We have succeeded in using drone to inspect the inside of a flare stack device (height 60m x inner diameter 2m to 6m) in an oil company.

This timeis different from before,the diameter of chimeny is less than 2m that caused distance between drone and wall to become close.

But we completed the inspection  safely.

We are able to carry out inspection that not only large-diameter ones but also small-diameter chimneys and ducts, etc.
We will propose better services in the future.