We were contracted to install approximately 1,400 feet of 8-inch diameter Fusible PVC pipe duct banks under the Malden River in Boston. This project was performed on a completed US EPA Brownfield site.

 

The capped hydrocarbon layer was protected with a timber matt foot print.  Forty-eight inch steel casing pipes were pneumatically installed to an elevation below the hazmat layer into non-contaminated soils to isolate and prevent cross contamination of the drilling fluids.

 

The job required the employment of drilling into and out of the casing pipe with the use of wire line steering and intercept technology. Both drills were installed with compound curves.

 

This project also employed one of the first annular pressure probes that recorded in real time the actual pressure that the surrounding ground formation was realizing from the drilling operations.

 

With the soil calculations of the ground's ability to withstand a given pressure, we were able to make drilling procedural changes prior to ground fracturing.

 

Read more about the project in Trenchless Technology Magazine.​

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