Farr HD8625 - Illustration 2.H.2: Backing Pin Set To Make-Up Position; Illustration 2.H.3: Lift Cylinder Control - Raise

Technical Manual
hD8625 8-
5
/
8
” 35K Tong
2.19
seTup & operaTion
Making A Connection (Continued)
IllustratIon 2.H.2: BaCkIng PIn set to “make-uP” PosItIon
c) Ensuretheloadcellandsnubline(s)areproperlyconfiguredformakingupconnections.A“snubline”isalengthofwirerope
thatconnectstherearofthetongbodytoasturdyanchoronthedrillfloor(seeSection2.F.1).Thesnublinepreventsthetong
bodyfromspinningintheoppositedirectionofthecageplatewhentorquebeginstobuildinthejoint.FarrCanadaCorp.rec-
ommendsusingtwosnublineswhenrunningtheequipmenttoeliminateuncontrolledmovementineitherrotationaldirection.
Thesnubline(s)mustberatedfortheappliedtorquepluswhateversafetymarginsstatedbyyourownoperatingpolicies.The
snublineconnectionpointonthedrillfloormustbesturdyenoughtoabsorballappliedforceswhenmakingupthejoints.When
makingupjointstheloadcellmustbeconnectedtothedriller’ssideofthetong,whichistheleftsideofthetongasseenfrom
therear.Foraccuratetorquemeasurementthesnublinebetweenthetongbodyandtheanchormustbeperpendiculartothe
vertical,andperpendiculartothecentre-lineofthetong.
d) Actuatetheliftcylindercontrolvalvetolifttheassemblyfromthedrillfloor.Pullingthevalvetowardtheoperatorwillretractthe
liftcylindertoraisetheassembly(seeIllustration2.H.3below).Notethatrigpersonnelarerequiredtostabilizethetongand
backupasitisbeingliftedsoitdoesnotswingandcollidewithotherrigequipment.
RIG PERSONNEL MUST STABILIZE THE TONG AS IT IS LIFTED FROM THE DRILL FLOOR
IllustratIon 2.H.3: lIft CylInDer Control - raIse