Dewatering services in Nigeria from Lagos to Port Harcourt by M&R Integrated Services Ltd The vertical wellpoint dewatering system works by the aid of vertical wellpoints connected to a headerpipe system and a dewatering pump the whereby the ground water is artificially and temporarily lowered. More info at www.mr-integrated-services.com

1. CONSTRUCTION REHABILITATION MAINTENANCE DEWATERING
MAINTAINING A RELIABLE CONNECTION
IN NIGERIAN OIL & GAS

2. CONSTRUCTION REHABILITATION MAINTENANCE DEWATERING
M&R Integrated Services Ltd. primarily operates in the upstream Oil&Gas and related sectors
from Warri, Nigeria specializing in steel construction & fabrication including all other related
disciplines such as surface preparation, paint and coating systems. We further provide indus-
trial cleaning, including UHP Water-jetting, and have recently expanded into civil engineer-
ing by providing dewatering services. We established our company to diversify and execute
all activities provided by Linepipe Ltd who have built up an excellent reputation and track
record since 1995.
We have the natural desire to do things right and aim for delivering to the highest standard.
We strongly believe that the key to success is to be reliable, open and honest towards our
Clients. We take responsibility for getting the job done and always complete our projects,
no matter how challenging.
Our company is the result of a long
lasting relationship of its Dutch and
Nigerian directors which dates back
to 2001 when they constructed
Chevron’s Dibi field accommoda-
tion barge in their roles as Main and
Subcontractor representatives.
The solid relationship combines
local experience with international
access to equipment, knowledge,
goods and services.

3. CONSTRUCTION REHABILITATION MAINTENANCE DEWATERING
DEWATERING
When excavations fall below the groundwater table water must be re-
moved from the saturated soil to prevent slopes from collapsing. Depend-
ing on the technology that is used to lower the ground water table, the
difference is being made between well-points, horizontal dewatering and
deep-well dewatering. M&R Integrated services can now offer all three of
these services.
Well Point Dewatering M&R Integrated Services Ltd provides dewatering through vertical well-
points in cooperation with MOS Grondwater techniek. A large Dutch com-
pany with over 100 years experience in dewatering. They have executed
many large international contracts including Nigeria for EGTL Escravos in
2005 MOS
Our partnership enables us to:
• Provide soil engineering capability
• Provide deep-well and horizontal dewatering.
Multi Stage Dewatering • Execute large scale projects
Together we are able to execute large jobs and provide Clients with com-
plete dewatering solutions. As our standard we provide vertical well-point
dewatering and this can be mobilized directly from our yard in Warri, whilst
equipment required for deep-well and horizontal dewatering will need to
be mobilized from the Netherlands.
In November 2012 M&R Integrated Services Ltd signed a major contract
CHEVRON EPWDP project1 with Gramen Petroserve Nigeria Ltd, where M&R will provide dewatering
services to enable excavations for foundation installation.
MOS Grondwatertechniek
Gyroscoopweg 120
1042 AZ Amsterdam
Telefoon: 020 7537980
Telefax: 020 7537989
www.mos.nl
MOS Escravos 2005 Deep Well Dewatering

4. CONSTRUCTION REHABILITATION MAINTENANCE DEWATERING
MAINTENANCE
DEWATERING
Well-points are jetted into the soil and each well-point is connected to a
header pipe to collect the water connected to piston-pumps creating a Jetting
vacuum. The water is pumped away which lowers the groundwater ta-
ble. Excavation depths up to 6m can be handled with a single stage well
point system. If excavations are deeper either deep-wells or a multistage
system is required.
A horizontal dewatering is a similar system where the well-points are re-
placed by a horizontal drain. Deep-wells are drilled with a large diameter
which allows submersible pumps to be installed so that there is no vacu-
um limitation and very deep excavations can be achieved. Pumping
ENGINEERING
Dewatering costs can vary hugely and this completely depends on the
soil and excavation parameters. High permeability of soil requires a large
amount of pumps and well-points to keep the excavation dry whilst a low
permeability only requires a limited number. Soils such as clays and rock
are generally not suitable for dewatering. By performing soil investigation
and hydrological modeling in advance surprises can be avoided and
costs can be predicted accurately. Installation
Through our partner MOS Grondwater techniek in the Netherlands we
are able to perform detailed hydrological calculations to predict the
dewatering requirements. Experienced advisors use their knowledge of
dewatering to find the most practical and innovative solutions for ground
behaviour and construction. Through the usage of advanced programs
they are able to create models for every excavation or building pit.
Hydrological Modelling
Dewatering Pumps 4” HDPE Header Pipes Submersible Pumps