Vibrational damper with removable lugs

A shock absorber connectable between a rotary drive shaft and a rotary driven shaft comprising:

• a first plate including a plurality of removable lugs;
• a second plate;
• a housing fixedly secured to the second plate, the housing having an outer wall forming a hollow center portion and a plurality of openings extending through the outer wall to the hollow center portion, each opening of the plurality of openings having first and second positive stops, the removable lugs extending at least partially through the openings and configured to selectively engage against opposing sides of the openings in a manner that limits an amount of rotation of the first plate relative to the second plate, the removable lugs being removable and replaceable from the first plate through the openings;
• and
• an elastomeric member disposed in the housing between the first plate and the second plate, the elastomeric member being configured to absorb vibration from the second plate
• wherein the first and second positive stops are composed of a first material and the plurality of removable lugs is composed of a second material softer than the first material.

A method of repairing a shock absorber disposed between a drill string and a top drive comprising:

• removing a first plate having a removable lug from an elastomeric element disposed in a hollow housing having a plurality of openings formed therein, the removable lug extending at least partially through one opening of the plurality of openings;
• removing the removable lug from the first plate through the one opening of the plurality of openings;
• inserting a replacement lug through the one opening of the plurality of openings, the replacement lug extending at least partially through the one opening;
• and
• attaching the first plate to the elastomeric element in the housing to secure the replacement lug in place extending partially through the one opening.