The Low Tolerance Spec

The United Seal & Rubber Co. Blog

Crown Bumper Systems for Drilling Rigs

Posted by Virgil Alonso on Tue, Dec 17, 2013 @ 12:12 PM

Crown Bumper

Why is someone who is out of Atlanta GA writing a blog about Crown Bumpers that are used on drilling rigs?  The answer is two fold...  One, I spent a few years living in Mississippi and learned to appreciate the oil & gas market.  I spent quite a bit of time traveling the great states of Louisiana and Texas and had the great pleasure of meeting folks who worked in the energy, oil and gas market.  I made friends with folks who would spend weeks away from their families working on rigs.  Big sacrifices are made on the parts of folks who work in this industry.  Two, we are a Parker distributor and I'm always interested and excited when Parker or any of our supplier has new product offerings.  This brings me to the topic of today's blog; Parker's Crown Bumper System.

Parker's Crown Bumper System is a patented energy management system.  It has been designed to replace existing bumpers that are often made from wood and found on drilling rigs.  United Seal & Rubber is proud to offer this product because it reduces down time, reduces the risk of damage and offers our customers ease of installation.  We realize that downtime can cost rigs a lot of money.  All three of the previous mentioned features of this Crown Bumper System are intended to reduce downtime and help the oil rigs make money.  Instead of the wooden design, Parker designed these bumpers out of special rubber compounds.  These rubber bumper pads can absorb up to 60% of the kinetic energy created by a post breaking bump of the crown by the traveling blocks. The system has been tested to withstand a 25,000 Ib bump at 3.68 ft. per second with no permanent deflection.  They were also tested to withstand a 56,000 Ib. bump at 2.94 ft. per second with only 1/8" permanent deflection. 

Other product features include: Reduction of damage caused by metal-to-metal or metal-to-wood contact (collision) * Reduction of down time resulting in welding repairs or wooden bumper replacements * Easy Installation * Increased life of bumper pads * Requires no maintenance * Optional low temperature compounds for Arctic applications

It is recommended that bumper pads are replaced every 3 - 5 years or when they show signs of needing to be replaced.  Aside from looking for cracks or other visual signs of damage, recommended inspections (annual at a minimum) include: Looking for rusty or cracked welds * Cracks or deterioration of rubber * Bolts, nuts & cotter pins - check for rust, bent or missing * Wire Rope - check that clamps are tight, no cuts or kinks and for rust. 

Recommended post - impact inspection includes: Bent tubing * Bent bolts * Pieces of rubber missing * Cracks in welds * Wire Rope - check that clamps are tight, no cuts or kinks and for rust. 

United Seal & Rubber is proud to offer Parker's Crown Bumper Systems for Drilling Rigs.  For Crown Bumper Installation recommendations, please visit our website at: ttp://, look under the resource tab for a complete Parker brochure that describes Crown Bumper Installation tips.


Tags: Specification Tips, Quality of Design, Value Engineering, Vendor Selection