{"id":"https://openalex.org/keywords/lost-circulation","display_name":"lost circulation","description":"The loss of drilling fluid into permeable or fractured geological formations during drilling operations.","display_name_alternatives":["loss circulation","circulation loss","loss of circulation","loss of drilling fluid","lost returns"],"ids":{"openalex":"https://openalex.org/keywords/lost-circulation","wikidata":"https://www.wikidata.org/wiki/Q17146786"},"primary_topic":{"id":"https://openalex.org/T10892","display_name":"Drilling and Well Engineering","score":0.9175,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10892","display_name":"Drilling and Well Engineering","score":0.9175,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":4507,"cited_by_count":33516,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/lost-circulation","updated_date":"2026-10-21T04:06:17","created_date":"2022-04-12T19:38:12"}