Thrust bearing for down-hole tool

F - Mech Eng,Light,Heat,Weapons – 16 – C

Patent

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Details

F16C 27/08 (2006.01) F16C 35/06 (2006.01) F16C 41/02 (2006.01) E21B 4/00 (2006.01)

Patent

CA 2361746

There is disclosed an improved bearing and particularly an improved bearing assembly (15, 15A), eg. a thrust bearing assembly, which may be used in down- hole applications, such as down-hole drilling applications. Thrust bearing assemblies for use in down-hole applications have the conflicting requirements of a thick shaft assembly and high axial load bearing capacity in a small crosssection. The invention, therefore, provides: a bearing assembly (15, 15A) having at least two bearing elements (400, 400A) spaced by a first body (500, 500A), the first body (500, 500A) having means for flexing. Thus when a load is applied to the bearing assembly (15, 15A) the first body (500, 500A) is caused to flex. In an embodiment the flexing means comprise at least one circumferential groove or notch (510, 510A) formed on the first body (500, 500A).

L'invention concerne un palier amélioré et plus spécialement un ensemble à palier amélioré (15, 15A), par exemple un palier de butée amélioré. L'ensemble palier peut être utilisé dans des applications de fonds, telles que des applications de forage de puits. Les ensembles paliers de butée utilisés dans le forage de puits présentent des besoins conflictuels : un ensemble arbre épais et une grande capacité de palier de charge axial dans une petite section transversale. L'invention concerne un ensemble palier (15, 15A) répondant à ces besoins et comportant au moins deux éléments palier (400, 400A) espacés par une premier corps (500, 500A), ce premier corps (500, 500A) comportant des moyens de flexion. Ainsi, l'application d'une charge à l'ensemble palier (15, 15A), entraîne une flexion du premier corps (500, 500A). Dans un mode de réalisation, les moyens de flexion comprennent au moins une rainure ou une encoche (510, 510A) circonférentielle formée sur le premier corps (500, 500A).

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