Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through drill string or casing
Patent
1991-08-14
1992-07-14
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through drill string or casing
367 31, 367 75, 364421, G01V 140, H04B 116
Patent
active
051309513
ABSTRACT:
A method of analyzing vibrations transmitted along a structure such as a drill string is disclosed. The detected vibrations include both axial and torsional vibrations generated from the same location, so that the time delay between the two, due to the difference in axial and torsional velocities, can be determined. After deconvolution to take into account the non-ideal frequency response of the structure, such deconvolution preferably retaining the values of the transmission time for each component, one of the time series is shifted by the amount of the time delay, so that the vibrations generated from the same location coincide. A weighted sum of the two representations will provide reinforcement of the desired signal. The method may be used in determining a seismic source signature in prospecting where a drill bit is the source, in analyzing drilling parameters from drill string vibrations, and in stress wave telemetry.
REFERENCES:
patent: 2927300 (1960-03-01), Smith
patent: 3302164 (1967-01-01), Waters et al.
patent: 3378096 (1968-04-01), Cherry
patent: 3705382 (1972-12-01), Quay
patent: 4321981 (1982-03-01), Waters
patent: 4363112 (1982-12-01), Widrow
patent: 4365322 (1982-12-01), Widrow
patent: 4635238 (1987-01-01), Gallagher et al.
patent: 4686657 (1987-08-01), Gellinger et al.
patent: 4715451 (1987-12-01), Bseisu et al.
patent: 4831600 (1989-05-01), Hornby et al.
patent: 4922362 (1990-05-01), Miller et al.
Waters, "Reflection Seismology"; S. Wiley & Sons Publishers, 1981, Tw269.W37, pp. 188-193 and 418-421.
Rector III and Marion, "Extending VSP to 3-D and MWD: Using the drill bit as downhole seismic source", Oil & Gas Journal, pp. 55-58, Jun. 1989.
Rector, et al., "Use of Drill-Bit Energy as a Downhole Seismic Source", 58th International Meeting of SEG, paper DEV 2.7 (1988), pp. 161-164.
DiSiena, et al., "VSP While Drilling: Evaluation of TOMEX", Exploration Technology Report (Atlantic Richfield Company, Fall 1989), pp. 13-20.
Drumheller, "Acoustical Properties of Drill Strings", paper SAND88-0502 (Sandia National Laboratories, Aug. 1988).
Rector III and Marion, "MWD VSP and Checkshot Surveys Using the Drill Bit as a Downhole Energy Source", Offshore Technology Conference (May 1989), paper OTC 6024, pp. 497-506.
Rector III and Weiss, "Real-Time Drill-Bit VSP From an Offshore Platform", 59th Annual Meeting of SEG (1989).
Aarrestad and Kyllingstad, "An Experimental and Theoretical Study of a Coupling Mechanism Between Longitudinal and Torsional Drillstring Vibrations at the Bit", SPE Drilling Engineering, pp. 12-18, Mar. 1988.
Chin, "Formation Evaluation Using Realtime `VS.sup.2 P` Profiling", paper 19446 (Society of Petroleum Engineers, 1989).
Katz, "Drill bit location, guidance by seismic seen feasible", Oil & Gas Journal, pp. 197-200, Jul. 1980.
"Tomex.RTM. Field System" (Western Atlas International).
"Seismic-While-Drilling" (Western Atlas International, 1988).
"Information Required for TOMEX.RTM. Survey" (Western Atlas International).
"Tomex.RTM. Checkshot Survey Seismic-While-Drilling.SM." (Western Atlas International).
"Seismic-While-Drilling.SM. Tomex.RTM. Survey" (Western Atlas International).
Drumheller, "Acoustical Properties of Drillstrings", J. Acoustic Society of America85(3) (Mar. 1989), pp. 1048-1064.
Atlantic Richfield Company
Moskowitz Nelson
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