E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/07 (2006.01)
Patent
CA 2284516
A rotary and longitudinal shock absorbing apparatus (1) with a mandrel (2) therein is connected to a drill string assembly to absorb abnormal longitudinal shocks and abnormal torsional shocks by cooperating hydraulic and mechanical means, while allowing communication of drilling fluid through the body of the apparatus (1). The construction of the apparatus (1) is such that torque shock absorbing action is independent of the longitudinal shock absorbing action and the apparatus (1) provides balanced internal and external pressure to permit its operation at all levels of hydraulic pressure.
L'invention concerne un appareil amortisseur rotatif et longitudinal (1), comprenant un mandrin (2) relié à un ensemble colonne de forage afin d'absorber les chocs longitudinaux et les chocs de torsion anormaux, par l'intermédiaire d'organes hydrauliques et mécaniques solidaires, tout en permettant à une boue de forage de circuler à travers le corps dudit appareil (1). L'agencement de cet appareil (1) est tel que l'amortissement de couple est indépendant de l'amortissement longitudinal, l'appareil (1) fournissant une pression intérieure et extérieure équilibrée afin de pouvoir fonctionner à n'importe quel niveau de pression hydraulique.
Anderson Edwin A.
Riches Mckenzie & Herbert Llp
LandOfFree
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