Sand surface observation device of sand tower for fracturing

Abstract

The utility model discloses a fracturing sand tower sand surface observation device which comprises a sand tower and further comprises an observation device, the sand tower is sequentially provided with a plurality of layers of tower bodies from top to bottom, the side face of each layer of tower body is provided with an installation hole, and the observation device is installed in the installation hole. A skylight is arranged at the top end of the sand tower. The observation device comprises a concentric-square-shaped plate and high-strength glass; the high-strength glass is matched with the mounting hole, the high-strength glass is placed in the mounting hole, and the concentric-square-shaped plates are installed on the inner side and the outer side of the mounting hole respectively and abut against the periphery of the high-strength glass. The observation device further comprises bolts, a plurality of first bolt holes are sequentially formed in the periphery of the mounting hole, and same second bolt holes are formed in the positions, corresponding to the first bolt holes, of the concentric-square-shaped plate. And bolts are mounted in the first bolt holes and the second bolt holes. The observation device is arranged, so that the device is simple in design and convenient to observe, and can be widely applied to the oil-gas field development process; and by arranging the skylight, subsequent sand adding can be facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas field fracturing construction, in particular to a sand tower sand surface observation device for fracturing. Background Art

[0002] In the process of oil and gas field development, fracturing plays an important role in increasing production and injection, especially in the development of low-permeability and ultra-low-permeability oil and gas reservoirs and unconventional energy. The main material used for fracturing is proppant, which is supported in the high-conductivity seams formed by fracturing and becomes the key factor for oil and gas growth after fracturing. With the improvement of fracturing technology, the scale of sand addition has gradually increased and the combination of proppant has diversified, forcing the fracturing team to use sand towers to add proppant. However, there is currently a lack of devices that can visually observe the inside of the sand tower.

[0003] For example, the invention patent with application number CN201010275359.1 discloses a method for visual monitoring of fracturing cracks. The method uses a room temperature curing fluid material as a fracturing fluid, injects the fluid material into a simulated wellbore of a core sample, and while the core sample is fracturing to produce cracks, the fluid material fills into the cracks and fills the cracks. After the fluid material solidifies to form a simulated crack, the simulated crack is taken out and the morphology of the simulated crack is observed. The method for visual monitoring of fracturing cracks of the present invention uses silicone oil and liquid silica gel as fracturing fluids, conducts a fracturing experiment on a prepared concrete core sample in a laboratory, takes out the cracks simulated by silica gel after the fracturing fluid fills the fracturing cracks and solidifies, and observes the morphology of the simulated cracks to reproduce the expansion morphology of the cracks at that time, thereby achieving the purpose of visualization.

[0004] Although this method of visual monitoring of hydraulic fractures can achieve the purpose of visualization by observing the morphology of the simulated fractures to reproduce the expansion morphology of the fractures at that time; however, this method of visual monitoring of hydraulic fractures is mainly used for observation in the laboratory. Due to the complexity of the monitoring method, the monitoring equipment cannot be popularized in the oil field and is not convenient to be used in the process of oil and gas field development; it needs further improvement. Utility Model Content

[0005] The utility model aims to provide a sand tower sand surface observation device for fracturing, aiming to improve the problems that the monitoring method of the sand tower sand surface observation device is complicated, the monitoring equipment cannot be popularized in oil fields, and it is not convenient to use it in the process of oil and gas field development.

[0006] The utility model is implemented as follows: a sand tower sand surface observation device for fracturing, comprising a sand tower and an observation device, wherein the sand tower is provided with multiple layers of tower bodies from top to bottom, and the side of each layer of the tower body is provided with a mounting hole, and the observation device is installed in the mounting hole; a skylight is provided at the top of the sand tower.

[0007] Preferably, the observation device includes a circular plate and high-strength glass; the high-strength glass is adapted to the mounting hole, the high-strength glass is placed in the mounting hole, and the circular plate is respectively installed on the inner and outer sides of the mounting hole and abuts against the periphery of the high-strength glass.

[0008] Preferably, the observation device also includes bolts, a plurality of first bolt holes are sequentially opened around the mounting hole, and the same second bolt holes are opened at positions of the circular plate corresponding to the first bolt holes; bolts are installed in the first bolt holes and the second bolt holes.

[0009] Preferably, the outer dimensions of the high-strength glass are consistent with the opening dimensions of the mounting hole, and the thickness is consistent with the thickness of the sand tower wall.

[0010] Preferably, the installation interface between the high-strength glass and the installation hole is covered by a circular plate, and glass glue is applied to the installation interface between the high-strength glass and the installation hole.

[0011] Preferably, the skylight is opened at the upper end of the sand tower and is arranged at the top of the uppermost tower body, and the multiple tower bodies are interconnected.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is simple in design and convenient for observation by setting an observation device, and can be widely used in the development process of oil and gas fields.

[0014] 2. The utility model provides a skylight, which makes it convenient to add sand later. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the mounting hole of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the circular plate of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the high-strength glass of the utility model;

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the observation device of the utility model.

[0020] In the figure: 1. sand tower; 2. tower body; 201. mounting hole; 202. first bolt hole; 3. observation device; 301. circular plate; 302. second bolt hole; 303. high-strength glass; 304. bolt; 4. skylight. DETAILED DESCRIPTION

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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.

[0022] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0023] Example 1

[0024] like Figure 1-Figure 5 As shown, a sand tower sand surface observation device for fracturing includes a sand tower 1 and an observation device 3, wherein the observation device 3 includes a circular plate 301 and a high-strength glass 303; the high-strength glass 303 is adapted to the mounting hole 201, the mounting hole 201 is a square hole of 15cm*15cm, the high-strength glass 303 is placed in the mounting hole 201, the outer size of the high-strength glass 303 is consistent with the opening size of the mounting hole 201, which is also 15cm*15cm, and the thickness is consistent with the thickness of the tower wall of the sand tower 1. After installation, the inner and outer sides of the high-strength glass 303 are flush with the inner and outer sides of the sand tower wall; the circular plates 301 are respectively installed on the inner and outer sides of the mounting hole, and abut against The surrounding of the high-strength glass 303 plays a role in fastening the high-strength glass 303; the installation interface between the high-strength glass 303 and the installation hole 201 is covered by the circular plate 301, and the installation interface between the high-strength glass 303 and the installation hole 201 is coated with glass glue; the observation device 3 also includes bolts 304, and 12 first bolt holes 202 are opened in sequence around the installation hole 201, and are opened evenly, and the same second bolt holes 302 are opened at the positions of the circular plate 301 corresponding to the first bolt holes 202; bolts 304 are installed in the first bolt holes 202 and the second bolt holes 302, and the circular plates 301 on the inner and outer sides are installed on the sand tower 1 through the bolts 304.

[0025] like Figure 1 and Figure 2 As shown, the sand tower 1 is provided with three layers of tower bodies 2 from top to bottom, and a mounting hole 201 is opened on the side of each layer of the tower body 2, and an observation device 3 is installed in the mounting hole 201 on the same side; the sand tower 1 is also provided with a skylight 4, which is opened at the top of the sand tower 1 and can be opened for adding sand.

[0026] Example 2

[0027] like Figure 1 and Figure 2 As shown, the sand tower 1 is provided with multiple layers of tower bodies 2 from top to bottom, and a mounting hole 201 is opened on the side of each layer of the tower body 2, and the observation device 3 is installed in the mounting hole 201; the sand tower 1 is also provided with a skylight 4, and the skylight 4 is opened at the top of the sand tower 1.

[0028] like Figure 1-Figure 5 As shown, a sand tower sand surface observation device for fracturing includes a sand tower 1 and an observation device 3, wherein the observation device 3 includes a circular plate 301 and a high-strength glass 303; the high-strength glass 303 is adapted to the mounting hole 201, and the high-strength glass 303 is placed in the mounting hole 201, and the outer size of the high-strength glass 303 is consistent with the size of the opening of the mounting hole 201, and the thickness is consistent with the thickness of the tower wall of the sand tower 1; the circular plates 301 are respectively installed on the inner and outer sides of the mounting hole, and abut against the high-strength glass 303; the installation interface between the high-strength glass 303 and the installation hole 201 is covered by the circular plate 301, and glass glue is applied to the installation interface between the high-strength glass 303 and the installation hole 201; the observation device 3 also includes bolts 304, and a plurality of first bolt holes 202 are sequentially opened around the installation hole 201, and the positions of the circular plate 301 corresponding to the first bolt holes 202 are all opened with the same second bolt holes 302; bolts 304 are installed in the first bolt holes 202 and the second bolt holes 302.

[0029] The working principle of the utility model is as follows: at the fracturing construction site, a bag filled with sand is lifted to the skylight 4 at the upper end of the sand tower 1 by a crane, and sand is added through the skylight 4, and the sand flows from the tower body (2) on the upper layer of the sand tower (1) into the sand tower (1) from top to bottom. As the fracturing continues, the observation device of each layer of the tower body (2) is used to observe the descent of the sand in different tower bodies (2), to judge the overall fracturing sand addition progress, and to calculate whether the actual amount of sand added corresponds to the sand ratio on the command vehicle; when the fracturing reaches the end, only the tower body (2) at the bottom layer has sand, and the specific position of the sand is observed through the observation device (3) of the bottom layer of the tower body (2) to judge the remaining amount of sand.

[0030] In summary, the utility model has a simple design and convenient observation by providing an observation device (3), and can be widely used in the development process of oil and gas fields; and the skylight (4) can facilitate the subsequent addition of sand.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand tower sand surface observation device for fracturing, comprising a sand tower (1), characterized in that: The sand tower (1) further comprises an observation device (3), wherein the sand tower (1) is provided with multiple layers of tower bodies (2) in sequence from top to bottom, and a mounting hole (201) is provided on the side of each layer of the tower body (2), and the observation device (3) is installed in the mounting hole (201); and a skylight (4) is provided at the top of the sand tower (1).

2. The sand tower sand surface observation device for fracturing according to claim 1, characterized in that: The observation device (3) comprises a circular plate (301) and high-strength glass (303); the high-strength glass (303) is adapted to the mounting hole (201), the high-strength glass (303) is placed in the mounting hole (201), and the circular plate (301) is respectively mounted on the inner and outer sides of the mounting hole and abuts against the periphery of the high-strength glass (303).

3. A sand tower sand surface observation device for fracturing according to claim 2, characterized in that: The observation device (3) further comprises a bolt (304); a plurality of first bolt holes (202) are sequentially provided around the mounting hole (201); identical second bolt holes (302) are provided at positions of the circular plate (301) corresponding to the first bolt holes (202); and bolts (304) are installed in the first bolt holes (202) and the second bolt holes (302).

4. The sand tower sand surface observation device for fracturing according to claim 2, characterized in that: The outer dimensions of the high-strength glass (303) are consistent with the opening dimensions of the mounting hole (201), and the thickness is consistent with the wall thickness of the sand tower (1).

5. The sand tower sand surface observation device for fracturing according to claim 2, characterized in that: The installation interface between the high-strength glass (303) and the installation hole (201) is covered by a circular plate (301), and glass glue is applied to the installation interface between the high-strength glass (303) and the installation hole (201).

6. The sand tower sand surface observation device for fracturing according to claim 1, characterized in that: The skylight (4) is opened at the upper end of the sand tower (1) and is arranged at the top of the uppermost tower body (2), and the multiple tower bodies (2) are interconnected.

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