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Subject: Downhole corrosion logging tools
Question: Looking for some advice on downhole
corrosion logging tools which give more detailed information than
calipers, for example depth of pitting/ damaged areas to establish the
criticality of the pipe / tubing condition
What is available on the market to measure such ?
Senior Well Engineer (Well Examination & Technology)
Subject: 16Cr velocity strings - metallurgy problems
Question: I am looking for any examples/lessons learned in running 16Cr velocity strings (or coil work strings) - in relation to metallurgy problems. There have been reports of pinhole leaks in Alaska, and other operators have reported problems with this material. I am looking for more detail on how these problems arose, and in what environment. In the next year we planning on running a 16Cr v-string in an old HPHT well in the North Sea which has low CO2, low H2S & supersaturated brine in most minerals.
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Answer : The following SPE Paper will not address all your concerns but may help:
SPE 130632-MS - Deliquification of South Texas Gas Wells Using Corrosion Resistant Coiled Tubing: A Six Year Case History (2010)
Global Advisor - Coiled Tubing
Halliburton, Eastern Hemisphere Technical Support Group
Useful data can be located - here