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Communications/Telemetry


Digital telemetry Mantracourt’s T24 digital telemetry system has been chosen by Technip Umbilical Systems (DUCO), a company that manufactures a range of bespoke umbilical systems for offshore applications (Fig. 1). DUCO umbilicals form the critical link


between a subsea production arrangement and a remote facility providing control, power, and communications and chemical services. Applications now include production control, chemical injection, subsea pumping and processing, gas lift and underground gas storage among others. Using the T24 telemetry measurement technology, DUCO performs steel tube fatigue tests and remotely monitors strain throughout. Tis testing is essential as umbilical structures can undergo dynamic stresses throughout service life, which can impact on lifespan and performance. Accurate fatigue data is therefore essential. “Mantracourt’s T24 wireless strain measurement system is ideal for our application,” said Robert Nesbitt, principal engineer at DUCO. “Te tubes rotate during component testing, so


‘wired’ systems have proven impractical. Moving to the robust, wireless telemetry approach of the T24 is enabling us to reliably collect critical data.”


Battery life Tom Crawford, test technician at DUCO, added, “With the sleep and wake feature, the requirement for personnel intervention can be reduced and battery life increased. “Features such as the very small size of the device


and Mantracourt’s excellent technical support have also contributed to the success of this project.” Mantracourt is a specialist in the design and manufacture of electronics for measurement


technologies including strain gauge, temperature, pressure, voltage, current, potentiometer, rate, flow, linear variable differential transformer (LVDT) and displacement in either analogue, digital or wireless form.


Strain gauge acquistion device Te DUCO system operates with a Mantracourt T24-ACMm, a mini IP54 enclosure which houses the strain gauge acquisition device, converting the analogue signal (mV) to a digital format which is then transmitted via 2.4 Ghz frequency to a PC. Te internal antenna provides range of up to


100 metres. Te T24-ACMm also has options for a voltage or current input. A small battery pack with 2 x AAA cells is used


to provide 3V DC power and has been fixed to the rotating tubes. Duco has used Mantracourt’s toolkit software to receive and log data to a .csv file. “Tis is an ideal example of how Mantracourt


works with our customers to overcome measurement and instrumentation challenges,” said Kelly Voysey, marketing manager at Mantracourt. “With all of the design and manufacturing of our products taking place at our UK factory, we are able not only to maintain absolute quality, but also to provide bespoke systems and the highest level of technical support.”


Communications solution For its part, Harris CapRock Communications has announced the further development of its FieldAccess communications solution with the opening of two service centres in Odessa and San Antonio, Texas, to enhance rapid, local service and support to clients’ land drilling operations. FieldAccess, Harris CapRock’s communication


Nova Metrix buys Sensornet monitoring business N


ova Metrix has bought the industrial monitoring business


of Sensornet, the London-based fibre optic monitoring subsidiary of Tendeka - the provider of completions and reservoir monitoring products and services to the upstream oil and gas industry. Under the deal Tendeka will retain exclusive access to Sensornet products within the upstream market segment. Sensornet, which is now fully industrial and downstream following the integration of upstream fibre optic


34 www.engineerlive.com


monitoring into Tendeka, incorporates systems for power, environmental, industrial and fire monitoring. Tendeka’s reservoir monitoring


portfolio incorporates digital and wireless monitoring solutions for water injection, oil production, gas lift optimisation in both permanent completions and intervention campaigns. Ceo Gary Smart said the sale of Sensornet’s industrial business to Nova Metrix was a logical step as it permits Tendeka to focus on the significant growth of its core


upstream business. Nova Metrix, which specialises in asset monitoring products and services, is ideally placed to take Sensornet’s industrial business to the next phase of growth. Nova Metrix ceo Jim Barbookles


said: “With this addition to the Nova Metrix portfolio, we’re able to further enhance our range of asset monitoring products and services by strengthening and consolidating common technologies with existing portfolio companies such as Roctest and Durham Geo Enterprises.” ●


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