Westco 16-25, Руководство по эксплуатации продукта, Страница: 11 / 49

Hanging the Tong
The tong is transported to the well site and hung into position as illustrated in Figure 2-3
and as follows:
Connect cable to the tong bail. The tong should be suspended by a steel cable from a point
high enough on the derrick to assure easy handling and maneuverability. The hang point
should be positioned as near the center of the rotary gear as possible (allowing for hanger
offset from tong opening centerline) without interfering with movement of the casing handling
tools. The line should anchor securely to the rig frame. If a spring hanger is used, extend the line
over a pulley and down to the spring hanger. The tong line should position the tong at the
anticipated average height of the joint during use. This will allow the tong to follow the joint
during make-up or breakout.
WARNING: To prevent bodily injury this steel cable must be rated for 4,000 lbs
(1814.4 kg) minimum working load.
If no spring hanger is used, use two pulleys to keep the counterbalance, which weighs
approximately 1,200 pounds (544.3 kg), out of the operating area.
The tong must be as near level as practicable for proper operation. When the tong is being
leveled, the jaws should have been inserted and the doors closed. For fore and aft leveling,
adjust the bolts at the hanger joint on each side of the case, assuring both bolts are in contact
with the hanger strut. For side-to-side leveling, move the clevis in the notched insert at the top
of the hanger to the required position.
Connect the backup line to the torque gauge to restrain tong rotation and to provide torque
readings for operations.
WARNING: To prevent serious bodily injury secure tong to derrick with a backup line
rated to 25,000 pounds (11340 kg) minimum working load.
If no torque gauge is used, connect the line directly to the backup line bracket.
Secure the other end of the backup line to a solid part of the rig to form a 90 degree angle
with the tong centerline. Failure to maintain the 90 degree angle will result in torque
measurement errors .
Connecting the Hydraulic Lines
Hook up the pressure hose to the one-inch fitting on the tong by forcing the connectors
together while turning the fitting. Hook up the return hose from the power unit to the 1-1/4
inch connector on the tong in the same manner.
WARNING: Be sure connectors are completely tight.
If a lift cylinder is used, connect the hose from the lift cylinder to the connector provided
on the tong.
Start the power unit and allow hydraulic fluid to circulate through the tong until fluid
reaches operating temperature.
NOTE: This period will vary according to the ambient temperature. In severe weather
conditions you may need to operate the system for several minutes before using
the tong. In warm climates a brief warm-up period is adequate.
While the system warms up, check the connections to be sure that no leaks occur.
Retighten connections if leaking.
NOTE: Refer to Figure 4-3 in "Maintenance" for recommended hydraulic fluid.
WARNING: When replacing hydraulic hoses, piping and fittings, be sure
replacement components are rated at no less than 3,000 psi (206.8 bar)
working pressure and 10,000 psi (689.5 bar) burst pressure.