CN120312125B - A casing centralizer and its installation method for in-situ leaching mining of sandstone uranium deposits - Google Patents
A casing centralizer and its installation method for in-situ leaching mining of sandstone uranium depositsInfo
- Publication number
- CN120312125B CN120312125B CN202510745536.4A CN202510745536A CN120312125B CN 120312125 B CN120312125 B CN 120312125B CN 202510745536 A CN202510745536 A CN 202510745536A CN 120312125 B CN120312125 B CN 120312125B
- Authority
- CN
- China
- Prior art keywords
- casing
- centralizer
- sealing layer
- buckle
- end buckle
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The application provides a casing centralizer and an installation method for sandstone uranium ore in-situ leaching exploitation, wherein the centralizer is sleeved on the casing, the casing centralizer comprises end buckles, guide support parts and step 1, wherein a casing installation channel is formed in the middle of each end buckle, the guide support parts are uniformly arranged between the end buckles around the installation channel, the guide support parts are arranged at equal intervals, the step 1 is used for determining the installation position of the centralizer on the casing, the step 2 is used for installing the centralizer, and the step 21 is used for installing a fixed ring buckle at the end buckle and sleeving the centralizer into the casing installation position under the condition that a sealing layer is not deformed.
Description
Technical Field
The embodiment of the application relates to the technical field of in-situ leaching uranium mining engineering, in particular to a casing centralizer for in-situ leaching uranium mining of sandstone and an installation method.
Background
The centralizer is mainly used for ensuring that the casing is centered in the shaft, and is contacted with the well wall through elastic or rigid centralizing wings to form uniform supporting force, so that the casing is prevented from shifting or rotating, meanwhile, friction between the casing and the well wall is reduced, the service life of the casing is prolonged, and the cementing quality of cement paste is improved.
In the practice of in-situ leaching uranium mining engineering, the reliability of the centralizer directly influences the well quality and the subsequent development effect. The existing simple welded steel bar centralizer is generally used, the structure of the simple welded steel bar centralizer is in an upper circular ring and a lower circular ring, the simple welded steel bar centralizer is formed by welding a drum-shaped support, the existing simple welded steel bar centralizer is remarkably defective, the problems that the corrosion resistance of materials is poor, the connection stability between the centralizer and a sleeve is poor, a shaft is easy to deviate, the centralizer falls off and the like are solved, and the technological efficiency and the safety of in-situ leaching uranium extraction are severely restricted.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. This section of the invention is not intended to limit the critical and essential features of the claimed subject matter, nor is it intended to be used as an attempt to determine the scope of the claimed subject matter.
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the invention provides a casing centralizer for sandstone uranium ore in-situ leaching production, the centralizer being fitted over the casing, comprising:
the middle part of the end buckle is provided with a sleeve mounting channel;
the guide support parts are uniformly arranged between the end buckles around the mounting channel, and the guide support parts are arranged at equal intervals between adjacent guide support parts;
The fixed ring buckle is connected with one side of the end buckle, which is far away from the diversion supporting part;
the end buckle comprises a sleeve, and is characterized in that a sealing layer is arranged on the inner circumferential surface of the end buckle, and when the fixed ring buckle moves towards the inside of the end buckle, the fixed ring buckle can compress part of the sealing layer so that the sealing layer is attached to the sleeve, and the sealing layer is made of a water swelling material.
Optionally, the sealing layer is water-swellable rubber.
Optionally, the guide support part is in a spiral angle structure and is arranged between the end buckles.
Optionally, an included angle between the diversion supporting part and the end buckle plane is 45 degrees.
Optionally, the longitudinal section of the diversion support part is in a parabolic shape, and round corners are arranged between the two ends of the diversion support part and the end buckles.
Optionally, the cross section of the flow guiding supporting belt is of a central flat-top type reducing flow passage structure, and slope type gradual flow belts are arranged on two sides of the flow guiding supporting belt.
Optionally, the width of the slope gradual change flow belt is 3mm-7mm.
Optionally, the end buckle and the inner wall surface of the diversion supporting part are provided with honeycomb structures.
Optionally, the end buckle is in threaded connection with the fixed ring buckle.
The second aspect of the invention provides a method for installing a casing centralizer for sandstone uranium deposit in-situ leaching exploitation, comprising:
step 1, determining the installation position of a centralizer on a casing;
step 2, installing a centralizer;
step 21, under the condition that the sealing layer is not deformed, mounting the fixed ring buckle at the end buckle, and sleeving the centralizer into the mounting position of the sleeve;
step 22, screwing the fixed ring buckle to enable the fixed ring buckle to compress the sealing layer, and fastening the centralizer to the outer side of the casing;
And 3, running the casing with the centralizer into the well bore.
Compared with the prior art, the well cementing device at least has the advantages that the sealing layer is arranged in the end buckle, so that the fixation in the ground surface and the well shaft can be realized, the lamination and the fixation stability of the centralizer and the casing are improved, the diversion supporting part is arranged between the end buckles, the casing running resistance can be reduced, and the well cementing quality is ensured.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a perspective view of a first embodiment of the present application;
FIG. 2 is a perspective view of a second embodiment of the present application;
FIG. 3 is a side view block diagram provided by the present application;
fig. 4 is a top view of the structure provided by the present application.
The correspondence between the reference numerals and the component names in fig. 1 is:
1. end buckles, 2, a diversion supporting part, 3, a fixed ring buckle and 4, a sealing layer.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these specific details.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be appreciated that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.
Referring to fig. 1-4, a casing centralizer for sandstone uranium deposit in-situ leaching exploitation according to some embodiments of the present application, the casing centralizer being sleeved on the casing, includes:
the end buckle 1 is provided with a sleeve mounting channel in the middle of the end buckle 1;
The guide support parts 2 are uniformly arranged between the end buckles 1 around the mounting channel, and the guide support parts 2 are arranged at equal intervals between adjacent guide support parts 2;
The fixing ring buckle 3 is connected with one side, away from the diversion supporting part 2, of the end buckle 1;
The inner circumferential surface of the end buckle 1 is provided with a sealing layer 4, and when the fixed ring buckle 3 moves towards the end buckle 1, the fixed ring buckle 3 can press part of the sealing layer 4, so that the sealing layer 4 is attached to the sleeve, and the sealing layer 4 is made of a water swelling material.
Specifically, the centralizer includes end knot 1, water conservancy diversion supporting part 2, fixed ring knot 3 and sealing layer 4, end knot 1 is the ring dress structure, install the passageway in its inside, a plurality of water conservancy diversion supporting parts 2 encircle in the installation passageway outside, and evenly distributed is between end knot 1, the installation passageway is used for installing the sleeve pipe, realize installing the centralizer in the sleeve pipe outside, sealing layer 4 is located the inboard of end knot 1, it is water-swellable rubber materials preparation, before the sleeve pipe is gone into the pit shaft, the operating personnel can embolia the sleeve pipe with the centralizer, and install fixed ring knot 3 on the end knot 1, be in unexpanded state with the centralizer removal to the mounted position department on the sleeve pipe at sealing layer 4, rotate fixed ring knot 3 at this moment and can realize extrusion sealing layer 4, can make sealing layer 4 hug closely on the sleeve pipe outer circumference, realize preliminary fixation. After the casing is put into the well bore and contacted with formation water, the sealing layer 4 can swell when meeting water, and the pressure generated by swelling enables the sealing layer 4 to be further tightly attached in a gap between the casing and the centralizer, so that the connection strength of the centralizer and the casing is enhanced, the axial sliding of the casing is effectively inhibited, a reliable sealing barrier is formed, annulus leakage is prevented, leaching liquid is prevented from leaking in the annulus, and the normal operation of an in-situ leaching uranium mining process is ensured. Meanwhile, the expansion characteristic of the sealing layer 4 has a certain buffer effect, so that vibration and impact generated in the well bore operation process can be absorbed, damage to the casing is reduced, and the service life of the casing is prolonged.
The end buckle 1 and the diversion support part 2 are manufactured in an integral structure, and are manufactured by adopting a 70% polypropylene and 30% glass fiber composite formula, so that the end buckle is good in corrosion resistance, can resist corrosion of various chemical substances, including acid, alkali, salt and the like, is suitable for working environments which are possibly contacted with various chemical substances, and prolongs the service lives of the end buckle 1 and the diversion support part 2.
Wherein, install sealing layer 4 on the internal face of end knot 1 and 20mm department from the end knot 1 outer terminal surface, fixed ring knot 3 can get into the end knot 1 internal face and 22mm-24mm department from the end knot 1 outer terminal surface, therefore when installing fixed ring knot 3 to the bottom, fixed ring knot 3 can extrude sealing layer 4, can make sealing layer 4 hug closely on the sleeve pipe outer circumference, realizes fixing centralizer on the sleeve pipe.
The sealing layer 4 is water-swellable rubber.
Specifically, when the water-swelling rubber is used as the material of the sealing layer 4, water can be quickly absorbed and volume swelling occurs after the water-swelling rubber contacts water, the volume of the water-swelling rubber can be 2-3 times of the original volume after the water-swelling rubber contacts water, and the sealing layer 4 can automatically fill a tiny gap between the casing and the centralizer after the water-swelling rubber contacts water in a shaft through swelling characteristics, so that a tight sealing structure is formed, the water-swelling rubber can be firmly fixed with the casing, axial sliding is effectively restrained, and annular leakage is effectively prevented.
In the process of installing the casing centralizer, the sealing layer 4 is in an initial state when not meeting water, and has good plasticity and flexibility at the moment, so that an operator can conveniently sleeve the centralizer into the casing. When the fixed ring buckle 3 moves into the end buckle 1 and compresses part of the sealing layer 4, the sealing layer 4 is primarily attached to the surface of the sleeve under the action of pressure, so that the primary fixation of the centralizer and the sleeve is realized. The preliminary fixation can prevent the centralizer from sliding on the casing before the casing is run in, ensure that the centralizer is in an installed position and ready for subsequent wellbore operations. After the casing is run into the wellbore, the sealing layer 4 is in contact with the formation water, and as the water is continuously absorbed, the sealing layer 4 gradually expands, and the increase in volume thereof generates strong pressure, so that the sealing layer 4 is further tightly pressed between the casing and the inner circumferential surface of the end button 1. The expansion pressure not only enhances the connection strength of the centralizer and the casing, effectively inhibits the axial sliding of the casing, but also forms a reliable sealing barrier between the casing and the centralizer to prevent leaching liquid from leaking in the annulus.
The diversion support part 2 is arranged between the end buckles 1 in a spiral angle structure.
The included angle between the diversion supporting part 2 and the plane of the end buckle 1 is 45 degrees.
Specifically, the guide support portion 2 is disposed between the end buckles 1 in a spiral angle structure, and spirally extends around the sleeve mounting channel at a specific angle (e.g., 45 °), so as to form a continuous and regular guide channel. When the casing is lowered into the well bore, the solid-liquid mixture in the well bore is guided by the helix angle to generate a spiral flow along the curved surface of the diversion support part 2. The spiral flow mode effectively reduces the local resistance of the fluid, and compared with the traditional flow vertical or parallel to the casing, the spiral flow reduces the impact force of the fluid on the casing, so that the casing can be more stably embedded. Meanwhile, the contact area of the fluid and the diversion support part 2 is increased by the spiral angle structure, so that the fluid can be more uniformly distributed around the sleeve, and uneven stress of the sleeve caused by too high or too low local fluid flow speed is avoided. The spiral diversion support part 2 has a certain guiding function on the sleeve, so that the sleeve can better keep a centering state in the process of being put down, and the resistance generated by the sleeve deviation and the well wall collision is reduced. The effect of reducing the resistance not only improves the efficiency of casing running, but also reduces the abrasion to the casing and the centralizer, and prolongs the service life of the equipment.
In the well cementation stage, cement paste is evenly distributed along the spiral channel of the diversion support part 2 after being injected into the well shaft, so that segregation phenomenon of the cement paste around the casing is avoided. Due to the lack of an effective diversion design, cement paste is easy to accumulate at certain positions, and insufficient filling is caused at other positions, so that the well cementation quality is affected. The spiral angle structure enables cement paste to form a uniform annular wrapping layer around the sleeve, so that the connection strength between the sleeve and the stratum is enhanced, and the sealing property and stability of well cementation are improved. In addition, when the operation of windowing under the pit shaft, the diversion support part 2 of the spiral angle structure can provide stable support for the sleeve, and the shearing load and the pressure fluctuation generated in the operation of windowing are dispersed, so that the sleeve is prevented from being deformed or damaged due to uneven stress, and the smooth proceeding of the subsequent process of in-situ uranium leaching is ensured.
The longitudinal section of the diversion support part 2 is in a parabolic shape, and round corners are arranged between the two ends of the diversion support part and the end buckles 1.
Specifically, the parabolic shape of the longitudinal section of the flow guiding support part 2 and the rounded corner design of the two ends play roles in optimizing the fluid flow characteristic, reducing the casing running resistance, enhancing the structural stability and the like, and the parabolic curve has smooth and continuous characteristics, so that the flow of the solid-liquid mixture can be guided more effectively compared with the traditional plane or simple curved surface. When the casing is put into the well, the mixed fluid such as drilling fluid, stratum debris and the like in the well naturally accelerates to flow along the curved surface when contacting with the paraboloid of the diversion support part 2, so that a smooth streamline track is formed. The flow mode greatly reduces the local resistance and turbulence degree of the fluid, and reduces the impact force and pressure fluctuation of the fluid on the sleeve. The parabolic shape can also keep stable flow velocity distribution of fluid in the flowing process, avoid fluid separation phenomenon caused by abrupt change of flow velocity, and effectively prevent vortex areas from occurring around the sleeve, so that resistance loss caused by unstable fluid in the sleeve falling process is reduced, and the sleeve can be more stably and efficiently fallen into a preset position.
The round corner structures arranged between the two ends of the diversion support part 2 and the end buckles 1 can enable fluid to realize smooth transition when entering and leaving the diversion support part 2, reduce the local Reynolds number of the fluid and effectively inhibit the turbulent flow phenomenon of the fluid. In the process of casing running, the round corner structure is favorable to guiding the fluid to be distributed around the casing more uniformly, and uneven casing stress caused by concentrated impact of the fluid on a certain part is avoided, so that the stability and safety of casing running are improved. In the well cementation stage, when the cement paste passes through the diversion support part 2, the round corner structure can also ensure the stable flow of the cement paste, prevent the segregation or blockage of the cement paste caused by unsmooth flow, ensure that the cement paste can be uniformly filled between the sleeve and the well wall, and enhance the sealing performance and the overall strength of well cementation.
The cross section of the flow guiding support part 2 is of a central flat-top type flow reducing channel structure, and slope type gradual flow belts are arranged on two sides of the flow guiding support part.
The width of the gradient gradual change flow belt is 3mm-7mm.
Specifically, the central flat-top type flow reducing channel structure of the diversion support part 2 and slope type gradual flow belts at two sides of the flow reducing channel structure form a stable main flow channel, so that the solid-liquid mixed fluid in a shaft can keep relatively stable flow speed and flow direction when flowing through the diversion support belt, and turbulence and energy loss caused by abrupt change of the flow channel are avoided. Along with the gradual shrinkage of the flow channel, the fluid naturally accelerates in the flowing process, so that a high-efficiency fluid conveying effect is formed. And the fluid between the central flow channel and the well wall is guided and transited by the slope gradual flow belt with the width of 3mm-7mm at the two sides. The narrow flow band width can ensure effective guiding of fluid, and can not occupy too much space between the casing and the well wall, so that smoothness of casing running is prevented from being influenced by the too wide flow band. The gradient gradually changed form ensures that the fluid can smoothly diffuse from the central flow channel to the well wall, thereby effectively avoiding the formation of vortex or dead angle of the fluid at the edge of the flow channel, reducing local resistance, ensuring that the fluid distribution around the sleeve is more uniform, reducing the uneven acting force of the fluid on the sleeve, and improving the stability of the sleeve in the process of being put into.
Wherein, the width of slope formula gradual change flow area is 5mm.
The end buckle 1 and the inner wall surface of the diversion support part 2 are provided with honeycomb structures.
Specifically, by providing the honeycomb structure on the inner walls of the end buckle 1 and the flow guiding support part 2, the overall weight can be effectively reduced.
The end buckle 1 is in threaded connection with the fixed ring buckle 3.
Specifically, the end buckle 1 is in threaded connection with the fixed ring buckle 3, so that the compaction degree of the sealing layer 4 can be adjusted by rotating the fixed ring buckle 3, before the casing is put into the shaft, the sealing layer 4 is deformed by screwing the fixed ring buckle 3, the casing can be extruded inwards, the centralizer can be fastened on the casing, and when the centralizer needs to be dismantled, the centralizer can be released from the casing by screwing the fixed ring buckle 3 to be separated from the end buckle 1.
The application provides a method for installing a casing centralizer for sandstone uranium deposit on-site leaching exploitation, which comprises the following steps:
step 1, determining the installation position of a centralizer on a casing;
Specifically, the installation position comprises a first setting position, a second setting position and a third setting position, and the first setting position is arranged above the casing windowing position and closest to the pipe hoop, and has the functions of inhibiting dynamic shear load and axial pressure fluctuation generated by cutting/perforating operation and reducing the influence of the well casing windowing operation on the casing stability;
Sequentially setting a second setting position upwards by taking the first setting position as a reference and taking 80m as a reference until the heights of the placed tail end centralizer and the sleeve orifice are less than 80 m;
And a third setting position of the centralizer is arranged at the lower end pipe hoop of the windowing position of the sleeve and is used for resisting compression of the sleeve and preventing radial displacement of the lower sleeve caused by windowing operation.
Step 2, installing a centralizer;
step 21, under the condition that the sealing layer is not deformed, mounting the fixed ring buckle at the end buckle, and sleeving the centralizer into the mounting position of the sleeve;
Specifically, according to the installation position, the centralizer is sleeved on the corresponding sleeve from the male buckle end of the sleeve, the fixed ring buckle 3 is screwed into the end buckle 1, the inside of the screwed end buckle 1 does not exceed 20mm, and under the condition that the sealing layer 4 is not deformed, the position of the centralizer is moved and adjusted, and the centralizer is moved to a first setting position, a second setting position and a third setting position respectively.
Step 22, screwing the fixed ring buckle to enable the fixed ring buckle to compress the sealing layer, and fastening the centralizer to the outer side of the casing;
specifically, the fixing ring buckle 3 is screwed to enter the end buckle 122mm-24mm, and the sealing layer 4 is pressed to fasten the centralizer at the first set position, the second set position and the third set position of the outer circumference of the casing.
And 3, running the casing with the centralizer into the well bore.
Specifically, the casing is put into the well bore, and after the casing is put into the well bore, the sealing layer 4 of the inner wall of the centralizer swells when meeting water and is fixed on the casing.
Example 1
A sandstone in-situ uranium leaching ore development project adopts a secondary well forming process to build a well, wherein one drilling hole is used for determining that the running length of a casing is 420m according to the result of a bare Kong Cejing, and the cutting position is at the depth of 407.5-412.5m.
Step 1, determining the installation position of a centralizer on a casing;
firstly, according to a sleeve windowing (cutting) position (407.5-412.5 m), determining a first setting position above the windowing position to be at a sleeve pipe hoop (406 m);
setting a second set position by taking the first set position upwards every 80m as a reference, and determining that the second set position is respectively at depths 326m, 246m, 186m, 106m and 26 m;
and according to the windowing position of the sleeve, determining that a third setting position below the windowing position is at the position of the nearest pipe hoop below, and the depth is 414 m.
Step 2, installing a centralizer;
And sleeving the centralizer into the corresponding section of sleeve from the male buckle end of the sleeve according to the design position, screwing the end buckle 1 into the centralizer matrix for 20mm before installation, and moving the position of the centralizer to each installation position under the condition that the rubber is not deformed.
The end buckles 1 at the two ends of the centralizer are screwed clockwise, the end buckles 1 are screwed into the matrix 22mm-24mm, the sealing layer 4 is pressed tightly to fasten the centralizer to the periphery of the casing, and the operation is performed on the centralizer at each different position.
Step 3, the casing pipe provided with the centralizer is put into a shaft;
and (3) the casing is put in, after the casing is put in, the sealing layer 4 in the centralizer swells when meeting water, the casing is fixed, and the installation of the centralizer is completed.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, the term "plurality" then referring to two or more unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510745536.4A CN120312125B (en) | 2025-06-05 | 2025-06-05 | A casing centralizer and its installation method for in-situ leaching mining of sandstone uranium deposits |
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| CN202510745536.4A CN120312125B (en) | 2025-06-05 | 2025-06-05 | A casing centralizer and its installation method for in-situ leaching mining of sandstone uranium deposits |
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| CN112127800B (en) * | 2020-09-17 | 2022-04-08 | 西南石油大学 | A casing device for reducing shear deformation of casing and using method thereof |
| CN214273550U (en) * | 2020-12-23 | 2021-09-24 | 重庆芃元科技有限公司 | Integral elastic cyclone centralizer |
| CN114086898B (en) * | 2022-01-17 | 2022-03-29 | 山东健源石油工程技术有限公司 | Casing centralizer for well cementation construction and method |
| CN114541984B (en) * | 2022-03-10 | 2023-07-21 | 中国石油大学(北京) | A rubber expandable casing centralizer for horizontal wells |
| CN116658115A (en) * | 2023-06-14 | 2023-08-29 | 核工业北京化工冶金研究院 | Sandstone uranium ore well cementation packing method |
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