The uses to which burst discs are put in the oilfield are ever expanding. They
are in circulation subs, motor head assemblies, fishing tools, expansion packer
retrieval, safety heads, triggers, pipe isolation and several other special
applications. Most of these, apart from the safety heads, have little to do
with the original purpose of a burst disc as used for example on pipelines
or in petrochemical plant, which is essentially as a safety release for
over-pressure build-up. Oilfield applications are instead using burst discs
as specific triggers to enable particular operations.