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Downhole Sampling

Downhole sampling involves capturing reservoir fluid samples at reservoir conditions. To obtain accurate compositional and PVT analyses of these samples, the recovered samples must remain in downhole conditions. Special chambers compensate for the pressure drop as the samples are returned to the surface.

  • Cased Hole Field Transfer Unit (FTU) (264 KB PDF)
    Workstation for transferring single-phase reservoir fluid samples into transport cylinders and validating them; samples can be transferred in less than 1 h without compromising quality.

  • Compact Production Sampler
    Mercury-free, positive-displacement, electrically actuated bottomhole reservoir fluid sampling tool for capturing conventional bottomhole samples while production logging.

  • Data Recording Sampler (119 KB PDF)
    A small-diameter recorder that fits into any single-phase reservoir sampler. Accurately measures and records pressure and temperature data during bottomhole sampling operations.

  • MDT Openhole Sample Transfer Equipment (MSTE) (452 KB PDF)
    Heating and agitation system that recombines the liquid and gas phases of samples retrieved from an open hole with MDT Modular Formation Dynamics Tester MSTE.

  • Nonreactive Reservoir Sampler (76 KB PDF)
    Single-phase reservoir sampler modified to allow chemically representative samples to be obtained during bottomhole sampling operations.

  • Single-Phase Bottomhole Sampler Carriers (SCAR) (94.2 KB PDF)
    Carriers run with the DST string; they obtain high-quality PVT samples while reducing rig time and risks by eliminating use of the slickline.

  • Single-Phase Multisample Chamber (SPMC) (70.7 KB PDF)
    Sampling system used with the MDT Modular Formation Dynamics Tester during openhole logging; up to six SPMC tools can be run with each MDT multisample module.

  • Single-Phase Reservoir Sampler (SRS) (81.8 KB PDF)
    System for all subsurface sampling that maintains retrieved samples in an unaltered single-phase condition above reservoir pressure.

  • Slimline single-phase reservoir fluid sampler (SLS) (321 KB PDF)
    Advanced sampler that maintains the sample in a single-phase condition and above reservoir pressure as the tool is retrieved from the well.


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