Deploying the telescoping mast on the 3100GT Geotechnical Drill Rig
Multiple rotary head options are available on the 3100GT Geotechnical Drill Rig
No CDL Required (Class A/B) on the 3100GT Geotechnical Drill Rig
The breakout clamp the rods and the breakout wrench is used to separate the joints on the 3100GT Geotechnical Drill Rig
The head can be shifted 26 in. for rotary, geotechnical, or winch access on the 3100GT Geotechnical Drill Rig
Pump options include the Moyno® 3L6 or Moyno® 3L8 on the 3100GT Geotechnical Drill Rig
The drill mast can be positioned with fold, extend, mast dump, swing, and oscillation on the 3100GT Geotechnical Drill Rig
7,000 lb. primary winch and 1,800 lb. secondary winch with Quick Change Hook on the 3100GT Geotechnical Drill Rig
The breakout clamp the rods and the breakout wrench is used to separate the joints on the 3100GT Geotechnical Drill Rig
Geotechnical sampling – Powerful, Flexible, Fast, Easy on Drillers
The Geoprobe® 3100GT Geotechnical Drill Rig is designed to quickly perform SPT borings (augers & mud rotary), collect shelby tube samples, take rock cores, and push CPT cone…all on a 19,500 GVWR truck that does not require a CDL (Class A/B) to operate.
Geotechnical sampling – Powerful, Flexible, Fast, Easy on Drillers
The Geoprobe® 3100GT Geotechnical Drill Rig is designed to quickly perform SPT borings (augers & mud rotary), collect shelby tube samples, take rock cores, and push CPT cone…all on a 19,500 GVWR truck that does not require a CDL (Class A/B) to operate.
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Features & Options
Click on a section below to learn more about the features and options of the 3100GT.
Over the last 15 years Geoprobe® has increasingly been supporting customers focused on successful geotechnical investigations. On many geotech sites, the need for speed and efficiency is of the utmost importance. The specific methods of geotechnical sampling varies greatly and are usually dependent on a combination of subsurface site conditions and what is considered an acceptable practice in the geographic region. The Geoprobe® engineering team set out to design a rig specifically for geotechnical sampling that could quickly perform SPT borings (augers & mud rotary), collect shelby tube samples, take rock cores, and push CPT cone…all on a 19,500 GVWR truck that does not require a CDL to operate. From this vision, the all new Geoprobe® 3100GT was born.
Video: Rotary Head Options Overview
The 3100GT Geotechnical Drill Rig has multiple rotary head options mounted on a side shifting carriage.
The 3100GT has multiple rotary head options mounted on a side shifting carriage:
GA4000 (4000 ft-lb, 150 rpm)
GA4100 (4000 ft-lb, 750 rpm)
CB5 (6000 ft-lb, 600 rpm)
All heads provide full torque in forward and reverse
26-in. of head side-shift
Video: Hands-Free Function
The 3100GT features a hands-free setup for rotary work in additional to manual operation. It is used for applications such as rock coring or mud rotary.
Video: Automatic Drop Hammer Overview
The auto drop hammer on the 3100GT Geotechnical Drill Rig
The automatic drop hammer can quickly and easily be deployed without needing to be man-handled.
Video: Head Side Shift Function
The head can be side-shifted a total of 26-in. This allows for side-shifting the head for rotary work, geotechnical work, and out of the way completely when using the winches.
Video: Drill Mast Overview
The drill mast has a class leading push and pull force (36,000/48,000 lbs) on the 3100GT Geotechnical Drill Rig
The drill mast includes 105-in. of head feed travel. This gives you plenty of room to catch the odd interval, or to easily add a swivel under the head. Additionally, it has a class leading push and pull force (36,000/48,000 lbs).
Video: Positioning Options
The drill mast on the 3100GT Geotechnical Drill Rig can easily be shifted exactly where the hole dictates.
With extend, swing, mast dump, oscillation, and fold, the operator can quickly deploy and position the drill mast exactly where the hole dictates. Drill mast outriggers let you quickly setup above a mud pan as well.
Video: Winch Mast Overview
The 3100GT Geotechnical Drill Rig telescoping mast extends for tripping out longer tooling.
The telescoping winch mast reduces overall height but still allows the tripping out of 20-ft. lengths of rod when combined with the 3-ft. extension. The telescoping option allows you to set the mast height based on site and field conditions.
Video: Control Panel Functions
The control panel on the 3100GT Geotechnical Drill Rig
The manual controls provide the tactile feel that some drillers prefer and the electric control adds safe hands-free operation.
The deck of the 3100GT Geotechnical Drill Rig
High capacity hydraulics powered from the truck engine saves weight and deck space. The high flow primary pump runs at 47 gpm and 4000 psi. A separate hydraulic pump is just for the mud pump.
Video: Using the Breakout
The 7-in. clamp with breakout wrench can swing directly over the hole. It is used to clamp the rods and the breakout wrench is used to separate the joints. The clamping pressure can be adjusted as well (reducing the pressure slows the clamp down and increasing the pressure speeds the clamp up).
Video: Mud Pump Overview
Pump options for the 3100GT include the Moyno® 3L6 or Moyno® 3L8 Pumps. The pump is controlled at the control panel with an on/off switch and the flow can be adjusted with a flow dial.
Video: Hand Tool Storage
The storage holder connected to the breakout clamp is built for holding the anvil, wrench, and split spoon. The control panel has built in trays and hooks for small tool storage.
Over the last 15 years Geoprobe® has increasingly been supporting customers focused on successful geotechnical investigations. On many geotech sites, the need for speed and efficiency is of the utmost importance. The specific methods of geotechnical sampling varies greatly and are usually dependent on a combination of subsurface site conditions and what is considered an acceptable practice in the geographic region. The Geoprobe® engineering team set out to design a rig specifically for geotechnical sampling that could quickly perform SPT borings (augers & mud rotary), collect shelby tube samples, take rock cores, and push CPT cone…all on a 19,500 GVWR truck that does not require a CDL to operate. From this vision, the all new Geoprobe® 3100GT was born.
Rotary Head Options
The 3100GT Geotechnical Drill Rig has multiple rotary head options mounted on a side shifting carriage.
Video: Rotary Head Options Overview
The 3100GT has multiple rotary head options mounted on a side shifting carriage:
GA4000 (4000 ft-lb, 150 rpm)
GA4100 (4000 ft-lb, 750 rpm)
CB5 (6000 ft-lb, 600 rpm)
All heads provide full torque in forward and reverse
26-in. of head side-shift
Hands-Free Rotary Controls
Video: Hands-Free Function
The 3100GT features a hands-free setup for rotary work in additional to manual operation. It is used for applications such as rock coring or mud rotary.
Automatic Drop Hammer (Hands Free)
The auto drop hammer on the 3100GT Geotechnical Drill Rig
Video: Automatic Drop Hammer Overview
The automatic drop hammer can quickly and easily be deployed without needing to be man-handled.
Head Side Shift
Video: Head Side Shift Function
The head can be side-shifted a total of 26-in. This allows for side-shifting the head for rotary work, geotechnical work, and out of the way completely when using the winches.
Drill Mast
The drill mast has a class leading push and pull force (36,000/48,000 lbs) on the 3100GT Geotechnical Drill Rig
Video: Drill Mast Overview
The drill mast includes 105-in. of head feed travel. This gives you plenty of room to catch the odd interval, or to easily add a swivel under the head. Additionally, it has a class leading push and pull force (36,000/48,000 lbs).
Drill Mast Positioning
The drill mast on the 3100GT Geotechnical Drill Rig can easily be shifted exactly where the hole dictates.
Video: Positioning Options
With extend, swing, mast dump, oscillation, and fold, the operator can quickly deploy and position the drill mast exactly where the hole dictates. Drill mast outriggers let you quickly setup above a mud pan as well.
Telescoping Dual Winch Mast
The 3100GT Geotechnical Drill Rig telescoping mast extends for tripping out longer tooling.
Video: Winch Mast Overview
The telescoping winch mast reduces overall height but still allows the tripping out of 20-ft. lengths of rod when combined with the 3-ft. extension. The telescoping option allows you to set the mast height based on site and field conditions.
Manual Controls with Electrical Augmentation
The control panel on the 3100GT Geotechnical Drill Rig
Video: Control Panel Functions
The manual controls provide the tactile feel that some drillers prefer and the electric control adds safe hands-free operation.
High Capacity Hydraulics Powered from the Truck Engine
The deck of the 3100GT Geotechnical Drill Rig
High capacity hydraulics powered from the truck engine saves weight and deck space. The high flow primary pump runs at 47 gpm and 4000 psi. A separate hydraulic pump is just for the mud pump.
Swing Out 7 in. Breakout
Video: Using the Breakout
The 7-in. clamp with breakout wrench can swing directly over the hole. It is used to clamp the rods and the breakout wrench is used to separate the joints. The clamping pressure can be adjusted as well (reducing the pressure slows the clamp down and increasing the pressure speeds the clamp up).
Mud Pumps
Video: Mud Pump Overview
Pump options for the 3100GT include the Moyno® 3L6 or Moyno® 3L8 Pumps. The pump is controlled at the control panel with an on/off switch and the flow can be adjusted with a flow dial.
Hand Tool Storage
Video: Hand Tool Storage
The storage holder connected to the breakout clamp is built for holding the anvil, wrench, and split spoon. The control panel has built in trays and hooks for small tool storage.
Tooling & Accessories
Click on a section below to learn more about the tooling & accessories for the 3100GT.
Pushing CPT with the 3100GT
The 3100GT can be setup for CPT by using a few simple anchoring components: rod guide, anchor, and anchor bridge. Automatic head feed rate control advances the cone at a steady 2 centimeters per second specified by ASTM Standard D5778. This provides hands-free operation during advancement of each rod.
Switching from geotechnical drilling to pushing CPT is fast on the 3100GT. Running CPT is safe and simple.
Video: Interlocking Split Spoon Overview
The interlocking design self aligns during assembly and is quick to disassemble
Our patented interlocking split spoon sampler is a unique geotechnical innovation from Geoprobe® that is engineered to greatly benefit your field team. It is built to be 2X stronger, last longer, and saves both money and field time over a conventional split spoon. Additionally, it meets ASTM Standard D1586.
The interlocking design provides axial alignment of the tube halves, making for a quicker assembly of the sampler. Each time it goes together it self aligns, creating a perfect fit. With the threads aligned, the cutting shoe and drive head can be threaded to the split spoon. The threads are a multi-lead, which requires fewer turns during assembly and disassembly over conventional split spoons. Less time is spent during assembly and disassembly, which speeds up each test interval.
In additional to time savings, the interlocking split sheath has two times the strength and durability of conventional split spoons. Enhanced material properties and manufacturing result in greater longevity. Design plays an important role as well. Each interlocking point keeps the two tube halves engaged throughout the sampling process. The strength of these connections prevents the sampler from bulging in dense materials. It also keeps the tube halves tightly engaged even when over-filling of the sampler occurs.
*Split tube soil sampling system manufactured under U.S. Patent 9,551,188
Tooling & Accessories
Cone Penetration Testing (CPT)
Pushing CPT with the 3100GT
Video: 3100GT CPT Setup
The 3100GT can be setup for CPT by using a few simple anchoring components: rod guide, anchor, and anchor bridge. Automatic head feed rate control advances the cone at a steady 2 centimeters per second specified by ASTM Standard D5778. This provides hands-free operation during advancement of each rod.
Switching from geotechnical drilling to pushing CPT is fast on the 3100GT. Running CPT is safe and simple.
Interlocking Split Spoon
Video: Interlocking Split Spoon Overview
The interlocking design self aligns during assembly and is quick to disassemble
Our patented interlocking split spoon sampler is a unique geotechnical innovation from Geoprobe® that is engineered to greatly benefit your field team. It is built to be 2X stronger, last longer, and saves both money and field time over a conventional split spoon. Additionally, it meets ASTM Standard D1586.
The interlocking design provides axial alignment of the tube halves, making for a quicker assembly of the sampler. Each time it goes together it self aligns, creating a perfect fit. With the threads aligned, the cutting shoe and drive head can be threaded to the split spoon. The threads are a multi-lead, which requires fewer turns during assembly and disassembly over conventional split spoons. Less time is spent during assembly and disassembly, which speeds up each test interval.
In additional to time savings, the interlocking split sheath has two times the strength and durability of conventional split spoons. Enhanced material properties and manufacturing result in greater longevity. Design plays an important role as well. Each interlocking point keeps the two tube halves engaged throughout the sampling process. The strength of these connections prevents the sampler from bulging in dense materials. It also keeps the tube halves tightly engaged even when over-filling of the sampler occurs.
*Split tube soil sampling system manufactured under U.S. Patent 9,551,188
The 3100GT Geotechnical Drill Rig has multiple rotary head options mounted on a side shifting carriage.
The auto drop hammer on the 3100GT Geotechnical Drill Rig
The drill mast has a class leading push and pull force (36,000/48,000 lbs) on the 3100GT Geotechnical Drill Rig
The drill mast on the 3100GT Geotechnical Drill Rig can easily be shifted exactly where the hole dictates.
The 3100GT Geotechnical Drill Rig telescoping mast extends for tripping out longer tooling.
The control panel on the 3100GT Geotechnical Drill Rig
The deck of the 3100GT Geotechnical Drill Rig
Geoprobe® Machines
We engineer and manufacturer machines for environmental, geotechnical, exploration, CPT, geothermal, and water well applications. Below you will find more information on all of our rigs. Click on them for more information.
The Geoprobe® 8250LS is a full-size rotary sonic rig capable of running 20-ft. tooling. The GV5 sonic head provides 50,000 lbs. of dynamic force for increased efficiency in the field.
Geotechnical, Environmental, Exploration and Geothermal
The Geoprobe® 8150LS is a full-size rotary sonic rig with high performance. It is capable of running 10 ft. tooling and the GV5 sonic head provides 50,000 lbs. of dynamic force.
Geotechnical, Environmental, Exploration and Geothermal
The Geoprobe® 3230DT is ideal for geotechnical and environmental applications. The high-speed drill head easily turns augers, while the automatic drop hammer is equipped for SPT work.
The Geoprobe® 7822DT is a high-capacity direct push machine with a narrow platform. Applications include soil sampling, rock coring, groundwater monitoring, geotechnical and more.
Modular drilling rig perfect for small- to medium-sized direct push projects. It breaks into three components if necessary for easy transport to remote sites.
The Geoprobe® 3100GT Geotechnical Rig is designed to quickly perform SPT borings (augers & mud rotary), collect shelby tube samples, take rock cores, and push CPT cone.
Specifically designed for customers focused on traditional geotechnical drilling applications utilizing: hollow stem auger, solid stem auger, SPT, mud rotary, air rotary, and high speed coring.
This flexible mast option with a 20-ton capacity is specifically designed for performing CPT. It’s versatile too, with a quick mount design that allows the CPT mast to be attached to multiple platforms.
The Geoprobe® 2060CPT is a 20 ton cabin crawler used for Cone Penetration Testing (CPT). It includes many user-friendly controls to make jobs in the field quick, efficient, and comfortable.
54-in. stroke and 28,900 lb. of pulling capacity for subsurface work. Lateral movement of the unit provides for offset placement of the probe without moving the carrier vehicle.
Rugged, compact probing unit designed for tight spaces and rough terrain. This unit is narrow enough to fit through standard 36-in. doors to get to confined, enclosed places.
The DRILLMAX® DM250 Water Well Rig is the only rig mounted on a truck under CDL requirements that can handle 20-ft. drill pipe. The perfect rig for 2-in. -6-in. shallow water wells.
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