Driving device of intelligent flow regulator for natural gas well

Abstract

The present application relates to the field of natural gas and oil extraction technology, and discloses a driving device for a natural gas well intelligent flow regulator, including: a housing; a motor, the motor is fixed on the housing; a driving screw, the driving screw is located in the housing, and the driving screw is connected to the output shaft of the motor by transmission; a screw sleeve, the screw sleeve is arranged in the housing, the screw sleeve is threadedly matched with the driving screw, the screw sleeve and the housing can be movably matched, and the screw sleeve is constructed to move along the axial direction of the driving screw when the driving screw rotates; a first elastic energy storage member; and a second elastic energy storage member; wherein the first elastic energy storage member is constructed to apply an elastic reset force to the screw sleeve along the direction from the driving screw to the motor, and the second elastic energy storage member is constructed to apply an elastic reset force to the screw sleeve along the direction from the motor to the driving screw. The driving device for a natural gas well intelligent flow regulator provided by the embodiment of the present application can prevent the motor therein from being impacted by instantaneous large current, thereby improving the service life of the motor.

Description

Technical Field

[0001] The present application relates to the technical field of natural gas and oil exploitation, and in particular to a driving device for an intelligent flow regulator of a natural gas well. Background Art

[0002] In order to precisely control the production status of natural gas wells, more and more natural gas wells are equipped with flow regulators at their production outlets. Flow regulators mainly include valve bodies, valve seats, valve cores and drive devices. The drive device is used to drive the valve core to reciprocate between the closed position matched with the valve seat and the open position away from the valve seat.

[0003] The driving device usually uses a motor as a power source. When the valve core is in the closed position, due to the fluid pressure in the valve body acting on the valve core, a large instantaneous force needs to be applied to the valve core to make the valve core leave the closed position. Once the valve core leaves the closed position, the fluid in the valve body can flow outward, and the fluid pressure on the valve core is instantly reduced, so only a small force needs to be applied to drive the valve core to the open position. When the valve core is in the open position, the valve core is subjected to a unidirectional (from the closed position to the open position) pressure of the fluid in the valve body, and a large instantaneous force needs to be applied to the valve core to make the valve core leave the valve position. After the valve core leaves the valve position, the valve core is surrounded by the fluid in the valve body, so that the pressure on the valve core from the closed position to the open position is balanced with the pressure on the valve core from the open position to the closed position, so only a small force needs to be applied to drive the valve core to the closed position. Since a large instantaneous force is required to make the valve core leave the closed position and the open position, a large instantaneous current needs to act on the motor. Such an instantaneous large current shock can easily cause damage to the motor. Summary of the invention

[0004] An embodiment of the present application provides a driving device for a natural gas well intelligent flow regulator, which can prevent a motor therein from being impacted by instantaneous large currents, thereby increasing the service life of the motor.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0006] The driving device of a natural gas well intelligent flow regulator comprises: a housing; a motor, which is fixed on the housing; a driving screw, which is located in the housing and is drivingly connected to the output shaft of the motor; a screw sleeve, which is arranged in the housing and is threadably matched with the driving screw, and the screw sleeve is movably matched with the housing, and the screw sleeve is constructed to move along the axial direction of the driving screw when the driving screw rotates; a first elastic energy storage component; and a second elastic energy storage component; wherein the first elastic energy storage component is constructed to apply an elastic reset force to the screw sleeve along the direction from the driving screw to the motor, and the second elastic energy storage component is constructed to apply an elastic reset force to the screw sleeve along the direction from the motor to the driving screw.

[0007] Furthermore, a radially outwardly protruding abutment top portion is provided on the screw sleeve; the first elastic energy storage component is located on a side of the abutment top portion away from the motor, one end of the first elastic energy storage component is fixed and the other end abuts against the abutment top portion; the second elastic energy storage component is located on a side of the abutment top portion close to the motor, one end of the second elastic energy storage component is fixed and the other end abuts against the abutment top portion.

[0008] Furthermore, the first elastic energy storage component and the second elastic energy storage component are both springs, and the first elastic energy storage component and the second elastic energy storage component are both sleeved on the threaded sleeve.

[0009] Furthermore, a roller is provided on the screw sleeve, and the roller is in rolling cooperation with the inner surface of the shell.

[0010] Furthermore, the cross section of the shell is rectangular, and the four corners of the cross section of the shell are rounded; four rollers are arranged on the screw sleeve, and the four rollers are rollingly matched with the four corners of the cross section of the shell.

[0011] Furthermore, it also includes an inner connecting sleeve and an outer connecting sleeve; the inner connecting sleeve is arranged on the output shaft of the motor, and the outer peripheral surface of the inner connecting sleeve is provided with a plurality of connecting fins protruding radially outward; the outer connecting sleeve is connected to one end of the driving screw rod close to the motor, and the end surface of the outer connecting sleeve close to the motor is provided with a plurality of notches; the inner connecting sleeve is located inside the outer connecting sleeve, and the connecting fins are embedded in the notches.

[0012] Furthermore, a limiting portion is provided at one end of the connecting fin away from the inner connecting sleeve, and the thickness of the limiting portion is greater than the width of the notch; the limiting portion is located radially outside the outer connecting sleeve.

[0013] Furthermore, it also includes a connecting rod, a sealing shell, an elastic sealing mechanism and a sealing cover; the sealing shell is connected to the end of the shell away from the motor; one end of the connecting rod is connected to the threaded sleeve, and the connecting rod passes through the sealing shell; two elastic sealing mechanisms are relatively arranged in the sealing shell and are sleeved on the connecting rod; the sealing cover is sleeved on the connecting rod and is detachably fixed to the end of the sealing shell away from the shell; a pressure spring is also arranged between the two elastic sealing mechanisms, the pressure spring is always in a compressed state and applies axial force to the elastic sealing mechanism; the elastic sealing mechanism is constructed to expand radially under the action of the axial force.

[0014] Furthermore, the space between the two elastic sealing mechanisms is filled with silicone oil.

[0015] Furthermore, the silicone oil is in a pressurized state.

[0016] The technical solution of the present application has at least the following advantages and beneficial effects:

[0017] The driving device of the natural gas well intelligent flow regulator provided in the embodiment of the present application, the motor drives the driving screw to rotate, and the driving screw drives the screw sleeve to move along its axis. The screw sleeve is connected to the valve core of the natural gas well intelligent flow regulator, thereby driving the valve core to move directly between the open valve position and the closed valve position. When the motor drives the driving screw to rotate forward, and the screw sleeve moves to the limit along the driving screw to the motor direction (at this time, the corresponding valve core is in the open valve position), the second elastic energy storage member is compressed to the limit. At this time, the elastic force provided by the second elastic energy storage member can offset part of the fluid pressure applied to the valve core, so that at the moment when the valve core is driven to leave the valve position, the instantaneous current received by the motor is reduced. When the motor drives the driving screw to reverse, and the screw sleeve moves to the limit along the motor to the driving screw direction (at this time, the corresponding valve core is in the closed valve position), the first elastic energy storage member is compressed to the limit. At this time, the elastic force provided by the first elastic energy storage member can offset part of the fluid pressure applied to the valve core, so that at the moment when the valve core is driven to leave the closed valve position, the instantaneous current received by the motor is reduced. In this way, the motor is prevented from being impacted by instantaneous large currents, and the service life of the motor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required to be used in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic cross-sectional structure diagram of a driving device for a natural gas well intelligent flow regulator provided in this embodiment;

[0020] Figure 2 for Figure 1 AA section view;

[0021] Figure 3 A schematic diagram of the structure of the inner connecting sleeve in the driving device of the intelligent flow regulator for natural gas wells provided in this embodiment;

[0022] Figure 4 A schematic diagram of the structure of the external connection sleeve in the driving device of the intelligent flow regulator for natural gas wells provided in this embodiment;

[0023] Figure 5 A schematic diagram of the internal structure of the sealing shell in the driving device of the natural gas well intelligent flow regulator provided in this embodiment.

[0024] In the figure: 010-driving device of the intelligent flow regulator of the natural gas well; 100-housing; 200-motor; 300-driving screw; 400-screw sleeve; 410-top; 420-roller; 510-first elastic energy storage member; 520-second elastic energy storage member; 600-inner connecting sleeve; 610-connecting fin; 611-limiting part; 700-outer connecting sleeve; 710-notch; 800-sealing shell; 810-connecting rod; 820-sealing cover; 830-pressure spring; 900-elastic sealing mechanism; 901-inner cylinder; 902-rubber ring; 903-pressure ring. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them.

[0026] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0027] It should be noted that, in the absence of conflict, the embodiments in this application and the features and technical solutions in the embodiments may be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship commonly placed when the inventive product is used, or is the orientation or position relationship commonly understood by technical personnel in this field. Such terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] Embodiment 1:

[0031] Figure 1 A schematic cross-sectional structure diagram of a driving device 010 of a natural gas well intelligent flow regulator provided in this embodiment. Figure 2 for Figure 1 AA section view. Figure 3A schematic structural diagram of the inner connecting sleeve 600 in the driving device 010 of the intelligent flow regulator for natural gas wells provided in this embodiment. Figure 4 A schematic structural diagram of the outer connecting sleeve 700 in the driving device 010 of the intelligent flow regulator for a natural gas well provided in this embodiment. Figure 5 A schematic diagram of the internal structure of the sealing shell 800 in the driving device 010 of the natural gas well intelligent flow regulator provided in this embodiment.

[0032] Please refer to Figure 1-Figure 5 In this embodiment, the driving device 010 of the natural gas well intelligent flow regulator includes a housing 100 , a motor 200 , a driving screw 300 , a screw sleeve 400 , a first elastic energy storage component 510 and a second elastic energy storage component 520 .

[0033] The motor 200 is fixed on the housing 100. The drive screw 300 is located in the housing 100, and the drive screw 300 is connected to the output shaft of the motor 200. The screw sleeve 400 is arranged in the housing 100, and the screw sleeve 400 is threadedly matched with the drive screw 300, and the screw sleeve 400 and the housing 100 can be movably matched, and the screw sleeve 400 is configured to move along the axial direction of the drive screw 300 when the drive screw 300 rotates. The first elastic energy storage member 510 and the second elastic energy storage member 520 are both arranged in the housing 100. The first elastic energy storage member 510 is configured to apply an elastic reset force to the screw sleeve 400 along the direction from the drive screw 300 to the motor 200, and the second elastic energy storage member 520 is configured to apply an elastic reset force to the screw sleeve 400 along the direction from the motor 200 to the drive screw 300.

[0034] The driving device 010 of the natural gas well intelligent flow regulator provided by the present embodiment, the motor 200 drives the driving screw 300 to rotate, and the driving screw 300 drives the screw sleeve 400 to move along its axis. The screw sleeve 400 is connected with the valve core (not shown) of the natural gas well intelligent flow regulator, thereby driving the valve core to directly move in the valve opening position and the valve closing position. When the motor 200 drives the driving screw 300 to rotate forward, the screw sleeve 400 moves to the limit along the driving screw 300 to the motor 200 direction (the corresponding valve core is located in the valve opening position at this time), and the second elastic energy storage member 520 is compressed to the limit. At this time, the elastic force provided by the second elastic energy storage member 520 can offset the fluid pressure applied to the valve core, so that at the moment when the valve core is driven to leave the valve position, the instantaneous current received by the motor 200 is reduced. When the motor 200 drives the driving screw 300 to reverse, and the screw sleeve 400 moves to the limit along the direction from the motor 200 to the driving screw 300 (the corresponding valve core is in the valve closing position at this time), the first elastic energy storage member 510 is compressed to the limit. At this time, the elastic force provided by the first elastic energy storage member 510 can offset part of the fluid pressure applied to the valve core, so that at the moment when the valve core is driven out of the valve closing position, the instantaneous current received by the motor 200 is reduced. In this way, the motor 200 is prevented from being impacted by an instantaneous large current, and the service life of the motor 200 is increased.

[0035] Further, in the present embodiment, a radially outwardly protruding abutting top portion 410 is provided on the screw sleeve 400. The first elastic energy storage member 510 is located on a side of the abutting top portion 410 away from the motor 200, one end of the first elastic energy storage member 510 is fixed and the other end abuts against the abutting top portion 410. The second elastic energy storage member 520 is located on a side of the abutting top portion 410 close to the motor 200, one end of the second elastic energy storage member 520 is fixed and the other end abuts against the abutting top portion 410.

[0036] Furthermore, in the present embodiment, the first elastic energy storage component 510 and the second elastic energy storage component 520 are both springs, and the first elastic energy storage component 510 and the second elastic energy storage component 520 are both sleeved on the threaded sleeve 400 .

[0037] Furthermore, in the present embodiment, a roller 420 is disposed on the screw sleeve 400 , and the roller 420 is in rolling cooperation with the inner surface of the housing 100 .

[0038] The screw sleeve 400 rolls with the inner surface of the housing 100 through the roller 420 , thereby reducing the friction between the screw sleeve 400 and the roller 420 , and further reducing the operating current of the motor 200 .

[0039] Further, in this embodiment, the cross section of the housing 100 is rectangular, and the four corners of the cross section of the housing 100 are rounded; four rollers 420 are provided on the screw sleeve 400. The four rollers 420 are rollingly matched with the four corners of the cross section of the housing 100. In this way, the screw sleeve 400 is prevented from radially rotating while reducing the friction.

[0040] Furthermore, in this embodiment, the driving device 010 of the natural gas well intelligent flow regulator also includes an inner connecting sleeve 600 and an outer connecting sleeve 700. The inner connecting sleeve 600 is sleeved on the output shaft of the motor 200, and the outer peripheral surface of the inner connecting sleeve 600 is provided with a plurality of connecting fins 610 protruding radially outward. The outer connecting sleeve 700 is connected to one end of the driving screw 300 close to the motor 200, and the end surface of the outer connecting sleeve 700 close to the motor 200 is provided with a plurality of notches 710. The inner connecting sleeve 600 is located inside the outer connecting sleeve 700, and the connecting fins 610 are embedded in the notches 710.

[0041] The motor 200 drives the driving screw 300 to rotate through the cooperation between the inner connecting sleeve 600 and the outer connecting sleeve 700. The inner connecting sleeve 600 drives the outer connecting sleeve 700 to rotate through the connecting fin 610. During the startup of the motor 200, the connecting fin 610 will be deformed until the connecting fin 610 drives the outer connecting sleeve 700 to rotate. During this process, the working current of the motor 200 gradually increases. If the motor 200 is hard-connected to the driving screw 300, the working current of the motor 200 will instantly reach a peak value during the startup of the motor 200. Such a current impact is not conducive to the long-term normal operation of the motor 200. In this embodiment, through the flexible cooperation of the inner connecting sleeve 600 and the outer connecting sleeve 700, the working current of the motor 200 gradually increases during the startup of the motor 200, thereby avoiding the large current impact on the motor 200 and improving the service life of the motor 200.

[0042] Furthermore, in this embodiment, a stopper 611 is provided at one end of the connecting fin 610 away from the inner connecting sleeve 600, and the thickness of the stopper 611 is greater than the width of the notch 710; the stopper 611 is radially located outside the outer connecting sleeve 700. In this way, the connecting fin 610 can be prevented from being separated from the notch 710.

[0043] Further, in this embodiment, the driving device 010 of the natural gas well intelligent flow regulator also includes a sealing shell 800, a connecting rod 810, a sealing cover 820 and an elastic sealing mechanism 900. The sealing shell 800 is connected to one end of the housing 100 away from the motor 200; one end of the connecting rod 810 is connected to the screw sleeve 400, and the connecting rod 810 passes through the sealing shell 800. The other end of the connecting rod 810 is used to connect with the valve core. Two elastic sealing mechanisms 900 are relatively arranged in the sealing shell 800 and are sleeved on the connecting rod 810. The sealing cover 820 is sleeved on the connecting rod 810 and is detachably fixed to one end of the sealing shell 800 away from the housing 100. A pressure spring 830 is also arranged between the two elastic sealing mechanisms 900, and the pressure spring 830 is always in a compressed state and applies an axial force to the elastic sealing mechanism 900. The elastic sealing mechanism 900 is constructed to expand radially under the action of the axial force.

[0044] Specifically, the elastic sealing mechanism 900 includes an inner cylinder 901, a rubber ring 902 and a pressure ring 903. The inner cylinder 901 is made of polytetrafluoroethylene and can be slidably sleeved on the connecting rod 810 along the axial direction. One end of the inner cylinder 901 radially protrudes outward to form a blocking portion. The rubber ring 902 is sleeved on the inner cylinder 901. The pressure ring 903 is also sleeved on the inner cylinder 901. The rubber ring 902 is located between the pressure ring 903 and the blocking portion. The pressure rings 903 of the two elastic sealing mechanisms 900 are opposite. The pressure spring 830 acts on the pressure ring 903.

[0045] Furthermore, in the present embodiment, the space between the two elastic sealing mechanisms 900 is filled with silicone oil. The silicone oil is in a pressurized state. Specifically, during the assembly process, after installing an elastic sealing mechanism 900, silicone oil is filled into the sealing shell 800. Then the pressurized spring 830 and another elastic sealing mechanism 900 are installed. Finally, the sealing cover 820 is installed. The sealing cover 820 is threadedly matched with the sealing shell 800, and the silicone oil is pressurized during the process of tightening the sealing cover 820. The silicone oil in the sealing shell 800 is in a pressurized state, and the fluid pressure in the natural gas well intelligent flow regulator can be balanced during the working process, thereby avoiding fluid leakage in the natural gas well intelligent flow regulator.

[0046] The above description is only a partial embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A driving device for a natural gas well intelligent flow regulator, characterized in that: include: case; A motor, wherein the motor is fixed on the housing; A driving screw, the driving screw is located in the housing and is drivingly connected to an output shaft of the motor; A screw sleeve, the screw sleeve is arranged in the housing, the screw sleeve is threadably matched with the drive screw, the screw sleeve is movably matched with the housing, and the screw sleeve is configured to move along the axial direction of the drive screw when the drive screw rotates; a first elastic energy storage member; as well as a second elastic energy storage member; Wherein, the first elastic energy storage member is configured to apply an elastic restoring force to the screw sleeve along the direction from the drive screw to the motor, and the second elastic energy storage member is configured to apply an elastic restoring force to the screw sleeve along the direction from the motor to the drive screw; Also includes an inner connecting sleeve and an outer connecting sleeve; The inner connecting sleeve is sleeved on the output shaft of the motor, and the outer peripheral surface of the inner connecting sleeve is provided with a plurality of connecting fins protruding radially outward; The outer connecting sleeve is connected to one end of the driving screw rod close to the motor, and a plurality of notches are arranged on the end surface of the outer connecting sleeve close to the motor; The inner connecting sleeve is located inside the outer connecting sleeve, and the connecting fin is embedded in the notch.

2. The driving device of the natural gas well intelligent flow regulator according to claim 1 is characterized in that: The screw sleeve is provided with a radially outwardly protruding abutment top portion; The first elastic energy storage member is located at a side of the abutting top away from the motor, one end of the first elastic energy storage member is fixed and the other end abuts against the abutting top; The second elastic energy storage member is located on a side of the abutting top portion close to the motor, one end of the second elastic energy storage member is fixed and the other end abuts against the abutting top portion.

3. The driving device of the natural gas well intelligent flow regulator according to claim 2 is characterized in that: The first elastic energy storage component and the second elastic energy storage component are both springs, and the first elastic energy storage component and the second elastic energy storage component are both sleeved on the threaded sleeve.

4. The driving device of the natural gas well intelligent flow regulator according to claim 1 is characterized in that: The screw sleeve is provided with a roller, and the roller is in rolling cooperation with the inner surface of the shell.

5. The driving device of the natural gas well intelligent flow regulator according to claim 4 is characterized in that: The cross section of the shell is rectangular, and the four corners of the cross section of the shell are rounded; four rollers are arranged on the screw sleeve, and the four rollers are in rolling cooperation with the four corners of the cross section of the shell.

6. The driving device of the natural gas well intelligent flow regulator according to claim 1 is characterized in that: A limiting portion is provided at one end of the connecting fin away from the inner connecting sleeve, and the thickness of the limiting portion is greater than the width of the notch; the limiting portion is located at the outer side of the outer connecting sleeve in the radial direction.

7. The driving device of the natural gas well intelligent flow regulator according to claim 1 is characterized in that: It also includes a connecting rod, a sealing shell, an elastic sealing mechanism and a sealing cover; The sealing shell is connected to one end of the housing away from the motor; one end of the connecting rod is connected to the screw sleeve, and the connecting rod passes through the sealing shell; The two elastic sealing mechanisms are arranged oppositely in the sealing shell and sleeved on the connecting rod; the sealing cover is sleeved on the connecting rod and detachably fixed to one end of the sealing shell away from the housing; A pressure spring is also arranged between the two elastic sealing mechanisms. The pressure spring is always in a compressed state and applies an axial force to the elastic sealing mechanism. The elastic sealing mechanism is constructed to expand radially under the action of the axial force.

8. The driving device of the natural gas well intelligent flow regulator according to claim 7 is characterized in that: The space between the two elastic sealing mechanisms is filled with silicone oil.

9. The driving device of the natural gas well intelligent flow regulator according to claim 8, characterized in that: The silicone oil is in a pressurized state.

Images