Pipeline integrity testing often requires hydro excavation to expose a segment of pipe for inspection. The resulting hydro excavation muds are often a regulated, challenging to dispose of and in some cases, contaminated. In 2015, MetaFLO licensee KBL was contracted by a major Canadian pipeline operator in Alberta to provide the solidification and disposal of 200 m3 of this waste.
The Georgian Bay Pipeline Project was necessary to meet growing need for natural gas in that region. The new pipeline was 20 kilometers and 12” diameter. The route for the pipe included 30 road, rail and river crossings which would require horizontal directional drilling (HDD) to complete. Spent HDD fluids and cuttings are a regulated waste in Ontario and very costly to transport and dispose of. An estimated 250,000 gallons (940,000 litres) of spent drill mud would be in need of disposal.
Drilling waste in BC in need of solidification at remote mountain top site. Drilling mud produced near slopes estimated at greater than 28⁰ restricting mobility and truck access. Project deadline was constrained by heavy rain prior to mobilization and wildlife migration and fisheries preservation. Thin layers of gravel-like natural soil provided inadequate soil properties for mix-bury-cover site processing.
MetaFLO's licensee was contracted to provide service on a large Ontario gas distribution upgrade project. Nearly 50 bores were drilled using horizontal directional drilling technology to complete this upgrade. MetaFLO's licensee was required to process the resulting liquid waste which totaled more than 500,000 gallons of directional drill mud.