How much does a CPT rig cost?

Cost, $12 to $24 per foot (NCHRP findings), may be prohibitively expensive for detailed site investigations.

What is CPT rig?

CPT Rigs (Cone Penetrometer Test Rigs) are used for pushing CPT cones into the ground to obtain readings such as tip pressure, friction sleeve readings, pore pressure and seismic readings. Our CPT rigs can be track-mounted and anchored into the ground with augers, or truck or trailer-mounted.

How much does a drill rig cost?

They usually cost a minimum of US$200 million and upwards. This depends on the level of drilling & pipe handling equipment you want to have on the drill-floor (and which shipyard is building the rig). I have seen some drillers forgoing even a casing stabbin… Small workover rig = a few tens of millions of dollars.

What is a CPT log?

CPT test log showing Soil Classification, Tip (qc), Sleeve (fs), Pore Pressure (u2), and Friction Ratio (Rf). Log clearly shows the change from clay to sand in both tip pressure and pore pressure.

What is QC in CPT?

Cone Penetration Test (CPT) Quality control (QC)

What is the difference between SPT and CPT?

In construction projects, it is common to use SPT for the preliminary soil investigation, whereas CPT is used for detailed soil investigation and construction quality control.

What is the difference between CPT and SPT?

How do I take the CPT test?

The test is carried out by first pushing the cone into the ground at a standard velocity of 1 to 2 cm/s while keeping the sleeve stationary. For any depth, the resistance of the cone, called cone penetration resistance q_c , is recorded using the force probes provided for this purpose in the cone.

What is friction ratio?

The “friction ratio” is the ratio between sleeve friction and tip resistance, measured as a percentage. We measure the time it takes for the seismic energy to travel from the land surface, through the ground, to the seismometer mounted in the cone.

What is a CPT rig?

Our CPT rigs are capable of accessing urban centers, remote sites, mine tailings, and active construction areas. Built between 18-35 tons / 180-350kN, these are the hardest pushing rigs in the industry. Advanced hydraulic systems penetration rates are maintained, while safety and efficiency are maximized.

Why choose multiple CPT drill rig anchoring options?

Multiple CPT drill rig anchoring options provide the flexibility desired to reach depth depending on the site conditions.

Where can I find used drilling rigs for sale?

Welcome to the “Used Drill Rigs” section of the Geoprobe ® website. This is a free service we offer for listing used drilling rigs for sale and other drilling equipment. If you’re looking for used drilling rigs for sale, check the website often because our previously-owned Geoprobe ® machines move fast!