Self-cleaning sand setting device

Abstract

The utility model belongs to the technical field of sand setting devices, and discloses a self-cleaning sand setting device which comprises an inner pipe, only one end of the inner pipe is open, a plurality of sand washing holes are evenly formed in the inner pipe, a lower connector is installed at the open end of the inner pipe, an outer pipe is integrally arranged at the end, connected with the inner pipe, of the lower connector, the outer pipe completely covers the outer side of the inner pipe, and the sand washing holes are evenly formed in the inner pipe. An annular cavity is formed between the outer pipe and the inner pipe, the two ends of the outer pipe are open, and the other end of the outer pipe is connected with an upper connector. By the adoption of the structural design, when oil extraction equipment works again, well fluid impacts sand deposited in the annular cavity through the specially-designed sand washing hole to enable the sand to suspend, and therefore the oil extraction equipment works more stably; and the sand is taken away along with flowing well fluid, so that the sand which is continuously scoured (flushed) and deposited in the annular cavity of the sand setting pipe is completely flushed away, the purpose of self-cleaning is achieved, and the danger that the pipe column is buried by the sand is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of sand settling devices, in particular to a self-cleaning sand settling device. Background Art

[0002] Generally, when an oil well is in production, formation sand will enter the wellbore along with the well fluid, and will be pumped by the oil production equipment to the upper oil pipe and flow upward along with the well fluid. However, when the oil production equipment stops working for some reason, the well fluid will also stop flowing, and the sand in the well fluid will settle downwards. If it is not treated, the deposited sand will block the oil pipe, and there is a risk of sand burying the pipe column, making the oil production equipment unable to work normally. Utility Model Content

[0003] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a self-cleaning sand settling device.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0005] The self-cleaning sand settling device comprises an inner tube, wherein only one end of the inner tube is open, and a plurality of sand punching holes are evenly arranged on the inner tube. A lower joint is installed on the open end of the inner tube, and an outer tube is integrally formed on the end connected to the inner tube with the lower joint. The outer tube completely covers the outside of the inner tube, and an annular cavity is formed between the outer tube and the inner tube. Both ends of the outer tube are open, and the other end of the outer tube is connected to an upper joint.

[0006] It is further defined that the sand flushing hole is inclined toward the direction of the upper joint. Such a design is conducive to the downward spraying of the well fluid, which impacts the settled sand to make it suspended and flow away with the well fluid.

[0007] It is further defined that the angle between the sand flushing hole and the axis line is 30° to 50°. Such a design ensures the flow effect of the well fluid.

[0008] The beneficial effects of adopting the utility model are:

[0009] The structural design of the utility model is adopted to guide the sand to be deposited in the annular cavity. When the oil production equipment is working again, the well fluid passes through the specially designed sand flushing holes to impact the sand deposited in the annular cavity to suspend it and carry it away with the flowing well fluid. In this way, the sand deposited in the annular cavity of the sand settling pipe is continuously flushed (flushed) and all the sand is flushed away, so as to achieve the purpose of self-cleaning and avoid the danger of sand burying the pipe column. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0011] Figure 1It is a cross-sectional structural schematic diagram of an embodiment of the self-cleaning sand settling device of the utility model;

[0012] The main component symbols are described as follows:

[0013] Inner tube 1; sand punching hole 2; lower joint 3; outer tube 4; annular cavity 5; upper joint 6. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] like Figure 1 As shown, the self-cleaning sand settling device of the utility model comprises an inner tube 1, which is open at only one end, and is evenly provided with a plurality of sand flushing holes 2. A lower joint 3 is installed at the open end of the inner tube 1, and the lower joint 3 is integrally provided with an outer tube 4 at the end connected to the inner tube 1, and the outer tube 4 completely covers the outside of the inner tube 1, and an annular cavity 5 is formed between the outer tube 4 and the inner tube 1, and both ends of the outer tube 4 are open, and the other end of the outer tube 4 is connected to an upper joint 6.

[0016] In this embodiment, when the self-cleaning sand settling device is used, the sand enters from the upper joint 6 and is deposited in the annular cavity 5 under the obstruction of the inner tube 1. When the oil production equipment is running, the well fluid enters the inner tube 1 from the lower joint 3 and is discharged into the annular cavity 5 from the inclined sand flushing hole 2. Under the impact of this inclined well fluid, the sand deposited in the annular cavity 5 is driven to be suspended, and then flows away from the upper joint 6 with the flowing well fluid. Under continuous flushing and flushing, the sand deposited in the annular cavity of the sand settling tube is completely flushed away, thereby achieving the purpose of self-cleaning and avoiding the danger of sand burying the pipe column.

[0017] Preferably, the sand flushing hole 2 is inclined toward the upper joint 6. Such a design is conducive to the downward spraying of the well fluid, impacting the settled sand to suspend it and flow away with the well fluid. In fact, the specifications and dimensions of the sand flushing hole 2 can also be considered according to specific circumstances.

[0018] Preferably, the angle between the sand flushing hole 2 and the axis is 30° to 50°. Such a design ensures the flow effect of the well fluid. In fact, the inclination angle size of the sand flushing hole 2 can also be considered according to specific circumstances.

[0019] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A self-cleaning sand settling device, comprising an inner tube (1), characterized in that: The inner tube (1) is open at only one end. The inner tube (1) is evenly provided with a plurality of sand punching holes (2). A lower joint (3) is installed at the open end of the inner tube (1). The lower joint (3) is integrally provided with an outer tube (4) at the end connected to the inner tube (1). The outer tube (4) completely covers the outside of the inner tube (1). An annular cavity (5) is formed between the outer tube (4) and the inner tube (1). Both ends of the outer tube (4) are open. The other end of the outer tube (4) is connected to an upper joint (6).

2. The self-cleaning sand settling device according to claim 1, characterized in that: The sand flushing hole (2) is inclined towards the upper joint (6).

3. The self-cleaning sand settling device according to claim 2 is characterized in that: The angle between the sand-blasting hole (2) and the axis is 30° to 50°.

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