Well drilling leakage high-precision positioning device
By adopting a multi-section drill string and mounting cylinder structure in the well leakage location device, rapid sensor replacement and maintenance are achieved, solving the problem of difficult maintenance of traditional devices, reducing costs, and improving detection accuracy and device stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU UNIV
- Filing Date
- 2025-06-13
- Publication Date
- 2026-04-24
AI Technical Summary
Existing high-precision well leakage location devices for drilling are difficult and costly to replace and repair when the sensors are damaged, requiring multiple backup devices to be prepared.
Multiple mounting sleeves and multiple short drill strings are alternately arranged. Pressure and temperature sensors are installed on the mounting sleeves. Quick replacement and maintenance can be achieved by disassembling individual mounting sleeves. Sealing rings and protective components are installed between drill strings to extend service life.
It simplifies maintenance procedures, reduces backup costs, extends sensor lifespan, and improves detection accuracy and device stability.
Smart Images
Figure CN224161708U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of well leakage location technology, and in particular to a high-precision well leakage location device for drilling. Background Technology
[0002] In oil and gas drilling operations, well leakage is a common and serious problem that can lead to a large loss of drilling fluid, wellbore instability, or even a blowout.
[0003] A high-precision well leakage location device is a specialized equipment system used to accurately determine the location of well leakage during drilling. It typically consists of an array of multiple pressure or temperature sensors installed at specific intervals on the drill string or casing. The data collected by the sensors is analyzed using algorithms to determine the location of the well leakage.
[0004] However, if one of the pressure sensors or temperature sensors in the aforementioned high-precision well leakage positioning device is damaged, the entire device must be disassembled and replaced, which is a complicated process and makes replacement difficult. In addition, in order not to delay the construction progress, multiple positioning devices need to be prepared for replacement, which increases the cost. Utility Model Content
[0005] The technical problem to be solved by this utility model is: in order to solve the problem of difficult replacement and maintenance of existing high-precision well leakage positioning devices for drilling, this utility model provides a high-precision well leakage positioning device for drilling. The device is composed of multiple mounting cylinders and multiple short drill strings arranged alternately. Pressure sensors and temperature sensors are installed on the mounting cylinders. Quick replacement and maintenance can be achieved by replacing individual mounting cylinders, which simplifies the maintenance steps and reduces spare parts costs.
[0006] The technical solution adopted by this utility model to solve its technical problem is: a high-precision well leakage positioning device for drilling, including at least one mounting cylinder and at least two drill strings, wherein the mounting cylinder is detachably installed between the two drill strings; a placement cavity is provided inside the mounting cylinder, and a mounting hole is provided on the side of the mounting cylinder, the mounting hole penetrating the side of the mounting cylinder and communicating with the placement cavity; a detection component is installed in the placement cavity;
[0007] The detection component includes a pressure sensor and a temperature sensor, which are located on opposite sides of the placement cavity and are installed in the mounting hole with a clearance fit.
[0008] Therefore, this positioning device replaces the traditional whole drill string with multiple drill string segments, and an installation cylinder with detection components is provided between adjacent drill strings. When one set of detection components is damaged, the corresponding installation cylinder can be disassembled to achieve quick replacement and repair, simplifying the maintenance steps and reducing spare parts costs.
[0009] Furthermore, the detection assembly also includes a housing, which is fixedly installed inside the placement cavity. The pressure sensor and temperature sensor are detachably installed with respect to the housing. A control module is located inside the housing, and the control module is connected to the data processing system via a signal. The output of the control module is connected to the pressure sensor and temperature sensor via signals, respectively. A communication module is located at the top of the housing, and a positioning module is located at the bottom of the housing. The input of the communication module is connected to the temperature sensor and pressure sensor via signals, respectively. The output of the communication module is connected to the control module via a signal, and the input of the positioning module is connected to the control module via a signal.
[0010] Furthermore, a sealing ring is fitted on the outer side of the mounting part of the pressure sensor and the outer side of the temperature sensor; thereby, the sealing ring seals the pressure sensor, temperature sensor and mounting hole, preventing well fluid from entering the placement cavity and affecting the operation of the communication module and positioning module.
[0011] Furthermore, the sealing ring is made of perfluoroether rubber; thus, the sealing ring has strong corrosion resistance.
[0012] Furthermore, the detection assembly also includes a protective component located at the end of the pressure sensor and temperature sensor away from the housing. The protective component at the pressure sensor is slidably connected to the mounting hole, and the protective component at the temperature sensor is fixedly connected to the mounting hole. The side of the protective component near the placement cavity is in contact with the adjacent pressure sensor or temperature sensor. Thus, the protective component isolates and protects the pressure sensor and temperature sensor from the outside of the mounting cylinder, preventing the pressure sensor and temperature sensor from directly contacting the well fluid, thereby reducing the degree of damage to the pressure sensor and temperature sensor and extending the service life of the pressure sensor and temperature sensor.
[0013] Furthermore, the protective component is made of Hastelloy material; thus, in addition to being able to work for a long time under high temperature and certain stress, the protective component also has excellent thermal conductivity.
[0014] Furthermore, to prevent the well fluid from carrying fine sand and gravel into the connection between the mounting tube and the drill string, causing corrosion and rust at the connection, the end of the mounting tube is threaded to the drill string, and a sealing ring is installed between the mounting tube and the drill string. Thus, the sealing ring seals and protects the connection between the mounting tube and the drill string, extending the service life of both the mounting tube and the drill string.
[0015] Furthermore, to address the issue that traditional protruding sealing structures result in larger damaged areas and affect well fluid flow pressure, leading to increased errors in detection data, the end face diameter of the sealing ring is equal to the end face diameter of the mounting cylinder and the drill string. This reduces the damaged area of the sealing ring, resulting in a smooth and seamless appearance of the positioning device composed of the sealing ring, mounting cylinder, and drill string. It also reduces the impact of the sealing ring on well fluid flow pressure, indirectly ensuring the accuracy of the pressure sensor detection.
[0016] Furthermore, an annular groove is provided on the side of the mounting cylinder, and a limiting ring is installed in the annular groove with a clearance fit. A slot corresponding to the annular groove is provided on the inner side of the sealing ring. After the limiting ring expands due to heat, at least part of it enters the slot. Thus, as the internal temperature of the well rises, the limiting ring undergoes micro-expansion. After the limiting ring expands, it tightly engages with the annular groove and the slot, thereby improving the stability of the sealing ring and preventing the sealing ring from rotating or shaking due to pressure during movement, thus indirectly improving the sealing effect of the sealing ring.
[0017] Furthermore, the data processing system includes a temperature compensation module, a data acquisition module, a comparison module, and an alarm module. The output of the control module is signal-connected to the temperature compensation module. The temperature compensation module, data acquisition module, and alarm module are sequentially signal-connected. The output of the positioning module is signal-connected to the data acquisition module. Thus, the control module controls the temperature sensor, pressure sensor, and positioning module to activate. Subsequently, the data detected by the temperature sensor and pressure sensor are transmitted to the control module via the communication module. The control module transmits the data to the temperature compensation module for secondary processing and then sends it to the data acquisition module. The data acquisition module processes the data in conjunction with the data from the positioning module and then sends it to the comparison module. The comparison module processes multiple sets of data to infer the location of the well leakage and sends it to the alarm module for recording.
[0018] The beneficial effects of this utility model are that the high-precision well leakage positioning device of this utility model adopts a multi-section drill string and has an installation cylinder with detection components between adjacent drill strings. When one set of detection components is damaged, it can be quickly replaced and repaired simply by disassembling the corresponding installation cylinder, which simplifies the maintenance steps and reduces the spare parts cost.
[0019] The high-precision well leakage positioning device of this utility model is equipped with a protective component. The protective component isolates the pressure sensor and temperature sensor from the outside of the mounting cylinder, preventing the pressure sensor and temperature sensor from directly contacting the well fluid, thereby reducing the damage to the pressure sensor and temperature sensor and extending the service life of the pressure sensor and temperature sensor.
[0020] The high-precision well leakage positioning device of this utility model is equipped with a sealing ring. The sealing ring seals and protects the connection between the mounting cylinder and the drill string, preventing the well fluid from corroding and rusting the connection between the mounting cylinder and the drill string, and indirectly extending the service life of the mounting cylinder and the drill string. Attached Figure Description
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] Figure 1 This is a partial structural schematic diagram of the high-precision well leakage positioning device for drilling in this utility model.
[0023] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the mounting cylinder (axially cut open).
[0024] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the overall structure (axial sectioning of the mounting cylinder and drill string).
[0025] Figure 4 yes Figure 3 An enlarged schematic diagram of the structure at point A in the middle.
[0026] Figure 5 yes Figure 3 Enlarged schematic diagram of the structure at point B.
[0027] Figure 6 yes Figure 3 A schematic diagram of the state of the middle limiting ring after thermal expansion.
[0028] Figure 7 This is a schematic diagram of the detection process of the detection component.
[0029] In the diagram: 1. Mounting cylinder; 11. Placement cavity; 12. Mounting hole; 13. Annular groove; 2. Drill string; 3. Sealing ring; 31. Slot; 41. Housing; 42. Temperature sensor; 43. Pressure sensor; 44. Communication module; 45. Positioning module; 46. Protective component; 47. Control module; 51. Temperature compensation module; 52. Data acquisition module; 53. Comparison module; 54. Alarm module; 6. Limit ring. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0031] Example 1:
[0032] like Figures 1-4 and Figure 7As shown, a high-precision wellbore leakage positioning device includes n mounting cylinders 1 and n+2 drill strings 2, with a mounting cylinder 1 threaded between two adjacent drill strings 2 (see reference). Figure 1 The two adjacent installation cylinders are 15 meters apart;
[0033] Where: Reference Figure 2 , Figure 4 The mounting cylinder 1 has a placement cavity 11 inside, and a mounting hole 12 is opened on the side of the mounting cylinder 1. The mounting hole 12 penetrates the side of the mounting cylinder 1 and communicates with the placement cavity 11; a detection component is installed in the placement cavity 11.
[0034] The detection assembly includes a housing 41, a pressure sensor 43, and a temperature sensor 42. The housing 41 is fixedly installed in the placement cavity 11, and the pressure sensor 43 and the temperature sensor 42 are detachably installed in relation to the housing 41. The pressure sensor 43 and the temperature sensor 42 are located on opposite sides of the placement cavity 11 and are installed in the mounting holes 12 with clearance fit. The outer side of the mounting part of the pressure sensor 43 and the outer side of the temperature sensor 42 are fitted with sealing rings made of perfluoroether rubber.
[0035] Therefore, this positioning device replaces the traditional whole drill pipe with multiple drill string segments 2, and an installation cylinder 1 with detection components is provided between adjacent drill string segments 2. When one set of detection components is damaged, the corresponding installation cylinder 1 can be disassembled to achieve quick replacement and repair, simplifying the maintenance steps and reducing spare parts costs.
[0036] Where: Reference Figure 2 The housing 41 contains a control module 47, which is connected to the data processing system via a signal. The output of the control module 47 is connected to the pressure sensor 43 and the temperature sensor 42 via a signal. The top of the housing 41 contains a communication module 44, and the bottom of the housing 41 contains a positioning module 45. The input of the communication module 44 is connected to the temperature sensor 42 and the pressure sensor 43 via a signal. The output of the communication module 44 is connected to the control module 47 via a signal. The input of the positioning module 45 is connected to the control module 47 via a signal. The housing 41 also contains a power supply module that provides power to all electrical equipment.
[0037] Reference Figure 7The data processing system includes a temperature compensation module 51, a data acquisition module 52, a comparison module 53, and an alarm module 54. The output of the control module 47 is connected to the temperature compensation module 51 via a signal connection. The temperature compensation module 51, the data acquisition module 52, and the alarm module 54 are sequentially connected via signal connections. The output of the positioning module 45 is connected to the data acquisition module 52 via a signal connection. Thus, the control module 47 controls the temperature sensor 42, the pressure sensor 43, and the positioning module 45 to activate. Subsequently, the data detected by the temperature sensor 42 and the pressure sensor 43 are transmitted to the control module 47 via the communication module 44. The control module 47 transmits the data to the temperature compensation module 51 for secondary processing, and then sends it to the data acquisition module 52. The data acquisition module 52 then... The data, processed in conjunction with the positioning module 45 (which uses an inertial navigation positioning system (INS) to determine the location information), is then transmitted to the comparison module 53. The comparison module 53 compares the values detected by two adjacent installation cylinders 1. If the difference between the data detected by the two adjacent pressure sensors 43 is greater than a threshold, it indicates that there is an abnormality of well leakage in the area where the two installation cylinders 1 are located. The alarm module 54 will issue an alarm and record the location of the abnormal area, thereby achieving the effect of high-precision positioning of well leakage in drilling. If the difference between the data detected by the two adjacent pressure sensors 43 in the comparison module 53 is less than a threshold, there is no abnormality in the area. By comparing the data detected in the two adjacent installation cylinders 1 in real time, the well leakage in drilling can be detected.
[0038] Example 2: Refer to Figures 2-4 To extend the service life of pressure sensor 43 and temperature sensor 42, the following addition is made based on Embodiment 1:
[0039] The detection assembly also includes a protective element 46, which is located at the end of the pressure sensor 43 and temperature sensor 42 away from the housing 41. The protective element 46 located at the pressure sensor 43 is slidably connected to the mounting hole 12, and the protective element 46 located at the temperature sensor 42 is fixedly connected to the mounting hole 12. The side of the protective element 46 near the placement cavity 11 is in contact with the adjacent pressure sensor 43 or temperature sensor 42. Thus, the protective element 46 isolates and protects the pressure sensor 43 and temperature sensor 42 from the outside of the mounting cylinder 1, preventing the pressure sensor 43 and temperature sensor 42 from directly contacting the well fluid, thereby reducing the degree of damage to the pressure sensor 43 and temperature sensor 42 and extending the service life of the pressure sensor 43 and temperature sensor 42.
[0040] Among them, the protective component 46 is made of Hastelloy material; thus, in addition to being able to work for a long time under high temperature and certain stress, the protective component 46 also has excellent thermal conductivity.
[0041] Example 3: Refer to Figure 1 , Figure 3To prevent the well fluid from carrying fine sand and gravel into the connection between the mounting tube 1 and the drill string 2, causing corrosion and rust at the connection, the following addition is made based on Example 1:
[0042] Reference Figure 1 A sealing ring 3 is installed between the mounting cylinder 1 and the drill string 2; thus, the sealing ring 3 seals and protects the connection between the mounting cylinder 1 and the drill string 2, extending the service life of the mounting cylinder 1 and the drill string 2.
[0043] Where: Reference Figure 3 To address the issue that traditional protruding sealing structures result in larger damaged areas and affect well fluid flow pressure, leading to increased errors in detection data, the end face diameter of the sealing ring 3 is equal to the end face diameter of the mounting cylinder 1 and the end face diameter of the drill string 2. This reduces the damaged area of the sealing ring 3, resulting in a smooth and seamless appearance of the positioning device composed of the sealing ring 3, mounting cylinder 1, and drill string 2. This also reduces the impact of the sealing ring 3 on well fluid flow pressure, indirectly ensuring the accuracy of the pressure sensor 43.
[0044] Example 4: Refer to Figure 5 , Figure 6 To address the issue of the sealing ring rotating due to the pressure of well fluid flow, thus causing misalignment, the following addition is made to Example 3:
[0045] An annular groove 13 is provided on the side of the mounting cylinder 1. A limiting ring 6 is installed in the annular groove 13 with a clearance fit. A groove 31 corresponding to the annular groove 13 is provided on the inner side of the sealing ring 3. After the limiting ring 6 expands due to heat, at least part of it enters the groove 31. Thus, as the internal temperature of the well rises, the limiting ring 6 undergoes micro-expansion (refer to...). Figure 6 After the limiting ring 6 expands, it is tightly engaged with the ring groove 13 and the slot 31, thereby improving the stability of the sealing ring 3 and preventing the sealing ring 3 from rotating or shaking due to pressure during movement, thus indirectly improving the sealing effect of the sealing ring 3.
[0046] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A high-precision wellbore leakage positioning device, characterized in that: It includes at least one mounting cylinder (1) and at least two drill strings (2), wherein the mounting cylinder (1) is detachably mounted between the two drill strings (2); the mounting cylinder (1) has a placement cavity (11) inside, and a mounting hole (12) is opened on the side of the mounting cylinder (1), the mounting hole (12) penetrates the side of the mounting cylinder (1) and communicates with the placement cavity (11); a detection component is installed in the placement cavity (11); The detection component includes a pressure sensor (43) and a temperature sensor (42), which are located on both sides of the placement cavity (11) and are installed in the mounting hole (12) by clearance fit.
2. The high-precision wellbore leakage positioning device as described in claim 1, characterized in that: The detection assembly also includes a housing (41), which is fixedly installed in the placement cavity (11). The pressure sensor (43) and temperature sensor (42) are detachably installed in the housing (41). The housing (41) is equipped with a control module (47), which is connected to the data processing system via a signal. The output of the control module (47) is connected to the pressure sensor (43) and temperature sensor (42) via signals. The top of the housing (41) is provided with a communication module (44), and the bottom of the housing (41) is provided with a positioning module (45). The input end of the communication module (44) is connected to the temperature sensor (42) and the pressure sensor (43) respectively. The output end of the communication module (44) is connected to the control module (47) via a signal. The input end of the positioning module (45) is connected to the control module (47) via a signal.
3. The high-precision wellbore leakage positioning device as described in claim 1, characterized in that: A sealing ring is fitted on the outer side of the mounting part of the pressure sensor (43) and the outer side of the temperature sensor (42).
4. The high-precision wellbore leakage positioning device as described in claim 3, characterized in that: The detection assembly also includes a protective element (46), which is located at the end of the pressure sensor (43) and temperature sensor (42) away from the housing (41). The protective element (46) located at the pressure sensor (43) is slidably connected to the mounting hole (12), and the protective element (46) located at the temperature sensor (42) is fixedly connected to the mounting hole (12). The side of the protective element (46) near the placement cavity (11) is in contact with the adjacent pressure sensor (43) or temperature sensor (42).
5. The high-precision wellbore leakage positioning device as described in claim 4, characterized in that: The protective component (46) is made of Hastelloy alloy.
6. The high-precision wellbore leakage positioning device as described in claim 1, characterized in that: The end of the mounting cylinder (1) is connected to the drill string (2) by a thread, and a sealing ring (3) is installed between the mounting cylinder (1) and the drill string (2).
7. The high-precision wellbore leakage positioning device as described in claim 6, characterized in that: The end face diameter of the sealing ring (3) is equal to the end face diameter of the mounting cylinder (1) and the end face diameter of the drill string (2).
8. The high-precision wellbore leakage positioning device as described in claim 7, characterized in that: The mounting cylinder (1) has an annular groove (13) on its side. A limiting ring (6) is installed in the annular groove (13) with a clearance fit. The inner side of the sealing ring (3) has a slot (31) corresponding to the annular groove (13). After the limiting ring (6) is heated and expanded, at least part of it enters the slot (31).
9. The high-precision wellbore leakage positioning device as described in claim 2, characterized in that: The data processing system includes a temperature compensation module (51), a data acquisition module (52), a comparison module (53), and an alarm module (54); the output of the control module (47) is connected to the temperature compensation module (51) by a signal, the temperature compensation module (51), the data acquisition module (52), and the alarm module (54) are connected by a signal in sequence, and the output of the positioning module (45) is connected to the data acquisition module (52) by a signal.
10. The high-precision wellbore leakage positioning device as described in claim 3, characterized in that: The sealing ring is made of perfluoroether rubber.