The engineers at a municipal wastewater treatment utility were expanding their biogas digester system and were seeking an improvement over their existing, maintenance-intensive flow metering technology. They needed to measure the amount of gas contained within a gas bag as well as the flow rate of the gases traveling from the gas bag system into a co-generation power system. By Steven Craig, Sr. Member Technical Staff, Fluid Components International
The core of Coriolis mass flowmeters are oscillating tubes. As soon as mass is flowing through them, a Coriolis force is affecting the oscillation, creating a phase shift.
Many thermal mass flow meters are of the insertion type. As a starting point, proper insertion depth and straight run per the manufacturer’s recommendations should be adhered to.
This paper describes a newly developed microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor instead of the traditional two elements and automatically manages changes in gas selection, gas temperature, gas pressure, and outside temperature. By John G. Olin, Ph.D., Founder/Chairman, Sierra Instruments
New tests recently performed by DM Petroleum Operations Company with the FPI Mag® Flow Meter from McCrometer continue to confirm the flow meter’s accurate performance and reliability on two rugged Texas brine disposal lines supporting the U.S. Strategic Petroleum Reserve (SPR).
A fast-growing city in the arid desert regions of the western U.S. recently addressed the need to expand its municipal service for new residents and subdivisions.
Confusion often arises over the difference between mass and volume flow measurement and when a particular measurement should be applied.
Flow measurement & control
The oil and gas industry is one of those areas that rely on flow measurement and control products to ensure efficiency, safety and accuracy in production. Some of the flow measurement instruments and products that are used in the petrochemical industry include multiphase meters and water-cut meters. These instruments offer solution to all topside and downhole installation needs. Flow measurement and control instruments need to be accurate to ensure that production percentages are not exaggerated or understated.
The flow meters used in the oil and gas industries can either be portable or fixed installation types. The portable flow meters are normally used in areas that range from troubleshooting to testing and servicing. The fixed installation flow meters are mainly used in functions that are permanent or less frequent to changes. There are certain attributes that ought to be considered in a flow meter before it is purchased. Ease of use and accuracy is a trait that all measurement instruments need to possess. All portable flow meters need to be flexible while the fixed installation meters need to durable and versatile.
Most manufacturers have metering specialists who will help with all the stages from need evaluation to design and installation. This helps since the final product will be that which is specific to the needs of an individual oil or gas site. There are software designed to help with optimization and facilitate instantaneous monitoring. All the installations will be integrated to ensure a fit-for-function solution.
Other than the flow instrumentation, control instruments are the other fundamental component of oil and gas exploration. Control valves are one important part of the control system that ensures that production is maximized with efficiency and the process is seamless. These valves are useful in pressure relief and reduction as well as back pressure regulation. Control systems are installed in compressors and pumps to regulate pressure and flow rates respectively.