The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1992
Filed:
May. 17, 1990
John S Gergely, Ponca City, OK (US);
Conoco Inc., Ponco City, OK (US);
Abstract
A monitoring device for determining presence of native hydrocarbons downward along a drilled borehole by analyzing upcoming drilling mud returning to the reserve pit. The device includes a short pulse laser of selected output wavelength disposed at a remote location to couple output light into a fiber optic cable that leads to a position at the reserve pit viewing the returning drill mud. The device employs optical coupling to project any hydrocarbon fluorescence light for return along the fiber optic cable to the remote position for reflection through a monochromator, and the fluorescence light is processed through a photomultiplier tube and data acquisition system to derive charcteristic decay lifetime signatures to distinguish between native hydrocarbons and any lighter oils contained in the drilling mud.