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Cased Hole DST

Cased Hole DST

In a cased hole drillstem test, where a closed system is desirable due to a high pressure, high temperature environment, this set of tools can be run and activated using pressure. The Cased Hole Pressure Operated tools can be run in combination with a TCP/DST program and can support operations with circulation and well control.

Multi-Cycle Annular Pressure Operated DST

Cased hole drill stem tests (DST) are conducted after the well has been cased and the formation of interest is behind casing. The casing is perforated by wireline perforating guns or with tubing conveyed perforating (TCP) guns connected to the bottom of the DST string to open the casing to the formation. The DST tool assembly is run at the bottom of the temporary production tubing or drill pipe (work string) and used for downhole well testing (inflow testing) and stimulation (injection).


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