FISHING TOOL Russian patent published in 2006 - IPC E21B31/18 

FIELD: oil industry, particularly for fishing for or freeing objects in boreholes or wells.

SUBSTANCE: fishing tool comprises hollow body with cylindrical recess made in inner body surface and reversed funnel connected to lower body end. Fishing slips with inclined sections are arranged in the recess. The fishing slips consist of two parts. Fishing slips are pivotally connected with each other from the first sides and are urged inwards by connection compression spring from the second sides thereof.

EFFECT: simplified structure and increased gripping reliability.

2 dwg