A pressurized water injection device

Abstract

The application discloses a pressurized water injection device, which comprises a first pipe body, a second pipe body and a telescopic part. The second pipe body is arranged in the first pipe body, and the telescopic part is arranged in the second pipe body and can reciprocate along the axial direction of the second pipe body. The telescopic part comprises a telescopic rod and a third pipe body connected with the telescopic rod. A guide assembly is arranged between the telescopic rod and the second pipe body. The guide assembly comprises a support. The support is provided with a first guide body and a second guide body. The surface of the telescopic rod is provided with a guide groove extending along the axial direction of the telescopic rod. The first guide body and the second guide body are embedded in the guide groove so that the first guide body and the second guide body are arranged along the axial direction of the telescopic rod and can move along the guide groove. The first guide body and the second guide body can limit the moving direction of the telescopic rod, thereby ensuring the axial movement of the telescopic rod along the second pipe body, preventing the offset between the third pipe body and the second pipe body, ensuring the sealing performance between the second pipe body and the third pipe body, and thereby ensuring the pressure of water injection.

Description

Technical Field

[0001] This invention belongs to the field of oil production engineering technology, and in particular relates to a pressurized water injection device. Background Technology

[0002] Chinese invention patent application number 201910673546.6 discloses a downhole reciprocating water injection device, including a piston sleeve, a piston, a first one-way valve assembly, and a second one-way valve assembly. The piston sleeve is fixed in the well communicating with the oil layer. The upper end of the piston sleeve has a water supply port communicating with a water supply device, and the lower end of the piston sleeve has a water injection port communicating with the oil layer. The piston slides within the piston sleeve, and the outer wall of the piston and the inner wall of the piston sleeve are dynamically sealed. The piston has a first water flow channel communicating with the space above the piston sleeve located above the piston and the space below the piston sleeve located below the piston. The first one-way valve assembly is located at the first water flow channel, and the second one-way valve assembly is located at the water injection port.

[0003] The aforementioned water injection device uses two one-way valves to achieve pressurized water injection. However, the reciprocating movement of the piston during the pressurized water injection process causes wear. If the piston deviates during movement, it will lead to uneven wear, thereby affecting the piston's sealing performance and the water injection pressure. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a pressure-boosting water injection device that can guarantee water injection pressure.

[0005] The objective of this invention is achieved as follows: A pressurized water injection device includes a first pipe body, a second pipe body, and a telescopic component. The second pipe body is placed inside the first pipe body, and the telescopic component is placed inside the second pipe body and is capable of reciprocating along the axial direction of the second pipe body. The second pipe body includes a first opening and a second opening. The telescopic component includes a moving rod and a third pipe body connected to the moving rod. The third pipe body has an inlet at one end facing the first opening and a first one-way valve at one end facing the second opening. A second one-way valve is provided at the second opening. A guide assembly is provided between the moving rod and the second pipe body. The guide assembly includes a support member, which has a first guide body and a second guide body. The surface of the moving rod has a guide groove extending along its axial direction. The first guide body and the second guide body are embedded in the guide groove so that the first guide body and the second guide body are arranged along the axial direction of the moving rod and are capable of moving along the guide groove.

[0006] Furthermore, in this invention, a rotating rod is provided between the first guide body and the second guide body. The rotating rod includes a first end facing the moving rod and a second end opposite to it. A first connecting rod is provided on the rotating rod near the first end. The first guide body and the second guide body are connected by a second connecting rod corresponding to the position of the first connecting rod. The first connecting rod and the second connecting rod are rotatably connected. A limiting component is provided at the second end of the rotating rod to restrict the rotation of the rotating rod.

[0007] Furthermore, in this invention, the limiting component includes a plurality of first rotating blocks and second rotating blocks arranged in a ring at equal intervals. Both the first rotating blocks and the second rotating blocks are rotatable. The first rotating blocks and the second rotating blocks are staggered and arranged along the circumference of the moving rod. The rotating rod is connected to any one of the first rotating blocks.

[0008] Furthermore, in this invention, the first rotating block includes a first rotating plate, and the two sides of the first rotating plate are provided with abutment portions extending toward the second rotating block. The thickness of the abutment portion is greater than the thickness of the first rotating plate so that the abutment portion abuts against the second rotating block.

[0009] Furthermore, in this invention, the support member includes an annular member connected to the inner wall of the second tube, the annular member being provided with a support block extending toward the moving rod, the annular member being provided with a first mounting cavity, the support block being provided with a second mounting cavity, the first guide body and the second guide body being placed in the second mounting cavity, the limiting component being placed in the first mounting cavity, the first end of the rotating rod being placed in the second mounting cavity, and the second end of the moving rod being placed in the first mounting cavity.

[0010] Furthermore, in this invention, the annular component includes two annular plates connected to the inner wall of the second tube body. The two annular plates are arranged along the axial direction of the moving rod. A sealing ring is provided on the side of the two annular plates away from the inner wall of the second tube body. The annular plates, the sealing ring, and the inner wall of the second tube body together form the first mounting cavity.

[0011] Furthermore, in this invention, the support block includes two first side plates and two second side plates, which together form a quadrilateral structure. A third side plate is provided on the side of the support block facing the annular component. The first, second, and third side plates form a second mounting cavity. Both the first and second guide bodies are connected to support seats. The support seats are connected to connecting rods. The connecting rods are connected to the second connecting rod and the connecting rods are connected to guide rods. The third side plate is provided with a limiting groove. The guide rod is embedded in the limiting groove. The limiting groove is provided with a top plate. A limiting plate is provided at one end of the guide rod embedded in the limiting groove. The limiting plate and the top plate are mutually engaged.

[0012] Furthermore, in this invention, the guide rod includes a first section connecting the connecting rod and a second section embedded in the limiting groove, wherein the first section and the second section are rotatably connected.

[0013] Furthermore, in this invention, a rotating shaft is provided inside the support base, and the first guide body and the second guide body are rotatably placed inside the support base via the rotating shaft.

[0014] The beneficial effects of this invention are:

[0015] 1. The first guide body and the second guide body can restrict the movement direction of the moving rod, thereby ensuring that the moving rod moves along the axial direction of the second pipe body, preventing the third pipe body from deviating from the second pipe body, ensuring the sealing performance between the second pipe body and the third pipe body, and thus ensuring the water injection pressure.

[0016] 2. A space is left between the first rotating block and the second rotating block, so that the first rotating block has a certain rotation space, thereby allowing the rotating rod to have a certain rotation angle, thus allowing the moving rod to undergo a certain angular displacement, thereby providing redundancy for small displacements caused by vibration and other reasons, and reducing wear between the first guide body, the second guide body and the moving rod caused by the movement restriction of the first guide body and the second guide body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0020] Figure 4 This is a schematic diagram showing the positional relationship between the first tube, the second tube, and the moving rod;

[0021] Figure 5 This is a schematic diagram of the connection structure between the first guide body, the second guide body, and the rotating rod;

[0022] Figure 6 This is a schematic diagram showing how the tilting of the moving rod causes the positions of the first and second guide bodies to change.

[0023] Figure 7 This is a structural diagram of the limiting component;

[0024] The attached figures are labeled as follows: 100, first pipe body; 110, second check valve; 200, second pipe body; 201, first opening; 202, second opening; 210, upper chamber; 220, lower chamber; 300, third pipe body; 310, drainage chamber; 320, first check valve; 400, moving rod; 401, guide groove; 410, water inlet section; 411, water inlet channel; 412, water inlet; 500, first guide body; 510, second guide body; 520, support base; 521, connecting rod; 522, second connecting rod; 530, guide rod; 53 1. First segment; 532. Second segment; 533. Limiting plate; 600. Ring component; 601. First mounting cavity; 610. Ring plate; 620. Sealing ring; 700. Support block; 701. Second mounting cavity; 710. First side plate; 720. Second side plate; 730. Third side plate; 731. Bearing; 732. Limiting groove; 733. Top plate; 800. Rotating rod; 801. First end; 802. Second end; 810. First connecting rod; 900. First rotating block; 901. Abutment part; 902. First rotating plate; 910. Second rotating block. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] See Figure 1A pressurized water injection device includes a first pipe body 100, a second pipe body 200 disposed within the first pipe body 100, and a telescopic component disposed within the second pipe body 200. The telescopic component includes a third pipe body 300 and a movable rod 400 connected to the third pipe body 300. The outer wall of the third pipe body 300 and the inner wall of the second pipe body 200 are in a sealed sliding fit, causing the third pipe body 300 to divide the internal space of the second pipe body 200 into an upper chamber 210 and a lower chamber 220. The second pipe body 200 includes a first opening 201 and a second opening 202, the first opening 201 communicating with the upper chamber 210 and the second opening 202 communicating with the lower chamber 220. A drainage chamber 310 is disposed within the third pipe body 300, and a first one-way valve 320 is disposed on the side of the third pipe body 300 facing the second opening 202, the first one-way valve 320 restricting water from flowing from the lower chamber 220 into the drainage chamber 310. The third tube 300 is connected to the moving rod 400 on the side facing the first opening 201. The moving rod 400 has a water inlet section 410 that is threaded into the third tube 300. The water inlet section 410 has a water inlet channel 411, and a water inlet 412 is provided on its side wall, connecting the upper chamber 210 and the drainage chamber 310. A second one-way valve 110 is provided at the second opening 202, which restricts water from flowing into the second tube 200 from the second opening 202. The moving rod 400 is connected to a submersible linear motor and drives it to reciprocate within the second tube 200, thereby causing the third tube 300 to reciprocate within the second tube 200. When the third tube 300 moves toward the second opening 202, the third tube 300 and the first one-way valve 320 squeeze the water in the lower chamber 220, thereby pressurizing the water in the lower chamber 220. When the pressure of the water in the lower chamber 220 is greater than the opening pressure of the second one-way valve 110, the second one-way valve 110 is pushed open, and the pressurized water flows out from the second one-way valve 110 to the outside of the third tube 300, thereby pressurizing and injecting water into the oil layer. Then the moving rod 400 moves toward the first opening 201. At this time, because the water in the lower chamber 220 is squeezed out, the upward movement of the moving rod 400 drives the third tube 300 to move upward, thereby creating a negative pressure in the lower chamber 220. The first one-way valve 320 opens under the attraction of the negative pressure, and the water in the upper chamber 210 flows into the lower chamber 220 through the inlet 412, the inlet channel 411, the drainage chamber 310, and the opened first one-way valve 320. This process is repeated to achieve pressurized water injection into the oil layer.

[0027] See Figures 2 to 4A guide assembly is provided between the moving rod 400 and the second tube 200. The guide assembly includes a support member and a first guide body 500 and a second guide body 510 mounted on the support member. The support member includes an annular member 600 on the inner wall of the second tube 200, and the annular member 600 is connected to a support block 700 extending toward the moving rod 400. The annular member 600 includes two annular plates 610 arranged axially along the second tube 200, and a sealing ring 620 is provided on the side of the two annular plates 610 away from the second tube 200. The two annular plates 610, the sealing ring 620, and the inner wall of the second tube 200 form a first mounting cavity 601. The support block 700 includes two opposing first side plates 710 and two opposing second side plates 720, which form a quadrilateral structure. A third side plate 730 is provided on the side of the first side plates 710 and second side plates 720 facing the annular member 600. The first side plates 710, second side plates 720, and third side plates 730 form a barrel-shaped structure with an opening facing the moving member. The interior of the barrel-shaped structure is a second mounting cavity 701. The first guide body 500 and the second guide body 510 are installed inside the second mounting cavity 701.

[0028] See Figure 2 The first guide body 500 and the second guide body 510 are arranged along the axial direction of the second tube 200 so that they are on the same straight line. A guide groove 401 is provided on the surface of the moving rod 400, and the first guide body 500 and the second guide body 510 are embedded in the guide groove 401. Two sets of the first guide body 500 and the second guide body 510 are provided and symmetrically arranged on both sides of the moving rod 400. The first guide body 500 and the second guide body 510 can restrict the movement direction of the moving rod 400, allowing the moving rod 400 to move along the axial direction of the second tube 200, thereby driving the third tube 300 to move along the axial direction of the second tube 200, reducing uneven wear between the third tube 300 and the second tube 200, and ensuring the sealing between the third tube 300 and the second tube 200.

[0029] See Figure 2 , Figure 3 , Figure 5 , Figure 6A rotating rod 800 is provided between the first guide body 500 and the second guide body 510. Two first connecting rods 810 are symmetrically arranged on the rotating rod 800. Both the first guide body 500 and the second guide body 510 are provided with second connecting rods 522, which are hinged to their corresponding first connecting rods 810. When the moving rod 400 deviates from its original position, the guide groove 401 will shift relative to its original position. This shift will cause the first guide body 500 and the second guide body 510 to move in opposite directions. Under the influence of the first connecting rods 810 and the second connecting rods 522, the rotating rod 800 will rotate. The rotating rod 800 includes a first end 801 and a second end 802. The first end 801 faces the moving rod 400, and the second end 802 faces the inner wall of the second tube 200. The first connecting rod 810 is located on the side closest to the first end 801. The rotating rod 800 passes through the third side plate 730, with one part placed in the first mounting cavity 601 and the other part placed in the second mounting cavity 701. A bearing 731 is provided on the third side plate 730 so that the rotating rod 800 can be rotatably placed on the third side plate 730.

[0030] See Figure 2 , Figure 7 A limiting assembly for restricting the rotation of the rotating rod 800 is provided within the first mounting cavity 601. The limiting assembly includes multiple first rotating blocks 900 and multiple second rotating blocks 910. The first rotating blocks 900 are rotatably positioned on the outer wall of the sealing ring 620 via a rotating shaft. The multiple first rotating blocks 900 and multiple second rotating blocks 910 are arranged in a ring at equal intervals. The first rotating blocks 900 and second rotating blocks 910 are arranged vertically and staggered relative to each other, so that both ends of the rotating component abut against two second rotating blocks 910 respectively. The rotating rod 800 is connected to any one of the first rotating blocks 900, and rotation of the rotating rod 800 can drive the rotation of the first rotating block 900 connected to it. When the first rotating block 900 rotates, one end rises and the other end falls. The second rotating block 910 on the side where the first rotating block 900 falls falls and the other end rises. This transmission causes the second rotating block 910 on the side where the first rotating block 900 rises to fall, thereby restricting the rotation of the first rotating block 900. It also restricts the movement of the first guide body 500 and the second guide body 510, as well as the offset of the moving rod 400.

[0031] See Figure 5 , Figure 7The first rotating block 900 includes a first rotating plate 902. Both sides of the first rotating plate 902 are provided with abutment portions 901 extending toward the second rotating block 910. The thickness of the abutment portions 901 is greater than the thickness of the first rotating plate 902 so that the abutment portions 901 abut against the second rotating block 910, leaving a space between the first rotating block 900 and the second rotating block 910, so that the first rotating block 900 has a certain rotation space, thereby allowing the rotating rod 800 to have a certain rotation angle, thus allowing the moving rod 400 to undergo a certain angular offset, thereby providing redundancy for small-amplitude offsets caused by vibration and other reasons, and reducing wear between the first guide body 500, the second guide body 510 and the moving rod 400 caused by the movement restriction of the first guide body 500 and the second guide body 510.

[0032] See Figure 2 ,、 Figure 3 Both the first guide body 500 and the second guide body 510 are installed inside the support base 520. A rotating shaft is provided inside the support base 520. The first guide body 500 and the second guide body 510 are spherical and can be rotatably placed inside the support base 520 through the rotating shaft. The support base 520 is connected to a connecting rod 521, which is connected to a second connecting rod 522. The connecting rod 521 is connected to a guide rod 530. The third side plate 730 is provided with a limiting groove 732. The guide rod 530 is embedded in the limiting groove 732. Two top plates 733 are provided at the opening of the limiting groove 732. A limiting plate 533 is provided at one end of the guide rod 530 that is embedded in the limiting groove 732. The limiting plate 533 and the top plate 733 are mutually locked. The guide rod 530 includes a first section 531 connecting the connecting rod 521 and a second section 532 embedded in the limiting groove 732. The first section 531 and the second section 532 are rotatably connected, allowing them to rotate relative to each other. When the positions of the first guide body 500 and the second guide body 510 change due to the offset of the moving rod 400, the guide rod 530 moves along the limiting groove 732, supporting the movement of either the first guide body 500 or the second guide body 510. Simultaneously, the cooperation between the limiting plate 533 and the top plate 733 prevents the guide rod 530 from disengaging from the limiting groove 732, ensuring structural stability. The width of the limiting plate 533 is smaller than the width of the guide groove 401, leaving a gap between the limiting plate 533 and the limiting groove 732, providing space for the movement of the first guide body 500 and the second guide body 510, and preventing them from being jammed.

[0033] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A pressurized water injection device, characterized in that, The system includes a first pipe body (100), a second pipe body (200), and a telescopic component. The second pipe body (200) is placed inside the first pipe body (100). The telescopic component is placed inside the second pipe body (200) and can reciprocate along the axial direction of the second pipe body (200). The second pipe body (200) includes a first opening (201) and a second opening (202). The telescopic component includes a moving rod (400) and a third pipe body (300) connecting the moving rod (400). The third pipe body (300) has an inlet (412) at one end facing the first opening (201) and a first... A one-way valve (320) is provided, and a second one-way valve (110) is provided at the second opening (202). A guide assembly is provided between the moving rod (400) and the second tube (200). The guide assembly includes a support member. The support member is provided with a first guide body (500) and a second guide body (510). The surface of the moving rod (400) is provided with a guide groove (401) extending along its axial direction. The first guide body (500) and the second guide body (510) are embedded in the guide groove (401) so that the first guide body (500) and the second guide body (510) are arranged along the axial direction of the moving rod (400) and can move along the guide groove (401). A rotating rod (800) is provided between the first guide body (500) and the second guide body (510). The rotating rod (800) includes a first end (801) facing the moving rod (400) and a second end (802) opposite to it. A first connecting rod (810) is provided on the rotating rod (800) near the first end (801). The first guide body (500) and the second guide body (510) are connected by a second connecting rod (522) corresponding to the position of the first connecting rod (810). The first connecting rod (810) and the second connecting rod (522) are rotatably connected. A limiting component is provided at the second end (802) of the rotating rod (800) to limit the rotation of the rotating rod (800).

2. The pressurized water injection device according to claim 1, characterized in that, The limiting component includes a plurality of first rotating blocks (900) and second rotating blocks (910) arranged in a ring at equal intervals. Both the first rotating blocks (900) and the second rotating blocks (910) are rotatable. The first rotating blocks (900) and the second rotating blocks (910) are staggered and arranged along the circumference of the moving rod (400). The rotating rod (800) is connected to any one of the first rotating blocks (900).

3. The pressurized water injection device according to claim 2, characterized in that, The first rotating block (900) includes a first rotating plate (902), and the first rotating plate (902) has abutment portions (901) extending toward the second rotating block (910) on both sides. The thickness of the abutment portions (901) is greater than the thickness of the first rotating plate (902) so that the abutment portions (901) abut against the second rotating block (910).

4. The pressurized water injection device according to claim 1, characterized in that, The support member includes an annular member (600) connected to the inner wall of the second tube (200). The annular member (600) is provided with a support block (700) extending toward the moving rod (400). A first mounting cavity (601) is provided inside the annular member (600). A second mounting cavity (701) is provided inside the support block (700). The first guide (500) and the second guide (510) are placed inside the second mounting cavity (701). The limiting component is placed inside the first mounting cavity (601). The first end (801) of the rotating rod (800) is placed inside the second mounting cavity (701). The second end (802) of the rotating rod (800) is placed inside the first mounting cavity (601).

5. A pressurized water injection device according to claim 4, characterized in that, The annular component (600) includes two annular plates (610) that connect to the inner wall of the second tube (200). The two annular plates (610) are arranged along the axial direction of the moving rod (400). A sealing ring (620) is provided on the side of the two annular plates (610) away from the inner wall of the second tube (200). The annular plates (610), the sealing ring (620), and the inner wall of the second tube (200) together form the first mounting cavity (601).

6. The pressurized water injection device according to claim 4, characterized in that, The support block (700) includes two first side plates (710) and two second side plates (720). The first side plates (710) and the second side plates (720) form a quadrilateral structure. A third side plate (730) is provided on the side of the support block (700) facing the annular component (600). The first side plates (710), the second side plates (720), and the third side plates (730) form the second mounting cavity (701). The first guide body (500) and the second guide body (510) are both connected to a support seat (520). 520) is connected to a connecting rod (521), the connecting rod (521) is connected to the second connecting rod (522), the connecting rod (521) is connected to a guide rod (530), the third side plate (730) is provided with a limiting groove (732), the guide rod (530) is embedded in the limiting groove (732), the limiting groove (732) is provided with a top plate (733), one end of the guide rod (530) embedded in the limiting groove (732) is provided with a limiting plate (533), the limiting plate (533) and the top plate (733) are mutually locked.

7. A pressurized water injection device according to claim 6, characterized in that, The guide rod (530) includes a first section (531) connecting the connecting rod (521) and a second section (532) embedded in the limiting groove (732), and the first section (531) and the second section (532) are rotatably connected.

8. A pressurized water injection device according to claim 6, characterized in that, The support base (520) is provided with a rotating shaft, and the first guide body (500) and the second guide body (510) are spheres that are rotatably placed in the support base (520) through the rotating shaft.

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