Flow control device capable of replacing oil nozzle

Abstract

According to the flow control device capable of replacing the oil nozzle, the valve body provided with the valve plate moving groove, the throttling orifice plate and the connector is connected with the valve deck, overflowing holes in the throttling orifice plate are different in hole diameter and longitudinally arranged in the plate body, the throttling orifice plate is attached to and fixed to one side of the valve plate moving groove, and the throttling orifice plate is connected with the valve deck. A valve plate mounted in the valve plate moving groove is fixed at the lower end of the valve rod; a driving motor and a manual operation part of the temperature and pressure self-control instrument are connected with external threads at the upper part of the shaft sleeve above the gland; the valve rod is connected with an internal thread of a central hole of the shaft sleeve and penetrates through the gland, a driving motor of the temperature and pressure self-control instrument and a manual operation part; a temperature and pressure probe of a temperature and pressure automatic control instrument installed in the valve body is connected with a control module of the temperature and pressure automatic control instrument through a data transmission line. The device solves the problems that when the oil nozzle is replaced, a production valve needs to be frequently opened and closed, so that adverse effects on an oil well are caused, environmental pollution caused by pressure relief and oil stain discharge is caused, and follow-up treatment cost and treatment workload are caused.

Description

Technical Field

[0001] The utility model relates to a wellhead flow control device for an oil well in the petroleum industry, in particular to a flow control device which can replace an oil nozzle. Background Art

[0002] In the petroleum industry, oil production wells all use nozzles to control flow and thereby control production. When the nozzle is used in a self-flowing production well as a production control device in the production process or as a pressure relief and blowout control device for heavy oil steam injection wells to switch to cyclic self-flowing production, both the self-flowing production wells and the heavy oil steam injection production wells need to regularly replace the nozzles at the wellhead according to the wellhead pressure and temperature and changes. Generally, it is necessary to go through a process of gradually selecting 2mm, 4mm, 6mm, 8mm, and 10mm nozzles and then pulling out the nozzle for blowout, so as to select the appropriate nozzle and achieve a reasonable production pressure difference and working state, thereby ensuring long-term high and stable production of the self-flowing oil well or making the blowout process of the steam injection production well go smoothly.

[0003] Conventional nozzles installed in wellheads have a single aperture. When the nozzles in these wellheads are used for blowout in heavy oil steam injection wells, impurities and other substances in the well formation can easily clog the nozzle aperture, impacting the well's flowing production. Currently, the traditional method for selecting nozzles for flowing production wells and for heavy oil steam injection production wells requires the following steps: shutting down the well, depressurizing, removing the plug, cleaning, replacing the nozzle, installing the plug, and resuming the process. A single blowout cycle for a single oil well requires multiple nozzle changes. This frequent switching of the well causes fluctuations in the well's pressure differential, negatively impacting well production. Furthermore, the oil discharged during the pressure relief and nozzle selection process can easily pollute the environment and incur subsequent treatment costs, seriously impacting the clean production of the well.

[0004] In order to solve the above problems, the following patented technologies have appeared in the production site: Authorization announcement number CN219840617U discloses a nozzle for controlling oil well production, which relates to the field of nozzle technology and includes a convenient disassembly mechanism, wherein the inner surface wall of the convenient disassembly mechanism is fixedly inserted with a main body mechanism. In the above utility model, a lower die groove is provided on the top of the lower die sleeve, and an upper die groove is provided on the bottom of the upper die sleeve. The main body, spacer sleeve, nozzle and other equipment are respectively inserted into the corresponding places of the lower die groove according to different functions, and then the upper die sleeve is fixedly installed on the top of the lower die sleeve. In addition, because the outer surface wall of the lower die sleeve is fixedly installed with two fixing plates, and the tops of the two fixing plates are provided with multiple holes, and the outer surface wall of the upper die sleeve is fixedly installed with two extension plates, and the tops of the two extension plates are provided with multiple fixing holes, when the nozzle in the injector is blocked, the staff only needs to remove the multiple fixings to inspect and repair its internal equipment, thereby improving the work efficiency of the staff's inspection and maintenance.

[0005] The above utility model has a simple structure and is easy to disassemble, but it still requires multiple replacements of oil nozzles with different apertures.

[0006] Authorization announcement number CN213574033U discloses an interchangeable oil nozzle device, comprising a valve body and a rotor rotating in the valve body, the rotor being connected to a control device for controlling the rotation angle, an oil inlet, a first oil outlet, and a second oil outlet located on the same horizontal plane being provided in the valve body, the first oil outlet and the second oil outlet being respectively provided with a first oil nozzle and a second oil nozzle of different specifications, the rotor being provided with a first oil passage for connecting the oil inlet and the first oil outlet and a second oil passage for connecting the oil inlet and the second oil outlet, the first oil passage and the second oil passage not intersecting; in an initial state, the first oil passage is aligned with the oil inlet, and after rotating a specific angle, the second oil passage is aligned with the oil inlet. The interchangeable oil nozzle device of the utility model has a reasonable and compact structure, is easy to use, can effectively complete the interchange of oil nozzles, and realizes the adjustment of flow and pressure, greatly reduces the labor intensity compared to manual replacement of oil nozzles, and can realize the replacement of oil nozzles without stopping production, thereby improving the production efficiency of oil wells.

[0007] However, the above utility model can only replace two channels, which cannot meet the need of replacing the oil nozzle multiple times when the oil well is gushing out.

[0008] Authorization announcement number CN202202849U discloses a multi-aperture adjustable oil well blowout nozzle, which is suitable for newly-commissioned oil wells or steam injection wells. It can effectively improve the blowout efficiency of oil wells and facilitate production management. The above-mentioned blowout nozzle includes a nozzle and a nozzle sleeve. The nozzle is installed at one end of the operating rod and connected to the inner circle above the liquid outlet of the nozzle sleeve. A threaded plug is installed on the lower inner circle of the nozzle sleeve, and the aperture of the nozzle is changed by the operating rod. The above-mentioned device has a simple structure and is easy to operate. According to the needs of oil well blowout, the operating rod can be rotated under pressure to adjust and replace the required nozzle aperture to achieve the purpose of rapid blowout. It reduces a series of operating procedures for replacing the nozzle and shortens the blowout time. It can meet the nozzle aperture requirements of the entire blowout process, reduce the use of different nozzles, and save materials. The above-mentioned device is easy to install, safe to use, and reliable in operation. It greatly reduces the labor intensity of workers and improves work efficiency.

[0009] However, when the oil nozzle is replaced in the above utility model, the production gate still needs to be closed. The operation of repeatedly operating and rotating the operating lever in the utility model and closing the production gate will still have a negative impact on the production of the oil well.

[0010] The pressure relief control devices of heavy oil thermal recovery wells and the flow control devices of self-flowing oil wells and conventional oil wells still need to be improved. Summary of the Invention

[0011] The purpose of this utility model is to provide a flow control device that can replace a nozzle, addressing the adverse effects on oil wells caused by the need to close the production valve when replacing the nozzle, as well as the environmental pollution and subsequent treatment costs caused by the oil discharge caused by pressure relief in heavy oil steam injection production wells. This device improves the efficiency of wellhead pressure relief, provides conditions for clean production of oil wells, protects the environment, avoids treatment costs caused by environmental pollution, and reduces production costs.

[0012] The technical solution of the utility model is: a flow control device that can replace the oil nozzle, provided with a throttling orifice plate, wherein: a valve body provided with a valve plate moving groove, a throttling orifice plate and an interface is connected to a valve cover, the apertures of the flow holes in the throttling orifice plate are different and are arranged longitudinally in the plate body, the throttling orifice plate is attached to and fixed on one side of the valve plate moving groove; the valve plate installed in the valve plate moving groove is fixed to the lower end of the valve stem, and the valve stem passes through a pressure cap installed in the valve cover and is threadedly connected to a manual operating component.

[0013] Preferably, the inner cavity of the valve cover is a non-equal diameter inner cavity and the lower inner cavity is larger than the upper inner cavity and a partition with a center hole is provided between the upper inner cavity and the middle inner cavity, wherein: a power-boosting bearing, a sleeve and a pressure cover are installed in the upper inner cavity above the partition, the power-boosting bearing is installed on both sides of the lower body of the sleeve, the pressure cover is installed on the outside of the upper body of the sleeve and is threadedly connected to the upper inner cavity of the valve cover; the manual operating component is connected to the external thread of the upper part of the sleeve above the pressure cover; the valve plate is fixedly connected to the valve stem below the partition, and the valve stem is connected to the internal thread of the center hole of the sleeve and passes through the pressure cover and the manual operating component.

[0014] Preferably, the throttling orifice plate is made of stainless steel and the flow holes therein are arranged longitudinally from bottom to top and from small to large; the external thread of the valve stem and the internal thread of the sleeve connected to the valve stem are both fine threads; a valve body sealing ring is also installed between the valve cover and the valve body, and a pressure cover sealing ring is installed between the pressure cover and the valve cover.

[0015] Preferably, the lower end of the valve plate is arc-shaped or straight-line-shaped, and the outer end face of the interface is provided with a groove and can be connected to the connecting hoop; when a valve plate with a straight-line lower end is used, a valve plate sedimentation cavity is provided at the bottom of the valve body, and the valve plate sedimentation cavity corresponds to the valve plate moving groove.

[0016] Preferably, the manual operating component is a hand wheel or a handle, and a screw indicator shield provided with a valve stem movement distance scale is also fixed to the upper end surface of the sleeve, and the screw indicator shield covers the valve stem.

[0017] A flow control device that can replace an oil nozzle is provided with a throttling orifice plate, wherein: a valve body provided with a valve plate moving groove, a throttling orifice plate and an interface is connected to a valve cover, the apertures of the flow holes in the throttling orifice plate are different and are arranged longitudinally in the plate body, the throttling orifice plate is abutted and fixed on one side of the valve plate moving groove, the valve plate installed in the valve plate moving groove is fixed to the lower end of the valve stem; a shaft sleeve and a pressure cover equipped with a power-assisting bearing are installed in the upper inner cavity of the valve cover, the pressure cover is installed on the outside of the upper body of the shaft sleeve and is threadedly connected to the upper inner cavity of the valve cover; a driving motor and a manual operating component of a temperature and pressure automatic controller are connected to the external thread on the upper part of the shaft sleeve above the pressure cover; the valve stem is connected to the internal thread of the center hole of the shaft sleeve and passes through the pressure cover, the driving motor and the manual operating component of the temperature and pressure automatic controller; a temperature and pressure probe of the temperature and pressure automatic controller installed in the valve body is connected to the control module of the temperature and pressure automatic controller through a data transmission line.

[0018] Preferably, the inner cavity of the valve cover is a non-equal diameter inner cavity and the lower inner cavity is larger than the upper inner cavity and a partition with a center hole is provided between the upper inner cavity and the middle inner cavity, wherein: a power-boosting bearing, a shaft sleeve and a pressure cover are installed in the upper inner cavity above the partition, the power-boosting bearing is installed on both sides of the lower body of the shaft sleeve, the pressure cover is installed on the outside of the upper body of the shaft sleeve and is threadedly connected to the upper inner cavity of the valve cover; the valve plate is fixedly connected to the valve stem below the partition, and the valve stem is connected to the internal thread of the center hole of the shaft sleeve and passes through the pressure cover and the manual operating component.

[0019] Preferably, the throttling orifice plate is made of stainless steel and the flow holes therein are arranged longitudinally from bottom to top and from small to large; the lower end of the valve plate is arc-shaped or straight-line-shaped, and the outer end face of the interface is provided with a groove and can be connected to the connecting hoop; when a valve plate with a straight-line lower end is used, a valve plate sedimentation cavity is provided at the bottom of the valve body, and the valve plate sedimentation cavity corresponds to the valve plate moving groove.

[0020] Preferably, the manual operating component is a hand wheel or a handle, and a screw indicator shield provided with a valve stem movement distance scale is fixed to the upper end surface of the sleeve, and the screw indicator shield covers the valve stem.

[0021] Preferably, the temperature and pressure probe is fixed in the horizontal tube on one side of the valve body through a probe gasket and a probe pressure cover; the external thread of the valve stem and the internal thread of the sleeve connected to the valve stem are both fine threads; a valve body sealing ring is also installed between the valve cover and the valve body, and a pressure cover sealing ring is installed between the pressure cover and the valve cover.

[0022] Compared with the prior art, the utility model has the following significant effects: the utility model is suitable for installation in heavy oil steam injection and release blowout wells, self-flowing production wells and conventional oil production wells that require frequent replacement of oil nozzles, and is particularly suitable for installation in heavy oil steam injection and release blowout wells and self-flowing production wells. Its specific advantages are as follows.

[0023] (1) This utility model removes the nozzle sleeve with the nozzle in the wellhead assembly without changing any of the original wellhead structures, and uses this device to replace the nozzle to control the flow of the oil well. During installation, the device can be connected between the production valve and the blowdown line or process pipeline using a coupling through the interface of the valve body of the device, and its installation is convenient and quick.

[0024] (2) The device has a reasonable and compact structure and is easy to use. It can be quickly installed and interchanged with the nozzle sleeve, allowing the flow and pressure in the oil well installed with the device to be adjusted conveniently and quickly. It solves the adverse effects on the oil well caused by the need to frequently open and close the production valve when replacing the nozzle, as well as the environmental pollution caused by the pressure relief and discharge of oil pollution, and the subsequent processing costs and processing workload.

[0025] (3) While reducing the damage to the formation caused by frequent opening and closing of wells, it significantly improves the efficiency of wellhead pressure relief of oil wells and production control of self-flowing production wells and conventional oil wells, provides conditions for clean production of oil wells, protects the environment, avoids the treatment costs caused by environmental pollution, and significantly reduces production costs.

[0026] (4) When the device is installed in a heavy oil blowout well and used for blowout and pressure relief, there is no need to frequently replace the oil nozzle according to the pressure and temperature changes of the oil well. This not only simplifies the process but also makes the adjustment of the blowout volume more precise, and eliminates the pollutants generated by the blowout during the construction process.

[0027] (5) This device is equipped with two flow control modes: automatic adjustment and manual adjustment. It can be easily switched according to the actual situation on site, which is more in line with the needs of the production site.

[0028] The device is easy to install and connect, safe and reliable in operation, and can be operated by one person for automatic or manual adjustment, saving time and effort and significantly improving work efficiency. After using the utility model, the frequent replacement of oil nozzles no longer affects the oil well opening rate and the adverse effects on the formation, significantly reducing the labor intensity of workers and reducing production costs, with significant use effects and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a cross-sectional view of the structural schematic diagram of the present utility model.

[0031] Figure 2 yes Figure 1 Schematic diagram of the appearance.

[0032] In the figure: valve body 1, valve plate moving groove 1-1, valve plate sedimentation cavity 1-2; valve cover 2, manual operating component 3, screw indicator shield 4, temperature and pressure probe 5; throttle orifice 6, flow hole 6-1; power-assisting bearing 7, bushing 8, gland 9, valve stem 10, valve body sealing ring 11, valve stem sealing ring 12, interface 13, drive motor 14, gate 15, data transmission line 16, probe gasket 17, probe gland 18. DETAILED DESCRIPTION

[0033] The accompanying drawings are for reference and illustration purposes only and are not intended to limit the scope of protection of the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0036] See also Figure 1-Figure 2 , a flow control device that can replace an oil nozzle, is provided with a throttling orifice plate 6, wherein: a valve body 1 provided with a valve plate moving groove 1-1, a throttling orifice plate 6 and an interface 13 is connected to a valve cover 2, the apertures of the flow holes 6-1 in the throttling orifice plate 6 are different and are arranged longitudinally in the plate body, and the throttling orifice plate 6 is attached to and fixed on one side of the valve plate moving groove 1-1; a valve plate 15 installed in the valve plate moving groove 1-1 is fixed to the lower end of a valve stem 10, and the valve stem 10 passes through a pressure cap 9 installed in the valve cover 2 and is threadedly connected to a manual operating component 3.

[0037] The above is a manual flow control device. The throttling orifice plate 6 is provided with flow holes 6-1 of different diameters and arranged longitudinally within the plate body. The valve plate 15 is fixed to the lower end of the valve stem 10. Because the manual operating component 3 is threadedly connected to the valve stem 10 and the valve plate 15 is mounted in the valve plate movable groove 1-1, rotating the manual operating component 3 can cause the valve stem 10 to move up and down within the manual operating component 3. Driven by the valve stem 10, the valve plate 15, mounted in the valve plate movable groove 1-1, can move up and down against the throttling orifice plate 6, blocking the flow holes 6-1 of different diameters. This is equivalent to replacing a nozzle of a different diameter, achieving the purpose of controlling the wellhead flow and pressure.

[0038] The manual-operated device can be connected via interface 13 between the production valve and production pipeline of a wellhead assembly. This eliminates the need to open and close the production valve in the wellhead, enabling operations such as replacing flow holes 6-1 in flowing wells, adjusting production, and releasing pressure in heavy oil steam injection wells. The device can also be installed between the production valve and production pipeline at the wellhead of a conventional oil production well, reducing the workload for workers replacing nozzles and adjusting well production.

[0039] Based on the above embodiment 1, the present invention also has the following embodiments:

[0040] A preferred embodiment: the inner cavity of the valve cover 2 is a non-equal diameter inner cavity and the lower inner cavity is larger than the upper inner cavity and a partition with a center hole is provided between the upper inner cavity and the middle inner cavity, wherein: a power-assisting bearing 7, a sleeve 8 and a pressure cover 9 are installed in the upper inner cavity above the partition, the power-assisting bearing 7 is installed on both sides of the lower body of the sleeve 8, the pressure cover 9 is installed on the outside of the upper body of the sleeve 8 and is threadedly connected to the upper inner cavity of the valve cover 2; the manual operating component 3 is connected to the external thread of the upper part of the sleeve 8 above the pressure cover 9; the valve plate 15 is fixedly connected to the valve stem 10 below the partition, and the valve stem 10 is connected to the internal thread of the center hole of the sleeve 8 and passes through the pressure cover 9 and the manual operating component 3.

[0041] In order to make the manual operation of the present invention convenient and easy, in this embodiment, a power-boosting bearing 7 and a sleeve 8 are added, and the sleeve 8 equipped with the power-boosting bearing 7 is installed and fixed in the valve cover 2 through the pressure cover 9, so that the valve stem 10 is connected to the internal thread of the sleeve 8, and the manual operating component 3 is connected to the external thread on the upper part of the sleeve 8. As long as the manual operating component 3 is gently turned, the valve stem 10 can be smoothly moved up and down under the action of the power-boosting bearing 7, and the flow of the device can be conveniently and quickly controlled through the valve plate 15.

[0042] In a preferred embodiment, the throttle orifice plate 6 is made of stainless steel, and the flow holes 6-1 therein are arranged longitudinally from bottom to top and from small to large. The inner diameter of the flow holes 6-1 in the throttle orifice plate 6 can be 1mm, 2mm, 3mm, 4mm, etc. from bottom to top. The throttle orifice plate 6 fits tightly against the gate plate 15, and the two cooperate with each other to control and regulate the oil well production. The external thread of the valve stem 10 and the internal thread of the shaft sleeve 8 connected to the valve stem 10 are both fine threads, which can meet the requirements of continuous and precise adjustment of the discharge flow rate. A valve body sealing ring 11 is also installed between the valve cover 2 and the valve body 1, and a gland sealing ring 12 is installed between the gland 9 and the valve cover 2 to ensure the sealing performance of the device.

[0043] A preferred embodiment: the lower end of the valve plate 15 is arc-shaped or straight-line-shaped, the outer end face of the interface 13 is provided with a groove and can be connected to the connecting hoop, so that the device can be conveniently connected to the production valve and process pipeline in the wellhead process; when using a valve plate 15 with a straight lower end, a valve plate settling chamber 1-2 is provided at the bottom of the valve body 1, and the valve plate settling chamber 1-2 corresponds to the valve plate moving groove 1-1, so that the straight-line valve plate 15 can be used to enter the valve plate settling chamber 1-2, adjust the flow to the minimum and close the wellhead process.

[0044] In a preferred embodiment, the manual operating component 3 is a handwheel or handle. A screw indicator shield 4, marked with a valve stem travel distance scale, is also secured to the upper end surface of the shaft sleeve 8. The screw indicator shield 4 secures the valve stem 10 therein. By securing the scaled screw indicator shield 4 to the shaft sleeve 8, the opening and closing degree of the device can be precisely adjusted. Furthermore, since the device operates outdoors, damage to the valve stem 10 can be reduced, extending its service life and thus protecting the device.

[0045] A flow control device capable of replacing an oil nozzle, comprising a throttling orifice plate 6, wherein: a valve body 1 having a valve plate moving groove 1-1, a throttling orifice plate 6, and an interface 13 is connected to a valve cover 2, wherein the flow holes 6-1 in the throttling orifice plate 6 have different apertures and are arranged longitudinally in the plate body, the throttling orifice plate 6 is abutted against and fixed to one side of the valve plate moving groove 1-1, a valve plate 15 installed in the valve plate moving groove 1-1 is fixed to the lower end of a valve stem 10; a shaft sleeve 8 equipped with a power-assisting bearing 7 and a pressure cover 9 are installed in the upper portion of the valve cover 2 In the cavity, the pressure cap 9 is installed on the outside of the upper body of the sleeve 8 and is threadedly connected to the upper inner cavity of the valve cover 2; the drive motor 14 and the manual operation component 3 of the temperature and pressure automatic controller are connected to the external thread of the upper part of the sleeve 8 above the pressure cap 9; the valve stem 10 is connected to the internal thread of the center hole of the sleeve 8 and passes through the pressure cap 9, the drive motor 14 and the manual operation component 3 of the temperature and pressure automatic controller; the temperature and pressure probe 5 of the temperature and pressure automatic controller installed in the valve body 1 is connected to the control module of the temperature and pressure automatic controller through the data transmission line 16.

[0046] The above is a manual-electric integrated flow control device. The throttling orifice plate 6 is provided with flow holes 6-1 of different apertures and arranged longitudinally in the plate body. The valve plate 15 is fixed to the lower end of the valve stem 10. Since the drive motor 14 of the temperature and pressure automatic controller and the manual operating component 3 are threadedly connected to the shaft sleeve 8 and the valve plate 15 is installed in the valve plate moving groove 1-1, rotating the manual operating component 3 or operating the temperature and pressure automatic controller can make the valve stem 10 move up and down under the drive of the manual operating component 3 and the drive motor 14. Driven by the valve stem 10, the valve plate 15 installed in the valve plate moving groove 1-1 can move up and down against the throttling orifice plate 6, blocking the flow holes 6-1 of different apertures and achieving the purpose of controlling the flow.

[0047] The aforementioned integrated manual and electric valve of the present invention can be connected between the production valve and the process pipeline of the wellhead assembly via interface 13. The operator can program the drive motor 14 on the control panel of the temperature and pressure controller based on the temperature and pressure measured by the temperature and pressure probe 5 of the temperature and pressure controller installed in the valve body 1. Using changes in the temperature or pressure of the liquid or gas, the motor 14 is controlled via the shaft sleeve 8 to rotate the valve stem 10, adjusting or closing the opening of the throttle orifice 6, thereby enabling the temperature and pressure controller to automatically control the flow rate of the device. This control method offers advantages such as fast response, high accuracy, simple structure, and reliable operation. The production or blowdown pressure of the oil well where the device is installed can be adjusted without opening or closing the production valve in the wellhead. For example, this can be used to change the diameter of the flow hole 6-1 in a flowing well, adjust the production, and relieve the pressure of a heavy oil steam injection well.

[0048] Based on the above embodiment 1, the present invention also has the following embodiments:

[0049] A preferred embodiment: the inner cavity of the valve cover 2 is a non-equal diameter inner cavity and the lower inner cavity is larger than the upper inner cavity and a partition with a center hole is provided between the upper inner cavity and the middle inner cavity, wherein: a power-assisting bearing 7, a sleeve 8 and a pressure cover 9 are installed in the upper inner cavity above the partition, the power-assisting bearing 7 is installed on both sides of the lower body of the sleeve 8, the pressure cover 9 is installed on the outside of the upper body of the sleeve 8 and is threadedly connected to the upper inner cavity of the valve cover 2; the valve plate 15 is fixedly connected to the valve stem 10 below the partition, and the valve stem 10 is connected to the internal thread of the center hole of the sleeve 8 and passes through the pressure cover 9 and the manual operating component 3.

[0050] In a preferred embodiment, the throttle orifice plate 6 is made of stainless steel, and the flow holes 6-1 therein are arranged longitudinally from bottom to top and from small to large. The inner diameter of the flow holes 6-1 in the throttle orifice plate 6 can be 1 mm, 2 mm, 3 mm, 4 mm, etc. from bottom to top. The lower end of the valve plate 15 is arcuate or linear, and the outer end surface of the interface 13 is provided with a groove and can be connected to a connecting hoop, which facilitates the connection of the device with the production valve and process pipeline or blowdown line in the wellhead process. When using a valve plate 15 with a linear lower end, a valve plate settling chamber 1-2 is provided at the bottom of the valve body 1, and the valve plate settling chamber 1-2 corresponds to the valve plate moving groove 1-1. This facilitates the use of the device with a linear valve plate 15 to adjust the flow to the minimum and close the wellhead process.

[0051] A preferred embodiment: the manual operating component 3 is a handwheel or a handle, and a screw indicator shield 4 with a valve stem movement distance scale is fixed on the upper end surface of the sleeve 8, and the screw indicator shield 4 covers the valve stem 10 therein.

[0052] A preferred embodiment: the temperature and pressure probe 5 is fixed in the horizontal tube on one side of the valve body 1 through the probe gasket 17 and the probe gland 18; the external thread of the valve stem 10 and the internal thread of the shaft sleeve 8 connected to the valve stem 10 are both fine threads, which can meet the requirements of continuous and precise adjustment of the discharge flow rate; a valve body sealing ring 11 is also installed between the valve cover 2 and the valve body 1, and a gland sealing ring 12 is installed between the gland 9 and the valve cover 2 to ensure the sealing performance of the device.

[0053] The utility model can be used in a "manual" or "automatic" mode: when the automatic mode is selected, the temperature and pressure automatic controller is turned on, and the drive motor 14 can automatically adjust the flow rate according to the changes in temperature and pressure sensed by the temperature and pressure probe 5; when the manual mode is selected, the temperature and pressure automatic controller is turned off, and the operator rotates the manual operating component 3 to easily adjust the production of the self-flowing production well and the blowing flow rate of the heavy oil steam injection well.

[0054] The utility model can also be installed between the production valve and the process pipeline at the wellhead of a conventional oil production well, which can reduce the workload of employees in replacing oil nozzles and adjusting the output of the oil well.

[0055] The embodiments described above are merely typical embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and enlightenment of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the creative spirit and creative concept of the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection is not limited to the above description.

Claims

1. A flow control device capable of replacing an oil nozzle, provided with a throttle orifice plate, characterized in that: The valve body provided with a valve plate moving groove, a throttling orifice plate and an interface is connected to the valve cover. The apertures of the flow holes in the throttling orifice plate are different and are arranged longitudinally in the plate body. The throttling orifice plate is attached to and fixed on one side of the valve plate moving groove. The valve plate installed in the valve plate moving groove is fixed to the lower end of the valve stem, and the valve stem passes through the pressure cover installed in the valve cover and is threadedly connected to the manual operating component.

2. A flow control device capable of replacing a nozzle as claimed in claim 1, characterized in that: The inner cavity of the valve cover is a non-equal diameter inner cavity and the lower inner cavity is larger than the upper inner cavity and a partition with a center hole is arranged between the upper inner cavity and the middle inner cavity, wherein: a power-boosting bearing, a shaft sleeve and a pressure cover are installed in the upper inner cavity above the partition, the power-boosting bearing is installed on both sides of the lower body of the shaft sleeve, the pressure cover is installed on the outside of the upper body of the shaft sleeve and is threadedly connected to the upper inner cavity of the valve cover; the manual operating component is connected to the external thread of the upper part of the shaft sleeve above the pressure cover; the valve plate is fixedly connected to the valve stem below the partition, and the valve stem is connected to the internal thread of the center hole of the shaft sleeve and passes through the pressure cover and the manual operating component.

3. A flow control device capable of replacing a nozzle as claimed in claim 2, characterized in that: The throttling orifice plate is made of stainless steel and the flow holes therein are arranged longitudinally from bottom to top and from small to large; the external thread of the valve stem and the internal thread of the shaft sleeve connected to the valve stem are both fine threads; a valve body sealing ring is also installed between the valve cover and the valve body, and a pressure cover sealing ring is installed between the pressure cover and the valve cover.

4. A flow control device capable of replacing an oil nozzle as claimed in claim 1, 2 or 3, characterized in that: The lower end of the valve plate is arc-shaped or straight-line-shaped, and the outer end face of the interface is provided with a groove and can be connected to the connecting hoop; when a valve plate with a straight-line lower end is used, a valve plate sedimentation cavity is provided at the bottom of the valve body, and the valve plate sedimentation cavity corresponds to the valve plate movement groove.

5. A flow control device capable of replacing an oil nozzle as claimed in claim 2 or 3, characterized in that: The manual operating component is a hand wheel or a handle. A screw indicating shield provided with a valve stem moving distance scale is also fixed on the upper end surface of the shaft sleeve, and the screw indicating shield covers the valve stem.

6. A flow control device capable of replacing an oil nozzle, provided with a throttle orifice plate, characterized in that: The valve body provided with a valve plate moving groove, a throttling orifice plate and an interface is connected to the valve cover. The apertures of the flow holes in the throttling orifice plate are different and are arranged longitudinally in the plate body. The throttling orifice plate is attached to and fixed on one side of the valve plate moving groove. The valve plate installed in the valve plate moving groove is fixed to the lower end of the valve stem; the shaft sleeve and the pressure cover equipped with the power-assisting bearing are installed in the upper inner cavity of the valve cover, and the pressure cover is installed on the outside of the upper body of the shaft sleeve and is threadedly connected to the upper inner cavity of the valve cover; the driving motor and manual operation component of the temperature and pressure automatic controller are connected to the external thread on the upper part of the shaft sleeve above the pressure cover; the valve stem is connected to the internal thread of the center hole of the shaft sleeve and passes through the pressure cover, the driving motor and manual operation component of the temperature and pressure automatic controller; the temperature and pressure probe of the temperature and pressure automatic controller installed in the valve body is connected to the control module of the temperature and pressure automatic controller through a data transmission line.

7. A flow control device capable of replacing a nozzle as claimed in claim 6, characterized in that: The inner cavity of the valve cover is a non-equal diameter cavity and the lower inner cavity is larger than the upper inner cavity and a partition with a center hole is arranged between the upper inner cavity and the middle inner cavity, wherein: a power-boosting bearing, a sleeve and a pressure cover are installed in the upper inner cavity above the partition, the power-boosting bearing is installed on both sides of the lower body of the sleeve, the pressure cover is installed on the outside of the upper body of the sleeve and is threadedly connected to the upper inner cavity of the valve cover; the valve plate is fixedly connected to the valve stem below the partition, and the valve stem is connected to the internal thread of the center hole of the sleeve and passes through the pressure cover and the manual operating component.

8. A flow control device capable of replacing an oil nozzle as claimed in claim 6 or 7, characterized in that: The throttling orifice plate is made of stainless steel and the flow holes therein are arranged longitudinally from bottom to top and from small to large; the lower end of the valve plate is arc-shaped or straight-line-shaped, and the outer end face of the interface is provided with a groove and can be connected to the connecting hoop; when a valve plate with a straight-line lower end is used, a valve plate sedimentation cavity is provided at the bottom of the valve body, and the valve plate sedimentation cavity corresponds to the valve plate moving groove.

9. A flow control device capable of replacing a nozzle as claimed in claim 8, characterized in that: The manual operating component is a hand wheel or a handle. A screw indicating shield provided with a valve stem moving distance scale is fixed on the upper end surface of the shaft sleeve, and the screw indicating shield covers the valve stem.

10. A flow control device capable of replacing a nozzle as claimed in claim 9, characterized in that: The temperature and pressure probe is fixed in the horizontal tube on one side of the valve body through a probe gasket and a probe gland; the external thread of the valve stem and the internal thread of the shaft sleeve connected to the valve stem are both fine threads; a valve body sealing ring is also installed between the valve cover and the valve body, and a gland sealing ring is installed between the gland and the valve cover.

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