Oferta
Horizontal Directional Drilling
OFFER
The NAWITEL company's offer includes perform drilling and development of pipes ( steel and PE) with the following parameters :
- max . pipe diameter Ø = 1400mm
- max . drilling length Lmax = 2900m
Depending on the complexity of the task and geological conditions , and selected by us right set of drilling , which will ensure the proper execution of the task , while optimizing manufacturing costs ( which directly translates into the price of the service ) :
|
Drilling Rig |
SCOPE OF WORK |
GEOLOGICAL CONDITIONS (soil category) |
|---|---|---|
|
Prime Drilling PD250/90RP |
L max.= 2900m, Ø max. = 1400mm |
I - VII |
|
Herrenknecht HK100C |
L max.= 1800 m, Ø max. = 1200mm |
I - VII |
|
American Augers DD100B |
L max.= 1200 m, Ø max. = 1000mm |
I - VII |
|
Vermeer Navigator D75x100 |
L max.= 800 m. Ø max. = 600 mm |
I - VII |
|
Vermeer Navigator D36x50 II |
L max.= 300 m, Ø max. = 600 mm |
I - IV |
| Vermeer Navigator D24x40a | L max.= 300 m, Ø max. = 400 mm | I - IV |
|
Vermeer Navigator D24a |
L max.= 150 m, Ø max. = 315 mm |
I - IV |
|
Vermeer Navigator D7x11a |
L max.= 60 m, Ø max. = 160 mm |
I - IV |
Each of the above equipment included every element of the drilling set, ensuring independent execution of the task (including any pipes in lengths up to 12 m) .
TECHNIQUE
That is one of the most effective methods of trenchless technology construction of pipelines need for underground installations . It allows the development of pipes in almost all soil conditions .
The works are divided into three stages :
- Stage I- Pilot drilling
During this step, a hole is made in the design to the predetermined trajectory. Tool which mold the ground in this step is the most common- plate (hydraulic mold), or in more severe geological conditions- drilling bit (jetting or crumbling structure geological layer ) . Trajectory of drilling is controlled by various types of navigation systems , which allows for the proper execution of the hole in terms of the position of the axis . The cutters created during drilling are emptied by the drilling fluid .
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- Stage II- Reaming
In this part of the works , it expands previously developed a pilot hole for installation pipe with a diameter assumed . The ground is mold by using various types of reamers to a diameter greater by 20 % - 50 % of the diameter of the pipe which is installed in the borehole ( not the values are fixed but closely related to the geological conditions at the work site ) . The cutters are formed as a result of reaming geological layers and emptied from the bore by drilling fluid .
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- Stage III - Installing pipe into the hole
The final stage is a installing productive pipe in borehole- pulling pipe into hole by using special pulling head. Cutters is the remains of excavated material and polymer additives in the scrubber minimize friction between the pipe and the wall of the borehole , which facilitates the installation of the pipe in the hole by reducing the axial forces (torque ) and tangential forces.
Guided Pipe Jacking
OFFER
NAWITEL's offer includes the obstacle crossings by method guided pipe jackig for few kind of pipelines: stoneware pipes, basalt pipes, polymer concrete , reinforced concrete , steel and GRP:
L max . = 60 m , diameter DN150 - DN600 mm
TECHNIQUE
The technique of guided pipe jacking allows the execution work in various ground conditions in urban areas for various types of obstacles with the possibility of precise controls the direction of drilling , through the high accuracy of the method it is a good choice for gravity sewers.
- Stage I- Pilot drilling
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- Stage II- Reaming and pushing steel casing
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- Stage III- Pipeline installing and casing removing
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Microtunneling
OFFER
NAWITEL's offer includes execution by using microtunnel method for building pipelines made of: stoneware pipes , concrete , polymer concrete , GRP and others.
• L max . = 150 m , diameter DN400 ( DZ 560 ) to DN1000 mm ( DZ1099 ) set to microtunnel Herrenknecht AG
NAWITEL's offer includes execution by using microtunnel method for building pipelines made of: stoneware pipes , concrete , polymer concrete , GRP and others.
• L max . = 150 m , diameter DN400 ( DZ 560 ) to DN1000 mm ( DZ1099 ) set to microtunnel Herrenknecht AG
TECHNIQUE
Mikrotunnelling is often referred to as a highly automated and computerized method of trenchless construction of underground pipelines, technology, single-stage hydraulic jacking. This method involves using a tunneling/drilling shield while the drill pipe are jacking,when the process is almost totally automated. It is a technology for single-step execution pipelines. The control is possible by jacking the special articulated head, the position of which is changed by means of hydraulic control cylinders.
The process of pushing pipes is measured using the laser beam, which ensures a very high accuracy in the hole. Beam laser placed in the rear part of the initial excavation is received by the electronic receiver equipped with a target plate, here are transmitted to the control station the necessary information about the position of the axis of the drill head, where they are processed and recorded. Control of the entire process microtunnelling is done with the help of a computer. In this method it is possible to embed pipeline, whose route runs along the arc.
Mikrotunnelling is often referred to as a highly automated and computerized method of trenchless construction of underground pipelines, technology, single-stage hydraulic jacking. This method involves using a tunneling/drilling shield while the drill pipe are jacking,when the process is almost totally automated. It is a technology for single-step execution pipelines. The control is possible by jacking the special articulated head, the position of which is changed by means of hydraulic control cylinders.
The process of pushing pipes is measured using the laser beam, which ensures a very high accuracy in the hole. Beam laser placed in the rear part of the initial excavation is received by the electronic receiver equipped with a target plate, here are transmitted to the control station the necessary information about the position of the axis of the drill head, where they are processed and recorded. Control of the entire process microtunnelling is done with the help of a computer. In this method it is possible to embed pipeline, whose route runs along the arc.
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