Method and system for density correction for geophysical well logging inside drilling rods
AssigneeVale S.A.
InventorsWanderson Roberto PEREIRA, Dionisio Uendro CARLOS, Marco Antônio da Silva BRAGA
Life of this patent
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Abstract
A method and system for estimating density of material surrounding a borehole in mineral exploration, the method including inserting a tool into a drilling rod located within a borehole, the tool having a gamma radiation source and at least one sensor; raising the tool within the drilling rod; receiving gamma count readings at the at least one sensor; sending the gamma count readings to a computing device; and removing effects of the drilling rod from the gamma count readings at the computing device to calculate a density of material surrounding the borehole.
Claims15
A method for estimating density of material surrounding a borehole in mineral exploration, the method comprising:
- inserting a tool into a drilling rod located within a borehole, the tool having a gamma radiation source and at least one sensor;
- raising the tool within the drilling rod;
- receiving gamma count readings at the at least one sensor;
- sending the gamma count readings to a computing device;
- and
- removing effects of the drilling rod from the gamma count readings at the computing device to calculate a density of material surrounding the borehole.
A non-transitory computer readable medium for storing instructions which, when executed by a processor of a computing device, are configured to:
- receive gamma count readings from a sensor of a tool, the tool having a gamma ray source and being raised in a drilling rod within a borehole;
- determine a combined density from the gamma count readings;
- and
- remove effects of the drilling rod from the gamma count readings at the computing device to calculate a density of material surrounding the borehole.
Dependencies are inferred from the claim text.