Apparatus for internally checking well pipe bore and for automatically sealing leaks therein

US3943982A · kind A · utility

Assignees

• Compagnie Francaise Des Petroles · FR
• Etudes Petrolieres Marines, S.A.R.L. · FR
• Ateliers et Chantiers de Bretagne-ACB · FR
• Compagnie Maritime D'Expertises · FR
• Compagnie General pour les Developpements Operationnels des Richesses Sous-Marines CG Doris · FR

Inventor

• Michel G. Lecordier · Marseille, FR

Key dates

• Filing date: Aug 19, 1974
• Grant date: Mar 16, 1976
• Expiry date: Aug 19, 1994

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L55/1283
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

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.