2.Technical parameters
⑴WQ series multifunction pneumatic drilling Power Slips ( WQ - 275A ) main technical parameters:
        1, air pressure:0.6MPa - 0.9MPa;
        2, effective clamping length:420mm;
        3, carvaka tight height:48mm;
        4, kava release height:260mm;
        5, replacing the different sizes of the slip, slip tooth, can be applied to different sizes of pipe clamping column.
⑵Different sizes of the slip body, Power Slips teeth suitable turntable and clamping the pipe column:

3.The structure and working principle
⑴WQ series multifunction pneumatic drilling kava is mainly by the slip seat, slip, combined cylinder, pneumatic control system, kava teeth, guide rod, the righting ring, mud-scraping disc, connecting rod, the support plate and other components, with drilling platform source as power source.
⑵WQ series multifunction pneumatic drilling slip are installed inside the rotary bushing replacing the original turntable generous W, supporting plate through a connecting rod and the slip body connection, a cylinder piston rod and guide rod and fixed with the supporting plate.
⑶Clamping pipe column, cylinder piston rod and guide rod moves downward to drive the support plate downwardly, slip in the weight and pipe column and the slip tooth friction common effects along the slip seat cone moves downwards, and at the same time tightens inward, automatic clamping pipe column, since the clamping pipe column effect.
⑷Loosen the pipe column, as long as the cylinder piston rod and the guide rod moves upward, push the support plate upward, on the connecting rod and the tube column lifting force, kava kava seat body along the conical surface moves upward and outward opening, loosen the clamping pipe column, at the same time, so that a channel, then the pipe column from kava center freely through. At the same time the mud scraping plate automatic scraping mud adhesion in the pipe column.
⑸In order to ensure the four slip direction of move and synchronization, prevent torsion, the slip seat is designed with a guide channel for guiding.
⑹Pneumatic slip on the cylinder moves all the work table of a pneumatic control valve control.

4.The use of operation
Mounting and dismounting:
⑴pneumatic slip before use, the operator shall be responsible for the confirmation of the clamping tool of the total load should not exceed the pneumatic clip for safety working load, recommended safety working load and0.8 times of the rated load.
⑵ pneumatic slip before use, the operator shall be responsible for the confirmation, shackle pipe column diameter and aerodynamic slips kava body and a dental plate for tube column diameter matched.
⑶pneumatic slip before use, the operator should check the slip body and the connecting rod and the supporting plate connecting pin is reliable, not loose; kava teeth are properly installed ( cusp inclination surface at the lower end ); kava teeth whether excessive wear or broken teeth. If appear the situation should be handled in time, again installation or replacement.
⑷pneumatic clip for mounting to the turntable, should be connected to a gas pipeline, a lifting cylinder on the activity of 3~ 5 times, to ensure the flexible lifting, no leakage, and the piston rod and the guide rod filling. Then, will slip up in a release position.
⑸install pneumatic card kilowatt hour, using special suspension hook hoist pneumatic slip to the wellhead, removal of the card tile body connecting block, open and generous w push and hold the tube column, then shut generous W, then put into the rotary bushing inside. When wellhead skewed more serious, must be pneumatic slip rotary pin is rotated to the turntable driving pin hole.
⑹after tripping operation, the aerodynamic slips out of the rotary disc, the first will slip up in the open position, rotation pneumatic slip rotary pin from the turntable drive pin bore, with special suspension hook hanging air operated slips.
The use of operation:
⑴hoisting operation, the first in the lift pipe column buckle elevator, lift pipe column in front, the driller control pneumatic valve, so that the lower end of the cylinder inlet, then lifting the pipe column, at this time, the cylinder lift and the drill rod and the slip body under the action of friction, slip along the slip seat tapered upward and outwardly splayed, loosen the pipe column, at the same time, so that a channel, allowing the pipe column from kava center freely through. When lifting the pipe column under step ( for joint shackle joint ) beyond the kava support plate ( in150mm ), the reverse control pneumatic slip valve, so that the upper part of the cylinder inlet, at this time, in the cylinder under the action of tension, slip down and pipe column passage centered and stuck pipe column. This can be unloading operation.
⑵drilling operation, tube column joint well buckled, driller's manipulation of kava pneumatic valve, so that the lower end of the cylinder inlet, then lifting the drill string, then, in the cylinder under the action of the drill rod and the lifting and the slip body under the function of friction, slip along the slip seat upward and outward open cone at the same time, loosen the pipe column, so that a channel, can smoothly transferring pipe column. The present pipe column end close to the elevator slip support plate having ( control in 100mm ), the reverse control pneumatic slip valve, so that the upper part of the cylinder inlet, at this time, in the cylinder under the action of tension, slip down and pipe column passage centered and stuck pipe column. You can then remove the elevators, were a pipe column operation.
⑶drilling operations, when the well head skew more serious, each to a tube column joints should slow down the running speed, to prevent the pipe column joint collision slip, causing damage and failure.
⑷when the tripping process need to rotate the turntable, need clamping pipe column, and then the gas pipeline quick joint pull off. Rotating turntable, fast joints must be as is inserted, cannot reverse.
⑸elevator ascending or descending pipe column process, when close to the support plate, should slow down the speed, to prevent the collision or smashingBad pneumatic slip.
⑹pneumatic slip in the replacement tooth plate, should one-time replacing all the dental plate.

5.Fault exclusion

Pneumatic slip in the using process of the common failure and troubleshooting table: