A general term for special mechanical devices used to aid the recovery of equipment lost downhole. These devices generally fall into four classes: diagnostic, inside grappling, outside grappling, and force intensifiers or jars.
What is fish in oil and gas?
Fishing (in the oilfield sense) refers to the recovery of unwanted material left in the wellbore. Numerous situations can occur that require fishing: Items dropped into the hole from the rig floor. Failure of surface equipment, especially pumps, which allows the hole to cave in and stick the drill string.
What tools do oil rig workers use?
While the array of tools used can seem overwhelming at first, these five play a vital role in reducing environmental impact, costs and accidents.
- Mud Cleaners. Mud separated from the cuttings is used to cool down the drill bit. …
- Stabbing Guides. …
- Shale Shakers. …
- Degassers. …
- Sand Pumps.
What is fishing operation in drilling?
In oil-field operations, fishing is the technique of removing lost or stuck objects from the wellbore. The term fishing is taken from the early days of cable-tool drilling.
Why is it called a tackle box?
They are used for lifting and pulling. The term fishing tackle came from this term, and originally meant the lines and pulleys used to handle nets. From there it came to mean fishing equipment in general. So a tackle box is used to store fishing gear.