All URB2,5À drilling rig mechanisms are actuated by diesel engine via transfer box and gearbox being at 5th (direct) gear. Read more…
Drilling Rig Travel Time AttributesTravel Time Attributes of URB-2,5À-KAMAZ Drilling Rig, engine crankshaft 2000-1500 min-1 .
Power Takeoff Attachment (PTA)
One-speed double-shaft PTA with ratio i=1.6 is installed on the top hatch of vehicle transfer box. Pinion gear No.1 with two toothed rings is installed on the bottom axle of the transfer box. One of toothed rings (z=36) is in constant engagement with top shaft pinion gear (z=35) of the transfer box; the second toothed ring (z = 26) transmits rotation to sliding pinion No.2 (z=42) installed on splines of top shaft No.3. At shaft (3) outer end there is a safety clutch (4) with shear pin (5); cardan shaft No.1 is fastened to its end (Drawing 2).
On shaft No.11 (Drawing 4) arranged on two bearing supports (2 and 17) and on ball-bearings (No. 3 and 16) there is freely-set V-belt pulley wheel (9) of the pump drive; pulley (5) of feed unit drive is set on wedge key.
The gearbox generates three different rotation speeds of rotary table and drawworks drums.
URB 2,5A Drill rig gin
URB 2,5A Drill rig gin is equipped with two trommels placed on one shaft. One
trommel is meant for tool support during drilling, the other trammel is for
round-trip operations, shaft ends rest upon spherical bearings 4
Rotary configuration: standard type with bevel gear, located in oil bath. In case No.4 (Drawing 7) there is a rotary table (2) set on two similar radial-thrust bearings.
Transmission of Bottomhole Feed Unit
The hollow shaft (6) is installed in the ball-bearings. Inner races are separated by bushing (5) and pressed by spring ring (2) set in the recess of the hollow shaft (Drawing 8).
Feed unit receives rotation from transmission via worm reduction gearbox No.1
(Drawing 9). From this worm reduction gearbox the rotation is transmitted
through the tooth-type half-clutch (2) and sprocket (3) to the sprockets of feed
unit chain drive.
Mast is triangular, tubular, welded. At the top of the mast there is a
quadruple crown block, where two rollers are intended for feed unit. Rollers
diameter is 360 mm.
The hydraulic system includes pump No.8 (Drawing 10) installed on the
gearbox, dispenser (1), oil tank (4), hydraulic jack (5) and oil conduits. From
the tank oil moves along conduit (9), sucked in the pump (8) and gets into
dispenser (1) via conduit (7).
The swivel is the intermediate part between rotating drill string and pump
hose. The swivel consists of body No.6 (Drawing 13), spindle (3), oil seal
housing (4), swivel bail (1) and swivel stem (5).
Rig Electrical Equipment
Electrical equipment function is: illuminating job site of rig crew,
signaling to limit tool stroke, unsafe voltage alarm when the mast approaches
power control line of Power Takeoff Attachment (PTA).
The pneumatic system is designed for driving and control of some rig
mechanisms. The pneumatic system is fed from vehicle pneumatic system.
Pipes Uncoupling Mechanism
The mechanism is designed for drill pipes uncoupling during round-trip
(Drawing 17). It consists of base (4) and guide (6) fixed at the top of the
base. The fork (1) is freely mounted in the guide.
Auger Drilling Unit
Auger drilling unit is used to drill group-wells of 4 meters for seismic