A riser connector

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/00 (2006.01) E21B 17/01 (2006.01)

Patent

CA 2737029

A system for introducing upwardly a flexible member into a tubular fixed structure with a sleeve surrounding the flexible member in the region where the flexible member attaches to the tubular fixed structure. The system comprises means for enabling the flexible member to be drawn upwardly into a bore of the tubular fixed structure, said bore being defined by an inner surface of said tubular structure, clamping means on the sleeve temporarily clamping the sleeve and flexible member together, and release means on the sleeve adapted to automatically release the clamping means when the sleeve attains a fixed disposition with respect to the tubular fixed structure, such as to permit continued movement of the flexible member with respect to the sleeve. The clamping means comprise a plurality of locking dogs attached to and radially moveable with respect to the sleeve between an inner locking position in which they engage with the flexible member, and an outer release position in which they are disengaged from the flexible member. The release means comprises a latch ring disposed on a substantially cylindrical surface so that it may be deflected axially along said surface on contact between the sleeve and tubular fixed structure to permit release of said locking dogs.

La présente invention concerne un système destiné à introduire vers le haut un élément souple dans une structure tubulaire fixe, avec un manchon entourant l'élément souple dans la région où ledit élément souple est lié à la structure tubulaire fixe. Ledit système comprend les éléments suivants : un moyen permettant de tirer vers le haut l'élément souple dans un trou de la structure tubulaire fixe, ledit trou étant défini par une surface interne de ladite structure tubulaire; un moyen de serrage sur le manchon serrant temporairement ensemble le manchon et l'élément souple; un moyen de libération sur le manchon conçu pour libérer automatiquement le moyen de serrage lorsque le manchon atteint une disposition fixe par rapport à la structure fixe tubulaire, de manière à permettre le mouvement continu de l'élément souple par rapport au manchon. Le moyen de serrage comprend une pluralité de taquets d'enclenchement liés au manchon et mobiles radialement par rapport audit manchon entre une position de verrouillage interne (selon laquelle ils viennent en contact avec l'élément souple) et une position de libération externe (selon laquelle ils se désolidarisent de l'élément souple). Le moyen de libération comprend une couronne à clapet placée sur une surface essentiellement cylindrique, de sorte qu'elle puisse être déviée axialement le long de ladite surface lors de la mise en contact du manchon et de la structure tubulaire fixe, pour permettre la libération desdits taquets d'enclenchement.

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