Monitoring equipment and method for settling volume of wellhead device

Abstract

The invention relates to the field of oil and gas storage and transportation, and discloses equipment and a method for monitoring settlement of a wellhead device, a lifting assembly is additionally arranged on a level gauge body, lifting operation is performed through a control cabinet, and meanwhile, the control cabinet is used for checking data of a leveling bubble bottle so as to judge leveling of the equipment, so that manual leveling is avoided, and the working efficiency is improved. And meanwhile, the sight line of the camera is aligned to the midpoint of the invar steel coding ruler of the wellhead device, and the settlement amount of the gas storage wellhead device is monitored by combining the invar steel coding ruler with monitoring equipment, so that the monitoring efficiency of the settlement amount of the gas storage wellhead device is improved.

Description

Technical Field

[0001] This invention relates to the field of oil and gas storage and transportation, specifically to a monitoring device and method for wellhead device settlement. Background Technology

[0002] With the rapid development of underground gas storage and heavy oil steam injection operations, the safety of wellhead equipment has become increasingly prominent. Underground gas storage operations are characterized by intensive extraction and injection. Heavy oil steam injection involves very high steam temperatures, while extraction of heavy oil results in significant temperature drops. The temperature and pressure experienced by the wellbore undergo periodic changes, adversely affecting the internal stress field of the tubing string. Large stress field fluctuations can damage the hardened cement sheath in the wellbore, causing it to lose its displacement restraint. When the pressure or temperature within the tubing string increases, significant relative displacement occurs between the tubing string, casing string, and cement sheath, causing the wellhead equipment to rise. Repeated increases in temperature and pressure lead to an ever-rising wellhead equipment, eventually resulting in a redistribution of stress within the wellhead equipment, leading to leaks between the tubing hanger and the tubing or four-way connector. In more severe cases, large tensile stresses can develop within the casing string, ultimately causing fractures under the combined effects of corrosion and stress, resulting in severe blowouts and other catastrophic accidents, causing casualties, material losses, and severe social impact.

[0003] To understand the uplift of wellhead equipment, current methods include manual leveling, GPS, synthetic aperture radar (SAR, inSAR), or hydraulic hydrostatic levels. Manual leveling has low initial investment but low efficiency, requiring manual intervention each time and preventing online monitoring. GPS and SAR require data purchases, and online monitoring demands high equipment investment and advanced technical skills. Hydraulic hydrostatic levels allow for online monitoring, but the overall equipment investment is high. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the purpose of this invention is to provide a monitoring device and method for wellhead device settlement, so as to solve the technical problem of low efficiency of manual leveling measurement in the prior art.

[0005] This invention is achieved through the following technical solution:

[0006] In a first aspect, the present invention provides a monitoring device for the settlement of a wellhead device, comprising an automatically adjusting electronic level and a control cabinet; the wellhead device is equipped with an Invar steel coded ruler; the automatically adjusting electronic level includes a level body, a camera, several lifting components, and a leveling bubble bottle, the camera being mounted on the level body and its line of sight being aligned with the midpoint of the Invar steel coded ruler of the wellhead device; several lifting components are mounted at the bottom of the level body, and the leveling bubble bottle is mounted on the level body; the level body, the lifting components, and the leveling bubble bottle are electrically connected to the control cabinet.

[0007] Preferably, it also includes a support, and the level instrument body is placed on the support via several lifting components.

[0008] Furthermore, the lifting assembly includes a lifting rod and a lifting motor. The lifting motor is located on the top of the bracket, and a groove is provided on the top of the bracket corresponding to the position of the lifting rod. The lifting rod is inserted into the groove through the lifting motor, and the control end of the lifting motor is connected to the control cabinet.

[0009] Preferably, the leveling bubble bottle contains air bubbles, and a laser sensor is installed on the top of the leveling bubble bottle. The signal end of the laser sensor is connected to the control cabinet.

[0010] Preferably, a rotating disk is provided between the level instrument body and several lifting components, and the level instrument body rotates circumferentially through the rotating disk.

[0011] Furthermore, the level instrument body is equipped with an automatic rotation knob, which drives the level instrument body to rotate circumferentially on the rotating disk.

[0012] Preferably, the Invar steel coded ruler includes a ruler body with an Invar steel code on it, a fixed base at the top of the ruler body, and a suspended weight at the bottom of the ruler body. The ruler body is suspended from the wellhead device by the fixed base.

[0013] Preferably, the control cabinet is equipped with a controller, the input end of which is connected to a signal receiving module, the input end of which is connected to the signal output end of the leveling instrument body and the leveling bubble bottle, the output end of the controller is connected to a signal output module, the output end of which is connected to a drive module, and the drive module is connected to several lifting components.

[0014] Furthermore, the controller also includes a human-machine interaction module, which is connected to the output of the controller and is used to display the data monitored by the leveling instrument body and the leveling bubble bottle.

[0015] Secondly, the present invention provides a method for monitoring the settlement of a wellhead device, based on the aforementioned monitoring equipment for the settlement of a wellhead device, comprising the following processes:

[0016] The controller controls the lifting assembly to adjust the level instrument body horizontally, controls the automatic rotary knob to adjust the alignment with the wellhead device, and stops the adjustment when the camera's line of sight is aligned with the Invar steel coded ruler of the wellhead device. The controller then controls the lifting assembly to level the level instrument body and confirms the leveling by using the data fed back from the leveling bubble bottle. After the camera's line of sight is aligned with the midpoint of the Invar steel coded ruler of the wellhead device, the settlement of the gas storage wellhead device is monitored.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] This invention provides a monitoring device for the settlement of a wellhead device. By adding a lifting component to the level instrument body and controlling the lifting operation through a control cabinet, the device's leveling is determined by checking the data from the leveling bubble bottle through the control cabinet, thus avoiding manual leveling. Furthermore, by aligning the camera's line of sight with the midpoint of the Invar steel coded ruler of the wellhead device, the settlement of the gas storage wellhead device is monitored using the Invar steel coded ruler in conjunction with the monitoring device, thereby improving the monitoring efficiency of the gas storage wellhead device's settlement.

[0019] Furthermore, the level instrument body is placed on a support via several lifting components. The support can raise the level instrument body to a certain height, and then the lifting components can be used for small-range lifting and lowering, which improves the monitoring efficiency of the settlement of the gas storage wellhead device.

[0020] Furthermore, the lifting motor is located at the top of the bracket, and a groove is provided at the top of the bracket corresponding to the position of the lifting rod. The lifting rod is inserted into the groove through the lifting motor. The control end of the lifting motor is connected to the control cabinet. By controlling the control cabinet, the lifting motor is driven, which in turn drives the lifting rod to move up and down. No manual lifting is required, saving manpower. The lifting action can be completed simply by controlling the control cabinet.

[0021] Furthermore, the leveling bubble bottle contains air bubbles, and a laser sensor is installed on the top of the leveling bubble bottle. The signal end of the laser sensor is connected to the control cabinet. The laser sensor monitors the air bubble condition inside the leveling bubble bottle to determine whether leveling is required. When the air bubble is in the center, it indicates that the equipment is in a balanced state; otherwise, leveling is required.

[0022] Furthermore, a rotating disk is provided between the level instrument body and several lifting components. The level instrument body rotates circumferentially through the rotating disk. The level instrument body is equipped with an automatic rotation knob, which drives the level instrument body to rotate circumferentially on the rotating disk, demonstrating the overall flexibility of the level instrument body.

[0023] Furthermore, the Invar steel coding ruler includes a ruler body with an Invar steel coding on it. A fixed base is provided at the top of the ruler body, and the ruler body is suspended on the wellhead device through the fixed base. A suspended weight is provided at the bottom of the ruler body to ensure that the Invar steel coding is always in a vertical position, which is convenient for camera monitoring and improves the monitoring efficiency of the settlement of the gas storage wellhead device.

[0024] Furthermore, the control cabinet is equipped with a controller. The input terminal of the controller is connected to a signal receiving module. The input terminal of the signal receiving module is connected to the signal output terminals of the leveling instrument body and the leveling bubble bottle. The output terminal of the controller is connected to a signal output module. The output terminal of the signal output module is connected to a drive module. The drive module is connected to several lifting components. The control is achieved through the control cabinet, saving manpower and improving monitoring efficiency.

[0025] This invention also provides a method for monitoring the settlement of a wellhead device. The method involves a controller in the monitoring equipment that controls a lifting assembly to adjust the horizontal and circumferential position of the leveling instrument. The lifting stops when the camera's line of sight is aligned with the Invar steel coded ruler of the wellhead device. The lifting assembly is then controlled to level the leveling instrument, and the leveling is confirmed by data from the leveling bubble bottle. This ensures the camera's line of sight is aligned with the midpoint of the Invar steel coded ruler of the wellhead device, allowing for real-time online monitoring of the gas storage wellhead device's settlement. This method can automatically monitor the elevation changes of each well in real-time based on environmental conditions, either as needed or daily. It achieves online monitoring of wellhead rise at a relatively low total cost, saving significant manpower and financial investment, with an accuracy of ±0.5mm. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the monitoring device for monitoring the wellhead of the gas storage facility in this invention;

[0027] Figure 2 This is a rear view of the monitoring device in this invention;

[0028] Figure 3 This is a schematic diagram of the lifting component structure in this invention;

[0029] Figure 4 This is a schematic diagram of the leveling bubble bottle in this invention;

[0030] Figure 5 This is a schematic diagram of the Invar steel coding ruler in this invention;

[0031] Figure 6 This is a distribution diagram of the wellhead equipment at a gas storage well site in Embodiment 3 of the present invention;

[0032] In the diagram: 1-Automatic leveling electronic instrument; 2-Wellhead device; 3-Invar steel coded ruler; 4-Control cabinet; 5-Bracket; 11-Leveling instrument body; 12-Camera; 13-Automatic rotary knob; 14-Lifting assembly; 15-Leveling bubble bottle; 16-Rotating disc; 141-Lifting rod; 142-Lifting motor; 151-Laser sensor; 152-Bubble; 31-Ruler body; 32-Invar steel coded ruler; 33-Fixed base; 34-Suspended weight. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings:

[0036] The purpose of this invention is to provide a monitoring device and method for wellhead device settlement, so as to solve the technical problem of low efficiency of manual leveling measurement in the prior art.

[0037] This invention's monitoring equipment is suitable for monitoring elevation changes at relatively dispersed, fixed locations, such as wellheads for gas injection and production in gas storage facilities, and wellheads for heavy oil steam injection development. Manual elevation measurement is inefficient, and using other high-tech monitoring equipment is too costly. It is not suitable for monitoring elevation changes over large areas, such as changes in surface elevation after natural gas injection into underground reservoirs or after large-scale natural gas extraction.

[0038] Example 1

[0039] See Figure 1 In one embodiment of the present invention, a monitoring device for the settlement of a wellhead device is provided, including an automatically adjusting electronic level 1 and a control cabinet 4; the wellhead device 2 is equipped with an Invar steel coded ruler 3; the automatically adjusting electronic level 1 includes a level body 11, a camera 12, several lifting components 14, and a leveling bubble bottle 15, as shown below. Figure 2As shown, the camera 12 is mounted on the level instrument body 1, and the line of sight of the camera 12 is aligned with the midpoint of the Invar steel encoder 3 of the wellhead device 2; several lifting components 14 are mounted on the bottom of the level instrument body 11, and the leveling bubble bottle 15 is mounted on the level instrument body 11. The level instrument body 11, the lifting components 14 and the leveling bubble bottle 15 are electrically connected to the control cabinet 4 respectively.

[0040] Specifically, the monitoring equipment also includes a support 5, on which the level instrument body 11 is placed via several lifting components 14. Figure 3 As shown, the lifting assembly 14 includes a lifting rod 141 and a lifting motor 142. The lifting motor 142 is located on the top of the bracket 5. The top of the bracket has a groove corresponding to the position of the lifting rod 141. The lifting rod 141 is inserted into the groove through the lifting motor 142. The control end of the lifting motor 142 is connected to the control cabinet 4.

[0041] Specifically, according to Figure 4 As shown, the leveling bubble bottle 15 contains a bubble 152, and a laser sensor 151 is located on the top of the leveling bubble bottle 15. The signal terminal of the laser sensor 151 is connected to the control cabinet 4. During the monitoring process, if the bubble 152 in the leveling bubble bottle 15 is not centered (centered indicates that the automatic adjusting electronic level 1 is in a horizontal state), the laser sensor 151 sends a signal to the control cabinet 4 through the signal line. The control cabinet 4 then sends an adjustment command to the lifting assembly 14 according to the direction and degree of deviation, causing the automatic adjusting electronic level 1 to adjust until the bubble 152 in the leveling bubble bottle 15 is centered.

[0042] Specifically, a rotating disk 16 is provided between the level instrument body 11 and several lifting components 14, and the level instrument body 11 rotates circumferentially through the rotating disk 16. The level instrument body 11 is provided with an automatic rotation knob 13, which drives the level instrument body 11 to rotate circumferentially on the rotating disk 16.

[0043] Specifically, according to Figure 5 As shown, the Invar steel coding ruler 3 includes a ruler body 31, on which an Invar steel coding 32 is provided. A fixed base 33 is provided at the top of the ruler body 31, and a suspended weight 34 is provided at the bottom of the ruler body 31. The ruler body 31 is suspended on the wellhead device 2 through the fixed base 33.

[0044] Specifically, the control cabinet 4 is equipped with a controller. The input end of the controller is connected to a signal receiving module. The input end of the signal receiving module is connected to the signal output end of the level instrument body 11 and the leveling bubble bottle 15. The output end of the controller is connected to a signal output module. The output end of the signal output module is connected to a drive module. The drive module is connected to several lifting components 14.

[0045] The controller also includes a human-computer interaction module, which is connected to the output of the controller and is used to display the data monitored by the level instrument body 11 and the leveling bubble bottle 15.

[0046] In this invention, the distance between the wellhead device 2 and the automatic adjusting electronic level 1 is less than 50 meters, but should be as large as possible. The installation point should be positioned to minimize external influences, be securely installed, and its height should ensure that the line of sight of the automatic adjusting electronic level 1 is basically aligned with the midpoint of the Invar steel encoder 3 at each wellhead. The Invar steel encoder 3 is fixed to the wellhead device 2 using resin adhesive, screws, or binding. Its installation position should not obstruct the line of sight from the monitoring point to the encoder, should not interfere with valve operation, should not be easily touched, and should prevent the entire Invar steel encoder from shaking in windy conditions, which would affect detection accuracy.

[0047] Example 2

[0048] The present invention also provides a method for monitoring the settlement of a wellhead device, based on the aforementioned monitoring equipment for the settlement of a wellhead device, comprising the following processes:

[0049] The controller 4 controls the lifting assembly 14 to adjust the height of the level instrument body 11, and controls the automatic rotary knob 13 to adjust the alignment with the wellhead device. When the camera 12's line of sight is aligned with the Invar steel encoder 3 of the wellhead device 2, the lifting and lowering stops, and the lifting assembly 14 is controlled to level the level instrument body 11. The leveling is confirmed by the data fed back by the leveling bubble bottle 15, so that the camera 12's line of sight is aligned with the midpoint of the Invar steel encoder 3 of the wellhead device 2, and the settlement of the gas storage wellhead device is monitored.

[0050] Example 3

[0051] Based on the wellhead settlement monitoring equipment described in this application, the wellhead equipment of a gas storage well site was monitored. The gas storage well site measures 50m × 100m and contains 5 wells. Figure 6As shown. The gray dots indicate the relative wellhead plane position of the Invar steel coded ruler installation, ensuring a good line of sight between the Invar steel coded ruler and the monitoring point. The monitoring point is located approximately in the middle of the well site length, about 2 meters from the side of the perimeter wall. First, install the automatic adjustment electronic level 1 at the monitoring point, level it, and align it with the wellhead to be installed. For this well site, first align it with wellhead #4, installing an Invar steel coded ruler approximately 100mm long. Align the level's viewpoint with approximately the middle position of the Invar steel coded ruler and record the plane angle of the level at this point. Then, rotate the automatic adjustment electronic level to align with wellhead #5, similarly installing the Invar steel coded ruler and aligning the level's viewpoint with approximately the middle position of the Invar steel coded ruler, recording the plane angle of the level at this point. Using the same method, install the Invar steel coded ruler sequentially at wellheads #1, #2, and #3, and record the corresponding plane angles of the level. The corresponding leveling instrument plane angles of the five wellhead devices are input as control parameters into the automatic control module as command parameters for automatically locating the wellheads. The leveling instrument is set to automatic mode and an elevation check is performed, serving as the benchmark for subsequent wellhead device lifting calculations. After the leveling instrument starts, it first performs automatic leveling to ensure the leveling bubble is centered. Then, according to the input leveling instrument plane angles, elevation checks are performed starting with wellhead device #4, followed by wellhead devices #5, #1, #2, and #3. Finally, the leveling instrument is rotated in the same direction again to check the elevation of wellhead device #4. The elevations of wellhead #4 measured in the two tests are compared. If the difference exceeds 1.2 mm, the test should be repeated. During the testing process, the leveling bubble must be kept centered at all times. If the bubble is sometimes centered but unstable, it is determined that the wind speed is too high, and the test should be repeated after 30 minutes.

[0052] In summary, this invention, based on electronic leveling technology, involves installing one unit at each well site and a height gauge on each wellhead device. It allows for real-time online monitoring of wellhead uplift based on environmental conditions, either as needed or automatically and daily. This achieves online monitoring of wellhead uplift at a relatively low total cost, saving significant manpower and financial investment, with an accuracy of ±0.5mm. This invention uses video monitoring of benchmark and monitoring points, then integrates elevation detection and calculation methods with image processing to analyze and calculate the settlement of the gas storage wellhead device.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A monitoring device for wellhead settlement, characterized in that, The system includes an automatic leveling electronic instrument (1) and a control cabinet (4); the wellhead device (2) is equipped with an Invar steel coded ruler (3); the automatic leveling electronic instrument (1) includes a leveling instrument body (11), a camera (12), several lifting components (14) and a leveling bubble bottle (15), the camera (12) is set on the leveling instrument body (1), and the line of sight of the camera (12) is aligned with the midpoint of the Invar steel coded ruler (3) of the wellhead device (2); several lifting components (14) are set at the bottom of the leveling instrument body (11), the leveling bubble bottle (15) is set on the leveling instrument body (11), and the leveling instrument body (11), the lifting components (14) and the leveling bubble bottle (15) are electrically connected to the control cabinet (4).

2. The wellhead device settlement monitoring equipment according to claim 1, characterized in that, It also includes a support (5), on which the level instrument body (11) is placed via several lifting components (14).

3. The wellhead device settlement monitoring equipment according to claim 2, characterized in that, The lifting assembly (14) includes a lifting rod (141) and a lifting motor (142). The lifting motor (142) is located on the top of the bracket (5). The top of the bracket has a groove corresponding to the position of the lifting rod (141). The lifting rod (141) is inserted into the groove through the lifting motor (142). The control end of the lifting motor (142) is connected to the control cabinet (4).

4. The wellhead device settlement monitoring equipment according to claim 1, characterized in that, The leveling bubble bottle (15) contains a bubble (152), and a laser sensor (151) is provided on the top of the leveling bubble bottle (15). The signal end of the laser sensor (151) is connected to the control cabinet (4).

5. The wellhead device settlement monitoring equipment according to claim 1, characterized in that, A rotating disk (16) is provided between the level instrument body (11) and several lifting components (14), and the level instrument body (11) rotates circumferentially through the rotating disk (16).

6. The wellhead device settlement monitoring equipment according to claim 5, characterized in that, The level instrument body (11) is equipped with an automatic rotation knob (13), which drives the level instrument body (11) to rotate circumferentially on the rotating disk (16).

7. The wellhead device settlement monitoring equipment according to claim 1, characterized in that, The Invar steel coding ruler (3) includes a ruler body (31), an Invar steel coding (32) is provided on the ruler body (31), a fixed base (33) is provided at the top of the ruler body (31), and a suspended weight (34) is provided at the bottom of the ruler body (31). The ruler body (31) is suspended on the wellhead device (2) through the fixed base (33).

8. The wellhead device settlement monitoring equipment according to claim 1, characterized in that, The control cabinet (4) is equipped with a controller. The input end of the controller is connected to a signal receiving module. The input end of the signal receiving module is connected to the signal output end of the level instrument body (11) and the leveling bubble bottle (15). The output end of the controller is connected to a signal output module. The output end of the signal output module is connected to a drive module. The drive module is connected to several lifting components (14).

9. The wellhead device settlement monitoring equipment according to claim 8, characterized in that, The controller also includes a human-machine interaction module, which is connected to the output of the controller and is used to display the data monitored by the level instrument body (11) and the leveling bubble bottle (15).

10. A method for monitoring the settlement of a wellhead device, based on the wellhead device settlement monitoring equipment according to any one of claims 1-9, characterized in that, The process includes the following: The controller (4) controls the lifting assembly (14) to adjust the level body (11) horizontally, controls the automatic rotary knob (13) to adjust the alignment with the wellhead device, stops the adjustment when the camera (12)’s line of sight is aligned with the Invar steel coding ruler (3) of the wellhead device (2), and controls the lifting assembly (14) to level the level body (11), and determines the leveling by the data fed back by the leveling bubble bottle (15), so that the camera (12)’s line of sight is aligned with the midpoint of the Invar steel coding ruler (3) of the wellhead device (2) and then monitors the settlement of the gas storage wellhead device.

Images