STW Energy LLC, a subsidiary of STW Resources Holding Corp. (OTC: STWS), expanded its South Texas operations—moving into the Eagle Ford—and also increased Permian Basin services, STW Resources said Feb. 20.

The company has “high demand” for its services in the Eagle Ford, STW Resources said.

Additional crews and equipment were added to STW Energy’s Permian Basin area, and in the Eagle Ford, 20 field operations workers were added, the company said.

STW Energy plans to add seven more crews by the fourth quarter 2014, and currently has three crews operating, STW Resources said. The crews can generate about $1 million each annually, the company added.

"Our successful launch of STW Energy reinforces our business plan and the demand for our services," said STW Resources’ chief operating officer Lee Maddox, who continued, "STW's other subsidiaries are experiencing the same results."

STW Energy, based in Midland, Texas, removes oil and diesel residue from drilling rigs.