- #1
hogwildwa
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- TL;DR Summary
- During a fracturing operation, fluid leaves the pipe through a perforated cemented sliding sleeve. We have noticed that the pipe is being deformed a few feet on either side of the sleeve. I am trying to figure out what is causing the deformation.
The situation is that we have 4.5 inch diameter pipe with a 300,000 lbf yield rating installed in a horizontal completion. The pipe is cemented in place but it is very likely that the one side of the pipe may not have any cement in it. During the fracturing operation, a sleeve is opened and fluid is pumped out the casing at a pressure of 5300 psi. The reservoir pressure that would help support the cemented portion of the pipe is 1700 psi. We have noticed that the pipe deforms on either side of point where the fluid exits the casing. I believe that the incomplete cement support is allowing high pressure on one side of the pipe which is producing a force/bending moment that is deforming the pipe. I tried some simple calculations but I am not sure that I am looking at the problem correctly. Attached is my evaluation. I would appreciate any comments.