The jql query 'summary ~ "original estimaion"' is to show the issues which summaries contain string "original estimaion". Do you mean you need to sum up all original estimated hours for all issues which summary contains string "original estimaion"?
have a look on article https://confluence.atlassian.com/jira/advanced-searching-179442050.html
By "estimation summary", do you mean "sum of estimates"?
I ask for clarification because "estimation summary" sounds like it is a text field to me. For example "I put 4 hours down for the estimate because I think we can do this in half a days work".
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