Patents Assigned to Compagnie Maritime D'Expertises
  • Apparatus for internally checking well pipe bore and for automatically sealing leaks therein
    Patent number: 3943982
    Abstract: Apparatus for checking the bore and for plugging a pipe comprises a frame movable along the interior of the pipe, the frame carrying means for detecting a deviation in the bore of the pipe, means responsive to an overpressure of fluid in the pipe in a direction opposite to that in which the apparatus is intended to move, and a movable control part responsive to the detection of a deviation and of an overpressure for operating locking means for locking the apparatus relative to the pipe and sealing means for sealing the pipe.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: March 16, 1976
    Assignees: Compagnie Francaise des Petroles, S.A., Etudes Petrolieres Marines, S.A.R.L., Ateliers et Chantiers de Bretagne - A.C.B. - S.A., Compagnie Maritime d'Expertises, S.A., Compagnie Generale pour les Developpements Operationnels des Richesses sour-Marines (Doris) S.A.
    Inventor: Michel G. Lecordier