CN114412431A - Groove building tool for rock salt solution mining and matched mining process - Google Patents
Groove building tool for rock salt solution mining and matched mining process Download PDFInfo
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- CN114412431A CN114412431A CN202210042313.8A CN202210042313A CN114412431A CN 114412431 A CN114412431 A CN 114412431A CN 202210042313 A CN202210042313 A CN 202210042313A CN 114412431 A CN114412431 A CN 114412431A
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- 235000002639 sodium chloride Nutrition 0.000 title claims abstract description 71
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 47
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 47
- 238000005065 mining Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 20
- 239000000243 solution Substances 0.000 title claims abstract description 20
- 239000007921 spray Substances 0.000 claims abstract description 58
- 238000000926 separation method Methods 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 239000012267 brine Substances 0.000 claims description 26
- 150000003839 salts Chemical class 0.000 claims description 24
- 238000004090 dissolution Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 210000001503 joint Anatomy 0.000 claims description 9
- 210000000056 organ Anatomy 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000003628 erosive effect Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 13
- 239000013505 freshwater Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 230000005465 channeling Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 241001131796 Botaurus stellaris Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
Abstract
The invention discloses a groove building tool for rock salt water-soluble mining and a matched mining process, and relates to the technical field of rock salt water-soluble groove building and mining processes, wherein the groove building tool comprises a throat pipe and a spray pipe, the throat pipe is fixedly connected with the spray pipe, the spray pipe is provided with a pin shaft hole, a semicircular separation blade is connected with the pin shaft hole through a pin shaft, and the arc top distance of the semicircular separation blade is close to the inner diameter of the throat pipe; the sealing gasket comprises a first sealing gasket used for blocking the semicircular blocking piece, and the first sealing gasket is connected with the spray pipe. The invention has simple structure and easy manufacture, saves the time for constructing the groove for rock salt solution mining, reduces cost, improves efficiency and improves the ore recovery rate.
Description
Technical Field
The invention relates to the technical field of rock salt water-soluble groove building and mining processes, in particular to a groove building tool for rock salt water-soluble mining and a matched mining process.
Background
The rock salt solution mining is a mining method that a channel from the ground to a salt layer is formed by means of drilling and the like, fresh water is injected to dissolve soluble salt minerals of the salt layer, and brine is returned. At the initial stage of groove building, the area of rock salt and fresh water contact is less, and in order to guarantee higher export brine concentration, the water injection discharge capacity is difficult too big, because the ordinary groove building method is that fresh water is straight out from oil pipe, and big discharge capacity has only increased the velocity of flow of brine in the well bore, and brine just discharges ground not fully dissolved rock salt, has both caused the energy waste and can not obviously reduce the time of building the groove. In the production stage, due to the water-soluble characteristic of rock salt, the dissolution rate of the upward dissolution is twice that of the lateral dissolution, a single well-convection well can form a horn-shaped salt cavity in the later production stage, salt minerals below the lateral side cannot be exploited, the conditions of a horizontal well group are similar, the dissolution rate of a water injection well is higher than that of a drainage well, the dissolution of a horizontal section is uneven, and a large amount of minerals cannot be exploited; in addition, the top plate of the salt layer can be exposed until the top plate and the cover layer collapse without controlling the upper dissolution, the salt cavity channel is blocked, and finally the well is abandoned, and the abandoned bittern well can cause environmental pollution according to different geological conditions and bittern associated gas.
At present, a single-well groove is built by promoting the local contact of fresh water and a well wall to achieve the purpose of dissolving and building the groove in a central pipe water injection (drainage) and annular space drainage (water injection) mode, a horizontal well group convection groove is built by dissolving the well wall when the fresh water flows through a salt layer open hole section, the two types of well grooves are slow expansion processes for dissolving the well wall, an initial flow channel is narrow, the contact area is small, the fresh water quantity is small, brine concentration cannot be dissolved continuously once saturated, meanwhile, the flow channel can be blocked due to impurity accumulation and insoluble interlayer collapse in a salt layer, and the time for building the groove is determined to be longer by the factors. No matter the well is a single well, a directional well or a horizontal well, a well hole penetrates into a salt layer from top to bottom, and an upward water flow velocity is inevitably formed in the water injection and drainage process of a common mining process, so that the upward dissolution effect is enhanced, a non-uniform corrosion salt cavity is formed, and further a salt layer top plate collapses. The salt layer top plate can be protected by an oil-gas cushion method, brine and the top plate can be separated by low-density oil gas, but the method is high in cost and less in practical application. Therefore, a tool for shortening the time of constructing the trough and expanding a channel for constructing the trough is needed, and a salt bed brine transverse flowing water-soluble mining process is designed under the cooperation of the tool, so that the upward water flow velocity around a salt bed water injection port and a water discharge port is weakened, a salt bed top plate is protected, and the rock salt ore recovery rate is improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a groove building tool for rock salt solution mining and a matched mining process.
The purpose of the invention is realized by the following technical scheme: a matched mining process for rock salt solution mining comprises the following steps:
s1: drilling a horizontal well at the bottom of the salt layer, wherein the horizontal section is short, drilling a horizontal butt well on the other side, and the horizontal section is long, and then butting a well hole of the horizontal well;
s2: a common oil pipe is welded with a groove building tool and is put into the bottom of a horizontal well, a continuous oil pipe is welded with the groove building tool and is put into the bottom of a horizontal butt well, and meanwhile, the groove building tool on the common oil pipe and the groove building tool on the continuous oil pipe have an interval which is convenient for rock salt water soluble exploitation;
s3: horizontally butting a well for water injection, forming cavitation jet flow by high-pressure water flow under the action of a grooving tool to erode and dissolve rock salt to form saturated brine, pushing the saturated brine away a semicircular separation blade of the grooving tool on the horizontal well, and allowing the saturated brine to enter a common oil pipe for discharge;
s4: when the brine concentration in a common oil pipe is reduced, the coiled tubing needs to be lifted out of the horizontal butt-joint well for a certain distance, then the continuous erosion and dissolution are carried out, and the circulation is carried out until a groove building tool on the coiled tubing reaches the tail end of the horizontal butt-joint well;
s5: and continuing to start the pump for production, adjusting the water flow injected into the horizontal butt joint well according to the outlet brine concentration so as to control the concentration of the discharged brine until the degree of saturated brine is reached, and regularly exchanging the horizontal well and the horizontal butt joint well until the designed exploitation amount is reached.
In the step S3, water enters from the left end of the throat pipe of the channeling tool on the horizontal butt well and is sprayed on the semicircular separation blade, the semicircular separation blade is tightly attached to the sealing gasket by the impact force of the water to prevent the water from being sprayed out from the right end of the spray pipe in a large area, the whole flow channel of the channeling tool forms an organ pipe cavitation jet structure due to the smaller sectional area of the throat pipe and the smaller sectional areas of the spray holes and the separation blade spray holes, the water is sprayed out from the spray holes and the separation blade spray holes to erode and dissolve rock salt by high-speed water flow, the effect of stirring fluid is achieved at the same time, the phenomenon that the brine concentration of the solid-liquid two-phase interface is too high to be recrystallized is avoided, the channeling time is shortened, saturated brine is formed after the rock salt is dissolved, the saturated brine pushes away the semicircular separation blade of the channeling tool on the horizontal well, and enters a common oil pipe to be discharged.
In the step S4, the distance that the coiled tubing is lifted out of the horizontal butt well is not more than two meters, and if the groove building tool is located in the middle of the horizontal section, the distance that the coiled tubing is lifted out of the horizontal butt well is smaller than the distance that the coiled tubing is lifted out of the horizontal butt well when the groove building tool is located at the two ends of the horizontal section.
The utility model provides a groove instrument of building of water-soluble exploitation of rock salt, includes choke and spray tube, the one end and the choke welding of spray tube link to each other, and the inner wall shrink of the other end of spray tube forms the step face, and outer wall arc convergence meets with the inner wall, and the inner wall terminal surface of shrink sets up trapezoidal crossbeam, and the pipe wall symmetric position that is close to trapezoidal crossbeam is provided with the round pin shaft hole, and the semicircle separation blade is connected through round pin axle and round pin shaft hole, and the round pin axle is through welded fastening and sealed, the arc top of semicircle separation blade is apart from the internal diameter that is close the choke, the semicircle separation blade have two, constitute hinge structure with the round pin axle, the semicircle separation blade can rotate in a flexible way in the spray tube, through position around step face and the stopper restriction.
Further, sealed the pad including being used for blockking the first sealed pad of semicircle separation blade, first sealed pad is connected and sets up the position at the step face with the spray tube, be provided with the sealed pad of second between round pin axle and the trapezoidal crossbeam, the sealed pad setting of second is inboard at the trapezoidal crossbeam for seal the gap of semicircle separation blade and round pin axle department of meeting position, provide certain supporting role simultaneously.
Semicircle separation blade is provided with separation blade orifice and stopper, evenly be provided with the orifice around the pipe wall of spray tube, separation blade orifice and orifice are the injection passageway of leaving for rivers when the spray tube is plugged up to the semicircle separation blade, and the stopper avoids two semicircle separation blades collisions to cause the damage together when two semicircle separation blades are closed, and when two semicircle separation blades received rivers impact, it is more easily by the impact separately hugged closely on the sealing pad simultaneously.
The groove building tool is connected with an oil pipe in a welding mode when in use, a cavitation structure is formed at the position of the throat pipe, and an organ pipe self-vibration cavitation jet structure is formed due to the fact that the total area of the spray holes and the blocking piece spray holes is smaller than the inner diameter sectional area of the throat pipe, and water flow can impact and corrode rock salt better through the organ pipe self-vibration cavitation jet structure.
Preferably, the inner diameters of both sides of the throat pipe are gradually increased to form an open shape compared with the inner diameter of the middle part, and the open shape can reduce the flow rate of the water flow but enhance the impact force of the water flow.
The invention has the beneficial effects that:
1. the invention converts the fluid flowing axially in the pipe into axial and radial cavitation jet, increases the discharge speed and coverage range of the fluid under the condition of constant discharge capacity, and plays the roles of quickly eroding rock salt and strengthening convection.
2. The invention realizes the stepless regulation of the position of the groove building tool by utilizing the coiled tubing, thereby reducing the labor intensity.
3. According to the invention, rock salt is uniformly dissolved by the brine flowing transversely in the salt cavity, so that the salt layer top plate is prevented from being exposed prematurely, and the rock salt ore recovery rate is improved.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is a schematic diagram of a right-view structure of the semicircular baffle plate tightly attached to the sealing pad;
FIG. 3 is a schematic view of a semi-circular flap hinge of the present invention;
FIG. 4 is a schematic diagram of salt formation tank construction according to the present invention;
FIG. 5 is a schematic view of the present invention illustrating the completion of the tank building;
in the figure: the device comprises a throat 1, a spray pipe 2, a semicircular baffle 3, a pin shaft 4, a sealing gasket 5, a spray hole 2-1, a pin shaft hole 2-2, a trapezoidal beam 2-3, a baffle spray hole 3-1 and a limiting block 3-2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1-5, a complete mining process for rock salt solution mining comprises the following steps:
s1: drilling a horizontal well at the bottom of the salt layer, wherein the horizontal section is short, drilling a horizontal butt well on the other side, and the horizontal section is long, and then butting a well hole of the horizontal well;
s2: a common oil pipe is welded with a groove building tool and is put into the bottom of a horizontal well, a continuous oil pipe is welded with the groove building tool and is put into the bottom of a horizontal butt well, and meanwhile, the groove building tool on the common oil pipe and the groove building tool on the continuous oil pipe have an interval which is convenient for rock salt water soluble exploitation;
s3: horizontally butting the well for water injection, forming cavitation jet flow by high-pressure water flow under the action of a grooving tool to erode and dissolve rock salt to form saturated brine, pushing the saturated brine away a semicircular separation blade 3 of the grooving tool on the horizontal well, and allowing the saturated brine to enter a common oil pipe for discharge;
s4: when the brine concentration in a common oil pipe is reduced, the coiled oil pipe needs to be lifted out of the horizontal butt-joint well by 2m (the lifting distance of the coiled oil pipe is 1m when the groove building tool is arranged in the middle of the horizontal section), then the erosion and the dissolution are continued, the circulation is carried out in this way until the groove building tool on the coiled oil pipe reaches the tail end of the horizontal butt-joint well, and the lifting of the coiled oil pipe is stopped;
s5: and continuing to start the pump for production, adjusting the water flow injected into the horizontal butt joint well according to the outlet brine concentration so as to control the concentration of the discharged brine until the degree of saturated brine is reached, and regularly exchanging the horizontal well and the horizontal butt joint well until the designed exploitation amount is reached.
In step S3, water enters from the left end of the throat pipe 1 of the groove building tool horizontally butted on the well and is sprayed on the semicircular baffle plate 3, the semicircular baffle plate 3 is tightly attached to the sealing gasket 5 by the impact force of the water to prevent the water from being sprayed out from the right end of the spray pipe 2 in a large area, because of the smaller sectional area of the throat pipe 1, the smaller sectional areas of the spray holes 2-1 and the baffle spray holes 3-1, the whole flow passage of the groove building tool forms an organ pipe cavitation jet structure, water is sprayed out from the spray holes 2-1 and the baffle spray holes 3-1 to erode and dissolve rock salt with high-speed water flow, simultaneously plays a role of stirring fluid, avoids the recrystallization caused by overhigh concentration of brine of a solid-liquid two-phase interface, therefore, the time for building the groove is shortened, saturated brine is formed after rock salt is dissolved by water, and the saturated brine pushes the semicircular separation blade 3 of the groove building tool on the horizontal well to enter a common oil pipe for discharging.
In step S4, the distance that coiled tubing is lifted out of the horizontal butt well is no more than two meters, and if the groove building tool is located in the middle of the horizontal section, the distance that coiled tubing is lifted out of the horizontal butt well is smaller than the distance that coiled tubing is lifted out of the horizontal butt well when the groove building tool is located at both ends of the horizontal section.
A groove building tool for rock salt solution mining comprises a throat pipe 1 and a spray pipe 2, one end of the spray pipe 2 is connected with the throat pipe 1 in a welding mode, the inner diameter of the throat pipe 1 is 40mm, the inner diameter of the spray pipe 2 is 50mm, the inner wall of the other end of the spray pipe 2 shrinks to form a step surface, the outer wall is connected with the inner wall in an arc convergence mode, a trapezoidal cross beam 2-3 is arranged on the end face of the shrinking inner wall, pin shaft holes 2-2 are formed in the positions, close to the pipe wall symmetry of the trapezoidal cross beam 2-3, semicircular separation blades 3 are connected with the pin shaft holes 2-2 through pin shafts 4, the pin shafts 4 are fixed and sealed through welding, two semicircular separation blades 3 are provided and form a hinge structure with the pin shafts 4, the semicircular separation blades 3 can flexibly rotate in the spray pipe 2 and are limited by the step surface and limiting blocks 3-2 in front and rear positions, when the two semicircular separation blades 3 are in a rear position state, namely the limiting blocks 3-2 on the semicircular separation blades 3 are contacted together, the arc top distance of the two semicircular baffle plates 3 is close to the inner diameter of the throat pipe 1, and the arc top distance is 35 mm.
The sealing gasket 5 comprises a first sealing gasket for blocking the semicircular blocking piece 3, the first sealing gasket is connected with the spray pipe 2 and is adhered to the position of the step surface, a second sealing gasket is arranged between the pin shaft 4 and the trapezoidal cross beam 2-3, and the second sealing gasket is adhered to the inner side of the trapezoidal cross beam 2-3 and is used for sealing a gap at the joint position of the semicircular blocking piece 3 and the pin shaft 4 and providing a certain supporting effect.
The semicircular baffle 3 is provided with a baffle orifice 3-1 and a limiting block 3-2, and the aperture is 8 mm.
12 spray holes 2-1 are uniformly arranged around the pipe wall of the spray pipe 2, and the aperture is 8 mm. The water flow flows to the groove building tool on the continuous oil pipe from the continuous oil pipe, the two semicircular separation blades 3 are impacted by the water flow from the left side, the limiting blocks 3-2 on the semicircular separation blades 3 are not contacted with each other any more, but are flushed to be tightly attached to the sealing gasket 5 by the water flow along with the semicircular separation blades 3, 180 degrees are formed between the two semicircular separation blades 3, the outlet at the right end of the spray pipe 2 is completely blocked, the water flow is only sprayed out from the spray holes 2-1 and the separation blade spray holes 3-1 due to being blocked in the spray pipe 2, rock salt is eroded and dissolved to form saturated brine, the saturated brine is in a full brine state due to continuous injection of the water flow, and the excessive saturated brine can impact the semicircular separation blade 3 of the same groove building tool on the common oil pipe to enter the common oil pipe to be discharged, so that the two semicircular separation blades 3 are not tightly attached to the sealing gasket 5 any more, but close together, the limiting blocks 3-2 on the semicircular retaining pieces 3 are tightly contacted together.
When in use, the groove building tool is connected with an oil pipe in a welding mode, a cavitation structure is formed at the position of the throat pipe 1, and an organ pipe self-vibration cavitation jet structure is formed because the total area of the spray holes 2-1 and the baffle spray holes 3-1 is smaller than the inner diameter sectional area of the throat pipe 1. The cavitation jet action principle is as follows: the corrosion principle of cavitation. The mechanical impact of cavitation generally has great influence on the corrosion of objects, and the impact effect is more obvious due to the corrosion effect, so that the impact strength of high-pressure water jet ejected by a high-pressure cleaning machine is possibly lower than the mechanical strength of the acted objects. The advantages of cavitation jets are as follows:
the working pressure required by the hard article is greatly reduced.
And the service life of the spray pipe 2 and other high-pressure components is prolonged.
Thirdly, the kerf is much wider than the continuous jet, which is an advantage for surface cleaning.
And fourthly, the performance of the underwater jet is improved compared with that of the underwater continuous jet.
Flow rate is about 10 times larger than that of continuous jet flow.
The inner diameters of both sides of the throat pipe 1 are gradually increased to be in an open shape compared with the inner diameter of the middle part. The open shape can reduce the flow of water flow, but can enhance the impact force of the water flow and better erode and dissolve rock salt.
The working principle of the invention is as follows: the horizontal butt well is filled with water, two semicircular separation blades 3 are separated and tightly attached to a sealing gasket 5 under the impact action of water flow in a continuous oil pipe, an organ pipe cavitation jet structure is formed in the whole flow channel of the groove building tool due to the smaller cross section area of a throat pipe 1 and the smaller total cross section areas of a spray hole 2-1 and a separation blade spray hole 3-1, high-speed fluid sprayed out of the spray hole 2-1 and the separation blade spray hole 3-1 erodes and dissolves rock salt, the effect of stirring the fluid is achieved, recrystallization caused by overhigh concentration of brine at a solid-liquid two-phase interface is avoided, and the groove building time is shortened; the coiled tubing is provided with a pump, saturated brine is pushed away by two semicircular separation blades 3 of a groove building tool arranged on a common oil tube of the horizontal well through pumping pressure, limiting blocks 3-2 on the two semicircular separation blades 3 are collided together, the brine is discharged to the ground through the common oil tube, an oil sleeve annulus is closed, so that the brine cannot flow outside the oil tube, when the concentration of the brine at an outlet is reduced, the coiled tubing is lifted, so that the groove building tool retreats for a certain distance, a larger cavity channel is repeatedly formed at the section of the horizontal well, the oil tube and the groove building tool do not need to be lifted after groove building is completed, the pump is directly started for production, and the purposes of cost reduction and efficiency improvement are achieved; in the mining stage, fresh water is injected into the horizontal butt joint well, saturated brine is discharged from the horizontal well, the horizontal section on the side of the horizontal butt joint well is fast in corrosion, the horizontal butt joint well and the horizontal well need to be exchanged regularly, the middle part of the horizontal section is slow in corrosion for a long time, the discharge capacity of a groove building tool can be increased when the groove building tool is arranged in the middle of the horizontal section in a groove building period, a larger cavity channel is formed in the middle, and a salt layer is gradually corroded from bottom to top to form a more uniform salt cavity due to the dissolution property of rock salt, so that the recovery rate of rock salt ore is improved.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A matched mining process for rock salt solution mining is characterized in that: the method comprises the following steps:
s1: drilling a horizontal well at the bottom of the salt layer, drilling a horizontal butt well on the other side, and then butting a well bore of the horizontal well;
s2: a common oil pipe is welded with a groove building tool and is put into the bottom of a horizontal well, a continuous oil pipe is welded with the groove building tool and is put into the bottom of a horizontal butt well, and meanwhile, the groove building tool on the common oil pipe and the groove building tool on the continuous oil pipe have an interval which is convenient for rock salt solution mining, and the groove building tool on the common oil pipe and the groove building tool on the continuous oil pipe are positioned on the same horizontal plane, so that brine can flow in the horizontal direction conveniently;
s3: horizontally butting a well for water injection, forming cavitation jet flow by high-pressure water flow under the action of a grooving tool to erode and dissolve rock salt to form saturated brine, pushing the saturated brine away a semicircular separation blade (3) of the grooving tool on the horizontal well, and discharging the saturated brine from a common oil pipe;
s4: when the brine concentration in a common oil pipe is reduced, the coiled tubing needs to be lifted out of the horizontal butt-joint well for a certain distance, then the continuous erosion and dissolution are carried out, and the circulation is carried out until a groove building tool on the coiled tubing reaches the tail end of the horizontal butt-joint well;
s5: and continuing to start the pump for production, adjusting the water flow injected into the horizontal butt joint well according to the outlet brine concentration so as to control the concentration of the discharged brine until the degree of saturated brine is reached, and regularly exchanging the horizontal well and the horizontal butt joint well until the designed exploitation amount is reached.
2. The matched mining process for rock salt solution mining as claimed in claim 1, wherein the matched mining process comprises the following steps: in step S1, the horizontal section of the horizontal well is shorter than the horizontal section of the horizontally butted well.
3. The matched mining process for rock salt solution mining as claimed in claim 1, wherein the matched mining process comprises the following steps: in the step S3, water enters from the left end of a throat pipe (1) of a groove building tool on a horizontal butt well and is sprayed on a semicircular baffle plate (3), the semicircular baffle plate (3) is tightly attached to a sealing gasket (5) under the impact force of the water to prevent the water from being sprayed out from the right end of a spray pipe (2) in a large area, the whole flow passage of the groove building tool forms an organ pipe cavitation jet structure due to the smaller sectional area of the throat pipe (1), the smaller sectional areas of a spray hole (2-1) and a baffle spray hole (3-1), the water is sprayed out from the spray hole (2-1) and the baffle spray hole (3-1) to erode and dissolve rock salt by high-speed water flow, the effect of stirring fluid is achieved at the same time, the phenomenon that the solid-liquid two-phase interface brine is too high in concentration to generate recrystallization is avoided, the groove building time is shortened, saturated brine is formed after the rock salt is dissolved, and the saturated brine pushes away the semicircular baffle plate (3) of the groove building tool on the horizontal well, and the mixture enters a common oil pipe to be discharged.
4. A process as claimed in claim 3, wherein the process comprises: in the step S4, the distance that the coiled tubing is lifted out of the horizontal butt well is not more than two meters, and if the groove building tool is located in the middle of the horizontal section, the distance that the coiled tubing is lifted out of the horizontal butt well is smaller than the distance that the coiled tubing is lifted out of the horizontal butt well when the groove building tool is located at the two ends of the horizontal section.
5. The utility model provides a groove instrument of building of rock salt solution mining which characterized in that: the device comprises a throat pipe (1) and a spray pipe (2), wherein the throat pipe (1) is fixedly connected with the spray pipe (2), the spray pipe (2) is provided with a pin shaft hole (2-2), a semicircular blocking piece (3) is connected with the pin shaft hole (2-2) through a pin shaft (4), and the arc top distance of the semicircular blocking piece (3) is close to the inner diameter of the throat pipe (1);
the sealing gasket (5) comprises a first sealing gasket used for blocking the semicircular blocking piece (3), and the first sealing gasket is connected with the spray pipe (2).
6. A tool for trenching rock salt solution mining as claimed in claim 5 wherein: and a second sealing gasket is arranged between the pin shaft (4) and the trapezoidal cross beam (2-3).
7. A tool for trenching rock salt solution mining as claimed in claim 5 wherein: the semicircular baffle (3) is provided with a baffle orifice (3-1) and a limiting block (3-2).
8. A tool for trenching rock salt solution mining as claimed in claim 5 wherein: and spray holes (2-1) are uniformly formed around the pipe wall of the spray pipe (2).
9. A trench building tool for rock salt solution mining as claimed in claim 8, wherein: the total area of the spray holes (2-1) and the baffle plate spray holes (3-1) is smaller than the inner diameter sectional area of the throat pipe (1), and an organ pipe self-vibration cavitation jet structure is formed.
10. A trench building tool for rock salt solution mining as claimed in claim 9, wherein: the inner diameters of the two sides of the throat pipe (1) are gradually increased to form an open shape compared with the inner diameter of the middle part.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246273A (en) * | 1991-05-13 | 1993-09-21 | Rosar Edward C | Method and apparatus for solution mining |
| RU2038469C1 (en) * | 1992-05-25 | 1995-06-27 | Научно-технический центр по подземному хранению газонефтепродуктов и захоронению промышленных отходов | Method of joining wells in soluble rock beds |
| CN201991514U (en) * | 2011-01-20 | 2011-09-28 | 中国石油化工股份有限公司 | Pulse jet device for quick channel construction in salt layers |
| CN102828777A (en) * | 2012-09-19 | 2012-12-19 | 重庆大学 | Double-vertical shaft horizontal butt joint salt cavern deposit construction method |
| CN107143320A (en) * | 2017-06-16 | 2017-09-08 | 刘杰 | Liquid stream cavitation device, liquid stream cavitation system and liquid stream cavitation process |
| US9995127B1 (en) * | 2015-09-22 | 2018-06-12 | Geodrilling Technologies, Inc. | Low-frequency pulsing sonic and hydraulic mining method |
| CN109184693A (en) * | 2018-09-06 | 2019-01-11 | 四川盐业地质钻井大队 | The old mining area old well production potential tapping technique of rock salt |
| CN110159244A (en) * | 2019-05-10 | 2019-08-23 | 刘森林 | Sylvite ore solution mining method |
| CN112227985A (en) * | 2020-10-12 | 2021-01-15 | 中国科学院武汉岩土力学研究所 | Ultra-deep salt mine butt-joint well bittern-mining full-horizontal-section groove expanding method |
-
2022
- 2022-01-14 CN CN202210042313.8A patent/CN114412431B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246273A (en) * | 1991-05-13 | 1993-09-21 | Rosar Edward C | Method and apparatus for solution mining |
| RU2038469C1 (en) * | 1992-05-25 | 1995-06-27 | Научно-технический центр по подземному хранению газонефтепродуктов и захоронению промышленных отходов | Method of joining wells in soluble rock beds |
| CN201991514U (en) * | 2011-01-20 | 2011-09-28 | 中国石油化工股份有限公司 | Pulse jet device for quick channel construction in salt layers |
| CN102828777A (en) * | 2012-09-19 | 2012-12-19 | 重庆大学 | Double-vertical shaft horizontal butt joint salt cavern deposit construction method |
| US9995127B1 (en) * | 2015-09-22 | 2018-06-12 | Geodrilling Technologies, Inc. | Low-frequency pulsing sonic and hydraulic mining method |
| CN107143320A (en) * | 2017-06-16 | 2017-09-08 | 刘杰 | Liquid stream cavitation device, liquid stream cavitation system and liquid stream cavitation process |
| CN109184693A (en) * | 2018-09-06 | 2019-01-11 | 四川盐业地质钻井大队 | The old mining area old well production potential tapping technique of rock salt |
| CN110159244A (en) * | 2019-05-10 | 2019-08-23 | 刘森林 | Sylvite ore solution mining method |
| CN112227985A (en) * | 2020-10-12 | 2021-01-15 | 中国科学院武汉岩土力学研究所 | Ultra-deep salt mine butt-joint well bittern-mining full-horizontal-section groove expanding method |
Non-Patent Citations (1)
| Title |
|---|
| 沈忠厚, 曾春元: "常压下淹没自激空化喷嘴的试验研究", 石油天然气学报, no. 02, 30 June 1989 (1989-06-30) * |
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| CN114412431B (en) | 2024-03-15 |
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