Cable measurement type well deviation azimuth logging instrument
By using the protective components and high-precision sensors of the cable-mounted well inclination and azimuth logging tool, the problems of low measurement accuracy and poor impact resistance in the existing technology have been solved, achieving higher measurement accuracy and anti-interference capability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN SHENGXIN ENERGY TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-28
AI Technical Summary
Existing wellbore azimuth logging tools have low measurement accuracy, poor structural protection, poor impact resistance, and are susceptible to electromagnetic interference.
The cable-mounted wellbore azimuth logging tool includes protective components and a shielding layer. It uses a high-precision gravity accelerometer and fluxgate magnetometer for triaxial measurements. Combined with an elastic buffer structure and a titanium alloy shell, it enhances the resistance to impact and magnetic interference.
It improves measurement accuracy, enhances shock resistance, reduces mechanical vibration and magnetic interference, and adapts to complex downhole environments.
Smart Images
Figure CN224174076U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of well inclination and azimuth logging equipment, and in particular to a cable-mounted well inclination and azimuth logging instrument. Background Technology
[0002] A wellbore inclination and azimuth logging tools are downhole measurement tools used in oil, gas, or geological exploration. They are mainly used to monitor the wellbore inclination angle (wellbore tilt) and azimuth angle (wellbore horizontal direction) in real time to ensure that the drilling trajectory meets design requirements. Generally, current wellbore inclination and azimuth logging tools have drawbacks such as low measurement accuracy, poor structural protection, poor impact resistance, and susceptibility to electromagnetic interference. This application proposes a cable-mounted wellbore inclination and azimuth logging tool to solve the above-mentioned problems. Utility Model Content
[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a cable-mounted well inclination azimuth logging tool.
[0004] This utility model provides a cable-mounted well inclination and azimuth logging tool, including a shell, inside which a thermos bottle is fixedly installed. Inside the thermos bottle are a protective component and an electronic module, with the electronic module located below the protective component. Inside the protective component is a sensor unit for monitoring the well inclination and azimuth angles of the well. The sensor unit is electrically connected to the electronic module for processing, packaging, and transmitting the monitored data.
[0005] The protective component includes an elastic buffer structure and a shielding layer. The shielding layer is fixedly wrapped around the outer periphery of the sensor unit, and the elastic buffer structure is fixedly wrapped around the outer periphery of the shielding layer. The elastic buffer structure is compressed inside the thermos bottle.
[0006] Furthermore, the sensor unit includes a fluxgate magnetometer, a temperature sensor, and two gravity accelerometers; one of the gravity accelerometers measures the X axis, and the other gravity accelerometer measures the Y and Z axes.
[0007] Furthermore, the electronic module includes a circuit board on which a data acquisition and processing module, an MCU control module, a transmission and communication module, and a power supply module are integrated; the MCU control module is electrically connected to the data acquisition and processing module, the transmission and communication module, and the power supply module; the sensor unit is electrically connected to the data acquisition and processing module.
[0008] Furthermore, the outer shell is made of titanium alloy.
[0009] Furthermore, the elastic buffer structure is made of high-temperature rubber material.
[0010] Furthermore, the shielding layer is a permalloy shielding layer.
[0011] Furthermore, protective plugs and protective caps are respectively spirally connected at both ends of the outer shell.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] This utility model's cable-operated well inclination and azimuth logging tool employs protective components to safeguard the sensor unit's installation. An elastic buffer structure absorbs impacts, preventing mechanical vibration interference and enhancing impact resistance, allowing it to adapt to more complex logging environments. Furthermore, a shielding layer reduces magnetic interference and improves measurement accuracy. The sensor unit utilizes two accelerometers to achieve X, Y, and Z-axis measurements. High-precision accelerometers and fluxgate magnetometers are employed to achieve data fusion and mutual calibration, further improving measurement accuracy.
[0014] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0015] 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:
[0016] Figure 1 A cross-sectional structural schematic diagram of a cable-mounted well inclination azimuth logging tool provided for an embodiment of this utility model;
[0017] Figure 2 This is a schematic diagram of the electronic module.
[0018] Figure 3 This is a flowchart of the logging tool signal flow.
[0019] The following components are labeled in the diagram: 1. Outer shell; 2. Thermos bottle; 3. Protective components; 31. Elastic buffer structure; 32. Shielding layer; 4. Electronic module; 41. Circuit board; 42. Data acquisition and processing module; 43. Transmission and communication module; 44. MCU control module; 45. Power supply module; 5. Sensor unit; 51. Fluxgate magnetometer; 52. Gravity accelerometer; 53. Temperature sensor; 6. Protective plug; 7. Protective cap. Detailed Implementation
[0020] 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.
[0021] 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.
[0022] Please refer to Figures 1-3 This utility model provides a cable-mounted well inclination and azimuth logging tool, including a housing 1. A thermos flask 2 is fixedly installed inside the housing 1. A protective component 3 and an electronic module 4 are installed inside the thermos flask 2. The electronic module 4 is located below the protective component 3. A sensor unit 5 for monitoring the well inclination and azimuth angles of the well is installed inside the protective component 3. The sensor unit 5 is electrically connected to the electronic module 4 to process, package, and transmit the monitored data.
[0023] The outer shell 1 and the thermos bottle 2 are designed to withstand the high temperature and high pressure environment downhole. The thermos bottle 2 prevents the high temperature inside the well from being conducted into the bottle, thereby protecting the normal operation of the electronic module 4 and enhancing its stability. The two ends of the outer shell 1 are respectively threaded with protective plugs 6 and protective caps 7.
[0024] In a preferred embodiment, the protective component 3 includes an elastic buffer structure 31 and a shielding layer 32. The shielding layer 32 is fixedly wrapped around the outer periphery of the sensor unit 5, and the elastic buffer structure 31 is fixedly wrapped around the outer periphery of the shielding layer 32. The elastic buffer structure 31 is squeezed and disposed inside the thermos bottle 2.
[0025] The shielding layer 32 enhances the anti-interference design and reduces magnetic interference; the elastic buffer structure 31 absorbs the impact on the sensor unit 5, avoids mechanical vibration interference, enhances shock resistance, and reduces the impact of the external environment on measurement accuracy.
[0026] In a preferred embodiment, the sensor unit 5 includes a fluxgate magnetometer 51, a temperature sensor 53, and two gravity accelerometers 52; one gravity accelerometer 52 is used for single-axis measurement X, and the other gravity accelerometer 52 is used for dual-axis measurement Y and Z.
[0027] Among them, the fluxgate magnetometer 51 and the gravity accelerometer 52 adopt high-precision integrated chips and directly digitally output the required measurement values of each parameter;
[0028] The sensor unit 5 uses a single-crystal silicon flexible structure for its gravity accelerometer 52 and fluxgate magnetometer 51. After welding, it is fixed with silicone and protected with conformal coating to reduce the impact of the external environment on the measurement accuracy.
[0029] Furthermore, the sensor unit 5's gravity accelerometer 52 and fluxgate magnetometer 51 have digital outputs, avoiding the attenuation of analog signals and other electromagnetic interference from affecting measurement accuracy;
[0030] This application selects a high-precision gravity accelerometer 52 and a fluxgate magnetometer 51. The two gravity accelerometers 52 in this technical solution are used for measuring gravity components (X-axis) and calculating well inclination angles (Y and Z-axis), respectively. The fluxgate magnetometer 51 is used to detect the direction of the geomagnetic field and determine the azimuth angle. The main core features of the gravity accelerometer 52 and the fluxgate magnetometer 51 are:
[0031] 1. Triaxial measurement capability: Typically, it includes three mutually perpendicular accelerometers to measure the gravitational components in the X, Y, and Z directions respectively; this application uses only two gravity accelerometers 52 to achieve triaxial measurement capability, reducing installation space;
[0032] 2. High-precision measurement: The gravity accelerometer has a resolution of up to 0.01° well inclination angle, a dynamic range of ±1g to ±5g, good temperature stability, and can adapt to high-temperature downhole environments;
[0033] 3. Orientation measurement principle: The orientation of the tool face is calculated by the gravity component, and combined with the magnetometer data, the magnetic orientation and gravity tool face can be provided.
[0034] Installation layout of gravity accelerometer 52 and fluxgate magnetometer 51 inside the probe:
[0035] 1. Installation Layout Principles
[0036] Orthogonal triaxial layout: Both the gravity accelerometer 52 and the fluxgate magnetometer 51 are orthogonally mounted on three axes (X, Y, Z axes) to ensure that vector components can be measured in all dimensions.
[0037] Coaxial alignment: The corresponding axes (such as X-axis to X-axis) of the gravity accelerometer 52 and the fluxgate magnetometer 51 must be strictly parallel to avoid cross-axis errors.
[0038] Centralized installation: The sensor in the sensor unit is placed as close as possible to the geometric center of the probe to reduce centrifugal force interference during rotation.
[0039] 2. Specific installation layout
[0040] (1) Layout of Gravity Accelerometer 52
[0041] Z-axis: Aligned with the probe axis (wellbore axis), used to measure the axial gravity component.
[0042] X and Y axes: Perpendicular to the Z axis and orthogonal to each other, measuring the lateral gravity component (used to calculate well inclination and tool face angle).
[0043] Installation requirements:
[0044] The zero bias (output under zero gravity) and scaling factor (sensitivity) need to be calibrated.
[0045] (2) Layout of fluxgate magnetometer 51
[0046] Three-axis orthogonality: The X, Y, and Z axes are parallel to the corresponding axes of the gravity accelerometer 52, and the components of the geomagnetic field in the three directions are measured respectively.
[0047] Installation requirements:
[0048] Keep away from sources of magnetic interference (such as motors and ferrous materials).
[0049] Hard magnetic / soft magnetic interference compensation is required (e.g., eliminating the influence of the probe's own magnetic field through calibration).
[0050] (3) Relative positional relationship
[0051] Coaxial alignment: The X, Y, and Z axes of the gravity accelerometer 52 and the fluxgate magnetometer 51 must correspond and be parallel (e.g., the X-axis of the gravity accelerometer 52 is parallel to the X-axis of the fluxgate magnetometer 51).
[0052] Compact layout: The two sets of sensors are placed as close as possible without interfering with each other, ensuring consistent measurement points and reducing errors caused by wellbore curvature.
[0053] In a preferred embodiment, the electronic module 4 includes a circuit board 41, on which a data acquisition and processing module 42, an MCU control module 44, a transmission and communication module 43, and a power module 45 are integrated; the MCU control module 44 is electrically connected to the data acquisition and processing module 42, the transmission and communication module 43, and the power module 41; the sensor unit 5 is electrically connected to the data acquisition and processing module 42.
[0054] The data acquisition and processing module 42 is used to acquire various data parameters monitored by the sensor unit, process them, and then send them to the MCU control module 44.
[0055] MCU control module 44 is used to package data from data acquisition and processing module 42 into data frames;
[0056] The transmission communication module 43 is used to transmit the data frames packaged by the MCU control module 44 to the ground.
[0057] Power module 45 is used to power the other modules;
[0058] The data signal flow is as follows: the fluxgate magnetometer 51 and the gravity accelerometer 52 adopt high-precision integrated chips to directly output the required measurement values of each parameter digitally. After the data is processed by the algorithm of the data acquisition and processing module 42, it is transmitted to the MCU control module 44 to package data frames, and then sent to the data transmission and communication module 43 to be uploaded to the ground.
[0059] In a preferred embodiment, the outer shell 1 is made of titanium alloy, which has good corrosion resistance and impact resistance.
[0060] In a preferred embodiment, the elastic buffer structure 31 is made of high-temperature rubber material.
[0061] In a preferred embodiment, the shielding layer 31 is a permalloy shielding layer.
[0062] 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.
[0063] 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.
[0064] 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 cable-operated wellbore azimuth logging tool, characterized in that, The device includes an outer shell, inside which a thermos is fixedly installed. Inside the thermos is a protective component and an electronic module. The electronic module is located below the protective component. Inside the protective component is a sensor unit for monitoring the well inclination angle and azimuth angle of the well. The sensor unit is electrically connected to the electronic module and is used to process, package, and transmit the monitored data. The protective component includes an elastic buffer structure and a shielding layer. The shielding layer is fixedly wrapped around the outer periphery of the sensor unit, and the elastic buffer structure is fixedly wrapped around the outer periphery of the shielding layer. The elastic buffer structure is compressed inside the thermos bottle.
2. The cable-operated wellbore azimuth logging tool according to claim 1, characterized in that, The sensor unit includes a fluxgate magnetometer, a temperature sensor, and two gravity accelerometers; one of the gravity accelerometers measures the X axis, and the other gravity accelerometer measures the Y and Z axes.
3. The cable-operated wellbore azimuth logging tool according to claim 1, characterized in that, The electronic module includes a circuit board on which a data acquisition and processing module, an MCU control module, a transmission and communication module, and a power supply module are integrated. The MCU control module is electrically connected to the data acquisition and processing module, the transmission and communication module, and the power supply module. The sensor unit is electrically connected to the data acquisition and processing module.
4. The cable-operated wellbore azimuth logging tool according to claim 1, characterized in that, The outer shell is made of titanium alloy.
5. The cable-operated wellbore azimuth logging tool according to claim 1, characterized in that, The elastic buffer structure is made of high-temperature rubber material.
6. The cable-operated wellbore azimuth logging tool according to claim 1, characterized in that, The shielding layer is made of permalloy.
7. The cable-operated wellbore azimuth logging tool according to claim 1, characterized in that, The two ends of the outer shell are respectively spirally connected with protective plugs and protective caps.