Underground positioning device
By designing downhole positioning devices in drilling tools and using the combination of circuit modules and angle sensors, the problem of inaccurate positioning of salvage tools during drilling is solved, efficient and precise positioning and angle measurement of downhole drilling tools are achieved, and drilling operations are improved success rate and intelligence level.
Patent Information
- Application Number
- CN202421163425.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-27
AI Technical Summary
During the drilling process, existing salvage tools lack effective positioning devices, resulting in the inability to salvage the drilling tool or instrument or inaccurate positioning, and the success rate is low, especially in complex underground environments.
A downhole positioning device is designed, including a housing, a circuit module and a locking device arranged on the central tube column. The circuit module transmits information through wireless electromagnetic waves to position the position and angle of the salvaged object, and uses multiple uniformly distributed along the circumferential direction. Circuit modules and angle sensors, combined with locking devices and flow holes, enable precise positioning and angle measurement.
It improves the positioning accuracy and success rate of salvage tools, can accurately judge the position and angle of salvaged objects in harsh underground environments, and enhances the intelligence level of drilling operations.
Smart Images
Figure CN222276648U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of downhole measuring tools, and in particular relates to a downhole positioning device. Background Art
[0002] During the drilling process, the drilling tools or instruments are often broken due to geological conditions, improper operation or drilling tool problems. In order to ensure the smooth progress of subsequent drilling operations, the broken drilling tools or instruments in the well need to be salvaged.
[0003] High efficiency, accurate positioning and angle judgment are the keys to successful salvage. Some salvage tools do not have positioning devices, such as salvage hooks, which may result in failure to salvage. At present, the conventional U-shaped buckle inserts the drill pipe into the buckle and then lifts it out of the wellhead. During the salvage process, the bottom of the well cannot be seen, positioning is impossible, and salvage can only be carried out by feeling, with a low success rate. Some salvage tools are equipped with positioning devices, but the positioning devices are not sensitive, and the complex underground environment leads to inaccurate positioning, which affects the operation and produces failure reactions.
[0004] Therefore, there is an urgent need to develop a salvage and positioning device with a stable structure, reliable performance and easy operation. Utility Model Content
[0005] In view of the technical problems mentioned above, the utility model aims to provide a downhole positioning device, which can accurately locate the position and angle of downhole instruments in harsh drilling environments and determine the inclination angle of salvaged objects relative to the downhole positioning device.
[0006] According to the utility model, a downhole positioning device is provided, which is arranged on a central pipe column and includes:
[0007] A housing disposed outside the center column;
[0008] a plurality of circuit modules uniformly arranged in the housing along a circumferential direction, wherein the circuit modules are configured to measure an inclination angle of the salvaged object relative to the central column; and
[0009] A locking device is provided to fix the housing to the center column.
[0010] In a specific embodiment, a positioning hole is provided at the lower portion of the housing, and the positioning hole connects the circuit module with the outside of the housing.
[0011] In a specific embodiment, a flow hole is axially penetrated in the housing.
[0012] In a specific embodiment, a plurality of flow holes are evenly arranged in the shell along a circumferential direction.
[0013] In a specific embodiment, the flow hole is disposed between the circuit module and the central tube column.
[0014] In a specific embodiment, the outer shell is coaxially sleeved on the outer side of the central tube column, the upper end of the outer shell is axially abutted against the central tube column, the locking device is fixedly arranged on the lower end of the central tube column, and the upper end of the locking device is axially abutted against the lower end of the outer shell.
[0015] In a specific embodiment, the locking device includes an upper joint configured to be fixedly connected to the central pipe column, and a lower joint is provided at the lower end of the upper joint.
[0016] In a specific embodiment, the circuit module includes a transmitting coil for transmitting information to a ground locator in the form of radio electromagnetic waves.
[0017] In a specific embodiment, after the circuit module detects the salvaged object, the indicator light in the corresponding ground locator will light up. According to the order of the lights on, it can be determined that the salvaged object is located at the circuit module closest to it, thereby measuring the inclination angle of the salvaged object relative to the central column.
[0018] In a specific embodiment, the circuit module includes an angle sensor for measuring the inclination angle of the central column relative to the ground.
[0019] Compared with the prior art, the advantages of the present application are as follows.
[0020] The utility model is provided with a plurality of circuit modules evenly distributed along the circumferential direction. When the circuit modules detect the salvaged object, the indicator lights in the corresponding ground locator will light up. According to the sequence of lighting up, it can be judged which circuit module the salvaged object is closer to, thereby judging the position and angle of the salvaged object relative to the center pipe column, and providing help for subsequent salvage operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The utility model will be described below with reference to the accompanying drawings.
[0022] Figure 1 A schematic diagram showing an embodiment of a downhole positioning device according to the utility model;
[0023] Figure 2 A cross-sectional schematic diagram of a downhole positioning device according to the utility model is shown;
[0024] Figure 3 A three-dimensional schematic diagram showing an embodiment of a downhole positioning device according to the utility model;
[0025] Figure 4A schematic diagram showing an embodiment of a protective cover according to the utility model is shown.
[0026] In the figure:
[0027] 1. Outer shell; 2. Positioning hole; 3. Locking device; 31. Upper joint; 32. Lower joint; 4. Circuit module; 5. Protective cover; 6. Flow hole; 7. Center column; 8. Location of circuit module; 100. Downhole positioning device.
[0028] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present utility model and are not drawn according to the actual scale. DETAILED DESCRIPTION
[0029] The utility model is introduced below by means of the accompanying drawings.
[0030] It should be noted that the directional terms or qualifiers "upper", "lower", "front", "back", "left", "right", etc. used in this application are all relative to the referenced Figure 1 They are not intended to define the absolute positions of the components involved, but may vary depending on the specific circumstances.
[0031] Figure 1 The structure of the downhole positioning device 100 according to the utility model is shown. Figure 1 As shown, the downhole positioning device 100 is arranged on a central pipe column 7 and includes a housing 1 , a circuit module 4 and a locking device 3 .
[0032] like Figure 1 to Figure 3 As shown, in this embodiment, the outer shell 1 is constructed to be generally cylindrical in shape as a whole, and the outer shell 1 is coaxially sleeved on the outer side of the central pipe column 7.
[0033] In a preferred embodiment, the housing is made of insulating material to avoid attenuation of the transmission signal caused by metal materials.
[0034] Multiple circuit modules 4 are evenly arranged in the circumferential direction in the housing 1, and the circuit modules 4 are configured to measure the inclination angle of the salvaged object relative to the central pipe column 7. Specifically, the circuit modules 4 are buried inside the housing 1, which can prevent the circuit modules 4 from being worn by objects underground.
[0035] In a specific embodiment, the circuit module 4 includes a transmitting coil for transmitting information to the ground locator in the form of radio electromagnetic waves.
[0036] After the circuit module 4 detects the salvaged object, the indicator light in the corresponding ground locator will light up. According to the order of the lights, the circuit module 4 closest to the salvaged object can be determined, thereby measuring the inclination angle of the salvaged object relative to the central column 7.
[0037] According to the utility model, the circuit module 4 also includes an angle sensor for measuring the inclination angle of the center column 7 relative to the ground. The circuit module 4 closest to the location of the salvaged object is determined according to the order of the lights on, and the inclination angle of the salvaged object relative to the center column 7 (downhole positioning device 100) is measured. The inclination angle of the center column 7 relative to the ground is measured by the angle sensor, and the inclination angle of the salvaged object relative to the ground can be obtained.
[0038] In a preferred embodiment, the circuit module 4 adopts a unique probe original design, including a rotation angle sensor and a digital temperature sensor, which can reliably measure the inclination, orientation and temperature information of the drilling tool while drilling. The measurement results are transmitted to the ground in the form of radio electromagnetic waves, generating a magnetic field distribution similar to a magnetic dipole source for the ground receiver to receive, so that the operator can search and locate the underground drilling tool.
[0039] In a specific embodiment, 16 circuit modules 4 are evenly arranged in the housing 1 along the circumferential direction, and real-time measurement is performed without blind spots. The utility model breaks through the limitations of traditional drilling measurement and salvage devices, integrates the two functions of inclination measurement and positioning, solves the two major problems that have always plagued underground drilling, and greatly improves the intelligence level of drilling positioning.
[0040] The locking device 3 fixes the housing 1 and the central column 7 , that is, the locking device 3 can connect the housing 1 and the central column 7 .
[0041] In a specific embodiment, the locking device 3 includes an upper joint 31 configured to be fixedly connected to the center column 7, and a lower joint 32 is provided at the lower end of the upper joint 31. After the housing 1 is coaxially sleeved on the outer side of the center column 7, the upper end of the housing 1 axially abuts against the center column 7, and the upper joint 31 of the locking device 3 is fixedly arranged on the lower end of the center column 7 by threaded connection, and the upper end of the locking device 3 axially abuts against the lower end of the housing 1. Through this arrangement, the housing 1 is fixedly arranged on the outer side of the center column 7 by the locking device 3. Under this arrangement, the housing 1 can be installed on different center columns 7 through the locking device 3.
[0042] The utility model has a small positioning volume and a simple structure. The outer shell 1 is adapted to the central pipe column 7 through the locking device 3, and can be installed on the central pipe column 7 of most drilling tools.
[0043] According to the utility model, in a preferred embodiment, a positioning hole 2 is provided at the lower part of the housing 1, and the positioning hole 2 connects the circuit module 4 with the outside of the housing 1. Under this setting, the positioning hole 2 can strengthen the transmission of signals from the circuit module 4 to the outside, thereby improving the test accuracy.
[0044] In a preferred embodiment, a flow hole 6 is axially provided in the housing 1. The flow hole 6 can prevent mud overflow or particles in the mud from wearing the downhole positioning device 100 during the lowering process.
[0045] In this embodiment, a plurality of flow holes 6 are evenly arranged in the housing 1 along the circumferential direction. Figure 2 and Figure 3 As shown, three flow holes 6 are arranged at intervals along the circumferential direction in the housing 1. The flow holes 6 are arranged between the circuit module 4 and the central pipe column 7, which effectively solves the related problems caused by mud circulation.
[0046] In a preferred embodiment, a protective cover 5 is provided outside the housing 1 to protect the housing 1 .
[0047] During operation, the downhole positioning device 100 is fixed and lowered to the bottom of the well together with the salvage device along with the pipe string. During the drilling process, the circuit module 4 obtains the status and parameter information of the drill bit in real time, and the positioning and depth are determined according to the signal strength and distribution information. The results are transmitted to the ground positioning instrument for analysis and processing by ground technicians.
[0048] The circuit module 4 is composed of an angle sensor, a signal processing and transmission unit, a battery, etc., and is used to measure the inclination angle, face angle and other parameters of the drilling tool. On the one hand, the transmission parameters can be analyzed, and on the other hand, the downhole circuit module 4 can be positioned according to the strength distribution of the signal. When in the corresponding position of the salvaged object, if there is an inclination angle between the downhole positioning device 100 and the salvaged object, the circuit module 4 closest to the salvaged object will sense it through the light source and release a signal to the ground positioning device, thereby measuring the corresponding face angle, inclination angle, fixed depth and other information.
[0049] In the description of the present utility model, it should be understood that 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0050] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0052] Finally, it should be noted that the above is only a preferred embodiment of the utility model and does not constitute any limitation to the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A downhole positioning device, arranged on a central pipe column (7), characterized in that: include: A housing (1) disposed outside the central column (7); a plurality of circuit modules (4) uniformly arranged in the circumferential direction in the housing (1), the circuit modules (4) being configured to be able to measure the inclination angle of the salvaged object relative to the central pipe column (7); and A locking device (3), wherein the locking device (3) fixes the outer shell (1) and the central column (7).
2. The downhole positioning device according to claim 1, characterized in that: A positioning hole (2) is provided at the lower part of the housing (1), and the positioning hole (2) connects the circuit module (4) with the outside of the housing (1).
3. The downhole positioning device according to claim 1, characterized in that: A flow hole (6) is axially penetrated in the housing (1).
4. The downhole positioning device according to claim 3, characterized in that: A plurality of flow holes (6) are evenly arranged in the housing (1) along the circumferential direction.
5. The downhole positioning device according to claim 4, characterized in that: The flow hole (6) is arranged between the circuit module (4) and the central tube column (7).
6. The downhole positioning device according to claim 1, characterized in that: The outer shell (1) is coaxially sleeved on the outer side of the central tube column (7), the upper end of the outer shell (1) is axially abutted against the central tube column (7), the locking device (3) is fixedly arranged on the lower end of the central tube column (7), and the upper end of the locking device (3) is axially abutted against the lower end of the outer shell (1).
7. The downhole positioning device according to claim 6, characterized in that: The locking device (3) comprises an upper joint (31) configured to be fixedly connected to the central pipe column (7), and a lower joint (32) is provided at the lower end of the upper joint (31).
8. The downhole positioning device according to any one of claims 1 to 7, characterized in that: The circuit module (4) comprises a transmitting coil for transmitting information to a ground locator in the form of radio electromagnetic waves.
9. The downhole positioning device according to claim 8, characterized in that: After the circuit module (4) detects the salvaged object, the indicator lights in the corresponding ground locator will light up. According to the order of the lights on, it can be determined that the salvaged object is located at the circuit module (4) closest to it, thereby measuring the inclination angle of the salvaged object relative to the central column (7).
10. The downhole positioning device according to claim 9, characterized in that: The circuit module (4) comprises an angle sensor for measuring the inclination angle of the central column (7) relative to the ground.