Michels Completes Over 15,000-foot HDD Crossing
Michels continues to extend the limits of trenchless construction by completing a 15,426-foot horizontal directional drill (HDD) of a 24-inch pipe crossing of Lake Sakakawea on the Missouri River in North Dakota.
The crossing is part of a new pipeline being constructed from Tioga, North Dakota, to near Watford City, North Dakota. The crossing is a critical element in the pipeline’s ability to deliver higher levels of natural gas associated with oil production from the Bakken and Three Forks Formations in Williston Basin and to reduce the amount of natural gas that would otherwise need to be flared.
The HDD crossing of just less than 3 miles is one of the longest of its kind, surpassing by 3,174 feet a 20-inch HDD crossing Michels completed in the Bakken region in 2019. HDD minimized disturbances to the area and provided a delivery outlet for previously untapped energy sources in both instances.
Although the crossings were similar in location, length, and technique, each project included its own unique and awe-inspiring accomplishments.
Prior to pullback, the 15,426-foot pipeline was assembled by Michels Pipeline, Inc., into two sections–one of 426 feet and another of 15,000 feet. When laydown space allows, long sections of pipe can be advantageous because they require fewer pull stoppages to weld pipe strings together. While stopping can generally be accomplished, resuming movement of pipe can be challenging, even with a specific and well-planned drilling fluid and lubrication program.
Like the 2019 project, the recently completed project used the pilot hole intersect method and two custom-made drill rigs, each with more than 1-million pounds of push/pull capacity.
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