Admitting a hanger liner failure?

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hanger liner failure?

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As a liner hanger engineer i'd like to know where they said anything about a liner system in the article.

I'm still confused about how cement is poured in the annulus between the casing and the drill bore.

If it was my design, the smaller diameter casing would have some holes 2/3 down the pipe. The rubber hanger liner would have been installed on the outside of this piece of casing above the cement flow holes. A tool is inserted which seals off below and above these cement casing holes. Pump the cement. The hanger liner is pushed upward by the cement, until it is compressed at the joint between the two different sized casings. Let the cement set and then drill through the thin layer of residual cement left in the drill pipe.

I don't mean to discredit the chemistry behind cement...I'm still trying to understand the delivery and utilization.