E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/16 (2006.01) E21B 21/01 (2006.01)
Patent
CA 2393752
A power tong (25) including a dividable spinner and torque tong (1) for spinning in and tightening of a first pipe (20) into a second pipe (21), and an underneath located dividable back up tong (10) for fixedly retaining the second pipe (21) is disclosed. The tongs (1, 10) are axially moveable towards and away from each other. A liquid lock (35) is provided between the spinner and torque tong (1) and the back up tong (10), and a suction for evacuation from the liquid lock (35) the liquid that drains from the pipe (20) during a disconnecting operation between the joints of the pipes (20, 21).
L'invention concerne une clé de vissage à commande pneumatique (25) qui comporte une clé tournante indépendante (1) conçue pour introduire par rotation et pour serrer un premier tuyau (20) dans un second tuyau (21), et une clé de renfort indépendante (10) située sous la base, conçue pour retenir de manière fixe le second tuyau (21). Les clés (1, 10) sont axialement mobiles en direction l'une de l'autre ou en direction contraire. Un verrouillage hydraulique (35) est situé entre la clé tournante (1) et la clé de renfort (10), et une unité d'aspiration est conçue pour évacuer du verrouillage hydraulique (35) le liquide qui s'écoule du tuyau (20) au cours d'une opération de séparation entre les joints des tuyaux (20, 21).
Mccarthy Tetrault Llp
Pevatec As
LandOfFree
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