Sunrise petro : What is perforated casing?

‌Perforated casing is a crucial step in completing oil and gas wells. It involves creating small holes, or perforations, in the casing and cement of a well to establish a connection between the reservoir and the production tubing.

Here are some things to consider when buying perforated casing:

Perforation strategy: The ultimate success of the well—its productivity and life expectancy—rests on making the best possible connection between the wellbore and formation.

Margins: Reduce distortion by keeping side margins to a minimum

Open areas: Perforated patterns produce open areas from 2% to 80%. If possible, stay under 70% as extreme open areas can increase distortion in the material

Here are some uses of perforated casing:

Flow communication: A perforating gun "punches" a pattern of perforations through the casing and cement sheath and into the productive formation to provide effective flow communication between a cased wellbore and a productive reservoir

Connection support: A connection support for easy flow of oil or gas

Casing layer: A common casing layer for pipe-core wire wrapped well screens

Supporting pipe: A supporting pipe for sand control systems in drilling oil or water wells