INTRODUCTION TO SIWES
Purpose:Equip students with industrial skills and
experience.
History: Established by the Industrial Training
Fund (ITF) in 1973.
Objective: Bridge the gap between theory and
practical application
4.
ORGANIZATION OVERVIEW
Name: EldeeGroup of water drilling &
Geophysical Survey.
Location: Oraifite, Anambra State
Specialty: Borehole drilling, Groundwater
surveys, Environmental assessments.
Established: 2004
5.
BOREHOLE DRILLING OPERATIONS
Theprocesses of pre-drilling operation include:
Preliminary oral investigation: To get
information about the geology of the area
Inspection of the site: To study relief and
vegetation
Geophysical survey: To study the character of the
formation.
Site preparation: To mobilize equipment, clearing
and construction of pits and channel
6.
GEOPHYSICAL SURVEY TECHNIQUES
MethodUsed: Electrical resistivity method
Equipment: Terrameter, electrodes, and cable
reels.
Purpose: Map subsurface geology and locate
aquifers
7.
BOREHOLE DRILLING TECHNIQUES
Mud rotary drilling
Fluid is pumped down the drill pipe and out of jets in the drill bit.
The fluid carries cuttings to the surface, where it is recycled.
Suitable for unconsolidated rock formations.
Air Rotary Drilling:
Drill bit rapidly rotates to cut through rock formations.
Air is used as the circulating medium to cool the drill bit and carry cuttings
to the surface.
Best for consolidated rock formations.
Steps:
Geophysical survey → Drilling → Casing →
Gravel packing → Pump testing.
8.
EQUIPMENT USED INBOREHOLE DRILLING &
BOREHOLE STRUCTURE COMPONENTS
Motorized Drilling Rig
Drilling Bits (Clay Cutter,
Diamond Bit, Hammer)
Drilling Rods and Casing
Pipes
Compressors and Pumps
Gravel Packing and
Grouting Tools
Drilling Depth: Varies based
on geological conditions.
Borehole Diameter: Typically,
8 inches.
Casing Pipes: Prevents wall
collapse and ensures water
quality.
Gravel Packing: Stabilizes
formation and prevents fines
from entering.
10.
CHALLENGES IN SIWESAND BOREHOLE
DRILLING
Limited supervision due to inadequate funding.
Employers’ limited time for student training.
Expensive equipment and tools.
Difficulty in deepening existing boreholes
11.
BENEFITS FROM SIWES
Practicalexperience with electrical resistivity for
groundwater exploration.
Borehole drilling supervision.
Effective teamwork and client interaction.