CN211474076U - Concentric hydraulic control valve - Google Patents

Abstract

The utility model discloses a concentric liquid accuse valve, include: the shell is provided with an axial central cavity and an axial through hole, and the axial through hole and the axial central cavity are not communicated in the shell; further comprising: the sliding valve is arranged in an axial central cavity of the shell, the sliding valve is guaranteed to axially slide in the axial central cavity, namely the outer wall of the sliding valve is axially and hermetically connected with the inner wall of the axial central cavity in a sliding mode, an axial blind hole is formed in the lower end face of the sliding valve in an upward mode, a radial blind hole is further formed in the sliding valve, the blind end of the radial blind hole is communicated with the blind end of the axial blind hole, a first radial through hole is also formed in the shell, and the first radial through hole can be communicated with the radial blind hole but is not communicated with the axial through hole. The utility model realizes the uniform injection of the medicament through the device, and the outlet enters the oil pipe to be mixed with the produced liquid; because the pump suction inlet is approached, the medicament loss caused by a long flow of adding medicaments at the wellhead is avoided.

Description

Concentric hydraulic control valve

Technical Field

The utility model belongs to the technical field of the downhole device that oil field oil well was used and specifically relates to a concentric liquid accuse valve.

Background

At present, oil field development enters a later stage of ultra-high water content development, oil reservoir blocks with different geological conditions and fluid properties are put into development and production, oil is thick, wax is high in content, corrosion, scaling and the like, and toxic and harmful gases such as hydrogen sulfide, sulfur dioxide, carbon dioxide and the like are contained to different degrees, so that different chemical agents (such as viscosity reducers, paraffin removal and prevention agents, corrosion inhibitors, scale inhibitors, desulfurizing agents and the like) are required to be used for oil field development to realize viscosity reduction, paraffin removal and prevention, corrosion prevention and scale prevention, and the toxic and harmful gases are controlled to maintain normal production, thereby achieving the purposes of environmental protection and construction safety.

The main methods for adding chemicals to the oil well at present are as follows:

1. periodic direct filling of the casing: the method has the advantages that the construction is simple; the disadvantage is the uneven dosing concentration.

2. Uniformly filling a wellhead dosing pump: mainly comprises a medicine feeding pump, a frequency modulation control device and a medicine chest. The advantages are that relatively uniform filling of the medicament can be achieved; the defects are that the operation of the control device is unstable, and for an oil well with less chemical dosage, the chemical loss is large because the chemical reaches the liquid level for a long time, and particularly for an oil well with lower liquid level and higher content of hydrogen sulfide or sulfur dioxide, the reaction time of the chemical and the toxic and harmful gas is too short, the toxic and harmful gas can not be effectively removed, the function of the chemical can not be fully exerted, and the potential safety hazard is caused.

3. Even filling of touching formula charge device: mainly comprises a touch block fixed on a polish rod of the oil pumping unit, a touch type dosing pump and a medicine box. The reciprocating motion of the oil pumping unit is utilized to enable the touch block to periodically touch the piston of the dosing pump, so that the relatively uniform dosing of the medicament is realized. Advantages and disadvantages are basically the same as well-head dosing pump, and an additional advantage is that no power supply is required to provide power.

4. Uniformly filling underground tools: consists of an air-proof oil pump, a dosing well-flushing valve, a hydraulic control valve, a packer and a check valve. The chemical adding device overcomes the defects of the method, realizes the uniform injection of the chemical, and is particularly suitable for adding the chemical into the oil well with low liquid level and high content of toxic and harmful gases such as hydrogen sulfide, sulfur dioxide and the like.

Application No.: 201820519134.8, filing date: 2018-04-12 is a hydraulic control well washing valve for a water injection well, can realize forward and backward well washing of the water injection well in the petroleum industry under hydraulic control, and is particularly suitable for the water injection well of an offshore oil platform. The well washing valve comprises an upper cylinder sleeve and a lower cylinder sleeve, wherein a liquid flow hole is formed in a cylinder body of the lower cylinder sleeve, the upper cylinder sleeve is in threaded connection with the lower cylinder sleeve, the upper portion of the upper cylinder sleeve is connected with an upper connector provided with a central hole, a hydraulic control valve core is arranged in the upper cylinder sleeve and the lower cylinder sleeve, and the liquid flow hole of the hydraulic control valve core can be communicated with the liquid flow hole in the lower cylinder sleeve. The utility model discloses use with annular space packer is supporting, can realize well-flushing and unblocking function under the hydraulic control, improve well-flushing effect, guarantee the sealing performance of packer packing element, reduction in production cost. The valve has the advantages of simple manufacture, capability of being opened and closed for multiple times, long service life, low manufacturing cost and remarkable use effect.

Application No.: 201410316225.8 application date: 2014-07-04 relates to a rapid multi-directional multifunctional hydraulic control valve, which comprises a valve core, a valve body and a valve seat, wherein the valve core is arranged in a cavity inside the valve body, and the valve seat is fixed at the upper end of the valve body; the valve core is provided with a differential hole which enables the upper end and the lower end of the valve core to generate differential pressure; the valve seat is provided with a control hole, and the differential hole, the cavity at the upper part of the valve core and the control hole are communicated; when the hydraulic valve is opened, hydraulic oil in the main oil way forms an oil way through the differential hole, the cavity at the upper part of the valve core and the control hole; when the control hole is closed, the valve core moves under the action of high-pressure hydraulic oil in the cavity at the upper part of the valve core, and the hydraulic control valve is closed. The hydraulic control valve is provided with a differential hole, the reaction is rapid and sensitive, and the pressure maintaining can be realized.

Application No.: 201810542406.0, filing date: 2018-05-30 relates to a hydraulic control valve with a symmetrical structure, which comprises: the valve body is internally provided with a first cavity, a second cavity and a third cavity, and the valve body is provided with a liquid inlet, a liquid outlet and a pressure relief opening which are respectively communicated with the first cavity, the second cavity and the third cavity. Among the technical scheme that this disclosure provided, through output and the pressure release of input hydraulic control valve, it is more succinct for the solenoid valve, be difficult to break down, and simple structure, low cost.

Application No.: 200720067489.X, application date: 2007-02-26 relates to a self-priming water pump, in particular to a backflow preventing device of the self-priming pump. A piston type hydraulic control valve for a self-priming pump comprises a valve seat, a valve cover and a piston, wherein the valve cover is arranged on the upper part of the valve seat; the top of the valve cover of the pressure relief valve is provided with a water drainage through hole B, the lower part of the side wall of the valve cover is provided with a through hole A, the top of the push rod is provided with a valve plate, a spring is arranged between the valve plate and the valve cover, a sealing gasket is arranged on the valve plate, and the sealing gasket is matched with the water drainage through hole B; the middle of the bottom of the valve seat of the main valve is a convex cylinder and is provided with a through hole, the bottom D of the through hole is communicated with a suction pipe connected with a self-priming pump, the top P of the through hole is matched with the bottom of a piston, a main spring is arranged between the piston and the valve seat, and the bottom of the valve seat is provided with a ventilation through hole E; the lower part of the push rod is fixedly connected with the upper part of the piston. Simple structure, convenient use and maintenance, thereby prolonging the service life of the whole self-priming pump.

Application No.: 201821468703.7, filing date: 2018-09-07 provides a hydraulic control valve for petroleum engineering, and relates to the technical field of hydraulic control valves. The hydraulic control valve has the advantages of being convenient to install and improving fastening capacity. This hydraulic control valve for petroleum engineering, including body, installation device and detection device, the left side fixed mounting of body has installation device, and installation device's bottom fixed mounting has detection device, and installation device includes the rectangle frame, and the inside fixed mounting of rectangle frame has a pinion rack, and the one end fixed mounting that the rectangle frame was kept away from to a pinion rack has the spring beam, and the surface sliding connection of spring beam has a hydraulic pressure pipe, and the one end fixed mounting that the spring beam was kept away from to the hydraulic pressure pipe has No. two pinion racks. This hydraulic control valve for oil engineering, the installation is more simple and convenient, practices thrift installation time, improves the work efficiency of installation, simultaneously through increasing installation device for hydraulic control valve's installation fastening effect further promotes and conveniently dismantles and overhauls.

Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, perhaps technical field or application scenario are different, are directed to the utility model discloses more technical problem and the beneficial effect that will solve, above open technical document all do not have the technological inspiration.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, the device realizes the uniform injection of the medicament, and the outlet enters the oil pipe to be mixed with the produced liquid; because the pump suction inlet is approached, the medicament loss caused by a long flow of adding medicaments at the wellhead is avoided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a concentric pilot operated valve comprising:

the shell is provided with an axial central cavity and an axial through hole, and the axial through hole and the axial central cavity are not communicated in the shell;

further comprising:

the sliding valve is arranged in an axial central cavity of the shell, the sliding valve is guaranteed to axially slide in the axial central cavity, namely the outer wall of the sliding valve is axially and hermetically connected with the inner wall of the axial central cavity in a sliding mode, an axial blind hole is formed in the lower end face of the sliding valve in an upward mode, a radial blind hole is further formed in the sliding valve, the blind end of the radial blind hole is communicated with the blind end of the axial blind hole, a first radial through hole is also formed in the shell, and the first radial through hole can be communicated with the radial blind hole but is not communicated with the axial through hole.

Further, still include:

the water nozzle is of a communicated tubular structure and is connected to the lower end of the sliding valve, and the water nozzle is communicated with the lower end of the axial blind hole.

Further, still include:

and the upper end of the spring is sleeved outside the water nozzle, the upper end of the spring props against the bottom of the sliding valve, and the lower end of the spring props against a necking ring table arranged on the inner wall of the axial central cavity.

Further, still include:

the filter sleeve is sleeved outside the shell, the inner diameter of the filter sleeve is larger than the outer diameter of the shell, and the filter sleeve is provided with a longitudinal long and thin seam.

Further, still include:

and the limiting joint is arranged at the upper port of the axial central cavity and is an adjusting plug, and the upper end surface of the sliding valve is limited by the lower end surface of the limiting joint.

Further, an air-bleeding pressure-relieving annular space is formed between the outer wall of the circumference of the sliding valve close to the upper end of the sliding valve and the inner wall of the axial center cavity of the shell, the shell is further provided with a second radial through hole, the radial inner end of the second radial through hole is communicated with the air-bleeding pressure-relieving annular space, and the second radial through hole is not communicated with the axial through hole.

Further, still include:

and the lower end of the upper joint is connected with the upper end of the shell, and the lower end of the upper joint is tightly pressed on the upper end of the filtering sleeve.

Further, still include:

and the upper end of the lower joint is connected with the lower end of the shell, and the upper end of the lower joint presses the lower end of the filter sleeve.

Further, still include: the outer wall of the sliding valve is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses an oil jacket annular space medicament liquid column pressure promotes the moving valve and controls radial blind pipe and open the size and realize the relative steady of medicament flow. The device realizes the uniform injection of the medicament, and the outlet enters the oil pipe to be mixed with the produced liquid; because the pump suction inlet is approached, the medicament loss caused by a long flow of adding medicaments at the wellhead is avoided.

The utility model discloses a downhole device that oil field oil well was used with other instrument cooperations, is applicable to the oil well that needs chemistry to add the medicine exploitation, can satisfy the needs that have the liquid accuse valve add medicine tubular column oil well washing in the pit. The toxic and harmful gas of the sleeve can be controlled to enter the atmosphere by matching with the sleeve for adding medicine, thereby achieving the purposes of protecting the environment and ensuring the construction safety. The speed of the chemicals entering the annular space is automatically adjusted along with the change of the liquid level of the annular space, so that the requirements of chemical dosing construction of an oil production well can be met, and the effect of the chemical chemicals is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of a concentric hydraulic control valve according to the present invention;

3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 31 3. 3

In the figure: 1-upper joint, 2-limit joint, 3-sealing ring, 4-sealing ring, 5-shell, 6-sliding valve, 7-sealing ring, 8-axial blind hole, 9-sealing ring, 10-water nozzle, 11-spring, 12-filter sleeve, 13-axial through hole, 14-sealing ring, 15-lower joint, 16-slender slot, 17-radial blind hole, 18-radial through hole and 19-radial through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1 to 2, the present invention provides a technical solution:

a concentric pilot operated valve comprising:

the shell 5 is provided with an axial central cavity and an axial through hole 13, and the axial through hole and the axial central cavity are not communicated in the shell;

further comprising:

the sliding valve 6 is arranged in an axial central cavity of the shell, so that the sliding valve can axially slide in the axial central cavity, namely the outer wall of the sliding valve is axially and hermetically connected with the inner wall of the axial central cavity in a sliding manner, an axial blind hole 8 is formed in the lower end face of the sliding valve upwards, a radial blind hole 17 is formed in the sliding valve, the blind end of the radial blind hole is communicated with the blind end of the axial blind hole, a first radial through hole 18 is also formed in the shell, and the first radial through hole can be communicated with the radial blind hole but is not communicated with the axial through hole.

Further, still include:

the water injection well choke 10, the water injection well choke is the tubulose structure that link up, and the water injection well choke is connected at the slide valve lower extreme, and the water injection well choke communicates with axial blind hole lower extreme.

Further, still include:

and the upper end of the spring is sleeved outside the water nozzle, the upper end of the spring props against the bottom of the sliding valve, and the lower end of the spring props against a necking ring table arranged on the inner wall of the axial central cavity.

Further, still include:

and the filter sleeve 12 is sleeved outside the shell, the inner diameter of the filter sleeve is larger than the outer diameter of the shell, and the filter sleeve is provided with a longitudinal long and thin seam 16.

Further, still include:

and the limiting joint 2 is arranged at the upper port of the axial central cavity and is an adjusting plug, and the upper end surface of the sliding valve is limited by the lower end surface of the limiting joint.

Further, an air-bleeding and pressure-releasing annular space is formed between the outer wall of the circumference of the sliding valve close to the upper end of the sliding valve and the inner wall of the axial center cavity of the shell, the shell is further provided with a second radial through hole 19, the radial inner end of the second radial through hole is communicated with the air-bleeding and pressure-releasing annular space, and the second radial through hole is not communicated with the axial through hole.

Further, still include:

the lower end of the upper joint is connected with the upper end of the shell, and the lower end of the upper joint compresses the upper end of the filter sleeve.

Further, still include:

and the upper end of the lower joint is connected with the lower end of the shell, and the upper end of the lower joint presses the lower end of the filter sleeve.

Further, still include: the outer wall of the sliding valve is provided with a sealing groove, and sealing rings 7 and 9 are installed in the sealing groove.

Description of the connection: the spring 11 is arranged in a step hole in the shell 5, the external thread at the upper end of the water nozzle 10 is connected with the internal thread at the lower end of the sliding valve 17 in a threaded manner and then is inserted into the inner hole of the shell 5, the external thread at the lower end of the limiting joint 2 is connected with the external thread at the upper end of the inner hole of the shell 5, the internal thread at the lower end of the upper joint 1 is connected with the external thread at the upper end of the shell 5, and the internal thread at the upper.

Description of the partial structure: the middle part of the excircle of the sliding valve 6 is provided with a radial blind hole 17 which is communicated with an axial blind hole 8 at the lower end of the sliding valve, a step hole is adjacent to the lower part of the axial blind hole 8, and an internal thread is arranged on the step hole. The inner hole of the shell 5 is a group of stepped holes, namely an axial central cavity, the upper end part of the inner hole is provided with an internal thread, the lower end of the inner hole is provided with an oil pipe thread, the radial outer side of the inner stepped hole is adjacent to a group of axial through holes 13, and the middle upper part of the outer circle of the shell 5 is respectively provided with radial through holes 18 and 19 communicated with the inner stepped hole. The filtering sleeve 12 is sleeved outside the middle section of the shell 5, and a plurality of long and thin slits 16 are arranged on the outer circle of the filtering sleeve and communicated with the inner hole, but not communicated with the upper end and the lower end of the filtering sleeve.

The working principle is that the liquid medicine flows into the radial through hole 18 from the oil jacket space of the wellhead through the filter sleeve 12, then flows into the radial blind hole 17 and the axial blind hole 8, flows into the inner cavity of the hydraulic control valve through the water nozzle 10, is mixed with the produced liquid, then flows into the oil extraction pump along with the produced liquid after passing through the axial through hole 13; when the annular liquid medicine of oil jacket reaches a take the altitude, when the pressure differential about the slide valve 6 reached a definite value, the compression force that the slide valve 6 overcame spring 11 was descended, reduced radial blind hole 17 to the area of overflowing of radial through-hole 18 for the flow through radial blind hole 17 reduces, nevertheless because the pressure increases the medicament velocity of flow and improves, consequently can keep the medicament flow relatively stable. The concentricity of the concentric hydraulic control valve means that the axial blind hole 8, the water nozzle 10, the axial central cavity, the lower joint and the like are all concentric.

The utility model relates to a succinct, reasonable, construction convenience makes through this device dynamic adjustment medicament velocity of flow and adds medicine flow and maintain a relatively stable numerical value, has solved the ground and has added the loss scheduling problem that medicine is difficult to control, medicament long distance flow produces.

Example 2:

referring to fig. 1 to 2, the present invention provides a technical solution:

a concentric pilot operated valve comprising:

the shell 5 is provided with an axial central cavity and an axial through hole 13, and the axial through hole and the axial central cavity are not communicated in the shell;

further comprising:

the sliding valve 6 is arranged in an axial central cavity of the shell, so that the sliding valve can axially slide in the axial central cavity, namely the outer wall of the sliding valve is axially and hermetically connected with the inner wall of the axial central cavity in a sliding manner, an axial blind hole 8 is formed in the lower end face of the sliding valve upwards, a radial blind hole 17 is formed in the sliding valve, the blind end of the radial blind hole is communicated with the blind end of the axial blind hole, a first radial through hole 18 is also formed in the shell, and the first radial through hole can be communicated with the radial blind hole but is not communicated with the axial through hole.

Further, still include:

the water injection well choke 10, the water injection well choke is the tubulose structure that link up, and the water injection well choke is connected at the slide valve lower extreme, and the water injection well choke communicates with axial blind hole lower extreme.

Further, still include:

and the upper end of the spring is sleeved outside the water nozzle, the upper end of the spring props against the bottom of the sliding valve, and the lower end of the spring props against a necking ring table arranged on the inner wall of the axial central cavity.

Further, still include:

and the filter sleeve 12 is sleeved outside the shell, the inner diameter of the filter sleeve is larger than the outer diameter of the shell, and the filter sleeve is provided with a longitudinal long and thin seam 16.

Further, still include:

and the limiting joint 2 is arranged at the upper port of the axial central cavity and is an adjusting plug, and the upper end surface of the sliding valve is limited by the lower end surface of the limiting joint.

Although fig. 1 to 2 are used in all the above embodiments, it is obvious to those skilled in the art that separate drawings are not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic utility model objects can also be achieved, so all these are within the protection scope of the present invention.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A concentric pilot operated valve comprising:

the shell is provided with an axial central cavity and an axial through hole, and the axial through hole and the axial central cavity are not communicated in the shell;

it is characterized by also comprising:

the sliding valve is arranged in an axial central cavity of the shell, the sliding valve is guaranteed to axially slide in the axial central cavity, namely the outer wall of the sliding valve is axially and hermetically connected with the inner wall of the axial central cavity in a sliding mode, an axial blind hole is formed in the lower end face of the sliding valve in an upward mode, a radial blind hole is further formed in the sliding valve, the blind end of the radial blind hole is communicated with the blind end of the axial blind hole, a first radial through hole is also formed in the shell, and the first radial through hole can be communicated with the radial blind hole but is not communicated with the axial through hole.

2. A concentric pilot operated valve according to claim 1, further comprising:

the water nozzle is of a communicated tubular structure and is connected to the lower end of the sliding valve, and the water nozzle is communicated with the lower end of the axial blind hole.

3. A concentric pilot operated valve according to claim 2, further comprising:

and the upper end of the spring is sleeved outside the water nozzle, the upper end of the spring props against the bottom of the sliding valve, and the lower end of the spring props against a necking ring table arranged on the inner wall of the axial central cavity.

4. A concentric pilot operated valve according to claim 1, 2 or 3 further comprising:

the filter sleeve is sleeved outside the shell, the inner diameter of the filter sleeve is larger than the outer diameter of the shell, and the filter sleeve is provided with a longitudinal long and thin seam.

5. A concentric pilot operated valve according to claim 1, 2 or 3 further comprising:

and the limiting joint is arranged at the upper port of the axial central cavity and is an adjusting plug, and the upper end surface of the sliding valve is limited by the lower end surface of the limiting joint.

6. The concentric hydraulic control valve according to claim 1, 2 or 3, wherein an air release and pressure release annular space is formed between the outer circumferential wall of the sliding valve near the upper end of the sliding valve and the inner wall of the axial central cavity of the housing, the housing is further provided with a second radial through hole, the inner radial end of the second radial through hole is communicated with the air release and pressure release annular space, and the second radial through hole is not communicated with the axial through hole.

7. The concentric pilot operated valve of claim 4, further comprising:

and the lower end of the upper joint is connected with the upper end of the shell, and the lower end of the upper joint is tightly pressed on the upper end of the filtering sleeve.

8. The concentric pilot operated valve of claim 4, further comprising:

and the upper end of the lower joint is connected with the lower end of the shell, and the upper end of the lower joint presses the lower end of the filter sleeve.

9. A concentric pilot operated valve according to claim 1, 2 or 3 further comprising: the outer wall of the sliding valve is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

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