Pipe ramming is ideal in adverse soil conditions—such as gravels or cobbles—where directional drilling is not feasible. Pipe ramming uses a pneumatic powered tool to drive a steel pipe horizontally into the ground. The front end of the pipe is left open, allowing soil to enter the pipe. After installation is completed, the soil is removed by doubling up the casing or auguring out.

Summary of the pipe ramming process:
Rammer and first pipe section are lowered into the starting pit and placed on a fabricated launch platform.
The tool is firmly secured to the pipe ensuring that full impact is transmitted to the pipe.
Rammer is connected to a conventional air compressor and the section is driven—similar to driving a stake with a sledge hammer. This system does not require thrust support.

Pipe bursting is a process by which an existing pipe in need of replacement is fractured and displaced into the surrounding ground while simultaneously is installed a new polyethylene pipe (PE or HDPE) of the same size or larger.
A portable static method of bursting is accomplished with a bursting head and hydraulic pulling device. The bursting head fractures the existing pipe and pushes the pieces into the existing bedding surrounding the line. The hydraulic pulling device provides traction for the bursting head, and permits navigating straight pipe sections as well as bends up to 45 degrees. The new pipe can be the same size or larger than the pipe it replaces (a practice known as upsizing). The steel bursting head is of a special design that grips the new pipe and protects the leading edge of the new pipe, while allowing navigation of the 45-degree bends.

 DRILL SUB utilizes moles on a daily basis to lay new or replace existing services.
Impact moling is a technique in which a mole (soil displacement hammer) is launched from an excavation to displace the soil and form a bore. The new conduit is normally drawn in behind the mole or pulled back into the bore using the hammers reverse action. Pneumatically driven moles, in which the soil is displaced by the action of a percussive piston, have been developed in the range 1 inch – 8 inch diameter for a single operation.
Impact Moling is ideal for installing small diameter pipes and ducts over short distances. DRILL SUB own and operate moles to install services such as, Sewer, Water, Gas, Electric, Telecommunications.
Typical Impact Moling set-up

DRILL SUB is a one stop solution for your line and grade installations utilizing various guide boring systems. Whether you need to install a utility line or need equipment or advice to do it on your own we can help. We specialize in trenchless pipeline installation techniques and utilize the latest trenchless equipment with line and grade guaranteed.

Guided System
Assisted by pilot rods equipped with optical passage, steering head, and theodolite with CCD camera and monitor, open-guided boring can be carried out in displaceable ground. The pilot pipe is pushed through the ground towards the target shaft. The direction is monitored by the CCD camera throughout the whole process. The direction of the head is adjusted by rotating the pilot pipes to guide the steering head on the cross hair image on the guidance monitor.