Marcellus / Utica Shale Systems EngineeringWe offer experience and manpower! Working in these new shale plays has taught us and our customers that there is no substitute for experience and manpower. Many of our competitors may offer great system designs but do not have a path to market other than subcontractors and untrained workers. Some have a local workforce, but are left without engineering capability and high tech support. Our team of Crawford Technical Services, ALEDco, and Leonard Crawford Electric has local employees and offer manpower services ranging for excavation, electrical contracting, pipeline installation, mechanical fabrication, to engineering and IT services.
Mobile Extraction SystemsThe diagram below highlights a basic system proposal that we have offered and constructed for several customers with needs for water extraction and truck filling applications. Some of the unique solutions that we have developed for our customers are:
RTU SolutionsOur HydroWatch RTU (Remote Telemetry Unit) has been developed with many options and capabilities. A basic HydroWatch solution comes equipped with a NEMA 4X polycarbonate enclosure with a clear window and full color operator interface mounted within an inner swing panel. The standard HydroWatch RTU is powered with 120VAC, however a solar powered system is also offered. Standard I/O includes 8 digital inputs, 6 relay outputs with an upgrade capability for (2) cards of additional I/O. Every HydroWatch RTU has Ethernet as its standard communication protocol, but HydroWatch drivers have been developed to communicate with Modbus RTU serial networks such as SCADALynx and CygNet. The image to the right is a standard RTU that has been upfitted with a fill control light and customer required RAVEN cell modem.
Typical Applications for this RTU include:
Solar Powered EquipmentThe Northern PA and lower New York regions have a unique climate and limited number of sunny days per year. Coupled with freezing temperatures most of the winter, solar powered solutions must be developed for a rugged and limited sunny day environment. Catalog solar solutions simply won't work and typically do not provide enough power for true remote monitoring applications since the unique geography in this region is not understood by catalog based sales companies. Our solar solutions have been used for a number of applications including: 1. Power for LED lighting in portable filter trailers, 2. RTUs that both monitor and control generators for pump control, and 3. Power cell modems that monitor creek gauging systems. We have developed many customer solutions and will work with your application to ensure that our solution meets your application requirements.
The images to the right are of a custom solution that we developed for a gas field monitoring application. This application called for (2) 130 watt solar cells with (198) amphour batteries. Notice that this dual compartment enclosure has been powder coated stainless silver with venting for the enclosed batteries. This system offers a local lower power switch when the system is not in use along with an operator interface for system controls once the system is powered with generator AC power.
***Please note that although this system has been developed as a custom solution for the application, all system components are off the shelf items. In the event of a component failure, our systems utilize the same components that are available with 24 hours.
Pump Control SystemsApproximately 50% of our business is the development of pump control systems. Working with our partner ALEDco, a National Oilfield Varco (NOV) and the single largest Gorman Rupp distributor in the United States, we have developed approximately 50 pump control systems for the Marcellus and Utica Shale Plays. Our pump control systems range from 5HP extraction pumps to dual 500HP multistage high pressure pumps along with a number of multistage extraction, charge, and high pressure pumps to meet the exact requirements of our customers geography and pumping requirements. In other cases we have worked with smaller sites to develop single phase pump controls to operate (3) phase pump systems. Listed below are some of the key services we offer for Pump Control Systems:
Truck Filling SystemsTruck filling systems can be developed with many options that include completely automated, manual valves, and local operator interfaces for datalogging fill information. All truck fill systems can be broken into two categories:
Truck GPS TrackingHydroWatch has complete GPS truck tracking capability. Water is associated with a truck along a delivery route to ensure that water arrives at the correct location, drivers obey posted speed limits, routes are efficient, along with many other features. With the complete HydroWatch interface, proactive decisions can then be made with data that has never been available before. Some of the advanced features available on the Truck Tracking Dashboard include:
Security System IntegrationHydroWatch has been developed as an open architecture software program which allows us to integrate many additional features into the software that are not typical of water management or specific to water sites. Early in the implementation of the first few HydroWatch systems, we learned that site security was just as important as tracking trucks and water. To address customer concerns, we created a security system interface that allows for the integration of Ethernet enables security systems that utilize any of the following:
Electrical Power SystemsThe roots of Leonard Crawford Electric are electrical contracting and being that we are a partner company, there is no doubt that we provide electrical contracting and power distribution services. With a wide range of customers in both typical industrial manufacturing and the gas & oil industry, our teams of electricians have both the tools and know how to get jobs done. Services can ranges from medium voltage switchgear and MCCs to low voltage service entrance construction services up to 6,000 Amps at 480VAC. In many cases we have developed power systems with stand-by generator power until the utility connection can be made. The image to the right shows a 600KVA generator that powers a pump system with 800Amps at 480VAC. Included with this generator power connection were the containments for the generator/fuel tank, refueling, and maintenance services.
New Service Construction
In 2012 we built over (20) service entrances for water extraction, impoundment, and treatment sites that range from 200 to 2,000 amps. To construct these services, Crawford Technical Services has complete design capability where we develop and complete the following:
Instrumentation & Surge Voltage ProtectionUnderstanding analog signals and knowing how to protect them is an absolute prerequisite for working in gas fields. Our engineers and field teams understand how to troubleshoot and install transmitters of all types. Be it 4-20mA or 0-10 volt signals, we have the equipment and understanding to support your application. A typical HydroWatch water fill station will have a number of analog signals:
When selecting surge voltage protection for these types of devices, there are (3) major questions to ask.
Q1. What type of surge voltage is the equipment likely to experience?
A1. Depending on the type of event the equipment is likely to experience, the proper device selection is critically important to the process. There are no, "One size fits all," for surge voltage protection. Lighting and transients are very different from one another. For additional details, visit the Power Quality section of this webpage.
Q2. Is a high integrity ground available?
A2. Without a good ground connection, surge voltage protection equipment is useless. When installing a surge voltage protection device, be sure to install a high integrity ground (See Article 500 of the NEC)
Q3. What technology would be used to protect the equipment?
A3. This may seem like a repeat of question 1, but MOV based products are used if the device is being installed on a power line, but MOV based products are never a good idea for instrumentation. MOVs have leakage currents and will always affect signal accuracy. In the protection of analog signals and communications, diode or gas tube based products are the best solution.
The image above is of a pressure transmitter on a gas pipeline that has a local 4-20mA surge voltage protection device that has been integrated into the explosion proof conduit nipple. This device is diode and gas tube based such that it will protect the pressure transmitter, but will not affect the signal integrity.
Flow Meter/Tank Level/Reservoir MonitoringIf HydroWatch is the brain of an extraction system, flow meters, tanks level sensors, and impoundment gages are the eyes and ears of the system. HydroWatch control systems have many types of sensors and devices to continuously monitor the system and aid operators and decision makers of the operating process. Fully automatic pipeline pumping stations have upwards of 50 sensors that allow PID algorithms to operate the system in the most efficient rates possible without exceeding permitted rates.
With so many sensors on extraction systems, diagnostics are critical in ensuring that sites stay operational. HydroWatch has hundreds of integrated alarms and diagnostics that anticipate input values. If an input signal jumps high or falls too quickly, HydroWatch can sense a failure in a sensor and alarm operators to corrective action. The ability to quickly troubleshoot system faults is a major differentiator between HydroWatch and other systems.
USGS Creek Gage Documentation/Monitoring ServicesThe United States Geological Survey maintains thousands of water gages across the United States and in many cases these gages are the determining factor of when water extraction can occur. With the use of HydroWatch, hundreds of creek gages are monitored and this information is relayed to automatic extraction systems. Once a site goes into pass by mode, water levels must rise above threshold values typically for 48 hours before pumping can resume. HydroWatch continuously monitors these gages and documents values to servers on an hourly basis. At the end of the quarter, HydroWatch combines extraction amounts with the USGS creek gage data to show documented proof that water was only extracted at times when permitted.
Frost Control/InsulationWinters in Northern PA and Central New York can be extremely cold and bring a pumping system to its knees. Frozen water lines can rupture and pumps dead heading will destroy motors in minutes. It is a best practice to install as much equipment below the frost line to protect against such events, but there still are requirements for valves, flow meters, and other equipment to be accessible to operators. With the proper installation of heat tape and other heating equipment along with insulation, systems can operate year round without damage due to freezing temperatures.
Often, extreme cold only occurs for a few short weeks with days here and there of low temperatures. In most cases, electrical power is left on that leads to a breakdown in the heating equipment and electricity costs being incurred, when no additional heat is needed. To save electrical energy and improve a sites overall efficiency, we have developed an algorithm that monitors both air and water temperature. With a properly install heat and insulation system, heaters can be used only when required and shut-off in times when the temperature is not below freezing.
The image above is of a fill stanchion that has Armaflex insulation with an aluminum shell to protect it from UV and physical damage.
Control Panel ConstructionCrawford Technical Services has a full time panel shop at our headquarters in Hershey, PA. We currently build control panels for both our own projects in gas shale plays and also several other machine manufacturers in Pennsylvania and Maryland. Our customers' industries range from pharmaceutical to waste water and many other unique requirements.
Our panel shop offers:
Project Areas/Industries Served:
We are involved in a broad spectrum of industrial process control engineering, manufacturing, and systems integration. Whether we assemble to your specifications or supply the design, our combined industrial experience in industrial automation is built into your control panel.
Crawford Technical Services upholds the tradition of craftsmanship goes into every wiring connection. Aesthetics are more than the visible manifestation of care we build into your panel. Down the road, during maintenance or upgrades, the logic of careful and extremely neat assembly will pay big dividends. Our attention to detail means you will get maximum performance and return on investment.