A salvageable source top-mounted neutron meter

A neutron instrument, top-mounted technology, used in climate sustainability, wellbore/well components, construction, etc., can solve problems such as difficulty in salvaging neutron instruments, achieve pressure balance, ensure stability, and reduce radioactive leakage. Effect

Active Publication Date: 2022-05-17
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a source top-mounted neutron meter that can be salvaged, which solves the problem that the existing neutron meter is difficult to salvage, can salvage the neutron meter, and reduces the risk of radioactive pollution

Method used

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  • A salvageable source top-mounted neutron meter
  • A salvageable source top-mounted neutron meter
  • A salvageable source top-mounted neutron meter

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A salvageable source top-mounted neutron instrument, see Figure 2-8The neutron meter includes: salvage head assembly, upper joint 3, housing 4, pressure ring 6, compression spring 7, spring pressure sleeve 8 and source chamber assembly. Among them, the spring pressure sleeve 8 sets are placed on the salvage head assembly, the compression spring 7 sets are placed on the side wall of the spring pressure sleeve 8, and the pressure ring 6 sets are placed at the first end of the spring pressure sleeve 8 and fixed at the first end of the housing 4. The upper joint 3 is fixed at the first end of the housing 4, the upper joint 3 has a through cavity, the housing 4 has a mounting cavity with a first end opening, the mounting cavity is opposite to the cavity of the upper joint 3, the salvage head assembly, the pressure ring 6, the compression spring 7, the spring pressure sleeve 8 and the source warehouse assembly are within the upper joint 3 and the housing 4, and the compression s...

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Abstract

The invention discloses a salvageable source top-mounted neutron meter. The neutron meter includes: a salvage head assembly, which includes: a salvage head and a filling material. The side wall is provided with: the weak point pin; the upper joint, the inner wall of the cavity is provided with a mounting groove, a card groove and an inner groove, and the weak point pin is stuck against the inner groove; the outer shell is fixed on the second end of the upper joint; the spring pressure The sleeve is set on the side wall of the fishing head, and the side wall is provided with: a limit protrusion; a pressure ring, which is set on the spring pressure sleeve, and is fixed at the first end of the installation cavity; a compression spring, whose It is sleeved on the spring compression sleeve and is in a compressed state; and the source bin assembly is in the installation cavity and fixed on the opening end of the filling cavity. When in use, when fishing, under the action of the pulling force, the weak point pin is disconnected, and the fishing head assembly moves up from the upper joint and the shell together with the source bin assembly, reducing the risk of radioactive contamination.

Description

Technical field [0001] The present invention relates to a source top-mounted neutron instrument, specifically to a salvagable source top-mounted neutron instrument. Background [0002] Neutron logging is a formation porosity logging instrument, the technical principle of the instrument is: through the chemical radioactive source to the formation to emit fast neutrons, fast neutron collision with formation elements slow down into slow neutrons, and quickly converted into thermal neutrons, and finally form a hot neutron cloud near the neutron source. Since hydrogen (H) in formations plays a decisive factor in neutron deceleration and slowing down, measuring the concentration decay ratio of hot neutrons near neutron sources allows for an estimate of the amount of element H in formations. The H element in the formation is only present in the pore fluid (water, oil) of the formation, which further infers the porosity of the formation. [0003] Conventional compensation neutron instru...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21B47/11E21B31/20
CPCE21B31/20Y02E30/30
Inventor张正玉田太华郑伟林刘虎吴智勇刘殿清李阳兵李坤暴春雨林毓宸许占富章文达于珍珠黄艳军
Owner中石化石油工程技术服务有限公司