CN219733469U - Ultra-deep rock salt cavity making device capable of realizing forward and reverse circulation rotational flow injection - Google Patents

Abstract

The utility model discloses an ultra-deep rock salt cavity making device capable of realizing positive and negative circulation rotational flow injection, which comprises a water injection pipeline, a slurry pipeline, a halogen return pipeline and a plurality of valves on a loop formed by the water injection pipeline and the halogen return pipeline, wherein a central pipe is connected between the water injection pipeline and the halogen return pipeline; an outer pipe is connected between the mud pipeline and the halogen return pipeline, and the outer pipe is sleeved outside the central pipe; the central tube is provided with a reflow hole, and a plugging device is arranged inside the central tube; the bottom of the central tube is provided with a spraying device. In the utility model, 360-degree omnibearing injection of the injection head is realized through the structural design of the injection device during forward circulation, the pressure in the central tube is converted into rotational flow, the injection distance of water in the central tube is increased, the disturbance in a cavity is increased, the salt dissolution rate is improved, and the bottom efficient cavity making is realized; the reverse circulation cavity is replaced at intervals, so that the high-efficiency cavity formation at the middle and upper parts is realized, the formed cavity is more stable in shape, and the high-efficiency cavity formation of the rock salt can be effectively realized.

Description

Ultra-deep rock salt cavity making device capable of realizing forward and reverse circulation rotational flow injection

Technical Field

The utility model relates to the technical field of rock salt cavity making, in particular to an ultra-deep rock salt cavity making device capable of realizing positive and negative circulation rotational flow injection.

Background

Underground gas storage utilizes underground porous strata or closed caverns to store fuel gas. Is an economical and safe method for storing a large amount of fuel gas. The main function is to adjust the season unbalance of the fuel gas supply and demand and ensure the demand of the gas supply peak; the long-distance gas pipeline and equipment are balanced to operate, so that the utilization rate of the pipeline and the equipment is improved, and the gas transmission cost is reduced; the air supply is ensured under emergency situations such as accidents; in the design construction of the salt rock gas storage, the simulation test is often required to be carried out by a cavity-making simulation device of the salt rock gas storage so as to ensure feasibility and reliability, and then the next plan can be formulated.

For example, patent document CN201721473296.4 discloses a cavity-making simulation device for a rock salt gas storage, which relates to the technical field of natural gas underground gas storage; the upper end of the cavity is provided with a production sleeve, a central pipe is inserted into the production sleeve, and a surface sleeve is sleeved outside the production sleeve; the central pipe is connected with a water filling port and an oil filling port; an annulus is formed between the central pipe and the production sleeve, and the gas tank is connected with the annulus through a gas valve, a first pressure gauge and a pipeline; the central tube is connected with a second pressure gauge, and an air-water interface measuring instrument is arranged in the central tube; the first pressure gauge, the second pressure gauge and the air-water interface measuring instrument are connected with a computer. The cavity-making method has the advantages that the central pipe is too close to spray water in the cavity, the cavity wall which is far away cannot be easily sprayed after the cavity is formed into a certain size, the salt dissolution rate is low, the cavity-making efficiency is low, and the method cannot be suitable for practical production.

As another example, patent application number CN 200520016953.3 discloses a jet cavitation tool. Although the rotary cavity forming of the spray head is realized, the water flow disturbance is large at the bottom and the cavity forming speed is high, the salt dissolving cavity forming effect at the middle and upper parts is slowed down along with the small disturbance, the formed cavity is unstable, the discharge capacity is relatively small, and the cavity forming efficiency is low. Therefore, there is an urgent need to develop a device that can realize efficient cavity creation of rock salt.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides an ultra-deep rock salt cavity making device capable of realizing positive and negative circulation cyclone injection.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the ultra-deep rock salt cavity making device capable of realizing positive and negative circulation rotational flow injection comprises a water injection pipeline, a slurry pipeline, a halogen return pipeline and a plurality of valves on a loop formed by the water injection pipeline and the halogen return pipeline, wherein a central pipe is connected between the water injection pipeline and the halogen return pipeline; an outer pipe is connected between the mud pipeline and the halogen return pipeline, and the outer pipe is sleeved outside the central pipe; the central tube is provided with a reflow hole, and a plugging device is arranged inside the central tube; the bottom of the central tube is provided with a spraying device.

Further, the plugging device comprises a telescopic mechanism, a wall clamping mechanism, a sealing mechanism and a sealing plate.

Furthermore, the wall clamping mechanism and the sealing mechanism are hollow cylindrical structures, and the centers of the wall clamping mechanism and the sealing mechanism are provided with grid plates.

Further, the spraying device comprises a connecting seat, a rotating mechanism and a spraying head, wherein the spraying head is arranged on the connecting seat through the rotating mechanism.

Further, the rotating mechanism comprises a shell, a rotating shaft sleeve and a rotating bearing, wherein the rotating bearing is arranged between the rotating shaft sleeve and the shell.

Further, the spray heads are horizontally and transversely arranged, and the number of the spray heads is not less than 2.

Compared with the prior art, the utility model has the beneficial effects that:

in the utility model, 360-degree omnibearing injection of the injection head is realized through the structural design of the injection device during forward circulation, the pressure in the central tube is converted into rotational flow, the injection distance of water in the central tube is increased, the disturbance in a cavity is increased, the salt dissolution rate is improved, and the bottom efficient cavity making is realized; the reverse circulation cavity is replaced at intervals, so that the high-efficiency cavity making at the middle and upper parts is realized, the formed cavity is more stable in shape, and the high-efficiency cavity making of the rock salt can be effectively realized.

Drawings

Fig. 1: is a structural schematic diagram of the utility model;

fig. 2: an enlarged view of A-A of the present utility model;

fig. 3: is a schematic structural view of the plugging device;

fig. 4: a structural schematic diagram of the rotating mechanism of the utility model;

fig. 5: is a reverse circulation flow chart of the utility model;

in the figure: 1-a water injection line; 2-mud line; 3-halogen return line; 4-a central tube; 5-an outer tube; 6-plugging device; 61-telescoping mechanism; 62-a wall-clamping mechanism; 63-a sealing mechanism; 64-sealing plate; 7-a reflow hole; 8-connecting seats; 9-a rotation mechanism; 91-a housing; 92-rotating the shaft sleeve; 93-a swivel bearing; 10-an ejector head; 11-a spray chamber; 12-positioning rings; 13-grid plates; 14-a first inner rod; 15-a second inner rod; 16-mud pump.

Detailed Description

The present utility model will be described in further detail with reference to the preferred embodiments, and more details are set forth in the following description in order to provide a thorough understanding of the present utility model, but it will be apparent that the present utility model can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present utility model, and therefore should not be construed to limit the scope of the present utility model in the context of this particular embodiment.

As shown in figures 1-2, the ultra-deep rock salt cavity making device capable of realizing forward and reverse circulation rotational flow injection comprises a water injection pipeline 1, a slurry pipeline 2, a halogen return pipeline 3 and a plurality of valves on a loop formed by the water injection pipeline 1, wherein the water injection pipeline 1 is connected with a water injection pump, a central pipe 4 is connected between the water injection pipeline 1 and the halogen return pipeline 3, and a valve H2 is arranged at the joint. The water injection pipeline 1 and the halogen return pipeline 3 are sequentially provided with a valve Z3, a valve Z1 and a valve H1.

The mud pipeline 2 is connected with a mud pump 16, an outer pipe 5 is connected between the mud pipeline 2 and the halogen return pipeline 3, the outer pipe 5 is sleeved outside the central pipe 4, and the central pipe 4 extends to the outside of the outer pipe 5. And a valve Z4, a valve Z2 and a valve H3 are sequentially arranged on the mud pipeline 2 and the halogen return pipeline 3.

The central tube 4 is provided with reflow holes 7, the number of which is preferably two, and which are respectively arranged at two sides of the central tube 4.

The plugging device 6 is arranged in the central tube 4, as shown in fig. 3, the plugging device 6 comprises a telescopic mechanism 61, a wall clamping mechanism 62, a sealing mechanism 63 and a sealing plate 64, the telescopic mechanism 61 is a two-stage telescopic device, the telescopic mechanism 61 comprises a shell, a first inner rod 14, a second inner rod 15 and a driving mechanism, the wall clamping mechanism 62 is arranged on the shell of the telescopic mechanism 61, and the wall clamping mechanism 62 is fixedly arranged in the central tube 4 through a positioning ring 12 in the central tube 4; the sealing mechanism 63 is mounted on the first inner rod 14, the sealing plate 64 is mounted on the second inner rod 15, and the telescopic states of the first inner rod 14 and the second inner rod 15 are controlled by the driving mechanism, so that the sealing mechanism 63 and the sealing plate 64 are driven to move. The wall clamping mechanism 62 and the sealing mechanism 63 are hollow cylindrical structures, and the centers of the wall clamping mechanism and the sealing mechanism are provided with the grid plates 13, so that water flow can pass through the grid plates 13. The sealing mechanism 63 is arranged at a position corresponding to the backflow hole 7, and can completely seal the backflow hole 7, the outer wall of the sealing mechanism 63 is made of elastic materials, and the sealing mechanism 63 can move in the central tube 4 while ensuring the tightness of the central tube 4 during positive circulation water injection. The sealing plate 64 is circular, and the diameter of the sealing plate 64 corresponds to the diameter of the inner wall of the sealing mechanism 63, that is, the sealing plate 64 contracts along with the second inner rod 15 to enter the sealing mechanism 63 during cavity formation in reverse circulation, and is matched with the sealing mechanism 63 to realize sealing, so that brine or slurry is prevented from entering the lower structure to cause blockage during reverse circulation.

The bottom of center tube 4 is equipped with injection apparatus, injection apparatus includes connecting seat 8, rotary mechanism 9, injection head 10, connecting seat 8 is inside hollow cylindrical cavity, and its top with the bottom of center tube 4 is connected, injection head 10 passes through rotary mechanism 9 and installs on connecting seat 8, the inside hollow structure that is of injection head 10, the quantity of injection head 10 is not less than 2, just injection cavity 11 of injection head 10 with connecting seat 8 communicates with each other, is convenient for through connecting seat 8 to injection cavity 11 in water delivery for water is spouted from injection head 10. The injection head 10 and the injection cavity 11 are horizontally and transversely arranged, so that impact force on surrounding rock mass is enhanced.

As shown in fig. 4, the rotation mechanism 9 includes a housing 91, a rotation sleeve 92, and a rotation bearing 93, and the rotation bearing 93 is provided between the rotation sleeve 92 and the housing 91. Specifically, the rotary bearing 93 is disposed to facilitate the relative rotation between the housing 91 and the rotary sleeve 92, thereby realizing 360 ° rotation of the injector head 10.

Specifically, when the cavity is formed during positive circulation, the valve Z1, the valve Z3, the valve H2 and the valve H3 are opened, the valve Z2, the valve Z4 and the valve H1 are closed, water is pumped into the water injection pipeline 1 by the water supply pump and enters the central pipe 4, the first inner rod 14 and the second inner rod 15 of the telescopic mechanism 61 are in an extending state, namely, water flows through the sealing plate 64, the sealing mechanism 63 and the wall clamping mechanism 62 in sequence, when the water enters the base 1, flows through the rotating mechanism 9 and then flows into the injection cavity 11, and is sprayed out from the injection head 10, at the moment, the reverse thrust sprayed out by the injection head 10 is transmitted to the rotating mechanism 9, the ground is not required to provide rotating power, the rotating speed of the spray head can be adjusted, the pressure in the central pipe 4 is converted into rotational flow power, the injection head 10 rotates along with the rotating mechanism 9, no dead angle exists in 360 degrees, and all-direction injection is realized, namely, the rotary injection realizes efficient cavity formation. Brine is discharged via the annular space between the outer tube 5 and the central tube 4.

When the reverse circulation is dissolved in the cavity, the valve Z3, the valve Z2, the valve H2 and the valve H1 are opened, the valve Z1, the valve Z4 and the valve H3 are closed, the first inner rod 14 and the second inner rod 15 of the telescopic mechanism 61 are contracted, the sealing mechanism 63 and the sealing plate 64 are contracted together, the lower part of the sealing mechanism 63 is completely sealed, meanwhile, the backflow hole 7 is exposed, fresh water is injected from the annular cavity between the outer tube 5 and the central tube 4, and brine enters the central tube 4 from the backflow hole 7 to discharge brine, as shown in fig. 5.

The utility model realizes the bottom efficient cavity creation through forward circulation cavity creation; the interval is replaced and is made the chamber in reverse circulation, realizes the high-efficient chamber of upper and middle portion, and the cavity form that forms is the pear type, is more stable from the mechanical angle, and the discharge capacity is bigger moreover, makes the chamber efficient, effectively realizes that salt rock is high-efficient to make the chamber.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (6)

1. The ultra-deep rock salt cavity making device capable of realizing positive and negative circulation rotational flow injection comprises a water injection pipeline (1), a slurry pipeline (2), a halogen return pipeline (3) and a plurality of valves on a loop formed by the water injection pipeline (1) and the halogen return pipeline (3), and is characterized in that a central pipe (4) is connected between the water injection pipeline (1) and the halogen return pipeline (3); an outer pipe (5) is connected between the mud pipeline (2) and the halogen return pipeline (3), and the outer pipe (5) is sleeved outside the central pipe (4); a backflow hole (7) is formed in the central tube (4), and a plugging device (6) is arranged in the central tube; the bottom of the central tube (4) is provided with a spraying device.

2. The ultra-deep rock salt cavity making device capable of realizing positive and negative circulation rotational flow injection according to claim 1, wherein the plugging device (6) comprises a telescopic mechanism (61), a wall clamping mechanism (62), a sealing mechanism (63) and a sealing plate (64).

3. The ultra-deep rock salt cavity making device capable of realizing positive and negative circulation cyclone injection according to claim 2, wherein the wall clamping mechanism (62) and the sealing mechanism (63) are of hollow cylindrical structures, and the centers of the wall clamping mechanism and the sealing mechanism are provided with grid plates (13).

4. The ultra-deep rock salt cavity making device capable of realizing positive and negative circulation cyclone injection according to claim 1, wherein the injection device comprises a connecting seat (8), a rotating mechanism (9) and an injection head (10), and the injection head (10) is arranged on the connecting seat (8) through the rotating mechanism (9).

5. The ultra-deep rock salt cavity forming device capable of realizing positive and negative circulation cyclone injection according to claim 4, wherein the rotating mechanism (9) comprises a shell (91), a rotating shaft sleeve (92) and a rotating bearing (93), and the rotating bearing (93) is arranged between the rotating shaft sleeve (92) and the shell (91).

6. The ultra-deep rock salt cavity device capable of performing forward and reverse circulation rotational flow injection according to claim 4, wherein the injection heads (10) are horizontally and transversely arranged, and the number of the injection heads is not less than 2.