Introduction 1 2 Directional Drilling Applications 5greenwaycont.com/Profile.pdf · Directional...

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


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".

For Greenway Contracting LLC

Dubai.U.A.E


Contact us.

Contact Us Tel. : +971 4 2726833 Fax : +971 4 2726813 E-mail : [email protected]

Head Office

Post Box No. 97864

Dubai, United Arab Emirates

mailto:[email protected]


Organization Chart.

M.Khalid General Manager 050-4620919

Sherayaz

Civil Engineer

Adam officer Muhammad Jamel

Baber Khan

Safety officer

Assistant

Driver

PRO

Anoop

Locator

050-3604510

Chemical Engineer

Mud Man

2 Nos Helper

4 Nos

Assistant

Driver

Directional Drilling GPR System

Driver

3 Nos

Navaff Operator

Thrust Boring

Ahmed Faraz Operator

Driver

Assistant

Driver


Directional Drilling Machines

HHHooorrriiizzzooonnntttaaalll DDDiiirrreeeccctttiiiooonnnaaalll DDDrrriiilllllliiinnnggg VVViiieeewww


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.


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.


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


Pilot Detail History

During Drilling we are main ting record of each Pilot for our client reference's.

Daily Site Report

Client : Date :

Consultant : Project No. :

Utilities check list: Type of Drilling :

Rod No.

Position of pilot Head

Angle

Depth

Remarks : _______________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

Site Supervisor Client Representative


SITE SAFETY CHECK LISTS

Contract Ref:

Date of Inspection : Time :

Work Description / Location :

Sl. No. Item to be checked If OK

√

Not OK

Х

Not

Applicable

Remarks

1. Wear appropriate Personal Protective

Equipment (P.P.E.), e.g. helmets, safety shoes, goggles, masks, gloves,

safety belts, ear plugs etc.

2. Accident & Near misses recorded &

investigated

3. Safety & Warning signs placed

4. Safe pedestrian access to buildings and roads to be provided

5. Protection & support to under-ground

utility services

6. Sides are shored / sheathed

7. Open excavated area being

barricaded

8. Road side / Public area to be warned with flashing lights during night time

9. No Environmental Impact

10. Excavated material are stacked

properly

11. Site kept clean

12. Electrical sockets, connections, lifting equipments and machineries

13. First Aid Kit

14. Proper lighting arrangement during night work

Notes :

……………………………………………………………………………………………………………………………………

……………………………………………………………………………………………………………………………………

Name of Inspector: …………………………………………………. Signature: …………………………………


Butt Welding of PE pipes

Butt Welding is the most common method to joint HDPE pipes, stub ends, tees, elbow, bends etc.

The pieces to be welded are not added any welding material but the surfaces to be pointed are heated up by

means of a heater plate. The melted surfaces are then pressed together and the molecule chains will thus

intrude each other and form a strong joint. There is no chemical connection between the molecule chains;

the strength of the joint is based mainly on cohesion between the molecules.

The pressure applied in the weld will vary from stage to stage of the welding operation. For each size of a

welding machine the respective hydraulic pressures to be used for different outside diameters and wall

thickness.

Provided that the pipe ends are properly trimmed butted and aligned, the ends softened by the heat will

fuse and will remain so when the weld cools. A small bead has been formed inside and outside during the

operation.

The butt-welding is carried out with machines specially designed for this purpose. The machines have a

strong body frame, guide rods for the pipe end trimmer electric heater plate. The compressive thrust is

produced hydraulically or by means of lever or spring mechanism. To achieve a good welding result one

always has to use a machine for the operation.

Working Procedure

The Butt fusion operation is divided in to the following steps:

Fixing of pipe to the machine

Aligning and trimming of pipe ends

Heating up of surfaces to be welded

Removal of heater plate

Welding

Cooling

Dismantling of the pipe from the machine Inspection


Project References

Client : Dubai Municipality

Location : U.A.E. (Dubai)

Scope of Work : Directional Drilling

Purpose : DEWA Power cable (HV and LV cables)

Pipe Type : H D P E

Diameter of Pipe User : 110 mm / 160 mm

Length of Drilling : 2000 Lm

Work Schedule : 2007, completed

Machines Use : Ditch Witch 2720, Trailer, and Water Tanker and

Mitsubishi Pickup with Hulbe Crane

Manpower : Drilling Team of 6 Persons

HDPE pipe welding Team of 3 persons

Client : Time Electro & Contracting Company

Location : U.A.E (Dubai, Abu Dhabi )


Purpose : HV and LV cables for DEWA & ADEWA

Pipe Type : H D P E

Diameter of Pipe User : 110 mm / 160 mm / 200 mm

Length of Drilling : 1500 Lm

Work Schedule : 900 Lm completed and still going on




1

2


Client : K.C.C (Kuwait Contracting Company)




Pipe Type : H D P E


Length of Drilling :250 Lm

Work Schedule : 2007, on going





Client : Ghantoot Gulf Contracting.


Scope of Work : Directional Drilling.


Pipe Type : H D P E


Length of Drilling :850 Lm

Work Schedule : 2007, on going





3

4


Client Centaur Electromechanical Contracting Company Location : U.A.E (Dubai - Jabel Ali)


Purpose : HV cables

Pipe Type : H D P E

Diameter of Pipe User : 160 mm

Length of Drilling :1400 Lm on Schedule

Work Schedule : 2007 and still going on

Machines Use : Ditch Witch 2720, Trailer, Water Tanker and



Client : Heliopolis

Location : Dubai U.A.E


Purpose : 11KV Cable Laying in Dubai

Pipe Type : H D P E

Diameter of Pipe User : 160mm

Length of Drilling : 400Lm

Work Schedule : 2007 & Still going on

Machines Use : Ditch Witch 2720, Trailer, Water Tanker.


5

6


THRUST

BORING


Thrust Boring

Thrust Boring is also part of “Greenway Contracting LLC” service rendering to our valuable

customers. In this field we are in well experienced hand and never fail to develop and use modern

method and strategy.

To handle such type of works we can able to do Thrust Boring from

4” to 56”. We are using American Machine Ditch Witch to work from

4” to 20” and another machine bore it type fro 12” to 30”, and Boland

Machine for 30” to 56”.

We done major works by using this machinery as mentioned in list of job carried out.

Thrust Boring Views


Thrust Boring Method Statement

Set out thrust receiving pits as per approved drawing ensuring that the location is free

of obstruction and services.

All safety measures needed are to be taken in to consideration prior commencement of

excavation, including warning taps and concrete barricades.

Thrust and receiving pits shall be excavated as per relevant approved drawings,

nothing that trench shall be free of water by using dewatering pump at all times,

during the operations, if found necessary.

The dimension of the Thrust pit shall be 10 meter long with a width of 2 meter for

jacking 6-meter long pipe sleeves. If 3 meter long sleeves to be used, only the length

of the Thrust pit shall be 7 meter depth to decided by the consultant / Client. But

normally, the required for 200mm dia casing is between (1.2 to 1.5) meter and for

300mm dia the depth is between (1.5 to 2) meter.

Thrust and receiving pits excavation shall be 3 meter away from the edge of the road

asphalt or 2 meter from the edge of the footpath.

Thrust pit shall be leveled and compacted to provide solid bid for the guiding tracks

for proper alignment and level fixing at the required depth. Concrete thrust blocks

shall be firmly fixed in excavated trench.

If the crossing is longer than 30 meter, it is recommended that 5cm thickness of the

concrete to be castled in the Thrust pit to provide solid bed for proper alignment.

Thrust boring machine shall be installed in driving (Thrust) pit. The cradle guides shall

be installed in front of machine to the correct line and level.

Procedures


300 or 200mm steel sleeves pipes 6 meter a long as required, shall be used in driving

operation which will be initially slow to ensure that thrust boring is to the correct level

& alignment. The spoil shall be retraced from the driving pit side.

Prior to work commencement, level control points shall be established to keep level

monitoring during Thrust bore operation. These points to be fixed at edges and center

of existing asphalt read. Level check by assigned surveyor to be recorded before,

during and after completing proposed Thrust bore.

6 / 3 meter length of 200 / 300mm dia steel pipe sleeves shall be jacked with

consequent 6 / 3 meter length pipe welded and jacked in the same manner.

The driving operation shall be continued till the head of cutter appears in the receiving

pit side. At this stage, the auger shall be retracted from the driving pit side.

While taking all precautionary measures to avoid any settlement to the existing asphalt

road as per requirements of concerned departments and applicable specification.

Once NDRC operation has been completed, the equipment shall be dismantled. The

contractor shall reinstate the area.

Tolerances of misalignment (Vertical / Horizontal) are to be according to Contract

specifications. i.e. The line and grade combined is 200mm / 100m. Installed pipes in

the casing will be tested separately.

Removing of excavated material outside of pit from 6” to 12” by manually. If it is

more than 12” up to 30” by manual with our crane.

Thrust Bore works under rock area

Various types of special cutter heads used for different types rocks. Under rock area

special heads used for as shown.


Minimum depth of cover over the crown of casing pipe shall be according to the

requirements of contract.

Minimum clearance between the thrust bit and edge of the road according to the

requirement of contract.


Project References

Description : Electrical Cable Laying

Location : Dubai

Length of Crossing : 1,200 m

Description : Electrical Cable & Pipe Laying

Location : Dubai

Length of Crossing : 1,000 m

Description : 6” Upvc Pipe

Location : Abu Dhabi & Dubai

Duration : 3 Months Length of Crossing : 850 m

Description : 6” Upvc Pipe

Location : Dubai

Duration : 3 Months Length of Crossing : 1,200 m Description : 6” Upvc Pipe

Location : Dubai

Duration : 3 Months Length of Crossing : 125 m

Client : M/s Gulf Sand

Client : Kuwait Cont. Co.,

Client: Time Electro Co.,

Client: Econ.

Client: M/s Ghantoot Gulf Contracting,


Equipment Resources

S No. Name of the Machine Brand No. Boring Dia. Make Quantity

1 Ditch Witch – Jet Track 2720 04” to 20” USA 1 Nos

2 Wamet Thrust Boring Mach. TP 56 30” to 56” Boland 1 No

3 Bor-It Thrust Boring Mach. 24 12” to 30” England 1 No

Water Tanker : 2 No

JCB Back Hoe Loader : 1 Nos

Bob cat : 1 No

Dewatering Machines : 4 Nos

Jetting Pump : 1 No

Steel Welding Machines : 3 Nos

Upvc Pipe Welding Machines : 2 No

Small Vibrating Roller 4 Ton : 1 No

Electric Generator BSP 7500 : 3 No

Sub site 750 Tracker Beacon Locator : 2 No

Sub site 66 TKRW Tracker Beacon Locator : 2 No

Trailer Flat : 2 Nos

Vacuum Tanker : 1 No

Mercedes Pickup with Haibe Crane : 2 Nos

Mitsubishi Pickup with Haibe Crane : 1 No

International Truck – Bentonite Mixer : 2 No

Mitsubishi Pickup with Haibe Crane : 1 No

Mitsubishi D cabin Pickup : 2 Nos

Machineries

Pickup with Haibe Cranes

Joint is not

to be

accepted.

Low

pressure

has resulted

in a too low

bead.

Joint is not

be

accepted.

Bead has a

sharp notch

reaching

the wall

thickness.

Welding

temperatur

e too low or

plate

removal

time (open

time) too

long.

Unacceptabl

e joint as a

result of

poor line-

up.

Maximum

allowed

deviation is

10% of wall

thickness

when

straight

joint is in

question.

Joint is not

acceptable.

Pipe with

thicker wall

should

preferably

be beveled.

The Welded

pieces have

different

melting

temperatur

es or the

temperatur

e of the

heater plate

has been

different.

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