Hydraulic injection tool

Abstract

The utility model relates to the technical field of underground oil displacement, in particular to a hydraulic injection tool. Comprising a hydraulic cylinder and a metering pump which are arranged up and down, the hydraulic cylinder provides power for the metering pump, and the hydraulic cylinder and the metering pump are installed on an inverted-U-shaped fixing plate. According to the utility model, an upper and lower double-plane positioning structure is constructed through the inverted U-shaped fixing plate, and an adjustable mounting platform is formed by matching with the longitudinal long holes, the bolts and the locking devices of the upper lug plate and the lower lug plate. The connecting assembly adopts a two-stage rotation adjusting mechanism of a connecting block and a rotating sleeve, and the axial fine adjustment compensation function of the hydraulic cylinder and the metering pump is achieved. The composite adjusting system can eliminate accumulated installation errors, ensures concentricity of the hydraulic cylinder and the metering pump, and greatly prolongs the service life compared with a traditional fixed installation mode.

Description

Technical Field

[0001] This utility model relates to the field of downhole oil recovery technology, specifically to hydraulic injection tools. Background Technology

[0002] In the field of oilfield production, in order to improve oil recovery, the method of injecting flux into the oil reservoir is adopted to achieve the goal of improving oil recovery. However, the flux needs to be injected into the oil reservoir using a flux injection tool.

[0003] Patent document CN205824477U discloses a foot-operated hydraulic injection device, including a foot pedal. The foot pedal 1 is connected to one end of a linkage lever 1, which is fixed by a lever support 1. A lever lock is provided below one end of the linkage lever 1. A return spring 1 is connected to the rod body of the linkage lever 1. The other end of the linkage lever 1 is connected to one end of a transmission rod, which is fixed to the left side of the physical shell by a fixing rod. The other end of the transmission rod is connected to one end of a second linkage lever, which is fixed to the top of the frame by a lever support 2. The other end of the linkage lever is connected to the piston rod of the hydraulic cylinder. The one-way valve of the hydraulic cylinder is connected to one end of the hydraulic oil suction pipe and one end of the hydraulic oil output pipe. The other end of the hydraulic oil suction pipe is connected to the oil tank. A pressure relief valve and a pressure gauge are installed on the hydraulic oil output pipe, which is also connected to one end of a high-pressure oil pipe. The other end of the high-pressure oil pipe is connected to a mechanical reset booster oil pan. A hydraulic piston is installed inside the mechanical reset booster oil pan, and a reset spring is installed on the inner wall of both the hydraulic piston and the mechanical reset booster oil pan. The push rod of the hydraulic piston is connected to the glue gun push rod. Due to its structure, this injection device suffers from inaccurate injection volume. Because it uses mechanical transmission, it experiences significant vibration and poor operational stability, affecting the injection effect. Therefore, some equipment uses a hydraulic cylinder-driven method to inject the injection agent into the oil layer.

[0004] Patent document CN201433753Y discloses a hydraulic plunger multi-cylinder adjustable injection device. This device includes a hydraulic station, whose hydraulic valve group is connected to 1-6 hydraulic cylinders via pipelines. The hydraulic cylinders are then connected to the plungers of a metering pump. The lower end of the metering pump's barrel is connected to a valve body, which has an inlet and an outlet. Both the inlet and outlet have check valves. The inlet is connected to an injection tank, and the outlet is connected to an injection well. During use, if the concentricity between the hydraulic cylinders and the metering pump is high, the plungers of the metering pump are prone to uneven wear, thus affecting the service life of the metering pump. Therefore, it is necessary to ensure the concentricity of the hydraulic cylinders and the metering pump during installation. Utility Model Content

[0005] The main purpose of this utility model is to provide a hydraulic injection tool that can ensure the concentricity of the hydraulic cylinder and the metering pump during installation, thereby improving the service life of the metering pump.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A hydraulic injection tool includes a base plate with a hydraulic station fixed to its upper end. An outlet pipe and an inlet pipe are fixed to the base plate in front of the hydraulic station. Multiple injection units are installed horizontally in front of the hydraulic station. Each injection unit includes a fixed plate fixed to the front of the hydraulic station. The fixed plate is inverted U-shaped, with two straight sections positioned vertically. Each straight section has a longitudinal groove. Longitudinal elongated holes are formed on the straight sections on both sides of the grooves. A hydraulic cylinder is installed at the upper end of the upper straight section of the fixed plate, and a metering pump is installed at the upper end of the lower straight section. The metering pump includes a pump barrel and a plunger inside the pump barrel. A valve body is connected to the lower end of the metering pump, located in the lower groove. Inside, the valve body's inlet and outlet are flexibly connected to the inlet manifold and outlet manifold, respectively. The lower end of the hydraulic cylinder is fixed with two symmetrical upper ear plates, and the lower end of the metering pump is fixed with two symmetrical lower ear plates. The upper and lower ear plates on the same side are connected by bolts, which pass through a long hole on one side. Two nuts are threaded onto the bolts. The lower nut is tightly against the lower end of the flat part below the fixed plate, and the lower end of the upper nut is tightly against the upper end of the lower ear plate. The upper end of the metering pump's plunger is connected to the lower end of the hydraulic cylinder's telescopic rod through a connecting assembly. The telescopic rod of the hydraulic cylinder is located in the groove of the flat part above the fixed plate. A hydraulic valve group is fixed at the upper end of the hydraulic station, and the hydraulic valve group is connected to the hydraulic cylinder and the hydraulic station through an oil pipe.

[0008] Specifically, the outlet pipe and inlet pipe are horizontally arranged, with one end of the outlet pipe blocked and the other end connected to the injection well, and one end of the inlet pipe blocked and the other end connected to the injection tank.

[0009] Specifically, the inlet and outlet of the valve body are connected to the inlet manifold and outlet manifold respectively via pressure-resistant hoses. An inlet check valve is installed in the inlet of the valve body, and an outlet check valve is installed in the outlet of the valve body.

[0010] Specifically, the connecting assembly includes a connecting block that is threadedly connected to the telescopic end of the hydraulic cylinder telescopic rod. The connecting block is concentric with the hydraulic cylinder, and a rotating sleeve is rotatably connected to the lower end of the connecting block. The rotating sleeve is threadedly connected to the upper end of the plunger of the metering pump.

[0011] Specifically, the outer circumference of the rotating sleeve is provided with a plurality of blind holes, the axis of which is perpendicular to the axis of the rotating sleeve.

[0012] Specifically, the telescopic rod and plunger of the hydraulic cylinder are both threaded with clamping nuts. The two clamping nuts are arranged one above the other, with the upper clamping nut pressing against the upper end of the connecting block and the lower clamping nut pressing against the lower end of the rotating sleeve.

[0013] Specifically, the bolt passes through the holes in the upper and lower ear plates, with the outer edge of the bolt contacting the hole wall. The two upper ear plates are symmetrical about the axis of the hydraulic cylinder, and the two lower ear plates are symmetrical about the axis of the metering pump.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. A double-plane positioning structure is constructed using an inverted U-shaped fixing plate, which, together with longitudinal elongated holes and bolts, and locking devices for the upper and lower ear plates, forms an adjustable installation platform. The connecting assembly employs a two-stage rotary adjustment mechanism of connecting blocks and rotating sleeves to achieve axial fine-tuning compensation for the hydraulic cylinder and metering pump. This composite adjustment system eliminates accumulated installation errors, ensures the concentricity of the hydraulic cylinder and metering pump, and significantly extends their lifespan compared to traditional fixed installation methods.

[0016] 2. The valve body is flexibly connected to the inlet and outlet manifolds using pressure-resistant hoses, and features a grooved positioning design to form an elastic buffer system. This structure absorbs the lateral impact force generated by hydraulic pulsations, avoids shaft misalignment caused by rigid connections, and effectively prevents piston wear.

[0017] 3. The blind hole design of the rotating sleeve and the locking mechanism of the clamping nut constitute a visual adjustment system. Operators can perform precise calibration with controllable torque by inserting a lever. With the mechanical locking of the upper and lower clamping nuts, connection and calibration can be completed in a short time, greatly improving calibration efficiency. Attached Figure Description

[0018] Figure 1 This is a front view of the present invention.

[0019] Figure 2 This is a top view of the fixed plate.

[0020] Figure 3 This is a cross-sectional view of the connecting components.

[0021] The components in the attached diagram are named as follows: 1. Base plate, 2. Hydraulic station, 3. Hydraulic valve assembly, 4. Hydraulic cylinder, 5. Metering pump, 6. Piston, 7. Connecting block, 8. Rotary sleeve, 9. Compression nut, 10. Blind hole, 11. Fixing plate, 12. Groove, 13. Elongated hole, 14. Lower ear plate, 15. Upper ear plate, 16. Bolt, 17. Nut, 18. Outlet manifold, 19. Inlet manifold, 20. Valve body. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1: Refer to Figures 1-3As shown, the hydraulic injection tool includes a base plate 1, a hydraulic station 2 fixed on the upper end of the base plate 1, and an outlet pipe 18 and an inlet pipe 19 fixed on the base plate 1 in front of the hydraulic station 2. The outlet pipe 18 and the inlet pipe 19 are horizontally arranged. One end of the outlet pipe 18 is blocked and the other end of the outlet pipe 18 is connected to the injection well. One end of the inlet pipe 19 is blocked and the other end of the inlet pipe 19 is connected to the injection tank.

[0024] Multiple injection units are installed horizontally on the front side of hydraulic station 2.

[0025] The injection unit includes a fixing plate 11 fixed to the front side of the hydraulic station 2. The fixing plate 11 is inverted U-shaped, and the two straight parts of the fixing plate 11 are arranged vertically.

[0026] The flat portion of the fixing plate 11 is provided with longitudinal grooves 12, and the flat portion of the fixing plate 11 on both the left and right sides of the grooves 12 is provided with longitudinal elongated holes 13.

[0027] A hydraulic cylinder 4 is installed at the upper end of the straight section above the fixed plate 11, and a metering pump 5 is installed at the upper end of the straight section below the fixed plate 11.

[0028] The metering pump 5 includes a pump barrel and a plunger 6 located inside the pump barrel.

[0029] A valve body 20 is connected to the lower end of the metering pump 5. The valve body 20 is located in the groove 12 below. The inlet and outlet of the valve body 20 are flexibly connected to the inlet manifold 19 and the outlet manifold 18, respectively. Specifically, the inlet and outlet of the valve body 20 are connected to the inlet manifold 19 and the outlet manifold 18, respectively, via pressure-resistant flexible hoses. An inlet check valve is installed in the inlet of the valve body 20, and an outlet check valve is installed in the outlet of the valve body 20.

[0030] Two symmetrical upper ear plates 15 are fixed to the lower end of the hydraulic cylinder 4. Two symmetrical lower ear plates 14 are fixed to the lower end of the metering pump 5. The upper ear plates 15 and lower ear plates 14 located on the same side are connected by bolts 16, which pass through an elongated hole 13 on one side.

[0031] The bolt 16 has two nuts 17 connected by threads. The lower nut 17 is tightly abutted against the lower end of the straight part below the fixing plate 11, and the lower end of the upper nut 17 is tightly abutted against the upper end of the lower ear plate 14.

[0032] The upper end of the plunger 6 of the metering pump 5 is connected to the lower end of the telescopic rod of the hydraulic cylinder 4 via a connecting assembly.

[0033] The telescopic rod of the hydraulic cylinder 4 is located in the groove 12 of the straight part above the fixed plate 11. The upper end of the hydraulic station 2 is fixed with a hydraulic valve group 3, which is connected to the hydraulic cylinder 4 and the hydraulic station 2 through an oil pipe.

[0034] The connecting assembly includes a connecting block 7 that is threadedly connected to the telescopic end of the telescopic rod of the hydraulic cylinder 4. The connecting block 7 is concentric with the hydraulic cylinder 4. A rotating sleeve 8 is rotatably connected to the lower end of the connecting block 7. The rotating sleeve 8 is threadedly connected to the upper end of the plunger 6 of the metering pump 5.

[0035] The telescopic rod of the hydraulic cylinder 4 and the plunger 6 are both threaded with clamping nuts 9. The two clamping nuts 9 are set one above the other. The upper clamping nut 9 is pressed against the upper end of the connecting block 7, and the lower clamping nut 9 is pressed against the lower end of the rotating sleeve 8.

[0036] When hydraulic station 2 is started, hydraulic valve group 3 causes the telescopic rods of multiple hydraulic cylinders 4 to reciprocate simultaneously. The telescopic rods of hydraulic cylinders 4 drive plunger 6 to reciprocate up and down. When plunger 6 moves upward, the inlet check valve opens and the outlet check valve closes, allowing the injection in the injection tank to enter metering pump 5 through inlet manifold 19 and valve body 20. When plunger 6 moves downward, the inlet check valve closes and the outlet check valve opens, allowing the injection in metering pump 5 to enter the injection well through outlet valve body 20 and outlet manifold 18.

[0037] When installing the hydraulic cylinder 4 and the metering pump 5, the hydraulic cylinder 4 is positioned at the upper end of the flat portion above the fixed plate 11, and the metering pump 5 is positioned at the upper end of the flat portion below the fixed plate 11, with the upper ear plate 15, lower ear plate 14, and elongated hole 13 corresponding. At this time, the valve body 20 is located in the lower groove 12, and the telescopic rod of the hydraulic cylinder 4 is located in the upper groove 12.

[0038] The bolt 16 is passed through the upper ear plate 15 on the same side and the elongated hole 13 above it. Then a nut 17 is threaded onto the lower part of the bolt 16, so that the lower end of the bolt 16 passes through the lower ear plate 14 on one side and the elongated hole 13 below it, and a nut 17 is installed at the lower end of the bolt 16.

[0039] Adjust the positions of hydraulic cylinder 4 and metering pump 5, and then rotate the rotating sleeve 8 so that the rotating sleeve 8 is threadedly connected to the upper end of the plunger 6. After the rotating sleeve 8 is threadedly connected to the upper end of the plunger 6, the hydraulic cylinder 4 and the metering pump 5 below it are concentric.

[0040] Rotate the two clamping nuts 9 so that the two clamping nuts 9 press tightly against the connecting block 7 and the rotating sleeve 8 respectively, and the connecting block 7 and the rotating sleeve 8 will be locked.

[0041] Then, the lower nut 17 is pressed tightly against the lower end of the flat portion below the fixing plate 11, and the upper nut 17 is rotated so that it presses tightly against the upper end of the lower ear plate 14. At this time, the hydraulic cylinder 4 is fixed on the flat portion above the fixing plate 11, and the metering pump 5 is fixed on the flat portion below the fixing plate 11. After the hydraulic cylinder 4 and the metering pump 5 are installed, their concentricity can be ensured, and uneven wear of the plunger 6 can be avoided during injection.

[0042] Since the inlet and outlet of the valve body 20 are connected to the inlet manifold 19 and the outlet manifold 18 respectively through pressure-resistant hoses, the connection between the valve body 20 and the inlet manifold 19 and the outlet manifold 18 will not affect the concentricity of the metering pump 5 and the hydraulic cylinder 4.

[0043] Multiple blind holes 10 are evenly distributed around the outer circumference of the rotating sleeve 8, and the axis of the blind holes 10 is perpendicular to the axis of the rotating sleeve 8.

[0044] When rotating the sleeve 8, insert the lever into the blind hole 10 to stabilize the plunger 6, and rotate the sleeve 8 to facilitate the rotation of the sleeve 8 to connect it with the plunger 6.

[0045] Example 2: Based on Example 1, bolt 16 passes through the holes in the upper ear plate 15 and the lower ear plate 14, with the outer edge of bolt 16 contacting the hole wall. The two upper ear plates 15 are symmetrical about the axis of the hydraulic cylinder 4, and the two lower ear plates 14 are symmetrical about the axis of the metering pump 5.

[0046] Since the outer edge of bolt 16 contacts the hole wall, after bolt 16 passes through the upper ear plate 15 and the lower ear plate 14, the hydraulic cylinder 4 and the metering pump 5 below it will be concentric, which facilitates the threaded connection between the rotating sleeve 8 and the upper end of the plunger 6.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Hydraulic agent injection tool comprising a base plate (1) on the upper end of which a hydraulic station (2) is fixed, characterized in that, The bottom plate (1) on the front side of the hydraulic station (2) is fixed with an outflow pipe (18) and an inflow pipe (19), and a plurality of injection units are installed horizontally on the front side of the hydraulic station (2); the injection unit comprises a fixed plate (11) fixed on the front side of the hydraulic station (2), the fixed plate (11) is inverted U-shaped, the two flat parts of the fixed plate (11) are arranged up and down, longitudinal grooves (12) are formed on the flat parts of the fixed plate (11), longitudinal long holes (13) are formed on the flat parts of the fixed plate (11) on the left and right sides of the grooves (12), a hydraulic cylinder (4) is arranged on the upper end of the flat part of the fixed plate (11), a metering pump (5) is arranged on the lower end of the flat part of the fixed plate (11), the metering pump (5) comprises a pump cylinder and a plunger (6) located in the pump cylinder, a valve body (20) is communicated with the lower end of the metering pump (5), the valve body (20) is located in the lower groove (12), the inlet and outlet of the valve body (20) are flexibly communicated with the inflow pipe (19) and the outflow pipe (18) respectively, two upper ear plates (15) symmetrical to each other are fixed on the lower end of the hydraulic cylinder (4), two lower ear plates (14) symmetrical to each other are fixed on the lower end of the metering pump (5), the upper ear plate (15) and the lower ear plate (14) on the same side are connected through a bolt (16), the bolt (16) penetrates the long hole (13) on one side thereof, two nuts (17) are threadedly connected on the bolt (16), the lower nut (17) abuts against the lower end of the lower flat part of the fixed plate (11), the upper nut (17) abuts against the upper end of the lower ear plate (14), the upper end of the plunger (6) of the metering pump (5) is connected with the lower end of the telescopic rod of the hydraulic cylinder (4) through a connecting assembly, the telescopic rod of the hydraulic cylinder (4) is located in the groove (12) on the upper flat part of the fixed plate (11), a hydraulic valve group (3) is fixed on the upper end of the hydraulic station (2), the hydraulic valve group (3) is communicated with the hydraulic cylinder (4) and the hydraulic station (2) through an oil pipe.

2. The hydraulic agent injection tool of claim 1, wherein, The outflow pipe (18) and the inflow pipe (19) are horizontally arranged, one end of the outflow pipe (18) is blocked, the other end of the outflow pipe (18) is communicated with an injection well, one end of the inflow pipe (19) is blocked, the other end of the inflow pipe (19) is communicated with an injection tank.

3. The hydraulic agent injection tool of claim 1, wherein, The inlet and outlet of the valve body (20) are communicated with the inflow pipe (19) and the outflow pipe (18) through pressure-resistant hoses respectively, a liquid inlet one-way valve is arranged in the inlet of the valve body (20), a liquid outlet one-way valve is arranged in the outlet of the valve body (20).

4. The hydraulic agent injection tool of claim 1, wherein, The connecting assembly comprises a connecting block (7) threadedly connected with the telescopic end of the telescopic rod of the hydraulic cylinder (4), the connecting block (7) is concentric with the hydraulic cylinder (4), a rotating sleeve (8) is concentrically and rotatably connected with the lower end of the connecting block (7), the rotating sleeve (8) is threadedly connected with the upper end of the plunger (6) of the metering pump (5).

5. The hydraulic agent injection tool of claim 4, wherein, A plurality of blind holes (10) are uniformly arranged on the outer periphery of the rotating sleeve (8), the axes of the blind holes (10) are perpendicular to the axis of the rotating sleeve (8).

6. The hydraulic agent injection tool of claim 1, wherein, The telescopic rod and the plunger (6) of the hydraulic cylinder (4) are both screwed with pressing nuts (9), the two pressing nuts (9) are arranged in upper and lower positions, the upper pressing nut (9) is tightly abutted against the upper end of the connecting block (7), and the lower pressing nut (9) is tightly abutted against the lower end of the rotating sleeve (8).

7. The hydraulic agent injection tool of claim 1, wherein, The bolt (16) penetrates the perforations of the upper ear plates (15) and the lower ear plates (14), the outer edge of the bolt (16) is in contact with the hole wall of the perforation, the two upper ear plates (15) are symmetrical according to the axis of the hydraulic cylinder (4), and the two lower ear plates (14) are symmetrical according to the axis of the metering pump (5).

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