Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent
1997-01-06
1998-12-15
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through well fluids
3408543, 3408544, G01V 140
Patent
active
058503692
ABSTRACT:
A transducer is described especially for use in providing acoustic transmission in a borehole. The transducer includes a multiple number of magnetic circuit gaps and electrical windings that have been found to provide the power necessary for acoustic operation in a borehole while still meeting the stringent dimensional criteria necessitated by boreholes. Various embodiments conforming to the design are described. Moreover, the invention includes transition and reflector sections, as well as a directional coupler and resonator arrangement particularly adapted for borehole acoustic communication.
An acoustic communication system is described especially designed for use in providing acoustic transmission of information in a borehole. The communication system comprises a surface transceiver and at least one downhole transceiver. The surface transceiver operates in conjunction with a host computer that sends commands to the downhole transceiver. Subsequently, the downhole transceiver transmits encoded data from subsurface, borehole sensors to the surface transceiver. The preferred embodiment uses Minimum Shift Keying (MSK) modulation for both transmitting commands to the downhole unit and for transmitting data to the surface transceiver. To facilitate operation of a coherent communication system in the inhospitable environment of a borehole, the acoustic channel is characterized to enable the system to choose the best possible frequency and bandwidth for communication transmission. Additionally, the system achieves synchronous operation by transmitting synchronization signals between the downhole transceiver and the surface transceiver prior to the units exchanging commands and data.
REFERENCES:
patent: 2354887 (1944-08-01), Silverman et al.
patent: 2388141 (1945-10-01), Harrington
patent: 2411696 (1946-11-01), Silverman et al.
patent: 3150346 (1964-09-01), Polly et al.
patent: 3233674 (1966-02-01), Leutwyler
patent: 3305825 (1967-02-01), Godbey
patent: 3496533 (1970-02-01), Semmelink
patent: 3665955 (1972-05-01), Conner, Sr.
patent: 3688029 (1972-08-01), Bartoe, Jr. et al.
patent: 3737845 (1973-06-01), Maroney et al.
patent: 3750096 (1973-07-01), Koomey et al.
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3800277 (1974-03-01), Patton et al.
patent: 3930220 (1975-12-01), Shawhan
patent: 3949354 (1976-04-01), Claycomb
patent: 3958217 (1976-05-01), Spinnier
patent: 3961308 (1976-06-01), Parker
patent: 3964556 (1976-06-01), Gearhart et al.
patent: 3991611 (1976-11-01), Marshall, III et al.
patent: 4038632 (1977-07-01), Parker
patent: 4057781 (1977-11-01), Scherbatskoy
patent: 4073341 (1978-02-01), Parker
patent: 4129184 (1978-12-01), Parker
patent: 4147222 (1979-04-01), Patten et al.
patent: 4166979 (1979-09-01), Waggener
patent: 4181014 (1980-01-01), Zuvela et al.
patent: 4215425 (1980-07-01), Waggener
patent: 4246964 (1981-01-01), Brandell
patent: 4254481 (1981-03-01), Smither et al.
patent: 4273212 (1981-06-01), Dorr et al.
patent: 4293936 (1981-10-01), Cox et al.
patent: 4293937 (1981-10-01), Sharp et al.
patent: 4298970 (1981-11-01), Shawhan et al.
patent: 4314365 (1982-02-01), Petersen et al.
patent: 4320473 (1982-03-01), Smither et al.
patent: 4373582 (1983-02-01), Bednar et al.
patent: 4562559 (1985-12-01), Sharp et al.
patent: 4578675 (1986-03-01), MacLeod
patent: 4669068 (1987-05-01), Klatt
patent: 4689775 (1987-08-01), Scherbatskoy
patent: 4733233 (1988-03-01), Grosso et al.
patent: 4787093 (1988-11-01), Rorden
patent: 4839644 (1989-06-01), Safinya et al.
patent: 4862991 (1989-09-01), Hoyle et al.
patent: 4908804 (1990-03-01), Rorden
patent: 4971160 (1990-11-01), Upchurch
patent: 5055837 (1991-10-01), Abdallah et al.
patent: 5065825 (1991-11-01), Bardin et al.
patent: 5067114 (1991-11-01), Rorden et al.
patent: 5113379 (1992-05-01), Scherbatskoy
patent: 5124953 (1992-06-01), Grosso
patent: 5148408 (1992-09-01), Matthews
patent: 5163029 (1992-11-01), Bryant et al.
patent: 5191326 (1993-03-01), Montgomery
patent: 5197041 (1993-03-01), Balogh
patent: 5222048 (1993-06-01), Grosso et al.
patent: 5274606 (1993-12-01), Drumheller et al.
patent: 5275040 (1994-01-01), Codazzi
patent: 5283768 (1994-02-01), Rorden
patent: 5592438 (1997-01-01), Rorden et al.
Gibbons Frank Lindsay
Leggett, III James V.
Owens Steven C.
Patel Ashok
Rorden Louis H.
Baker Hughes Incorporated
Hunn Melvin A.
Lobo Ian J.
LandOfFree
Method and apparatus for communicating data in a wellbore and fo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for communicating data in a wellbore and fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for communicating data in a wellbore and fo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1462834