Claims
- 1. A method of increasing the rate of penetration when drilling a subterranean well through formations using a drill string including a drill bit, comprising:generating an acoustic signal downhole along a drill string and propagating the acoustic signal outward into a formation; inducing an electromagnetic signal in the formation in response to the acoustic signal; receiving the induced electromagnetic signal downhole along the drill string; transmitting a downhole signal functionally related to the electromagnetic signal to the surface; processing said downhole signal to generate processed data; and altering one or more drilling parameters in response to the processed data.
- 2. The method as defined in claim 1, wherein processing said downhole signal includes calculating resistivity of the formation.
- 3. The method as defined in claim 1, further comprising:comparing the processed data to known formation characteristics.
- 4. The method as defined in claim 1, further comprising:displaying drilling parameters along with the characteristics of the processed data.
- 5. The method as defined in claim 1, wherein altering the one or more drilling parameters includes modifying the bit selection.
- 6. The method as defined in claim 1, wherein altering the one or more drilling parameters includes changing weight on bit while drilling.
- 7. The method as defined in claim 1, wherein altering the one or more drilling parameters includes changing rotary speed of the drill bit while drilling.
- 8. A method of increasing the rate of penetration when drilling a subterranean well through formations using a drill string including a drill bit, comprising:generating an acoustic signal downhole along a drill string and propagating the acoustic signal outward into a formation; and inducing an electromagnetic signal in the formation in response to the acoustic signal; receiving the induced electromagnetic signal downhole along the drill string; transmitting a downhole signal functionally related to the electromagnetic signal to the surface; processing said downhole signal to generate processed data indicative of at least one of pore preserve and resistivity of the formation; and altering one or more drilling parameters in response to the processed data.
- 9. The method as defined in claim 8, further comprising:comparing the processed data to known formation characteristics.
- 10. The method as defined in claim 8, further comprising:displaying drilling parameters along with the characteristics of the processed data.
- 11. The method as defined in claim 8, wherein altering the one or more drilling parameters includes modifying the bit selection.
- 12. The method as defined in claim 1, wherein altering the one or more drilling parameters includes at least one of changing weight on drill bit while drilling and changing rotary speed of the drill bit while drilling.
- 13. A method of increasing the rate of penetration when drilling a subterranean well through formations using a drill string including a drill bit, comprising:generating an acoustic signal downhole along a drill string and propagating the acoustic signal outward into a formation; inducing an electromagnetic signal in the formation in response to the acoustic signal; receiving the induced electromagnetic signal downhole along the drill string; transmitting a downhole signal functionally related to the electromagnetic signal to the surface; processing said downhole signal to generate processed data; and altering at least one of bit selection, weight on bit while drilling, and rotating speed while drilling in response to the processed data.
- 14. The method as defined in claim 13, wherein processing said downhole signal includes calculating resistivity of the formation.
- 15. The method as defined in claim 13, further comprising:comparing the processed data to known formation characteristics.
- 16. The method as defined in claim 13, further comprising:displaying drilling parameters along with the characteristics of the processed data.
Parent Case Info
This application is a continuation of Ser. No. 09/537,455 filed Mar. 27, 2000, now U.S. Pat. No. 6,480,118.
US Referenced Citations (7)
Number |
Name |
Date |
Kind |
6023443 |
Dubinsky et al. |
Feb 2000 |
A |
6206108 |
MacDonald et al. |
Mar 2001 |
B1 |
6230822 |
Sullivan et al. |
May 2001 |
B1 |
6236620 |
Schultz et al. |
May 2001 |
B1 |
6490527 |
Utt |
Dec 2002 |
B1 |
6581010 |
Dubinsky et al. |
Jun 2003 |
B2 |
6648083 |
Evans et al. |
Nov 2003 |
B2 |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/537445 |
Mar 2000 |
US |
Child |
10/264731 |
|
US |