Acoustic data transmission method
This patent describes a method for transmitting time line data through a drillstring having drill pipe sections connected end-to-end by joints from a first location below the surface of the earth to a second location at or near the surface of the earth, the length and cross-sectional area of the drill pipe sections being different from the length and cross-sectional area of the joints. It comprises generating acoustic data signals having a single frequency content in at least one passband of the drillstring; transmitting the data signals through the drillstring from either the first location to the second location or from the second location to the first location during a time period prior to the onset of reflective interference caused by the data signals reflecting from along the length of the drillstring, the time period being equal to or less than the time for the data signals to travel three lengths of the drillstring; stopping the transmission of data signals at the onset of the reflective interference and allowing the acoustic signals to substantially attenuate; and detecting the data signals at the respective first or second location.
- Assignee:
- Teleco Oilfield Services Inc., Meriden, CT (United States)
- Patent Number(s):
- US 5050132; A
- Application Number:
- PPN: US 7-610433
- OSTI ID:
- 5801284
- Resource Relation:
- Patent File Date: 7 Nov 1990
- Country of Publication:
- United States
- Language:
- English
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