Patents Assigned to Martin-Decker Company, a division of Gardner-Denver
  • Drilling fluid compensation device
    Patent number: 4099582
    Abstract: In an offshore oil well system wherein a floating well platform is connected through a telescoping cylindrical member to a marine riser extending down to the drilling area, the telescoping cylindrical member being mounted for slidable, sealable movement within the top of the marine riser, said movement occurring as a result of heave of the floating platform due to wave and tide action, a drilling fluid compensator for compensating for a change in the flow of drilling fluid out of the telescoping cylindrical member into the return system.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: July 11, 1978
    Assignee: Martin-Decker Company, a division of Gardner-Denver
    Inventor: Leo A. Bell