Failure analysis of drilling equipment like Top sub , float sub

[goodbadgood]

hi

i am interested to get some useful information of failures related to drilling equipment.

Please guide me from where i can get some case studies or literature?

I shall be thanful

 

[maripali]

Please check the Darvaza, Door to Hell.

https://en.wikipedia.org/wiki/Door_to_Hell

 

[jjwamp]

There is some good information on drilling & fishing tools. Not really failure related but perhaps useful.

http://www.tangohire.com.au

or

http://tangohire.com.au/fishing-tools/