E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/16 (2006.01) E21B 19/06 (2006.01) E21B 19/08 (2006.01) E21B 19/086 (2006.01)
Patent
CA 2263193
Disclosed is a joint compensator for compensating for the weight of a first tubular for connection with a second tubular. A piston is displaceable within a cylinder for permitting displacement of said first tubular downwardly towards said second tubular. A first biasing means is disposed so that as said first tubular moves downwardly during connection of said first tubular to said second tubular. A second biasing means is disposed so that said piston moves within said cylinder in the opposite direction under the action of said second biasing means to lift said first tubular upwardly during a subsequent disconnection of said first tubular from said second tubular. A control means is provided for controlling the force applied by at least said first biasing means as said first tubular moves downwardly. The first and second biasing means may comprise constant force springs or a fluid system.
Le procédé de la présente invention, qui permet de raccorder un premier élément tubulaire à un second élément tubulaire, consiste à utiliser un dispositif pneumatique pour maintenir ledit premier élément tubulaire (101) au-dessus dudit second élément tubulaire (104) et à abaisser ledit premier élément tubulaire (101) en direction dudit second élément tubulaire (104) afin de faciliter le raccordement avec ce dernier. Ledit procédé se caractérise en ce qu'il consiste en outre à faire en sorte que le fluide assurant le fonctionnement pneumatique s'échappe dudit dispositif pneumatique lorsque ledit premier élément tubulaire (101) est abaissé en direction dudit second élément tubulaire (104) et à recharger automatiquement ledit dispositif pneumatique (111, 112), une fois libéré ledit premier élément tubulaire (101). La présente invention se rapporte à un appareil permettant de mettre en oeuvre le procédé décrit ci-dessus, qui comprend un dispositif pneumatique (111, 112; 211, 212) qu'il est possible de déplacer entre une position haute (127) et une position basse (128). Ledit appareil se caractérise en ce qu'il comporte également un organe servant à libérer du fluide pneumatique dudit dispositif pneumatique (111, 112) lorsque, en cours d'utilisation, on fait descendre un premier élément tubulaire (101) vers un second élément tubulaire (104), et un organe (108) pour recharger automatiquement ledit dispositif pneumatique (111, 112), une fois libéré ledit premier élément tubulaire (101).
Albright Stephen Lee
Bearb Jean Donald
Marks & Clerk
Weatherford/lamb Inc.
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