CN211500591U - Eccentric control valve device for oil well dosing - Google Patents

Abstract

The utility model discloses an oil well adds medicinal eccentric control valve device, include: the eccentric body is provided with an axial eccentric large hole, an axial eccentric small hole and a radial third radial hole, and the eccentric large hole is communicated with the eccentric small hole through the third radial hole; the slide valve, inside the eccentric aperture of the eccentric body was packed into to the slide valve, it can be at the inside axial slip of eccentric aperture to guarantee the slide valve, and the slide valve outer wall is axial sealed formula sliding connection with eccentric aperture inner wall promptly, first radial hole is still seted up to the eccentric body, the inside end intercommunication eccentric aperture in first radial hole diameter, first radial hole diameter outside end intercommunication eccentric body exterior space. The utility model discloses the control is added the more even inflow pump section of thick bamboo of the annular space chemical of oil jacket and is mixed with the extraction liquid. The control of the entering amount of the oil sleeve annular medicament is realized, so that the medicament effect can be fully exerted, the use amount of the medicament is reduced, the effective period of the medicament is prolonged, and the use cost of the medicament is reduced.

Description

Eccentric control valve device for oil well dosing

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 an oil well adds medicinal eccentric control valve device.

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, high in wax 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 the oil field development needs different types of chemical agents (such as viscosity reducers, paraffin removal and prevention agents, corrosion inhibitors, scale inhibitors, desulfurizing agents and the like) for 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, so that the toxic and harmful gas cannot be effectively removed, 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 discloses an above-mentioned defect to prior art existence, the more even inflow pump section of thick bamboo of chemical agent of oil jacket annular space is added in the control and the extraction liquid is mixed. The control of the entering amount of the oil sleeve annular medicament is realized, so that the medicament effect can be fully exerted, the use amount of the medicament is reduced, the effective period of the medicament is prolonged, and the use cost of the medicament is reduced.

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

an eccentric control valve assembly for use in oil well servicing, comprising:

the eccentric body is provided with an axial eccentric large hole, an axial eccentric small hole and a radial third radial hole, and the eccentric large hole is communicated with the eccentric small hole through the third radial hole;

the slide valve, inside the eccentric aperture of the eccentric body was packed into to the slide valve, it can be at the inside axial slip of eccentric aperture to guarantee the slide valve, and the slide valve outer wall is axial sealed formula sliding connection with eccentric aperture inner wall promptly, first radial hole is still seted up to the eccentric body, the inside end intercommunication eccentric aperture in first radial hole diameter, first radial hole diameter outside end intercommunication eccentric body exterior space.

Furthermore, the eccentric small hole is a stepped hole, namely the upper half section of the eccentric small hole is an expanding cavity, the lower half section of the eccentric small hole is a reducing cavity, the sliding valve is in a stepped shaft shape and is divided into an upper section, a middle section and a lower section, wherein the outer diameter of the upper section is consistent with the inner diameter of the expanding cavity, the outer diameter of the middle section is consistent with the inner diameter of the reducing cavity, the outer diameter of the lower section is smaller than the inner diameter of the reducing cavity, and an annular closed cavity is formed between the outer wall of the middle section and the inner wall of the.

Furthermore, the first radial hole and the third radial hole are positioned at the same height, and the first radial hole and the third radial hole are directly communicated with the inner part of the reducing cavity of the eccentric small hole.

Further, still include:

the lower sealing plug is plugged at the lower port of the small eccentric hole;

and the upper end of the spring props against the bottom of the sliding valve, and the lower end of the spring props against the upper end of the lower sealing plug.

Further, still include:

the upper sealing plug is arranged at the upper port of the eccentric small hole, and the upper end face of the sliding valve is limited by the lower end face of the upper sealing plug.

Furthermore, an upper compression ring cavity is formed between the outer wall of the lower half section of the circumference of the upper sealing plug and the inner wall of the small eccentric hole of the eccentric body, a second radial hole is formed in the eccentric body, the radial inner end of the second radial hole is communicated with the upper compression ring cavity, and the second radial hole is not communicated with the large eccentric hole.

Further, still include:

and the lower end of the upper joint is connected with the upper end of the eccentric body.

Further, still include:

and the upper end of the lower joint is connected with the lower end of the eccentric body.

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 device is connected in a downhole tubular column, the opening degree of the sliding valve can be adjusted through the change of the liquid level of the annular medicament, when the liquid level of the medicament is high, the space between the sliding valve and the eccentric hole is reduced, so that the inflow speed of the medicament is reduced, and when the liquid level of the medicament is low, the space between the sliding valve and the eccentric hole is increased, so that the inflow speed of the medicament is increased. Therefore, the tool can enable the medicament to uniformly flow into the pump cylinder to act with the produced liquid. Thereby achieving the purposes of improving the medicament effect, delaying the validity period and reducing the medicament cost.

The utility model relates to an instrument in pit can be along with the speed that the change automatic adjustment medicament of annular space liquid level got into the pump barrel, can satisfy the oil recovery well chemistry and add the requirement of medicine construction, improves chemical agent's effect and validity period.

Drawings

Fig. 1 is a schematic sectional structural view of the eccentric control valve device for oil well refueling according to the present invention.

In the figure: 1-upper joint, 2-sealing ring, 3-upper sealing plug, 4-radial hole, 5-sealing ring, 6-sliding valve, 7-sealed cavity, 8-sealing ring, 9-radial hole, 10-spring, 11-eccentric small hole, 12-sealing ring, 13-lower sealing plug, 14-lower joint, 15-sealing ring, 16-radial hole, 17-eccentric body, 18-eccentric large hole and 19-sealing ring.

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, the present invention provides a technical solution:

an eccentric control valve assembly for use in oil well servicing, comprising:

the eccentric body 17 is provided with an axial eccentric big hole 18, an axial eccentric small hole 11 and a radial third radial hole 16, and the eccentric big hole is communicated with the eccentric small hole through the third radial hole;

the slide valve 6, inside the eccentric aperture of the slide valve eccentric body was packed into, it can be at the inside axial slip of eccentric aperture to guarantee the slide valve, and the slide valve outer wall is axial sealed formula sliding connection with eccentric aperture inner wall promptly, first radial hole 9 is still seted up to the eccentric body, the inside end intercommunication eccentric aperture in first radial hole diameter, first radial hole diameter outside end intercommunication eccentric body exterior space.

Furthermore, the eccentric aperture is a stepped hole, namely the upper half section of the eccentric aperture is an expanding cavity, the lower half section is a reducing cavity, the sliding valve is in a stepped shaft shape and is divided into an upper section, a middle section and a lower section, wherein the outer diameter of the upper section is consistent with the inner diameter of the expanding cavity, the outer diameter of the middle section is consistent with the inner diameter of the reducing cavity, the outer diameter of the lower section is smaller than the inner diameter of the reducing cavity, and an annular sealed cavity 7 is formed between the outer wall of the middle section and the inner wall of the expanding cavity.

Furthermore, the first radial hole and the third radial hole are positioned at the same height, and the first radial hole and the third radial hole are directly communicated with the inner part of the reducing cavity of the eccentric small hole.

Further, still include:

the lower sealing plug 13 is plugged at the lower port of the eccentric small hole;

and the upper end of the spring 10 props against the bottom of the sliding valve, and the lower end of the spring props against the upper end of the lower sealing plug.

Further, still include:

and the upper sealing plug 3 is arranged at the upper port of the eccentric small hole, and the upper end face of the sliding valve is limited by the lower end face of the upper sealing plug.

Furthermore, an upper compression ring cavity is formed between the outer wall of the lower half section of the circumference of the upper sealing plug and the inner wall of the small eccentric hole of the eccentric body, the eccentric body is further provided with a second radial hole 4, the radial inner end of the second radial hole is communicated with the upper compression ring cavity, and the second radial hole is not communicated with the large eccentric hole.

Further, still include:

and the lower end of the upper joint is connected with the upper end of the eccentric body.

Further, still include:

and the upper end of the lower joint 14 is connected with the lower end of the eccentric body.

Further, still include: the outer wall of the sliding valve is provided with a sealing groove, and sealing rings 5 and 8 are installed in the sealing groove.

The lower end internal thread of the upper joint 1 is in threaded connection with the external thread at the upper end of the eccentric body 17, the upper end internal thread of the lower joint 14 is in threaded connection with the external thread at the lower end of the eccentric body 17, and the sliding valve 6, the upper sealing joint 3, the lower sealing joint 13 and the spring 10 are respectively inserted into the small eccentric hole 11. The eccentric body 17 is respectively provided with an eccentric big hole 18 and an eccentric small hole 11, a radial hole 16 is communicated between the two eccentric holes, the eccentric small hole 11 is a stepped hole with a big top and a small bottom, the sliding valve 6 is a stepped shaft with a big top and a small bottom, and the sealed cavity 7 is enclosed by the stepped inner hole of the eccentric small hole 11 and the stepped excircle of the sliding valve 6.

The utility model discloses install under the oil-well pump of pumping well tubular column, the screw thread of top connection 1 and the oil pipe threaded connection under the oil-well pump, the screw thread of lower clutch 14 and the threaded connection of packer upper portion nipple joint, the chemical agent of adding is stored in the oil jacket annulus on the packer. When more chemicals are added, the liquid level of the oil sleeve annulus is high, the generated pressure is high, the pressure is transmitted to the upper surface of the sliding valve 6 through the radial hole 4, meanwhile, the pressure is transmitted to the lower surface of the sliding valve 6 through the radial hole 9, and because the area difference exists between the upper surface and the lower surface of the sliding valve, the pressure difference is generated between the upper surface and the lower surface of the sliding valve 6, the sliding valve 6 is pushed to overcome the elasticity of the spring 10 to move downwards, the space of the eccentric small hole 11 is reduced, and the flow rate of the chemicals flowing into the pump cylinder through the eccentric small hole 11 is reduced; when the added medicament is continuously reduced, the liquid level of the medicament in the oil sleeve annulus is reduced, the generated pressure is reduced, the pressure is transmitted to the upper surface of the sliding valve 6 through the radial hole 4, meanwhile, the pressure is transmitted to the lower surface of the sliding valve 6 through the radial hole 9, the pressure difference generated by the upper surface and the lower surface is reduced due to the pressure reduction, the sliding valve 6 can continuously move upwards under the action of the elastic force of the spring, the space of the eccentric small hole 11 is enlarged, and the flow rate of the medicament flowing into the pump cylinder through the eccentric small hole 11 is increased. When the oil well pump is in an up stroke, formation fluid below the packer enters the pump cylinder, and meanwhile, chemical agents in an oil sleeve annulus above the packer flow into the radial holes 9 and the eccentric small holes 11 to be pumped into the pump cylinder to be mixed with well fluid, and the mixture is pumped out by the oil well pump.

The utility model relates to a succinct, reasonable, construction convenience realizes the control to the entering volume of oil jacket annular space medicament, consequently can full play medicament effect, reduces the use amount of medicament, makes the medicament extension validity period, reduces medicament use cost. The utility model discloses can be along with the speed that the change automatic adjustment medicament of annular space liquid level got into the pump barrel, can satisfy the oil recovery well chemistry and add the requirement of medicine construction, improve chemical agent's effect and validity period.

The utility model discloses a device in pit that oil field oil well was used is applicable to the oil well that needs chemistry to add the medicine exploitation, specifically is an instrument in pit, makes the device that gets into the oil pump that adds the annular space of oil well pit shaft controllable of chemical agent, and the cooperation sleeve pipe adds the medicine and comes the poisonous and harmful gas of control sleeve pipe and get into the atmosphere, reaches environmental protection and construction safety's purpose.

Example 2:

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

an eccentric control valve assembly for use in oil well servicing, comprising:

the eccentric body 17 is provided with an axial eccentric big hole 18, an axial eccentric small hole 11 and a radial third radial hole 16, and the eccentric big hole is communicated with the eccentric small hole through the third radial hole;

the slide valve 6, inside the eccentric aperture of the slide valve eccentric body was packed into, it can be at the inside axial slip of eccentric aperture to guarantee the slide valve, and the slide valve outer wall is axial sealed formula sliding connection with eccentric aperture inner wall promptly, first radial hole 9 is still seted up to the eccentric body, the inside end intercommunication eccentric aperture in first radial hole diameter, first radial hole diameter outside end intercommunication eccentric body exterior space.

Furthermore, the eccentric aperture is a stepped hole, namely the upper half section of the eccentric aperture is an expanding cavity, the lower half section is a reducing cavity, the sliding valve is in a stepped shaft shape and is divided into an upper section, a middle section and a lower section, wherein the outer diameter of the upper section is consistent with the inner diameter of the expanding cavity, the outer diameter of the middle section is consistent with the inner diameter of the reducing cavity, the outer diameter of the lower section is smaller than the inner diameter of the reducing cavity, and an annular sealed cavity 7 is formed between the outer wall of the middle section and the inner wall of the expanding cavity.

Furthermore, the first radial hole and the third radial hole are positioned at the same height, and the first radial hole and the third radial hole are directly communicated with the inner part of the reducing cavity of the eccentric small hole.

Further, still include:

the lower sealing plug 13 is plugged at the lower port of the eccentric small hole;

and the upper end of the spring 10 props against the bottom of the sliding valve, and the lower end of the spring props against the upper end of the lower sealing plug.

Further, still include:

and the upper sealing plug 3 is arranged at the upper port of the eccentric small hole, and the upper end face of the sliding valve is limited by the lower end face of the upper sealing plug.

Furthermore, an upper compression ring cavity is formed between the outer wall of the lower half section of the circumference of the upper sealing plug and the inner wall of the small eccentric hole of the eccentric body, the eccentric body is further provided with a second radial hole 4, the radial inner end of the second radial hole is communicated with the upper compression ring cavity, and the second radial hole is not communicated with the large eccentric hole.

Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. 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. An eccentric control valve device for oil well refueling, comprising:

the eccentric body is provided with an axial eccentric large hole, an axial eccentric small hole and a radial third radial hole, and the eccentric large hole is communicated with the eccentric small hole through the third radial hole;

the slide valve, inside the eccentric aperture of the eccentric body was packed into to the slide valve, it can be at the inside axial slip of eccentric aperture to guarantee the slide valve, and the slide valve outer wall is axial sealed formula sliding connection with eccentric aperture inner wall promptly, first radial hole is still seted up to the eccentric body, the inside end intercommunication eccentric aperture in first radial hole diameter, first radial hole diameter outside end intercommunication eccentric body exterior space.

2. The eccentric control valve device for oil well dosing according to claim 1, wherein the eccentric hole is a stepped hole, i.e. the upper half section of the eccentric hole is an expanding cavity and the lower half section is a reducing cavity, the sliding valve is a stepped shaft and is divided into an upper section, a middle section and a lower section, wherein the outer diameter of the upper section is consistent with the inner diameter of the expanding cavity, the outer diameter of the middle section is consistent with the inner diameter of the reducing cavity, the outer diameter of the lower section is smaller than the inner diameter of the reducing cavity, and an annular closed cavity is formed between the outer wall of the middle section and the inner wall of the expanding cavity.

3. The eccentric control valve assembly of claim 2, wherein the first radial bore and the third radial bore are at the same height, and wherein the first radial bore and the third radial bore are both in direct communication with the interior of the reduced diameter chamber of the eccentric orifice.

4. An eccentric control valve device for oil well filling according to claim 1, 2 or 3, characterized by further comprising:

the lower sealing plug is plugged at the lower port of the small eccentric hole;

and the upper end of the spring props against the bottom of the sliding valve, and the lower end of the spring props against the upper end of the lower sealing plug.

5. An eccentric control valve device for oil well filling according to claim 1, 2 or 3, characterized by further comprising:

the upper sealing plug is arranged at the upper port of the eccentric small hole, and the upper end face of the sliding valve is limited by the lower end face of the upper sealing plug.

6. The eccentric control valve device for oil well dosing according to claim 5, characterized in that an upper compression ring cavity is formed between the outer wall of the circumference of the lower half section of the upper sealing plug and the inner wall of the small eccentric hole of the eccentric body, the eccentric body is further provided with a second radial hole, the radial inner end of the second radial hole is communicated with the upper compression ring cavity, and the second radial hole is not communicated with the large eccentric hole.

7. The eccentric control valve device for oil well refueling according to claim 4, further comprising:

and the lower end of the upper joint is connected with the upper end of the eccentric body.

8. The eccentric control valve device for oil well refueling according to claim 4, further comprising:

and the upper end of the lower joint is connected with the lower end of the eccentric body.

9. An eccentric control valve device for oil well filling according to claim 1, 2 or 3, characterized by 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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