Your Partner in Automatic Sampling & Analyzers

VCA*

ISO:9001

Member of ISO-3171 committee

sampling-blending

Automatic Gas Sampling

FlowExpected Accuracies
ISO/API compliant system*
System
Sampling Gas 0,150% Automatic Gas Sampling

* Based upon lab result comparisons and modelling software

KPS is headquartered in the Netherlands, with access to all of the gas producing platforms present in the North Sea. KPS Turn-Key automatic gas sampling systems are installed at many of the major gas producing companies in this area for custody transfer or fiscal metering purposes. 

gas-sampling1KPS Turn-Key automatic gas sampling systems are primarily used to determine the BTU's, SGU and HC Dew point of the gas streams. KPS automatic gas sampling systems are also used to get information on the status of the gas producing wells and/or the gas being transferred.

Registration using the KPS automatic gas sampling systems can be important when clients are submitting claims, for the control of gas suppliers, or to prevent unnecessary fiscal payments.

KPS Automatic Gas Sampling Systems are built in accordance with the ISO 8943 / ISO 10715 standards. KPS is capable of providing a truly representative composite sample, giving both the user and the client/supplier confidence.

Brochure on Automatic Gas and LNG sampling

Introduction to Natural Gas Sampling

PID-smallGenerally, pipeline gas compositions will vary over time. Compositional variations will also occur as a result of reservoir changes and the gas treatment equipment used. Traditional methods for auto sampling or online GCs make use of pressure reduction stations in order to collect a sample or perform an online analysis. Due to the required pressure reduction, there is a potential for condensation as described by the gas specific pressure/temperature phase boundary diagram. As soon as condensation occurs, the sample cylinders collect two‐phase flow and the sample can be considered unrepresentative. Moreover, it is not just the bulk of the gas stream that should be considered, but also the individual C6+ components in order to prevent a degrading of the sample being analysed. Furthermore, with offshore platforms and FPSO’s attempting to reduce the maintenance and skill level required, operators are faced with complicated online GCs. Apart from the amount of training and expertise required to operate an online GC, they tend to have a high failure rate and require frequent re‐calibrations on a daily or weekly basis in order to remain accurate within the desired operational levels. The KPS Gas Sampling Systems provide a solution for this which is easy to use and has a low failure rate.

KPS Gas Sampling Systems

Depending upon your needs, KPS provides customised and certified turnkey systems. The low maintenance, user‐friendly KPS automatic sampling systems are designed to prevent retrograde condensation, hence degrading of the sample. As soon as the sample receivers are filled, they ared isconnected and transported to the laboratory. In the laboratory, a detailed analysis can then be conducted under ideal environmental conditions. Using the KPS CPR sample receivers, you no longer need to worry about temperature drops that can occur during transport to the lab or during storage. The KPS CPR prevents possible condensation due to temperature drops by storing the samples at high pressure at all times. The KPS CPR makes use of the floating‐piston cylinder principle. A moving piston separates the sample from a pre-charged gas, equalising the pressure on both sides of the piston. During sampling, the floating piston is then displaced by the grabs taken using the KPS GS‐01 Gas Sampler. KPS automatic sampling systems provide a truly representative composite sample, reassuring both the user and his clients.

GS-01 Gas Sampler

The KPS GS‐01 Gas Sampler provides a heavy‐duty reliable and very accurate means of extracting gas samples from either high or low pressure pipelines. The GS‐01 is an integral part of the KPS Gas Sampling Systems. The size of the sample is fully adjustable from 0 to 0.5ml and has a maximum operating pressure in excess of 2900psi (200bar). The KPS GS‐01 uses pressure balanced self‐lubricating seals to maximise service intervals and all construction materials are selected to eliminate corrosion by contaminants. Since KPS already has an installed base on many offshore platforms, and since most gas produced today is “wet”, the design of the KPS GS‐01 has been further developed to optimize for such applications. As a result, BTU losses are prevented by eliminating concerns about the reliability and accuracy of the entire metering system. The KPS GS‐01 heavy duty automatic sampler provides long‐term and stable performance. The KPS GS‐01 can be completely overhauled in less than 15 minutes. The KPS GS‐01 operates at all pipeline pressures and will provide repeatable sample sizes regardless of pressure fluctuations. It operates as a pressure balanced pump and samples are discharged at pipeline pressure. This minimises evaporation or condensation and guarantees that each grab remains representative.

Sampler Monitor and Controller

The KPS sampler monitor and controller allows for a completely automated solution to assure sampling quality and to prevent mistakes due to wrong manual handling. Apart from the functional control, this monitor allows for traceability from the pipe to the lab. Furthermore, the integrity of the sample is assured by the integrated sampler validation program. The KPS sampler monitor and controller involve a remote I/O functionality with HMI, PLC and web interface. The collected data can be logged, providing an overview of the well(s) development over time. Another consideration worth noticing is the possibility of generating a KPI report, this way onshore teams can schedule their maintenance visit.

Constant Pressure Sample Receiver

The KPS CPR constant pressure sample receiver provides a heavy‐duty reliable and very accurate means of storing gasses, crude oils, condensates and refined hydrocarbons for either high or low pressure pipelines. The KPS CPR’s can be pre‐charged with inert gas or line pressure to maintain the collected sample at process pressure conditions. This is done to minimise upon evaporation or condensation and to make sure that downgrading of the grabs are prevented. For practical reasons (e.g. carrying weight) and storage, the CPR’s tend to be smaller in size than the low pressure KPS Receiver Cans and are available in 500ml and 1000ml standard Sizes. Other sizes are available upon request. Furthermore, it has a robust and rugged design that complies with the highest internationally recognized health and safety requirements. The CPR has a maximum operating pressure in excess of 150bar @ 100 C, are equipped with a pressure gauge and an integral magnet and external level indicator. As an option, this can be combined with an electronic high/low or level sensors and a rugged carrying case. Since KPS already has an installed base on many offshore platforms, the design of the KPS GS‐01 has been further developed to minimise maintenance requirements.

KPS: Your Partner in Sampling

In automatic gas sampling, it's not just about purchasing the right components; it is about integrating them to form a complete system. The proper materials must be selected based on the gas composition and possible contaminants. With its headquarters in the Netherlands, with access to all of the gas-producing platforms in the North Sea, KPS has been able to develop the capability of providing reliable and low maintenance designs to the industry. In addition to the proper sealing technology, valve seats, and special material protective measures that can be taken, KPS has developed a testing and monitoring method that doesn't just make the designs more sustainable, but also allows for the periodic validation of the KPS auto samplers.

More on Custody transfers of Natural Gas
More on Online Gas Composition Analyses
Brochure on Automatic Gas sampling

References Automatic Gas Sampling:

The story of NAM

total shell nam exxonmobil
gaz-de-france talisman

The KPS automated sampling systems installed at AWG and K14 have been running for several years now and after the initial start-up without a need for maintenance.

Head Metering Services of Shell Upstream International

Contact

KPS
Dienstenstraat 25
3161 GN Rhoon
The Netherlands
t +31 (0)10 - 5030077
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