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Neutron Generators for Measurements While Drilling

A neutron generator and measurement-while-drilling technology, which is applied in oil and natural gas drilling fields, to achieve the effect of prolonging working time, solving the instability of neutron production and improving reliability

Active Publication Date: 2017-12-08
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method and device for effectively improving the reliability of the neutron generator downhole, so as to solve the problem of neutron pores while drilling under the environment of high temperature, high pressure, and strong vibration and impact. Reliable and Stable Work of the Neutron Source of the Degree Measuring Instrument

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  • Neutron Generators for Measurements While Drilling
  • Neutron Generators for Measurements While Drilling
  • Neutron Generators for Measurements While Drilling

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Embodiment Construction

[0014] Hereinafter, the implementation of the technical solution will be further described in detail with reference to the accompanying drawings.

[0015] Those skilled in the art can understand that although the following description relates to many technical details related to the embodiments of the present invention, this is only an example for illustrating the principle of the present invention, and does not imply any limitation. The present invention can be applied to occasions other than the technical details exemplified below, as long as they do not deviate from the principle and spirit of the present invention.

[0016] In addition, in order to avoid limiting the description of this specification to cumbersomeness, in the description of this specification, some technical details that can be obtained in the prior art materials may be omitted, simplified, modified, etc., which is important to the technology in the field. It is understandable for personnel, and this will not a...

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Abstract

The application discloses a neutron generator for measurement while drilling. The neutron generator comprises an upper connector, a spring damping mechanism, a neutron generator upper connector, a semiconductor refrigeration device, and a neutron tube arranged in sequence from top to bottom, the neutron generator also comprises a protection sleeve for containing the above parts, the semiconductor refrigeration device is arranged at the outside of an accelerating electrode of the neutron tube and used for cooling the accelerating electrode of the neutron tube, a cooling surface of the semiconductor refrigeration device is tightly contacted with a shell of the neutron tube, and the space between the heat radiation surface of the semiconductor refrigeration device and the protection sleeve is filled with heat conduction silicone grease. According to the neutron generator, during neutron porosity measurement while drilling based on the neutron generator, effective damping measures are taken, the neutron generator satisfies the requirement while drilling, the problem of unstable yield of neutrons due to overheating of the neutron tube is effectively solved via the control of the semiconductor refrigeration device, and the work time of the neutron generator is extended via the mode of time-sharing intermittent control of driving pulse.

Description

Technical field [0001] The present invention relates to the field of oil and natural gas drilling, in particular to a technology for measuring neutron porosity while drilling in a geosteering drilling system, and in particular to a technology for improving downhole reliability of a neutron generator in a neutron porosity measurement system while drilling Method and device. Background technique [0002] Neutron logging while drilling is a formation porosity measurement method. The neutron source carried by the measurement while drilling device emits high-energy fast neutrons to the surrounding formation, and the energy and intensity of the neutrons in the formation are measured in real time to obtain the formation. Porosity and other lithological parameters are mainly used for real-time formation evaluation during drilling. [0003] In the mid-1990s, several major foreign oilfield technical service companies (Schlumberger, Baker Hughes, Halliburton, Weatherford, etc.) have develope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H3/06
Inventor 艾维平窦修荣王鹏贾衡天毛为民曹冲范锦辉蓝蓉彭浩
Owner BC P INC CHINA NAT PETROLEUM CORP
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