Intelligent injection device for oil-gas-water fracturing tracer agent

Abstract

The utility model relates to an intelligent injection device for an oil-gas-water fracturing tracer agent. The intelligent injection device comprises a frame, wheels, an injection mechanism, a driving mechanism and a control box, the driving mechanism and the control box are both mounted on the frame, the driving mechanism is used for driving the injection mechanism, and the control box is used for adjusting and controlling the driving mechanism and the injection mechanism; the wheels are mounted at the bottom of the frame; the injection mechanism is mounted on the frame and connected with the driving mechanism, and the injection mechanism is used for injecting a tracer agent. In the tracer injection process, if injection is blocked, the device can store force to reduce the load of the driving mechanism, meanwhile, after the blocking is broken through, the stability of the tracer injection rate can be controlled, the tracer is prevented from splashing and being wasted, and the injection effect is improved.

Description

Technical Field

[0001] The utility model belongs to the field of oil and gas development, and particularly relates to an intelligent injection device for oil and gas hydraulic fracturing tracers. Background Technique

[0002] In the field of oil extraction, fracturing technology, especially hydraulic fracturing, is a key technical means to artificially create fractures in oil and gas reservoirs through high-pressure hydraulic action to optimize the oil and gas flow path and increase the oil well production. This process aims to improve the bottom-hole flow conditions, effectively alleviate the interlayer contradiction, and significantly improve the oil layer utilization efficiency. With the extension of the oil well production cycle, in the face of the challenges of declining production capacity and decreasing permeability, fracturing technology has emerged as an important strategy to enhance the oil well oil drainage capacity and restore and increase production.

[0003] Fracturing technology is mainly divided into two categories: hydraulic fracturing and high-energy gas fracturing. Among them, hydraulic fracturing technology has become the industry's first choice due to its high efficiency and wide application. This technology uses a ground high-pressure pump unit to quickly inject high-pressure fluid into the wellbore, and uses the high-pressure energy accumulated at the bottom of the well to cause the oil layer rock to break and form a fracture network. To prevent the fractures from closing again after the pump pressure is released, technicians will mix a high-density proppant (such as sand) into the injected fluid. These proppants enter the fractures with the fluid and stay permanently, effectively supporting the fractures to remain open, thereby long-term improving the oil flow channel and significantly enhancing the production increase effect of the oil well. Especially for oil layers with low permeability, its production increase potential is particularly significant.

[0004] Chinese invention patent CN215369820U discloses a tracer injection device synchronized with fracturing, including: a fixed base, the left side of the top of the fixed base is fixedly connected with a tracer container, the right side of the top of the tracer container is fixedly connected to one end of a second pipeline, the other end of the second pipeline is fixedly connected to the rear part of the top of a rotor pump, the front part of the right end of the rotor pump is fixedly connected to one end of a connecting pipe, the other end of the connecting pipe is fixedly connected to the middle part of the left end of a flow velocity sensor, and the middle part of the right end of the flow velocity sensor is fixedly connected to one end of a third pipeline. In the utility model, first, the rotor pump can pump the tracer into the tracer container, the flow velocity sensor can monitor the tracer discharge speed, the flow sensor can real-time monitor the amount of tracer passing through the third pipeline, and the controller can control the working state of the device, which is very convenient to use. However, it has the following disadvantages:

[0005] 1. When the tracer is blocked by the soil layer during the tracer injection process, the tracer is blocked and cannot flow, resulting in an excessive load on the rotor pump and easily causing damage to the rotor pump;

[0006] 2. When the tracer injection is blocked and the fractured soil layer is instantaneously fractured, it is easy to cause the tracer to jet, resulting in local waste of the tracer and unable to ensure good injection effect.

[0007] Therefore, it is necessary to provide an intelligent injection device for oil and gas hydraulic fracturing tracers to solve the problems raised in the above background technology. Utility Model Content

[0008] To achieve the above object, the present utility model provides the following technical solution: An intelligent injection device for oil and gas hydraulic fracturing tracers, comprising: a vehicle frame, wheels, an injection mechanism, a driving mechanism, and a control box;

[0009] The driving mechanism and the control box are both installed on the vehicle frame. The driving mechanism is used to drive the injection mechanism, and the control box is used to adjust and control the driving mechanism and the injection mechanism;

[0010] The wheels are installed at the bottom of the vehicle frame;

[0011] The injection mechanism is installed on the vehicle frame and is connected to the driving mechanism. The injection mechanism is used to inject tracers.

[0012] As a further improvement of the present utility model, the injection mechanism includes:

[0013] An adjustment cylinder, one end of which is fixed to the vehicle frame, and the other end is fixed with an injection cylinder. A control component is provided at the connection between the adjustment cylinder and the injection cylinder;

[0014] A cylinder body, coaxially fixed inside the adjustment cylinder, and a piston is slidably arranged inside the cylinder body;

[0015] An adjustment component, arranged inside the cylinder body, one end of which is fixed to the piston, and the other end is connected to a knob; the knob is rotatably arranged on the adjustment cylinder;

[0016] An air guiding valve, fixed to the top of the adjustment cylinder;

[0017] A liquid inlet, one end of which is connected to the injection cylinder, and the other end is connected to the driving mechanism;

[0018] A diversion port, one end of which is connected to the adjustment cylinder, and the other end is connected to a liquid storage bin;

[0019] A liquid outlet, fixed to the end of the injection cylinder.

[0020] As a further improvement of the present utility model, the adjustment component includes: a fixed frame, a lead screw, an adjustment spring, a damping rod, and an adjustment nut;

[0021] The fixing bracket is fixed inside the adjusting cylinder; the lead screw is rotatably arranged on the fixing bracket, one end is connected to the damping rod, and the other end is coaxially fixed to the knob; the adjusting nut is threadedly connected to the lead screw, and the adjusting nut is also slidably arranged on the fixing bracket;

[0022] One end of the damping rod is connected to the lead screw, and the other end is connected to the piston; the adjusting spring is sleeved on the damping rod.

[0023] As a further improvement of the present invention, the control assembly includes: a sealing ring and an adjusting seat;

[0024] The sealing ring is arranged at the connection between the adjusting cylinder and the injection cylinder; the sealing ring is provided with a sliding hole; the adjusting seat is slidably arranged in the sliding hole.

[0025] As a further improvement of the present invention, the adjusting seat includes:

[0026] A sliding rod, which is slidably arranged in the sliding hole; an upper top seat is arranged at one end of the sliding rod, and a lower top seat is arranged at the other end;

[0027] A sealing plate, which is arranged on the upper top seat.

[0028] As a further improvement of the present invention, a liquid guiding groove is opened on the sliding rod.

[0029] As a further improvement of the present invention, liquid guiding holes are opened on the upper top seat and the lower top seat.

[0030] As a further improvement of the present invention, the driving mechanism includes: a motor and an injection pump;

[0031] The liquid inlet end of the injection pump is communicated with the liquid storage bin, and the liquid outlet end is communicated with the liquid inlet; the motor is fixed on the vehicle frame and is used to drive the injection pump.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. When the injection of the tracer is blocked and the soil layer needs to be fractured, the injection mechanism stores energy for fracturing under the action of the driving mechanism. When the stored energy pressure reaches the soil layer fracturing condition, the tracer breaks through the soil layer and continues to complete the fracturing work; after breaking through the soil layer, the injection mechanism controls the stability of the tracer injection rate to prevent the tracer from splashing, thus causing waste of the tracer and improving the injection effect of the tracer;

[0034] 2. During the process of storing energy for the soil layer to rupture, the load of the driving mechanism is reduced to avoid damage to the driving mechanism caused by overload. Description of the Drawings

[0035] Figure 1 Overall schematic of an intelligent injection device for oil and gas hydraulic fracturing tracers Figure I ;

[0036] Figure 2 Overall schematic of an intelligent injection device for oil and gas hydraulic fracturing tracers Figure II ;

[0037] Figure 3 Schematic diagram of the injection mechanism of an intelligent injection device for oil and gas hydraulic fracturing tracers;

[0038] Figure 4 Schematic diagram of the adjustment component of an intelligent injection device for oil and gas hydraulic fracturing tracers;

[0039] Figure 5 Schematic diagram of the control component structure of an intelligent injection device for oil and gas hydraulic fracturing tracers;

[0040] Figure 6 Schematic diagram of the fracturing state of the control component of an intelligent injection device for oil and gas hydraulic fracturing tracers;

[0041] Figure 7 Schematic diagram of the injection state of the control component of an intelligent injection device for oil and gas hydraulic fracturing tracers;

[0042] Figure 8 Schematic diagram of the adjustment seat of an intelligent injection device for oil and gas hydraulic fracturing tracers.

[0043] Among them, 1, frame; 2, wheels; 3, injection mechanism; 31, adjustment cylinder; 32, injection cylinder; 33, cylinder block; 35, piston; 36, knob; 37, air guide valve; 38, diversion port; 39, liquid inlet; 310, liquid outlet; 4, drive mechanism; 5, control box; 41, motor; 42, injection pump; 6, adjustment component; 61, fixed frame; 63, lead screw; 64, adjustment spring; 65, damping rod; 66, adjustment nut; 71, sealing ring; 72, adjustment seat; 721, sliding rod; 722, upper top seat; 723, lower top seat; 724, sealing plate. Specific implementation method

[0044] Refer to Figures 1 to 8 As shown, an intelligent injection device for oil and gas hydraulic fracturing tracers, characterized in that it includes: a frame 1, wheels 2, an injection mechanism 3, a drive mechanism 4, and a control box 5;

[0045] The drive mechanism 4 and the control box 5 are both installed on the frame 1, the drive mechanism 4 is used to drive the injection mechanism 3, and the control box 5 is used to adjust and control the drive mechanism 4 and the injection mechanism 3;

[0046] The wheels 2 are installed at the bottom of the frame 1;

[0047] The injection mechanism 3 is installed on the vehicle frame 1 and is connected to the drive mechanism 4. The injection mechanism 3 is used for injecting a tracer agent.

[0048] Push the vehicle frame 1 moving device to the working location, and adjust the relevant parameters of the injection mechanism 3 through the control box 5, such as: tracer agent injection pressure, flow rate, etc.

[0049] After completing the adjustment of the relevant parameters, start the drive mechanism 4 to make the tracer agent enter the injection mechanism 3, and perform intelligent injection of the tracer agent under the adjustment of the injection mechanism 3.

[0050] When the tracer agent is blocked during the injection process and the soil layer needs to be fractured, the injection mechanism 3 stores energy for fracturing under the action of the drive mechanism 4. When the stored energy pressure reaches the soil layer fracturing condition, the tracer agent breaks through the soil layer to continue and complete the fracturing work; after breaking through the soil layer, the injection mechanism 3 controls the stability of the tracer agent injection rate, prevents the tracer agent from splashing, thereby causing waste of the tracer agent, and improves the injection effect of the tracer agent.

[0051] As a preferred embodiment, the injection mechanism 3 includes:

[0052] An adjustment cylinder 31, one end of which is fixed on the vehicle frame 1, and the other end is fixed with an injection cylinder 32. A control component is arranged at the connection between the adjustment cylinder 31 and the injection cylinder 32;

[0053] A cylinder block 33 is coaxially fixed in the adjustment cylinder 31, and a piston 35 is slidably arranged in the cylinder block 33;

[0054] An adjustment component 6 is arranged in the cylinder block 33, one end of which is fixed to the piston 35, and the other end is connected to a knob 36; the knob 36 is rotatably arranged on the adjustment cylinder 31;

[0055] An air guide valve 37 is fixed on the top of the adjustment cylinder 31;

[0056] A liquid inlet 39, one end of which is connected to the injection cylinder 32, and the other end is connected to the drive mechanism 4;

[0057] A diversion port 38, one end of which is connected to the adjustment cylinder 31, and the other end is connected to a liquid storage bin;

[0058] A liquid outlet 310 is fixed at the end of the injection cylinder 32 and is connected to a fracturing injection pipe.

[0059] It should be noted that by rotating the knob 36 to drive the adjustment component 6 to control the magnitude of the stored energy pressure, the soil layer fracture pressure is accurately controlled, and the fracture effect of the soil layer that hinders the injection of the tracer agent is improved.

[0060] During normal injection of the tracer, the driving mechanism 4 causes the tracer to enter the syringe barrel 32 through the liquid inlet 39 and finally complete the injection of the tracer under the action of the fracturing injection pipe through the liquid outlet 310.

[0061] When the tracer is blocked by the soil layer during the injection process, continuous pumping of the tracer by the driving mechanism 4 will increase the internal pressure in the syringe barrel 32. The increase in internal pressure will push the control assembly to slide, causing the piston 35 to slide upward in the cylinder block 33. During the upward sliding process of the piston 35, energy storage will be completed through the adjusting assembly 6. When the energy storage of the adjusting assembly 6 reaches the level to fracture the blocking soil layer, the tracer breaks through the soil layer obstruction and continues to complete the injection operation; at the moment when the tracer breaks through the soil layer obstruction, the control assembly slides downward, making the diversion port 38 conduct, and at the same time closing the adjusting cylinder 31 and the syringe barrel 32, that is, even if the tracer in the adjusting cylinder 31 flows into the liquid storage bin through the diversion port 38 under the action of the adjusting assembly 6, so as to maintain the stability of the injection pressure of the tracer in the syringe barrel 32, avoid splashing, and improve the distribution effect in the soil layer.

[0062] During the energy storage process of soil layer fracture, the load of the driving mechanism 4 is also reduced to avoid damage to the driving mechanism 4 caused by overload.

[0063] As a preferred embodiment, the adjusting assembly 6 includes: a fixing frame 61, a lead screw 63, an adjusting spring 64, a damping rod 65, and an adjusting nut 66;

[0064] The fixing frame 61 is fixed in the adjusting cylinder 31; the lead screw 63 is rotatably arranged on the fixing frame 61, one end is connected to the damping rod 65, and the other end is coaxially fixed to the knob 36; the adjusting nut 66 is threadedly connected to the lead screw 63, and the adjusting nut 66 is also slidably arranged on the fixing frame 61;

[0065] One end of the damping rod 65 is connected to the lead screw 63, and the other end is connected to the piston 35; the adjusting spring 64 is sleeved on the damping rod 65.

[0066] It should be noted that turning the knob 36 causes the lead screw 63 to rotate, thereby moving the adjusting nut 66. When the adjusting nut 66 moves, the elastic potential energy of the adjusting spring 64 is adjusted, that is, the magnitude of the energy storage pressure is adjusted.

[0067] The damping rod 65 can effectively prevent the piston 35 from sliding significantly at the moment of soil layer fracture, thereby preventing the tracer in the adjusting cylinder 31 from instantly entering the syringe barrel 32 and causing splashing of the tracer.

[0068] As a preferred embodiment, the control assembly includes: a sealing ring 71 and an adjusting seat 72;

[0069] The sealing ring 71 is arranged at the connection between the adjusting cylinder 31 and the injection cylinder 32; a sliding hole is formed in the sealing ring 71; and an adjusting seat 72 is slidably arranged in the sliding hole.

[0070] As a preferred embodiment, a liquid guide groove is formed in the sliding rod 721.

[0071] As a preferred embodiment, liquid guide holes are formed in the upper top seat 722 and the lower top seat 723.

[0072] It should be noted that during normal injection of the tracer, the piston 35 makes the sealing ring 71 contact and seal with the upper top seat 722 under the action of the adjusting spring 64, thereby preventing the tracer from flowing into the adjusting cylinder 31.

[0073] When the injection of the tracer is blocked, the tracer pushes the piston 35 to slide upward through the liquid guide holes and the liquid guide groove, so that the adjusting spring 64 is compressed and stores energy; when the upper top seat 722 reaches the maximum sliding limit, the sealing plate 724 completes the blocking of the diversion port 38, preventing the tracer from flowing out through the diversion port 38 during the energy storage process and avoiding the failure of energy storage.

[0074] When the tracer breaks through the soil layer obstruction, the upper top seat 722 forms contact sealing with the sealing ring 71 under pressure, and at the same time makes the diversion port 38 conductive, so that the tracer in the cylinder body 33 flows into the liquid storage bin through the diversion port 38 under the action of the adjusting spring 64.

[0075] As a preferred embodiment, the driving mechanism 4 includes: a motor 41 and an injection pump 42;

[0076] The liquid inlet end of the injection pump 42 is communicated with the liquid storage bin, and the liquid outlet end is communicated with the liquid inlet 39; the motor 41 is fixed on the vehicle frame 1 and is used to drive the injection pump 42.

[0077] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An intelligent injection device for oil and gas hydraulic fracturing tracers, characterized in that: Comprising: a frame (1), wheels (2), an injection mechanism (3), a driving mechanism (4), and a control box (5); the driving mechanism (4) and the control box (5) are both installed on the frame (1), the driving mechanism (4) is used to drive the injection mechanism (3), and the control box (5) is used to adjust and control the driving mechanism (4) and the injection mechanism (3); the wheels (2) are installed at the bottom of the frame (1); the injection mechanism (3) is installed on the frame (1) and is connected to the driving mechanism (4), and the injection mechanism (3) is used to inject a tracer.

2. The intelligent injection device for oil and gas hydraulic fracturing tracer according to claim 1, characterized in that: The injection mechanism (3) includes: an adjustment cylinder (31) with one end fixed to the frame (1) and the other end fixed with an injection cylinder (32), and a control component is provided at the connection between the adjustment cylinder (31) and the injection cylinder (32); a cylinder block (33) coaxially fixed inside the adjustment cylinder (31), and a piston (35) is slidably arranged inside the cylinder block (33); an adjustment component (6) provided inside the cylinder block (33), with one end fixed to the piston (35) and the other end connected to a knob (36); the knob (36) is rotatably arranged on the adjustment cylinder (31); a gas guide valve (37) fixed to the top of the adjustment cylinder (31); a liquid inlet (39) with one end connected to the injection cylinder (32) and the other end connected to the driving mechanism (4); a diversion port (38) with one end connected to the adjustment cylinder (31) and the other end connected to a liquid storage bin; a liquid outlet (310) fixed to the end of the injection cylinder (32).

3. The intelligent injection device for oil and gas hydraulic fracturing tracer according to claim 2, wherein: The adjustment component (6) includes: a fixing frame (61), a lead screw (63), an adjustment spring (64), a damping rod (65), and an adjustment nut (66); the fixing frame (61) is fixed inside the adjustment cylinder (31); the lead screw (63) is rotatably arranged on the fixing frame (61), with one end connected to the damping rod (65) and the other end coaxially fixed to the knob (36); the adjustment nut (66) is threadedly connected to the lead screw (63), and the adjustment nut (66) is also slidably arranged on the fixing frame (61); one end of the damping rod (65) is connected to the lead screw (63) and the other end is connected to the piston (35); the adjustment spring (64) is sleeved on the damping rod (65).

4. An intelligent injection device for oil and gas hydraulic fracturing tracers according to claim 3, characterized in that: The control component includes: a sealing ring (71) and an adjustment seat (72); the sealing ring (71) is arranged at the connection between the adjustment cylinder (31) and the injection cylinder (32); the sealing ring (71) is provided with a sliding hole; and the adjustment seat (72) is slidably arranged in the sliding hole.

5. The intelligent injection device for oil and gas hydraulic fracturing tracer according to claim 4, characterized in that: The adjustment seat (72) includes: a sliding rod (721) slidably arranged in the sliding hole; a top seat (722) is provided at one end of the sliding rod (721), and a bottom seat (723) is provided at the other end; a sealing plate (724) arranged on the top seat (722).

6. The intelligent injection device for oil and gas hydraulic fracturing tracer according to claim 5, characterized in that: A liquid guide groove is provided on the sliding rod (721).

7. An intelligent injection device for oil and gas hydraulic fracturing tracers according to claim 5, characterized in that: Liquid guiding holes are formed in the upper top seat (722) and the lower top seat (723).

8. An intelligent injection device for oil and gas hydraulic fracturing tracers according to claim 2, characterized in that: The driving mechanism (4) includes: a motor (41) and an injection pump (42); The liquid inlet end of the injection pump (42) communicates with the liquid storage bin, and the liquid outlet end communicates with the liquid inlet (39); the motor (41) is fixed on the vehicle frame (1) and is used to drive the injection pump (42).

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