TUBEWIRE INJECTION BUCKLING MITIGATION Russian patent published in 2018 - IPC E21B17/20 E21B19/22 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to a tubewire injection system for injecting tubewire into coiled tubing. Tubewire injection system for injecting tubewire into coiled tubing comprises a tubewire injector, coiled tubing having an inner diameter and an open whip end into which the tubewire is injected and a tubewire buckling mitigation assembly located between the injector and the coiled tubing. Tubewire buckling mitigation assembly comprises a passageway which receives the tubewire from the injector. Said passageway comprises: a small diameter passage having an inner diameter that inhibits buckling of the tubewire; an intermediate diameter section having an outer diameter that permits limited buckling of the tubewire; a first tapered transition section located between the small diameter passage and the intermediate diameter section; and a second tapered transition section located between the intermediate diameter section and the open whip end, and providing a tapered transition that opens from the intermediate diameter section to the open whip end.

EFFECT: technical result is the generation of transverse forces, which counteract cable buckling.

13 cl, 4 dwg