Barry,
I tried this from Sql Developer 4.1.1 goto Tools->perference->Database->Utilities->Export->Comma Seperate value(CSV) and set "Left Enclosure" , "Right Enclosure" to None and uncheck the "Right enclosure in data is doubled"
and tried running this query (select /*csv*/ * from dept) from sql worksheet
Here is the output, i still see double quotes around Text
"DEPTNO","DNAME","LOC"
10,"ACCOUNTING","NEW YORK"
20,"RESEARCH","DALLAS"
30,"SALES","CHICAGO"
40,"OPERATIONS","BOSTON"
Here is one of the custom utility that can unload the data
https://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:9518534700346581975#9519711200346877394
It produces the output like this, does this helps you ?
rajesh@ORA11G>
rajesh@ORA11G> @delim_data "select * from dept"
10,ACCOUNTING,NEW YORK
20,RESEARCH,DALLAS
30,SALES,CHICAGO
40,OPERATIONS,BOSTON
PL/SQL procedure successfully completed.
rajesh@ORA11G>