Roller belleville spring damper

Details Roller belleville spring damper Roller belleville spring damper

E - Fixed Constructions

21

B

255/28

E21B 17/07 (2006.01) E21B 17/10 (2006.01)

Patent

CA 1157008

ROLLER BELLEVILLE SPRING DAMPER Abstract of Disclosure: A double acting damper for use in rotary drilling includes a splined tubular telescopic joint and employs plural paralleled stacks of double acting series stacked roller Belleville spring washers in an annular pocket be- tween the inner and outer tubular members of the joint. The springs, spline and telescopic bearings are in an oil filled volume sealed from the outside by a pressure seal at the lower end of the damper and a floating seal at the upper end. Electric and magnetic means are provided to check on the condition and quantity of the lubricant.

371003

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