CN211699740U

CN211699740U - Logging source

Info

Publication number: CN211699740U
Application number: CN202020118398.XU
Authority: CN
Inventors: 付玉; 任全悦
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: 2020-10-16
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a logging source, it includes the source main part, and a tip of source main part is provided with the holding hole of holding radiation source, and it still includes end cap and hole collar spare, and the inner wall in holding hole is provided with the annular groove, and the end cap sets up in the holding hole and the shutoff radioactive source is downthehole from the holding, and hole collar spare card is established in the annular groove in order to prevent that end cap and radiation source from deviating from the holding hole. The utility model discloses a logging source is whole parcel formula, avoids the radioactive source to expose and drop through hole ring spare and end cap, and convenient assembling.

Description

Logging source

Technical Field

The utility model belongs to the technical field of the oil logging technique and specifically relates to a logging source that uses in oil field logging is related to.

Background

Logging is generally referred to as geophysical logging, and logging instruments are manufactured using various physical principles and are used to detect downhole parameters and draw corresponding curves for the purpose of identifying oil, gas, water, coal, etc. in a well, including radioactive logging. The radioactive source used in the radioactive logging can not be directly arranged on a logging instrument, the radioactive source is required to be arranged on a source head firstly and then is arranged on the logging instrument, the former radioactive source is screwed into the source head from bottom to top, as shown in figure 1, the radioactive source 1 is screwed into the source head 2 from bottom to top, the end part of the radioactive source 1 is exposed outside, and the radioactive source 1 is easy to corrode due to the complex underground environment and has the risk of falling off of the radioactive source 1.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a logging source head that effectively prevents the radiation source and drop.

In order to achieve the above object, the utility model discloses a logging source head includes the source main part, a tip of source main part is provided with the holding hole of holding radiation source, and it still includes end cap and hole ring spare, the inner wall in holding hole is provided with the annular groove, the end cap set up in the downthehole and shutoff of holding the radiation source is from in the holding is downthehole, hole ring spare card is established in the annular groove in order to prevent end cap and radiation source follow the downthehole deviating from of holding.

In an embodiment of the above logging source head, the plug includes a first outer diameter section and a second outer diameter section, the diameter of the first outer diameter section is greater than the diameter of the second outer diameter section, the second outer diameter section abuts against the radiation source, and the first outer diameter section is in threaded connection with the inner wall of the accommodating hole.

In an embodiment of the above logging source head, the first outer diameter section is provided with an external thread along an axial outer circumference, the aperture of the accommodating hole is adapted to the diameter of the first outer diameter section, and the inner wall of the accommodating hole corresponding to the first outer diameter section is provided with a corresponding internal thread.

In an embodiment of the above logging source, the annular groove is close to the opening of the receiving hole relative to the internal thread.

In an embodiment of the above logging source head, a top end surface of the first outer diameter section facing the opening of the receiving hole has a force application portion.

In an embodiment of the above logging source head, the force application portion is a polygonal groove.

In an embodiment of the above logging source head, the force application portion is a hexagonal recess.

In an embodiment of the above logging source head, the force applying portion is two force applying holes arranged along a diameter direction of a top end surface of the source end.

In an embodiment of the above logging source, the hole collar is a titanium alloy member.

The utility model has the beneficial effects of, the utility model discloses a logging source is whole parcel formula, avoids the radiation source to expose and drop through hole ring spare and end cap, and convenient assembling.

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 block diagram of one embodiment of a prior art logging source;

fig. 2 is a schematic structural diagram of an embodiment of the source of logging of the present invention.

Wherein the reference numerals

In the prior art:

1: radiation source

2: source head

The utility model discloses in:

10: logging source

100: source main body

110: containing hole

111: annular groove

112: internal thread

200: plug

210: first outer diameter section

211: external thread

212: acting part

220: second outer diameter section

300: hole clamp ring piece

20: radiation source

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.

The utility model discloses a logging source is whole parcel formula, and there is the opening only at the top, and the radiation source is put into from open-top, then puts into the source with the end cap, and annular groove position can prevent effectively that radiation source and end cap from droing with hole ring spare card in the source at last. Even if the underground environment is complex, the hole clamping ring piece made of the titanium alloy material is difficult to corrode, so that the risk of falling of the radioactive source is reduced. Simultaneously the utility model discloses changed the structure that the radiation source exposes outside to protected the radiation source not destroyed.

As shown in fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the source head of the present invention. The utility model discloses a logging source 10 includes source main part 100, end cap 200 and hole ring spare 300, a tip of source main part 100 is provided with holding hole 110 of holding radiation source 20, the inner wall of holding hole 110 is provided with annular groove 111, end cap 200 sets up in holding hole 110 and shutoff radiation source 20 in holding hole 110, hole ring spare 300 card is established in annular groove 111 on holding hole 110's inner wall to prevent that end cap 200 and radiation source 20 from deviating from holding hole 110.

Specifically, the installation process includes first placing the radiation source 20 into the receiving hole 110 at the top of the source main body 100, then placing the plug 200 into the receiving hole 110 at the top of the source main body 100, wherein one end of the source 200 is pressed against the radiation source 20, and the other end faces the opening of the receiving hole 110, and finally, using the collar clamp to clamp the hole collar member 300 into the annular groove 111 on the inner wall of the receiving hole 110, and simultaneously, the hole collar member 300 extends out in the radial direction, so as to reduce the aperture at the opening of the receiving hole 110, thereby preventing the plug 200 and the radiation source 20 from coming out of the receiving hole 110.

In addition, in the present invention, the plug 200 enters the accommodating hole 110 from the opening of the accommodating hole 110 and is screwed to the inner wall of the accommodating hole 110. As shown in the figure, the plug 200 includes a first outer diameter section 210 and a second outer diameter section 220 with different outer diameters, the diameter of the first outer diameter section 210 is larger than that of the second outer diameter section 220, the second outer diameter section 220 presses against the radioactive source 20, and the first outer diameter section 210 is in threaded connection with the inner wall of the receiving hole 110 of the source head main body 100. That is, the second outer diameter section 220 of the plug 200 with a smaller outer diameter enters the receiving hole 110 and presses against the radioactive source 20, and the first outer diameter section 210 with a larger outer diameter enters the receiving hole 110 and is connected to the inner wall of the receiving hole 110.

The first outer diameter section 210 is provided with an external thread 211 along the axial outer circumference, the inner diameter of the accommodating hole 110 is adapted to the diameter of the first outer diameter section 210, and the inner wall of the accommodating hole 110 corresponding to the first outer diameter section 210 is provided with a corresponding internal thread 112. The annular groove 111 on the inner wall of the receiving hole 110 is located closer to the opening of the receiving hole 110 than the internal thread 112, or, as shown, the annular groove 111 is located above the internal thread 112.

In the present invention, the plug 200 is completely disposed in the accommodating hole 110, and the top end surface of the first outer diameter section 210 facing the opening of the accommodating hole 110 has a force applying portion 212 for easy operation.

The force application portion 212 is, for example, a polygonal groove, in this embodiment, the force application portion 212 is a hexagonal groove, and a hexagon socket wrench applies force to the hexagonal groove, so that the plug 200 is screwed and tightened with respect to the accommodating hole 110. Of course, the force application portion may have other polygonal shapes, such as a triangle, a quadrangle, etc., and the present invention is not limited thereto.

In other embodiments, the force application part can be two force application holes arranged along the diameter direction of the top end surface, and the two force application holes are clamped by a clamping ring clamp so that the plug is screwed and tightened relative to the containing hole.

The hole collar 300 is, for example, a titanium alloy.

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. The utility model provides a logging source head, includes the source main part, a tip of source main part is provided with the holding hole of holding radiation source, its characterized in that still includes end cap and hole collar spare, the inner wall in holding hole is provided with annular groove, the end cap set up in the downthehole shutoff of holding the radiation source is in the holding hole, hole collar spare card is established in the annular groove in order to prevent end cap and radiation source follow deviate from in the holding hole.

2. The source head of claim 1, wherein the choke plug comprises a first outer diameter section and a second outer diameter section, the first outer diameter section having a diameter greater than a diameter of the second outer diameter section, the second outer diameter section bearing against the radiation source, the first outer diameter section threadedly coupled to an inner wall of the receiving bore.

3. The source head of claim 2, wherein the first outer diameter section is provided with external threads on its outer circumference in the axial direction, the receiving hole has a diameter adapted to the diameter of the first outer diameter section, and the receiving hole has corresponding internal threads on its inner wall corresponding to the first outer diameter section.

4. The source head of claim 3, wherein the annular groove is proximate the opening of the receiving bore relative to the internal threads.

5. The source head of claim 2, wherein a top end face of the first outer diameter section facing the opening of the receiving bore has a landing.

6. The source head of claim 5, wherein the landing is a polygonal groove.

7. The source head of claim 6, wherein the landing is a hexagonal recess.

8. The source head of claim 5, wherein the landing portion is two landing holes diametrically disposed along a top end face of the source end.

9. A source head according to any of claims 1 to 8, wherein the bore collar member is a titanium alloy member.