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Greenway Contracting LCC
Introduction 1
Contact us 2
Organization Chart 3
Directional Drilling 4
Directional Drilling Applications 5
Directional Drilling Method statement 6 6
Equipment Resources 11
Commercial License 13
Thrust Boring Projects References 10
Directional Drilling Projects References 7
Thrust Boring 8
Thrust Boring Method statement 9
Dubai Municipality and RTA Approvals 12
Greenway Contracting LCC
The Greenway The HDD Professionals.
Greenway Contracting LLC Head office is located in Emirates of Dubai, U.A.E, We
are specializes in the application of Trenchless technologies, Electrical cable laying and
associated civil works.
Our focus and objective is always the safe completion of drilling and installation to
ensure the health and well-being of not only our team members, but all others related to
each project.
At Greenway Contracting LLC, we also take our responsibilities very seriously when it
comes to environmental protection and adhere strictly to all regulations, policies and
procedures. You can count on our professionalism, expertise and experience to get the
job done accurately, safely and successfully each and every time on bore holes ranging
from 2” to 24” and distances of up to 410 meters in length.
The company continues to deliver and improve on objectives through a multi skilled
workforce, Greenway Contracting LLC service consists of:
Focusing on Client objectives and providing added value.
Continuously improving Trenchless Technologies and Management Processes.
Making Health and Safety a priority in all business activities.
Managing impact on the environment.
High business principles and values.
Developing arrangements to meet future requirements and developments in the industry.
Profitably Managing the Business.
Through sharing knowledge and best practice Greenway Contracting LLC continues to
establish new clientele as well as maintain and develop existing relationships
Only then we can really be enthusiastic and take pride of the Vision we have embarked on.
We are your partner and we are "Building Your Way for the Future".
A major use for HDD is installing high pressure gas and oil
pipelines under obstacles like waterways, airports, and major roads and other large natural features or urban structures. By putting the pipeline deep underground, often in solid rock, it's
protected from damage by dredging, anchors or surface trenching. It also protects it from accidental or deliberate damage,
helping to manage risk and eliminate threats to the pipeline.
As with gas and oil, HDD can be used to carry water and
sewerage pipelines under and around almost anything. Lucas has also used HDD to drill directly into deep underground sewer
tunnels. Apart from avoiding the cost and disruption of surface trenching, HDD's ability to maintain a precise gradient and travel deep underground has dramatically reduced the
need for pumping stations, simplifying the sewerage system and reducing long-term costs.
As well as carrying conduits for fiber optic cables beneath rivers and other obstacles, Lucas
has used HDD to carry them to near-inaccessible mountain tops and microwave transmission towers. By placing them deep into bedrock beneath the coastal sands and
surf zone, these fiber-optic cables are protected in the most vulnerable part of their route.
High-tension cables can be placed deep underground, protected from damage and avoiding
surface obstacles.
HDD has a wide variety of environmental uses: draining landslip-prone hillsides, extracting
methane gas from coal seams before mining, restoring sand to beaches, creating underground barriers to reduce movement of contaminants, draining slag heaps and
rubbish dumps.
Greenway Contracting LCC
Directional Drilling Method Statement
Purpose: Install utilities (Pipes & or cables) underground, without disturbing ground surface.
As per the drawings provided for the location where directional drilling works to be
carried out, detailed information of the existing utilities, proposed route drawings and
references marks.
Carry out survey to locate all existing utilities by making trail pits and by using Electronic
detectors if necessary to trace underground utilities and then to make soil test to
understand the ground condition. A surface level is taken prior to all Drilling works.
Make a bore plan (profile)clearly mentioning all existing utilities, exact location of entry
and exit pits and the different levels in which the directional drilling (Pilot bore) is to be
carried out.
Prepare the drilling location with all necessary safety materials, machines and required
length and dia meter of HDPE pipes joined together using butt fusion welding machine.
The machine (drill unit) is anchored to the ground, location supposed to be the entry pit
with anchor stakes for proper fixing the machine.
The pilot: a sonde contained metal body with angled bit is drilled into the ground in the
desired angle as to start the pilot bore as per the bore plan or profile made.
Fluid mixing system (Bentonite mixer): the Ditch Witch FM 13 mixing system comes
with a 1000 gal mixing capacity and can attain a maximum flow rate of 300 gal per minute.
Normal flow rate used is 10 gal per minute during pilot bore and 30 gal per minute during
back reaming/pipe pulling.
The fluid: a mixture of Bentonite (pure clay oil) and water mixed in a proper proportion
to obtain good slurry is sprayed with pressure through the pilot head (angle bit) at 10gal
per minute to lubricate the drill procedure and to cool the electronic tracking device sonde
inside the pilot.
Greenway Contracting LCC
The locater: an electronic signal receiver is used to track the pilot from the ground surface.
This helps the head to deviate to desired angle and depth as the pilot is pushed by the
drilling unit without rotating and later drilled by pushing and rotating the pilot.
When the drill head reaches the planned destination it is steered to the ground surface and
obtained in the receiving place on exit pit made.
The reamer: the back reamer is designed and made in different shapes and sizes so as to
reach the user requirement according to the soil condition and size of the pipe to be
installed as the size differs from diameter 110mm, 200mm, 225mm,
300mm,350mm,380mm, 415mm, 450mm and 480mm so as to be used for installation
pipes diameter differing from 100mm,110mm,160mm,180mm,200mm,315mm,400mm
and also installing number of pipes together like 3 way,4 way and 6 way of 100 mm and
110 mm,
3-way and 4 ways of 160mm, 180mm pipes and also 3-way of 200mm pipes.
The back reaming: when the drill head is received in the exit pit it is then de-attached
from the drill pipes and a back reamer is attached to it which is then pulled back to the
entry side using slurry with a pressure depending on the soil condition (30 gal per minute
for normal soil). The back reaming process is made a number of times in different sizes to
reach the required size of drill whole for the pipe to freely run through it.
Pipe installing: a swivel is attached to the back reamer, connected to the pipes to be
installed, towing to the machine (entry pit) side. Back reaming and pulling the pipes at the
same times will allow the pipes to be installed underground without excavation, during
this process the drill fluid will assist the lubrication factor and creating a slurried area
around the drill hole for the pipe to be installed without any void.
The back reaming and pull back will continue until reamer and pipes reach the launch side
of the directional drilling, then disconnect swivel and towing head from the pipes will
complete the drilling work.
A surface level is again repeated later six months and one year after the directional drilling
job is finished as for the surface settlement limit is not more than 2mm at a period of six
months and not more than 5mm at a period of one year. The formula for maximum surface
settlement is:
Smax = 0.313 VLD2/i
D excavated diameter of bore/tunnel
I distance form bore/tunnel centerline to point of inflexion of settlement trough
Smax maximum settlement with a settlement trough
VL volume loss as ratio of notional excavated volume of tunnel
As per O’Reilly and New proposal the relation between i and Zo for normal soil is:
i = 0.28Zo – 0.12
Greenway Contracting LCC
Pilot Detail History
During Drilling we are main ting record of each Pilot for our client reference's.