Sand control screen pipe capable of automatically removing blockage

Abstract

The utility model discloses a sand control screen pipe capable of automatically removing blockage, which solves the technical problem that the sand control screen pipe is easy to block. The device comprises a vertically arranged screen pipe body, a top end head is arranged at the top of the screen pipe body, a bottom end head is arranged at the bottom of the screen pipe body, and a plurality of filter screen holes are uniformly formed in the screen pipe body, and is characterized in that a plurality of filter screen covers are arranged in the screen pipe body, and the opening ends of the filter screen covers are fixedly connected with the screen pipe body respectively; the plurality of filter screen covers are communicated with the plurality of filter screen holes in a one-to-one correspondence manner; a plurality of filter screen covers are arranged in the screen pipe body, each filter screen cover is internally and slidably connected with an unblocking screen plate in the radial direction of the screen pipe body, a control mechanism is arranged in the screen pipe body, and the control mechanism is used for controlling the unblocking screen plates to move synchronously, so that the unblocking screen plates push out gravel blocked in the filter screen holes and the filter screen covers. The sand control device can reduce the risk of blockage of the sand control screen pipe, thereby ensuring smooth crude oil exploitation.

Description

Technical Field

[0001] This utility model belongs to the field of sand control screen pipe technology, specifically relating to a sand control screen pipe that can self-unblock. Background Technology

[0002] The main function of oilfield sand screens is sand control. In oil drilling and production operations, they are used to separate liquid sand, prevent formation sand from entering the wellbore, prevent sand particles from causing wear and blockage to downhole equipment, ensure smooth oil extraction, and protect the production capacity and lifespan of oil wells.

[0003] In existing technologies, as crude oil is extracted, it carries sand and gravel with it. As these sand and gravel accumulate, they can cause blockages in the sand control screen. Moreover, the sand control screen is located inside the oil well, making it inconvenient to clean effectively, and thus needs improvement. Utility Model Content

[0004] In order to solve all or some of the above problems, the purpose of this utility model is to provide a sand screen pipe that can self-unblock, which can reduce the risk of sand screen pipe blockage and thus ensure the smooth progress of crude oil extraction.

[0005] This utility model provides a sand-proof screen pipe that can self-unblock, including a vertically arranged screen pipe body, a top end and a bottom end of the screen pipe body, and a plurality of filter screen holes evenly arranged on the screen pipe body. Multiple filter screen covers are arranged inside the screen pipe body, and the opening ends of the multiple filter screen covers are respectively fixedly connected to the screen pipe body, and the multiple filter screen covers are connected to the multiple filter screen holes one by one.

[0006] Each of the filter screen covers has a deblocking mesh plate slidably connected radially to the screen tube body. The screen tube body is provided with a control mechanism, which is used to control the synchronous movement of multiple deblocking mesh plates so that the deblocking mesh plates push out the sand and gravel blocking the filter screen holes and the filter screen cover.

[0007] Optionally, each of the unblocking mesh plates is fixedly connected with a push rod, each push rod passes through the corresponding filter screen and slides in cooperation with the corresponding filter screen, and the control mechanism is used to control the multiple push rods to slide synchronously along the radial direction of the screen tube body.

[0008] Optionally, the control mechanism includes a plurality of control rings respectively disposed in the screen tube body, the plurality of control rings being arranged at equal intervals along the axial direction of the screen tube body, the plurality of push rods located at the same layer being aligned with the corresponding control rings respectively, and a drive mechanism for driving the plurality of control rings to move synchronously along the axial direction of the screen tube body is provided in the screen tube body.

[0009] Each of the control rings has multiple support rods fixedly connected to its outer wall, and each support rod has a control plate fixedly connected to it. Each push rod has a pressure plate at one end away from the corresponding unblocking mesh plate, and the multiple control plates are aligned with the multiple pressure plates one by one.

[0010] Each of the control plates is provided with a control ramp, and the pressure plate can slide toward the edge of the screen tube body under the action of the control ramp. Each of the filter screens is provided with a return spring, which is used to push the corresponding pressure plate toward the center of the screen tube body.

[0011] Optionally, each of the pressure plates is provided with a guide ramp, and the guide ramp fits and abuts tightly with the corresponding control ramp.

[0012] Optionally, each of the reset springs is sleeved on the corresponding push rod, and one end of the reset spring is fixedly connected to the corresponding pressure plate and the other end is fixedly connected to the corresponding filter screen.

[0013] Optionally, the drive mechanism includes:

[0014] There are two drive rods, each disposed within the screen tube body, and multiple control rings are fixedly connected to the two drive rods respectively;

[0015] A hydraulic mechanism is located at the top of the screen tube body and is used to control the two drive rods to move synchronously along the axial direction of the screen tube body.

[0016] Optionally, each of the control rings has two connecting ears symmetrically fixedly connected to its inner wall, and the connecting ears are fixedly connected to the corresponding drive rod.

[0017] Optionally, the hydraulic mechanism includes two hydraulic cylinders that are vertically mounted on the top of the screen tube body. Each hydraulic cylinder has a piston rod that is vertically slidably connected inside. The uppermost control ring is fixed to the bottom of the two piston rods. Each hydraulic cylinder has a hydraulic oil pipe connected to its top. The two hydraulic oil pipes are connected to the pump oil lines of an external hydraulic station. Each hydraulic cylinder is equipped with a return spring for pushing the corresponding piston rod upward.

[0018] Optionally, the two hydraulic cylinders are respectively fixedly connected to the top end via reinforcing plates.

[0019] Optionally, the top end is symmetrically provided with two limiting notches and two clamping buckles, and the two clamping buckles respectively clamp and limit the corresponding hydraulic oil pipes within the corresponding limiting notches.

[0020] As can be seen from the above technical solution, the self-unclogging sand screen pipe provided by this utility model has the following advantages:

[0021] This sand screen can remove sand and gravel that are clogging the filter screen holes and filter screen cover by unclogging the screen plate, reducing the risk of clogging and ensuring the smooth progress of crude oil extraction. At the same time, multiple filter screen holes can be unclogging simultaneously to ensure the filtration capacity and operational stability of the sand screen.

[0022] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0027] Figure 4 for Figure 2 Enlarged schematic diagram of region B in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Screen tube body; 2. Top end; 3. Bottom end; 4. Filter screen hole; 5. Filter screen cover; 6. Unblocking screen plate; 7. Push rod; 8. Control mechanism; 81. Control ring; 82. Support rod; 83. Control plate; 84. Pressure plate; 85. Control inclined plane; 86. Guide inclined plane; 87. Return spring; 9. Drive mechanism; 91. Drive rod; 92. Connecting ear; 10. Hydraulic mechanism; 101. Hydraulic cylinder; 102. Piston rod; 103. Hydraulic oil pipe; 104. Return spring; 11. Limit notch. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0031] like Figures 1-4 The illustration shows an embodiment of the present invention, which discloses a self-unclogging sand-proof screen pipe, comprising a vertically arranged screen pipe body 1, a top end 2 fixedly connected to the top of the screen pipe body 1, a bottom end 3 fixedly connected to the bottom of the screen pipe body 1, and a plurality of filter screen holes 4 evenly arranged on the screen pipe body 1. A plurality of filter screen covers 5 are arranged inside the screen pipe body 1, and the open ends of the plurality of filter screen covers 5 are respectively fixedly connected to the screen pipe body 1, and the plurality of filter screen covers 5 are connected to the plurality of filter screen holes 4 in a one-to-one correspondence.

[0032] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 As shown, each filter screen 5 has a deblocking mesh plate 6 slidably connected to it along the radial direction of the screen tube body 1. Each deblocking mesh plate 6 has a push rod 7 fixedly connected to it, and the push rod 7 is arranged along the radial direction of the screen tube body 1. Each push rod 7 passes through the corresponding filter screen 5 and slides with the corresponding filter screen 5. At the same time, the screen tube body 1 is provided with a control mechanism 8 for controlling the synchronous sliding of multiple push rods 7 along the radial direction of the screen tube body 1.

[0033] In this embodiment, the sand-proof screen pipe uses the unblocking mesh plate 6 to push out the sand and gravel blocking the filter screen holes 4 and the filter screen cover 5, reducing the risk of clogging and ensuring smooth crude oil extraction. Simultaneously, the filter screen cover 5 and the unblocking mesh plate 6 both employ porous structures, ensuring that crude oil can pass through these structures into the screen pipe body 1, thus guaranteeing normal crude oil extraction.

[0034] In one embodiment, such as Figure 3 , Figure 4 As shown, the control mechanism 8 includes multiple control rings 81 respectively disposed within the screen tube body 1. The multiple control rings 81 are arranged at equal intervals along the axial direction of the screen tube body 1. Multiple push rods 7 located at the same layer are aligned with the corresponding control rings 81, that is, each control ring 81 corresponds to a layer of filter screen holes 4. At the same time, a drive mechanism 9 is provided inside the screen tube body 1, and the drive mechanism 9 is used to drive the multiple control rings 81 to move synchronously along the axial direction of the screen tube body 1.

[0035] In one embodiment, such as Figure 3 , Figure 4 As shown, each control ring 81 has multiple support rods 82 fixedly connected to its outer wall, and the multiple support rods 82 are aligned one-to-one with multiple push rods 7 at the same level. Each support rod 82 has a control plate 83 fixedly connected to it, and each push rod 7 has a pressure plate 84 at the end away from the corresponding unblocking mesh plate 6, and the multiple control plates 83 are aligned one-to-one with the multiple pressure plates 84.

[0036] In one embodiment, such as Figure 3 , Figure 4As shown, each control plate 83 is provided with a control inclined surface 85, and each pressure plate 84 is provided with a guide inclined surface 86. The guide inclined surface 86 fits and abuts tightly with the corresponding control inclined surface 85, and the pressure plate 84 can slide toward the edge of the screen tube body 1 under the combined action of the control inclined surface 85 and the guide inclined surface 86.

[0037] In one embodiment, such as Figure 3 , Figure 4 As shown, each push rod 7 is fitted with a return spring 87. One end of the return spring 87 is fixedly connected to the corresponding pressure plate 84, and the other end is fixedly connected to the corresponding filter screen 5. The return spring 87 is used to push the corresponding pressure plate 84 to slide toward the center position of the screen tube body 1.

[0038] Driven by the drive mechanism 9, multiple control rings 81 move synchronously downwards, causing multiple support rods 82 to drive their respective control plates 83 downwards. At this time, the pressure plate 84 slides towards the edge of the screen tube body 1 under the combined action of the control inclined surface 85 and the guide inclined surface 86. The push rod 7 drives the corresponding unblocking screen plate 6 to move synchronously, thereby pushing out the sand and gravel blocking the filter screen holes 4 and the filter screen cover 5. Similarly, driven by the drive mechanism 9, multiple control rings 81 move synchronously upwards, and multiple pressure plates 84, under the action of their respective return springs 87, drive their respective push rods 7 and unblocking screen plates 6 to move in the opposite direction and reset.

[0039] In one embodiment, such as Figure 3 , Figure 4 As shown, the drive mechanism 9 includes two drive rods 91 vertically disposed within the screen tube body 1. Each control ring 81 has two symmetrically fixed connecting ears 92 on its inner wall, and multiple connecting ears 92 are fixedly connected to corresponding drive rods 91, enabling the two drive rods 91 to jointly drive multiple control rings 81 to move synchronously vertically. Simultaneously, a hydraulic mechanism 10 is disposed at the top of the screen tube body 1, and the hydraulic mechanism 10 is used to control the synchronous movement of the two drive rods 91 along the axial direction of the screen tube body 1.

[0040] In one embodiment, such as Figure 3 , Figure 4 As shown, the hydraulic mechanism 10 includes two hydraulic cylinders 101 that are vertically mounted on the top of the screen tube body 1, and the two hydraulic cylinders 101 are fixedly connected to the top end head 2 through reinforcing plates. Each hydraulic cylinder 101 has a piston rod 102 that is vertically slidably connected inside it, and the uppermost control ring 81 is fixed to the bottom of the two piston rods 102.

[0041] In one embodiment, such as Figure 3 , Figure 4As shown, each hydraulic cylinder 101 is connected to a hydraulic oil pipe 103 at its top. The two hydraulic oil pipes 103 are connected to the pump oil line of the external hydraulic station. Each hydraulic cylinder 101 is equipped with a return spring 104 for pushing the corresponding piston rod 102 upward.

[0042] When the external hydraulic station pumps oil synchronously into the two hydraulic oil pipes 103, the two piston rods 102 move downward synchronously under hydraulic pressure. At this time, the uppermost control ring 81 moves downward, and under the action of the two drive rods 91, the remaining control rings 81 move downward synchronously. When the external hydraulic station is turned off, the piston rods 102 move upward under the action of the return spring 104. At this time, the two drive rods 91 and the multiple control rings 81 move upward synchronously and reset.

[0043] In one embodiment, such as Figure 3 , Figure 4 As shown, two limiting notches 11 and two clamping buckles 12 are symmetrically arranged on the top head 2, and the two clamping buckles 12 respectively clamp and limit the corresponding hydraulic oil pipe 103 within the corresponding limiting notch 11, thereby realizing the limiting and protection of the hydraulic oil pipe 103.

[0044] As can be seen from the above, the sand screen can self-unblock, that is, the sand and gravel blocking the filter screen holes 4 and the filter screen cover 5 are pushed out by the unblocking mesh plate 6, reducing the risk of sand screen blockage and thus ensuring the smooth progress of crude oil extraction.

[0045] It should be noted that, unless otherwise stated, the technical or scientific terms used in this utility model shall have the ordinary meaning as understood by those skilled in the art to which this utility model pertains.

[0046] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A self-unclogging sand screen pipe, comprising a vertically arranged screen pipe body (1), wherein the top of the screen pipe body (1) is provided with a top end head (2) and the bottom is provided with a bottom end head (3), and a plurality of filter screen holes (4) are uniformly arranged on the screen pipe body (1), characterized in that, The screen tube body (1) is provided with a plurality of filter screen covers (5), the opening ends of the plurality of filter screen covers (5) are respectively fixedly connected to the screen tube body (1), and the plurality of filter screen covers (5) are connected to the plurality of filter screen holes (4) one by one. Each of the filter screen covers (5) is slidably connected to a deblocking mesh plate (6) along the radial direction of the screen tube body (1). A control mechanism (8) is provided inside the screen tube body (1). The control mechanism (8) is used to control the synchronous movement of multiple deblocking mesh plates (6) so that the deblocking mesh plates (6) push out the sand and gravel blocked in the filter screen holes (4) and the filter screen cover (5).

2. The self-unblocking sand screen pipe according to claim 1, characterized in that, Each of the unblocking mesh plates (6) is fixedly connected with a push rod (7), each push rod (7) passes through the corresponding filter screen (5) and slides in cooperation with the corresponding filter screen (5), and the control mechanism (8) is used to control the multiple push rods (7) to slide synchronously along the radial direction of the screen tube body (1).

3. The self-unblocking sand screen pipe according to claim 2, characterized in that, The control mechanism (8) includes a plurality of control rings (81) respectively disposed in the screen tube body (1). The plurality of control rings (81) are arranged at equal intervals along the axial direction of the screen tube body (1). The plurality of push rods (7) located at the same layer are respectively aligned with the corresponding control rings (81). The screen tube body (1) is provided with a drive mechanism (9) for driving the plurality of control rings (81) to move synchronously along the axial direction of the screen tube body (1). Each of the control rings (81) has multiple support rods (82) fixedly connected to its outer wall. Each of the support rods (82) has a control plate (83) fixedly connected to it. Each push rod (7) has a pressure plate (84) at one end away from the corresponding unblocking mesh plate (6). The multiple control plates (83) and the multiple pressure plates (84) are aligned one by one. Each of the control plates (83) is provided with a control ramp (85), and the pressure plate (84) can slide toward the edge of the screen tube body (1) under the action of the control ramp (85). Each of the filter screen covers (5) is provided with a reset spring (87), and the reset spring (87) is used to push the corresponding pressure plate (84) to slide toward the center of the screen tube body (1).

4. The self-unclogging sand screen pipe according to claim 3, characterized in that, Each of the pressure plates (84) is provided with a guide slope (86), and the guide slope (86) fits and closely abuts against the corresponding control slope (85).

5. The self-unclogging sand screen pipe according to claim 3, characterized in that, Each of the reset springs (87) is respectively sleeved on the corresponding push rod (7), and one end of the reset spring (87) is fixedly connected to the corresponding pressure plate (84) and the other end is fixedly connected to the corresponding filter screen (5).

6. The self-unblocking sand screen pipe according to claim 3, characterized in that, The drive mechanism (9) includes: There are two drive rods (91), which are respectively set in the screen tube body (1), and multiple control rings (81) are respectively fixedly connected to the two drive rods (91); A hydraulic mechanism (10) is located on the top of the screen tube body (1) and is used to control the two drive rods (91) to move synchronously along the axial direction of the screen tube body (1).

7. The self-unblocking sand screen pipe according to claim 6, characterized in that, Each of the control rings (81) has two connecting ears (92) symmetrically fixedly connected to its inner wall, and the connecting ears (92) are fixedly connected to the corresponding drive rods (91).

8. The self-unclogging sand screen pipe according to claim 6, characterized in that, The hydraulic mechanism (10) includes two hydraulic cylinders (101) that are vertically mounted on the top of the screen tube body (1). Each hydraulic cylinder (101) has a piston rod (102) that is vertically slidably connected inside. The control ring (81) at the top is fixed to the bottom of the two piston rods (102). Each hydraulic cylinder (101) has a hydraulic oil pipe (103) connected to its top. The two hydraulic oil pipes (103) are connected to the pump oil lines of an external hydraulic station. Each hydraulic cylinder (101) is provided with a return spring (104) for pushing the corresponding piston rod (102) upward.

9. The self-unblocking sand screen pipe according to claim 8, characterized in that, The two hydraulic cylinders (101) are respectively fixedly connected to the top head (2) through reinforcing plates.

10. The self-unclogging sand screen pipe according to claim 8, characterized in that, The top end (2) is symmetrically provided with two limiting notches (11) and two clamping buckles (12), and the two clamping buckles (12) respectively clamp and limit the corresponding hydraulic oil pipe (103) within the corresponding limiting notch (11).

Images