Intermediate storage device for simulating oil
By using a piston float and a gas relief piece to isolate gas disturbances in core flooding experiments and the conical part to break up bubbles, the fluid instability problem of the intermediate storage device during start-up and shutdown was solved, and stable fluid supply and high-precision permeability measurement in core experiments were achieved.
Patent Information
- Application Number
- CN202521659793.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-06
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2035-08-06
AI Technical Summary
In existing core flooding experiments, the fluid in the intermediate storage device is prone to shaking during startup and shutdown or pressure fluctuations, resulting in unstable flow and pressure, affecting the accuracy and repeatability of experimental data. In addition, bubbles are easily entrained during fluid injection, affecting permeability measurements.
An intermediate storage device for simulated oil is designed. It uses a piston float to divide the chamber into a drive chamber and a fluid chamber. Combined with a liquid guide and a gas relief part, the piston float rises and falls with the liquid level to isolate gas disturbances, the cone part breaks up bubbles, and an elastic telescopic tube and spring provide continuous pressure to maintain the seal.
It significantly reduces fluid fluctuations and ensures a smooth oil flow to the core, improving the precision of permeability measurements and the accuracy and repeatability of experimental data.
Smart Images
Figure CN223328257U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oilfield experimental equipment, in particular to an intermediate storage device for simulated oil. Background Art
[0002] The purpose of a core flooding experiment is to pass liquid through the core at a certain flow rate. By measuring the pressure difference between the inlet and outlet of the core and the liquid flow rate through the core, combined with other parameters, the core liquid permeability is calculated according to Darcy's law. By calculating the permeability of media such as water, oil, and displacement fluid in the core, the sensitivity of the formation can be evaluated. This is used to study drilling, water injection, well repair operations, and how to avoid or reduce damage to the formation by foreign substances.
[0003] In a core flooding experiment system, an intermediate storage device is used to temporarily store and stably supply experimental fluid (such as simulated oil) to the core holder. Existing intermediate storage containers are usually simple cylindrical structures. However, such containers have obvious shortcomings:
[0004] 1. When the experimental system is started and stopped or the pressure fluctuates, the fluid in the container is prone to sloshing and the liquid level fluctuates, resulting in unstable flow and pressure of the core supply, affecting the accuracy and repeatability of the experimental data;
[0005] 2. Bubbles are easily entrained during fluid injection, and bubbles entering the core will seriously affect the accuracy of permeability measurement.
[0006] Therefore, it is necessary to provide a new intermediate storage device for simulated oil to solve the above technical problems. Utility Model Content
[0007] In order to solve the above technical problems, the utility model provides an intermediate storage device for simulated oil.
[0008] The intermediate storage device for simulated oil provided by the utility model comprises an intermediate storage cylinder, wherein a piston disc is installed in the intermediate storage cylinder, and the intermediate storage cylinder is divided into a driving chamber and a fluid chamber distributed in an upper and lower direction by the piston disc;
[0009] A piston float is installed in the driving chamber and is slidably connected to the intermediate storage cylinder. A liquid guide for inputting oil and an air discharge member for exhausting air are installed on the piston float.
[0010] The bottom of the piston floating plate is fixedly embedded with a plurality of evenly distributed conical parts;
[0011] A liquid discharge valve is fixedly installed on the side wall of the intermediate storage cylinder, and a liquid inlet valve communicating with the fluid chamber is fixedly installed on the bottom of the intermediate storage cylinder.
[0012] Preferably, the liquid-guiding part includes a connecting A tube, which is fixedly embedded on the piston float and communicated with the driving chamber at the bottom of the piston float, and an elastic telescopic A tube is fixedly installed on the connecting A tube, and a quick A connector is fixedly installed on the top of the elastic telescopic A tube, and the quick A connector is installed in the drainage hole opened at the top of the intermediate storage cylinder.
[0013] Preferably, the air-deflation part includes a connecting B tube, which is fixedly embedded in the piston float and communicated with the driving chamber at the bottom of the piston float, and an elastic telescopic B tube is fixedly installed on the connecting B tube, and a quick B connector is fixedly installed on the top of the elastic telescopic B tube, and the quick B connector is installed in the exhaust hole opened at the top of the intermediate storage cylinder.
[0014] Preferably, a solenoid valve is fixedly installed on the connection B pipe.
[0015] Preferably, the degassing member further includes a spring, which is located in the elastic telescopic B tube, one end of the spring is fixedly connected to the inner top wall of the exhaust hole, and the other end of the spring is fixedly connected to the upper surface of the piston floating plate.
[0016] Preferably, a spacer ring is fixedly installed in the intermediate storage cylinder, and the piston disc is located above the spacer ring.
[0017] Preferably, a supporting foot is fixedly installed on the bottom of the intermediate storage cylinder.
[0018] Compared with related technologies, the intermediate storage device for simulated oil provided by the present invention has the following beneficial effects:
[0019] The piston float provided in the utility model can rise and fall freely in the driving chamber with the liquid level of the injected oil and fit closely to the liquid surface. This layer of physical isolation effectively isolates the influence of the upper gas disturbance and the shaking of the container on the oil below, significantly reduces the hidden dangers of oil fluctuation and volatility, and ensures that an extremely stable oil flow is provided to the core. The spring in the air vent is arranged in the elastic telescopic B tube, which not only enables the elastic telescopic B tube to freely extend and retract with the rise and fall of the piston float, but more importantly, the spring provides continuous downward pressure to ensure that the piston float is always in close contact with the oil surface, maintaining a good sealing and stability effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic structural diagram of a preferred embodiment of the intermediate storage device for simulated oil provided by the utility model;
[0021] Figure 2 for Figure 1 A schematic cross-sectional structural diagram of the intermediate storage cylinder shown;
[0022] Figure 3 for Figure 1 The cross-sectional structural diagram of the piston floating plate is shown;
[0023] Figure 4 for Figure 3 Schematic diagram of the structure of the bottom of the piston floating plate.
[0024] Numbers in the figure: 1. Intermediate storage cylinder; 1a. Drive chamber; 1b. Fluid chamber; 1c. Drain hole; 1d. Exhaust hole; 11. Spacer ring; 12. Support foot; 2. Piston disc; 3. Piston float; 4. Liquid guide; 41. Connecting tube A; 42. Elastic and telescopic tube A; 43. Quick connector A; 5. Air release part; 51. Connecting tube B; 52. Elastic and telescopic tube B; 53. Quick connector B; 54. Spring; 55. Solenoid valve; 6. Drain valve; 7. Inlet valve; 8. Conical part. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0026] The specific implementation of the present invention is described in detail below with reference to specific embodiments.
[0027] See also Figures 1 to 4 An embodiment of the present invention provides an intermediate storage device for simulated oil, which includes an intermediate storage cylinder 1, a piston disk 2 and a piston floating disk 3.
[0028] In the embodiments of the present invention, please refer to Figures 1 to 4 A piston disc 2 is installed in the intermediate storage cylinder 1, which divides the intermediate storage cylinder 1 into a drive chamber 1a and a fluid chamber 1b distributed upper and lower by the piston disc 2. A spacer ring 11 is fixedly installed in the intermediate storage cylinder 1, and the piston disc 2 is located above the spacer ring 11. A piston float 3 is installed in the drive chamber 1a, which is slidably connected to the intermediate storage cylinder 1, and a liquid guide part 4 for inputting oil and an air vent 5 for exhausting are installed on the piston float 3. A drain valve 6 is fixedly installed on the side wall of the intermediate storage cylinder 1, and a liquid inlet valve 7 connected to the fluid chamber 1b is fixedly installed at the bottom of the intermediate storage cylinder 1.
[0029] It should be noted that the oil used for experimental simulation is injected between the piston disc 2 and the piston float 3 through the liquid guide 4, so that the piston float 3 rises and floats along the oil surface, and the provided piston float 3 can freely rise and fall in the driving chamber 1a along with the liquid level of the injected oil and fits tightly to the liquid surface. This layer of physical isolation effectively isolates the influence of upper gas disturbance and container shaking on the oil below, significantly reduces the hidden dangers of oil fluctuation and volatility, and ensures that an extremely stable oil flow is provided to the core.
[0030] Among them, a number of evenly distributed conical parts 8 are fixedly embedded at the bottom of the piston float 3. When the oil is injected, it will generate vortexes or change the flow direction when flowing through the conical parts 8, which helps to break and aggregate the bubbles carried in the oil and improve the permeability measurement accuracy.
[0031] Furthermore, a support foot 12 is fixedly installed on the bottom of the intermediate storage tube 1 , thereby improving the stability of the intermediate storage tube 1 .
[0032] In the embodiments of the present invention, please refer to Figures 1 to 4 The liquid guide member 4 includes a connecting tube A 41, which is fixedly fitted on the piston float 3 and communicates with the driving chamber 1a at the bottom of the piston float 3. An elastic telescopic tube A 42 is fixedly mounted on the connecting tube A 41, and a quick A connector 43 is fixedly mounted on the top of the elastic telescopic tube A 42. The quick A connector 43 is installed in the drainage hole 1c opened at the top of the intermediate storage cylinder 1.
[0033] The air-deflating part 5 includes a connecting B tube 51, which is fixedly embedded in the piston float 3 and communicated with the driving chamber 1a at the bottom of the piston float 3, and an elastic telescopic B tube 52 is fixedly installed on the connecting B tube 51, and a quick B connector 53 is fixedly installed on the top of the elastic telescopic B tube 52, and the quick B connector 53 is installed in the exhaust hole 1d opened at the top of the intermediate storage tube 1. The air-deflating part 5 also includes a spring 54, which is located in the elastic telescopic B tube 52, one end of the spring 54 is fixedly connected to the inner top wall of the exhaust hole 1d, and the other end of the spring 54 is fixedly connected to the upper surface of the piston float 3, and an electromagnetic valve 55 is fixedly installed on the connecting B tube 51. The solenoid valve 55 is arranged so that the exhaust process can be automatically controlled, thereby improving the experimental efficiency.
[0034] It should be noted that: when the piston float 3 rises and floats along the oil surface, the elastic telescopic tube A 42 and the elastic telescopic tube B 52 are compressed, and the spring 54 in the air-deflating component 5 is arranged in the elastic telescopic tube B 52, with one end fixed to the top of the exhaust hole 1d and the other end connected to the piston float 3. Not only can the elastic telescopic tube B 52 be freely extended and retracted as the piston float 3 rises and falls, but more importantly, the spring 54 provides continuous downward pressure to ensure that the piston float 3 is always close to the oil surface, maintaining a good sealing and stability effect.
[0035] The working principle of the intermediate storage device for simulated oil provided by the utility model is as follows:
[0036] The oil used for experimental simulation is injected between the piston disc 2 and the piston float 3 through the liquid guide 4, so that the piston float 3 rises and floats along the oil surface, and the piston float 3 can freely rise and fall in the driving chamber 1a along with the liquid level of the injected oil and is tightly attached to the liquid surface. This physical isolation effectively isolates the influence of the upper gas disturbance and the shaking of the container on the oil below, significantly reduces the hidden dangers of oil fluctuation and wave, and ensures that an extremely stable oil flow is provided to the core. When the piston float 3 rises and floats along the oil surface, the elastic telescopic tube A 42 and the elastic telescopic tube B 52 are compressed, and the spring 54 in the air release member 5 is arranged in the elastic telescopic tube B 52, one end of which is fixed to the top of the exhaust hole 1d and the other end is connected to the piston float 3. Not only can the elastic telescopic tube B 52 be freely extended and retracted along with the rise and fall of the piston float 3, but more importantly, the spring 54 provides continuous downward pressure to ensure that the piston float 3 is always in close contact with the oil surface, maintaining a good sealing and stability effect.
[0037] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.
[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. An intermediate storage device for simulated oil, characterized in that: It comprises an intermediate storage cylinder (1), wherein a piston disc (2) is installed in the intermediate storage cylinder (1), and the intermediate storage cylinder (1) is divided into a drive chamber (1a) and a fluid chamber (1b) distributed in an upper and lower direction by the piston disc (2); A piston float (3) slidably connected to the intermediate storage cylinder (1) is installed in the driving chamber (1a), and a liquid guide (4) for inputting oil and an air discharge member (5) for exhausting air are installed on the piston float (3); The bottom of the piston floating plate (3) is fixedly embedded with a plurality of evenly distributed conical portions (8); A liquid discharge valve (6) is fixedly mounted on the side wall of the intermediate storage cylinder (1), and a liquid inlet valve (7) communicating with the fluid chamber (1b) is fixedly mounted on the bottom of the intermediate storage cylinder (1).
2. The intermediate storage device for simulated oil according to claim 1, characterized in that: The liquid guide member (4) includes a connecting A tube (41), which is fixedly embedded in the piston float (3) and communicates with the driving chamber (1a) at the bottom of the piston float (3), and an elastic telescopic A tube (42) is fixedly installed on the connecting A tube (41), and a quick A connector (43) is fixedly installed on the top of the elastic telescopic A tube (42), and the quick A connector (43) is installed in the drainage hole (1c) opened at the top of the intermediate storage cylinder (1).
3. The intermediate storage device for simulated oil according to claim 1, characterized in that: The air release member (5) includes a connecting B tube (51), which is fixedly embedded in the piston float (3) and communicates with the driving chamber (1a) at the bottom of the piston float (3), and an elastic telescopic B tube (52) is fixedly installed on the connecting B tube (51), and a quick B connector (53) is fixedly installed on the top of the elastic telescopic B tube (52), and the quick B connector (53) is installed in the exhaust hole (1d) opened at the top of the intermediate storage cylinder (1).
4. The intermediate storage device for simulated oil according to claim 3, characterized in that: A solenoid valve (55) is fixedly mounted on the connecting pipe B (51).
5. The intermediate storage device for simulated oil according to claim 3, characterized in that: The degassing member (5) further includes a spring (54), the spring (54) being located in the elastic telescopic B tube (52), one end of the spring (54) being fixedly connected to the inner top wall of the exhaust hole (1d), and the other end of the spring (54) being fixedly connected to the upper surface of the piston floating plate (3).
6. The intermediate storage device for simulated oil according to claim 1, characterized in that: A spacer ring (11) is fixedly installed in the intermediate storage cylinder (1), and the piston disc (2) is located above the spacer ring (11).
7. The intermediate storage device for simulated oil according to claim 1, characterized in that: A supporting foot (12) is fixedly mounted on the bottom of the intermediate storage cylinder (1).