NCS Multistage has received four patents from authorities in the U.S., Canada, and Ukraine covering proprietary design features utilized in the company's downhole completion tools and proprietary methods used to perform multistage completions in oil and gas wells, the company said in a news release.

The patents include:

  • U.S. Patent 9,234,412, method for shifting a sliding sleeve;
  • Canadian Patent 2,766,026, method for delivering treatment fluid to a formation intersected by a wellbore using an abrasive-fluid perforation device;
  • U.S. Patent 9,303,486, equalization valve in a downhole tool assembly used for continuous equalization of hydraulic pressure across a sealing element during fracturing and
  • Ukrainian Patent 108664, completion tool for deployment within an oil, gas, or coalbed methane wellbore, according to the release.

The patents are connected to NCS Multistage Unlimited completion system, which combines the company’s casing-installed sliding sleeves and its downhole completion tools, NCS Multistage CEO said Marty Stromquist said in the release. “The total number of patents for this core technology has grown to 14.”