Operator's Manual

Giventheaboveinformation,youcancalculatethe
numberofrodsrequiredtoreachyourbeginningpoint
attheappropriatedepth.T ororecommendsthatyou
starttheentrypointthesamedistancebackfromyour
beginning-at-depthpointasthelengthofpipesyou
willneedtoreachthatpoint.Thiswillensurethat
youhaveenoughextraspacesoyouwillnotneedto
over-steeranddamagethepipes.
Thefollowingexampleillustratestheprocessgiven
aninstallationusingthemaximumentrypitchofthe
machine(26%)onlevelground:
•Inserttherst3m(10ft)ofdrillbit/pipeintothe
groundwithnosteering.Theendofthedrillbitwill
be76cm(30inches)deep(Figure28).
g034680
Figure31
1.26%pitch4.185cm(73inches)7.14.7m(45ft)
2.76cm(30inches)5.203cm(80inches)
3.142cm(56inches)6.208cm(82inches)
•Beginsteeringupforthenext3m(10ft),pushing
thepipesinatthemaximumpitchchangeof8%.
Thisresultsinachangeofpitchfrom26%atthe
beginningofthe3m(10ft)to18%attheend
ofthe3m(10ft)foranaveragepitchof22%.
Giventhat,thedrillheadlowersanother66cm(26
inches)andisnow142cm(56inches)deep.
•Continuingsteeringupforthenext3m(10ft)atan
8%pitchchange,yourpitchwillchangefrom18%
to10%foranaveragepitchof14%.Giventhat,
thedrillheadlowersanother43cm(17inches)
andisnow185cm(73inches)deep.
•Continuingsteeringupforthenext3m(10ft)at
an8%pitchchange,yourpitchwillchangefrom
10%to2%foranaveragepitchof6%.Giventhat,
thedrillheadlowersanother18cm(7inches)and
isnow203cm(80inches)deep.
•Levelingthedrillheadfrom2%to0%takesless
than1.5m(5ft)moreforanaldepthof208cm
(82inches).Reachingthisnalpointtook4-1/2
pipes3m(10ft)long.Soforthisexample,your
entrypointshouldbe14.7m(45ft)backfromthe
beginning-at-depthpointofyourinstallation.
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