Cylindrical bars that support the elevators and attach them to the hook.

Also called elevator bails.

See elevator links

A device used to connect long lines of pipe to allow the pipe joints to expand or contract as the temperature rises or falls.

A temporary plug set of a psa, landed in a production packer to convert it to a bridge plug.

An elastic material made of synthetic rubber or plastic; often the main component of the packing material in blowout preventers and downhole packers.

The decomposition of a chemical compound brought about by the passage of an electrical current through the compound or through the solution containing the compound.

Corroding action of stray current is caused by electrolysis

The percentage of the bulk volume of a rock sample that is composed of interconnected pore spaces that allow the passage of fluids through the sample.

See porosity.

See electric well log

Abbr: equivalent circulating density.

A measure of the ability of a single fluid to flow through a rock when another fluid is also present in the pore spaces.

Compare absolute permeability, relative permeability.