Movable dosing device

Abstract

The utility model relates to the technical field of oil and gas wells, in particular to a movable dosing device. The movable medicine adding device comprises a base, a first support, a conveying pipe, a nozzle, a medicine storage tank and an air source, and the first support is arranged on the base in a liftable mode. The conveying pipe is obliquely arranged on the first support, the bottom end of the conveying pipe is communicated with a nozzle, and the nozzle can be communicated with a casing side wing in a well. The medicine storage tank is communicated with the conveying pipe so as to convey medicine into the conveying pipe, and an air outlet of the air source is communicated with the top end of the conveying pipe so as to blow air into the conveying pipe. Due to the fact that the conveying pipe is obliquely arranged, the medicament enters a casing pipe in a well through the nozzle under the action of gravity, meanwhile, the gas source blows gas into the conveying pipe, the medicament enters a casing pipe annulus along with gas flow generated by the gas source, the automatic medicament adding process is achieved, the medicament adding efficiency and safety are improved, and the medicament adding cost is reduced. Meanwhile, chemicals can be quantitatively added into the chemical storage tank according to chemical adding requirements, so that the chemical adding amount and the chemical concentration in the well can be accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas wells, in particular to a mobile dosing device. Background Art

[0002] The development and utilization of oil wells and shale gas wells have made significant progress, but various chemicals need to be widely used in their later maintenance process, such as foaming agents, bactericides, corrosion inhibitors, etc. The above chemicals are usually injected into the well through the oil casing annulus (the annular space between the oil pipe and the casing in the well) in the form of liquid to maintain the concentration of the chemical in the well, so as to ensure the stable production capacity of the oil or gas well.

[0003] The traditional dosing method is to have maintenance personnel go to the site to perform regular liquid dosing operations, which increases labor costs, takes a long time to dosing, and has low dosing efficiency. At the same time, long-term use of liquid dosing methods is prone to liquid accumulation in the well, which has an adverse effect on the production capacity of the oil or gas well. In addition, the traditional manual dosing method cannot accurately control the concentration and dosage of the agent, which is not only easy to cause agent waste, but also too high or too low agent concentration will affect the production capacity of the oil or gas well.

[0004] Therefore, a mobile dosing device is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a mobile dosing device to realize automatic dosing, save costs, improve dosing efficiency, and accurately control the dosing amount and the concentration of the agent in the well.

[0006] To achieve this purpose, the technical solution adopted by the utility model is:

[0007] Mobile dosing device, including:

[0008] A base and a first bracket, wherein the first bracket is liftably disposed on the base;

[0009] A delivery pipe and a nozzle, wherein the delivery pipe is obliquely arranged on the first bracket, and the bottom end of the delivery pipe is connected with the nozzle, and the nozzle can be connected with the casing flank in the well;

[0010] The medicine storage tank is connected to the air source, and the medicine storage tank is connected to the delivery pipe to deliver medicine into the delivery pipe. The air outlet of the air source is connected to the top end of the delivery pipe to blow air into the delivery pipe.

[0011] As a preferred solution, the medicine storage tank comprises:

[0012] A tank body, wherein the top end of the tank body has an opening for the medicine to enter, and the bottom end of the tank body is connected to the delivery pipe,

[0013] The sealing cover can open or seal the opening of the can body.

[0014] As a preferred solution, the medicine storage tank further comprises a pressure relief valve, which is arranged on the tank body and can be opened when the pressure in the tank body reaches a set value.

[0015] As a preferred solution, the delivery pipe is connected to a feed pipe, the bottom end of the tank body is connected to the feed pipe, and a switch valve is provided on the feed pipe, and the switch valve is used to open or close the feed pipe.

[0016] As a preferred solution, the mobile dosing device further comprises a second bracket, the medicine storage tank is supported on the second bracket, and the second bracket is arranged at the upper end of the base or at one side of the base.

[0017] As a preferred embodiment, the nozzle comprises:

[0018] An outer tube, wherein a first end of the outer tube is connected to the bottom end of the delivery tube, and a second end of the outer tube is capable of communicating with the side wing of the casing;

[0019] The inner tube is inserted into the outer tube, and one end of the inner tube is connected to the first end of the outer tube and communicated with the bottom end of the conveying tube.

[0020] As a preferred solution, the inner diameter of the inner tube gradually decreases along the direction from the first end to the second end of the outer tube.

[0021] As a preferred embodiment, the mobile dosing device also includes a universal tube that can rotate 360 ​​degrees, the two ends of the universal tube are respectively connected to the first end of the outer tube and the bottom end of the delivery tube, and the inner tube is connected to the bottom end of the delivery tube through the universal tube.

[0022] As a preferred solution, the universal tube is a corrugated hose, and two ends of the corrugated hose are respectively connected to the first end of the outer tube and the bottom end of the delivery tube by bolts.

[0023] As a preferred solution, casters are provided at the lower end of the base.

[0024] The beneficial effects of the utility model are:

[0025] The mobile dosing device proposed in the utility model comprises a base, a first bracket, a delivery pipe, a nozzle, a medicine storage tank and an air source, and the first bracket can be lifted and lowered on the base. The delivery pipe is tiltedly arranged on the first bracket, and the bottom end of the delivery pipe is connected to a nozzle, which can be connected to the casing flank in the well. The medicine storage tank is connected to the delivery pipe to deliver the medicine into the delivery pipe, and the air outlet of the air source is connected to the top of the delivery pipe to blow air into the delivery pipe. The delivery pipe is tilted so that the medicine can enter the casing annulus in the well through the nozzle under the action of gravity, and at the same time, the air source is blown into the delivery pipe to ensure that the delivery pipe has a certain pressure resistance effect, and the medicine enters the casing annulus with the air flow generated by the air source, realizing the automatic dosing process, which is convenient and fast, without manual dosing, greatly improving the dosing efficiency and safety, and reducing the dosing cost. At the same time, the mobile dosing device can quantitatively add medicine to the medicine storage tank according to the dosing demand, so as to accurately control the dosing amount and the concentration of the medicine in the well, avoid the problem of liquid accumulation in the well, and improve the production capacity of the oil well or gas well. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a mobile dosing device provided in an embodiment of the utility model;

[0027] Figure 2 It is a front view of the mobile dosing device provided in an embodiment of the utility model.

[0028] The names and numbers of the components in the figure are as follows:

[0029] 1. Base; 2. First bracket; 3. Delivery pipe; 31. Feed pipe; 4. Nozzle; 41. Outer pipe; 42. Inner pipe; 5. Medicine storage tank; 51. Tank body; 52. Sealing cover; 53. Pressure gauge; 54. Pressure relief valve; 6. Second bracket; 7. Universal tube; 8. Casters. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0035] In the process of adding chemicals to oil wells and gas wells, the traditional method of adding chemicals is to have maintenance personnel go to the site to perform regular injection operations of liquid chemicals, which increases labor costs, and the addition process is time-consuming and inefficient. At the same time, long-term use of liquid addition methods is prone to liquid accumulation in the well, which has an adverse effect on the production capacity of oil or gas wells. Especially for low-yield and low-pressure gas wells, the added liquid will cause fluctuations in gas well production, resulting in problems such as reduced production. In addition, the traditional manual addition method cannot accurately control the concentration and dosage of the chemical, which is not only prone to waste of chemicals, but also too high or too low chemical concentrations will affect the production capacity of oil or gas wells.

[0036] To solve the above problems, Figure 1 and Figure 2As shown, the mobile dosing device includes a base 1, a first bracket 2, a delivery pipe 3, a nozzle 4, a medicine storage tank 5 and an air source, and the first bracket 2 can be lifted and lowered on the base 1. The delivery pipe 3 is tilted and arranged on the first bracket 2, and the bottom end of the delivery pipe 3 is connected with a nozzle 4, which can be connected with the casing flank in the well (oil well or gas well). The medicine storage tank 5 is connected with the delivery pipe 3 to deliver the medicine into the delivery pipe 3, and the air outlet of the air source is connected with the top of the delivery pipe 3 to blow air into the delivery pipe 3. The delivery pipe 3 is tilted so that the medicine can enter the casing annulus in the well through the nozzle 4 under the action of gravity, and at the same time, the air source is used to blow air into the delivery pipe 3, so as to ensure that the delivery pipe 3 has a certain pressure resistance effect, and the medicine is allowed to enter the casing annulus with the airflow generated by the air source, so as to realize the automatic dosing process, which is convenient and fast, and does not require manual dosing, greatly improving the dosing efficiency and safety, and reducing the dosing cost. At the same time, the mobile dosing device can add drugs to the drug storage tank 5 in a quantitative manner according to the dosing requirements to accurately control the dosage and the concentration of the drugs in the well, avoid the problem of liquid accumulation in the well, and improve the production capacity of the oil well or gas well.

[0037] like Figure 1 As shown, a caster 8 is provided at the lower end of the base 1 of the present embodiment. The caster 8 is a universal wheel with a brake, so that the base 1 can move forward and backward and make a 360° turn through the universal wheel, thereby realizing the flexible movement of the base 1, so that the mobile dosing device can move quickly between multiple oil wells or gas wells, which is beneficial to improving the dosing efficiency.

[0038] Furthermore, a plurality of lifting rings are provided on the base 1, and a lifting device such as a crane lifts the mobile dosing device to a transport vehicle through the lifting rings, so as to facilitate the mobile dosing device to perform long-distance transfer operations. A handle is also provided on the side wall of the base 1, so as to push the mobile dosing device to move.

[0039] like Figure 1 As shown, the medicine storage tank 5 includes a tank body 51 and a sealing cover 52. The top of the tank body 51 has an opening for the medicine to enter, and the bottom of the tank body 51 is connected to the delivery pipe 3. The sealing cover 52 can open or seal the opening of the tank body 51. After the medicine is added into the tank body 51, the sealing cover 52 seals and closes the opening of the tank body 51 to ensure a closed environment in the tank body 51. The tank body 51 of this embodiment is hemispherical, and the medicine storage tank 5 is used to store the medicine to be added. The type and weight of the medicine can be flexibly adjusted according to production requirements and are not specifically limited here. The bottom center of the tank body 51 is connected to the delivery pipe 3. Under the guiding effect of the spherical side wall inside the tank body 51, the medicine in the tank body 51 can gather toward the bottom center to quickly enter the delivery pipe 3, avoiding the accumulation of residual medicine in the tank body 51, which is conducive to improving the efficiency of dosing.

[0040] It should be noted that the mobile dosing device of this embodiment can withstand a pressure of 25MPa and can release 30 kg of reagents at a time. When the particle size of the reagent is between 16mm and 28mm, it can fall into the casing annulus by its own gravity. When the particle size of the reagent is below 16mm, a gas source (the gas in the gas source can be nitrogen, CNG, LNG, adjacent well production gas, etc.) can be used as a power source to speed up the reagent filling process.

[0041] Furthermore, the medicine storage tank 5 also includes a pressure gauge 53 and a pressure relief valve 54. The pressure gauge 53 is used to measure the pressure value in the sealed medicine storage tank 5. The pressure relief valve 54 is arranged on the tank body 51 and can be opened when the pressure in the tank body 51 reaches a set value. The set value of this embodiment is 25MPa. When the measured value of the pressure gauge 53 exceeds 25MPa, the pressure relief valve 54 opens to release the internal pressure of the medicine storage tank 5 to ensure the safety of the dosing process.

[0042] like Figure 1 As shown, the delivery pipe 3 is connected to the feed pipe 31, and the bottom end of the tank body 51 is connected to the feed pipe 31. A switch valve is provided on the feed pipe 31, and the switch valve is used to open or close the feed pipe 31. When adding medicine, the switch valve is opened, and the medicine in the tank body 51 enters the delivery pipe 3 through the feed pipe 31. When the adding of medicine is completed, the switch valve is closed. The switch valve can be opened manually or automatically. For example, the opening and closing of the switch valve can be controlled by the control module built into the mobile dosing device, and the control module can also control the opening and closing of the gas source and the gas volume adjustment, the opening and closing of the pressure relief valve 54 and other operations. The control unit is a prior art, and the working principle and working process of the control unit are not repeated here.

[0043] The delivery pipe 3 and the feed pipe 31 of this embodiment are generally Y-shaped structures, and the feed pipe 31 is arranged vertically upward so that the medicine in the tank 51 can quickly enter the delivery pipe 3 under the action of gravity. The delivery pipe 3 is arranged in an arc shape from top to bottom to speed up the delivery efficiency of the medicine.

[0044] Furthermore, the mobile dosing device further includes a second bracket 6, and the medicine storage tank 5 is supported and arranged on the second bracket 6, and the second bracket 6 is arranged at the upper end of the base 1 or at one side of the base 1. The second bracket 6 of this embodiment is a triangular bracket, and the triangular bracket includes three legs and a bearing ring, and a bearing ring is arranged at the top of the three legs, and the tank body 51 of the medicine storage tank 5 is supported and arranged on the bearing ring, so that the second bracket 6 can stably support the medicine storage tank 5, thereby improving the stability of the medicine storage tank 5.

[0045] The lengths of the three legs in this embodiment can be adjusted to adjust the height of the medicine storage tank 5, so that the medicine storage tank 5 and the feeding pipe 31 can be accurately installed. The three legs can be multi-stage telescopic rods driven by hydraulic cylinders, so as to quickly adjust the vertical height of the second bracket 6 by adjusting the length of the legs. In other embodiments, the legs can also be structures such as electric push rods driven by motors, as long as the height adjustment of the second bracket 6 can be achieved.

[0046] It should be noted that the bottom of the second bracket 6 of this embodiment is equipped with rollers to facilitate the rapid movement of the second bracket 6. The second bracket 6 can be fixedly or movably installed on the upper end of the base 1. In other embodiments, the second bracket 6 and the base 1 are arranged separately, so that the second bracket 6 and the medicine storage tank 5 are located on one side of the base 1, and the medicine storage tank 5 is connected to the feed pipe 31 through a hose.

[0047] like Figure 1 As shown, the first bracket 2 includes a plurality of columns arranged at intervals, the bottom end of each column is fixedly arranged on the upper end surface of the base 1, and the delivery pipe 3 is arranged on the top of the plurality of columns. The column of this embodiment has two columns and the height of the column is adjustable to flexibly adjust the inclination angle of the delivery pipe 3. The column of this embodiment can be a multi-stage telescopic rod driven by a hydraulic cylinder to quickly and accurately adjust the vertical height of the column. In other embodiments, the column can also be a structure such as an electric push rod driven by a motor, as long as the height adjustment of the column can be achieved.

[0048] like Figure 2 As shown, the nozzle 4 includes an outer tube 41 and an inner tube 42, the first end of the outer tube 41 is connected to the bottom end of the delivery pipe 3, and the second end of the outer tube 41 can be communicated with the casing flank. The inner tube 42 is inserted into the outer tube 41, and one end of the inner tube 42 is connected to the first end of the outer tube 41 and communicated with the bottom end of the delivery pipe 3. The outer tube 41 can be communicated with the casing flank, so that the outlet of the inner tube 42 is communicated with the casing annulus, and the reagent passes through the delivery pipe 3 and the inner tube 42 of the nozzle 4 and enters the casing annulus to realize the dosing process.

[0049] like Figure 2As shown, the outer tube 41 of this embodiment is a horizontal tube so as to be connected to the flank of the casing. The mobile dosing device also includes a universal tube 7 that can rotate 360°, and the two ends of the universal tube 7 are respectively connected to the first end of the outer tube 41 and the bottom end of the delivery tube 3, and the inner tube 42 is connected to the bottom end of the delivery tube 3 through the universal tube 7. The delivery tube 3 is connected to the outer tube 41 through the universal tube 7, so that the outer tube 41 can rotate 360° to flexibly adjust the direction of the nozzle 4, so that the outer tube 41 is connected to the flank of the casing in different directions, thereby improving the versatility of the mobile dosing device. The universal tube 7 of this embodiment can be a corrugated hose, and the two ends of the corrugated hose are respectively connected to the first end of the outer tube 41 and the bottom end of the delivery tube 3 by bolts. In other embodiments, the universal tube 7 can also be other pipelines, as long as it can achieve 360° rotation, which is not specifically limited here.

[0050] Furthermore, the inner tube 42 of the present embodiment is a variable diameter tube, and the inner diameter of the inner tube 42 gradually decreases along the direction from the first end to the second end of the outer tube 41 (the direction of movement of the medicine in the inner tube 42). As the inner diameter of the inner tube 42 gradually decreases, the medicine outlet at the end of the inner tube 42 has a pressurization effect, which increases the filling rate of the medicine, thereby improving the dosing efficiency.

[0051] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Mobile dosing device, characterized in that: include: A base (1) and a first bracket (2), wherein the first bracket (2) is liftably arranged on the base (1); A delivery pipe (3) and a nozzle (4), wherein the delivery pipe (3) is obliquely arranged on the first bracket (2), and the bottom end of the delivery pipe (3) is connected to the nozzle (4), and the nozzle (4) can be connected to the side wing of the casing in the well; The medicine storage tank (5) is connected to the gas source, and the medicine storage tank (5) is connected to the delivery pipe (3) to deliver medicine into the delivery pipe (3). The gas outlet of the gas source is connected to the top end of the delivery pipe (3) to blow air into the delivery pipe (3).

2. The mobile dosing device according to claim 1, characterized in that: The medicine storage tank (5) comprises: A tank body (51), wherein the top end of the tank body (51) has an opening for the medicine to enter, and the bottom end of the tank body (51) is connected to the delivery pipe (3). The sealing cover (52) can open or seal the opening of the tank body (51).

3. The mobile dosing device according to claim 2, characterized in that: The medicine storage tank (5) further comprises a pressure relief valve (54), which is arranged on the tank body (51) and can be opened when the pressure in the tank body (51) reaches a set value.

4. The mobile dosing device according to claim 2, characterized in that: The conveying pipe (3) is connected to a feed pipe (31), the bottom end of the tank body (51) is connected to the feed pipe (31), and a switch valve is provided on the feed pipe (31), and the switch valve is used to open or close the feed pipe (31).

5. The mobile dosing device according to claim 1, characterized in that: The mobile dosing device further comprises a second bracket (6), the medicine storage tank (5) is supported on the second bracket (6), and the second bracket (6) is arranged at the upper end of the base (1) or at one side of the base (1).

6. The mobile dosing device according to claim 1, characterized in that: The nozzle (4) comprises: An outer tube (41), wherein a first end of the outer tube (41) is connected to the bottom end of the delivery tube (3), and a second end of the outer tube (41) is capable of communicating with a flank of the casing; The inner tube (42) is inserted into the outer tube (41), and one end of the inner tube (42) is connected to the first end of the outer tube (41) and communicates with the bottom end of the delivery tube (3).

7. The mobile dosing device according to claim 6, characterized in that: The inner diameter of the inner tube (42) gradually decreases along the direction from the first end to the second end of the outer tube (41).

8. The mobile dosing device according to claim 6, characterized in that: The mobile dosing device further comprises a universal tube (7) capable of rotating 360 degrees, wherein two ends of the universal tube (7) are respectively connected to the first end of the outer tube (41) and the bottom end of the delivery tube (3), and the inner tube (42) is connected to the bottom end of the delivery tube (3) through the universal tube (7).

9. The mobile dosing device according to claim 8, characterized in that: The universal tube (7) is a corrugated hose, and the two ends of the corrugated hose are respectively connected to the first end of the outer tube (41) and the bottom end of the delivery tube (3) by bolts.

10. The mobile dosing device according to any one of claims 1 to 9, characterized in that: The lower end of the base (1) is provided with casters (8).

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