Smart-ultrasonic/sonic driller/corer

• US 20040007387A1
• Filed: 10/17/2002
• Published: 01/15/2004
• Est. Priority Date: 05/03/2000
• Status: Active Grant

• Current Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Original Assignee: Benjamin Dolgin, Dharmendra Pal, Jason Kroh, Ron Krahe, Stewart Sherrit, Thomas M. Peterson, Yoseph Bar-Cohen
• Inventors: Pal, Dharmendra, Sherrit, Stewart, Krahe, Ron, Bar-Cohen, Yoseph, Dolgin, Benjamin, Kroh, Jason, Peterson, Thomas M.
• Granted Patent: US 6,863,136 B2
• Time in Patent Office: Days
• US Class Current: 175/50
• CPC Class Codes: B64G 4/00 Tools specially adapted for use in space
• CPC Class Codes: E21B 44/00 Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
• CPC Class Codes: E21B 47/00 Survey of boreholes or wells monitoring pressure or flow of drilling fluid E21B21/08
• CPC Class Codes: E21B 49/00 Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
• CPC Class Codes: E21B 7/24 Drilling using vibrating or oscillating means, e.g. out-of-balance masses percussion drilling E21B1/00

Abstract

Apparatus for probing, sensing, testing penetrating and sampling a medium generally includes an actuator (12) for generating vibrations at ultrasonic frequencies and a horn (14) coupled to the actuator (12) for amplifying the actuator vibrations along with a non-rotating coring and drilling bit (16) for penetrating the medium. A bit (16) includes a drill stem (20) attached to the horn (14) and a bore (26) extends through the bit (16), horn (14) and actuator (12) for withdrawal of samples. A free mass (36) is disposed between the horn (14) and the drill stem (20) for oscillating therebetween in response to the actuator vibration for causing migration of medium debris around and through the actuator bore for effectively self-cleaning of the bit (16). The hammering action of the free mass (36) is used for penetration of the medium and for analysis of the medium though the use of spaced apart accelerometers (92 and 94).

Claims

1. Apparatus for probing testing and penetrating a medium, said apparatus comprising:

an actuator for generating vibrations at ultrasonic frequencies;

a horn coupled to said actuator for amplifying the actuator vibrations;

a non-rotating coring and drilling bit for penetrating the medium, the bit having a drill stem attached to said horn; and

a free mass, disposed between said horn and said drill stem for oscillating therebetween, in response to actuator vibration, for causing migration of medium debris around the bit for effecting self-cleaning of the bit.

2. The apparatus according to claim 1 wherein said horn includes a central bore therethrough, the bit includes a bore therethrough communicating with the horn base and actuator and free mass vibrations cause migration of medium debris through the bit and horn bores.

3. The apparatus according to claim 2 further comprising a conduit communicating with the horn bore for removing debris, including tailings, dust, gases, liquids, vapors and volatiles, from the apparatus through the actuator and bit bore.

4. The apparatus according to claim 2 further comprising sensors disposed at a bit tip for measuring electrical properties of the medium.

5. The apparatus according to claim 4 further comprising sensors disposed along the bit for measuring electrical properties of the medium debris.

6. The apparatus according to claim 2 wherein said actuator comprises a metal-piezoceramic-metal sandwich secured by a bolt in order to maintain compression on the piezoceramic and dissipate heat.

7. The apparatus according to claim 6 wherein the sandwich comprises at least one driver ceramic for generating the vibrations and at least one sensor ceramic measuring a force of impact of the bit against the medium in order to determine mechanical properties of the medium.

8. The apparatus according to claim 7 wherein said bolt includes a bore therethrough, the bolt bore communicating with the horn bore and the bit bore for enabling medium cores to be extended therethrough.

9. The apparatus according to claim 8 further comprising sensors disposed at a bit tip for measuring electrical, mechanical and biochemical properties of the medium.

10. The apparatus according to claim 9 further comprising sensors disposed along the bit for measuring electrical properties of the medium debris and cores.

11. The apparatus according to claim 10 further comprising at least one accelerometer for positing on the medium remote from the bit in order to sense electric waves imparted to the medium by the oscillating free mass.

12. The apparatus according to claim 11 further comprises a control system, responsive to the accelerometer, bit sensors and sensor ceramic for driving the actuator and recording the electrical and mechanical properties of the medium before, during and after penetration of the bit into the medium.

13. Apparatus for probing, testing and penetrating a medium, said apparatus comprising:

an actuator for generating vibrations at ultrasonic frequencies;

a horn coupled to said actuator for amplifying the actuator vibrations, said horn having a central bore therethrough;

a non-rotating coring and drilling bit for penetrating the medium, the bit having a drill stem attached to said horn and a bore therethrough communicating with the horn bore;

a free mass, disposed between said horn and said drill stem, for oscillating therebetween in response to actuator vibrations and causing a sonic hammering effect on the bit; and

at least one accelerometer for positioning on the medium remote from the bit in order to sense elastic waves imparted to the medium by the hammering effect.

14. The apparatus according to claim 13 further comprising sensors disposed along the bit for measuring electrical mechanical and biochemical properties of the medium.

15. The apparatus according to claim 13 wherein said actuator comprises a metal-piezoceramic-metal sandwich secured by a bolt in order to maintain compression on the piezoceramic and to dissipate heat.

16. The apparatus according to claim 15 wherein the piezoceramic comprises at least one driver ceramic for generating the vibrations and at least one sensor ceramic for measuring a force of impact of the bit against the medium in order to determine mechanical properties of the medium.

17. The apparatus according to claim 13 further comprising a conduit communicating with the horn bore for enabling suction to be applied in order to remove medium debris, indicating tailings, dust, gases, liquids, vapors and valuables, from the apparatus.

18. The apparatus according to claim 17 further comprising sensor disposed at a bit tip for measuring electrical, mechanical and biochemical properties of the mediums.

19. The apparatus according to claim 18 further comprises sensors disposed along the bit for measuring electrical properties of the medium debris.

20. The apparatus according to claim 19 wherein said bolt includes a bore therethrough, the bolt bore communicating with the horn bore and the bit bore for enabling medium cores to be extracted therethrough.

21. The apparatus according to claim 20 further comprising sensor disposed along the bit for measuring electrical properties of the medium cores.

22. The apparatus according to claim 21 further comprising sensors disposed at an end of the bit for measuring electrical mechanical and biochemical properties of the medium.

23. The apparatus according to claim 22 further comprises sensors disposed along the bit for measuring electrical properties of the medium debris.