Our light, challenging environment tool strings allow clients to obtain data with minimal impact on the flow. Applications include flow profiling, water or gas entry, leak detection, and Selective Inflow Performance (SIP). Above all, to determine current formation pressure and porousness.

Flow Logging System

Scientific Drilling‘s Flow Logging System (FLS) compact modular design can be run on memory or in real-time. For example, standard sensors include Casing Collar Locator, Gamma Ray, Pressure, Temperature, Spinner Flowmeter, Capacitance, and Fluid Density.

Standard FLS (1.375)

Scientific Drilling‘s Flow Logging System (FLS) provides a high-quality and cost-effective solution to find leaks. Similarly, define the well flow profile and fluid type with a delicate tool string. The compact and modular system can be run in memory mode – MPLT – or real-time – SRO PLT – for continuous memory surface recording. Therefore, in-house tool development has made memory data acquisition possible for over 10 days.


Scientific Drilling’s SlimFlow (production logging system) is designed to access wells with restrictions. Other tools cannot obtain valuable data for the customer. This system hosts a variety of sensors for memory and real-time data gain. As a result, in a tool-string configuration that does not exceed 1.5″ in diameter.

Vulcan™ FLS (1.44)

Scientific Drilling ‘s Vulcan™ FLS 1.44 Flow Logging System (FLS) industry faintest, flask, full-function memory-based production logging tool. This high-temperature system offers a full range of sensors. For example, Casing Collar Locator, Gamma Ray, Pressure, Temperature, Spinner Flowmeter, Fluid Capacitance, Nuclear Fluid Density, and Tuning Fork Density. The service fits HPHT oil and gas well logging and can withstand temperatures up to 600°F (315°C) for limited durations.

Vulcan™ FLS (1.75, 2.25)

Scientific Drilling‘s Vulcan™ FLS 1.75 and Vulcan™ FLS 2.25 Flow Logging Systems (FLS) are extended duration, flask flow logging tools. Both are available in Memory and Surface Readout modes. These high-temperature systems offer a similar suit of sensors to the Vulcan FLS 1.44. The primary use of this larger format tool string achieves a longer duration in very hot wells. Further, the service standard for geothermal wells or gas wells requires a more extended period in the well. Most importantly, they can operate up to 600°F (315°C).