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Multiple gamma controller assembly

a gamma controller and assembly technology, applied in the field of downhole radiation measurement assemblies, can solve the problems of increasing harsh environment of radiation measurement assemblies, many radiation measurement sensors are particularly sensitive and malfunction, and achieve the effect of facilitating reliable measurement of naturally occurring radiation

Inactive Publication Date: 2015-08-06
REME LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a better way to measure the radiation emitted from geological formations downhole. It uses multiple sensors and a microcontroller to interpret and check the measurements, and then sends them uphole for further processing and display. The microcontroller can select or average data from multiple sensors and communicate it only if it appears to be functioning properly. This invention helps gather reliable data and make better decisions in the oil and gas industry.

Problems solved by technology

Radiation measurement assemblies can experience harsh vibrations and temperatures as well as other environmental conditions during the installation process, when taking radiation measurements, while sitting downhole, and also during retrieval.
Over time drilling operations have seen drilling to greater depths, causing radiation measurement assemblies to experience increasingly harsher environments.
In addition, many of the radiation measurement sensors can be particularly sensitive and malfunction in response to vibration, harsh temperatures, and other environmental factors.
Vibration factors can be particularly problematic for radiation measurement sensors used in downhole radiation measurement assemblies.

Method used

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Embodiment Construction

[0024]One purpose of the improved gamma controller assembly is to increase the reliability of downhole gamma sensor measurements. One of the frequent failures in a measurement while drilling system is for the gamma probe to fail. This can be very costly to remedy as the entire drill string has to be pulled from the well to replace the gamma probe, if there is even a spare available.

[0025]To mitigate this failure mode, the multiple gamma controller assembly facilitates redundant gamma probes in a single measurement while drilling tool. The multiple gamma controller assembly can also be configured to log various parameters of the tool downhole to assist with failure analysis when the tool is serviced. Using heuristics, if the multiple gamma controller assembly determines that each gamma probe is operating correctly, the multiple gamma controller assembly can then output a single pulse train which is a combined and filtered or alternately a single averaged reading from the multiple ind...

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Abstract

An improved gamma controller assembly to facilitate reliable downhole measurement of naturally occurring radiation is disclosed. The gamma controller assembly includes multiple gamma sensors, a micro-controller, memory, and input / output ports among other components. The multiple gamma sensors detect radiation and output pulses that are received by the microcontroller. The sensor data can be checked, selected, and averaged by the microcontroller, and sent uphole to another microcontroller or computer that can then further process, communicate, and display the data. The sensor data can be averaged and stored to memory or stored as independent values to memory. The gamma controller assembly can be configured to run algorithms that detect if one gamma controller appears to be malfunctioning and, if an apparent malfunction has occurred, adjust the sensor data that is being sent uphole.

Description

RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 14 / 174,700, filed on Feb. 6, 2014, which claims the benefit of U.S. Provisional Patent Application, Ser. No. 61 / 835,188 filed on Jun. 14, 2013 and U.S. Provisional Patent Application, Ser. No. 61 / 886,509 filed on Oct. 3, 2013, each incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to downhole radiation measurement assemblies.[0004]2. Description of the Related Art[0005]Downhole radiation measurement assemblies have been used in drilling operations for some time. In downhole drilling it is useful identify sub-surface rock formations and customize drilling assemblies and drilling methods to suit a particular geological formation. This can be useful when, for example, a drilling rig has been configured to be effective for a particular type of rock formation and characteristics of the rock formation change as the wel...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01V5/12
CPCG01V5/12E21B47/12G01V5/04G01T7/00
Inventor MILLER, KENNETHERDOS, ABRAHAMERDOS, DAVIDMATHIESON, JAMESCARTER, JOSHUA
Owner REME LLC
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