EFS was founded in 1994 with a Geoprobe® Direct Push Sampling System in order to support subsurface environmental investigation, remediation, and geotechnical evaluation by our clientele. Since the early 90s, EFS has expanded our inventory of equipment in order to provide soil, water, air, and waste sampling services throughout the United States. Our newest piece of equipment, appropriately nicknamed “Big Red”, is a CME 75 Drilling Rig mounted on a Morooka MST-1500 Carrier. This rig has multiple attachments for a type of rock coring called wireline core drilling. Wireline core drilling is a special type of core drilling. Unlike some types of drilling, the purpose of core drilling isn’t to make a hole, but instead to retrieve a core sample, a long solid cylinder of rock that geologists can analyze to determine the composition of rock under the ground.
While performing core drilling, the rig is capable of reaching depths of more than 1,000 feet below the ground surface. The 72 inch stroke, hydraulic vertical drive system has no chains or cables which can stretch and an emergency spindle brake can stop rotation in less than a revolution, allowing workers to operate the rig much more safely. The rig has a small, high-speed winchline that is capable of retrieving the inner barrel very quickly. It also has a break-out table and break-out wrench that is made to hold Nq rods and even unscrews them!
EFS’s newest addition allows us to reach further, digging deeper under the ground’s surface, and to break through heavier, more condensed ground material to provide high-quality core sampling for our clientele.