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AssigneeSchlumberger Technology Corporation
InventorsJohn J. Simonetti, Wolfgang Peter Ziegler, Edward F. Durner, Jr., Catherine Danielle Marie Busser
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The present invention provides scintillation material having good stability at continuous operating temperatures of at least 175° C. The scintillation material includes a cross linked copolymer with improved aromatic character that form a host plastic having properties of a thermoset polymer. The host plastic contains a primary fluorescent agent and a wavelength shifter. Preferably, the copolymer is comprised of a styrene derivative such as, for example, p-t-butylstyrene, and a higher melting point compound such as, for example, 4-vinylbiphenyl. In accordance with one aspect of the present invention, the scintillation material possesses properties of: good mechanical properties at high temperature (e.g., a Tg of about 180° C.); excellent light output (e.g., energy transfer efficiency); high hydrogen content for fast neutron detection; good optical transparency; and stable operation at temperature.
A scintillator comprising a copolymer cross-linked with an aromatic agent to form a host polymer having properties of a thermoset, said host polymer containing a primary fluorescent agent and a wavelength shifter.
An apparatus for determining the characteristics of a formation surrounding a borehole, comprising:
An apparatus for determining the characteristics of a formation surrounding a borehole, comprising:
Dependencies are inferred from the claim text.