System and method for spot check analysis or spot sampling of a multiphase mixture flowing in a pipeline

A system for spot check analysis or spot sampling of a multiphase mixture flowing in a pipeline, comprising:

• means for sampling the multiphase mixture under isokinetic conditions;
• means for flowing the sample of the multiphase mixture in a phase separated or slug-type flow;
• and
• means for detecting a presence of a phase of the phase separated or slug-type flow at a phase detection location.

A system for spot check analysis or spot sampling of a multiphase mixture flowing in a pipeline, comprising:

• a sampling probe for retrieving a sample of the multiphase mixture from a sampling location in the pipeline;
• a differential pressure sensor configured to determine a differential pressure between a pipeline pressure of the multiphase mixture at the sampling location and a probe pressure of the sample in the probe;
• one or more valves coupled with the sampling probe;
• a processor coupled with the differential pressure sensor and the one or more valves and configured to control the one or more valves to provide that the sample is obtained under isokinetic conditions by nulling the differential pressure;
• and
• a conduit coupled with the sampling probe and configured to provide that the sample flows through the conduit in a slug-type flow.