GLOSSARY

packer with an element that inflates by means of gas or liquid pumped from the surface through a line. It is deflated by means of slots that can be opened to allow the gas or liquid to flow out. They are used when a temporary packer is needed in a hole.

a control head for injecting coiled tubing into a well that seals off the tubing and makes a pressure tight connection

Space occupied in a product container.

The process of adding electrons to, or removing electrons from, atoms or molecules, thereby creating ions. High temperatures, electrical discharges, and nuclear radiation can cause ionization

hydraulic tool used in conjunction with a jar and made up on the fishing string above the jar to increase the power of the jarring force.