Foam scrubbing agent performance evaluation device

Abstract

The invention discloses a foam scrubbing agent performance evaluation device, which comprises a gas supply device, a mixing device and a pressure buffer device, the mixing device comprises a vertical cylinder, the outer side of the cylinder is provided with a heating device for heating the inside of the cylinder, the heating device comprises two semicircular heating plates and a locking assembly, and the two semicircular heating plates are connected with the pressure buffer device. The two heating plates can mutually embrace the outer side of the barrel after being in butt joint, the locking assembly is used for locking and fixing the heating plates, the gas supply equipment, the mixing equipment and the pressure buffering equipment are arranged, the performance of the foam scrubbing agent can be evaluated, and the barrel, the heating plates and the locking assembly are arranged in the mixing equipment, so that the performance of the foam scrubbing agent can be evaluated. The assembly operation of the heating device can be conveniently and stably completed before evaluation, and the underground temperature can be accurately regulated, controlled and simulated in a water circulation heating mode, so that the accuracy during evaluation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of foaming agent evaluation, and in particular to a foaming agent performance evaluation device. Background Art

[0002] Foam drainage gas production technology is a relatively effective gas production method for gas wells with low pressure, insufficient self-flowing capacity, and gas flow rate in the wellbore less than the critical flow rate. This method requires the foaming agent to have good foaming performance, foam stability and liquid carrying capacity, that is, it can produce a large amount of foam, and the foam has good stability and can carry the bottom of the well to the ground smoothly. Therefore, the evaluation of the performance of the foaming agent is particularly important.

[0003] Among the current evaluation methods, the airflow-stirring method is a common method for evaluating the performance of foaming agents (one of the important components of foaming agents). However, if the diameter of the measuring cylinder is too small (less than 3 cm), there will be a wall hanging effect, which will cause errors in the test results. Due to its simple operation, the oscillation method is widely used in the laboratory to determine the foaming ability of solutions, but it is difficult to control the intensity, speed, direction, time, etc. of the oscillation, and the error between each experiment is large. In addition, the above methods all evaluate the foaming agent under normal pressure, and it is impossible to pressurize and simulate the wellbore environment, resulting in a large difference between the performance evaluated indoors and the actual performance on site. Therefore, it is necessary to improve the existing foaming agent evaluation methods.

[0004] The prior art discloses a Chinese invention patent with a publication number of CN207067098U, which discloses a pressurized evaluation device for the performance of a foaming agent, including a bracket, a high-pressure container vertically arranged on the bracket, and a temperature control system connected to the high-pressure container; the upper and lower ends of the high-pressure container are respectively connected to the nitrogen pressurization system through an air inlet pipeline, and a liquid inlet and a liquid discharge pipeline are also arranged at the upper end of the high-pressure container, the liquid discharge pipeline is connected to the pressure buffer container, and an exhaust pipeline is connected to the upper end surface of the pressure buffer container, and the outlet end of the exhaust pipeline is connected to a gas flow meter; a liquid discharge port and a sand core plate for evenly distributing the gas are arranged at the bottom of the high-pressure container, a pressure-resistant glass window is arranged on the side of the high-pressure container, and a scale ruler is arranged on one side of the pressure-resistant glass window; the device can evaluate the performance of the foaming agent at different flow rates under pressure, and compared with the current evaluation device that cannot be pressurized, the foaming agent is evaluated by simulation, which is closer to the bottom of the well.

[0005] However, the above patent technology does not disclose the specific structure of the temperature control system, and the traditional temperature control system is mostly implemented by using an electric heating film to heat and simulate the underground temperature environment. However, this heating method is not linear enough and is not convenient for accurate temperature control during simulation. Therefore, the present invention provides a foaming agent performance evaluation device to solve the above problems. Summary of the invention

[0006] In order to solve the technical problems raised in the above background technology, the present invention provides a foaming agent performance evaluation device.

[0007] The present invention is implemented by the following technical scheme: a foaming agent performance evaluation device, comprising an air supply device, a mixing device and a pressure buffer device, wherein the air supply device is used to convey nitrogen with a predetermined pressure into the mixing device, the mixing device is used to mix the foaming agent and nitrogen to form a mixed fluid, and convey the mixed fluid to the buffer device, and the buffer device is used to separate and collect the liquid phase fluid in the mixed fluid; the mixing device comprises an upright cylinder, a heating device for heating the inside of the cylinder is arranged on the outside of the cylinder, the heating device comprises two semi-annular heating plates and a locking assembly, the two heating plates can embrace each other on the outside of the cylinder after docking, and the locking assembly is used to lock and fix the heating plates.

[0008] As a further improvement of the above solution, the locking assembly includes two connecting blocks respectively fixed to the outer sides of both ends of the heating plate.

[0009] When the two heating plates are butt-jointed, the two adjacent connection blocks are fixed by the same positioning seat, and the positioning seat is provided with two card slots on the centripetal side, and the two card slots are respectively used for the two adjacent connection blocks to be card-joined.

[0010] As a further improvement of the above scheme, positioning plates are provided on the outer sides of the two heating plates, and the two ends of the two positioning plates are fixed by a first clamping rod. A first through hole for the first clamping rod to pass through is provided on the connecting block, and a first clamping hole matching the first clamping rod is provided on the positioning plate.

[0011] As a further improvement of the above scheme, second clamping holes are opened on both axial sides of the outer walls of the two first clamping rods, second clamping rods matching with the second clamping holes are arranged on both sides of the centripetal end of the positioning seat, and second through holes connected to the first clamping holes and for the second clamping rod to pass through are radially opened on the outer side of the positioning plate.

[0012] As a further improvement of the above solution, a plate placement groove adapted to be snap-fitted with the outer side of the heating plate is provided on the side of the positioning plate facing the heating plate, and a supporting foot is provided at the bottom of the positioning plate.

[0013] As a further improvement of the above solution, both of the two heating plates have a flow channel cavity inside, and a water inlet pipe and a water outlet pipe connected to the flow channel cavity are respectively arranged on the outer walls of the heating plates.

[0014] As a further improvement of the above solution, the top of the cylinder body is provided with a cylinder cover, the top of the cylinder cover is respectively provided with a liquid inlet pipe valve, an upper air inlet valve pipe, and a liquid discharge valve pipe, and the bottom of the cylinder body is provided with a lower air inlet valve pipe.

[0015] As a further improvement of the above solution, a sand core plate is arranged inside the cylinder.

[0016] As a further improvement of the above solution, the gas supply equipment includes a nitrogen bottle, and the nitrogen bottle is respectively connected to the upper intake valve pipe and the lower intake valve pipe through pipelines.

[0017] As a further improvement of the above solution, the pressure buffer device includes a pressure buffer container, the input end of the pressure buffer container is connected to the output end of the drain valve pipe through a pipeline, and the output end of the pressure buffer container is connected to the gas flow meter through a pipeline.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The foaming agent performance evaluation device of the present invention can evaluate the performance of the foaming agent by arranging an air supply device, a mixing device and a pressure buffer device, and the cylinder, heating plate and locking assembly arranged in the mixing device can conveniently and stably complete the assembly operation of the heating device before the evaluation, and can accurately control the simulated underground temperature by water circulation heating to ensure the accuracy of the evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the overall structure of the mixing equipment;

[0022] Figure 3 for Figure 2 A schematic diagram of the top view of the cross-sectional structure of the middle cylinder, heating plate and positioning plate in the assembled state;

[0023] Figure 4 for Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0024] Description of main symbols:

[0025] 1. Air supply equipment; 2. Mixing equipment; 3. Pressure buffer equipment; 4. Cylinder; 5. Cylinder cover; 6. Liquid inlet valve pipe; 7. Upper air inlet valve pipe; 8. Liquid discharge valve pipe; 9. Lower air inlet valve pipe; 10. Heating plate; 11. Water inlet pipe; 12. Water outlet pipe; 13. Positioning plate; 14. Plate groove; 16. Channel cavity; 17. Connecting block; 18. First through hole; 19. First clamping hole; 20. First clamping rod; 21. Positioning seat; 22. Clamping groove; 23. Second through hole; 24. Second clamping rod; 25. Second clamping hole. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] Please combine Figures 1 to 4 The foaming agent performance evaluation device includes an air supply device, a mixing device and a pressure buffer device. The air supply device is used to transport nitrogen with a predetermined pressure into the mixing device. The mixing device is used to mix the foaming agent and the nitrogen to form a mixed fluid and transport the mixed fluid to the buffer device. The buffer device is used to separate and collect the liquid phase fluid in the mixed fluid.

[0028] The mixing device comprises an upright cylinder 4, and a heating device for heating the inside of the cylinder is arranged on the outside of the cylinder 4, and the heating device is used to heat and simulate the downhole temperature.

[0029] The temperature raising device comprises two semi-circular heating plates 10 and a locking assembly. After the two heating plates 10 are butted together, they can be mutually embraced on the outside of the cylinder 4 . The locking assembly is used for locking and fixing the heating plates 10 .

[0030] The locking assembly includes two connecting blocks 17 respectively fixed to the outer sides of both ends of the heating plate 10 .

[0031] When the two heating plates 10 are butted together, two adjacent connection blocks 17 are fixed by the same positioning seat 21 . The positioning seat 21 has two card slots 22 formed toward the center. The two card slots 22 are respectively used for card-fitting of the two adjacent connection blocks 17 .

[0032] A positioning plate 13 is provided on the outside of the two heating plates 10. The two ends of the two positioning plates 13 are fixed by a first clamping rod 20. A first through hole 18 for the first clamping rod 20 to pass through is opened on the connecting block 17, and a first clamping hole 19 matching with the first clamping rod 20 is opened on the positioning plate 13.

[0033] Second clamping holes 25 are provided on both axial sides of the outer walls of the two first clamping rods 20, second clamping rods 24 matching the second clamping holes 25 are provided on both sides of the centripetal end of the positioning seat 21, and second through holes 23 connected to the first clamping holes 19 and for the second clamping rods 24 to pass through are radially provided on the outer side of the positioning plate 13.

[0034] A plate placement groove 14 adapted to be snap-fitted with the outer side of the heating plate 10 is provided on one side of the positioning plate 13 facing the heating plate 10 , and a supporting foot is provided at the bottom of the positioning plate 13 .

[0035] Both heating plates 10 have a flow channel cavity 16 inside, and a water inlet pipe 11 and a water outlet pipe 12 communicating with the flow channel cavity 16 are respectively arranged on the outer wall of the heating plate 10. Hot water with a predetermined temperature is input into the flow channel cavity 16 of the heating plate 10 through the water inlet pipe 11, and flows out from the water outlet pipe 12 to form a heat exchange cycle, thereby facilitating the adjustment of the temperature in the cylinder 4.

[0036] The top of the cylinder 4 is provided with a cylinder cover 5, and the top of the cylinder cover 5 is respectively provided with a liquid inlet pipe valve 6, an upper air inlet valve pipe 7, and a liquid discharge valve pipe 8, and the bottom of the cylinder 4 is provided with a lower air inlet valve pipe 9. The liquid inlet pipe valve 6, the upper air inlet valve pipe 7, the liquid discharge valve pipe 8, and the lower air inlet valve pipe 9 are all structures for installing valves on pipelines.

[0037] A sand core plate is arranged inside the cylinder 4 .

[0038] The gas supply equipment comprises a nitrogen cylinder, which is respectively connected to an upper air inlet valve pipe 7 and a lower air inlet valve pipe 9 through pipelines.

[0039] The pressure buffer device comprises a pressure buffer container, the input end of the pressure buffer container is connected to the output end of the drain valve pipe 8 through a pipeline, and the output end of the pressure buffer container is connected to the gas flow meter 10 through a pipeline.

[0040] The working principle of this embodiment:

[0041] During assembly, first, the two heating plates 10 are hugged together on the outside of the cylinder 4, and then the first clamping rod 20 is passed through the first through holes 18 of the two adjacent connecting blocks 17, and then the two positioning plates 13 are brought close to each other so that the outer wall of the heating plate 10 enters the plate groove 14, and the positioning seat 21 is moved toward the connecting block 17, so that the connecting block 17 is inserted into the clamping groove 22, and the second clamping rod 24 is passed through the second through hole 23 and inserted into the second clamping hole 25, thereby completing the assembly and fixation of the heating plate 10 on the cylinder 4.

[0042] Before the evaluation operation, first add the foaming agent solution into the cylinder 4 from the liquid inlet valve pipe 6 and close the liquid inlet valve pipe 6, adjust the outlet pressure of the nitrogen bottle to the evaluation required value, then open the upper air inlet valve pipe 7 to allow the gas to enter the cylinder 4 for pressure saturation, and after reaching the required pressure value, open the lower air inlet valve pipe 9 to continue saturation for a period of time (to form a mixed fluid). Subsequently, while keeping the outlet pressure of the nitrogen bottle constant, open the liquid discharge valve pipe 8, at this time, the gas is evenly mixed into the foaming agent solution from the sand core plate at the bottom of the cylinder 4 and forms a large number of bubbles, the bubbles carry the solution through the pipeline into the pressure buffer container, the liquid phase fluid carried out is left in the pressure buffer container 8, and the gas phase fluid is finally discharged through the gas flowmeter 10.

[0043] During the evaluation process, by adjusting the valve opening and closing size of the drainage valve pipe 8, controlling the gas flow rate, and combining with the heating device, the foaming height, foam stabilization performance, liquid carrying capacity and other performances of the foaming agent under different underground drainage conditions can be simulated and evaluated, and intuitive monitoring can be carried out through the pressure-resistant glass window provided on the cylinder.

[0044] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A foaming agent performance evaluation device, characterized in that: It includes an air supply device, a mixing device and a pressure buffer device. The air supply device is used to transport nitrogen with a predetermined pressure into the mixing device. The mixing device is used to mix the foaming agent and the nitrogen to form a mixed fluid and transport the mixed fluid to the buffer device. The buffer device is used to separate and collect the liquid phase fluid in the mixed fluid. The mixing device includes an upright cylinder. A heating device for heating the inside of the cylinder is arranged on the outside of the cylinder. The heating device includes two semi-annular heating plates and a locking assembly. The two heating plates can be mutually embraced on the outside of the cylinder after docking. The locking assembly is used to lock and fix the heating plates.

2. The foaming agent performance evaluation device according to claim 1, characterized in that: The locking assembly includes two connecting blocks respectively fixed on the outer sides of both ends of the heating plate; when the two heating plates are docked, the two adjacent connecting blocks are fixed by the same positioning seat, and the positioning seat has two card slots on the centripetal side, and the two card slots are respectively provided for the two adjacent connecting blocks to engage with each other.

3. The foaming agent performance evaluation device according to claim 2, characterized in that: A positioning plate is arranged on the outside of the two heating plates, and the two ends of the two positioning plates are fixed by a first clamping rod. The connecting block is provided with a first through hole for the first clamping rod to pass through, and the positioning plate is provided with a first clamping hole matching the first clamping rod.

4. The foaming agent performance evaluation device according to claim 3, characterized in that: Second clamping holes are provided on both axial sides of the outer walls of the two first clamping rods, second clamping rods matching the second clamping holes are provided on both sides of the centripetal end of the positioning seat, and second through holes connected to the first clamping holes and for the second clamping rods to pass through are radially provided on the outer side of the positioning plate.

5. The foaming agent performance evaluation device according to claim 3, characterized in that: A plate placement groove adapted to be snap-fitted with the outer side of the heating plate is provided on one side of the positioning plate facing the heating plate, and a supporting foot is provided at the bottom of the positioning plate.

6. The foaming agent performance evaluation device according to claim 3, characterized in that: The two heating plates have flow channel cavities inside, and the outer walls of the heating plates are respectively provided with a water inlet pipe and a water outlet pipe connected to the flow channel cavities.

7. The foaming agent performance evaluation device according to claim 1, characterized in that: The top of the cylinder body is provided with a cylinder cover, the top of the cylinder cover is respectively provided with a liquid inlet pipe valve, an upper air inlet valve pipe, and a liquid discharge valve pipe, and the bottom of the cylinder body is provided with a lower air inlet valve pipe.

8. The foaming agent performance evaluation device according to claim 1, characterized in that: A sand core plate is arranged inside the cylinder.

9. The foaming agent performance evaluation device according to claim 1, characterized in that: The gas supply equipment comprises a nitrogen bottle, and the nitrogen bottle is respectively connected to an upper air intake valve pipe and a lower air intake valve pipe through pipelines.

10. The foaming agent performance evaluation device according to claim 1, characterized in that: The pressure buffer device comprises a pressure buffer container, an input end of the pressure buffer container is connected to an output end of a drain valve pipe through a pipeline, and an output end of the pressure buffer container is connected to a gas flow meter through a pipeline.

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