CN213684073U - Bottom hole chemical adding device - Google Patents
Bottom hole chemical adding device Download PDFInfo
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- CN213684073U CN213684073U CN202021119761.6U CN202021119761U CN213684073U CN 213684073 U CN213684073 U CN 213684073U CN 202021119761 U CN202021119761 U CN 202021119761U CN 213684073 U CN213684073 U CN 213684073U
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- sucker rod
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Abstract
The utility model discloses a shaft bottom charge device, including hollow sucker rod, still include: and the bottom-hole check valve is connected to the lower end of the hollow sucker rod and can enable the medicament in the hollow sucker rod to flow into the oil pipe in a one-way mode. The utility model provides an easily cause mechanical accident in the pit, drug effect have very big hysteresis quality, to the unable wax control scheduling problem of extraction liquid in the pit shaft after the pit shaft wax precipitation.
Description
Technical Field
The utility model belongs to the technical field of oil well produced liquid wax control handles technique and specifically relates to shaft bottom charge device.
Background
At present, because of the conditions of geology and crude oil characteristics, the crude oil in each oil field contains wax, when the temperature and the pressure reach certain conditions, the wax can be crystallized out and attached to a downhole production string, and after a long time, a production pipeline can be blocked, so that the oil well cannot produce, even underground mechanical accidents are caused, and great loss is caused to the production of the oil field.
At present, chemical agents are adopted for wax removal and prevention in an oil well, and two main modes are adopted for adding chemicals, firstly, the chemicals are added through a sleeve and enter through an oil sleeve annulus and a sleeve annulus, the chemicals can fall onto the working fluid level of the oil sleeve annulus firstly, and the working fluid level is hundreds of meters or even thousands of meters away from a suction inlet of an oil well pump, so that the pesticide effect has great hysteresis, the pesticide effect is reduced, and the purpose of wax removal and prevention cannot be achieved; secondly, the additive is added at the well mouth, so that the additive can be directly added into the produced liquid, but the additive only can act on the produced liquid above the ground, and the produced liquid in the well bore cannot be wax-protected, so that the wax deposition under the well can be caused, and the production of the oil well is influenced.
After retrieval, such devices have not been applied in oilfield drug dosing devices.
Publication (bulletin) No.: CN110725668A, publication (public notice) day: 2020-01-24 relates to an oil well paraffin removal and prevention agent adding pipe column and a method. According to the invention, through organic arrangement of the oil pipe, the sleeve, the dosing short section, the sucker rod, the oil well pump, the sieve pipe, the receiving device and the female plug, after the wax removing and preventing agent feeding pipe column of the oil well is connected with the oil well to be cleaned and prevented from being waxed, the opening and closing of the first gate valve and the second gate valve are controlled according to the existence of sleeve gas in the oil well, the solid wax removing and preventing agent is added, the solid wax removing and preventing agent automatically enters the receiving device to be static under the action of gravity, the solid wax removing and preventing agent is slowly released so as to achieve the purpose of controlling the dosing concentration, and the waste of the wax preventing agent is effectively avoided.
Publication (bulletin) No.: CN202500535U, publication (public notice) day: 2012-10-24 the oil pumping pipe string and the rod string with the automatic paraffin removal device are applied to the automatic paraffin removal for oil extraction in oil fields. Comprises a downhole pipe column and a downhole sucker rod string. The structure of the underground pipe column is as follows: the upper end of the guide cone is sequentially connected with a sieve tube, a tail tube, an oil pump cylinder, a lower thickened oil tube, a lower commutator short section of the automatic paraffin removal device, a middle thickened oil tube, an upper commutator short section of the automatic paraffin removal device and an upper thickened oil tube. The structure of the underground sucker rod string is as follows: the plunger of the oil pump is plugged in the pump barrel of the oil pump, the upper end of the plunger of the oil pump is sequentially connected with a lower sucker rod, a middle sucker rod, an automatic paraffin removal device importer and an upper sucker rod, and the upper sucker rod extends to a well head. The effect is as follows: the method is applied to oil well paraffin removal, does not need a hot washing and dosing mode, and saves the paraffin removal cost by more than 3 ten thousand yuan per one well year.
Publication (bulletin) No.: CN103573216A, publication (public notice) day: 2014-02-12 relates to a mechanical wellhead automatic reagent feeding device of sucker-rod pump oil well, which is characterized in that: comprises a medicine storage tank (1) and a medicine feeding pump (5), wherein the medicine storage tank (1) is connected with the medicine feeding pump (5) through a hose (11); wherein, the medicine storage tank (1) comprises a tank body, a liquid guide pipe (4) connected with a hose (11) is arranged in the tank body, and a liquid discharge tap (13) is arranged at the lower part of the tank body; the dosing pump (5) comprises a barrel, a plunger (6) is arranged in the barrel, a spring (9) is arranged below the plunger (6), a plunger handle (10) is arranged above the plunger (6), a hose (11) is communicated with the barrel through a first check valve (7) which only feeds liquid but does not discharge liquid in the dosing pump (5), and a second check valve (8) which only discharges liquid but does not discharge liquid is communicated below the barrel. The dosing pump realizes liquid suction and liquid discharge through the up-and-down movement of the plunger, and meets the flexible application of an oil field site.
Publication (bulletin) No.: CN107387024A, publication (public notice) day: 2017-11-24 provide a hollow sucker rod shaft dosing device and a shaft dosing method, which comprise a ground conveying system and a downhole sucker rod column, wherein the downhole sucker rod column is arranged in a downhole sucker rod, the downhole sucker rod column comprises a hollow sucker rod, a solid sucker rod, an oil pump plunger, a sieve tube and a plug which are sequentially connected from top to bottom, a liquid outlet is formed between the hollow sucker rod and the solid sucker rod, the oil pump plunger is arranged in an oil pump cylinder, the sieve tube is connected with the lower end of the oil pump cylinder, and the downhole sucker rod column is communicated with the ground conveying system through the upper end of the hollow sucker rod. The invention adds the agent into the oil pipe through the hollow sucker rod, solves the problem that the annular injection of the agent oil sleeve of the high gas oil well is difficult, thereby removing the wax and dirt of the crude oil on the inner wall of the oil pipe and the outer wall of the sucker rod, enlarging the oil flow passage of the crude oil, improving the trafficability of the crude oil in the oil pipe and improving the production efficiency and the benefit of the oil well.
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 provide a shaft bottom charge device to the above-mentioned defect that prior art exists, solve and provide among the above-mentioned background art, easily cause mechanical accident in the pit after the pit shaft wax precipitation, drug effect have very big hysteresis quality, to the unable wax control scheduling problem of extraction liquid in the pit shaft.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the bottom hole charge device includes hollow sucker rod, still includes:
and the bottom-hole check valve is connected to the lower end of the hollow sucker rod and can enable the medicament in the hollow sucker rod to flow into the oil pipe in a one-way mode.
Further, the downhole check valve comprises:
the middle part of the valve body is provided with a radially through medicine outlet;
the outer wall of the sealing ball seat is fixed on the inner wall of the valve body, the fixed position of the sealing ball seat is higher than the position of the medicine outlet, and a conical opening is formed in the center of the sealing ball seat;
the valve ball is positioned below the sealing ball seat, the diameter of the valve ball is larger than the minimum inner diameter of the conical opening, and meanwhile, the diameter of the valve ball is smaller than the inner diameter of the valve body;
the upper end of the jacking spring is connected with the valve ball, the lower end of the jacking spring is fixed on the inner wall of the valve body, and the jacking spring blocks the valve ball at the conical opening through self elasticity.
Furthermore, an upper port of the valve body is connected with an upper joint, and the upper end of the upper joint is connected with a lower port of the hollow sucker rod.
Furthermore, the lower port of the valve body is connected with a lower joint, and the lower end of the lower joint is connected with a plunger of the oil well pump.
Furthermore, the device also comprises a speed-adjustable dosing pump which is connected with a dosing inlet formed in the hollow sucker rod through a pipeline.
Further, still include mix the cartridge case, mix the cartridge case and pass through adjustable speed dosing pump of pipe connection.
Compared with the prior art, the utility model following beneficial effect has:
the upper joint of the check valve is connected with the hollow sucker rod, and the lower joint is connected with the upper part of the oil well pump. When certain pressure is reached, the liquid medicine jacks up the check valve sealing ball, flows out from the outlet and is mixed with the produced oil, and the agent immediately acts on the produced oil to prevent wax from forming, so that the normal production of the oil well is ensured. If the pressure at the bottom of the well is higher than the pressure in the hollow sucker rod, the sealing ball is supported by the spring in the underground check valve and sealed on the ball seat to prevent well liquid from entering the hollow sucker rod, so that the hollow rod is protected from smoothly feeding chemicals. Meanwhile, different medicaments can be added according to the specific conditions of the oil well, so that the problems of thick oil, scaling and the like of the oil well are solved.
Drawings
FIG. 1 is a schematic structural view of the downhole chemical feeding device of the present invention;
FIG. 2 is an enlarged cross-sectional view of a downhole check valve of the downhole dosing device.
In the figure: the device comprises a mixing cartridge 1, a speed-adjustable dosing pump 2, a hollow sucker rod 3, an oil pipe 4, wax 5 separated out at the bottom of a well, a bottom check valve 6, an oil well pump 7, a sealing ball 8, a sealing ball seat 9, a jacking spring 10, a medicine outlet 11, an upper joint 12 and a lower joint 13.
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:
the bottom hole medicine adding device comprises a hollow sucker rod 3 and also comprises:
and the bottom-hole check valve 6 is connected to the lower end of the hollow sucker rod and can enable the medicament in the hollow sucker rod to flow into the oil pipe 4 in a one-way mode.
Further, the downhole check valve comprises:
the middle part of the valve body is provided with a radially through medicine outlet 11;
the outer wall of the sealing ball seat is fixed on the inner wall of the valve body, the fixed position of the sealing ball seat is higher than the position of the medicine outlet, and a conical opening is formed in the center of the sealing ball seat;
the valve ball is a sealing ball 8 and is positioned below the sealing ball seat, the diameter of the valve ball is larger than the minimum inner diameter of the conical opening, and meanwhile, the diameter of the valve ball is smaller than the inner diameter of the valve body;
and the upper end of the jacking spring is connected with the valve ball, the lower end of the jacking spring is fixed on the inner wall of the valve body, and the jacking spring blocks the valve ball at the conical opening through the elasticity of the jacking spring.
Further, the upper port of the valve body is connected with an upper joint 12, and the upper end of the upper joint is connected with the lower port of the hollow sucker rod.
Further, a lower port of the valve body is connected with a lower joint 13, and the lower end of the lower joint is connected with a plunger of the oil well pump 7.
Further, the device also comprises a speed-adjustable dosing pump 2, wherein the speed-adjustable dosing pump is connected with a dosing inlet formed in the hollow sucker rod through a pipeline.
Further, still include mix cartridge 1, mix the cartridge and pass through adjustable speed dosing pump of pipe connection.
The bottom medicine adding device comprises three parts, namely a medicine mixing cylinder 1 and a speed-adjustable medicine adding pump 2 on the ground part; the middle part is provided with a hollow sucker rod 3; the downhole part consists of a check valve 6, the upper joint 12 of the check valve is connected with the sucker rod, and the lower joint 13 is connected with the upper part of the oil well pump.
The specific use is as follows: the preparation method comprises the steps of pouring a medicament into the mixing cartridge 1 to achieve the required ratio, driving the medicament into the hollow rod 3 through a high-pressure pipeline through the adjustable-speed pump 2 according to the required flow, driving the medicament into the check valve 6 on the underground oil well pump 7 through the hollow sucker rod 3, ejecting the check valve sealing ball 8 in the figure 2 when certain pressure is reached, enabling the medicament to flow out of the outlet 11 and be mixed with extracted oil, enabling the medicament to act with the extracted oil immediately, and further preventing wax 5 from being formed, so that the normal production of an oil well is guaranteed.
If the pressure at the bottom of the well is higher than the pressure in the hollow sucker rod, the spring 10 in the check valve in the figure 2 supports the sealing ball, and the sealing ball is sealed on the ball seat 9 to prevent well liquid from entering the hollow rod 3, so that the hollow rod is protected from smooth dosing. Simultaneously the device can also add different medicaments in mixing cartridge 1 according to the particular case of oil well, solves the different problems such as oil well thick, scale deposit etc..
Example 2:
referring to fig. 1 to 2, the present invention provides a technical solution:
the bottom hole medicine adding device comprises a hollow sucker rod 3 and also comprises:
and the bottom-hole check valve 6 is connected to the lower end of the hollow sucker rod and can enable the medicament in the hollow sucker rod to flow into the oil pipe 4 in a one-way mode.
Further, the downhole check valve comprises:
the middle part of the valve body is provided with a radially through medicine outlet 11;
the outer wall of the sealing ball seat is fixed on the inner wall of the valve body, the fixed position of the sealing ball seat is higher than the position of the medicine outlet, and a conical opening is formed in the center of the sealing ball seat;
the valve ball is a sealing ball 8 and is positioned below the sealing ball seat, the diameter of the valve ball is larger than the minimum inner diameter of the conical opening, and meanwhile, the diameter of the valve ball is smaller than the inner diameter of the valve body;
and the upper end of the jacking spring is connected with the valve ball, the lower end of the jacking spring is fixed on the inner wall of the valve body, and the jacking spring blocks the valve ball at the conical opening through the elasticity of the jacking spring.
Further, the upper port of the valve body is connected with an upper joint 12, and the upper end of the upper joint is connected with the lower port of the hollow sucker rod.
Further, a lower port of the valve body is connected with a lower joint 13, and the lower end of the lower joint is connected with a plunger of the oil well pump 7.
Further, the device also comprises a speed-adjustable dosing pump 2, wherein the speed-adjustable dosing pump is connected with a dosing inlet formed in the hollow sucker rod through a pipeline.
Example 3:
referring to fig. 1 to 2, the present invention provides a technical solution:
the bottom hole medicine adding device comprises a hollow sucker rod 3 and also comprises:
and the bottom-hole check valve 6 is connected to the lower end of the hollow sucker rod and can enable the medicament in the hollow sucker rod to flow into the oil pipe 4 in a one-way mode.
Further, the downhole check valve comprises:
the middle part of the valve body is provided with a radially through medicine outlet 11;
the outer wall of the sealing ball seat is fixed on the inner wall of the valve body, the fixed position of the sealing ball seat is higher than the position of the medicine outlet, and a conical opening is formed in the center of the sealing ball seat;
the valve ball is a sealing ball 8 and is positioned below the sealing ball seat, the diameter of the valve ball is larger than the minimum inner diameter of the conical opening, and meanwhile, the diameter of the valve ball is smaller than the inner diameter of the valve body;
and the upper end of the jacking spring is connected with the valve ball, the lower end of the jacking spring is fixed on the inner wall of the valve body, and the jacking spring blocks the valve ball at the conical opening through the elasticity of the jacking spring.
Further, the upper port of the valve body is connected with an upper joint 12, and the upper end of the upper joint is connected with the lower port of the hollow sucker rod.
Further, a lower port of the valve body is connected with a lower joint 13, and the lower end of the lower joint is connected with a plunger of the oil well pump 7.
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 (1)
1. The bottom-hole dosing device comprises a hollow sucker rod and a bottom-hole check valve;
the bottom-hole check valve is connected to the lower end of the hollow sucker rod and can enable the medicament in the hollow sucker rod to flow into the oil pipe in a one-way mode;
the bottom hole check valve is characterized by comprising a valve body, a sealing ball seat, a valve ball, a jacking spring, a speed-adjustable dosing pump and a medicine mixing barrel;
the middle part of the valve body is provided with a radially through medicine outlet;
the outer wall of the sealing ball seat is fixed on the inner wall of the valve body, the fixed position of the sealing ball seat is higher than the position of the medicine outlet, and a conical opening is formed in the center of the sealing ball seat;
the valve ball is positioned below the sealing ball seat, the diameter of the valve ball is larger than the minimum inner diameter of the conical opening, and meanwhile, the diameter of the valve ball is smaller than the inner diameter of the valve body;
the upper end of the jacking spring is connected with the valve ball, the lower end of the jacking spring is fixed on the inner wall of the valve body, and the jacking spring blocks the valve ball at the conical opening through the elasticity of the jacking spring;
the upper end port of the valve body is connected with an upper joint, and the upper end of the upper joint is connected with the lower end port of the hollow sucker rod;
the lower port of the valve body is connected with a lower joint, and the lower end of the lower joint is connected with a plunger of an oil pump;
the adjustable-speed dosing pump is connected with a dosing inlet formed in the hollow sucker rod through a pipeline;
the medicine mixing barrel is connected with a speed-adjustable medicine feeding pump through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021119761.6U CN213684073U (en) | 2020-06-16 | 2020-06-16 | Bottom hole chemical adding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021119761.6U CN213684073U (en) | 2020-06-16 | 2020-06-16 | Bottom hole chemical adding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213684073U true CN213684073U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021119761.6U Active CN213684073U (en) | 2020-06-16 | 2020-06-16 | Bottom hole chemical adding device |
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|---|---|
| CN (1) | CN213684073U (en) |
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- 2020-06-16 CN CN202021119761.6U patent/CN213684073U/en active Active
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