Edmonton Technical Lunch - Thursday, January 24, 2019


NASTT Colleagues and Friends

Please join us for the third technical lunch of the 2018-2019 season on Thursday, January 24th, 2019.

This month’s presentation will be discussing HDD Drilling Waste Reduction.

Drilling fluid performance is critical to ensure efficient drilling or reaming. An effective drilling fluid will reduce drag and torque, provide hole stability, and effectively transport drill solids to surface. One key to maintaining effective fluid, is controlling the density of the fluid thereby reducing the static and dynamic pressure of the circulating fluid and reducing the potential for hydraulic fracture (frac-out). The most effective means of maintaining drill fluid density is a combination of an Engineered Drilling Fluid Program (EDFP) and an efficient solids control system incorporating centrifuges that continually process the active fluid. Centrifuges that are fully variable speed-controlled, with high processing capacity to continuously process bentonite muds aid in ensuring consistency in the drilling fluid which is essential in avoiding frac-out scenarios. Additionally, a solids control system that is designed to effectively manage the drill solids reduces the amount of dilution required to maintain density and further increases the efficiency of the EDFP.

During most Horizontal Directional Drill (HDD) crossings, shale shakers are utilized as the primary means of solids control. This system results in a very wet drilling waste being generated with a high volume of fluid losses at surface. The total volume of drilling waste is usually transported off-site by vacuum trucks and must be disposed of at a Class II wet waste disposal facility or by other means such as land spray or mix bury cover. Generally, the wet slurry is also so thick, that hydrovac trucks are required to cut and dilute the slurry further increasing the total disposal volume just to transport the material. Not only is this practice expensive but increases traffic risk and environmental impact.

To perform cuttings drying, the shale shaker overflow, plus drilling fluid that floods over the shakers is collected in a recirculation trough and reprocessed through high g-force centrifuges. This results in a dry waste product that passes the Paint Filter Test and the recovered drilling fluid is then reused in the drilling process. In addition, by utilizing polymer addition, you can successfully reduce drilling mud and waste in to clean water, this water can be reused in the HDD process or disposed of in a more environmentally friendly manner.

BOS has successfully reduced disposal volumes and associated costs for our customers on projects including river crossings, pipeline crossings, micro tunneling, horizontal directional drilling and trenches crossings. As a leader in environmental services and waste management solutions, BOS Solutions is focused on maintaining a safe, clean and efficient work environment for our customers while helping you achieve your desired solids control and waste management results. This presentation will review the processes of HDD Drilling Waste Reduction methodologies.

This month’s presenter is Andrew Pow. Mr. Pow is the North American Director of Environmental Solutions for BOS Solutions. He has over 15 years of experience in Drilling Fluid, Solids Control and Waste Mitigation Management.

Registration Closed

Place: University of Alberta Faculty Club, Papaschase Room, 11435 Saskatchewan Drive

11:30 am Registration
12:00 pm Lunch
12:30 pm Guest Speaker
1:30 pm Adjournment

Greg Tippett, P.Eng.
NASTT-NW Chapter