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Keywords: siltstone
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Proceedings Papers

Paper presented at the IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, August 25–27, 2008
Paper Number: SPE-115117-MS
... has been drilling gas wells in the Middle Indus basin of Pakistan since 1994. Drilling in this area is very challenging due to inter layered geological sequence that consists of clay, shale, limestone, with sand and siltstone ( Figure 1 ). Wells are normally drilled vertically through these geological...
Proceedings Papers

Paper presented at the IADC/SPE Asia Pacific Drilling Technology, September 7–9, 1998
Paper Number: SPE-47814-MS
.... The current work has identified characteristics of the problem, its economic significance, its possible causes, and the best historical field practices for addressing it. P. 261 bit design shale drilling rate siltstone overpressured shale deep shale bit performance oil-based mud wellbore...

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