Underground sand prevention filler for oil well

Abstract

The utility model provides an underground sand prevention filler for an oil well. The underground sand prevention filler comprises a central pipe arranged on an inlet main body, a filter plate is mounted in the central pipe, two impact assemblies are arranged in the inlet main body, each impact assembly comprises a mounting block, a rotating rod, a connecting rod, an impact block and a telescopic spring, the mounting block is mounted on the filter plate, and the rotating rod is mounted on the connecting rod; the rotating rod is rotatably mounted on the mounting block, the connecting rod is mounted at one end, far away from the mounting block, of the rotating rod, the impact block is mounted on the connecting rod and matched with the central pipe, the telescopic spring is mounted on the connecting rod, and the bottom end of the telescopic spring is connected with the top of the filter plate. According to the underground sand prevention filler for the oil well, the impact assembly is arranged, so that the underground sand prevention filler for the oil well has the advantages that the structure is simple, the central pipe can be continuously impacted, oil on the inner wall of the central pipe flows downwards, and the phenomenon that oil solidification affects oil outlet work is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil production equipment, in particular to an oil well underground sand prevention filler. Background Art

[0002] At present, the wellheads used for fracturing and sand control operations are all fixed wellheads, which have a series of problems such as complex installation and disassembly. When the pipeline needs to be reversed to backwash the well after the fracturing filling is completed, the single-layer filling requires lifting the pipe string and throwing it away, and the layered sand control requires lifting the pipe string and changing layers. The fixed wellhead obviously cannot meet the requirements. First, the fixed wellhead is inconvenient to operate and has construction safety hazards. Secondly, in the layered sand control and layer changing construction, the base flange needs to be disassembled and installed when lifting the pipe string, which is a large workload and time-consuming, and there is a risk of sand stuck in the pipe string, which poses a great safety hazard. Third, if backwashing is blocked during single-layer filling and the pipe string needs to be lifted quickly, the existing wellhead structure cannot meet the requirements.

[0003] A sand-proof filling device is disclosed in the utility model patent with announcement number CN 207315314 U, wherein a fixed lifting ring is installed at the upper side of the main body through a rotating shaft, a lower cone is installed at the lower side of the main body, the lower cone is a truncated cone-shaped structure, an extrusion plate is installed on the outer wall of the main body, the extrusion plate is an arc-shaped plate-shaped structure, a fixed column is installed at the middle position inside the main body, the fixed column and the electric telescopic rod are installed together, and the addition of a fixed lifting ring facilitates the lifting of the utility model, wherein the counterweight iron inside the lower cone lowers the center of gravity of the utility model, thereby preventing the utility model from having a problem of excessive deviation during the lifting process, and the electric telescopic rod drives the extrusion plate to extrude the end face on the side away from the fixed column, thereby achieving the extrusion of the inner wall of the hole, thereby preventing the hole from collapsing, and reinforcing ribs are installed inside the extrusion plate, thereby preventing the extrusion plate from being damaged during the extrusion process.

[0004] Regarding the above-mentioned related technologies, the utility model applicant believes that there are the following defects:

[0005] 1. The sand control filling device requires a central tube for oil extraction. However, when the central tube is not in use, a large amount of oil will remain on its inner wall, and the oil will solidify over a long period of time. Therefore, if it is not cleaned, it will affect the next oil extraction work.

[0006] Therefore, it is necessary to provide a new oil well sand control packer to solve the above technical problems. Utility Model Content

[0007] The technical problem solved by the utility model is to provide an oil well sand prevention filler which has a simple structure by setting an impact component and can continuously impact the central tube, so that the oil on the inner wall of the central tube flows downward, reducing the oil solidification phenomenon that affects the oil production work.

[0008] In order to solve the above-mentioned technical problems, the utility model provides an oil well sand control filler including: a central tube arranged on an inlet body, a filter plate installed in the central tube, two impact assemblies are arranged in the inlet body, the impact assembly includes a mounting block, a rotating rod, a connecting rod, an impact block and a telescopic spring, the mounting block is installed on the filter plate, the rotating rod is rotatably installed on the mounting block, the connecting rod is installed on one end of the rotating rod away from the mounting block, the impact block is installed on the connecting rod, the impact block is adapted to the central tube, the telescopic spring is installed on the connecting rod, and the bottom end of the telescopic spring is connected to the top of the filter plate.

[0009] As a further solution of the utility model, the impact assembly also includes a moving rod, and the moving rod is arranged in the inlet body, and the moving rod is located on one side of the central tube.

[0010] As a further solution of the utility model, the impact assembly also includes a limit plug block, the limit plug block is installed on the bottom end of the moving rod, and the limit plug block is adapted to the connecting rod.

[0011] As a further solution of the utility model, a sealing plate is installed in the inlet body, and the top end of the moving rod extends to above the top of the sealing plate and is slidably connected to the sealing plate.

[0012] As a further solution of the utility model, a movable plate is provided above the top of the inlet body, and the movable plate is slidably connected to the central tube. Two electric telescopic rods are installed on the inlet body, and the output shafts of the two electric telescopic rods are connected to the bottom of the movable plate.

[0013] As a further solution of the utility model, a controller and a timer are provided on the inlet body.

[0014] Compared with the related art, the oil well sand control packer provided by the utility model has the following beneficial effects:

[0015] 1. The utility model has a simple structure by arranging an impact component, and can continuously impact the central tube, so that the oil on the inner wall of the central tube flows downward, reducing the solidification of the oil and affecting the oil output work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 It is a structural schematic diagram of the impact component in the utility model. DETAILED DESCRIPTION

[0020] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 The structure of the utility model is shown in FIG. Figure 1 ; Figure 2 The structure of the utility model is shown in FIG. Figure 2 ; Figure 3 The structure diagram of the impact assembly in the utility model. The oil well sand control packer comprises: a central tube 2 arranged on an inlet body 1, a filter plate 3 is installed in the central tube 2, two impact assemblies are arranged in the inlet body 1, the impact assembly comprises a mounting block 4, a rotating rod 5, a connecting rod 6, an impact block 7 and a telescopic spring 8, the mounting block 4 is mounted on the filter plate 3, the rotating rod 5 is rotatably mounted on the mounting block 4, the connecting rod 6 is mounted on one end of the rotating rod 5 away from the mounting block 4, the impact block 7 is mounted on the connecting rod 6, the impact block 7 is adapted to the central tube 2, the telescopic spring 8 is mounted on the connecting rod 6, and the bottom end of the telescopic spring 8 is connected to the top of the filter plate 3.

[0021] The impact assembly further includes a moving rod 9 , which is disposed in the inlet body 1 and is located at one side of the central tube 2 .

[0022] The impact assembly further includes a limit block 10 , which is mounted on the bottom end of the moving rod 9 and is matched with the connecting rod 6 .

[0023] A sealing plate 11 is installed in the inlet body 1 , and the top end of the moving rod 9 extends to above the top of the sealing plate 11 and is slidably connected to the sealing plate 11 .

[0024] A movable plate 12 is provided above the top of the inlet body 1 , and the movable plate 12 is slidably connected to the central tube 2 . Two electric telescopic rods 13 are installed on the inlet body 1 , and the output shafts of the two electric telescopic rods 13 are connected to the bottom of the movable plate 12 .

[0025] The inlet body 1 is provided with a controller 14 and a timer 15 .

[0026] The working principle of the oil well sand prevention filler provided by the utility model is as follows:

[0027] The first step: pumping oil through the central tube 2, and timing is performed by the timer 15. When the time is up, the two electric telescopic rods 13 are started by the controller 14, and the movable plate 12 is driven to move up and down by the output shaft of the electric telescopic rod 13, and the movable plate 12 will drive the two movable rods 9 to move up and down, and the two movable rods 9 will respectively drive the two limit plugs 10 to move up and down. When the limit plugs 10 contact and press down with the connecting rod 6, the impact block 7 can hit the central tube 2, so that the central tube 2 can be prevented from being blocked. When the moving rod 9 drives the limit plug 10 to move upward away from the connecting rod 6, the telescopic spring 8 pressed down by the connecting rod 6 will drive the connecting rod 6 and the impact block 7 to move upward due to the effect of elasticity. Therefore, under the reciprocating motion, it can continuously hit the central tube 2, thereby preventing the central tube 2 from being blocked and affecting the oil output.

[0028] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0029] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0030] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A sand control packer for oil wells, characterized in that: include: A central tube is arranged on the inlet body, a filter plate is installed in the central tube, two impact assemblies are arranged in the inlet body, the impact assembly includes a mounting block, a rotating rod, a connecting rod, an impact block and a telescopic spring, the mounting block is mounted on the filter plate, the rotating rod is rotatably mounted on the mounting block, the connecting rod is mounted on one end of the rotating rod away from the mounting block, the impact block is mounted on the connecting rod, the impact block is adapted to the central tube, the telescopic spring is mounted on the connecting rod, and the bottom end of the telescopic spring is connected to the top of the filter plate.

2. The oil well sand control packer according to claim 1, characterized in that: The impact assembly also includes a moving rod, which is arranged in the inlet body and located at one side of the central tube.

3. The oil well sand control packer according to claim 2, characterized in that: The impact assembly also includes a limit plug block, which is installed on the bottom end of the moving rod and is matched with the connecting rod.

4. The oil well sand control packer according to claim 2, characterized in that: A sealing plate is installed in the inlet body, and the top end of the moving rod extends to above the top of the sealing plate and is slidably connected with the sealing plate.

5. The oil well sand control packer according to claim 1, characterized in that: A movable plate is arranged above the top of the inlet body, and the movable plate is slidably connected with the central tube. Two electric telescopic rods are installed on the inlet body, and the output shafts of the two electric telescopic rods are connected with the bottom of the movable plate.

6. The oil well sand control packer according to claim 1, characterized in that: The inlet body is provided with a controller and a timer.

Images