CN214787344U - Protective structure for crystal measurement window of while-drilling detector - Google Patents
Protective structure for crystal measurement window of while-drilling detector Download PDFInfo
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- CN214787344U CN214787344U CN202120693451.3U CN202120693451U CN214787344U CN 214787344 U CN214787344 U CN 214787344U CN 202120693451 U CN202120693451 U CN 202120693451U CN 214787344 U CN214787344 U CN 214787344U
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Abstract
The utility model relates to a along with boring detector crystal measurement window protective structure is equipped with the shielding version above the probe shell, has seted up first receiving window on the shield plate, has seted up the second receiving window on the probe shell, all fills the wear-resisting corrosion resistant rubber of high temperature in first receiving window and the second receiving window. The interference of useless signals to the well logging process is greatly reduced due to the enhancement of the shielding effect of the detector, and in addition, the high-density material shielding plate which is detachable and provided with the rubber filling receiving window is additionally arranged on the shell of the detector, so that the probe shell is not required to be replaced if the high-density material shielding plate is damaged or abraded in the well logging process, the probe can be conveniently replaced on site, the service life of the probe is prolonged, and the timeliness of well logging is ensured. The filled high-temperature rubber is bonded and pressed after assembly, so that the rubber is easily formed in a formed hole groove and is not easily damaged in the machining and logging processes.
Description
Technical Field
The utility model belongs to the technical field of the detector, concretely relates to along with boring detector crystal measurement window protective structure.
Background
The density logging detector is a detector component frequently used in petroleum formation porosity exploration, and generally comprises a metal shell, an internal detector assembly and a seal head. During logging, a detector receives ray signals from a stratum, converts the ray signals into digital signals through methods such as radioactivity or photoelectric conversion, and conducts calculation and analysis after the digital signals are stored through a cable leading-in circuit or data are uploaded through a remote transmission instrument. The internal detector assembly mainly comprises a high-density material shield, a receiver (a radioactive receiving crystal), a photomultiplier and partial circuits.
The use of larger detectors (receiving crystals) and thicker shields creates a conflict due to the limitations of detector size and configuration, and the thickness of the shield must be reduced when the detector size is larger. Although the sensitivity of the probe is improved, the useless ray signals are increased, the interference is increased, on the contrary, when the thickness of the shielding body is increased, a detector with a smaller diameter is used, the sensitivity of the probe is reduced, and the useful stratum ray signals are blocked. Because the shell of the probe is made of titanium alloy or precipitation hardening stainless steel metal, the shielding effect on rays is not strong due to the relatively low density value of the shell, all rays from the stratum direction can enter the detector from the upper part of the probe, and the high-density shielding body of the internal detector can be shielded. Due to the limitation of the structure, the thickness of the internal shielding body is poor in shielding effect. During logging, more stray rays and useful rays from the stratum are mixed together and enter the receiving crystal, so that the acquisition, analysis and processing of instrument signals are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, provide a along with boring detector crystal measurement window protective structure, increased the high density material shield plate who fills rubber receiving window (energy window) above the probe shell, prevented that useless ray and stray ray from getting into the receiver to the reduction is to the interference of useful signal.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a along with boring detector crystal measurement window protective structure, includes the detector, be equipped with the probe shell on the detector, probe shell top is equipped with the shield plate, first receiving window has been seted up on the shield plate, the second receiving window has been seted up on the probe shell.
Further: the width of the shielding plate is the same as that of the probe shell, and the length of the shielding plate is matched with that of the internal detector assembly;
further: the shielding plate is fastened on the probe shell through screws, so that the probe shell is convenient to disassemble and replace;
further: the first receiving window and the second receiving window are filled with high-temperature wear-resistant corrosion-resistant rubber;
further: the direction, size, shape, distance and depth of the first or second receiving window are determined according to the structure of the internal probe.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a detector crystal measurement window protective structure while drilling, is equipped with the shielding version above the probe shell, has seted up first receiving window on the shielding plate, has seted up the second receiving window on the probe shell, all fill high temperature wear-resisting corrosion resistant rubber in first receiving window and the second receiving window. Because the shielding effect of the detector is enhanced, the interference of useless signals to the logging process is greatly reduced, and compared with the detector with the traditional structure, the influence of scattered and diffuse reflected rays on the background counting rate is reduced, so that the logging data is more real and reliable. In addition, the detachable high-density material shielding plate with the rubber filling receiving window is additionally arranged on the detector shell, so that the probe shell can be conveniently replaced on site if damaged or abraded in the logging process, the probe shell does not need to be replaced, the service life of the probe is prolonged, and the timeliness of logging is ensured. The filled high-temperature rubber is bonded and pressed after assembly, so that the rubber is easily formed in a formed hole groove and is not easily damaged in the machining and logging processes.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required to be used in the description of the embodiment will be briefly introduced below, it is obvious that the drawings in the following description are only for more clearly illustrating the embodiment of the present invention or the technical solution in the prior art, and for those skilled in the art, other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a sectional view of the overall structure of the present invention;
fig. 2 is a top view of the present invention;
in the figure: 1. the device comprises a detector, 2, a probe shell, 3, a second receiving window, 4, a shielding plate, 5, a first receiving window, 6 and a screw.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to the following specific embodiments, which are provided as illustration only and are not intended to limit the present invention.
The crystal measurement window protection structure of the while-drilling detector shown in the figures 1-2 comprises a detector 1, wherein a probe shell 2 is arranged on the detector 1, a shielding plate 4 is arranged above the probe shell 2, a first receiving window 5 is arranged on the shielding plate 4, and a second receiving window 3 is arranged on the probe shell 2.
The width of the shielding plate 4 is the same as that of the probe shell 2, and the length of the shielding plate is matched with that of the internal detector assembly;
the shielding plate 4 is fastened on the probe shell 2 through a screw 5, so that the probe shell is convenient to disassemble and replace;
the first receiving window 5 and the second receiving window 3 are filled with high-temperature wear-resistant and corrosion-resistant rubber, the filled rubber is protected by the shielding plate 4 and is not easy to damage or fall off, the interference of an unnecessary ray signal of the detector 1 can be greatly reduced, and the field replacement is convenient;
the direction, size, shape, distance and depth of the first or second receiving window 5, 3 are determined according to the structure of the internal probe.
The utility model relates to a follow and bore detector crystal measurement window protective structure increases the shield plate above the probe shell, and its width is the same with the probe, and its length can be according to the length phase-match of inside detector assembly. A first receiving window and a second receiving window are formed in the upper surfaces of the shielding plate and the probe shell, the direction, the size, the shape, the distance, the depth and the like of the first receiving window and the second receiving window can be set according to the structure of the internal detector, and high-temperature wear-resistant corrosion-resistant rubber is filled in the first receiving window and the second receiving window. When the probe is not changed in other dimensions, the shielding strength can be increased by one time or even several times (the thickness and length of the shielding plate need to be determined according to the specific dimensions of the instrument). When the detection ray enters from the upper part of the detector after being reflected from the stratum, due to the shielding of the shielding plate, not only part of scattered rays generated by a logging radioactive source are blocked, but also disordered rays generated from the original stratum are blocked, particularly on a short-source-distance detector, only the most effective and concentrated rays from the detected stratum end to enter a detection receiver through a first receiving window (energy window) or a second receiving window filled with rubber, and the entering proportion (the size of the opening window) is set according to a detection method. Therefore, the influence of most useless rays or scattered rays on the background counting rate of the detector is reduced, and the accuracy of required stratum detection is improved.
The present invention is not described in detail in the prior art.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a along with boring detector crystal measurement window protective structure, includes detector (1), its characterized in that: be equipped with probe shell (2) on detector (1), probe shell (2) top is equipped with shield plate (4), first receiving window (5) have been seted up on shield plate (4), second receiving window (3) have been seted up on probe shell (2).
2. The protective structure for the crystal measurement window of the while-drilling probe according to claim 1, wherein: the width of the shielding plate (4) is the same as that of the probe shell (2), and the length of the shielding plate is matched with that of the internal detector assembly.
3. The protective structure for the crystal measurement window of the while-drilling probe according to claim 1, wherein: the shielding plate (4) is fastened on the probe shell (2) through a screw (6), so that the probe shell is convenient to disassemble and replace.
4. The protective structure for the crystal measurement window of the while-drilling probe according to claim 1, wherein: the first receiving window (5) and the second receiving window (3) are filled with high-temperature wear-resistant and corrosion-resistant rubber.
5. The protective structure for the crystal measurement window of the while-drilling probe according to claim 1, wherein: the direction, size, shape, distance and depth of the first receiving window (5) or the second receiving window (3) are determined according to the structure of the internal detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120693451.3U CN214787344U (en) | 2021-04-06 | 2021-04-06 | Protective structure for crystal measurement window of while-drilling detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120693451.3U CN214787344U (en) | 2021-04-06 | 2021-04-06 | Protective structure for crystal measurement window of while-drilling detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214787344U true CN214787344U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120693451.3U Active CN214787344U (en) | 2021-04-06 | 2021-04-06 | Protective structure for crystal measurement window of while-drilling detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214787344U (en) |
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2021
- 2021-04-06 CN CN202120693451.3U patent/CN214787344U/en active Active
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