Well perforation inspection
A method of determining the location of a perforation into an earth formation from a wellbore is described comprising the steps of: placing means in said wellbore including means for transmitting an acoustic signal and receiving means for receiving an acoustic signal resulting from the transmitted signal; moving said means through said wellbore while transmitting acoustic signals of a predetermined range of selected frequencies into said wellbore and receiving reflected acoustic signals from said wellbore resulting from said transmitted acoustic signals; and comparing the intensities of the received acoustic signals at said receiving means with the frequencies of said received acoustic signals to determine when a received acoustic signal of a resonant frequency of one said transmitted acoustic signals has been detected by said receiving means as an indication of the location of said perforation with respect to at least one of said means for transmitting and said receiving means.
- Assignee:
- Atlantic Richfield Co., Los Angles, CA (United States)
- Patent Number(s):
- US 5218573; A
- Application Number:
- PPN: US 7-761110
- OSTI ID:
- 6453820
- Resource Relation:
- Patent File Date: 17 Sep 1991
- Country of Publication:
- United States
- Language:
- English
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