{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9645277","patent":{"patent_number":"US-9645277","title":"Estimating molecular size distributions in formation fluid samples using a downhole NMR fluid analyzer","assignee":null,"inventors":[],"filing_date":"2013-02-12T00:00:00.000Z","publication_date":"2017-05-09T00:00:00.000Z","cpc_codes":["G01N"],"num_claims":18,"abstract":"A method for estimating a property of subsurface material includes extracting a sample of the material using a downhole formation tester and performing a plurality of nuclear magnetic resonance (NMR) measurements on a sensitive volume in the sample where each measurement in the plurality is performed in a static homogeneous magnetic field with a pulsed magnetic field gradient that is different in magnitude from other NMR measurements to provide a waveform signal. The method further includes transforming each received waveform signal from a time domain into a frequency domain and comparing the frequency domain signal to a reference to provide proton chemical-shift information related to a chemical property of one or more molecules in the sample and transforming the frequency domain signals into a complex number domain that quantifies waveform signal amplitude changes to provide one or more diffusion rates with each diffusion rate being associated with a corresponding frequency."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Estimating molecular size distributions in formation fluid samples using a downhole NMR fluid analyzer","description":"A method for estimating a property of subsurface material includes extracting a sample of the material using a downhole formation tester and performing a plurality of nuclear magnetic resonance (NMR) ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9645277","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9645277","citation_suggestion":"Patentable. \"Estimating molecular size distributions in formation fluid samples using a downhole NMR fluid analyzer\" (US-9645277). https://patentable.app/patents/US-9645277","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9645277","json":"https://patentable.app/api/llm-context/US-9645277","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:14:58.051Z"}