Acid liquid system injection device

Abstract

The utility model discloses an acid liquor system injection device which comprises a plastic stirring box and a storage box fixed at the bottom of the plastic stirring box, and a stirring assembly used for stirring internal acid liquor is installed in the plastic stirring box. A stirring motor in the stirring assembly simultaneously drives a reverse rotating rod set and a forward rotating stirring rod in the stirring assembly to rotate in opposite directions through a meshing assembly, the bottom of a plastic stirring box is sealed and isolated from a storage box through a sealing valve set, two sets of synchronous driving motors are started to drive a pinch bar to rotate, and a valve cover is pushed into a through groove in the bottom of the stirring box; the side sealing sleeve on the outer side of the valve cover abuts against the inner wall of the stirring box to form sealing, and the bottom sealing strip on the top of the outer cover of the valve cover abuts against the bottom face of the stirring box to form sealing, so that the acid liquor which is not mixed completely can be prevented from entering the storage box, the storage box is prevented from being corroded, and the service life of the storage metal container is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field development, in particular to an acid liquid system injection device. Background Art

[0002] Oil well acidizing is an effective method to increase oil well production. It is a process measure to increase oil well production by injecting working acid into the formation through the wellbore, using the chemical reaction between the acid and the reactive minerals in the formation to dissolve the connected pores in the reservoir or the wall rocks of natural hydraulic fractures, increasing the flow capacity of the pores and fractures.

[0003] Oil well acid needs to be mixed with multiple acids before being injected into the ground. The mixed solution can effectively protect the metal in the oil well and can effectively remove blockages on the surface of sandstone and carbonate oil layers. Most of the current acid mixing equipment still uses metal containers for mixing and storage, but the unmixed acid is highly corrosive to metals. It is inevitable that it will corrode the cylinder wall and its interior during use, which greatly reduces the service life of the metal container. Utility Model Content

[0004] The utility model aims to provide an acid liquid system injection device in order to solve the problem that the metal container is corroded and has a short service life due to mixed storage of acid liquid in the metal container.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technologies: an acid liquid system injection device: comprising a plastic stirring box and a storage box fixed at the bottom of the plastic stirring box, the storage box being fixed by three groups of supporting legs, and two groups of liquid inlets being arranged on the top of the plastic stirring box; a stirring assembly for stirring the internal acid liquid being installed inside the plastic stirring box, and a stirring motor inside the stirring assembly simultaneously drives the internal reversing rod group and the forward stirring rod to rotate in opposite directions through a meshing assembly; the bottom of the plastic stirring box is sealed and isolated from the storage box by a sealing valve group, and a liquid outlet is arranged at the bottom of the storage box.

[0006] As a further description of an acid liquid system injection device of the above technology: the output end of the stirring motor is connected to the main shaft, and a plurality of groups of forward-rotating stirring rods are evenly distributed on the outside of the main shaft.

[0007] As a further description of an acid system injection device of the above technology: three groups of shaft sleeves are installed on the outside of the main shaft for limited rotation, and a reversing rod group is distributed on the outside of each group of shaft sleeves.

[0008] As a further description of the above-mentioned technology, an acid system injection device: the meshing assembly includes a first bevel gear fixed on the top of the main shaft and a second bevel gear fixed on the top of the sleeve, the first bevel gear and the second bevel gear are meshed with each other through a third bevel gear, and the third bevel gear is rotatably installed on one side of the positioning column.

[0009] As a further description of an acid system injection device of the above technology: the sealing valve group includes a first positioning seat fixed at the bottom of a plastic mixing box, a pry rod is hinged in the first positioning seat, the pry rod is driven to rotate by a driving motor, and the end of the pry rod away from the first positioning seat is hinged to a second positioning seat fixed at the bottom of the valve cover.

[0010] As a further description of an acid liquid system injection device of the above technology: a side sealing sleeve is provided on the outside of the valve cover that penetrates into the inner wall of the plastic mixing box, and a bottom sealing strip is also provided on the top of the abutting surface of the valve cover that abuts against the bottom surface of the plastic mixing box.

[0011] In summary, due to the adoption of the above-mentioned technology of an acid liquid system injection device, the beneficial effects of the utility model are:

[0012] 1. The utility model starts two sets of synchronous driving motors to drive the pry rod to rotate, pushes the valve cover into the through groove at the bottom of the mixing box, and the side sealing sleeve on the outside of the valve cover abuts against the inner wall of the mixing box to form a seal, and the bottom sealing strip on the top of the outer cover of the valve cover also abuts against the bottom surface of the mixing box to form a seal, which can prevent unmixed acid from entering the storage box, avoid corrosion of the storage box, and increase the service life of the storage metal container.

[0013] 2. The utility model starts the stirring motor to drive the main shaft to rotate, and when the main shaft rotates, it drives the forward-rotating stirring rod to rotate. At the same time, the main shaft drives the second bevel gear to rotate in the opposite direction through the third bevel gear meshing with the first bevel gear, so that the second bevel gear drives a group of shaft sleeves to reverse, and the reversing rod group integrally arranged outside the shaft sleeve rotates with the reverse rotation of the shaft sleeve, forming a rotation in the opposite direction to the forward-rotating stirring rod, disrupting the unidirectionality of the liquid flow, and having a better stirring effect and higher efficiency than unidirectional rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shows a stereogram provided according to an embodiment of the utility model;

[0015] Figure 2 A cross-sectional perspective view of a plastic mixing box provided according to an embodiment of the utility model is shown;

[0016] Figure 3 A bottom perspective view of a plastic mixing box provided according to an embodiment of the utility model is shown;

[0017] Figure 4 The embodiment provided according to the utility model is shown Figure 3 A magnified view of the structure at center;

[0018] Figure 5 A three-dimensional diagram showing a sealing valve assembly structure provided according to an embodiment of the utility model is shown.

[0019] Legend: 1. Plastic mixing box; 11. Liquid inlet; 12. Mixing assembly; 121. Mixing motor; 122. Main shaft; 123. Bushing; 124. Reverse lever assembly; 125. Forward mixing lever; 126. First bevel gear; 127. Second bevel gear; 128. Third bevel gear; 129. Positioning column; 13. Sealing valve assembly; 131. First positioning seat; 132. Pry bar; 133. Drive motor; 134. Second positioning seat; 135. Valve cover; 136. Side sealing sleeve; 137. Bottom sealing strip; 2. Storage box; 3. Support legs; 4. Liquid outlet. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technology of an acid system injection device in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 5 As shown, the utility model provides a technical solution: an acid liquid system injection device, comprising a plastic stirring box 1 and a storage box 2 fixed at the bottom of the plastic stirring box 1, the storage box 2 is fixed by three groups of supporting legs 3, and two groups of liquid inlets 11 are provided on the top of the plastic stirring box 1. A stirring assembly 12 for stirring the internal acid liquid is installed inside the plastic stirring box 1, and a stirring motor 121 inside the stirring assembly 12 drives the internal reversing rod group 124 and the forward stirring rod 125 to rotate in opposite directions at the same time through the meshing assembly. The bottom of the plastic stirring box 1 is sealed and isolated from the storage box 2 by a sealing valve group 13, which can effectively prevent the unmixed acidic liquid from long-term infection and corrosion of the metal box body, and a liquid outlet 4 is provided at the bottom of the storage box 2.

[0022] For details, please refer to Figure 1-Figure 3As shown, the output end of the stirring motor 121 is connected to the main shaft 122, and several groups of forward rotating stirring rods 125 are evenly distributed on the outside of the main shaft 122. The main shaft can drive the forward rotating stirring rod to rotate. Three groups of shaft sleeves 123 are installed on the outside of the main shaft 122 for limited rotation, and a reversing rod group 124 is distributed on the outside of each group of shaft sleeves 123. The meshing assembly includes a first bevel gear 126 fixed on the top of the main shaft 122 and a second bevel gear 127 fixed on the top of the shaft sleeve 123. The first bevel gear 126 and the second bevel gear 127 are meshed with each other through a third bevel gear 128, and the third bevel gear 128 is rotatably installed on one side of the positioning column 129. When the main shaft 122 rotates, the forward rotating stirring rod 125 rotates accordingly, and because the three groups of bevel gears are meshed with each other, when the main shaft 122 rotates, the reversing rod group 124 and the forward rotating stirring rod 125 move in opposite directions to each other, which can disrupt the rotation trajectory of the acid more quickly and mix it quickly.

[0023] In this embodiment, by starting the stirring motor 121, the main shaft 122 is driven to rotate, and when the main shaft 122 rotates, the forward-rotating stirring rod 125 is driven to rotate. At the same time, the main shaft 122 drives the second bevel gear 127 to rotate in the opposite direction through the third bevel gear 128 meshing with the first bevel gear 126, so that the second bevel gear 127 drives a group of sleeves 123 to reverse, and the reversing rod group 124 integrally arranged on the outside of the sleeve 123 rotates in the opposite direction with the sleeve 123, thereby forming a rotation in the opposite direction to the forward-rotating stirring rod 125, disrupting the unidirectionality of the liquid flow, and having a better stirring effect and higher efficiency than unidirectional rotation.

[0024] For details, please refer to Figure 4-Figure 5 As shown, the sealing valve group 13 includes a first positioning seat 131 fixed at the bottom of the plastic mixing box 1, and a pry bar 132 is hinged in the first positioning seat 131. The pry bar 132 is driven to rotate by a driving motor 133. The two sets of driving motors 133 move synchronously. The pry bar 132 is hinged to a second positioning seat 134 fixed at the bottom of the valve cover 135 at one end away from the first positioning seat 131. The outer side of the valve cover 135 that penetrates into the inner wall of the plastic mixing box 1 is provided with a side sealing sleeve 136, and the top of the abutting surface of the valve cover 135 abutting against the bottom surface of the plastic mixing box 1 is also provided with a bottom sealing strip 137.

[0025] In this embodiment, two sets of synchronous drive motors 133 are started to drive the pry rod to rotate, and the valve cover 135 is pushed into the through groove at the bottom of the mixing box 1, and the side sealing sleeve 136 on the outside of the valve cover 135 abuts against the inner wall of the mixing box 1 to form a seal, and the bottom sealing strip 137 on the top of the outer cover of the valve cover 135 also abuts against the bottom surface of the mixing box 1 to form a seal, which can prevent unmixed acid from entering the storage box 2, avoid corrosion of the storage box 2, and increase the service life of the storage metal container.

[0026] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical an acid system injection device and its utility model concept of the utility model, shall be equivalently replaced or changed, and shall be covered by the protection scope of the utility model.

Claims

1. An acid liquid system injection device, comprising a plastic stirring box (1) and a storage box (2) fixed at the bottom of the plastic stirring box (1), wherein the storage box (2) is fixed by three groups of supporting legs (3), and the top of the plastic stirring box (1) is provided with two groups of liquid inlets (11), characterized in that: The plastic stirring box (1) is provided with a stirring assembly (12) for stirring the acid liquid inside. The stirring motor (121) inside the stirring assembly (12) drives the reverse rotation rod group (124) and the forward rotation stirring rod (125) inside the stirring assembly (12) to rotate in opposite directions through the meshing assembly. The bottom of the plastic stirring box (1) is sealed and isolated from the storage box (2) by a sealing valve group (13). The bottom of the storage box (2) is provided with a liquid outlet (4).

2. The acid solution system injection device according to claim 1, characterized in that: The output end of the stirring motor (121) is connected to the main rotating shaft (122), and a plurality of groups of forward-rotating stirring rods (125) are evenly distributed outside the main rotating shaft (122).

3. The acid solution system injection device according to claim 2, characterized in that: The main shaft (122) is externally mounted with three sets of shaft sleeves (123) for limited rotation, and each set of shaft sleeves (123) is externally provided with a reversing rod set (124).

4. The acid solution system injection device according to claim 3, characterized in that: The meshing assembly comprises a first bevel gear (126) fixed on the top of the main rotating shaft (122) and a second bevel gear (127) fixed on the top of the shaft sleeve (123); the first bevel gear (126) and the second bevel gear (127) are meshed with each other via a third bevel gear (128); and the third bevel gear (128) is rotatably mounted on one side of a positioning column (129).

5. The acid solution system injection device according to claim 1, characterized in that: The sealing valve assembly (13) comprises a first positioning seat (131) fixed at the bottom of the plastic mixing box (1), a pry bar (132) is hinged inside the first positioning seat (131), the pry bar (132) is driven to rotate by a driving motor (133), and the end of the pry bar (132) away from the first positioning seat (131) is hinged to a second positioning seat (134) fixed at the bottom of the valve cover (135).

6. The acid solution system injection device according to claim 5, characterized in that: The valve cover (135) is penetrated through the inner wall of the plastic mixing box (1) and is provided with a side sealing sleeve (136) on its outer side, and the valve cover (135) is also provided with a bottom sealing strip (137) on the top of the abutting surface where the valve cover (135) abuts against the bottom surface of the plastic mixing box (1).

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