Model KT14000 power casing tong maintenance and operation manual
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
4
3.3
Operation
3.3.1
Requirements for operators
(1)The operator should know the tong structure and the properties.
(2)Be familiar with the operation of hydraulic reversing handle on power tongs:
When manual reversing valve of control master tong is pushed, large gear on master tong turns in the
making-up tong direction; when manual reversing valve of control master tong is pulled, large gear on
master tong turns in the braking-out tong direction;
When manual reversing valve of control back tong is pushed, back tong is clamped; when manual
reversing valve of control back tong is pulled, back tong is released.
(3)Be familiar with the operation of shifting handle (various gears of shifting handle are shown in Fig.
below).
(4)Adjustment of safety door clearance
The clearance between safety door buckle and latch seat on the shell may be regulated through
adjusting
turning angle of eccentric shaft for minimum clearance for normal opening of safety door.
(5)Learn operation sequence and safety requirements;
(6)Be familiar with the instrument operation.
3.3.2
Operation of power tong
(1)Learn specifications of jaw plates and Die: each specification jaw plate of master tong and backup tong
have two jaw plates, and the two are same and may be installed on the left and right. During installing
jaw plate, it is necessary to check whether Die is worn or clean. It is necessary to tighten fixation bolts
of Die.
(2)Install jaw plate and Die with corresponding size for the string.
(3) Put shifting handle of the upper and lower shifting device on the neutral position;
(4)Start hydraulic power station;
(5)When hydraulic reversing handle is pushed or pulled, rotation noise of hydraulic motor should be heard
and open gear of tong head should not rotate;
(6)When shifting handle is put on any gear and hydraulic reversing
Note:
shifting should be carried out when hydraulic motor stops the rotation.
