Jiskoot fast loop sampling system

Applications

• Crude oil
• Condensate
• Low-temperature liquid hydrocarbons
• Refined products
• Hazardous liquids

Benefits

• Low risk of interbatch sample contamination
• Operator friendly and simple to maintain
• Low installation cost

Features

• 0.035% measurement uncertainty*
• Compliant with ISO, Energy Institute (EI)—formerly Institute of Petroleum (IP), API, and ASTM International

* Based on data from more than 200 water injection proving tests

How it improves performance

The Jiskoot™ fast loop sampling system was developed in response to demands for increased accuracy with reduced uncertainty and maintenance costs. It has a lower measurement uncertainty and greater accuracy than a probe sampler system.

Each fast loop sampling system features a pumped 1-in or 2-in loop flowing in parallel with the main pipeline. The loop size is selected as part of the design process to maximize sample representivity and ensure that sufficient velocity exists to maintain homogeneity of the fluids throughout the sampling system.

All Jiskoot fast loop sampling systems are designed in accordance with international sampling standards and supplied with a guarantee of compliance and a warranty.

How it works

These Jiskoot systems can be designed for 8- to 52-in pipelines. They can be installed in the pipeline through a seal housing, enabling installation by hot tapping and removal under process conditions for pigging. A Jiskoot ByScoop™ loop extractor is mounted in the central third of the pipeline and designed to have no water traps. Flow can either be returned to the pipeline at the point of extraction or at a suitable point downstream. A fullbore cell sampler, flow indicator, and isolation valves are mounted in the loop. The cell sampler isolates and discharges a grab sample directly through the bottom of the sampler into a sample receiver.

The main components of the fast loop sampling system are mounted inside a receiver housing, enabling them to be easily isolated and serviced without needing to shut down the main pipeline. The receiver housing can be heated if required and may contain multiple receivers with manual or automatic changeover. If compliance with ISO 3171 and ASTM D4177 is required, the system is fitted with a sample-receiver weighing system that continually measures the sampling system performance. Sample receivers can be removed to the laboratory, where their contents can be remixed prior to sample analysis. A signal from a suitable flowmeter is used to flow-proportionally pace the sampling system.