Farr KT5500, Техническое руководство

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KT5500 5-
1
/
2
” T
ong
& CLInCHER® B
aCKup
S
ECTIon
C
onTEnTS
2.17
T
ECHnICaL
M
anuaL
S
ETup
& o
pERaTIon
Suspension & Restraint (continued):
McCoy Drilling & Completions recommends using dual backup (snub) lines of sufficient strength to withstand the force imparted
by the maximum rated torque of the tong and backup assembly in use. The snub lines will arrest uncontrolled movement of the
tong and backup in the event slipping of the backup jaws. Calculate the force on the snub lines by dividing the maximum torque
of the tong by the tong’s torque arm (expressed in feet). For example, a 25,000 lbs.-ft. tong with a 32 inch (2.667 ft.) torque
arm will generate 9375 lbs. of force against the snub line. Select your snub lines based upon the total force and the margins of
safety dictated by the policies of your company and by established engineering practices. Ultimately, calculating the force on
the snub line and selection of the snub line is the complete responsibility of the customer.
Snub lines must be securely connected to the rear of the tong and backup assembly, and tied off to a suitable anchor.
MCCOY DRILLING & COMPLETIONS ACCEPTS NO RESPONSIBILITY FOR DESIGNING AND
SELECTING AN ADEQUATE SUSPENSION AND RESTRAINT SYSTEM FOR YOUR DRILLING
EQUIPMENT
ALL SELECTED FASTENERS, SHACKLES, CLAMPS, ETC. USED FOR CONSTRUCTING THE SUS-
PENSION AND SNUB LINES MUST BE RATED FOR THE CALCULATED FORCES.
2. Tong Leveling
The tong must be leveled side-to-side and front-to-rear before placing into service. The following guidelines wil assist you when
leveling your tong.
i.
Place a level axially (side to side) across the tong, ensuring that it is parallel with the surface of the tong. Use a thin
wrench on the flat of the adjusting helix to rotate the helix, forcing the lift link to move towards the outer supports of the
sling. The 1” jam nut on the pin may have to be slightly loosened to allow the helix to rotate. Adjust the helix until the level
shows that the tong is level side-to-side - retighten the nut if necessary