Fusible Safety Disposal Connector Tool

Abstract

The invention belongs to the field of oil and gas well exploitation completion operation equipment development and relates to a fusible type safety release sub tool. The fusible type safety release sub tool comprises a cable fixing portion and a tool body; and the cable fixing portion comprises slips fixing nuts, cable slips and jackscrews. Cavity body design exists in the body; an electrode, an electrode fixing bolt fixing the electrode and a cable cutting device are arranged; and the cable cutting device comprises a current controller and an inner jet cutter. The tool is safe and effective, the salvage difficulty is reduced, and cable losses are reduced.

Description

technical field [0001] The invention belongs to the field of cable operations such as cable perforation and well logging operations in the development and completion of oil and gas wells, and in particular relates to a fusible safety drop-off joint tool, which can realize A tool that is automatically fused at the upper end of the fishing head so that it can be dropped. Background technique [0002] At present, in the cable operation process of oil and gas field development at home and abroad, there are mainly two ways to realize the automatic release after the drill is stuck. Hand joints, often in the construction of horizontal wells or directional wells, due to the excessive well inclination, the friction resistance of the cable is too large, and the hand pull force set by the hand joint is 1.5T (actually the setting is extremely inaccurate, and ground pull force is required every time test, sometimes pulling continuously or when there is no need to drop the hand), and the...

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Problems solved by technology

[0002] At present, in the cable operation process of oil and gas field development at home and abroad, there are mainly two ways to realize the automatic release after the drill is stuck. Hand joints, often in the construction of horizontal wells or directional wells, due to the excessive well inclination, the friction resistance of the cable is too large, and the hand pull force set by the hand joint is 1.5T (actually the setting is extremely inaccurate, and ground pull force is required every time test, sometimes pulling continuously or when there is no need to drop the hand), and the safe pulling force of the steel wire cable is 5.8T, it is difficult to drop the hand normally under the safe pulling force; the other is developed by foreign countries, relying on the release of the ignition charge The hand-off device for hydrofluoric acid fusing cables. The reliability of this tool is not high, especially when it is unstable at high temperature. The released hydrofluoric acid will corrode the fishing head at the end of the gun and reduce its tensile force, and cause certain pollution to the wellbore

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