Exemption-level while-drilling natural gamma and energy spectrometer graduator

Abstract

The utility model provides an exemption-level while-drilling natural gamma and energy spectrometer graduator, which belongs to the technical field of underground geological mineral exploration and detection equipment and comprises a film for an energy spectrometer, the film for the energy spectrometer is prepared by mixing natural radiation raw materials and adhesives, and the proportion of the natural radiation raw materials and the adhesives can be adjusted according to requirements. The natural radiation raw materials comprise natural uranium-containing rock powder and natural thorium-containing rock powder, and the ratio of uranium in the natural uranium-containing rock powder to thorium in the natural thorium-containing rock powder is 2: 1. The exempt-level while-drilling natural gamma and energy spectrometer film does not belong to a radioactive source, and the radiation level belongs to an exempt level; the radiation spectrum is highly similar to the spectrum of radium 226, radon gas harmful to people is not generated in the storage state, an existing radioactive source radium 226 can be replaced, use is safe, and the while-drilling natural gamma and energy spectrum instrument can work under the uniform and stable working condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas well detection equipment, and specifically relates to an exemption-level film and a calibrator for a natural gamma ray and energy spectrum instrument while drilling. Background Art

[0002] Petroleum exploration refers to the use of various exploration methods to understand the underground geological conditions, determine favorable areas for oil and gas accumulation, and find oil and gas storage closures in order to find and identify oil and gas resources. Among them, the most commonly used method is to use downhole logging technology for exploration.

[0003] In traditional technologies and process methods, natural gamma instruments or natural gamma spectrometers need to be calibrated with a radioactive source first. Only after the calibration is completed can the instrument be used for oil and gas exploration. The radioactive source radium 226 used for calibration has a long half-life, high energy, and in its storage state will produce radon gas that is harmful to humans. Its production, sales, and storage are all strictly controlled by the state, which seriously affects the development of production activities in the oil industry.

[0004] The currently widely used gamma ray and energy spectrum instruments while drilling are all of eccentric structure and must be calibrated in a uniform, stable radiation field with known radiation value. In this way, the original logging field calibration method can no longer be applied. Therefore, an exemption-level film and calibrator for natural gamma ray and energy spectrum instruments while drilling are needed to solve this problem. Summary of the invention

[0005] To achieve the above-mentioned purpose, the utility model provides an exemption-level downhole natural gamma and energy spectrum instrument calibrator, including a vertical shell, the shell is hollow and cylindrical with upper and lower ends opened, the upper and lower ends of the shell are provided with annular fixed frames, a plurality of fixed columns are vertically arranged between the two fixed frames, the upper and lower ends of the fixed columns respectively pass through the two fixed frames, and each of the fixed columns is fixedly connected to the fixed frame by a locating pin, and the plurality of fixed columns are arranged on a circle with the shell as the center.

[0006] Furthermore, the outer shell is a double-layer sleeve composed of tile body nylon and tile surface nylon, the tile surface nylon is sleeved on the outside of the tile body nylon, and a film is provided in the gap between the tile surface nylon and the tile body nylon, and the distribution of the film is uniform or uneven, and the upper and lower ends of the tile surface nylon and the tile body nylon are both inserted in the fixed frame.

[0007] Furthermore, the fixed frame is composed of an arc-shaped first frame and a second frame, and both ends of the first frame and the second frame are connected by bolts.

[0008] Furthermore, a plurality of through holes are evenly formed on the first frame and the second frame.

[0009] Furthermore, the through hole is in a rectangular or circular shape.

[0010] Furthermore, the number of the fixing columns is not less than four, and films are placed inside the fixing columns (3).

[0011] Furthermore, the shell, the fixed frame and the fixed column are all made of lightweight, high-strength and high-radiation-transmittance materials.

[0012] The utility model has the following advantages: the utility model provides the exemption-level film for the logging while drilling natural gamma and energy spectrum instrument, the radiation level belongs to the exemption level, the radiation spectrum is highly similar to the spectrum of radium 226, and no radon gas harmful to people is generated in the storage state, and the existing radioactive source radium 226 can be replaced, and the use is safe, so that the logging while drilling natural gamma and energy spectrum instrument can work under uniform and stable working conditions; the utility model provides the exemption-level calibrator for the logging while drilling natural gamma and energy spectrum instrument, and the calibration can be performed by using the film, so as to solve the problem of the difficulty of on-site calibration of the logging while drilling at present, and the utility model is easy to install and use, which is beneficial to the production and development of the petroleum industry.

[0013] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the shell structure of the utility model.

[0016] Figure 3 This is a schematic diagram of the first frame structure of the utility model.

[0017] Figure 4 It is a schematic diagram of the second frame structure of the utility model.

[0018] Explanation of the reference numerals: 1. Shell; 11. Nylon tile body; 12. Nylon tile surface; 2. Fixed frame; 21. First frame; 22. Second frame; 3. Fixed column; 4. Positioning pin; 5. Through hole. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0023] Example 1

[0024] This embodiment provides Figure 1 to Figure 4 An exemption-level film for natural gamma ray and energy spectrum instruments while drilling is shown, including film for energy spectrum instruments, which is formed by mixing and pressing natural radiation raw materials and adhesives, the adhesive can prevent the natural radiation raw materials from escaping and play a waterproof role at the same time, the ratio of natural radiation raw materials to adhesives is 2:3, and the ratio of natural radiation raw materials to adhesives can be adjusted according to needs; the radiation raw materials include uranium ore and thorium ore, the ratio of uranium in uranium ore to thorium in thorium ore is 2:1, the natural radiation raw materials are composed of ore powder containing 1% uranium and ore powder containing 1% thorium, wherein the ratio data can be adjusted according to the needs of actual application, and the adhesive is a polymer material, such as rubber.

[0025] The radiation level of this exempt-level film for natural gamma and energy spectrum instruments while drilling is exempt-level, and its radiation spectrum is highly similar to the spectrum of radium 226. It will not produce radon gas that is harmful to people when stored. It can replace the existing radioactive source radium 226 and is safe to use.

[0026] A calibrator for an exempted-level downhole natural gamma and energy spectrum instrument comprises a vertical shell 1, the shell 1 is a hollow cylindrical shape with upper and lower ends opened, an annular fixed frame 2 is arranged at the upper and lower ends of the shell 1, a plurality of fixed columns 3 are vertically arranged between the two fixed frames 2, the upper and lower ends of the fixed column 3 respectively penetrate the two fixed frames 2, and each fixed column 3 is fixedly connected to the fixed frame 2 through a positioning pin 4, and the plurality of fixed columns 3 are arranged around the shell 1 as the center circle, wherein the materials of the shell 1, the fixed frames 2 and the fixed columns 3 can use all non-metallic and metallic materials including lightweight, high-strength and high-radiation-transmitting materials, the number of the fixed columns 3 is not less than four, and six are most preferred, and the material thereof can be selected from lightweight metal materials such as aluminum and its alloys, and can be selected from polyethylene, nylon, polyester The film for energy spectrum instrument is not a radioactive source, and its radiation level is exempted. Its radiation spectrum is highly similar to the spectrum of radium 226, and it will not produce radon gas harmful to people in the storage state. It can replace the existing radioactive source radium 226, solve the problem of the radioactive source radium 226 currently used, is safe to use, and is easy to install, which is beneficial to the development of oil industry production. The outer shell 1 and the fixed frame 2 are connected and fixed by a fixed column 3, which is used to limit the relative position of the calibrator and the drilling instrument after the calibrator is installed on the drilling instrument, so as to not only ensure the accuracy of the calibrator parameters, but also facilitate the assembly of the calibrator and the fixation on the drilling instrument. At the same time, the calibrator can construct a uniform annular radiation field or a discontinuous specific radiation field by simulating the formation environment.

[0027] Furthermore, the housing 1 is a double-layer sleeve composed of a tile body nylon 11 and a tile surface nylon 12, the tile surface nylon 12 is sleeved on the outside of the tile body nylon 11, and a film is provided in the gap between the tile surface nylon 12 and the tile body nylon 11, and the film distribution can be uniform or uneven, wherein a film is also placed in the fixed column 3, and the upper and lower ends of the tile surface nylon 12 and the tile body nylon 11 are inserted in the fixed frame 2;

[0028] Furthermore, the fixed frame 2 is composed of an arc-shaped first frame 21 and a second frame 22 , and both ends of the first frame 21 and the second frame 22 are connected by bolts.

[0029] By configuring the fixed frame 2 as the first frame 21 and the second frame 22 , it is convenient for workers to disassemble and install the frame during maintenance.

[0030] Furthermore, a plurality of through holes 5 are evenly formed on the first frame 21 and the second frame 22 .

[0031] By setting the through hole 5, the mass and density of the calibrator device can be reduced, so that the device can be lowered into the well faster, wherein the shape of the through hole 5 is rectangular or circular.

[0032] In summary, the utility model provides the exemption-level film for the logging while drilling natural gamma and energy spectrum instrument, the radiation level belongs to the exemption level, the radiation spectrum is highly similar to the spectrum of radium 226, and no radon gas harmful to people is generated in the storage state, and the existing radioactive source radium 226 can be replaced, and the use is safe, so that the logging while drilling natural gamma and energy spectrum instrument can work under uniform and stable working conditions; the utility model provides the exemption-level calibrator for the logging while drilling natural gamma and energy spectrum instrument, which can be calibrated by using the above film, solves the problem of the difficulty of on-site calibration of logging while drilling, and is easy to install and use, which is beneficial to the development of oil industry production.

[0033] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An exemption-level while-drilling natural gamma and energy spectrum instrument calibrator, characterized by: The invention comprises a vertical shell (1), the shell (1) is in the shape of a hollow cylinder with upper and lower ends opened, the upper and lower ends of the shell (1) are both provided with annular fixed frames (2), a plurality of fixed columns (3) are vertically provided between two fixed frames (2), the upper and lower ends of the fixed columns (3) respectively penetrate the two fixed frames (2), and each of the fixed columns (3) is fixedly connected to the fixed frame (2) via a positioning pin (4), and the plurality of fixed columns (3) are all arranged around the shell (1) as a central circumference.

2. The exempted-level while-drilling natural gamma and energy spectrum instrument calibrator according to claim 1, characterized in that: The shell (1) is a double-layer sleeve composed of a nylon tile body (11) and a nylon tile surface (12); the nylon tile surface (12) is sleeved on the outside of the nylon tile body (11); a film is provided in the gap between the nylon tile surface (12) and the nylon tile body (11); the film is evenly distributed or unevenly distributed; the upper and lower ends of the nylon tile surface (12) and the nylon tile body (11) are both inserted into the fixed frame (2).

3. The exempted-level while-drilling natural gamma and energy spectrum instrument calibrator as claimed in claim 2, characterized in that: The fixed frame (2) is composed of a first arc-shaped frame (21) and a second frame (22) spliced ​​together, and both ends of the first frame (21) and the second frame (22) are connected by bolts.

4. The exempted-level while-drilling natural gamma and energy spectrum instrument calibrator as claimed in claim 3, characterized in that: A plurality of through holes (5) are evenly formed on the first frame (21) and the second frame (22).

5. The exempted-level while-drilling natural gamma and energy spectrum instrument calibrator as claimed in claim 4, characterized in that: The through hole (5) is in a rectangular or circular shape.

6. The exempted-level while-drilling natural gamma and energy spectrum instrument calibrator according to claim 1, characterized in that: The number of the fixing columns (3) is no less than four, and films are placed inside the fixing columns (3).

7. The exempted-level while-drilling natural gamma and energy spectrum instrument calibrator according to claim 1, characterized in that: The shell (1), the fixed frame (2) and the fixed column (3) are all made of lightweight, high-strength and high-radiation-transmittance materials.

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