DOWNHOLE MOTOR WITH SINE-BALL REDUCING GEAR Russian patent published in 1996 - IPC

FIELD: downhole motors. SUBSTANCE: supporting and reducing gear unit 2 is made in form of module. Pack 10 is made in form of successively installed blocks with drive shafts and supports 11 with sine-ball reducing gear 12 with driven shaft and supports 13. Pack 10 is secured by means of subs 8 and 9. Unit 2 is connected with drive shaft and tool by means of threaded sleeves 24 and 43. Drive shaft 19 and driven shaft 35 are connected with shaft 27 of mechanism 12 by means of couplings 32 and 41. Bodies of blocks 11, 12 and 13 are attached to one another by means of threaded joints 33 and 42. Block 11 is secured with the help of nipple 25. EFFECT: higher efficiency. 1 cl, 5 dwg, 1 tbl