Apparatus and method for compensating for clock drift in...

Details Apparatus and method for compensating for clock drift in... Apparatus and method for compensating for clock drift in...

2007-08-07

2007-08-07

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Regenerating or restoring rectangular or pulse waveform

C327S162000, C327S378000

Reexamination Certificate

active

10878147

ABSTRACT:
A precise downhole clock that compensates for drift includes a prescaler configured to receive electrical pulses from an oscillator. The prescaler is configured to output a series of clock pulses. The prescaler outputs each clock pulse after counting a preloaded number of electrical pulses from the oscillator. The prescaler is operably connected to a compensator module for adjusting the number loaded into the prescaler. By adjusting the number that is loaded into the prescaler, the timing may be advanced or retarded to more accurately synchronize the clock pulses with a reference time source. The compensator module is controlled by a counter-based trigger module configured to trigger the compensator module to load a value into the prescaler. Finally, a time-base logic module is configured to calculate the drift of the downhole clock by comparing the time of the downhole clock with a reference time source.

REFERENCES:
patent: 2414719 (1947-01-01), Cloud
patent: 3505478 (1970-04-01), Kaneko
patent: 3518608 (1970-06-01), Papadopoulos
patent: 4055814 (1977-10-01), Abraham
patent: 4124820 (1978-11-01), Arnstein
patent: 4165490 (1979-08-01), Howe, Jr. et al.
patent: 4386323 (1983-05-01), Jansen
patent: 4560939 (1985-12-01), DeKarske et al.
patent: 4602375 (1986-07-01), Inukai
patent: 4739325 (1988-04-01), MacLeod
patent: 4788544 (1988-11-01), Howard
patent: 4868514 (1989-09-01), Azevedo et al.
patent: 5604468 (1997-02-01), Gillig
patent: 5834987 (1998-11-01), Dent
patent: 5856766 (1999-01-01), Gillig et al.
patent: 5859881 (1999-01-01), Ferraiolo et al.
patent: 6012015 (2000-01-01), Tubel
patent: 6130925 (2000-10-01), Ichimaru et al.
patent: 6236278 (2001-05-01), Olgaard
patent: 6249235 (2001-06-01), Iwasaki
patent: 6252518 (2001-06-01), Laborde
patent: 6308049 (2001-10-01), Bellaouar et al.
patent: 6359950 (2002-03-01), Gossmann et al.
patent: 6392317 (2002-05-01), Hall et al.
patent: 6504498 (2003-01-01), O'Brien
patent: 6515553 (2003-02-01), Filiol et al.
patent: 6556087 (2003-04-01), Ichimaru
patent: 6600378 (2003-07-01), Patana
patent: 6639475 (2003-10-01), Ichimaru
patent: 6661267 (2003-12-01), Walker et al.
patent: 6670880 (2003-12-01), Hall et al.
patent: 6688396 (2004-02-01), Floerke et al.
patent: 6710951 (2004-03-01), Cloke
patent: 6711230 (2004-03-01), Nicholls et al.
patent: 6717501 (2004-04-01), Hall et al.
patent: 6799632 (2004-10-01), Hall et al.
patent: 6821147 (2004-11-01), Hall et al.
patent: 6830467 (2004-12-01), Hall et al.
patent: 6844498 (2005-01-01), Hall et al.
patent: 6844836 (2005-01-01), Lee
patent: 6866306 (2005-03-01), Boyle et al.
patent: 6888473 (2005-05-01), Hall et al.
patent: 6913093 (2005-07-01), Hall et al.
patent: 6929493 (2005-08-01), Hall et al.
patent: 6945802 (2005-09-01), Hall et al.
patent: 2004/0039468 (2004-02-01), Lilly et al.
patent: 2004/0104797 (2004-06-01), Hall et al.
patent: 2004/0113608 (2004-06-01), Hall et al.
patent: 2004/0145492 (2004-07-01), Hall et al.
patent: 2004/0150632 (2004-08-01), Hall et al.
patent: 2004/0164833 (2004-08-01), Hall et al.
patent: 2004/0164838 (2004-08-01), Hall et al.
patent: 2004/0216847 (2004-11-01), Hall et al.
patent: 2004/0244916 (2004-12-01), Hall et al.
patent: 2004/0244964 (2004-12-01), Hall et al.
patent: 2004/0246142 (2004-12-01), Hall et al.
patent: 2005/0001735 (2005-01-01), Hall et al.
patent: 2005/0001736 (2005-01-01), Hall et al.
patent: 2005/0001738 (2005-01-01), Hall et al.
patent: 2005/0035874 (2005-02-01), Hall et al.
patent: 2005/0035875 (2005-02-01), Hall et al.
patent: 2005/0035876 (2005-02-01), Hall et al.
patent: 2005/0036507 (2005-02-01), Hall et al.
patent: 2005/0039912 (2005-02-01), Hall et al.
patent: 2005/0045339 (2005-03-01), Hall et al.
patent: 2005/0046588 (2005-03-01), Hall et al.
patent: 2005/0048590 (2005-03-01), Hall et al.
patent: 2005/0067159 (2005-03-01), Hall et al.
patent: 2005/0070144 (2005-03-01), Hall et al.
patent: 2005/0082092 (2005-04-01), Hall et al.
patent: 2005/0092499 (2005-05-01), Hall et al.
patent: 2005/0093296 (2005-05-01), Hall et al.
patent: 2005/0095827 (2005-05-01), Hall et al.
patent: 2005/0115717 (2005-06-01), Hall et al.
patent: 2005/0145406 (2005-07-01), Hall et al.
patent: 2005/0150853 (2005-07-01), Hall et al.
patent: 2005/0161216 (2005-07-01), Hall et al.
patent: 2005/0173128 (2005-08-01), Hall et al.
patent: 2005/0212530 (2005-09-01), Hall et al.
patent: 2005/0236160 (2005-10-01), Hall et al.
PCT/US03/18475, Published Dec. 4, 2003, Applicant Beker Hughes; International Search Report “Documents Considered to Be Relevant”.

Affiliated with

Also associated with

Rating

Apparatus and method for compensating for clock drift in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for compensating for clock drift in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for compensating for clock drift in... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3865064