Waste Management Inc. has acquired two energy services companies for an undisclosed amount.

The Houston-based Waste Management said in a news release that it purchased Summit Energy Services and Liquid Logistics, both based in Williston, N.D. The acquisitions will strengthen the company’s service to oil and gas industry customers working in the Bakken Shale formation.
The same private owner held both companies. Waste Management has retained all 140 employees from the two firms.

The purchases will add skills and services including roustabout and oil well-site maintenance, road and well-site pad construction, storm water and erosion control management, aggregate crushing and sales, and well monitoring pumping.

The company said it will eventually offer services such as rig maintenance and tank cleaning, drill cuttings solidification and disposal, based on customers’ needs.

 “While we work with oil and gas customers around the country, these acquisitions give us access to an element we haven’t previously served,” said Harry Lamberton, vice president of energy and environmental services for Waste Management. “They also add expertise that we will use in the other North American regions where we provide environmental services to oil and gas customers.”

Waste Management Energy Services, a subsidiary of Waste Management, provides environmental management services to the oil and gas industry.

The Bakken Shale formation, located in Montana and North Dakota, is one of the largest oil fields in the United States.