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The Process – SEDIBA DRILLING (PTY) Ltd
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STAGE

THE MOST IMPORTANT STEP WHEN INTENDING TO DRILL A
BOREHOLE IS UNDERTAKING A GEOPHYSICAL WATER
SURVEYING TEST WHICH IS VERY IMPORTANT IN
DETERMINING THE BEST POSSIBLE DRILLING LOCATION TO
DRILL A BOREHOLE. AS PER OUR MACHINERY SPECIFICATIONS
AND METHOD IN WHICH IT WORKS. THERE ARE 2 ASPECTS TO
DETERMINING THE DRILLING SPOT.
THE FIRST METHOD WILL BE THE LONG-RANGE SURVEYING
METHOD WHICH WE HAVE CONTROL OF AS TO SPECIFY THE
DEPTHS IN WHICH WE WOULD LIKE TO THE FAULT ZONE
WHICH IN MOST CASES IS SET TO A HORIZONTAL RANGE OF
400 METERS AND VERTICAL RANGE OF 150 METERS. THIS
METHOD IN ITSELF HAS 2 ASPECTS AS WELL. THE MACHINE
DETECT THE 2 CROSS DIRECTIONS WHEREBY THE FAULT ZONE
MEETS IN THE CENTER. FAULT ZONE IN SHORT WOULD BE
ROCK FORMATION THAT IS PERMEABLE AND HAS THE
POTENTIAL TO ALLOW WATER TO FLOW THROUGH IT
SHOULD THERE BE WATER.
THE SECOND PHASE TO THIS IS ONCE THE FAULT ZONE IS
IDENTIFIED. WE CAN NOW USE THE VLF SURVEY METHOD
WHICH WOULD IN TURN IS USED TO DETERMINE THE DEPTHS
AT WHICH THE ROCKS COULD BE POUROUS AND CAN
POTENTIALLY ALLOW WATER INTO THE BOREHOLE. THE
MACHINE DETECTS 3 POSSIBLE FRACTURE ZONES AND WE
CAN THEREBY EXPECT TO FIND WATER AT THE DEPTHS
SUGGESTED. THE DEPTHS SUGGESTED AREN’T ALWAYS 100 %
ACCURATE AND WE WILL HAVE TO DRILL MINIMUM
30METERS DEEPER THEN THE 3RD SUGGESTED FRACTURE
ZONE. THE MACHINE CANNOT DETECT WATER QUANTITY,
THAT WILL BE DEPENDANT ON THE AREA.
EXAMPLE OF PREVIOUS SURVEY ATTACHED BELOW

WELKOM THABONG 8230 SURVEY REPORT

STAGE

THE MOST IMPORTANT STEP WHEN INTENDING TO DRILL A
BOREHOLE IS UNDERTAKING A GEOPHYSICAL WATER
SURVEYING TEST WHICH IS VERY IMPORTANT IN
DETERMINING THE BEST POSSIBLE DRILLING LOCATION TO
DRILL A BOREHOLE. AS PER OUR MACHINERY SPECIFICATIONS
AND METHOD IN WHICH IT WORKS. THERE ARE 2 ASPECTS TO
DETERMINING THE DRILLING SPOT.
THE FIRST METHOD WILL BE THE LONG-RANGE SURVEYING
METHOD WHICH WE HAVE CONTROL OF AS TO SPECIFY THE
DEPTHS IN WHICH WE WOULD LIKE TO THE FAULT ZONE
WHICH IN MOST CASES IS SET TO A HORIZONTAL RANGE OF
400 METERS AND VERTICAL RANGE OF 150 METERS. THIS
METHOD IN ITSELF HAS 2 ASPECTS AS WELL. THE MACHINE
DETECT THE 2 CROSS DIRECTIONS WHEREBY THE FAULT ZONE
MEETS IN THE CENTER. FAULT ZONE IN SHORT WOULD BE
ROCK FORMATION THAT IS PERMEABLE AND HAS THE
POTENTIAL TO ALLOW WATER TO FLOW THROUGH IT
SHOULD THERE BE WATER.
THE SECOND PHASE TO THIS IS ONCE THE FAULT ZONE IS
IDENTIFIED. WE CAN NOW USE THE VLF SURVEY METHOD
WHICH WOULD IN TURN IS USED TO DETERMINE THE DEPTHS
AT WHICH THE ROCKS COULD BE POUROUS AND CAN
POTENTIALLY ALLOW WATER INTO THE BOREHOLE. THE
MACHINE DETECTS 3 POSSIBLE FRACTURE ZONES AND WE
CAN THEREBY EXPECT TO FIND WATER AT THE DEPTHS
SUGGESTED. THE DEPTHS SUGGESTED AREN’T ALWAYS 100 %
ACCURATE AND WE WILL HAVE TO DRILL MINIMUM
30METERS DEEPER THEN THE 3RD SUGGESTED FRACTURE
ZONE. THE MACHINE CANNOT DETECT WATER QUANTITY,
THAT WILL BE DEPENDANT ON THE AREA.
EXAMPLE OF PREVIOUS SURVEY ATTACHED BELOW

STAGE

AFTER WE HAVE FINISHED DRILLING, WE WILL DO A BOREHOLE
BLOWOUT AND AT THIS STAGE WE ACHIEVE THE GOAL OF
CLEANING OUT THE BOREHOLE AND TO DETERMINE ESTIMATE
YIELD OF WATER THAT WE CAN EXPECT FROM THE BOREHOLE.
BOREHOLE.

STAGE

SHOULD THE OPTION TO DO A PUMP TEST BE REQUIRED WE
WILL AT THIS STAGE DO THE PUMPING TEST. A PUMPING TEST IS
WHEN WE INSTALL A PUMP INTO THE BOREHOLE BY PUMPING
OUT WATER AT DIFFERENT LEVELS AND FLOW RATES IN ORDER
TO DETERMINE THE BOREHOLE CAPACITY TO GIVE AN X
AMOUNT OF WATER PER HOUR AND TO BEST DETERMINE THE
BEST REQUIRED PUMP SIZE TO BE INSTALLED SHOULD A LARGE
QUANTITY OF WATER BE REQUIRED PER DAY. THIS TEST IS
USUALLY DONE OVER A PERIOD OF 4 HOURS AND SOMETIMES
UPTO 24/48 HOURS. AT THIS STAGE THE WATER CAN BE SENT
FOR LAB TESTING SHOULD IT BE REQUIRED IN ORDER TO MEET
SANS 241 STANDARD FOR DRINKING WATER. AND NECESSARY
FILTRATION METHOD CAN BE SUGGESTED ONCE WE HAVE THE
RESULTS

STAGE

ONCE WE HAVE THE ESTIMATED YIELD OR GURANTEED YIELD
FROM THE PUMPING TEST. IT IS AT THIS STAGE WHERE WE WILL
INSTALL THE MOTOR AND PUMP WITH ALL NECESSARY FITTINGS
AND CABLES, SHOULD THE ELECTRICAL SUPPLY BE REQUIRED TO
REACH THE BOREHOLE AT THIS STAGE THE CLIENT CAN OPT TO
BRING THE ELECTRICAL SUPPLY TO WHERE IT IS REQUIRED BY
THEIR TRUSTED ELECTRICIAN OR WE CAN PROVIDE THE SERVICE
WHEREBY WE CHARGE FOR IT. ONCE WE HAVE THE PUMPS
INSTALLED WE WILL USE THE MOTOR PROTECTION AUTOMATED
CONTROL BOXES AND TEST THAT EVERYTHING IS WORKING
ACCORDINGLY.AT THIS POINT WE WILL INSTALL BOREHOLE
ENCLOSURE

STAGE 6

SHOULD A PUMPING TEST NOT BE REQUIRED OR SERVICES
PROVIDED. AT THIS STAGE ONCE WE HAVE PUMPED THE WA TER
CAN WE TAKE WATER SAMPLES AND SUBMIT THEM AT AN
ACREDDITED LAB WHERE THEY CAN TEST THE WATER TO SEE IF IT
MEETS SANS 241 REQUIREMENTS. SHOULD THE WATER NOT
MEET THE REQUIREMENTS WE CAN SUGGEST REQUIRED
FILTRATION METHOD FOR IT TO COMPLY WITH SANS 241 A ND
THE WATER WILL HAVE TO BE SENT IN AGAIN AFTER THE
FILTRATION.

STAGE 7

ONCE WE HAVE THE WATER RESULTS AND KNOW WHAT
FILTRATION METHOD IS REQUIRED AND QUANTITY WATER IS
REQUIRED. WE CAN HEREBY INSTALL THE NECESSARY WATER
STORAGE TANKS AS WELL AS FILTRATION METHODS REQUIRED
TO MEET SANS 241 STANDARD. WE WILL ALSO INSTALL FLOAT
SWITCHES INTO THE TANK TO KEEP ALL SYSTEMS AS
AUTOMATED AS POSSIBLE. IN THE EVENT THAT THE WATER WILL
NEED TO BE SUPPLIED TO THE MAIN WATER SUPPLY LINES.
DEPENDING ON THE SEVERITY OF FILTRATION METHOD USED WE
CAN EITHER INSTALL IT OR NOT BASED ON IF THE FILTRATION
METHOD WILL AGREE TO THE PIPES USED FOR PLUMBING THE
SCHOOL. SHOULD THE WATER NOT BE REQUIRED TO BE USED IN
PLUMBING WE CAN THEREFORE OPT TO PROVIDE OUTLET
ACCESS TAPS AT THE TANKS TO ACCESS THE WATER