Self-adaptive adjusting oil nozzle device for normal-pressure shale gas well

Abstract

The invention discloses a self-adaptive adjusting oil nozzle device for a normal pressure shale gas well, and belongs to the field of oil nozzle devices.The self-adaptive adjusting oil nozzle device comprises a gas well conveying pipe, a parameter detection and control mechanism is installed at one end of the gas well conveying pipe, and a heat preservation mechanism and a pressure relief mechanism are installed on the surface of the parameter detection and control mechanism; the parameter detection and control mechanism comprises a flow detector which is fixedly connected to one end of the gas well conveying pipe through a bolt; through cooperative use of the devices, based on flow and pressure parameters, an existing control system, an existing control algorithm and an existing logic are adopted for analysis, and based on an analysis result, a driving motor is controlled through the control system, so that the driving motor controls a threaded rod to drive a conical valve element to move front and back, and a gap between a sealing plate and a feeding pipe is adjusted; therefore, flow and flow velocity of materials are controlled, wellhead pressure is stabilized at a threshold value, pressure fluctuation is slowed down, stable production period is prolonged, fluid in a shaft is guaranteed to be in an optimal flow state, and gas exhaust efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nozzle devices, in particular to a self-adaptive regulating nozzle device for a normal pressure shale gas well. Background Art

[0002] The nozzle device of a normal-pressure shale gas well is a key device installed at the wellhead or pipeline of a normal-pressure shale gas well. It is mainly used to control and regulate the flow and pressure of shale gas from the wellbore to the ground gathering and transportation system. Its working principle is to control the flow rate and flow of gas by changing the flow area of the nozzle. When the nozzle aperture is increased, the channel for gas outflow becomes wider. Under the same pressure difference, the amount of gas passing through the nozzle per unit time increases, and the flow rate may also increase accordingly; conversely, when the nozzle aperture is decreased, the gas flow rate and flow rate will decrease. In this way, the production of the gas well and the wellhead pressure can be reasonably controlled according to the production situation of the gas well, the requirements of the ground gathering and transportation system, and the characteristics of the shale gas reservoir.

[0003] Most existing normal-pressure shale gas well nozzle devices are generally used by manually controlling the valves in the normal-pressure shale gas well nozzle device through a control system to adjust the flow area of the normal-pressure shale gas well nozzle, control the flow rate and flow rate of gas and liquid, and make the normal-pressure shale gas well nozzle device more suitable for the transmission needs of normal-pressure shale gas wells;

[0004] Although the above method can control the valve and adjust the flow area of the nozzle of the normal-pressure shale gas well to make it more suitable for the transmission requirements of the normal-pressure shale gas well, during the use of the nozzle device of the normal-pressure shale gas well, the nozzle device cannot automatically adjust the opening according to parameters such as the wellbore pressure and flow rate, which may cause the nozzle device to be unable to ensure that the fluid in the wellbore is in the optimal flow state, thereby reducing the gas discharge efficiency, and even causing gas leakage or equipment damage due to improper nozzle opening.

[0005] Therefore, the present invention provides a self-adaptive oil nozzle regulating device for a normal pressure shale gas well to solve the above problems. Summary of the Invention

[0006] (1) Technical problems solved

[0007] The present invention provides a self-adaptive oil nozzle regulating device for a normal pressure shale gas well, aiming to solve the problems raised in the background technology.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention provides the following technical solutions: an adaptive regulating nozzle device for a normal pressure shale gas well, comprising a gas well delivery pipe, one end of which is equipped with a parameter detection and control mechanism, and a surface of which is equipped with a heat preservation mechanism and a pressure relief mechanism;

[0010] The parameter detection and control mechanism includes a flow detector fixedly connected to one end of the gas well delivery pipe by bolts, one end of the flow detector is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to a feed pipe by bolts, one end of the feed pipe is fixedly connected to a regulating tank connected to the feed pipe, the interior of the regulating tank is fixedly connected to a mounting bracket, the surface of the mounting bracket is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to a threaded rod rotatably connected to the interior of the regulating tank, and the surface of the threaded rod is threadedly connected to a conical valve core slidably connected to the feed pipe.

[0011] As a preferred technical solution of the present application, the parameter detection and control mechanism also includes a sealing plate fixedly connected to one side of the conical valve core and threadedly connected to the threaded rod, the sealing plate corresponds to the feed pipe, and one side of the regulating tank is fixedly connected to a discharge pipe corresponding to the feed pipe, and one end of the discharge pipe is fixedly connected to a discharge pipe by bolts.

[0012] As a preferred technical solution of the present application, the insulation mechanism includes an insulation sleeve that is sleeved on the surface of the regulating tank and corresponds to the discharge pipe and the feed pipe. The surface of the insulation sleeve is fixedly connected to an electric heating plate in an annular array.

[0013] As a preferred technical solution of the present application, the insulation mechanism also includes a heat conduction plate fixedly connected to the inner wall of the insulation sleeve and fitted with the regulating tank, and the surface of the heat conduction plate is fixedly connected to a heating sleeve sleeve mounted on the surface of the discharge pipe.

[0014] As a preferred technical solution of the present application, the surfaces of the connecting pipe and the discharge pipe are fixedly connected to pressure sensors, the surfaces of the two pressure sensors are commonly fixedly connected to a support frame, and the two sides of the opposite sides of the support frame are fixedly connected to support rods corresponding to the feed pipe and the discharge pipe in a path array.

[0015] As a preferred technical solution of the present application, the pressure relief mechanism includes a pressure relief pipe fixedly connected to one side of the feed pipe and connected to the feed pipe, one end of the pressure relief pipe is connected to the regulating tank, and a solenoid valve is fixedly connected to the surface of the pressure relief pipe.

[0016] As a preferred technical solution of the present application, the lower surface of the adjusting tank is threadedly connected to an adjusting screw, the surface of the adjusting screw is threadedly connected to a bearing gasket corresponding to the adjusting tank, and the upper surface of the adjusting tank is fixedly connected to a limiting plate by bolts.

[0017] As a preferred technical solution of the present application, the surface of the insulation sleeve is provided with an annular array of installation grooves corresponding one to one with the electric heating plates, and the flow detector, drive motor, solenoid valve and pressure sensor are all electrically connected to the existing control system through wires.

[0018] (3) Beneficial effects

[0019] Through the mutual cooperation of structures such as parameter detection and control mechanisms, after the material inside the gas well enters the flow detector through the gas well delivery pipe, its flow rate is detected, and after the material enters the feed pipe, the material pressure is detected by the corresponding pressure sensor. Based on the flow and pressure parameters, the existing control system, control algorithm and logic are used for analysis, and based on the analysis results, the control system controls the drive motor so that the threaded rod drives the conical valve core to move back and forth, adjusts the gap between the sealing plate and the feed pipe, and thus controls the flow rate and flow velocity of the material, stabilizes the wellhead pressure at the threshold, slows down pressure fluctuations, prolongs the stable production period, and ensures that the fluid in the wellbore is in the best flow state, thereby improving gas discharge efficiency and avoiding gas escape or equipment damage caused by improper nozzle opening;

[0020] Through the cooperation of the insulation mechanism and the pressure relief mechanism, when the material enters the regulating tank through the feed pipe, the temperature drops sharply due to the sudden pressure drop, and the electric heating plate is activated to heat the insulation sleeve, so that the insulation sleeve controls the temperature inside the regulating tank, thereby heating the material entering the regulating tank. When the material is discharged through the discharge pipe and the discharge pipe, the heat conduction plate and the heating sleeve are used to heat and insulate the material again, ensuring that the temperature is higher than the hydrate formation condition, thereby effectively preventing gas hydrates from causing ice blockage to the adaptive regulating nozzle device of the normal pressure shale gas well.

[0021] Two pressure sensors are installed on the connecting pipe and the discharge pipe respectively to monitor the pressure of the material entering and exiting the regulating tank simultaneously, so as to calculate the pressure difference of the material passing through the regulating tank. The nozzle opening is adjusted according to the pressure difference data, making the control of the conical valve core flow more precise, thereby avoiding equipment damage caused by sudden pressure rise or production capacity waste caused by sudden pressure drop. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a self-adaptive oil nozzle regulating device for a normal pressure shale gas well;

[0023] Figure 2 This is a schematic structural diagram of a self-adaptive oil nozzle regulating device for a normal pressure shale gas well from a second perspective;

[0024] Figure 3 This is a schematic diagram of the structure of a regulating tank and a thermal insulation sleeve in an adaptive regulating nozzle device for a normal pressure shale gas well;

[0025] Figure 4 This is a schematic diagram of the structure of a heat-insulating sleeve and a discharge pipe in a self-adaptive oil nozzle regulating device for a normal-pressure shale gas well;

[0026] Figure 5 This is a schematic diagram of the structure of a regulating tank, a thermal insulation sleeve, and a conical valve core in an adaptive regulating nozzle device for a normal pressure shale gas well;

[0027] Figure 6 An adaptive oil nozzle device for normal pressure shale gas wells Figure 3 Enlarged structural diagram at point A in the middle.

[0028] In the picture:

[0029] 1. Gas well delivery pipe; 2. Flow meter; 3. Connecting pipe; 4. Feed pipe; 5. Regulating tank; 6. Mounting bracket; 7. Drive motor; 8. Threaded rod; 9. Conical valve core; 10. Sealing plate; 11. Discharge pipe; 12. Discharge pipe; 13. Insulation sleeve; 14. Electric heating plate; 15. Heat conduction plate; 16. Heating sleeve; 17. Pressure sensor; 18. Support bracket; 19. Support rod; 20. Pressure relief pipe; 21. Solenoid valve; 22. Adjusting screw; 23. Load-bearing gasket. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides a self-adaptive oil nozzle regulating device for a normal pressure shale gas well, such as Figures 1-6 As shown, the adaptive regulating nozzle device for a normal pressure shale gas well includes a gas well delivery pipe 1, one end of which is installed with a parameter detection and control mechanism, which includes a flow detector 2 fixedly connected to one end of the gas well delivery pipe 1 by bolts, one end of the flow detector 2 is fixedly connected to a connecting pipe 3, one end of the connecting pipe 3 is fixedly connected to a feed pipe 4 by bolts, and one end of the feed pipe 4 is fixedly connected to a regulating tank 5 connected to the feed pipe 4. The material inside the gas well is transported to the inside of the flow detector 2 through the gas well delivery pipe 1, and its flow rate is detected. At the same time, the material enters the inside of the regulating tank 5 through the arrangement of the connecting pipe 3 and the feed pipe 4.

[0032] The lower surface of the regulating tank 5 is threadedly connected to an adjusting screw rod 22, and the surface of the adjusting screw rod 22 is threadedly connected to a bearing gasket 23 corresponding to the regulating tank 5. Through the mutual cooperation of the adjusting screw rod 22 and the bearing gasket 23, the regulating tank 5 can be adjusted in height as required, so that the regulating tank 5 can be adapted to feed pipes 4 and gas well delivery pipes 1 of different heights, thereby improving the practicality of the adaptive regulating nozzle device for atmospheric shale gas wells.

[0033] The upper surface of the regulating tank 5 is fixedly connected to a limit plate by bolts. The setting of the limit plate limits the thermal insulation sleeve 13, making it more convenient to replace and use the thermal insulation sleeve 13. Moreover, the limit plate is fixedly connected to the regulating tank 5 by bolts. After the bolts are removed, the limit plate is separated from the regulating tank 5 and the regulating tank 5 is no longer sealed, thereby facilitating the maintenance of the internal components of the regulating tank 5.

[0034] The interior of the regulating tank 5 is fixedly connected to a mounting bracket 6, the surface of the mounting bracket 6 is fixedly connected to a drive motor 7, the output end of the drive motor 7 is fixedly connected to a threaded rod 8 rotatably connected to the interior of the regulating tank 5, the surface of the threaded rod 8 is threadedly connected to a conical valve core 9 slidably connected to the feed pipe 4, and the pressure of the material flowing through is simultaneously detected by a corresponding pressure sensor 17. Based on the detection results of the flow rate and pressure, an existing control system, control algorithm and logic are used for analysis, and based on the analysis results, the drive motor 7 is controlled by the control system so that its output end drives the threaded rod 8 to rotate inside the regulating tank 5;

[0035] The parameter detection and control mechanism also includes a sealing plate 10 fixedly connected to one side of the conical valve core 9 and threadedly connected to the threaded rod 8. The sealing plate 10 corresponds to the feed pipe 4. When the threaded rod 8 rotates, the conical valve core 9 and the sealing plate 10 are driven to move, so that the conical valve core 9 slides inside the feed pipe 4, so that a gap is generated between the sealing plate 10 and the feed pipe 4, so that the material enters the regulating tank 5 through the gap, and the flow rate and flow velocity of the material entering the regulating tank 5 are controlled, so that the wellhead pressure is stabilized at the threshold value, the pressure fluctuation is reduced, the stable production period is extended, and the fluid in the wellbore is ensured to be in the optimal flow state;

[0036] One side of the regulating tank 5 is fixedly connected to a discharge pipe 11 corresponding to the feed pipe 4. One end of the discharge pipe 11 is fixedly connected to a discharge pipe 12 by a bolt. The material is discharged through the discharge pipe 11 so that the material enters the discharge pipe 12 for discharge. The surfaces of the connecting pipe 3 and the discharge pipe 12 are fixedly connected with pressure sensors 17. Based on the setting of the two pressure sensors 17, the pressure of the logistics flow in the connecting pipe 3 and the discharge pipe 12 is detected respectively, so as to calculate the pressure difference of the material passing through the regulating tank 5. The nozzle opening is adjusted according to the pressure difference data, so that the flow control of the conical valve core 9 is more accurate, thereby avoiding equipment damage caused by a sudden increase in pressure or waste of production capacity caused by a sudden drop in pressure;

[0037] The surfaces of the two pressure sensors 17 are fixedly connected to a support frame 18. On opposite sides of the support frame 18, support rods 19 corresponding to the feed pipe 4 and the discharge pipe 11 are fixedly connected in a path array. The support frame 18 and the support rods 19 support the pressure sensors 17, thereby making the pressure sensors 17 more stable during use.

[0038] The surface of the parameter detection and control mechanism is equipped with a heat preservation mechanism and a pressure relief mechanism. The heat preservation mechanism includes a heat preservation sleeve 13 which is sleeved on the surface of the regulating tank 5 and corresponds to the discharge pipe 11 and the feed pipe 4. The surface of the heat preservation sleeve 13 is fixedly connected to an electric heating plate 14 in an annular array. By starting the electric heating plate 14, the heat preservation sleeve 13 is heated, so that the heat preservation sleeve 13 controls and keeps the temperature of the regulating tank 5 warm, thereby heating the material inside the regulating tank 5. The surface of the heat preservation sleeve 13 is provided with a ring array with mounting grooves which correspond one to one with the electric heating plate 14. The setting of the mounting groove makes the electric heating plate 14 more stable when in use.

[0039] The heat preservation mechanism also includes a heat conducting plate 15 fixedly connected to the inner wall of the heat preservation sleeve 13 and in contact with the regulating tank 5. The surface of the heat conducting plate 15 is fixedly connected to a heating sleeve 16 sleeved on the surface of the discharge pipe 11. When the material enters the discharge pipe 11, the temperature inside the heat preservation sleeve 13 is transmitted based on the heat conducting plate 15, so that the heat is transferred to the heating sleeve 16, heating the material inside the discharge pipe 11, ensuring that the temperature is higher than the hydrate formation condition, thereby effectively preventing gas hydrates from causing ice blockage to the adaptive regulating nozzle device of the atmospheric shale gas well.

[0040] The pressure relief mechanism includes a pressure relief pipe 20 fixedly connected to one side of the feed pipe 4 and communicated with the feed pipe 4. One end of the pressure relief pipe 20 is communicated with the regulating tank 5. A solenoid valve 21 is fixedly connected to the surface of the pressure relief pipe 20. When the pressure of the pressure sensor 17 corresponding to the connecting pipe 3 is too high, the solenoid valve 21 is started based on the control system so that it no longer seals the pressure relief pipe 20, so that the material can enter the interior of the regulating tank 5 through the pressure relief pipe 20, avoiding large pressure fluctuations and affecting the flow rate. The flow detector 2, drive motor 7, solenoid valve 21 and pressure sensor 17 are all electrically connected to the existing control system through wires.

[0041] Specifically, when the adaptive regulating nozzle device for normal pressure shale gas wells is in use, the material inside the gas well is transported to the inside of the flow detector 2 through the gas well delivery pipe 1, and its flow is detected. At the same time, the material enters the inside of the regulating tank 5 through the setting of the connecting pipe 3 and the feed pipe 4, and the pressure of the material flowing through is detected by the corresponding pressure sensor 17. Based on the detection results of the flow and pressure, the existing control system, control algorithm and logic are used for analysis. Based on the analysis results, the control system controls the driving motor 7 so that its output end drives the threaded rod 8 to rotate inside the regulating tank 5, so that the conical valve core 9 slides inside the feed pipe 4, so that a gap is generated between the sealing plate 10 and the feed pipe 4, so that the material enters the regulating tank 5 through the gap, and the flow rate and flow velocity of the material entering the regulating tank 5 are controlled, so that the wellhead pressure is stabilized at the threshold value, the pressure fluctuation is reduced, the stable production period is extended, and it is ensured that the fluid in the wellbore is in the optimal flow state.

[0042] After the material enters the regulating tank 5, the electric heating plate 14 is started to heat the insulation sleeve 13, so that the insulation sleeve 13 controls and keeps the temperature of the regulating tank 5 warm, thereby heating the material inside it. The material is then discharged through the discharge pipe 11, so that the material enters the discharge pipe 12 for discharge. When the material enters the discharge pipe 11, the temperature inside the insulation sleeve 13 is transferred based on the heat conduction plate 15, so that the heat is transferred to the heating sleeve 16, and the material inside the discharge pipe 11 is heated, ensuring that the temperature is higher than the hydrate formation condition, thereby effectively preventing gas hydrates from causing ice blockage to the adaptive regulating nozzle device of the normal pressure shale gas well;

[0043] At the same time, based on the setting of two pressure sensors 17, the pressure of the logistics flow in the connecting pipe 3 and the discharge pipe 12 is detected respectively, so as to calculate the pressure difference of the material passing through the regulating tank 5, and adjust the oil nozzle opening according to the pressure difference data, so that the flow control of the conical valve core 9 is more precise, thereby avoiding equipment damage caused by a sudden increase in pressure or waste of production capacity caused by a sudden drop in pressure. When the pressure of the pressure sensor 17 corresponding to the connecting pipe 3 is too high, the solenoid valve 21 is started based on the control system so that it no longer seals the pressure relief pipe 20, so that the material can enter the interior of the regulating tank 5 through the pressure relief pipe 20, avoiding large fluctuations in pressure and affecting the flow.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An adaptive oil nozzle adjustment device for atmospheric shale gas wells, characterized by: It comprises a gas well delivery pipe (1), one end of which is equipped with a parameter detection and control mechanism, and a heat preservation mechanism and a pressure relief mechanism are installed on the surface of the parameter detection and control mechanism; The parameter detection and control mechanism comprises a flow detector (2) fixedly connected to one end of a gas well delivery pipe (1) by means of bolts, one end of the flow detector (2) is fixedly connected to a connecting pipe (3), one end of the connecting pipe (3) is fixedly connected to a feed pipe (4) by means of bolts, one end of the feed pipe (4) is fixedly connected to a regulating tank (5) connected to the feed pipe (4), the interior of the regulating tank (5) is fixedly connected to a mounting frame (6), the surface of the mounting frame (6) is fixedly connected to a driving motor (7), the output end of the driving motor (7) is fixedly connected to a threaded rod (8) rotatably connected to the interior of the regulating tank (5), and the surface of the threaded rod (8) is threadedly connected to a conical valve core (9) slidably connected to the feed pipe (4).

2. The adaptive oil nozzle adjustment device for atmospheric shale gas wells according to claim 1 is characterized in that: The parameter detection and control mechanism further comprises a sealing plate (10) fixedly connected to one side of the conical valve core (9) and threadedly connected to the threaded rod (8), wherein the sealing plate (10) corresponds to the feed pipe (4), and a discharge pipe (11) corresponding to the feed pipe (4) is fixedly connected to one side of the regulating tank (5), and one end of the discharge pipe (11) is fixedly connected to a discharge pipe (12) via a bolt.

3. The adaptive oil nozzle adjustment device for atmospheric shale gas wells according to claim 2, characterized in that: The heat-insulating mechanism comprises a heat-insulating sleeve (13) sleeved on the surface of the regulating tank (5) and corresponding to the discharge pipe (11) and the feed pipe (4); the surface of the heat-insulating sleeve (13) is fixedly connected to an electric heating plate (14) in a circular array.

4. The adaptive choke device for atmospheric shale gas wells according to claim 3, characterized in that: The heat-insulating mechanism further comprises a heat-conducting plate (15) fixedly connected to the inner wall of the heat-insulating sleeve (13) and fitted with the regulating tank (5); a heating sleeve (16) sleeved on the surface of the discharge pipe (11) is fixedly connected to the surface of the heat-conducting plate (15).

5. The adaptive oil nozzle adjustment device for atmospheric shale gas wells according to claim 3 is characterized in that: The surfaces of the connecting pipe (3) and the discharge pipe (12) are both fixedly connected to pressure sensors (17), and the surfaces of the two pressure sensors (17) are commonly fixedly connected to a support frame (18), and the two sides of the opposite sides of the support frame (18) are fixedly connected to support rods (19) corresponding to the feed pipe (4) and the discharge pipe (11) in a path array.

6. The adaptive choke device for atmospheric shale gas wells according to claim 5, characterized in that: The pressure relief mechanism comprises a pressure relief pipe (20) fixedly connected to one side of the feed pipe (4) and communicated with the feed pipe (4); one end of the pressure relief pipe (20) is communicated with the regulating tank (5); and a solenoid valve (21) is fixedly connected to the surface of the pressure relief pipe (20).

7. The adaptive choke device for atmospheric shale gas wells according to claim 1, characterized in that: The lower surface of the regulating tank (5) is threadedly connected to an regulating screw (22), the surface of the regulating screw (22) is threadedly connected to a bearing gasket (23) corresponding to the regulating tank (5), and the upper surface of the regulating tank (5) is fixedly connected to a limit plate by bolts.

8. The adaptive choke device for atmospheric shale gas wells according to claim 6, characterized in that: The surface of the heat-insulating sleeve (13) is provided with mounting grooves in a circular array corresponding to the electric heating plates (14). The flow detector (2), the drive motor (7), the solenoid valve (21) and the pressure sensor (17) are all electrically connected to the existing control system through wires.

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