r - part - usaid

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