Patents by Inventor Leendert Spreij

Leendert Spreij 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: 6056060
    Abstract: A new joint compensator and systems with it and methods of their use have been invented which, in one aspect, includes a compensator system for compensating for the weight of at least one joint, which is a wellbore tubular member, the compensating system for use below a wellbore apparatus, the wellbore apparatus for supporting the at least one joint, the compensation system having a joint compensator suspended below the wellbore apparatus and connected thereto for selectively compensating for the weight of the at least one joint, a lower elevator suspended below and interconnected with the joint compensator for releasably holding the at least one joint, and a wellbore elevator connected to the wellbore apparatus for selectively supporting the joint compensator and the at least one joint.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: May 2, 2000
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Egill Abrahamsen, Stephen L. Albright, Jimmy L. Hollingsworth, Jr., Jean D. Bearb, Frederick M. Leicht, Michael Hayes, John Birdwell, Leendert Spreij
  • Patent number: 6000472
    Abstract: New joint compensator and systems and methods of their use have been invented which, in one aspect are useful for compensating for the weight of a first joint and at least one subsequent joint, the first joint to be supported above the at least one subsequent joint, the joint compensator in one aspect having a body interconnectible between the first joint and moving apparatus, the body including supporting apparatus for supporting the first joint above the at least one subsequent joints and for providing support of the first joint as it moves with respect to the at least one subsequent joint, the supporting apparatus compensating for weight of the first joint as it moves, the support apparatus for alternately supporting the first joint and then the at least one subsequent joint, the support apparatus initially adjustable to compensate for the weight of the first joint so that the support apparatus is also thereby adjusted to compensate for weight of the at least one subsequent joint.
    Type: Grant
    Filed: December 26, 1997
    Date of Patent: December 14, 1999
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Stephen L. Albright, Leendert Spreij, Jean D. Bearb, Frederick M. Leicht, Michael W. Hayes, John C. Birdwell