Wellhead electric timing deflation valve of heavy oil well
By designing an electric timing bleed valve at the wellhead of the heavy oil well, and using a servo motor and threaded rod system, the timing bleed and pressure control of the wellhead of the heavy oil well is achieved, which solves the problem that the fixed pressure bleed valve in the existing technology cannot achieve timing bleed and The cumbersome operation issues improve control accuracy and operation convenience.
Patent Information
- Application Number
- CN202422837951.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The fixed pressure bleed valve at the wellhead of the existing heavy oil well cannot achieve regular air bleeding, resulting in gases that do not reach the emission volume in the oil pipe, and the operation is complicated, making it easy to cause inaccurate pressure setting values.
A heavy oil wellhead electric timing vent valve is designed, and a servo motor is used to drive the threaded rod to rotate. Through limit limit, the position of the hollow plunger is adjusted to realize the timing pressure relief and pressure control of the gas, which simplifies operation and improves the Accuracy.
It realizes timely deflation without manual operation, improves the control accuracy of gas emission pressure, simplifies the operation process, and can quickly unload pressure in emergencies.
Smart Images
Figure CN222207863U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of petroleum development, in particular to an electric timing air release valve at the wellhead of a heavy oil well. Background Art
[0002] During the development of oil fields, as oil and gas are produced, a large amount of casing gas will be generated in the casing of the pumping well. If the gas is not discharged in time, it will affect the normal operation of the deep well pump downhole. Oil workers often have to release the casing gas associated with the pumping well. The working principle of the downhole bleed valve of the heavy oil well is mainly to use the balance between the elastic force of the spring and the compression force of the gas to achieve constant pressure discharge of the gas. The gas discharge pressure value is determined by the pre-compression value of the spring, and different gas discharge pressure values can be obtained by adjusting the different compression amounts of the spring. When the gas accumulation reaches the set pressure, the air pressure pushes the valve stem open, the casing gas begins to be discharged, and the pressure drops; when the pressure drops to the set value, the valve stem is pressed down by the spring force, the valve stem and the valve seat are re-sealed, and the gas is no longer discharged. When the gas gathers again and the pressure rises again, the above process is repeated to release gas in this cycle. At present, the heavy oil well bleed valves are all fixed-pressure bleed valves, which cannot achieve timed bleed, making it easy for gas that does not reach the discharge amount to accumulate in the oil pipe. At the same time, the current fixed-pressure bleed valve requires staff to manually rotate the screw to make the valve stem press the spring, thereby completing the pressure setting of the spring. The operation is cumbersome and prone to deviations, resulting in inaccurate pressure setting values.
[0003] Therefore, it is necessary to provide a new electric timing air release valve for a heavy oil wellhead to solve the above technical problems. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides an electric timing air release valve for a heavy oil well head.
[0005] The utility model provides an electric timed air release valve for a heavy oil well head, comprising a valve body, wherein a horizontal push chamber and a pressure relief chamber are provided in the valve body, and an air inlet pipe connected to the push chamber is fixedly installed in the middle of the lower surface of the valve body, and an exhaust pipe connected to the pressure relief chamber is fixedly installed on one side end surface of the valve body;
[0006] A push tube with a sliding connection is inserted into the push cavity, the end of the push tube extends into the pressure relief cavity and is fixedly installed with a hollow plunger, and a sealing ball core for sealing the hollow plunger is installed in the hollow plunger, a spring is fixedly installed on the sealing ball core, and the other end of the spring is fixedly installed on the side wall of the valve body;
[0007] An adjusting assembly for pushing the hollow plunger to press the spring is installed in the pushing cavity;
[0008] The valve body is provided with a plurality of annularly distributed U-shaped flow channels, and both openings of the U-shaped flow channels are communicated with the pressure relief chamber.
[0009] Preferably, the adjusting assembly includes a servo motor, which is fixedly mounted on an end of the valve body away from the exhaust pipe through a frame, and a threaded rod is fixedly mounted on the output end of the servo motor, the threaded rod is inserted into the push cavity, and a threaded sleeve is threadedly mounted on the threaded rod, and the threaded sleeve is fixedly connected to the connecting end of the push tube.
[0010] Preferably, a plurality of limiting ribs which are distributed in an annular manner and arranged along the axial direction of the threaded sleeve are fixedly mounted on the outer cylinder wall of the threaded sleeve, and the limiting ribs are respectively inserted into the limiting grooves provided in the valve body and are slidably connected to the limiting grooves.
[0011] Preferably, a spherical groove and an outer expansion cavity connected to the spherical groove are provided in the hollow plunger, and the inner diameter of the outer expansion cavity increases gradually from the spherical groove toward the exhaust pipe.
[0012] Preferably, the push tube is provided with a plurality of annularly distributed ventilation cavities, and the push tube is communicated with the spherical groove provided in the hollow plunger.
[0013] Preferably, the inner diameter of the pushing cavity is smaller than that of the pressure relief cavity, and a plurality of sealing rings are provided on the fixed sleeve of the hollow plunger.
[0014] Compared with the related art, the electric timing air release valve for heavy oil wells provided by the utility model has the following beneficial effects:
[0015] 1. The utility model sets the opening and closing time of the servo motor according to the time when the pressure needs to be discharged. The servo motor is turned on to drive the threaded rod to rotate. Since the threaded sleeve on the threaded rod is limited by the limit ridge, the threaded sleeve slides along the threaded rod toward the servo motor, so that the threaded sleeve pulls back the hollow plunger through the push tube, so that the sealing ball core slips off the hollow plunger, so that the sealing ball core no longer blocks the hollow plunger, so the valve body is depressurized. After the end, the servo motor is turned on to drive the threaded rod to reverse, and the hollow plunger slides toward the exhaust pipe, so that the sealing ball core blocks the hollow plunger, so that the entire valve body can be depressurized and deflated at a fixed time, without the need for staff to operate, which is simple and convenient;
[0016] 2. The utility model drives the threaded rod to rotate by turning on the servo motor. Since the threaded sleeve on the threaded rod is limited by the limit ridge, the threaded sleeve can slide inward or outward along the threaded rod, so that the threaded sleeve can push the hollow plunger through the push tube to complete the adjustment of the spring compression amount. Therefore, the valve body can flexibly control the opening pressure of the sealing ball core through the compression spring, which is convenient for the staff to adjust the pressure value of the gas discharged according to the pipeline. Since the servo motor is used for electric control, the control accuracy is greatly improved, the operation is simple, and it saves time and effort;
[0017] 3. If an emergency situation occurs and the heavy oil well needs to be quickly depressurized, the servo motor is turned on to drive the hollow plunger to slide between the two orifices of the U-shaped flow channel. At this time, the two orifices of the U-shaped flow channel connect the pressure relief chambers on both sides of the hollow plunger, so that exhaust can be carried out directly. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A structural schematic diagram of a preferred embodiment of the electric timing air release valve at the wellhead of a heavy oil well provided by the utility model;
[0019] Figure 2 for Figure 1 The cross-sectional structural diagram shown;
[0020] Figure 3 for Figure 2 The structural schematic diagram of the valve body shown;
[0021] Figure 4 for Figure 2 Schematic diagram of the structure of the hollow plunger and the sealing ball core shown.
[0022] Numbers in the figure: 1, valve body; 1a, push chamber; 1b, pressure relief chamber; 1c, limit groove; 1d, U-shaped flow channel; 2, air inlet pipe; 3, exhaust pipe; 4, push pipe; 4a, ventilation chamber; 5, hollow plunger; 5a, spherical groove; 5b, external expansion chamber; 51, sealing ring; 6, sealing ball core; 7, spring; 8, adjustment assembly; 81, servo motor; 82, threaded rod; 83, threaded sleeve; 831, limit rib. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0024] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.
[0025] See also Figures 1 to 4The utility model provides an electric timed air bleed valve for a heavy oil wellhead, which comprises a valve body 1, a hollow plunger 5, a sealing ball core 6, a spring 7 and an adjusting assembly 8. A horizontal push chamber 1a and a pressure relief chamber 1b which are interconnected are provided in the valve body 1, and the inner diameter of the push chamber 1a is smaller than that of the pressure relief chamber 1b. An air inlet pipe 2 which is connected to the push chamber 1a is fixedly installed in the middle of the lower surface of the valve body 1, and an exhaust pipe 3 which is connected to the pressure relief chamber 1b is fixedly installed on one side end surface of the valve body 1. Fixed flanges are installed on the air inlet pipe 2 and the exhaust pipe 3, so as to facilitate the connection between the valve body 1 and the pipeline and the exhaust pipe on the heavy oil wellhead.
[0026] In the embodiments of the present invention, please refer to Figures 1 to 4 A push tube 4 with a sliding connection is inserted into the push chamber 1a, the end of the push tube 4 extends into the pressure relief chamber 1b and is fixedly installed with a hollow plunger 5, and a sealing ball core 6 for sealing the hollow plunger 5 is installed in the hollow plunger 5, a spring 7 is fixedly installed on the sealing ball core 6, and the other end of the spring 7 is fixedly installed on the side wall of the valve body 1;
[0027] An adjusting assembly 8 for pushing the hollow plunger 5 to compress the spring 7 is installed in the pushing chamber 1a, and the adjusting assembly 8 includes a servo motor 81, which is fixedly installed at the end of the valve body 1 away from the exhaust pipe 3 through a frame, and a threaded rod 82 is fixedly installed at the output end of the servo motor 81, the threaded rod 82 is inserted into the pushing chamber 1a, and a threaded sleeve 83 with a threaded connection is sleeved on the threaded rod 82, and the threaded sleeve 83 is fixedly connected to the connecting end of the pushing tube 4.
[0028] It should be noted that: in the initial state, the sealing ball core 6 is driven by the elastic force of the spring 7 to slide into the spherical groove 5a in the hollow plunger 5, thereby sealing the hollow plunger 5. At the same time, the two openings of the U-shaped flow channel 1d are located between the hollow plunger 5 and the exhaust pipe 3, so the hollow plunger 5 also seals the pressure relief chamber 1b (see Appendix). Figure 2 shown);
[0029] The staff sets the opening and closing time for the servo motor 81 according to the time when the pressure needs to be discharged, and turns on the servo motor 81 to drive the threaded rod 82 to rotate. Since the threaded sleeve 83 on the threaded rod 82 is limited by the limit ridge 831, the threaded sleeve 83 slides along the threaded rod 82 toward the servo motor 81, so that the threaded sleeve 83 pulls back the hollow plunger 5 through the push tube 4, so that the sealing ball core 6 slips off the hollow plunger 5, so that the sealing ball core 6 no longer blocks the hollow plunger 5, so the valve body 1 is depressurized. After the end, the servo motor 81 is turned on to drive the threaded rod 82 to reverse, slide the hollow plunger 5 toward the exhaust pipe 3, so that the sealing ball core 6 blocks the hollow plunger 5, so that the entire valve body 1 can be depressurized and deflated at a fixed time, without the need for staff to operate, which is simple and convenient;
[0030] Furthermore, when the air pressure is greater than the set pressure value of the spring 7, the gas enters the push chamber 1a through the intake pipe 2, flows from the ventilation chamber 4a to the push pipe 4, and then enters the hollow plunger 5 through the push pipe 4. At this time, the sealing ball core 6 slides toward the exhaust pipe 3 and compresses the spring 7 after being subjected to the air pressure, so that the gas passes through the hollow plunger 5 and is discharged from the exhaust pipe 3 to relieve the pressure, so that when the oil pipe has not reached the pressure relief and venting time and the pressure in the oil pipe is greater than the set pressure value of the spring 7, the pressure can be automatically relieved;
[0031] It is worth noting that the threaded rod 82 can be driven to reverse by turning on the servo motor 81. Since the threaded sleeve 83 on the threaded rod 82 is restricted by the limit rib 831, the threaded sleeve 83 can slide inward or outward along the threaded rod 82, so that the threaded sleeve 83 can push the hollow plunger 5 through the push tube 4 to complete the adjustment of the compression amount of the spring 7. Therefore, the valve body 1 can flexibly control the opening pressure of the sealing ball core 6 by compressing the spring 7, which is convenient for the staff to adjust the pressure value of the oil pipe to automatically discharge the gas according to the needs of the pipeline. Since the servo motor 81 is used for electric control, the control accuracy is greatly improved, the operation is simple, and it saves time and effort.
[0032] In the present embodiment, a spherical groove 5a and an outer expansion cavity 5b connected to the spherical groove 5a are provided in the hollow plunger 5, and the inner diameter of the outer expansion cavity 5b increases gradually from the spherical groove 5a toward the exhaust pipe 3, so that the sealing ball core 6 in the hollow plunger 5 slides toward the outer expansion cavity 5b after being subjected to air pressure. Since the inner diameter of the outer expansion cavity 5b increases gradually from the spherical groove 5a toward the exhaust pipe 3, it is convenient for the sealing ball core 6 to slide out of the spherical groove 5a for deflation.
[0033] A plurality of sealing rings 51 are fixedly sleeved on the hollow plunger 5 , so that the hollow plunger 5 can seal the pressure relief chamber 1 b .
[0034] In addition, a plurality of annularly distributed ventilation cavities 4a are provided on the push tube 4, and the push tube 4 is interconnected with the spherical groove 5a provided in the hollow plunger 5, thereby facilitating the gas to enter the push tube 4 from the ventilation cavity 4a, and enter the hollow plunger 5 from the push tube 4 to abut against the sealing ball core 6 located in the hollow plunger 5.
[0035] Furthermore, a plurality of limiting ribs 831 are fixedly installed on the outer tube wall of the threaded sleeve 83, which are distributed in an annular manner and arranged along the axial direction of the threaded sleeve 83, and the limiting ribs 831 are respectively inserted into the limiting grooves 1c opened in the valve body 1 and are slidably connected with the limiting grooves 1c. Since the threaded sleeve 83 is restricted by the limiting ribs 831, when the threaded rod 82 rotates, the threaded sleeve 83 can push the push tube 4 outward or pull the push tube 4 inward along the threaded rod 82.
[0036] In the embodiments of the present invention, please refer to Figures 1 to 4The valve body 1 is provided with a plurality of annularly distributed U-shaped flow channels 1d, and both openings of the U-shaped flow channels 1d are connected to the pressure relief chamber 1b.
[0037] It should be noted that: if an emergency occurs and the heavy oil well needs to be quickly depressurized, the servo motor 81 is turned on to drive the hollow plunger 5 to slide between the two orifices of the U-shaped flow channel 1d. At this time, the two orifices of the U-shaped flow channel 1d connect the pressure relief chambers 1b on both sides of the hollow plunger 5, so that exhaust can be carried out directly.
[0038] The working principle of the electric timing air release valve at the wellhead of the heavy oil well provided by the utility model is as follows:
[0039] In the initial state, the sealing ball core 6 is driven by the elastic force of the spring 7 to slide into the spherical groove 5a in the hollow plunger 5, thereby sealing the hollow plunger 5. At the same time, the two openings of the U-shaped flow channel 1d are located between the hollow plunger 5 and the exhaust pipe 3, so the hollow plunger 5 also seals the pressure relief chamber 1b (see Figure 2). Figure 2 shown);
[0040] The staff sets the opening and closing time of the servo motor 81 according to the time when the pressure needs to be discharged, and turns on the servo motor 81 to drive the threaded rod 82 to rotate. Since the threaded sleeve 83 on the threaded rod 82 is restricted by the limit ridge 831, the threaded sleeve 83 slides along the threaded rod 82 toward the servo motor 81, so that the threaded sleeve 83 pulls back the hollow plunger 5 through the push tube 4. Therefore, the sealing ball core 6 slips off the hollow plunger 5, so that the sealing ball core 6 no longer blocks the hollow plunger 5, so the valve body 1 is depressurized. After the end, the servo motor 81 is turned on to drive the threaded rod 82 to reverse, and the hollow plunger 5 slides toward the exhaust pipe 3. , so that the sealing ball core 6 blocks the hollow plunger 5, so that the entire valve body 1 can be depressurized and deflated at a fixed time, without the need for staff to operate, which is simple and convenient; when the air pressure is greater than the set pressure value of the spring 7, the gas enters the push chamber 1a through the intake pipe 2 and then flows from the ventilation chamber 4a to the push tube 4, and then enters the hollow plunger 5 through the push tube 4. At this time, the sealing ball core 6 slides toward the exhaust pipe 3 under the air pressure and compresses the spring 7, so that the gas passes through the hollow plunger 5 and is discharged from the exhaust pipe 3 to relieve the pressure, so that when the oil pipe has not reached the depressurization and deflation time and the pressure in the oil pipe is greater than the set pressure value of the spring 7, the pressure can be automatically relieved;
[0041] By turning on the servo motor 81, the threaded rod 82 is driven to reverse. Since the threaded sleeve 83 on the threaded rod 82 is restricted by the limit ridge 831, the threaded sleeve 83 can slide inward or outward along the threaded rod 82, so that the threaded sleeve 83 can push the hollow plunger 5 through the push tube 4 to complete the adjustment of the compression amount of the spring 7. Therefore, the valve body 1 can flexibly control the opening pressure of the sealing ball core 6 by compressing the spring 7, which is convenient for the staff to adjust the pressure value of the oil pipe to automatically discharge the gas according to the needs of the pipeline. Since the servo motor 81 is used for electric control, the control accuracy is greatly improved, the operation is simple, and it saves time and effort.
[0042] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.
[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An electric timed air release valve for a heavy oil well head, comprising a valve body (1), wherein a horizontal push chamber (1a) and a pressure relief chamber (1b) are provided in the valve body (1), and an air inlet pipe (2) connected to the push chamber (1a) is fixedly mounted in the middle of the lower surface of the valve body (1), and an air discharge pipe (3) connected to the pressure relief chamber (1b) is fixedly mounted on one end surface of the valve body (1). Features: A push tube (4) is inserted into the push chamber (1a) and connected in a sliding manner. The end of the push tube (4) extends into the pressure relief chamber (1b) and is fixedly mounted with a hollow plunger (5). A sealing ball core (6) for sealing the hollow plunger (5) is installed in the hollow plunger (5). A spring (7) is fixedly mounted on the sealing ball core (6), and the other end of the spring (7) is fixedly mounted on the side wall of the valve body (1); An adjusting component (8) for pushing the hollow plunger (5) to press the spring (7) is installed in the pushing cavity (1a); The valve body (1) is provided with a plurality of annularly distributed U-shaped flow channels (1d), and both openings of the U-shaped flow channels (1d) are connected to the pressure relief chamber (1b).
2. The heavy oil wellhead electric timed air release valve according to claim 1, It is characterized in that The regulating assembly (8) comprises a servo motor (81), the servo motor (81) being fixedly mounted on an end of the valve body (1) away from the exhaust pipe (3) via a frame, and a threaded rod (82) being fixedly mounted on an output end of the servo motor (81), the threaded rod (82) being inserted into the push chamber (1a), and a threaded sleeve (83) being threadedly connected is sleeved on the threaded rod (82), and the threaded sleeve (83) is fixedly connected to a connecting end of the push pipe (4).
3. The heavy oil wellhead electric timed air release valve according to claim 2, It is characterized in that A plurality of limiting ridges (831) distributed in an annular manner and arranged along the axial direction of the threaded sleeve (83) are fixedly mounted on the outer wall of the threaded sleeve (83), and the limiting ridges (831) are respectively inserted into limiting grooves (1c) provided in the valve body (1) and are slidably connected to the limiting grooves (1c).
4. The electric timed air release valve for a heavy oil well according to claim 1, It is characterized in that The hollow plunger (5) is provided with a spherical groove (5a) and an outer expansion cavity (5b) connected to the spherical groove (5a), and the inner diameter of the outer expansion cavity (5b) increases gradually from the spherical groove (5a) towards the exhaust pipe (3).
5. The heavy oil wellhead electric timed air release valve according to claim 4, It is characterized in that The push tube (4) is provided with a plurality of annularly distributed ventilation cavities (4a), and the push tube (4) is in communication with a spherical groove (5a) provided in the hollow plunger (5).
6. The heavy oil wellhead electric timed air release valve according to claim 1, It is characterized in that The inner diameter of the pushing chamber (1a) is smaller than that of the pressure relief chamber (1b), and a plurality of sealing rings (51) are fixedly sleeved on the hollow plunger (5).