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[[file:formation-fluid-pressure-and-its-application_fig5-16.png|thumb|350px|{{figure number|1}}Formation pressure is measured by the formation sampler when it is extended from the tool to contact the formation.<ref name=ch05r5>Dahlberg, E., C., 1994, Applied Hydrodynamics in Petroleum Exploration, 2nd ed.: New York, Springer-Verlag, 295 p.</ref> Copyright: Springer-Verlag.]]
 
[[file:formation-fluid-pressure-and-its-application_fig5-16.png|thumb|350px|{{figure number|1}}Formation pressure is measured by the formation sampler when it is extended from the tool to contact the formation.<ref name=ch05r5>Dahlberg, E., C., 1994, Applied Hydrodynamics in Petroleum Exploration, 2nd ed.: New York, Springer-Verlag, 295 p.</ref> Copyright: Springer-Verlag.]]
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The repeat formation tester (RFT) tool was designed to measure formation pressure quickly and accurately. It measures pressure at specific points on the borehole wall. The diagram below shows a typical RFT tool. Formation pressure is measured by the formation sampler ([[:file:formation-fluid-pressure-and-its-application_fig5-16.png|Figure 1]]) when it is extended from the tool to contact the formation. Fluid samples from the formation can also be taken with the tool.
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The [[Wireline formation testers|repeat formation tester (RFT)]] tool was designed to measure formation pressure quickly and accurately. It measures pressure at specific points on the borehole wall. The diagram below shows a typical RFT tool. Formation pressure is measured by the formation sampler ([[:file:formation-fluid-pressure-and-its-application_fig5-16.png|Figure 1]]) when it is extended from the tool to contact the formation. Fluid samples from the formation can also be taken with the tool.
    
==Differences between RFTs and DSTs==
 
==Differences between RFTs and DSTs==
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