Drilling rig URB 2A2: technical characteristics

The URB 2A2 drilling rig is one of the most versatile in its class. The machine is designed to create explosive and water intake wells and explore various fields. In addition, it is used in the field of oil refining, geophysics, mining, and engineering geology. Let's consider its characteristics and features.

How does the car work?

The standard URB 2A2 drilling rig is based on a reinforced load-bearing frame. It is mounted on the base of the modernized ZIL-131 vehicle. The truck has an increased cross-country ability, which allows drilling and exploration to be carried out in almost any conditions.

There is a moving hydraulic rotating mechanism with which you can perform the following manipulations:

• Raise and lower the drilling jig.
• Extend the length without leaving the face.
• Improve the quality of drilling operations.

The hydraulic drive greatly facilitates the entire process. The element is controlled using a remote control from the driller's seat. This interaction guarantees sensitive and fast drilling. The kinematic design aggregates with the truck engine using:

• Drilling type pumps (NB-50, MN-250/100, NSh-10-EL).
• Rotating mechanism, compressor, hydraulic motor.
• Transfer and transmission boxes, power take-off unit of the installation itself.

URB 2A2 equipment and our advantages

1. Reinforced mast. Strength characteristics for bending and torsion are 1.7 times greater compared to a standard mast. The structural properties of the platform have been improved.
2. Italian return filter with a contamination sensor, which allows you to avoid emergency situations when starting at low temperatures, capacity up to 400 liters. Compared to the standard 200 liters.
3. The filler neck of the tank is equipped with filter elements.
4. The transfer case and rotator of the unit are being run-in on a test bench.
5. RVDs are placed in plastic protection.
6. The hydraulic system uses safety valves made in Italy, which increases reliability.
7. The carriage moves on rollers, which increases its service life and further increases the centering and stability of the carriage.
8. There are 2 Italian lifting and rotation speed regulators.
9. Hydraulic distributor with increased flow capacity up to 180 liters.
10. The floating valve in the hydraulic distributor is barely at the bottom, allowing the drilling tool to be fed without load under its own weight.
11. An emergency hydraulic pump (manual) is installed, which allows you to manually raise the outriggers and lower the mast.
12. Hydraulic cylinder: lifting the hydraulic jack mast, outriggers - equipped with independent hydraulic locks, which allows you to avoid an emergency situation due to bypass of the main cycle.
13. The control panel canopy protects the drilling rig operator from the removal of drilling rock and rain.
14. A throttle adapter is installed for raising/lowering the boom, which prevents a sharp fall of the boom if the hydraulic system or hose is damaged.
15. Oil tank 400 liters.

For all questions about a profitable purchase, you can contact the hotline and receive answers at any time of the day. Do you want to earn good money? Call us on our toll-free hotline 8-800-500-44-74.

Description of the URB 2A2 drilling rig

The equipment in question can also be installed on a tracked or sled-type base. These options are included as optional extras. It is made to order, since the URB 2A2 operates from a power unit of its own wheelbase; the machine is not capable of operating autonomously without providing additional power.

The main advantage of the technology under consideration is the design, which is entirely made using domestic technology using exclusively Russian parts. This factor makes it possible to reduce the cost of operation without losing quality. In addition, special equipment has high maintainability with the ability to order the required spare parts with the fastest possible delivery. Since all consumables are produced at specialized factories in Russia, when ordering parts there is no need to wait several months, as is the case with foreign suppliers. The URB 2A2 drilling rig can be operated in the most difficult conditions. The car performed well in Yamal and Yakutia.

The agony of choice. Drilling rig drive for engineering geology.

May 15, 2019
During engineering-geological and engineering-geotechnical surveys for construction, mainly drilling rigs with movable rotators mounted on self-propelled wheeled and tracked vehicles are used and, despite the fact that over the past ten years many new manufacturers have appeared in Russia promoting their models of drilling rigs for the segment of engineering geology, the most common and popular are hydraulic drilling rigs URB-2A2 and their modifications, which have a hydraulic drive of the rotator and feed mechanism, and PBU-2 rigs with a combined drive: mechanical drive of the rotator and winch, and hydraulic drive feed mechanism.

The main technical characteristics of the installations under consideration are summarized in the table.

Hydrofed drilling rigs, regardless of the company by which they are manufactured, have obvious advantages - high ergonomics and safety, the ability to smoothly adjust the rotation speed of the drilling tool, a minimum volume of moving mechanical parts, primarily subject to wear, the potential for relatively quick installation and dismantling of leaked failure of units and additional hydraulic drive mechanization requires increased attention to maintenance, the quality of the hydraulic oils used, and the hydraulic equipment used is usually manufactured abroad, which affects the cost and delivery time of spare parts.

The drive of oil stations of hydraulic units requires the use of more powerful power units than the drive of a mechanical transmission due to the relatively low efficiency. hydraulic systems, resulting in increased fuel consumption.

Units with a combined drive are less presentable than their hydropowered competitors, but at the same time they are not so demanding on the qualifications of maintenance personnel, the quality of fuels and lubricants and spare parts, and in general they are more reliable and economical without compromising productivity.

An example of a successful design of an installation of this type is PBU-2, which has been used in engineering-geological and geotechnical surveys for over twenty years.

The basic drilling rig, mounted on its own frame, equipped with a deck engine and a winch with controlled free discharge, provides the implementation of almost all the technologies necessary for effective testing and field research of soils.

Many years of positive experience in the use of drilling rigs of the PBU-2 type for engineering-geological and geotechnical surveys in a variety of geographical (from the Arctic to Equatorial Africa) and geological and technical conditions is objectively confirmed by the stable - even against the backdrop of a protracted economic crisis - demand for this technical tool and friendly reviews from specialists who operate this “workhorse”.

Peculiarities

This equipment is used for geological research, with the possibility of exploration at any level up to 300 meters. It is also used to create water intake wells constructed for the purpose of arranging water supply systems for various purposes (industrial and domestic use). A special feature of the machine is the possibility of synchronous washing or blowing of the processed drifts. It is worth noting that the overall process does not stop, which ensures uninterrupted work.

The connection and disassembly of pipes is carried out using screws using a rotator, which eliminates the use of additional devices. Thanks to the presence of a hydraulic cylinder that provides lifting and lowering manipulations, even when drilling with pneumatic hammers, the required constant pressure on the bottom is controlled.

Technical characteristics of the URB 2A2 drilling rig

Below are the parameters of the technical plan of the technology in question:

• The starting diameter of the work is 19 cm.
• Well drilling depth (geophysical/structural/auger/) – 100/300/30 m.
• The same indicator for blowing is 30 m.
• The maximum final drilling diameter is 11.8 cm.
• Speed ​​(1/2/3 speed) – 140/225/325 rotations per minute.
• Torque (1/2/3 speed) – 2010/1210/830 Nm.
• The pressure indicator in the system is 100 kg/cm2.
• Loading capacity of the mast/tool ​​– 6000/4600 kgf.
• Dimensions – 8.08/2.5/3.5 m. In working position, the height reaches 8.38 m.
• Weight – up to 13.8 tons.
• Compressor type – KSBU-4VU1-5/9.

Technical characteristics of special equipment

The following technical parameters of the URB 2A2 drilling rig are distinguished:

• weight of all equipment – ​​10 tons;
• maximum torque reaches 2010 Nm;
• load capacity – 51 kN;
• initial diameter of the drift: when blowing - 118 mm, when washing - 190 mm, when using augers - 135 mm;
• starting diameter (during drilling) – 19 cm;
• drilling depth of geophysical wells – 100 m, structural – 300 m, auger – 30 m.

Design of the URB 2A2 drilling rig - kinematic diagram

Exploitation

The URB 2A2 drilling rig is equipped with a hydraulic system with pressure gauges that guarantee optimal operation of the mechanism. Using special filters, the oil is purified, which allows you to extend the operating life of the units several times. The installed mechanical type emergency pump allows you to manually deactivate the installation in the event of a vehicle breakdown.

Lifting of the working tool is provided in four modes: normal, emergency, fast and slow. It can be hung in any of the elevated positions thanks to the supporting retractable jacks. The tool can also descend in several modes. A simple but reliable hydraulic system allows full control of the unit without any problems.

The power take-off is equipped with one gear and a clutch. The part is fixed in the upper compartment of the ZIL transfer case housing. Activation of the transfer case of the installation itself is carried out via a cardan shaft and a power take-off unit. Using this block, rotation is transmitted to drilling and oil pumps.

Rotator

The rotation mechanism of the URB 2A2 drilling rig, the photo of which is available above, includes a box with three shafts and the same number of speeds, as well as cylindrical and gear elements. The rotator is housed in a cast steel housing, which ensures the strength and reliability of the unit. The control panel adjusts the spindle speed, from zero mode to maximum.

The hydraulic feed jack includes a rod and cylinder that takes part of the reaction load. The unit is equipped with one stage of pair action. The mast has a U-shaped configuration, made of channels with additional cross members. In the inner part there is not only a jack, but also two pipes on which the load is applied. This solution allows you to optimize the operation of the drill in difficult conditions. The centering table makes the tool easier to use.

Other mechanisms

The URB 2A2 drilling rig includes a traveling system that allows doubling the stroke of the rotating device; it has a reinforced design with two tensioning devices.

The elevator is responsible for screwing or unscrewing working pipes and tools. It has a high-quality mount and device, and is easy to operate. Auger chucks make it possible to build up and lift assemblies safely while controlling drilling quality. The structural features of the rotational device allow for double the speed of movement. The mast is automatically transferred to the transport position in the event of failure of the drive motor or transmission. The base vehicle is unloaded using support jacks.

Design features

The main working mechanism is mounted on a durable supporting frame, which is mounted on an improved ZIL-131. The standard package includes a two-axle trailer designed to transport:

• pipes;
• working tools;
• auger

Components for drilling rig URB 2A2

Thanks to the presence of a jib crane, all necessary materials are loaded and unloaded.

A movable rotator with a hydraulic drive ensures the raising and lowering of the drilling tools used and the extension of pipes without interruption from the work process. The productivity of equipment also increases significantly without the use of additional mechanisms.

The drill rotates from the car engine through the gearbox at a speed of 1800 rpm. This unit is equipped with an emergency oil pump. It allows you to move the rotator and lay the mast. There are also pressure gauges that control drilling parameters. The speed of the rotator can be doubled using a traveling system (there are two tensioning devices).

Scheme

Below is a schematic image of the URB 2A2 drilling rig, the characteristics of which were discussed above, as well as an explanation of the digital designations.

1. Mud pump assembly.
2. Power take-off box.
3. Pump drive.
4. Hydraulic type jack
5. Compressors.
6. Handout.
7. Lifting cylinder.
8. Rotational mechanism.
9. Carriage.
10. Elevator.
11. Auger cartridge.
12. Sealing unit.
13. Working mast.
14. Support jack.
15. Traveling equipment.
16. Control system.
17. Basic vehicle.
18. Frame.
19. Distributor.
20. Hydraulic unit piping.