Study of Radial Vibration Impact on Friction and Torque of Rotary Drill String

Figure 1

(a) Photograph of the experimental device used to test the performance of tools. (b) Schematic of the experimental device: (1) base, (2) main motor, (3) coupling A, (4) torque sensor, (5) coupling B, (6) bearing A and its support, (7) resilient coupling A, (8) inner rod (drill string), (9) outer cylinder (wellbore), (10) test tool, (11) support of outer cylinder, (12) resilient coupling B, (13) bearing B, (14) feed motor, (15) sliding table, (16) connection plate, (17) lifting table, (18) fluid container, and (19) computer.

(a)

(b)