r - part - usaid
r - part - usaid
r - part - usaid
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provided during this proSect I3 all drillers, in this aspect of<br />
operations* The training manual prepared - - for drillers<br />
emphasizes the need to be rrgazized prim to leaving for the<br />
field.<br />
Drilling procedures in any one area of the country tend to<br />
be similar, For this reason, drilling forexen were shifted<br />
between the three rigs to learn different drilling techniques,<br />
Those having experience w ith mud rotary operations were shifted<br />
to the rigs using air harmer techniques and vice versa.<br />
Drillers working on mud rotary rigs were train@< in the use<br />
of different mud viscosities and in the recovery of lost<br />
circulation. Recovery of lost circulation became an extremely<br />
important factor in wells in the Central Rangelands. Drirlers<br />
working on air rotary rigs learned a ir haraer techniques wfth<br />
the use of drilling faam- Cable toof rig training was less<br />
intensive because WDA personnel were fairly well ex~erienced<br />
with this method. The cable tool equipment had been in country<br />
for some time, and the crew assigned this rig were established<br />
ir. their haSits. Attenpts were made to demonstrate how drilling<br />
cauld proceed at a faster rate, however, this effort was not<br />
uelf received.<br />
A major handicap that existed throughout the prcject was<br />
+he lack of qualified welders on the rigs. On most privately<br />
owned drilling rigs, the chief driller and usually one other<br />
person are experienced welders. Unfortunately, for reasons<br />
unknown tg the Consultantsf staff, welding was not regarded as a<br />
respected profession. Through the efforts of the project, this<br />
stigna was to a large extent renoved. Most drillers and/or<br />
assistant drillers became receptive to training in the basics of<br />
arc welding.<br />
Coincident w ith training in the art of welding, was the<br />
txeining provied in the Instzflation of casing. This involved<br />
insuring that casizg Lengths were properly measured and<br />
recorded, and That casing lengths were correcrly aligned prior<br />
to weldi~g.<br />
Before zny potentially producisg borehale can be considered<br />
a well, it m~st be adeq~ateiy developed. Development is used<br />
here to mean the renovel of the aud cake from the galls of the<br />
Sorehole in6 in <strong>part</strong>icular the area opposite the water producing<br />
zone. Xx the case of holes drilled wfth air or by cable tool<br />
~ethods, development means the removal of fines. Although<br />
eyipmsnt rox rigor~us well de-*=lopmen", was not available,<br />
drillers were trained to thoraughly clea the AsPe by either<br />
circnlati~g clean water and/or by blowing with air. Additional<br />
air zcmpressors, air 2ettizg tools, and chemicals were not<br />
avaiLa5le nor deezed necessary in xost cases.