FILE - In this April 21, 2010, aerial file photo, the Deepwater Horizon oil rig burns in the Gulf of Mexico, more than 50 miles southeast of Venice on Louisiana's tip. Environmental activists Karen Savage and Cherri Foytlin wrote an article criticizing a company that published a study finding no connection between chemicals released by the explosion and health problems reported by some cleanup workers. Massachusetts' highest court will hear arguments Oct. 7, 2016, in a bid by Savage and Foytlin to throw out a defamation lawsuit filed by the company, siting a state law that protects citizens exercising their free speech rights. (AP Photo/Gerald Herbert, File)
FILE - In this April 21, 2010, aerial file photo, the Deepwater Horizon oil rig burns in the Gulf of Mexico, more than 50 miles southeast of Venice on Louisiana's tip. Environmental activists Karen Savage and Cherri Foytlin wrote an article criticizing a company that published a study finding no connection between chemicals released by the explosion and health problems reported by some cleanup workers. Massachusetts' highest court will hear arguments Oct. 7, 2016, in a bid by Savage and Foytlin to throw out a defamation lawsuit filed by the company, siting a state law that protects citizens exercising their free speech rights. (AP Photo/Gerald Herbert, File) Credit: Gerald Herbert

BOSTON — When Karen Savage and Cherri Foytlin wrote an article about the Deepwater Horizon explosion and oil spill of 2010, they thought it might get a few moments of attention and then fade away.

More than three years later, Savage and Foytlin are still defending their article after being sued by a scientific consulting company. The battle is headed to the highest court in Massachusetts. Arguments are scheduled for Friday, a week after “Deepwater Horizon,” a film starring Mark Wahlberg, opens in theaters.

Their 2013 article, which appeared in The Huffington Post, questioned the independence of ChemRisk, a firm that published a study that found that the Gulf disaster did not expose cleanup workers to harmful levels of several airborne chemical compounds released by the explosion.

Savage and Foytlin alleged in the article that ChemRisk had strong ties to the oil industry and accused the company of “using questionable ethics to help their clients avoid legal responsibility for their actions.”

The oil spill, one of the largest environmental disasters in history, began on April 10, 2010. Millions of barrels of oil leaked into the Gulf of Mexico for 87 days after the explosion. British Petroleum, which was found primarily responsible for the spill, has paid billions in cleanup costs, settlements and penalties.

The defamation lawsuit filed by ChemRisk stunned Savage, then a middle school math teacher in Boston, and Foytlin, a single mother from Rayne, Louisiana, who became an environmental advocate after the Deepwater Horizon spill.

“I have a 1999 beat-up car, six kids and a mortgage — that’s all I have — so I thought, there’s nothing they want from me except to shut me up,” said Foytlin.

The case is expected to explore the scope of a Massachusetts law aimed at discouraging lawsuits intended to silence people who speak out on issues of public interest. Savage and Foytlin claim ChemRisk’s lawsuit falls into that category of litigation, known as Strategic Lawsuits against Public Participation.

Many states, including Massachusetts, have anti-SLAPP laws designed to quickly dispose of such lawsuits if the people being sued can show they were engaged in their constitutional right to petition the government. The state’s law defines petitioning activity as written or oral statements made in connection with an issue being considered by a government body or aimed at building public support or influencing government policy.

Savage and Foytlin say their article was an attempt by them to encourage action and enlist public participation in governmental proceedings and court cases in the oil spill. They say the lawsuit was designed to intimidate them.

“This was a spill of national significance … we were trying to show that there was still some serious impact from this disaster,” Foytlin said.

“As citizens, we should have the right to speak out, to share the story to make sure people know what’s really going on,” she added.

ChemRisk’s lawyers, however, say the article was a “hit piece” that contained false information.

Savage and Foytlin filed a motion to dismiss the lawsuit, but a judge rejected that.