Exploring The Mechanism Of Coiled Tubing Lock-Up

2nd November 2017                   COILED TUBING DRILLING                          

Author: Richard Stevens

Lock-up in CT is like death and taxes, it’s an inevitability of life. If you are going to try and set weight at the end of CT, the amount of weight you will be able to set will ultimately be governed by lock-up.


The key to running a successful operation is understanding how and why lock-up occurs, comprehending factors that influence it and planning the operation to minimise the effect of those factors. These are the topics I Intend to cover in this series of blog articles.


Holding a length of coiled tubing in your hand is an instructive experience. In terms of size, weight and stiffness, it’s comparable with scaffold tubes used in the construction industry. It’s readily apparent that . . . 

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