What is fish in oil and gas?

Anything left in a wellbore. It does not matter whether the fish consists of junk metal, a hand tool, a length of drillpipe or drill collars, or an expensive MWD and directional drilling package.

What is a fish in an oil well?

In technical terms, a fish can be any object which has been lost or stuck in a borehole, and has a serious negative impact on well operations. Fishes can be anything, whether that is a drill string that has come away, a bit cone, or even a hand tool that has been inadvertently dropped into the well.

What is fish in drilling?

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 are fishing tools in oil and gas?

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 down hole fishing?

Fishing tools used to mill or cut objects downhole for a specific reason. Whether you are milling up a fish that could not be retrieved to surface, cutting casing or tubing in an intervention operation, or performing a washing over procedure, NOV Downhole has the tools for the job. Remedial and Repair.

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What are the tools used in fishing?

Fishing tackle is the equipment used by anglers when fishing. Almost any equipment or gear used for fishing can be called fishing tackle. Some examples are hooks, lines, sinkers, floats, rods, reels, baits, lures, spears, nets, gaffs, traps, waders and tackle boxes.

What is wash pipe in drilling?

The wash pipe is used when tubulars become stuck, where drilling mud is pumped down the wash pipe to wash away debris to free the stuck tubulars, allowing drilling operations to resume without disruption to the project. …

What is a drilling jar?

What is a drilling jar and how does it work? A jar is a tool that sits on the drill string. If the drillstring (BHA) gets stuck in the hole, the jar can help knock it loose by generating quick, sharp hammer-like blows.

What is differential sticking in drilling?

Differential-pressure pipe sticking occurs when a portion of the drillstring becomes embedded in a mudcake (an impermeable film of fine solids) that forms on the wall of a permeable formation during drilling.

What is a downhole tool?

Downhole Tools are pieces of oilfield equipment that are used during well drilling, completion and intervention or well workover activities and helps the oil well in optimizing the production levels and maintain a continuous flow from a reservoir.

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