Milling through a casing collar

Hello Folks,

We are planning to carry out a cased hole sidetrack which entails setting a Whipstock using the Trackmaster Assembly with Fastrack mill. The following are the challenges we foresee.

  • We don't have a casing tally: This means there is possibility of milling the casing collar if casing collar locator isn't run.
  • Has anyone milled a collar? Did it take significant longer time than the usual or what was the effect on the milling assembly?
  • Has any one milled a window without running a CCL or having a casing tally?
  • Has anyone milled a casing without cement?

I will appreciate your response in anticipation.

12 Answer(s)