CN209742852U

CN209742852U - Oil well chemical adding device and oil extraction equipment

Info

Publication number: CN209742852U
Application number: CN201920078114.6U
Authority: CN
Inventors: 赵长虎; 曾路; 毕晶晶; 邹凯
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2019-12-06
Anticipated expiration: 2029-01-17

Abstract

The utility model provides an oil well charge device and oil recovery equipment. A dosing device comprises a cavity, a first pipeline, a second pipeline and a third pipeline; the top of the cavity is provided with a liquid inlet which is communicated with a storage tank for storing liquid medicine through a first pipeline, and the first pipeline is provided with a first control valve; a constant pressure port is formed in the side wall of the cavity and is communicated with a first opening of a tee joint of the Christmas tree through a second pipeline; a liquid outlet is formed in the bottom of the cavity and is communicated with a second opening of the tee joint through a third pipeline; the cavity is used for being arranged above the tee joint. An oil recovery apparatus comprising: the Christmas tree is arranged at the top end of the oil sleeve annulus, and the oil well chemical adding device is also provided. The utility model provides an oil well charge device and oil recovery equipment, after adding the liquid medicine in the cavity, can make the atmospheric pressure about the liquid medicine unanimous through second pipeline and the third pipeline with the annular space intercommunication of oil jacket to make the liquid medicine in the self-flowing oil jacket annular space under the action of gravity.

Description

Oil well chemical adding device and oil extraction equipment

Technical Field

The utility model relates to an oil well charge device and oil recovery equipment belongs to oil gas exploitation technical field.

Background

In the process of oil exploitation, oil well casing pipes generate cracks or holes due to corrosion, and the generated cracks or holes have serious influence on the production process. For example, under the action of formation pressure, cracks or holes of the casing can deform, so that the oil pipe cannot be normally put into the well; when the crack or hole of the casing is located at the position of the water layer or the sand layer, the oil well can produce a large amount of water or sand, and even can be scrapped when the oil well is serious. Therefore, in the actual production process, a certain amount of medicament needs to be added into the casing of the oil well for corrosion prevention, so that the aim of safe and efficient production is fulfilled.

In the prior art, a device for dosing an oil well comprises: a dosing pump and a transfusion pipeline. Wherein, one end of the transfusion pipeline is connected with the dosing pump, and the other end is connected with a horizontal head in the three-way head of the sleeve on the Christmas tree. When adding medicine, the casing valve installed on the horizontal head is opened, then the medicine adding pump is started, medicine liquid is filled in the medicine adding pump, and the medicine liquid enters the horizontal head along the infusion pipeline under the action of the medicine adding pump and then flows into an oil sleeve ring formed by the casing and the oil pipe.

In the medicine adding process, the medicine liquid can be pressed into the air of the oil sleeve ring only by providing a high-pressure environment by the medicine adding pump because the air of the oil sleeve ring has high pressure. Therefore, the dosing pump usually consumes a large amount of electric energy, so that the economic effect of dosing is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil well charge device and oil recovery equipment to solve the technical problem of a large amount of power consumptions of charge device among the prior art.

An oil well chemical dosing device comprising: the device comprises a cavity, a first pipeline, a second pipeline and a third pipeline;

the top of the cavity is provided with a liquid inlet which is communicated with a storage tank for storing liquid medicine through a first pipeline, and the first pipeline is provided with a first control valve;

A constant pressure port is formed in the side wall of the cavity and is communicated with a first opening of a tee joint of the Christmas tree through a second pipeline;

A liquid outlet is formed in the bottom of the cavity and is communicated with a second opening of the tee joint through a third pipeline;

The cavity is used for being arranged above the tee joint.

Further, a pressure release valve is further arranged on the cavity.

Further, a first pressure sensor is arranged on the second pipeline.

Further, a flow sensor is arranged on the third pipeline.

Further, still include the buffer tank, first pipeline is used for the intercommunication the buffer tank with the mouth of intaking night, the buffer tank still be used for with the storage tank intercommunication.

further, a second control valve is further arranged on the second pipeline.

Further, a third control valve is arranged on the third pipeline.

Further, a second pressure sensor is further arranged on the third pipeline, and the second pressure sensor is located between the third control valve and a second opening of the tee joint.

Further, the device also comprises a controller, wherein the controller is electrically connected with the first control valve so as to control the opening and closing of the first control valve.

An oil recovery apparatus comprising: the Christmas tree is arranged at the top end of the oil sleeve annulus, and the oil well chemical adding device is arranged on any one of the Christmas tree and the oil sleeve annulus.

The utility model provides an oil well chemical adding device and oil extraction equipment, which comprises a cavity, a first pipeline, a second pipeline and a third pipeline, wherein the top of the cavity is provided with a liquid inlet, the liquid inlet is communicated with a storage tank storing liquid medicine through the first pipeline, and the first pipeline is provided with a first control valve; a constant pressure port is formed in the side wall of the cavity and is communicated with one opening of a tee joint of the Christmas tree through a second pipeline; a liquid outlet is formed in the bottom of the cavity and is communicated with the other opening of the tee joint through a third pipeline; the cavity is used for being arranged above the tee joint. The utility model provides an oil well charge device and oil recovery equipment, after adding the liquid medicine in the cavity, can make the atmospheric pressure about the liquid medicine unanimous through second pipeline and the third pipeline with the annular space intercommunication of oil jacket to make the liquid medicine in the self-flowing oil jacket annular space under the action of gravity.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

Fig. 1 is a schematic structural diagram of a first oil well chemical adding device provided by the utility model;

FIG. 2 is a schematic structural view of a second oil well chemical adding device provided by the utility model;

FIG. 3 is a schematic structural view of a third oil well chemical dosing device provided by the present invention;

FIG. 4 is a schematic structural view of a fourth oil well chemical dosing device provided by the present invention;

FIG. 5 is a schematic structural view of a fifth oil well chemical dosing device provided by the present invention;

Fig. 6 is a schematic structural diagram of a sixth oil well chemical adding device provided by the utility model.

Wherein:

100 a first conduit; 101 a first control valve; 200 a second conduit;

201 second control valve; 202 a first pressure sensor; 300 a third conduit;

301 a third control valve; 302 a flow sensor; 303 a second pressure sensor;

400, a cavity; 401, a liquid inlet; 402 a constant pressure port;

A 403 liquid outlet; 404 a pressure relief vent; 405 a pressure relief valve;

406 a pressure relief conduit; 500 buffer tanks; a tee joint of 600;

601 a first opening; 6011 a first sleeve valve; 602 a second opening;

6021 second sleeve valve; 700 storage tank.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

in the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Example one

Fig. 1 is a schematic structural diagram of a first oil well chemical dosing device provided in this embodiment; fig. 2 is a schematic structural diagram of a second oil well chemical dosing device provided in this embodiment. The following describes a specific implementation of the present embodiment with reference to fig. 1 to 2.

as shown in fig. 1, the oil well chemical dosing device includes a cavity 400, a first pipe 100, a second pipe 200, and a third pipe 300;

The top of the cavity 400 is provided with a liquid inlet 401, the liquid inlet 401 is communicated with a storage tank 700 for storing liquid medicine through a first pipeline 100, and the first pipeline 100 is provided with a first control valve 101;

A constant pressure port 402 is formed in the side wall of the cavity 400, and the constant pressure port 402 is communicated with a first opening 601 of the tree tee 600 of the Christmas tree through a second pipeline 200;

A liquid outlet 403 is formed in the bottom of the cavity 400, and the liquid outlet 403 is communicated with a second opening 602 of the tee 600 of the Christmas tree through a third pipeline 300;

The chamber 400 is adapted to be disposed above the tee 600.

Specifically, the cavity 400 may be a component having any shape and structure, for example, a cylindrical shape or a square shape, and this embodiment is not particularly limited thereto as long as the function of storing the liquid medicine can be achieved. The chamber 400 may be made of any suitable material, such as polypropylene (PP), or glass. It is preferable to form the chamber 400 of polypropylene because polypropylene has a low density, is corrosion resistant, and is not brittle, thus achieving weight reduction and achieving a long service life.

The liquid inlet 401 is disposed on the cavity 400, and specifically, may be disposed at the top of the cavity 400, or may also be disposed at a position above a sidewall of the cavity 400. Preferably, the liquid inlet 401 is disposed at the top of the chamber 400, so that the gravity of the liquid medicine can be used as the power for descending. In this embodiment, the processing method of the liquid inlet 401 is not particularly limited, for example, the liquid inlet 401 may be directly formed by drilling a hole in the housing of the cavity 400, or an open communicating protrusion may be formed in the housing of the cavity 400 to serve as the liquid inlet 401.

In the present embodiment, the cross-section of the first pipe 100 may be circular, or may be elliptical. The first duct 100 may have any shape, for example, it may be a straight line, or it may be a broken line, or it may be a curved line, and the operator may design it according to the requirements of the actual operation site. In this embodiment, the material of the first pipe 100 is not specifically limited, and specifically, the first pipe may be a high-pressure-resistant rubber hose, or may also be a stainless pipe, or of course, may also be a pipe formed by connecting a rubber hose and a stainless pipe together. The first pipe 100 may be made of an integral structure by integral molding, or the first pipe 100 may be a spliced structure consisting of an elbow and a plurality of branches when the first pipe 100 needs to be turned. For example, in one example, the first pipe 100 includes an elbow and two pieces of branch pipe that are threaded to two connection ends of the elbow to effect steering of the first pipe 100. In another example, the first pipe 100 is composed of a stainless steel pipe and a high pressure resistant rubber pipe, the direction of the first pipe 100 is changed by using a rubber hose, and since the rubber has elasticity, the rubber pipe with an inner diameter slightly smaller than the outer diameter of the stainless steel pipe can be selected to be sleeved on the port of the stainless steel pipe, and a fastener can be installed at the interface of the stainless steel pipe and the rubber pipe, for example, a steel wire is wound at the interface to realize a clamping function.

In this embodiment, the first conduit 100 may be connected to the inlet port 401 in any suitable manner known in the art. Specifically, the connection can be non-detachable, for example, the connection can be made into a single piece by an integral molding process, or can also be connected together by welding; of course, the first pipe 100 and the liquid inlet 401 can be detachably connected. In one example, the outer wall of the communicating protrusion on the outer shell of the cavity 400 is provided with an external thread, the inner wall of one end of the first pipeline 100 is provided with an internal thread matched with the external thread on the communicating protrusion, the communicating protrusion and the first pipeline 100 are fixed together through threaded connection, and of course, a fastening piece can be installed at the joint of the two to realize the clamping effect.

in the present embodiment, the connection mode between the first pipe 100 and the tank storing the chemical solution is not particularly limited. In particular, the tank may be non-removably connected to the first conduit 100, for example by gluing or welding. Of course, the storage tank and the first pipe 100 may be detachably connected, for example, by a screw connection or a flange connection. In one example, the storage tank 700 and the first pipeline 100 may be connected by a connecting member with internal threads, specifically, a liquid outlet protrusion with external threads is provided on the storage tank 700, the external wall of the end of the first pipeline 100 is also provided with external threads, and the end of the first pipeline 100 provided with external threads and the liquid outlet protrusion are respectively inserted into two ends of the connecting member and screwed together.

In this embodiment, a first control valve 101 is provided in the first pipe 100. In this embodiment, the type of the first control valve 101 is not limited, and for example, the first control valve may be a manual control valve, a pneumatic control valve, or an electric control valve. The first control valve 101 may be connected to the first pipe 100 by any suitable connection method known in the art, for example, a flange connection, a threaded connection, or a welding connection. In some examples, the first pipe 100 is flanged to the first control valve 101. Specifically, first connecting flanges are arranged at two ends of the first control valve 101, and second connecting flanges are respectively arranged at two connecting positions of the first pipeline 100 for connecting with the first control valve 101, so that the first control valve can be mounted on the first pipeline 100 through the matching connection of the first connecting flanges and the second connecting flanges. In another example, both connection ends of the first control valve 101 are provided with male threads, and both connection portions of the first pipe 100 for connecting with the first control valve 101 are provided with female threads, which are mounted together by screwing. In other examples, the first pipe 100 is a rubber hose, the two connection ends of the first control valve 101 are provided with male threads, the inner diameter of the rubber hose is slightly smaller than the outer diameter of the male threads of the first control valve 101, the two rubber hoses are respectively sleeved on the male threads of the first control valve 101 to realize the connection between the first pipe 100 and the first control valve 101, and a fastener is installed at the connection.

In this embodiment, the constant pressure port 402 is formed on the sidewall of the cavity 400, and the structure of the constant pressure port 402 is similar to that of the liquid inlet 401, and details are not repeated herein, and refer to the structure of the liquid inlet 401 specifically.

the second conduit 200 is similar to the first conduit 100 in shape, structure, etc., and will not be described in detail herein. The connection mode of the second pipe 200 and the constant pressure port 402 on the cavity 400 is similar to the connection mode of the first pipe 100 and the liquid inlet 401, and reference is made to the above description, and further description is omitted here.

The second pipe 200 and the first opening 601 of the christmas tree may be connected in any way, and specifically, may be non-detachably connected, for example, by welding, or bonding; the connection may be detachable, for example, a threaded connection, or a flanged connection.

in this embodiment, the structure of the liquid outlet 403 formed at the bottom of the cavity 400 is similar to that of the liquid inlet 401, and details are not repeated here, and refer to the structure of the night inlet 401 specifically.

The third duct 300 is similar to the first duct 100 in shape, structure, etc., and will not be described again. The connection manner of the third pipeline 300 and the liquid outlet 403 is similar to that of the first pipeline 100 and the liquid inlet 401, and reference is made to the above description, which is not repeated herein.

the connection of the third pipe 300 and the second opening 602 of the christmas tree is similar to the connection of the second pipe 200 and the first opening 601 of the christmas tree, and reference may also be made to the above description, which is not described herein again.

The oil well chemical adding device provided by the embodiment can be controlled in the following mode:

In one embodiment, the first control valve 101 is first opened, the liquid medicine in the storage tank 700 enters the cavity 400 along the first pipeline 100 and flows into the third pipeline 300, then the first control valve 101 is closed, then the first sleeve valve 6011 at the first opening 601 of the christmas tree tee 600 is opened, the gas in the air of the oil sleeve ring enters the cavity 400 along the second pipeline 200, then the second sleeve valve 6021 at the second opening 602 of the tee 600 is opened, and the gas in the air of the oil sleeve ring enters the third pipeline 300, so that the gas pressure at the two ends of the liquid medicine is equal to the pressure in the air of the oil sleeve ring, at this time, the pressures (gas pressures) at the two ends of the liquid medicine are mutually offset, and the liquid medicine sequentially enters the air of the oil sleeve ring through the third pipeline 300, the second opening 602, and the second sleeve valve 6021 under the action of gravity, so as to perform rust prevention and rust removal treatment on the inner wall of the sleeve.

In another embodiment, the first control valve 101 is opened first, after the liquid medicine enters the cavity 400, the first control valve 101 is closed, then the second sleeve valve 6021 is opened, the gas in the oil sleeve annulus enters the third pipeline 300, because the gas in the oil sleeve annulus has a larger pressure, the liquid in the cavity 400 slowly flows along the third pipeline 300 (or is static under the action of the gas pressure in the oil sleeve annulus), then the first sleeve valve 6011 is opened, the gas in the oil sleeve annulus enters the cavity 400 along the second pipeline 200, finally, the gas pressures at the two ends of the liquid medicine are equal to the pressure in the oil sleeve annulus, and the liquid medicine enters the oil sleeve annulus under the action of gravity.

In other embodiments, the first control valve 101 is opened first, after the liquid medicine enters the cavity 400, the first control valve 101 is closed, and then the first sleeve valve 6011 and the second sleeve valve 6021 are opened simultaneously, the air pressure at both ends of the liquid medicine is equal to the pressure in the oil jacket ring air, and the liquid medicine enters the oil jacket ring air under the action of gravity.

The oil well charge device that this embodiment provided sets up inlet, constant voltage mouth and liquid outlet respectively on the cavity, and wherein the inlet communicates with the medicine storage tank through first pipeline, and the constant voltage mouth communicates with the first opening of production tree, the liquid outlet communicates with the second opening of production tree through the third pipeline through second pipeline, constant voltage mouth. When adding medicine and accomplishing, can be through the gas pressure of second pipeline and third pipeline equilibrium upper and lower liquid level, make liquid medicine both ends receive pressure (atmospheric pressure) equal and offset each other for liquid medicine gets into the oil lantern ring aloft along third pipeline, second opening, second sleeve valve in proper order under the action of gravity, carries out rust-resistant, rust cleaning to the casing wall.

It should be noted that, in the prior art, the three-way of the christmas tree is provided with corresponding control valves.

Further, in this embodiment, a pressure relief valve 405 is further disposed on the chamber 400.

Specifically, the cavity 400 is provided with the pressure relief opening 404, and the position of the pressure relief opening 404 is not limited in this embodiment, for example, as shown in fig. 2, the pressure relief opening may be provided on a side wall of the cavity 400, or may be provided on a top portion. The structure of the pressure relief port 404 is similar to that of the liquid inlet port 401, and is not described herein. The relief valve 405 is fixed to the relief port 404 and may be non-detachably connected, for example welded together; alternatively, the connection can be detachable, for example by flange fastening.

in this embodiment, a pressure relief opening is formed in the cavity, and a pressure relief valve is installed on the pressure relief opening. When the liquid medicine is added, the pressure release valve can be opened firstly to communicate the cavity with the external environment, and if the air pressure in the cavity is higher than the atmospheric pressure, the pressure in the cavity can be released, so that the air pressure in the cavity is equal to the air pressure in the external atmosphere. Then close the relief valve, open first control valve and add the medicine to the oil jacket annular space after that, the operation step that adds the medicine in the above-mentioned embodiment of operation is the same, and the description is omitted here. Because the cavity is communicated with the external environment before dosing, the pressure in the cavity is equal to the atmospheric pressure, and after the first control valve is opened, the liquid medicine in the storage tank flows into the cavity very smoothly under the action of gravity, so that the dosing efficiency is improved.

alternatively, in this embodiment, a pressure relief pipe 406 may be installed in the pressure relief port 404, and a pressure relief valve 405 may be installed in the pressure relief pipe 406. Specifically, the pressure relief pipeline 406 is similar to the first pipeline 100, the fixing manner of the pressure relief pipeline 406 and the pressure relief port 404 is similar to the fixing manner of the first pipeline 100 and the liquid inlet 401, and the installation manner of the pressure relief valve 405 and the pressure relief pipeline 406 is similar to the installation manner of the first control valve 101 and the first pipeline 100, which is not described herein again.

The embodiment further provides the charge device who contains the pressure release pipeline, because the gas in the cavity is the aerial gas of oil lantern ring before the pressure release, various organic gases and other harmful gas promptly can cause the injury to operating personnel, consequently can excrete the place far away from operating personnel with the gas in the cavity through the pressure release pipeline, protection operating personnel's safety.

example two

FIG. 3 is a schematic structural diagram of a third oil well chemical dosing device provided in this embodiment; fig. 4 is a schematic structural diagram of a fourth oil well chemical dosing device provided in this embodiment; fig. 5 is a schematic structural diagram of a fifth oil well chemical dosing device provided in this embodiment; fig. 6 is a schematic structural diagram of a sixth oil well chemical dosing device provided in this embodiment, and the following describes an embodiment of this embodiment with reference to fig. 3 to 6.

The present embodiment is an improvement on the first embodiment, and in the present embodiment, as shown in fig. 3, a first pressure sensor 202 is disposed on the second pipeline 200. Specifically, the first pressure sensor 202 in this embodiment is not limited as long as it can test the pressure of the gas, and may be, for example, a diffused silicon pressure transmitter in the prior art, or may also be a semiconductor piezoelectric resistance type pressure sensor, or may also be a pressure gauge. The first pressure sensor 202 may be screwed to the second pipe 200 or may be flanged.

In this embodiment, a first pressure sensor is mounted on the second pipe. Before dosing, if the first pressure sensor displays that the pressure in the cavity is 0, the cavity does not need to be decompressed; and if the first pressure sensor shows that the pressure in the cavity is not 0, opening the pressure release valve until the reading of the first pressure sensor is 0, and closing the pressure release valve. Through the installation of the first pressure sensor, the pressure situation in the cavity is accurately known, unnecessary pressure relief operation is avoided, and the efficiency of medicine adding operation is improved.

Further, in the present embodiment, as shown in fig. 4, a flow sensor 302 is provided on the third pipe 300. The flow sensor 302 in this embodiment may be a strain gauge flow sensor, or may also be an inductive flow sensor, or may also be a flow meter. The flow sensor 302 may be connected to the third pipe 300 by a flange or may be connected by a screw.

In this embodiment, a flow sensor is disposed on the third pipeline, and when liquid is fed into the oil jacket ring in the air, for example, after a second casing valve on the christmas tree is opened, the amount of the liquid medicine entering the oil jacket ring in the air can be calculated, so as to provide data for subsequent work, for example, data can be provided for obtaining a relationship between the amount of the liquid medicine and a rust removal effect.

further, in the present embodiment, as shown in fig. 5, a buffer tank 500 is further included, the first pipe 100 is used for communicating the buffer tank 500 with the liquid inlet 401, and the buffer tank 500 is used for communicating with the storage tank 700. Specifically, the buffer tank 500 is disposed between the storage tank 700 and the first pipeline 100, and before the liquid medicine in the storage tank 700 enters the first pipeline 100, the liquid medicine enters the buffer tank 500 to buffer the liquid medicine, so that the liquid medicine smoothly flows into the first pipeline 100.

Further, in the present embodiment, as shown in fig. 6, a second control valve 201 is provided on the second pipe 200, and a third control valve 301 is provided on the third pipe 300. Specifically, the second control valve 201 is located between the first pressure sensor 202 and the first opening 601 of the tee 600; the third control valve 301 may be located between the outlet orifice 403 and the flow sensor 302, or may be located between the flow sensor 302 and the second opening 602 of the tee. Preferably, the second control valve 201 and the third control valve 301 are located near the chamber 400, as shown in fig. 6, for operation by an operator.

Further, in this embodiment, with continued reference to fig. 6, a second pressure sensor 303 is disposed on the third conduit 300, and the second pressure sensor 303 is located between the third control valve 301 and the second opening 602 of the tee 600 for measuring the pressure in the oil jacket air.

when dosing, the dosing device is arranged above the Christmas tree, and then the first opening and the second opening of the tee joint are opened. After the preparation work is finished, firstly, whether the reading of the first pressure sensor is 0 or not is determined, if not, the pressure relief valve is opened to relieve the pressure of the cavity until the reading of the first pressure sensor is 0, and then the pressure relief valve is closed; if the first pressure sensor indicates 0, the pressure relief operation is not needed. Then the first control valve is opened, so that the liquid medicine flows into the cavity through the buffer tank. And (3) opening the second control valve after closing the first control valve until the readings of the first pressure sensor and the second pressure sensor are equal, closing the second control valve, and then opening the third control valve, wherein the air pressures on the upper surface and the lower surface of the liquid medicine are equal and equal to the pressure in the air of the oil sleeve ring. The pressures on the upper surface and the lower surface of the liquid medicine are mutually offset, and the liquid medicine flows into the oil sleeve ring along the third pipeline under the action of gravity to remove rust of the sleeve.

Further, in this embodiment, the control device further includes a controller, and the controller is electrically connected to the first control valve 101 to control the opening and closing of the first control valve 101. Of course, the controller can also be electrically connected with the second control valve, the third control valve and the pressure relief valve to realize the overall automatic operation. The controller may be a single chip microcomputer or a switching circuit, and this embodiment is not limited as long as the function of controlling the opening and closing of the valve can be realized.

In the embodiment, remote operation can be realized by installing the controller, for example, in a central control room, an operator only needs to press a dosing button on a human-computer interaction platform to realize dosing operation; or when the on-site operation is carried out, the operation personnel can realize the dosing operation only through the human-computer interaction platform.

EXAMPLE III

The embodiment provides an oil recovery equipment, including establishing the production tree at oil jacket annular top to and the oil well charge device of any preceding embodiment. The cavity 400 in the oil well chemical dosing device is located above the tree tee 600, for example, directly above or obliquely above. A support table is provided above the christmas tree, and the cavity 400 is placed on the support table.

The oil production equipment that this embodiment provided through with the cavity setting in the top of production tree tee bend, realized that the liquid medicine flows into the oil lantern ring aloft under the effect of self gravity, the process of adding medicine need not or need hardly consume power, the consumption of the electric energy that has significantly reduced.

this oil well charge device that implements provided, including setting up relief valve, second control valve, third control valve and first pressure sensor, second pressure sensor and flow sensor. Before adding the medicine, judge whether to carry out the pressure release according to a pressure sensor's registration, when the registration is 0, directly open first control flap and add the medicine, need not to carry out the pressure release operation, avoided unnecessary pressure release operation, improved the efficiency of adding the medicine. When the readings of the first pressure sensor and the second pressure sensor are equal, the second control valve is closed, the third control valve is opened, the air pressure of the upper surface and the lower surface of the liquid medicine is consistent, the liquid medicine flows into the oil sleeve ring air under the action of gravity, the condition that the air pressure of the upper surface of the liquid medicine is consistent with the air pressure of the oil sleeve ring, but the second control valve is not closed is avoided, and the accurate control of the medicine adding process is realized.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. an oil well chemical dosing device, comprising: the device comprises a cavity, a first pipeline, a second pipeline and a third pipeline;

The top of the cavity is provided with a liquid inlet which is communicated with a storage tank for storing liquid medicine through the first pipeline, and the first pipeline is provided with a first control valve;

the cavity is used for being arranged above the tee joint.

2. The well medicating device of claim 1, wherein a pressure relief valve is further provided on the cavity.

3. A well medicating device as defined in claim 1, wherein a first pressure sensor is provided on the second conduit.

4. The well medicating device of claim 1, wherein a flow sensor is disposed on the third conduit.

5. The oil well medicating device of claim 1, further comprising a buffer tank, the first conduit for communicating the buffer tank with the liquid inlet, the buffer tank further for communicating with the storage tank.

6. A well dosing device as claimed in any one of claims 1 to 5, wherein a second control valve is provided on the second conduit.

7. a well dosing device as claimed in any one of claims 1 to 5, wherein a third control valve is provided on the third conduit.

8. A well medicating device as defined in claim 7, wherein a second pressure sensor is further provided on the third conduit between the third control valve and the second opening of the tee.

9. a well dosing device as claimed in any one of claims 1 to 5, further comprising a controller electrically connected to the first control valve to control the opening and closing of the first control valve.

10. an oil recovery apparatus, comprising: a christmas tree arranged at the top end of the oil jacket annulus, and a well medicating device according to any one of claims 1 to 9.