During drilling and completion and downhole operations, the normal drilling, workover and completion operations are interrupted due to stuck or broken drill pipe, drill collar, casing, tubing string, bit cone, logging instrument or cable, cable wire rope, packer, sand setting, serious lost circulation, well collapse and blowout. It is necessary to use fishing tools or take special measures to remove the lost circulation, collapse and stuck . spray to resume normal operation. The operations and processes to remove leakage, collapse, jamming and spraying are called "fishing".
1. According to Fishing tubing
Soft fishing: wire (rope) / cable
Hard fishing: tubing / drill pipe / coiled tubing
2. According to occlusal relationship
Inward fishing: fishing spear / pin tap / outer hook
Fishing out: fishing barrel / fepin tap / inner hook / fishing basket
3. Classification of fishing tools
Fishing out: Retractable fishing barrel, fepin tap, inner hook, three ball fishing device, etc.
Inward fishing: pin tap, retractable fishing spear, casing fishing spear, outer hook, inverted buckle, fishing spear.
Others: strong magnetic salvage, reverse circulation strong magnetic salvage, Fishingcup, reverse circulation strong magnetic Fishingbasket, reverse circulation, circular Fishingbasket.