CN112460301A

CN112460301A - Pressure regulating valve

Info

Publication number: CN112460301A
Application number: CN202011228760.XA
Authority: CN
Inventors: 安洪军; 王雪松; 孟晓春; 俞冬兰; 刘斌; 李影; 张宏波; 杨钊云; 王彩娟; 张清; 王肇晖
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-03-09

Abstract

The application discloses pressure regulating valve belongs to the petroleum engineering field. The pressure regulating valve comprises a valve body with a liquid inlet chamber and a liquid outlet chamber, an elastic piece, a valve clack and a valve seat. The valve clack can be abutted against the valve seat or separated from the valve seat under the driving of the elastic piece, and the relative position relation of the valve clack and the valve seat can determine the on-off state of the liquid inlet chamber and the liquid outlet chamber, so that the pressure regulating valve can be used for automatically regulating the pressure in the pipe fitting. For example, the elastic element can drive the valve clack to separate from the valve seat under the extrusion of the pressure in the pipe, and the liquid inlet chamber is communicated with the liquid outlet chamber to complete pressure relief. The design of the pressure regulating valve not only greatly reduces the operation labor amount, but also has better regulation flexibility and reliability.

Description

Pressure regulating valve

Technical Field

The disclosure relates to the field of petroleum engineering, in particular to a pressure regulating valve.

Background

Casing pressure (casing pressure for short) refers to the pressure applied to the annular space of the casing in the well, and the working fluid level can be kept at a certain height by reasonably controlling the casing pressure, so that the high and stable yield of the oil well can be ensured.

In the related art, in order to control the casing pressure, a pressure gauge for displaying the casing pressure and a valve for adjusting the casing pressure are generally provided on the casing. An operator can determine the size of the casing pressure by observing the pressure gauge and can adjust the size of the valve based on the observed size of the casing pressure. For example, when a lower casing pressure is observed, the valve is adjusted up; when a higher jacket pressure is observed, the valve is reduced.

However, the solutions of the related art not only have a large operation labor amount, but also have poor reliability and flexibility of pressure control and poor control effect.

Disclosure of Invention

The embodiment of the disclosure provides a pressure regulating valve, which can solve the problems of large labor amount, poor reliability and flexibility and poor regulating effect of pressure regulating operation in the related art.

The technical scheme is as follows:

in one aspect, a pressure regulating valve is provided, the pressure regulating valve comprising: the valve comprises a valve body, a valve clack, a valve cover with a through hole, an elastic piece, a valve rod and an adjusting piece;

the valve body comprises a liquid inlet chamber, a valve seat with a through hole and a liquid outlet chamber;

the valve clack and the elastic piece are both positioned in the liquid outlet chamber;

the first end of the valve rod is positioned in the liquid outlet chamber, and the second end of the valve rod passes through a through hole in the valve cover and is positioned outside the valve body;

the valve body is connected with the valve cover;

the valve clack is connected with the first end of the elastic piece, the second end of the elastic piece is connected with the first end of the valve rod, and the second end of the valve rod is sleeved with the adjusting piece;

the adjusting piece is used for controlling the valve rod to move along the telescopic direction of the elastic piece;

the elastic component is used for driving the valve clack supports on the disk seat or break away from the disk seat the valve clack supports when on the disk seat, the feed liquor cavity with go out the liquid cavity and do not communicate the valve clack breaks away from when the disk seat, the feed liquor cavity with it passes through to go out the liquid cavity through-hole intercommunication on the disk seat.

Optionally, the elastic member includes a spring and a spring seat;

the first end of the spring is connected with the valve clack, the second end of the spring is connected with the spring clamping seat, and the spring clamping seat is further connected with the first end of the valve rod.

Optionally, the elastic member further includes: the first spring clamping groove and the second spring clamping groove are mutually independent;

the first spring clamping groove is connected with the valve clack and surrounds the first end of the spring;

the second spring clamping groove is connected with the spring clamping seat and surrounds the second end of the spring.

Optionally, the pressure regulating valve further comprises: a pressure indicator;

the pressure indicator is positioned on one side of the adjusting piece far away from the valve rod and used for indicating a constant pressure parameter.

Optionally, the pressure indicator comprises: a pressure indicating disc and a graduated scale;

the pressure indication disc is connected with the adjusting part, the pressure indication disc and the adjusting part are provided with through holes, the graduated scale penetrates through the through holes in the pressure indication disc and the adjusting part and is connected with the second end of the valve rod, and the graduated scale is used for moving along the telescopic direction of the elastic part under the driving of the valve rod.

Optionally, the valve cover is detachably connected with the valve body.

Optionally, the valve cover is a flange with a plurality of first threaded holes, and one side of the valve body, which is connected with the valve cover, is provided with a plurality of second threaded holes corresponding to the plurality of first threaded holes one to one;

the valve cover is detachably connected with the valve body through a plurality of threads in the first threaded holes and the second threaded holes.

Optionally, the adjusting member is a hand wheel.

Optionally, the pressure regulating valve further comprises: a valve stem bearing; the second end of the valve rod is sleeved on the adjusting piece through the valve rod bearing.

Optionally, the liquid inlet chamber is used for communicating with a casing in the well, and the liquid outlet chamber is used for communicating with an oil pipeline.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least can include:

the application discloses a pressure regulating valve. The pressure regulating valve comprises a valve body with a liquid inlet chamber and a liquid outlet chamber, an elastic piece, a valve clack and a valve seat. The valve clack can be abutted against the valve seat or separated from the valve seat under the driving of the elastic piece, and the relative position relation of the valve clack and the valve seat can determine the on-off state of the liquid inlet chamber and the liquid outlet chamber, so that the pressure regulating valve can be used for automatically regulating the pressure in the pipe fitting. For example, the elastic element can drive the valve clack to separate from the valve seat under the extrusion of the pressure in the pipe, and the liquid inlet chamber is communicated with the liquid outlet chamber to complete pressure relief. The design of the pressure regulating valve not only greatly reduces the operation labor amount, but also has better regulation flexibility and reliability.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of embodiments of the disclosure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structural view of a pressure regulating valve provided in an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of another pressure regulating valve provided in the embodiments of the present disclosure;

FIG. 3 is a schematic cross-sectional view of another pressure regulating valve provided in the embodiments of the present disclosure;

FIG. 4 is a schematic cross-sectional view of another pressure regulating valve provided in the embodiments of the present disclosure;

FIG. 5 is a schematic cross-sectional view of another pressure regulating valve provided in accordance with an embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional structural view of another pressure regulating valve provided in the embodiment of the present disclosure.

The various reference numbers in the drawings are illustrated below:

10-valve body, 20-valve clack, 30-valve cover, 40-elastic piece, 50-valve rod, 60-adjusting piece, 70-valve rod bearing and 80-pressure indicating piece;

101-liquid inlet chamber, 102-valve seat and 103-liquid outlet chamber;

401-spring, 402-spring cartridge, 403-first spring card slot, 404-second spring card slot;

801-pressure indicating dial, 802-scale.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Casing run into an oil well is an essential tubular for oil production. However, due to a kick or blowout, pressure is generated in the casing, i.e., casing pressure occurs. The magnitude of the casing pressure affects to some extent the height of the liquid level (i.e., the working fluid level) in the annular space formed by the well tubing and the well casing, which in turn further affects the well production. Therefore, it can be determined that reliable casing pressure control is an effective way to ensure high and stable production of oil wells.

At present, in order to control the casing pressure, the manometer that can observe the casing pressure and the valve that can adjust the casing pressure can generally be installed in the sheathed tube outside, and operating personnel can observe the casing pressure in real time through the manometer to can press manual big or little valve of opening of manual switch based on current casing, realize the control to the casing pressure.

For example, assuming that the casing pressure is the target parameter, the yield is the best, and when the operator observes that the current casing pressure is less than the target parameter, the valve can be closed to reduce the valve, so as to increase the casing pressure; similarly, when the operator observes that the current casing pressure is greater than the target parameter, the large valve can be opened, and the casing pressure is reduced. Therefore, operators need to go to an oil extraction site at irregular time and search while operating, and the workload is large. Moreover, because there is uncertainty in adjusting the valve by the operator, if the degree of adjustment may be greater or lesser, the speed of adjustment may be faster or slower, i.e., the stability of adjustment is poor. Taking pressure relief as an example, if the valve is opened more quickly and the speed of adjustment is faster, the pressure relief speed is faster, and the pressure relief is more, at this time, the irreversible loss such as oil layer collapse in the well, sand-buried oil layer and the like is easily caused. If the valve is closed less, the pressure relief is possibly less, and at the moment, the working fluid level is easily lower, the oil in the well is less or even can not be produced, and the oil production is influenced.

In order to solve the technical problem of the existing pressure regulation, the embodiment of the disclosure provides a new pressure regulating valve, which only needs one-time pressure setting, can automatically complete the pressure regulating operation without the need of observing and regulating by operators in real time, greatly reduces the labor intensity of the operators, and has better stability of pressure control.

Furthermore, the pressure regulating valve can be adapted to all vessels or tubes which require a controlled pressure, not limited to the sleeves described in the background and above, i.e. not limited to regulating the sleeve pressure. The following embodiments of the present disclosure take the example of using the pressure regulating valve to regulate the casing pressure of a casing in a well as to explain the structure of the pressure regulating valve:

fig. 1 is a schematic cross-sectional view of a pressure regulating valve provided in an embodiment of the present disclosure. As shown in fig. 1, the pressure regulating valve may include: a valve body 10, a valve flap 20, a bonnet 30 having a through hole (not shown), an elastic member 40, a valve stem 50, and an adjusting member 60.

The valve body 10 may include an inlet chamber 101, a valve seat 102 having a through hole k0, and an outlet chamber 103. Accordingly, with reference to fig. 1, the valve body 10 may have an inlet S1 and an outlet S2, the inlet S1 may be used to communicate the inlet chamber 101 with the casing, and the outlet S2 may be used to communicate the outlet chamber 103 with the oil pipeline. The flap 20 and the resilient member 40 may both be located in the outlet chamber 103. The first end of the valve rod 50 can be positioned in the liquid outlet chamber 103, and the second end of the valve rod 50 can be positioned outside the valve body 10 through the through hole on the valve cover 30.

Referring again to fig. 1, the valve body 10 may be coupled to a bonnet 30. The flap 20 may be coupled to a first end of the resilient member 40, a second end of the resilient member 40 may be coupled to a first end of the valve stem 50, and a second end of the valve stem 50 may be sleeved with the adjustment member 60. For example, the adjuster 60 may have a threaded through-hole, and the second end of the valve stem 50 may be received in the threaded through-hole of the adjuster 60.

Wherein the adjusting member 60 can be used to control the valve rod 50 to move along the telescopic direction Y1 of the elastic member 40. In this way, the elastic element 40 can be deformed to different degrees under the driving of the valve rod 50, so as to control the pressure in the sleeve. Optionally, referring to fig. 1, the extending direction Y1 of the elastic element 40 may be perpendicular to the liquid outlet direction of the liquid outlet chamber 103, and the valve rod 50 may be driven to move up and down by rotating the adjusting element 60.

The resilient member 40 may be used to urge the flap 20 against the valve seat 102 or away from the valve seat 102. When the valve flap 20 is pressed against the valve seat 102, the inlet chamber 101 is not communicated with the outlet chamber 103, and when the valve flap 20 is separated from the valve seat 102, the inlet chamber 101 is communicated with the outlet chamber 103 through a through hole k0 on the valve seat 102.

Taking the adjustment of the casing pressure, i.e. the casing pressure as an example, the working principle of the pressure adjustment valve is explained as follows:

with reference to fig. 1 and 2, when the sleeve pressure is fixed, the valve flap 20 is generally abutted against the valve seat 102, and the sleeve pressure is kept stable. When the casing pressure increases, the oil flow in the casing flows into the inlet chamber 101 through the inlet S1 and presses the valve flap 20. Then, the valve flap 20 transmits the received pressing pressure to the elastic member 40, and the elastic member 40 is compressed. Further, the resilient member 40 will move the valve flap 20 away from the valve seat 102, i.e. the valve flap 20 and the valve seat 102 are in the relative positions shown in fig. 1. At the moment, the liquid inlet chamber 101 and the liquid outlet chamber 103 can be communicated through the through hole k0 on the valve seat 102, oil gas flow can further flow into the liquid outlet chamber 103 and flow out to an oil pipeline through the outlet S2, automatic pressure relief is completed, and the sleeve pressure is correspondingly reduced.

Still referring to fig. 1 and 2, after the pressure is released to a certain extent, i.e. the sleeve pressure is gradually reduced, the elastic element 40 can be released under the action of its own elastic force and push the valve flap 20 against the valve seat 102. I.e., snap-fit into the through hole k0, to become the relative position of the flap 20 and the valve seat 102 as shown in fig. 2. At this time, the liquid inlet chamber 101 is disconnected from the liquid outlet chamber 103, and the jacket pressure is maintained at the current pressure after drainage.

According to the working principle, the pressure regulating valve recorded in the embodiment of the disclosure can automatically complete the operations of pressure relief, constant pressure and the like, has high flexibility in pressure regulation and good reliability, and greatly reduces the labor capacity.

Alternatively, the valve flap 20 described in the embodiments of the present disclosure may also be referred to as a gate, and correspondingly, the valve seat 102 for clamping the valve flap 20 may also be referred to as a gate cavity.

In summary, the embodiments of the present disclosure provide a pressure regulating valve. The pressure regulating valve comprises a valve body with a liquid inlet chamber and a liquid outlet chamber, an elastic piece, a valve clack and a valve seat. The valve clack can be abutted against the valve seat or separated from the valve seat under the driving of the elastic piece, and the relative position relation of the valve clack and the valve seat can determine the on-off state of the liquid inlet chamber and the liquid outlet chamber, so that the pressure regulating valve can be used for automatically regulating the pressure in the pipe fitting. For example, the elastic element can drive the valve clack to separate from the valve seat under the extrusion of the pressure in the pipe, and the liquid inlet chamber is communicated with the liquid outlet chamber to complete pressure relief. The design of the pressure regulating valve not only greatly reduces the operation labor amount, but also has better regulation flexibility and reliability.

Alternatively, as can be seen in conjunction with fig. 1 and 2, the inlet S1 of the valve body 10 and the outlet S2 of the valve body 10 may be flanges including a plurality of threaded holes, the flanges being a member for interconnecting the shaft to the shaft. Correspondingly, the valve body 10 can be detachably connected with the casing and the oil pipeline through threads fixed in threaded holes of the flanges.

Of course, other connecting members may be used to detachably connect the sleeve and the valve body 10, such as directly by screws, which is not limited by the embodiments of the present disclosure.

Alternatively, the adjusting member 60 according to the embodiment of the present disclosure may be a rotatable handwheel. Of course, other structures for moving the valve stem 50, such as a retractable pull rod, are also possible. The embodiments of the present disclosure do not limit this.

Alternatively, the two ends of the elastic member 40 may be fixedly connected (e.g., welded) to the corresponding components, or may be detachably connected (e.g., hooked).

Alternatively, the pressure regulating valve may include a bonnet 30 fixedly attached (e.g., welded) to the valve body 10, or may be removably attached.

For example, referring to still another pressure regulating valve shown in fig. 3, the bonnet 30 may be a flange having a plurality of first threaded holes k01, and accordingly, a side of the valve body 10 connected to the bonnet 30 has a plurality of second threaded holes k02 in one-to-one correspondence with the plurality of first threaded holes k 01. That is, the connecting surface between the valve body 10 and the bonnet 30 may be a flange. The bonnet 30 and the valve body 10 may be detachably coupled by a plurality of threads in the first and second plurality of threaded holes k01 and k 02. That is, threads may be provided through each of the oppositely disposed first and second threaded holes k01 and k02 to complete the detachable connection of the valve body 10 to the bonnet 30.

Through setting up valve gap 30 and valve body 10 and can dismantle the connection, can reliably dismantle valve gap 30 and valve body 10 when pressure regulating valve breaks down, realize the effective detection to the inside of valve body 10. Of course, the valve cover 30 and the valve body 10 can be detachably connected through other connecting pieces. Moreover, the valve body 10 of the pressure regulating valve can be maintained and protected regularly, and the service life of the pressure regulating valve is prolonged.

With continued reference to fig. 3, the pressure regulating valve may further comprise: a valve stem bearing 70.

Wherein the second end of the valve stem 50 may be sleeved on the adjuster 60 through the valve stem bearing 70. For example, the stem bearing 70 may be of annular construction and have internal and external threads. The through-hole of the adjusting member 60 may have internal threads therein, and the valve stem 50 may have external threads therein.

Wherein, the internal thread of the valve rod bearing 70 can be sleeved on the external thread of the valve rod 50, and the external thread of the valve rod bearing 70 can be sleeved with the internal thread in the through hole of the adjusting piece 60, so as to realize the sleeving of the valve rod 50 and the adjusting piece 60.

Alternatively, the valve stem 50 may also be referred to as an adjusting screw. Accordingly, the valve stem bearing 70 may also be referred to as a screw bearing.

Optionally, in the embodiment of the present disclosure, before adjusting the pressure, the casing pressure may be preset to be a fixed value based on a constant pressure parameter. Thus, when the current casing pressure is greater than the constant pressure parameter, the elastic element 40 can further drive the valve flap 20 to separate from the valve seat 102 to complete the pressure relief. When the current sleeve pressure is smaller than the constant pressure parameter, the elastic element 40 can drive the valve flap 20 to abut against the valve seat 102 to complete the constant pressure.

To accomplish the constant pressure operation, FIG. 4 shows a schematic cross-sectional view of another pressure regulating valve. As shown in fig. 4, the pressure regulating valve according to the embodiment of the present disclosure may further include: a pressure indicator 80.

Wherein the pressure indicator 80 may be located on a side of the adjuster 60 away from the valve stem 50, the pressure indicator 80 may be used to indicate a constant pressure parameter. In this manner, an operator can determine whether the casing pressure has reached a constant pressure parameter, which is generally a known constant value, by viewing the value currently indicated by the pressure indicator 80.

Alternatively, referring to fig. 5, the pressure indicator 80 may include: a pressure indicating dial 801 and a scale 802 (which may also be referred to as a pressure scale).

Wherein, the pressure indicating disc 801 can be connected with the adjusting member 60, the pressure indicating disc 801 and the adjusting member 60 can both have through holes, and the graduated scale 802 can be connected with the second end of the valve rod 50 through the through holes on the pressure indicating disc 801 and the adjusting member 60. And in conjunction with fig. 1, the scale 802 can be used to move along the telescopic direction Y1 of the elastic member 40 under the driving of the valve rod 50.

In this way, the operator can set the cuff pressure to the constant pressure parameter through the adjusting member 60, the pressure indicating dial 801, and the scale 802. Taking the adjusting member 60 as a handwheel as an example, the setting principle is introduced as follows:

the operator can rotate the adjusting member 60 to move the valve rod 50 up and down along the extending and retracting direction Y1 of the elastic member 40, and accordingly, the scale 802 moves up and down together with the valve rod. The pressure indicated by the lines where the scale 802 is level with a face of the pressure indicating dial 801 (e.g., the upper end away from the adjustment member 60) is the current casing pressure. Therefore, the operator can adjust the scale 802 based on the constant pressure parameter to complete the constant pressure operation. The reliability of automatic pressure relief can be further ensured by presetting the pressure.

After the constant pressure parameter is set, if the casing pressure is greater than the constant pressure parameter, the oil flow in the casing pipe can extrude the valve flap 20 to the elastic part 40 to drive the valve flap 20 to be separated from the valve seat 102, and the liquid inlet chamber 101 is communicated with the liquid outlet chamber 103 to complete the pressure relief. Then, if the sleeve pressure is less than the constant pressure parameter, the elastic member 40 will start to automatically release and push the valve flap 20 against the valve seat 102. The liquid inlet chamber 101 and the liquid outlet chamber 103 are disconnected to finish constant pressure. So also can confirm that the pressure regulating valve of this disclosure embodiment record only needs once artifical level pressure can ensure to the reliable control of cover pressure, and the flexibility is higher.

Alternatively, the valve stem 50 and the scale 802 may be of an integral structure, that is, the second end of the valve stem 50 may pass through the adjusting member 60 and the pressure indicating disc 801, and the second end of the valve stem 50 may be marked with scale lines for measuring the pressure value. By being provided as one body, the structure of the pressure regulating valve can be simplified.

Alternatively, the pressure adjustment member 80 is not limited to the configuration shown in FIG. 5, and may be a push button type adjustment member, for example.

Alternatively, the pressure indicating dial 801 and the adjustment member 60 may be fixedly attached (e.g., welded) or may be removably attached (e.g., by a threaded connection).

Alternatively, the scale 802 and the valve stem 50 may be fixedly attached (e.g., welded) or may be removably attached (e.g., by threaded connection).

Alternatively, fig. 6 is a schematic cross-sectional view of another pressure regulating valve provided in the embodiments of the present disclosure. As shown in fig. 6, the elastic member 40 in the pressure regulating valve may include: a spring 401 and a spring holder 402.

Wherein, a first end of the spring 401 may be connected with the valve flap 20, a second end of the spring 401 may be connected with the spring holder 402, and the spring holder 402 may also be connected with a first end of the valve rod 50.

By further arranging the spring clamping seat 402, the spring 401 can be stably stretched, and the control stability of the spring 401 is further improved.

Of course, the first end of the spring 401 may also be provided with a spring seat, that is, the first end of the spring 401 may be connected to a spring seat first, and the spring seat is connected to the valve flap 20.

Optionally, the spring holder 402 and the spring 401 may be fixedly connected or may be detachably connected.

Alternatively, the spring retainer 402 and the valve stem 50 may be fixedly attached or detachably attached.

Optionally, with continuing reference to fig. 6, in order to avoid the spring 401 from shaking left and right during extension and retraction, the elastic member 40 may further include: a first spring catch 403 and a second spring catch 404 that are independent of each other. That is, as shown in fig. 6, the first spring catch 403 and the second spring catch 404 may be spaced apart from each other in the expansion direction Y1 of the spring 401.

The first spring catch 403 may be connected to the valve flap 20 and may surround a first end of the spring 401.

A second spring card slot 404 may be coupled to the spring card holder 402 and may surround a second end of the spring 401.

In this way, the spring 401 can only extend and retract up and down without shaking left and right under the restriction of the first spring slot 403 and the second spring slot 404, and the control stability of the spring 401 is further ensured.

Optionally, each spring slot and the corresponding structure may be fixedly connected, or may be detachably connected.

Of course, only first spring latching groove 403 or only second spring latching groove 404 may be provided. As long as the spring 401 can be prevented from rocking left and right.

According to the recording of the embodiment, the pressure regulating valve provided by the embodiment of the disclosure can not only intuitively and conveniently control the setting of the casing pressure, so that the casing pressure control work can be simpler and more accurate, the totally-closed state of the casing pressure control process can not cause oil gas leakage pollution, casing pressure control can be realized by setting once, operators do not need to frequently go to the well to adjust the casing pressure, and the labor capacity of the operators is reduced. In addition, accidents such as collapse and sand production of an oil layer caused by overhigh sleeve pressure and influence on yield or too fast pressure relief due to the fact that sleeve pressure cannot be adjusted in time are eliminated, and the reliability is higher.

In the disclosed embodiments, the terms "first," second, "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" in the embodiments of the present disclosure means two or more.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A pressure regulating valve, characterized in that the pressure regulating valve comprises: the valve comprises a valve body, a valve clack, a valve cover with a through hole, an elastic piece, a valve rod and an adjusting piece;

the valve body comprises a liquid inlet chamber, a valve seat with a through hole and a liquid outlet chamber; the valve clack and the elastic piece are both positioned in the liquid outlet chamber; the first end of the valve rod is positioned in the liquid outlet chamber, and the second end of the valve rod passes through a through hole in the valve cover and is positioned outside the valve body;

the valve body is connected with the valve cover; the valve clack is connected with the first end of the elastic piece, the second end of the elastic piece is connected with the first end of the valve rod, and the second end of the valve rod is sleeved with the adjusting piece;

the adjusting piece is used for controlling the valve rod to move along the telescopic direction of the elastic piece; the elastic component is used for driving the valve clack supports on the disk seat or break away from the disk seat the valve clack supports when on the disk seat, the feed liquor cavity with go out the liquid cavity and do not communicate the valve clack breaks away from when the disk seat, the feed liquor cavity with it passes through to go out the liquid cavity through-hole intercommunication on the disk seat.

2. The pressure-regulating valve of claim 1, wherein the resilient member comprises a spring and a spring retainer;

3. The pressure-regulating valve of claim 2, wherein said elastic member further comprises: the first spring clamping groove and the second spring clamping groove are mutually independent;

4. The pressure-regulating valve according to any one of claims 1 to 3, further comprising: a pressure indicator;

5. The pressure-regulating valve of claim 4, wherein the pressure indicator comprises: a pressure indicating disc and a graduated scale;

6. The pressure-regulating valve of any one of claims 1 to 3, wherein the bonnet is removably attached to the valve body.

7. The pressure-regulating valve according to claim 6, wherein the bonnet is a flange having a plurality of first threaded holes, and one side of the valve body, which is connected to the bonnet, has a plurality of second threaded holes corresponding to the plurality of first threaded holes one to one;

8. A pressure-regulating valve according to any one of claims 1 to 3, wherein the regulating member is a hand wheel.

9. The pressure-regulating valve according to any one of claims 1 to 3, further comprising: a valve stem bearing; the second end of the valve rod is sleeved on the adjusting piece through the valve rod bearing.

10. A pressure regulating valve as claimed in any one of claims 1 to 3, wherein the inlet chamber is adapted to communicate with a well casing and the outlet chamber is adapted to communicate with a pipeline.