Coring drill tool driving structure

A driving structure for a coring drill tool, comprising:

• a driving motor (7), an outer cylinder (23) and a coring drill tool (8),
• wherein:
• the driving motor (7) comprises an outer rotor (73) and an inner stator (75), and an inner wall of the outer rotor (73) and an outer wall of the inner stator are provided with ribs (77) mutually matched,
• the outer rotor (73) and the inner stator (75) are in clearance fit, and a clearance between the outer rotor (73) and the inner stator (75) is a driving fluid channel (74),
• a length of the outer rotor (73) is shorter than the length of the inner stator (75),
• the outer rotor (73) is located between front and rear ends of the inner stator (75), and
• connected to the outer cylinder (23), while a front end of the outer cylinder (23) is connected to the coring drill tool (8),
• a rear end of the inner stator (75) is connected to a coupling (76),
• the outer cylinder (23) is provided with a driving fluid outlet (72) disposed in front of the outer rotor (73),
• the inner stator (75) has a hollow structure, and a central rod (14) passes through an inner cavity of the inner stator (75) and the coupling (76), and is connected to a core barrel (6),
• a core tube (6) is in front of the inner stator (75),
• a fluid channel activation module is also comprised is disposed behind the inner stator (75), the fluid channel activation module comprises a lock body (11), a locking rod (12), and a start shear pin (13),
• the locking rod (12) is in the lock body (11), and the locking rod (12) and the lock body (11) are connected by the start shear pin (13),
• the central rod (14) is in the locking rod (12), while a sealing section A (112) of the lock body (11) and a sealing section B (123) of the locking rod (12) are in a sealing fit,
• the sealing section B (123) is in a sealing fit with the central rod (14),
• a fluid channel A (41) is disposed between the central rod (14) and the locking rod (12), and the locking rod (12) has a connecting fluid channel A (41) and an outflow hole A (1221) on an outer wall of the locking rod (12),
• the outflow hole A (1221) is disposed behind the sealing section B (123),
• a fluid channel B (42) is disposed between the lock body (11) and the locking rod (12), and the fluid channel B (42) is in front of the sealing section A (112),
• an outlet of the outflow hole A (1221) is at the sealing section A (112), and the front end of the fluid channel A (41) is sealed,
• the front of the lock body (11) is connected to the inner stator (75), and the front of the fluid channel B (42) is connected to the driving fluid channel (74).