the soil, to prevent the soil from entering the tube. A seedling is then deposited downwardly through the tube, and the tube is rotated in the reverse direction to withdraw the tube from the soil. During reverse rotation, the blades pivot to their open position to permit the tube to lift from the seedling, and act to press and compact the soil about the roots of the seedling.
    Type: Grant
    Filed: December 20, 1979
    Date of Patent: April 6, 1982
    Assignee: North Carolina State University
    Inventor: William H. Haddock
  • Patent number: 4265036
    Abstract: A method and apparatus for removing bottom material from beneath the surface of a body of water includes a floatable base upon which a tower is mounted for extending vertically upwardly therefrom. A rigid, elongate member having a bucket is connected to the tower and shiftable relative thereto by means of a power-driven motor mounted adjacent the tower. The motor is operable for selectively shifting the elongate member in a substantially vertical direction to effect raising and lowering of the bucket. A carriage is connected by cables to the motor and is operable for substantially vertical shifting along guides provided on the tower. The elongate member is connected to the carriage and suspended therefrom and is also pivotally connected to the carriage to permit pivotal movement of the elongate member about a horizontal axis extending generally perpendicularly to the longitudinal axis of the elongate member.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: May 5, 1981
    Inventor: William J. Staats
  • Patent number: 4023629
    Abstract: An underreamer includes a housing and a plurality of underreamer doors, each including a toggle mechanism for selectively extending and retracting the doors. Upon activation of the toggle mechanism thereby extending the doors, the doors are pivoted outwardly from the housing and the tops of the doors are simultaneously moved downwardly. In this manner the overall vertical height of an underreamer adapted to form a given diameter excavation may be substantially reduced.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: May 17, 1977
    Assignee: Watson, Incorporated
    Inventor: David L. Watson
  • Patent number: 3965999
    Abstract: A drilling grab for pile foundations and well boreholes wherein the drilling grab comprises a grab body supporting circular grab spades which tilt from an open position to a closed position about pivot pins carried by the grab body. A radially projecting abutment interchangeably connected to the outer periphery of the grab body is engageable with the back of the grab spades when the same are in an open position. The abutment overlaps the periphery of the grab body and is characterized in that they consist of extension members adapted to grab spades of different sizes. The members are supported on radially projecting ribs located on the grab body.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: June 29, 1976
    Assignees: Elisabeth Hochstrasser nee Wack, Jurgen Hochstrasser
    Inventors: Hans Mathieu, Jurgen Hochstrasser