Storage type gamma magnetic positioning combined logging instrument

Abstract

The utility model discloses a storage type gamma magnetic positioning combined logging instrument which comprises a shell, a thermos bottle and a CCL magnetic detection assembly are fixedly arranged in the shell, and a gamma detection assembly and a circuit module are arranged in the thermos bottle and used for collecting, processing and storing gamma data and CCL signal data. The gamma detection assembly is arranged below the circuit module; the gamma detection assembly and the CCL magnetic detection assembly are electrically connected with the circuit module. The two ends of the shell are provided with a protective cap and a protective plug in a threaded connection mode respectively. According to the storage type gamma magnetic positioning combination logging instrument, the two logging units of the gamma energy spectrum instrument and the CCL instrument are designed and combined into one logging unit, the length of the instrument is shortened, the logging construction risk is greatly reduced, the pumping-out or direct pushing technology is adopted, real-time data storage is achieved in the logging process, and the logging efficiency is improved. The defects existing in cable type logging are well overcome.

Description

Technical Field

[0001] This utility model relates to the field of logging instrument technology, and in particular to a storage-type gamma magnetic positioning combined logging instrument. Background Technology

[0002] Currently, logging instruments are generally divided into two main categories: cable logging and pump-out storage logging; among them,

[0003] Cable logging is mainly used in conventional oilfield logging operations. It has advantages such as simple construction, fast timeliness, and real-time observation of logging data. However, in complex well conditions, the instrument string is prone to obstruction and jamming, which can cause serious damage to the instrument and result in significant economic losses. In horizontal well conditions, the instrument cannot be lowered to the bottom of the well.

[0004] Pump-out storage logging is generally used in complex oil wells and horizontal wells. It mainly delivers the instrument through the drill pipe, which plays a certain role in protecting the instrument and can reach any well depth with the drill pipe.

[0005] Traditional instrument logging uses CCL and gamma spectroscopy as two separate logging units, which increases the length of the instrument string, increases the manufacturing cost of the instrument, and also brings great risks to logging operations.

[0006] The present application proposes a storage-type gamma magnetic positioning combined logging tool that combines two logging units, a gamma spectroscopy instrument and a CCL instrument, into one logging unit. It adopts a pump-out or direct-push process and realizes real-time data storage during logging, which effectively solves the shortcomings of cable logging. Utility Model Content

[0007] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a storage-type gamma magnetic positioning combined logging tool.

[0008] This utility model provides a storage-type gamma magnetic positioning combined logging tool, including a shell. A thermos and a CCL magnetic detection component are fixedly installed inside the shell. The CCL magnetic detection component is located inside the shell and above the outside of the thermos. Inside the thermos, a gamma detection component and a circuit module are installed for acquiring, processing, and storing gamma data and CCL signal data. The gamma detection component is located below the circuit module, and both the gamma detection component and the CCL magnetic detection component are electrically connected to the circuit module. Protective caps and protective plugs are respectively threaded onto both ends of the shell.

[0009] Furthermore, the gamma detection assembly includes a photomultiplier tube and a detector crystal fixedly disposed inside the thermos bottle, wherein the photomultiplier tube and the detector crystal are electrically connected.

[0010] Furthermore, the detector uses a NaI crystal.

[0011] Furthermore, the CCL magnetic detection component includes two permanent magnets fixedly disposed inside the housing, and an inductor coil is fixedly disposed inside the housing between the two permanent magnets.

[0012] Furthermore, the circuit module includes a circuit board, on which a preamplifier and shaping module, an AD conversion module, an MCU control data fusion module, a data storage module, and a CCL signal amplification, filtering, and shaping module are integrated.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model's storage-type gamma magnetic positioning combined logging instrument combines two logging units, a gamma energy spectrum instrument and a CCL instrument, into one logging unit, shortening the instrument length and greatly reducing the risk of logging operations. It adopts pump-out or direct-push technology and realizes real-time data storage during logging, which effectively solves the shortcomings of cable-type logging.

[0015] Furthermore, the circuit module in the technical solution of this application integrates circuits such as data filtering and processing, which greatly improves the key signal processing capabilities.

[0016] It should be understood that the content described in the utility model description section is not intended to limit the key or important features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model.

[0017] Other features of this invention will become readily apparent from the following description. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 A schematic diagram of the internal structure of a storage-type gamma magnetic positioning combined logging tool provided in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the circuit module.

[0021] Figure 3 System block diagram of a storage-type gamma magnetic positioning combined logging tool;

[0022] The following components are labeled in the diagram: 1. Outer shell; 2. Thermos bottle; 3. Gamma detection component; 31. Photomultiplier tube; 32. Crystal for detector; 4. CCL magnetic detection component; 41. Permanent magnet; 42. Inductor coil; 5. Circuit module; 51. Circuit board; 52. Preamplifier and shaping module; 53. AD conversion module; 54. MCU control data fusion module; 55. Data storage module; 56. CCL signal amplification, filtering, and shaping module; 6. Protective cap; 7. Protective plug. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Please refer to Figures 1-3 This utility model provides a storage-type gamma magnetic positioning combined logging tool, including a shell 1. A thermos bottle 2 and a CCL magnetic detection component 4 are fixedly arranged inside the shell 1. The CCL magnetic detection component 4 is arranged inside the shell 1 and located above the outside of the thermos bottle 2. A gamma detection component 3 and a circuit module 5 are arranged inside the thermos bottle 2 for the acquisition, processing and storage of gamma data and CCL signal data.

[0026] The gamma detection component 3 is located below the circuit module 5. Both the gamma detection component 3 and the CCL magnetic detection component 4 are electrically connected to the circuit module 5. In addition, the gamma detection component 3 and the CCL magnetic detection component 4 are kept at a certain distance from the circuit module 5 to avoid being affected by the magnetic field. The two ends of the outer shell 1 are respectively provided with protective caps 6 and protective plugs 7 by threaded connection.

[0027] The thermos bottle 2 has an internal frame, on which the gamma detection component 3 and circuit module 5 are fixed, making full use of the internal space and helping to shorten the length of the logging instrument.

[0028] In a preferred embodiment, the gamma detection component 3 includes a photomultiplier tube 31 and a detector crystal 32 fixedly disposed on the internal frame of the thermos bottle 2, wherein the photomultiplier tube 31 and the detector crystal 32 are electrically connected.

[0029] Preferably, the detector crystal 32 is made of NaI crystal.

[0030] Radioactive elements in the strata emit gamma-ray spectrum rays, which are captured by gamma detection component 3 and converted into electrical signals. After processing, a gamma spectrum curve (GR curve) is generated.

[0031] The principle is as follows: Different formations in the well contain different mineral elements, so the intensity and count rate of the natural gamma spectrum emitted in each formation are also different; radioactive gamma spectrum rays of different energy intensities are converted into photon signals by the detector of the natural gamma spectrum logging tool using crystal 32, and the photon signals are amplified by photomultiplier tube 31PMT and converted into electrical pulse signals of different amplitudes. The formations are identified and distinguished by statistically analyzing the count rate of the gamma spectrum rays.

[0032] In a preferred embodiment, the CCL magnetic detection component 4 includes two permanent magnets 41 fixedly disposed on the inner wall of the housing 1, and an inductor coil 42 fixedly disposed between the two permanent magnets 41 inside the housing 1.

[0033] The permanent magnet 41 and inductor coil 42 in the CCL magnetic detection component 4 are actively magnetized by the sleeve. Changes in the thickness or material at the coupling will cause distortion of the magnetic field distribution, resulting in pulse changes in the electromotive force of the inductor coil 42, which is the CCL primary signal, and is subsequently amplified and filtered for acquisition.

[0034] Among them, the photomultiplier tube 31, the detector crystal 32 and the circuit board 51 can all be fixed to the frame inside the thermos bottle 2 by screw thread; the permanent magnet 41 and the inductor coil 42 can all be fixed inside the outer shell 1 by bracket or support plate.

[0035] In a preferred embodiment, the circuit module 5, also known as an integrated controller, is used to process and store gamma data and CCL signal data. It includes a circuit board 51, on which are integrated a preamplifier and shaping module 52, an AD conversion module 53, an MCU control data fusion module 54, a data storage module 55, and a CCL signal amplification, filtering, and shaping module 56. The gamma detection component 3 is electrically connected to the preamplifier and shaping module 52, the preamplifier and shaping module 52 is electrically connected to the AD conversion module 53, the AD conversion module 53 is electrically connected to the MCU control data fusion module 54, the MCU control data fusion module 54 is electrically connected to the data storage module 55, the CCL magnetic detection component 4 is electrically connected to the CCL signal amplification, filtering, and shaping module 56, and the CCL signal amplification, filtering, and shaping module 56 is electrically connected to the AD conversion module 53, thus enabling the processing and storage of gamma data and CCL signal data.

[0036] Furthermore, the circuit board 51 mainly introduces functional module circuits, such as other power supply circuits, which are conventional technical means well known to those skilled in the art. Based on the above introduction, those skilled in the art can fully understand and implement the relevant functions of the circuit module, so there is no need to elaborate further.

[0037] The preamplifier and shaping module 52 includes a preamplifier circuit and a shaping circuit, which are used to amplify, shape and filter the signal.

[0038] The AD conversion module 53 is mainly used to convert analog signals into digital signals;

[0039] The MCU control data fusion module 54 includes an MCU control circuit and a data fusion circuit, which is used to collect the data after AD conversion and then fuse and package the data.

[0040] Data storage module 55 is mainly used to store the packaged data;

[0041] The CCL signal amplification, filtering, and shaping module 56 includes an amplification circuit, a filtering circuit, and a shaping circuit. It adds digital filtering to the CCL signal, uses software dynamic threshold adjustment to adapt to the needs of bushings of different materials, and adopts a multi-coil design to improve the positioning resolution of the coupling.

[0042] By combining the gamma spectrum curve with the CCL signal and matching the clamping depth with the gamma spectrum characteristics, high-precision depth correction is achieved.

[0043] The working principle of this utility model is as follows:

[0044] The gamma detection component 3, the CCL magnetic detection component 4, and the circuit module 5 are all integrated into a logging unit. The gamma detection component 3 is responsible for collecting the gamma energy spectrum of radioactive elements in the formation. The gamma energy spectrum is captured by the gamma detection component 3 and converted into an electrical signal. The pre-amplification and shaping module 52 is responsible for amplifying, shaping, and filtering the electrical signal. The CCL signal amplification, filtering, and shaping module 56 processes the pulse signal generated by the CCL coil sensing the change in casing wall thickness to increase the pulse signal intensity and eliminate noise. Then, the analog signals of the gamma energy spectrum and CCL are converted into digital signals (recording count rate / energy spectrum, CCL pulse) by the AD conversion module 53. After the MCU collects the data, it aligns, fuses, and packages the gamma energy spectrum data and CCL pulse signal. Finally, the packaged data is transmitted to the data storage module 55.

[0045] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stored gamma magnetic positioning combination logging instrument, characterized in that, The application relates to a portable gamma and CCL (criticality) dual-probe device, which comprises a shell, a thermos bottle and a CCL magnetic detection assembly fixed in the interior of the shell, wherein the CCL magnetic detection assembly is arranged above the thermos bottle in the interior of the shell; a gamma detection assembly and a circuit module are arranged in the interior of the thermos bottle and used for realizing the collection, processing and storage of gamma data and CCL signal data; the gamma detection assembly is arranged below the circuit module; the gamma detection assembly and the CCL magnetic detection assembly are electrically connected with the circuit module; and a protective cap and a protective plug are respectively arranged at two ends of the shell through threaded connection.

2. The stored gamma magnetic positioning combination logging instrument according to claim 1, characterized in that, The gamma detection assembly comprises a photomultiplier tube and a detector crystal fixed in the interior of the thermos bottle, and the photomultiplier tube is electrically connected with the detector crystal.

3. The stored gamma magnetic positioning combination logging instrument of claim 2, wherein, The detector crystal is a NaI crystal.

4. The stored gamma magnetic positioning combination logging instrument of claim 1, wherein, The CCL magnetic detection assembly comprises two permanent magnets fixed in the interior of the shell, and an inductor coil is fixed in the interior of the shell between the two permanent magnets.

5. The stored gamma magnetic positioning combination logging instrument of claim 1, wherein, The circuit module comprises a circuit board, and a pre-amplification shaping module, an AD conversion module, an MCU control data fusion module, a data storage module and a CCL signal amplification filtering shaping module are integrally arranged on the circuit board.

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