The Belchertown, MA home was tucked into the forest, just off the road. While a wheeled rig may have been able to access the front yard, drilling there would require trenching across the driveway because the homeowner’s heating system was located on the left side of the house,  on the top of the above picture.

With our tracked rig and separate compressor, we were able to locate the borehole on the side of the house right next to where the geothermal heat pump would be located, keeping the trench short and the equipment out of the way of the homeowner’s driveway.

In addition to the rig and compressor, Dandelion can bring a custom dumpster to jobs that will benefit from it to collect spoils and keep the site clean. A custom umbilical is run from the rig to the dumpster, funneling the spoils directly into it for containment. Note how clean the homeowner’s side yard is, even in the middle of the drilling process. This can be critical for suburban homes in densely populated neighborhoods.

Our rigs are small and lightweight. In addition to allowing for access to tight spaces, this allows us to work with small crews and avoid the need for auxiliary equipment that might otherwise be needed to lift heavy drill rods, for example. 

In this photo, you can see one of our drilling team members is able to easily move a rod into position himself, without the aid of external equipment.

This photo, taken right after drilling was completed, shows how the site was kept clean.

Dandelion typically drills 4.5” boreholes for our residential projects and installs 1.5” u-bend pipes. This photo shows the u-bend pipes coming out of the borehole before grouting has taken place.

A specially designed truck delivers the drilling rig and dumpster and collects them at the end of the job in order to drive them to the next location.

All in all, Dandelion’s single family residential drilling suite of equipment is optimized for residential job sites, homeowner friendliness (keeping the site clean), small drill crew sizes and straightforward transportation logistics. All of these elements allow us to offer competitive pricing for drilling services that homeowners love.

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Dandelion will be providing geothermal heating and cooling to this builder for 51 of the homes in an upcoming development, including 17 stand-alone single family homes and 35 townhomes. The project is scheduled to break ground in 2025, with homes completed through 2026.

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Dandelion designed and installed geothermal ground loops and heat pumps in 11 new townhomes in the Landing at Esopus Icehouse. This project was drilled in November 2023 and will be completed at the end of 2024. Installing geothermal allowed the builder to avoid equipment pads, line set runs and brazing and it was significantly less expensive than installing air source heat pumps would have been, both for the builder and for the customer.

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This project required Dandelion to design a robust water and spoils containment system when the job was already underway. The test bore for the project, which was completed by another company, had indicated the boreholes would produce about 35 gallons of water per minute. However, when we began drilling, we quickly found the boreholes were producing in excess of 200 gallons of water per minute, and given the location of the library, it was paramount this water was adequately contained.

Our engineering team was able to quickly design a water and spoils containment system to allow the job to proceed without delay by bringing two holding tanks to site to contain water and spoils. We took the water draining from the holding tank and reinjected it into boreholes that had already been drilled. Once one holding tank filled with spoils, we switched to the other tank as the first had its contents disposed of, switching between them. 

With the water situation thus adequately managed, the Kingston library project was completed on time and on budget.

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Dandelion also used the test bores to conduct Formation Thermal Conductivity (FTC) testing. FTC testing measures the thermal response of the geology at the jobsite so when the larger borefield is designed the engineers designing it know how many bores they will need to exchange a certain amount of heat. This allows them to size the borefield correctly. FTC tests are done by cycling water that is heated at a constant rate through a ground loop for 48 hours and measuring the thermal response at a regular interval.

The post Test bores and Formation Thermal Conductivity (FTC) Testing — Riverhead, NY appeared first on Dandelion Energy | Residential Geothermal Heating & Cooling.

Dandelion has designed and is implementing a full turnkey geothermal solution for this community. 

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