CN212656815U

CN212656815U - Graduator for neutron logging instrument

Info

Publication number: CN212656815U
Application number: CN202020121761.3U
Authority: CN
Inventors: 任全悦; 张钰珊
Original assignee: Beijing Shucheng S&t Development Co ltd
Current assignee: Beijing Shucheng S&t Development Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-03-05
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a graduator for neutron logger, it includes upper cover, neutron source mounting and lower graduator, and lower graduator includes the first surface relative with the upper cover, and in the neutron source mounting was fixed on the first surface and stretched into down the graduator, the upper cover lid fitted on the neutron source mounting, wherein, the neutron source mounting includes neutron source cover and hole rand, has the annular groove in the neutron source cover, and the hole rand is established and is deviate from in the neutron source cover in order to avoid the neutron source to derive from in the annular groove. The utility model discloses a graduator for neutron logger makes the neutron source of placing in neutron source cover can not deviate from through setting up the hole rand, has improved the security. The utility model also has the characteristics of light weight, small volume and preventing the radioactive source from being manually disassembled.

Description

Graduator for neutron logging instrument

Technical Field

The utility model belongs to the technical field of the oil logging technique and specifically relates to a graduator that oil field neutron logging instrument used is related to.

Background

The petroleum logging technology is one of key technologies in the petroleum industry, and the main functions of the petroleum logging technology are to survey the petroleum distribution condition of a deep underground space and acquire high-precision distribution data information. The neutron logging instrument used for oil field neutron logging is characterized in that neutron rays emitted by a plutonium-beryllium or americium-beryllium neutron source interact with an underground rock stratum to enable elastic scattering of neutrons to be decelerated into slow neutrons, the neutron intensity completely depends on the change of the moderation characteristic of rocks, signals are transmitted to the earth surface, and the instrument records the signals. The results of the neutron log will reflect the hydrogen content of the formation surrounding the borehole, from which the petroleum formation distribution can be mapped. The neutron logging instrument is an extremely effective measuring tool for acquiring the distribution condition of oil gas stored in a deep bottom space. The raw measurements obtained from logging, which do not directly reflect the geological properties of the rock, require precise transformations to reflect the engineering values of the physical parameters of the formation. Meanwhile, the measurement uniformity of the logging instruments of the same type must be ensured. At present, the petroleum logging field mainly uses a calibration method to realize accurate conversion and ensure the consistency of measurement results among logging instruments of the same type. In the field calibration method in the calibration method, a portable calibrator is used for calibrating the instrument on a logging operation field. The graduator for the neutron logging instrument in the prior art generally has the problems of large volume, heavy weight, easy falling of a neutron source and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an effectively prevent graduator that is used for neutron logging instrument that neutron source drops.

In order to realize the above-mentioned purpose, the utility model discloses a graduator for neutron logger, including upper cover, neutron source mounting and lower graduator, down the graduator include with the relative first surface of upper cover, the neutron source mounting is fixed first surface stretches into down in the graduator, the upper cover lid fits on the neutron source mounting, wherein, the neutron source mounting includes neutron source cover and hole rand, the annular groove has in the neutron source cover, the hole rand is arranged in the annular groove in order to avoid the neutron source to deviate from in the neutron source cover.

In an embodiment of the graduator for the neutron logging instrument, the neutron logging instrument penetrates through the lower graduator along a length direction, wherein along the length direction, the length of the upper cover is smaller than that of the lower graduator.

In an embodiment of the graduator for the neutron logging instrument, the lower graduator comprises an upper shell and a lower shell which are opened and closed, and the neutron logging instrument is clamped between the upper shell and the lower shell.

In an embodiment of the graduator for the neutron logging instrument, the graduator has a first connecting side and a second connecting side opposite to each other along the length direction, the upper shell and the lower shell are connected through the hinged hinge, the second connecting side is connected with the upper shell and the lower shell through the snap fasteners.

In an embodiment of the graduator for the neutron logging instrument, the graduator further comprises a limiting structure for limiting the relative position of the lower graduator and the neutron logging instrument.

In an embodiment of the graduator for the neutron logging instrument, the limiting structure includes a positioning convex portion disposed on the lower graduator and a positioning concave portion disposed on the neutron logging instrument.

In an embodiment of the graduating apparatus for a neutron logging instrument, the positioning convex portion is disposed on the outer side of the upper shell and/or the lower shell in the width direction perpendicular to the length direction.

In an embodiment of the graduator for the neutron logging instrument, the upper shell and the lower shell are closed to form a circular through hole, and the diameter of the circular through hole corresponds to the diameter of the neutron logging instrument at the clamped position.

In an embodiment of the graduator for a neutron logging instrument described above, the upper cover is fixed to the first surface by screw members.

In an embodiment of the graduator for the neutron logging instrument, the graduator further comprises an upper cover plug, the upper cover is provided with a counter bore, the screw member is connected in the counter bore, and the counter bore is filled with the upper cover plug.

The utility model has the beneficial effects of, the utility model discloses a graduator for neutron logger makes the neutron source of placing in the neutron source cover can not deviate from through setting up the hole rand, has improved the security. The utility model also has the characteristics of light weight, small volume and preventing the radioactive source from being manually disassembled.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is a schematic perspective view of a graduator for a neutron logging instrument according to the present invention;

fig. 2 is an exploded view (first view) of the graduator for a neutron logging tool of the present invention;

fig. 3 is an exploded view (second view) of the graduator for a neutron logging tool of the present invention;

FIG. 4 is a schematic structural view of a neutron source sleeve and a hole collar of a graduator for a neutron logging instrument of the present invention;

fig. 5 is a schematic diagram of the working state of the graduator for the neutron logging instrument of the present invention;

FIG. 6 is a schematic diagram of an embodiment of the neutron tool of FIG. 5.

Wherein the reference numerals

10: graduating apparatus

100: upper cover

110: counter bore

200: neutron source fixing piece

210: neutron source sleeve

220: hole collar

211: annular groove

212: connecting part

300: lower graduator

300S: first surface

300H: connecting hole

310: upper shell

320: lower casing

330: hinged hinge

340: spring hasp

350: circular through hole

400: limiting structure

410: positioning convex part

420: positioning concave part

500: screw member

600: upper cover plug

20: neutron logging instrument

21: small diameter shaft

22: large diameter shaft

X: length direction of the film

Y: width direction of the sheet

SD 1: first connection side

SD 2: second connection side

Detailed Description

The following detailed description of the embodiments of the present invention will be provided in conjunction with the accompanying drawings and specific embodiments for further understanding the objects, aspects and functions of the present invention, but not for limiting the scope of the appended claims.

As shown in fig. 1 to fig. 3, fig. 1 is the utility model discloses a three-dimensional structure schematic diagram of graduator for neutron logging instrument, fig. 2 and fig. 3 are respectively the utility model discloses a decomposition structure schematic diagram of different visual angles of graduator for neutron logging instrument.

The utility model is used for cooperate neutron logging instrument scale, the radiation source in the graduator is the neutron source. The utility model discloses a graduator 10 for neutron logger includes upper cover 100, neutron source mounting 200 and lower graduator 300, and neutron source mounting 200 is fixed between upper cover 100 and lower graduator 300 to in neutron source mounting 200 gos deep into lower graduator 300, carries out the scale with the neutron logger that is located in lower graduator 300.

In detail, the lower scale 300 includes a first surface 300S opposite to the upper cover 100, the neutron source fixing member 200 is fixed on the first surface 300S of the lower scale 300 and extends into the lower scale 300, and the upper cover 100 covers the neutron source fixing member 200.

With reference to fig. 2 to 4, fig. 4 is a schematic structural diagram of the neutron source sleeve and the fixed hole collar of the graduator for the neutron logging instrument of the present invention. The neutron source fixing member 200 comprises a neutron source sleeve 210 and a hole clamp ring 220, wherein an annular groove 211 is formed in the neutron source sleeve 210, and the hole clamp ring 220 is arranged in the annular groove 211 of the neutron source sleeve 210. That is to say, the utility model discloses a graduator 10 for neutron logger sets up the hole snap ring 220 that is used for sheltering from the neutron source through the hole exit in neutron source cover 210, makes the neutron source of placing in neutron source cover 210 can not deviate from in the neutron source cover 210.

As shown in fig. 5, fig. 5 is a schematic diagram of the working state of the graduator for the neutron logging instrument of the present invention. The neutron logging instrument 20 is inserted into the lower graduator 300 along the length direction X, and the lower graduator 300 is clamped on the neutron logging instrument 20 along the length direction X. Referring to fig. 2 and 3, the length of the upper cover 100 is less than the length of the lower scale 300 along the length direction X. The upper cover 100 is preferably sized to cover the neutron source mount 200. In this embodiment, upper cover 100 is for overlooking the cuboid structure that the cross-section is the positive direction, and lower graduator 300 is for overlooking the rectangular cuboid structure of cross-section, the utility model discloses a graduator volume for neutron logging instrument is less, weight is lighter, do benefit to and carry.

As shown in fig. 2 to 4, the first surface 300S includes a connection hole 300H, and the neutron source casing 210 extends into the lower graduator 300 through the connection hole 300H. In addition, the neutron source casing 210 includes an everted connection 212, and the connection 212 is connected to the first surface 300S of the lower scale 300 by, for example, a screw connection. The periphery of the connection hole 300H has a recessed portion, so that the connection portion 212 and the screw connection member after installation do not protrude from the first surface 300S, and the upper cover 100 is covered and covered easily.

The lower graduator 300 comprises an upper shell 310 and a lower shell 320 which are arranged in an opening and closing manner, namely, the upper shell 310 and the lower shell 320 can be opened and closed relatively, and the neutron logging instrument 20 is clamped between the upper shell 310 and the lower shell 320.

Opposite sides of the lower graduator 300 in the length direction X are a first connection side SD1 and a second connection side SD2, respectively, the upper casing 310 and the lower casing 320 are connected by a hinge 330 at the first connection side SD1 (as shown in fig. 3), and the upper casing 310 and the lower casing 320 are connected by a snap 340 at the second connection side SD2 (as shown in fig. 4).

The utility model discloses a graduator 10 for neutron logging instrument still includes limiting structure 400 of graduator 300 and neutron logging instrument 20 relative position under the restriction.

With reference to fig. 2, 5, and 6, fig. 6 is a schematic diagram of an embodiment of the neutron tool of fig. 5. The spacing structure 400 includes a positioning protrusion 410 disposed on the lower graduator 300 and a positioning recess 420 disposed on the neutron tool 20. In other embodiments, the positioning concave portion may be disposed on the lower graduator, and the positioning convex portion may be disposed on the neutron logging instrument. Through setting up limit structure 400, avoid down graduator 300 and neutron logging instrument 20 to produce relative movement or rotation, guarantee graduator operational reliability.

In the present embodiment, the positioning protrusion 410 of the stopper structure 400 is provided on the outer side of the upper housing 310 of the lower scale 300 in the width direction Y perpendicular to the length direction X. Of course, in other embodiments, the positioning protrusion 410 may be disposed on the lower case, or on both the upper case and the lower case, all within the scope of the present invention.

Referring back to fig. 1 and 2, the upper cover 100 of the graduator 10 for a neutron logging instrument of the present invention is fixed on the first surface 300S of the lower graduator 300 by the screw member 500. Wherein the upper cap 100 has a counterbore 110 and the screw member 500 is coupled in the counterbore 110. The utility model discloses a graduator 10 for neutron logging instrument still includes upper cover end cap 600, when screw member 500 is connected in counter bore 110, residual space in the counter bore 100 is filled to upper cover end cap 600.

The utility model discloses in, the material of upper cover 100, last casing 310 and lower casing 320 is the high density polyethylene material, reduces scale in-process neutron as far as to staff's radiation. The neutron source sleeve 210, the hole clamping ring 220, the hinged hinge 330 and the spring buckle 340 are all made of 304 stainless steel materials so as to enhance the mechanical strength and ensure that the neutron source sleeve is not damaged when bearing a certain external force in the using process.

The utility model discloses an installation as follows: firstly, a neutron source is placed in a neutron source sleeve 210, a hole clamping ring 220 is clamped into an annular groove 211 in the neutron source sleeve 210 by clamping ring pliers, and the inner diameter of a hole is reduced by the protruding hole clamping ring 220, so that the effect of preventing the neutron source from falling off is achieved. Then the hinged hinge 330, the snap fastener 340 and the positioning convex part 410 are respectively fixed with the upper shell 310 and the lower shell 320, then the neutron source sleeve 210 provided with the neutron source is placed into the connecting hole 300H on the first surface 300S, the holes of the connecting part 212 of the neutron source sleeve 210 correspond to the three screw holes on the first surface 300S one by one, and the two are screwed tightly by screws. And finally, buckling the upper cover 100 at the neutron source sleeve 210 on the first surface 300S, screwing the four threaded holes by using screw pieces 500 after the four threaded holes are aligned, and filling the upper cover plug 600 with a layer of glue uniformly coated on the circumference of the upper cover plug and then into the counter bore 110 of the upper cover 100 to fill the counter bore 110. As shown in figure 1, the upper surface of the whole upper cover 100 is a plane after being plugged, so that the radioactive source can be prevented from being taken out by manually unscrewing and disassembling the upper cover in the using process.

The utility model discloses a measuring method as follows: as shown in fig. 5 and 6, the snap fasteners 340 are broken, the upper housing 310 and the lower housing 320 are opened at a certain angle, and then clamped on the neutron logging instrument 20. The upper casing 310 and the lower casing 320 are clamped on the small-diameter shaft 21 of the neutron logging instrument 20, the positioning convex part 410 on the outer side of the upper casing 310 is inserted into the positioning concave part 420 on the large-diameter shaft 22 of the neutron logging instrument 20, and then the upper casing 310 and the lower casing 320 are closed and the snap 340 is buckled. Because the diameter of the circular through hole 350 (shown in fig. 2 and 3) formed by combining the upper casing 310 and the lower casing 320 is the same as the diameter of the small-diameter shaft 21 of the clamped neutron logging instrument 20, when the positioning convex portion 410 is matched with the positioning concave portion 420, the lower graduator 300 is fixed on the neutron logging instrument 20, and cannot be displaced or rotated, thereby facilitating the subsequent measurement operation.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims

1. A graduator for a neutron logging instrument comprises an upper cover, a neutron source fixing piece and a lower graduator, wherein the lower graduator comprises a first surface opposite to the upper cover, the neutron source fixing piece is fixed on the first surface and extends into the lower graduator, and the upper cover covers the neutron source fixing piece.

2. The graduator for a neutron logging instrument of claim 1, wherein the neutron logging instrument is longitudinally penetrated into the lower graduator, wherein the length of the upper cover is less than the length of the lower graduator along the length direction.

3. The graduator for a neutron logging instrument of claim 2, wherein the lower graduator comprises an upper shell and a lower shell which are arranged in an opening and closing manner, and the neutron logging instrument is clamped between the upper shell and the lower shell.

4. The graduator for a neutron logging instrument of claim 3, wherein along the length direction, the lower graduator has opposite first and second connection sides, wherein at the first connection side, the upper and lower casings are connected by a hinged hinge, and wherein at the second connection side, the upper and lower casings are connected by a snap-fit connection.

5. The graduator for a neutron logging instrument of claim 3, further comprising a limiting structure that defines a relative position of the lower graduator and the neutron logging instrument.

6. The graduator for a neutron logging instrument of claim 5, wherein the limiting structure comprises a locating protrusion disposed on the lower graduator and a locating recess disposed on the neutron logging instrument.

7. The graduator for a neutron logging instrument of claim 6, wherein the positioning protrusions are provided on the outer side of the upper and/or lower casing in the width direction perpendicular to the length direction.

8. The graduator for a neutron logging instrument of claim 3, wherein the upper shell and the lower shell are closed to form a circular through hole, and the diameter of the circular through hole corresponds to the diameter of the neutron logging instrument at the clamped position.

9. The graduator for a neutron logging instrument according to any of claims 1 to 8, wherein the upper cover is fixed on the first surface by means of screw members.

10. The graduator for a neutron logging instrument of claim 9, further comprising an upper cap plug, the upper cap having a counterbore, the screw member being connected in the counterbore, and the upper cap plug filling the counterbore.