Oilfield Glossary

| Simplify your engineering life
Browse by letter:

Note: Definitions provided on this website are for reference purposes only. Engineers and professionals should independently confirm all information using industry standards.

Impression block

An impression block (or lead impression block, LIB) is a flat-bottomed tool faced with soft lead. It is run down to the top of a fish or obstruction and set down with weight.

The soft lead deforms around the object, creating a mold or 'impression' of its shape. When retrieved, this impression helps the fishing engineer identify what the object is and its orientation, aiding in the selection of the correct grapple or fishing tool.

Connected Calculations

No linked calculation

Glossary explainers

No linked glossary item

Please provide feedback if you think there is an error