We track our field reliability by recording failure modes and year shipped for each returned transducer. Each year we analyze the findings for trends and share the results openly on our webpage. This report describes the general design of a Quartdyne pressure transducer and provides the reliability statistics and common failure modes for each of the major components.
With today's quickly changing technology, part obsolescence often forces unanticipated and costly design changes outside the normal product life cycle. Quartzdyne’s Custom ASICs can be used to fill this gap and gain other advantages such as reduced parts count, higher performance, and higher reliability. Two digital 0.8?m bulk CMOS ASICs have been successfully implemented, providing higher reliability and performance than their replacement parts at 225°C. In this paper we examine some of the design issues encountered during their implementation, including process selection, library characterization at 225°C and above, performance, testing, and qualification. External analog circuitry was integrated to further reduce parts count and increase reliability. In conclusion, we have found bulk CMOS to be an acceptable process for custom ASICs in high temperature environments.
Read more in the Quartzdyne paper presented at HiTEN 2012
Call for collaboration: If you have an idea for a technical paper based on a pressure or temperature sensor application, Quartzdyne would like to partner with you to jointly write a paper. Let us help you demonstrate our joint solutions to today’s toughest problems in the oil and gas industry.
Past experiments cataloged Quartzdyne transducer drift at maximum rated pressure and temperature while comparing results with competing strain based technologies (/pdfs/drift.pdf). Recently, several customers have asked for a description of Quartzdyne transducer drift at intermediate conditions similar to those experienced in the field. In order to meet this request, Quartzdyne engineers are currently testing transducers over a matrix of pressures and temperatures ranges similar to those experienced downhole. Once the data is collected, typical Quartzdyne transducer drift versus temperature and pressure will be published. Email us directly if you would like to get a sneak peek at the results!
The need to look beyond conventional sources of oil and gas is an increasing reality of the industry. This growing need is driving demand for precision quartz transducers capable of pressures and temperatures beyond what is already considered to be high pressure and high temperature. In response to the industry’s need, Quartzdyne has developed a proprietary quartz technology that enables the pressure transducers to perform in extremely high pressures and temperatures environments. Using that technology, Quartzdyne will soon be launching transducers rated for 35,000 psia and 225°C. Quartzdyne is also targeting 40,000 psia and 260°C for the next phase of development. Contact us now so you can be ready when we move to release.
Quartzdyne has moved away from the Fischer connector on both 0.88-inch and 0.75-inch transducers. The Fischer connector has been replaced by our 7-pin connector. The new connector is more robust and also creates a better hermetic seal. A drawing of the new 7-pin connector is available at the following address (/spec/dmb002_connector.pdf).
Quartzdyne has built a series of computer interface products over the years. These units allow a Quartzdyne transducer to be connected to a computer for general data acquisition or logging purposes.
Series-I: The Series-I was the original box used to interface a frequency transducer to a computer. Many of these units are still operational and used in the field even today; however, due to part obsolescence, this unit has not been manufactured by Quartzdyne for many years.
Q-Link: The Q-Link is used to interface a digital transducer to a computer. This unit is a four port device (connects up to 4 transducers at once) and connects to a computer via a serial port connection. Due to the fact that computer serial ports are going away and also because the Q-Link only talks to digital transducers, a decision was made to create a next generation interface box. As discussed in previous newsletters, this means the Q-Link product will no longer be built at Quartzdyne.
QCom: QCom is the next generation of computer interfaces designed to communicate with both frequency and digital transducers. Each QCom box will be single channel (read one transducer) and will interface to a computer via a USB connection. Power for both the transducer and interface box will come from the USB port (no separate power connection or international adapters will be required). More information regarding the QCom interface device can be found at the following link (/pdfs/QCOMManual.pdf ).
We invite you to visit Quartzdyne in booth 3625 during the Offshore Technology Conference and Exhibition in Houston. Please contact us at firstname.lastname@example.org if you would like a complimentary one-day pass. We look forward to seeing you there!