Apparatus for internally checking well pipe bore and for automatically sealing leaks therein
AssigneesCompagnie Francaise des Petroles, Etudes Petrolieres Marines, S.A.R.L., Ateliers et Chantiers de Bretagne - A.C.B., Compagnie Maritime d'Expertises, Compagnie Generale pour les Developpements Operationnels des Richesses sour-Marines (Doris) S.A.
InventorMichel G. Lecordier
Life of this patent
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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.
Claims14
In an apparatus for plugging the bore of a pipe, and including a frame movable along the interior of a pipe, means for locking the apparatus relative to the pipe, means for sealing the pipe, and control means movable relative to the frame and operably connected to the locking means and the sealing means, the improvements comprising:
- a) means for detecting a linear deviation greater than a preset value in the bore of the pipe, and b) means responsive to a fluid overpresssre exerted in a direction opposite to the direction of movement of the apparatus along the pipe, c) the locking means and the sealing means being operable by the movable control means in response to the deviation detecting means and the overpressure responsive means.
Dependencies are inferred from the claim text.