中文 | RU | EN
Home >> Products and Services >> Drilling Rig Equipments >> Rotary table

Main features

ZPRTmainly consists of turntable device, welded cast-steel rotary base, input shaftassembly, latch device, master busing device, and top cover and so on.
The turntable is a cast-steel component. Its opening diameter is good to letdrilling tools and casing string go through. In order to rotate the drillstring, there are two machined grooves on the top of the turntable mating tothe hinges on the master-bushing.
The turntable device is seated on the main and subsidiary bearings andsupported through the middle ring of bearings on to the rotary base. The upperpart of middle ring of the combined bearing plays a role as a main bearing andbears the weight transmitted from the drillpipe and casing strings. The lowerpart of middle ring plays a role as an auxiliary bearing and through the lowerseat retainer, installed on the drill floor lower part to bear the run-out fromwell bottom.
A pair of bevel gear halves drives the turntable; and the big gear-rim isinstalled on the turntable.
The pinion gear is installed in one end of shaft; the shaft is supported on twobearings, which are seated in the bearing housing. The flange and duplex chainsprockets are installed on the other end of shaft. They together form an inputshaft assembly.
The lock device is installed on the top of the rotary table for preventing theturntable from being rotating leftwards and rightwards. To lock the turntable,one of left and right pawls is sent by the joystick into one of the 28 groovesof the turntable.
The master bushing is constructed in two halves. The top two hinges are putinto the machined grooves in the turntable.
The master bushing is removed from the turntable by lifting two bails on thebushing.
The big gear and pinion gear are made of alloy steel.
The whole master bushing is made of cast steel.
RT is lubricated properly and sealed reliably.