CN112647929A - Experimental device for be used for detecting pit shaft deposit - Google Patents
Experimental device for be used for detecting pit shaft deposit Download PDFInfo
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- CN112647929A CN112647929A CN201910964526.4A CN201910964526A CN112647929A CN 112647929 A CN112647929 A CN 112647929A CN 201910964526 A CN201910964526 A CN 201910964526A CN 112647929 A CN112647929 A CN 112647929A
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- 238000007789 sealing Methods 0.000 claims description 42
- 238000012360 testing method Methods 0.000 claims description 27
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims description 2
- 230000008021 deposition Effects 0.000 abstract description 21
- 239000010720 hydraulic oil Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 238000000429 assembly Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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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
- E21B47/00—Survey of boreholes or wells
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- Geochemistry & Mineralogy (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to an experimental device for detecting shaft deposition, which comprises a shaft assembly, wherein the shaft assembly comprises a wide-diameter shaft barrel part and a narrow-diameter shaft barrel part, the inner diameter of the narrow-diameter shaft barrel part is smaller than that of the wide-diameter shaft barrel part, the first end of the wide-diameter shaft barrel part and the first end of the narrow-diameter shaft barrel part are butted together along the axial direction, and a variable-diameter part is formed inside the joint between the wide-diameter shaft barrel part and the narrow-diameter shaft barrel part, wherein experimental fluid can flow into the shaft assembly along the axial direction and flow through the variable-diameter part. The experimental device can be used for detecting the deposition condition of the variable diameter part of the shaft.
Description
Technical Field
The invention relates to the technical field of underground safety guarantee, in particular to an experimental device for measuring shaft deposition.
Background
At present, a series of researches are carried out at home and abroad aiming at the phase state change generated in the wellbore multiphase flow under different working conditions. For example, when a fluid flows in a well, there may be a special phase change due to many reasons such as temperature, pressure, etc., such as precipitation of wax crystals and formation of hydrate particles. These changes tend to make the fluid viscous, thereby tending to deposit within the wellbore and even cause plugging.
To date, these studies have been conducted primarily for conventional diameter sections. In practice, however, the pipes used in the drilling and production process are not of equal diameter, but are formed by interconnecting wellbores of different sizes. The junction between wellbores of different sizes may produce a change in internal diameter, referred to herein as a "variable diameter portion". Deposition of the above-mentioned waxy crystals or hydrate particles and the like is more likely to occur at such junctions. These deposits can affect the ability of fluids to flow within the wellbore, making the wellbore susceptible to plugging, preventing normal production operations from occurring, and even causing serious accidents and losses.
It is therefore desirable to provide a test apparatus that can detect the deposition of a variable diameter portion of a wellbore.
Disclosure of Invention
In order to solve the problems, the invention provides an experimental device which can be used for detecting the deposition condition of the variable diameter part of a shaft.
According to the invention, the experiment device for detecting the shaft sedimentation comprises a shaft assembly, wherein the shaft assembly comprises a wide-diameter shaft barrel part and a narrow-diameter shaft barrel part, the inner diameter of the narrow-diameter shaft barrel part is smaller than that of the wide-diameter shaft barrel part, the first end of the wide-diameter shaft barrel part and the first end of the narrow-diameter shaft barrel part are butted together along the axial direction, and a variable diameter part is formed inside the connection part between the wide-diameter shaft barrel part and the narrow-diameter shaft barrel part, wherein experiment fluid can flow into the shaft assembly along the axial direction and flow through the variable diameter part.
By flowing the test fluid through the variable diameter portion of the wellbore assembly in an axial direction, the condition of the fluid flowing through the variable diameter portion of the wellbore in actual downhole operations can be simulated. The user may inspect and/or observe the wellbore assembly as, or after, the test fluid flows therethrough to determine the deposition within the wellbore assembly, particularly at the variable diameter portion. Based on the detected result, the actual flowing condition of the fluid in the well bore can be effectively predicted when the well is operated underground, and corresponding measures can be taken to avoid the actual blockage in the well bore, particularly the blockage at the reducing part.
In one embodiment, the wide diameter wellbore element and the narrow diameter wellbore element are configured to be removable and installable relative to one another.
In one embodiment, the wide diameter wellbore element is movable in an axial direction proximate to the narrow diameter wellbore element and/or the narrow diameter wellbore element is movable in an axial direction proximate to the wide diameter wellbore element such that the first end of the narrow diameter wellbore element is insertable into the first end of the wide diameter wellbore element.
In one embodiment, a sealing cover plate extending perpendicular to an axial direction of the wide-diameter wellbore member and the narrow-diameter wellbore member is disposed between the wide-diameter wellbore member and the narrow-diameter wellbore member, the sealing cover plate being configured to sealingly engage the first end of the wide-diameter wellbore member and the first end of the narrow-diameter wellbore member to effect a seal between the wide-diameter wellbore member and the narrow-diameter wellbore member.
In one embodiment, a sealing groove is formed on an outer side wall of the first end of the narrow-diameter shaft, and the sealing cover plate is configured to be inserted into the sealing groove to seal with the narrow-diameter shaft.
In one embodiment, the first end of the sealing cover plate is configured to seal with the narrow-diameter wellbore element, the second end of the sealing cover plate is telescopically inserted into a cover plate guide groove, the cover plate guide groove is in communication with a sealing hydraulic passage, the sealing cover plate moves toward the narrow-diameter wellbore element to seal the first end of the sealing cover plate with the narrow-diameter wellbore element when fluid is pumped into the cover plate guide groove through the sealing hydraulic passage, and the sealing cover plate moves away from the narrow-diameter wellbore element to separate the first end of the sealing cover plate from the narrow-diameter wellbore element when fluid is pumped from the cover plate guide groove through the sealing hydraulic passage.
In one embodiment, the experimental apparatus comprises a plurality of narrow-diameter wellbore pieces and a plurality of wide-diameter wellbore pieces, the narrow-diameter wellbore pieces are arranged in an annular radial mode in a first longitudinal plane, the wide-diameter wellbore pieces surround the narrow-diameter wellbore pieces in the first longitudinal plane and are arranged in an annular radial mode, the orientation of the wide-diameter wellbore pieces is different, the orientation of the narrow-diameter wellbore pieces is different, the first end of each narrow-diameter wellbore piece can be inserted into the first end of the wide-diameter wellbore piece opposite to the first end of the narrow-diameter wellbore piece, and a variable diameter portion is formed.
In one embodiment, at least two of the plurality of wide diameter wellbore pieces have different inner diameters relative to one another and/or at least two of the plurality of narrow diameter wellbore pieces have different inner diameters relative to one another.
In one embodiment, the plurality of narrow bore wellbore elements and/or the plurality of wide bore wellbore elements are configured to be rotatable about a center of the arranged annulus.
In one embodiment, the assay device further comprises: a first measurement mechanism mounted on a sidewall of the first end of the wide diameter wellbore element and/or the narrow diameter wellbore element, the first measurement mechanism configured to measure at least one of temperature, pressure, acoustic impedance, and electrical impedance at the first end of the wide diameter wellbore element and/or the narrow diameter wellbore element; and a second measuring mechanism mounted on a bottom wall of the second end of the wide diameter wellbore element and/or the narrow diameter wellbore element, the second measuring mechanism configured to measure at least one of temperature, pressure, acoustic impedance, and electrical impedance at the second end of the wide diameter wellbore element and/or the narrow diameter wellbore element.
Compared with the prior art, the invention has the advantages that: by flowing the test fluid through the variable diameter portion of the wellbore assembly in an axial direction, the condition of the fluid flowing through the variable diameter portion of the wellbore in actual downhole operations can be simulated. The user may inspect and/or observe the wellbore assembly as, or after, the test fluid flows therethrough to determine the deposition within the wellbore assembly, particularly at the variable diameter portion. Based on the detected result, the actual flowing condition of the fluid in the well bore can be effectively predicted when the well is operated underground, and corresponding measures can be taken to avoid the actual blockage in the well bore, particularly the blockage at the reducing part. The annular arrangement and rotation of the plurality of wide-diameter wellbore elements and the plurality of narrow-diameter wellbore elements may allow different wide-diameter wellbore elements to be mated with different narrow-diameter wellbore elements, thereby allowing testing experiments to be performed on a wide variety of wellbores. In addition, the arrangement is also beneficial for carrying out detection experiments on wellbore components with different well angles. In addition, this arrangement is also advantageous for saving experimental space.
Drawings
The invention is described in more detail below with reference to the accompanying drawings. Wherein:
FIG. 1 shows a schematic diagram of an experimental apparatus for detecting wellbore deposition according to one embodiment of the present invention;
FIG. 2 shows a schematic view of the experimental setup for detecting wellbore deposition of FIG. 1 at another angle;
FIG. 3 shows a schematic diagram of an experimental apparatus for detecting wellbore deposition according to one embodiment of the present invention; and is
FIG. 4 shows a schematic diagram of an experimental apparatus for detecting wellbore deposition according to another embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 to 3, an experimental apparatus 100 for detecting wellbore deposition according to the present invention includes a wellbore assembly including a wide-diameter wellbore member 5 and a narrow-diameter wellbore member 3, the narrow-diameter wellbore member 3 having an inner diameter smaller than that of the wide-diameter wellbore member.
In one embodiment, the wide bore tubular member 5 and the narrow bore tubular member 3 may be integrally formed such that the first end of the wide bore tubular member 5 and the first end of the narrow bore tubular member 3 are in facing communication, forming a tapered portion within the junction therebetween.
In a preferred embodiment, the wide diameter wellbore member 5 and the narrow diameter wellbore member 3 are independent of each other, and they are removable and installable relative to each other. When the first end of the wide-diameter wellbore member 5 and the first end of the narrow-diameter wellbore member 3 are joined to face each other, a variable diameter portion is formed inside the joint between the wide-diameter wellbore member 5 and the narrow-diameter wellbore member 3.
The experimental device 100 may further include a first fluid passage 10 in communication with the second end of the wide diameter wellbore member 5, and a second fluid passage 2 in communication with the second end of the narrow diameter wellbore member 3.
The first fluid passage 10 communicates with, for example, a pumping mechanism 16. The second fluid passage 2 communicates with, for example, the test fluid recovery vessel 15. Thus, the pumping mechanism 16 may pump the test fluid (e.g., mud) through the first fluid passage 10, the wide-diameter wellbore section 5, the narrow-diameter wellbore section 3, the second fluid passage 2, and ultimately into the test fluid recovery vessel 15. Thus, a situation in which fluid flows from a wide diameter wellbore to a narrow diameter wellbore (e.g., in direction 501 in fig. 3) may be simulated.
Alternatively or additionally, the test fluid may be caused to flow from the second fluid passage 2 through the narrow-diameter wellbore member 3, the wide-diameter wellbore member 5, and the first fluid passage 10. Therefore, the condition that the fluid flows from the narrow diameter well bore to the wide diameter well bore can be simulated.
The user may observe or inspect the wellbore assembly during or after the flow of the test fluid to determine the deposition and plugging of the wellbore assembly, particularly the variable diameter portion.
In the embodiment shown in fig. 1, a plurality of wide diameter wellbore elements 5 and a corresponding number of narrow diameter wellbore elements 3 are provided. The plurality of wide diameter wellbore elements 5 are arranged in a ring radiating manner in a first longitudinal plane, with their first ends all disposed towards the centre of the ring. Similarly, the plurality of narrow bore wellbore elements 3 are arranged in an annular radial pattern in the first longitudinal plane with their second ends all disposed towards the center of the annulus. That is, the first ends of the plurality of narrow diameter wellbore members 3 are all disposed facing away from the center of the annulus. The plurality of narrow bore wellbore pieces 3 are surrounded by the plurality of wide bore wellbore pieces 5 such that a first end of each narrow bore wellbore piece 3 can be opposite a first end of a corresponding wide bore wellbore piece 5.
In this case, the wellbore assembly comprising one pair of the wide-diameter wellbore member 5 and the narrow-diameter wellbore member 3 may be tested, or a plurality of wellbore assemblies may be tested simultaneously. The orientation of each wellbore component in the first longitudinal plane is different, thereby simulating and detecting wellbore components at different angles of inclination.
In addition, in this case, the space required for the experimental apparatus 100 can be effectively saved, and particularly, the area required for the experimental apparatus can be effectively saved. This can reduce the requirement and the restriction of experimental apparatus 100 to the experiment place by a wide margin, effectively improves experimental apparatus 100's adaptability.
In the case of the above-described arrangement shown in fig. 1, if the flow of the test fluid from the wide-diameter cylindrical member 5 to the narrow-diameter cylindrical member 3 is to be achieved, the following arrangement is made.
The first fluid passage 10 may comprise an annular, first primary passage surrounding the plurality of wide diameter wellbore members 5, which first primary passage is in communication with the pumping mechanism 16. The first fluid passage 10 further includes a plurality of first branch passages, and one end of each first branch passage is communicated with the first main passage, and the other end is communicated with the second end of the wide-diameter wellbore member 5. A respective pressure control diverter 11 is provided for the respective wide diameter wellbore member 5 in each first branch passage, and a valve 9 is provided downstream of the pressure control diverter 11. The pressure-controlled splitter 11 here can be, for example, a constant-pressure constant-speed pump.
It will be appreciated that if it is desired to pass test fluid from the narrow bore tubular member 3 to the wide bore tubular member 5, a corresponding pressure control diverter and valve may be provided in the second fluid passage 2 communicating to the second end of the narrow bore tubular member 3.
In addition, with the above-described arrangement shown in FIG. 1, the experimental device 100 may further include a rack assembly 13, the rack assembly 13 including a hollow first leg 132 (FIG. 2). The first leg 132 serves as a support structure, one end of which may be supported on the ground or any base for mounting the experimental device 100, for example, and the other end of which extends to the center of the annular shape in which the narrow-diameter wellbore member 3 is disposed. Additional support structure may be provided between the other end of the first leg 132 and the narrow diameter wellbore member 3. The first leg 132 may be part of the second fluid passage 2. Other parts of the second fluid channel 2 may for example comprise hoses or other piping structures. Thus, test fluid may flow from the narrow bore wellbore component 3 through the passage in the first leg 132 to the test fluid recovery reservoir 15, or from another pumping mechanism through the passage in the first leg 132 to the narrow bore wellbore 3. This arrangement of the first leg 132 as both a support and a portion of the channel facilitates saving space occupied by the entire experimental device 100 and ensures a reasonable and unobstructed fluid flow path.
In addition, the wide diameter wellbore element 5 and the narrow diameter wellbore element 3 can be moved relative to each other to achieve an interface therebetween. In the embodiment shown in fig. 1 and 3, the narrow diameter wellbore section 3 may be moved by the hydraulic mechanism 1 in the insertion direction 101 towards the wide diameter wellbore section 5 such that the narrow diameter wellbore section 3 interfaces with the wide diameter wellbore section 5. The experimental apparatus 100 may further include a drive oil pump 14, and the drive oil pump 14 is in communication with the above-described hydraulic mechanism 1 through a first hydraulic oil passage. The drive oil pump 14 may pump hydraulic oil into the hydraulic mechanism 1 to push the narrow-diameter wellbore member 3 toward the wide-diameter wellbore member 5, or may suck hydraulic oil from the hydraulic mechanism 1 to enable the narrow-diameter wellbore member 3 to move away from the wide-diameter wellbore member 5. The hydraulic mechanism 1 may be configured by, for example, a hydraulic cylinder, a hydraulic telescopic column, or the like. Alternatively or additionally, the wide-diameter wellbore member 5 may be movable toward the narrow-diameter wellbore member 3.
As shown in fig. 2, the rack assembly 13 of the experimental device 100 further comprises a hollow second leg 131. The second leg 131 serves as a support structure, one end of which may be supported on the ground or any base for mounting the experimental device 100, for example, and the other end of which extends to the center of the annular shape in which the narrow-diameter wellbore member 3 is disposed. Additional support structure may be provided between the other end of the second leg 131 and the narrow diameter wellbore member 3. The second leg 131 may serve as a part of the first hydraulic oil passage. The other part of the first hydraulic oil passage may comprise, for example, a hose or other piping structure. Thereby, hydraulic oil can flow between the hydraulic machine 1 and the drive oil pump 14 through the second leg 131. This arrangement of the second leg 131 serving both as a support and as a part of the passage is advantageous for saving the space occupied by the entire experimental device 100 and for ensuring a reasonable and unobstructed flow path for the hydraulic oil.
In the embodiment shown in fig. 2, the bracket assembly includes the first leg 132 and the second leg 131 described above. They both extend obliquely relative to the wide-diameter wellbore member 5 and the narrow-diameter wellbore member 3 in a second longitudinal plane perpendicular to the first longitudinal plane. The upper end (i.e., the other end) of the first leg 132 and the upper end (i.e., the other end) of the second leg 131 can intersect and connect at the center of the circular arrangement to ensure the structural stability of the experimental device 100. Other support structures may be provided for the experimental device 100 as desired.
In addition, the experimental device 100 of the present invention is preferably provided with a rotational bearing 12 at the center of the annular arrangement (i.e. at the intersection of the upper ends of the first leg 132 and the second leg 131 of the support assembly 13). The rotor of the swivel bearing 12 is connected to the narrow bore wellbore member 3 and the stator of the swivel bearing 12 is connected to the support assembly 13, thereby allowing the narrow bore wellbore member 3 to rotate in a first longitudinal plane relative to the support assembly 13 about the centre of the annular arrangement. With this arrangement, the swivel bearings allow the narrow diameter wellbore member 3 to rotate relative to the support assembly 13.
In one instance, the narrow diameter wellbore member 3 may rotate while the wide diameter wellbore member 5 does not. At this time, the narrow diameter wellbore sections 3 may be rotated relative to the wide diameter wellbore sections 5, thereby allowing each narrow diameter wellbore section 3 to oppose and engage a different wide diameter wellbore section 5 to form a wellbore assembly. Here, the inner diameters of the respective narrow bore hole assemblies 3 may be made different, or at least the inner diameters of two of the narrow bore hole assemblies 3 may be made different. Alternatively or additionally, the inner diameter of each wide diameter wellbore member 5 may be made different, or at least the inner diameters of two of the wide diameter wellbore members 5 may be made different. Thus, it is possible to measure the detection of wellbore components of different sizes at certain determined borehole angles. For example, 8 wide- diameter wellbore members 5 and 8 narrow-diameter wellbore members 3 are provided as shown in fig. 1. The 8 wide bore wellbore members 5 are arranged uniformly in a circle, whereby 8 determined skew angles can be obtained. These 8 inclination angles cover substantially most of the cases in a practical wellbore arrangement. Therefore, the experimental device 100 can substantially meet the requirements of general detection experiments, and has low cost and good economic benefit.
In another case, while the narrow bore tubular members 3 are rotatable, the wide bore tubular members 5 may also be rotatable independently of the narrow bore tubular members 3 so that each wide bore tubular member 5 may be engaged with a corresponding narrow bore tubular member 3 at a more freely selected angle. Here, each wide-diameter wellbore member 5 and each narrow-diameter wellbore member 3 may also have different sizes. Therefore, the detection of the shaft components with different sizes can be carried out under a plurality of angles, and specific angles can be simulated according to special requirements so as to obtain the detection result of the shaft components under a specific oblique angle. The cost of such an experimental set-up 100 would be relatively high compared to the previous case, but would satisfy more specific testing requirements. Here, the wide bore wellbore element 5 may be supported by an additional support structure to the centre of the annular arrangement and in rotational engagement with the support assembly 13 at the centre by means of a rotational bearing. Alternatively, the wide diameter wellbore member 5 may be suspended from the ceiling by an additional support structure and rotation of the wide diameter wellbore member 5 relative to the center of the annular arrangement is achieved by a rotational bearing.
It should be understood that the testing apparatus 100 may also be provided with only one wellbore assembly and the above-described rotation and support structure provided for the wellbore assembly, thereby allowing testing of the wellbore assembly at different angles.
It should also be understood that the wide diameter wellbore member 5 and the narrow diameter wellbore member 3 are removable and replaceable. Therefore, different sizes and types of wide-diameter well cylinder parts 5 and narrow-diameter well cylinder parts 3 can be replaced according to the needs to meet the experimental needs.
Additionally, in the embodiment shown in FIG. 3, the narrow diameter wellbore member 3 has a smaller outer diameter than the wide diameter wellbore member 5, such that the first end of the narrow diameter wellbore member 3 may be inserted into the first end of the wide diameter wellbore member 5 to effect an interface therebetween.
In the embodiment shown in fig. 3, a sealing cover plate 601 extending perpendicularly with respect to the axial direction of the wide-diameter and narrow- diameter wellbore members 5, 3 is provided between the first end of the narrow-diameter wellbore member 3 and the first end of the wide-diameter wellbore member 5. The first end of the sealing cover plate 601 is opposite the side wall of the first end of the narrow diameter wellbore element 3, on which side wall a sealing groove 302 is provided for sealing engagement (e.g. by a sealing ring or the like) with the first end of the sealing cover plate 601. The second end of the seal cover plate 601 extends into the cover plate guide groove 6 and enables the seal cover plate 601 to extend and retract relative to the cover plate guide groove 6, thereby achieving that the first end of the seal cover plate 601 is close to and sealingly engaged with the seal groove 302 of the narrow-diameter wellbore member 3 and the second end of the seal cover plate 601 is remote from and separated from the seal groove 302 of the narrow-diameter wellbore member 3. The cover plate guide groove 6 is located outside the wide diameter well bore member 5. After the sealing cap plate 601 is sealingly engaged with the narrow-diameter wellbore member 3, the first end of the wide-diameter wellbore member 5 abuts against the surface of the sealing cap plate 601 in the axial direction and sealingly engages the surface of the sealing cap plate 601 (e.g., via a sealing ring). Thereby, the fitting and sealing between the narrow diameter wellbore member 3 and the wide diameter wellbore member 5 can be achieved.
The above-described extension and retraction of the seal cover 601 with respect to the cover guide groove 6 can be achieved by communicating an oil passage between the cover guide groove 6 and the drive oil pump 14. Thus, the drive oil pump 14 pumps hydraulic oil into the cover guide groove 6 to extend the seal cover 601, or pumps hydraulic oil from the cover guide groove 6 to retract the seal cover 601.
In another embodiment, as shown in fig. 4, the cover plate guide groove 6 is installed in the first end of the wide diameter wellbore member 5 and extends perpendicular to the axial direction of the wide diameter wellbore member 5. The seal cover 6 is retractable under the guidance of the cover guide groove 6. In this case, the cover plate guide groove 6 is sealingly fixedly connected to the wide-diameter wellbore member 5, for example, by being integrally formed, welded or connected by any other suitable means.
In another embodiment, the sealing cover plate is fixed directly to the side wall of the first end of the narrow diameter wellbore member 3. As the first end of the narrow diameter wellbore element 3 moves towards the first end of the wide diameter wellbore element 5, the wide diameter wellbore element 5 may bear in an axial direction against the surface of the sealing cap to effect a seal.
Furthermore, as shown in fig. 3, the experimental apparatus 100 may further include a first measuring mechanism 4 provided on a side wall of the first end of the narrow-diameter wellbore member 3 and/or a first measuring mechanism 7 provided on a side wall of the first end of the wide-diameter wellbore member 5. The above-mentioned first measuring means 4 and 7 are configured to measure at least one of temperature, pressure, acoustic impedance and electrical impedance of the diameter-reducing portion. The acoustic and/or electrical impedance measured by the first measuring means 4 and 7 is the acoustic and/or electrical impedance perpendicular to the axial direction.
In addition, as shown in fig. 3, the experimental apparatus 100 may further include a second measuring mechanism 8 provided on a bottom wall of the second end of the narrow-diameter wellbore member 3 and/or the wide-diameter wellbore member 5. The second measuring means 8 is configured to measure at least one of temperature and pressure near the bottom wall and acoustic impedance and electrical impedance in the axial direction. The temperature and pressure measured by the second measuring means 8 is the temperature and pressure of the test fluid just entering the wellbore assembly or the temperature and pressure of the test fluid about to leave the wellbore assembly.
Through the data obtained by the measurement, the corresponding deposition rate, deposition amount and the like can be calculated. This is useful for predicting and generalizing the laws of deposition and clogging.
Additionally, the wide diameter wellbore component 5 and the narrow diameter wellbore component 3 may be configured to be transparent throughout (or at least at their first ends) to facilitate a user's observation of settling and plugging conditions within the wellbore component, particularly at the variable diameter portion. The deposition rate and the deposition amount obtained by the calculation are combined, so that the further prediction and induction of the deposition and blockage rules are facilitated. The wide-diameter wellbore member 5 and the narrow-diameter wellbore member 3 herein may be made of, for example, plexiglas so that they can withstand a pressure of 10MPa or more.
The pressure control diverter 11 above may be used to regulate the flow of test fluid into the wellbore assembly. Additionally, the temperature and/or composition of the test fluid entering the test device 100 may also be adjusted accordingly. Thereby, the condition of test fluids of different flow rates, pressures, temperatures and/or compositions can be detected. This can be used to simulate different well depths, different downhole conditions.
After the experiment, the pumping mechanism 16 may be replaced with an air compressor to deliver air into the wellbore assembly for the sweeping operation. After separating the wide-diameter wellbore member 5 and the narrow-diameter wellbore member 3 from the column, the deposition clogging at a complicated portion (e.g., a diameter-variable portion) can be easily removed.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An experimental device for detecting shaft sedimentation comprises a shaft assembly, wherein the shaft assembly comprises a wide-diameter shaft part and a narrow-diameter shaft part, the inner diameter of the narrow-diameter shaft part is smaller than that of the wide-diameter shaft part, a first end of the wide-diameter shaft part and a first end of the narrow-diameter shaft part are butted together along the axial direction, a reducing part is formed inside the joint between the wide-diameter shaft part and the narrow-diameter shaft part,
wherein the test fluid is capable of flowing in an axial direction into the wellbore assembly and through the variable diameter portion.
2. The experimental device of claim 1 wherein the wide diameter wellbore member and the narrow diameter wellbore member are configured to be removable and installable relative to one another.
3. The experimental apparatus of claim 2 wherein the wide diameter wellbore member is movable in an axial direction to be proximate to the narrow diameter wellbore member and/or the narrow diameter wellbore member is movable in an axial direction to be proximate to the wide diameter wellbore member,
such that the first end of the narrow diameter wellbore element is insertable into the first end of the wide diameter wellbore element.
4. The experimental apparatus of claim 2 or 3, wherein a sealing cover plate extending perpendicular to an axial direction of the wide-diameter wellbore member and the narrow-diameter wellbore member is disposed between the wide-diameter wellbore member and the narrow-diameter wellbore member, the sealing cover plate being configured to sealingly engage with the first end of the wide-diameter wellbore member and the first end of the narrow-diameter wellbore member to effect a seal between the wide-diameter wellbore member and the narrow-diameter wellbore member.
5. The experimental device as claimed in claim 4, wherein a sealing groove is formed on an outer side wall of the first end of the narrow-diameter shaft, and the sealing cover plate is configured to be inserted into the sealing groove to seal with the narrow-diameter shaft.
6. The experimental apparatus as claimed in claim 4 or 5, wherein the first end of the sealing cover plate is configured to be capable of sealing with the narrow-diameter shaft member, the second end of the sealing cover plate is telescopically inserted into a cover plate guide groove, the cover plate guide groove is communicated with the sealing hydraulic passage,
when fluid is introduced into the cover plate guide groove through the sealing hydraulic passage, the sealing cover plate moves towards the narrow-diameter well barrel part until the first end of the sealing cover plate is sealed with the narrow-diameter well barrel part,
upon drawing fluid from within the cover plate guide slot through the sealing hydraulic conduit, the sealing cover plate moves away from the narrow bore tubular member such that the first end of the sealing cover plate is separated from the narrow bore tubular member.
7. The testing device of any one of claims 1 to 6, wherein the testing device comprises a plurality of the narrow-diameter wellbore elements and a plurality of the wide-diameter wellbore elements, the plurality of narrow-diameter wellbore elements being annularly radially arranged in a first longitudinal plane, the plurality of wide-diameter wellbore elements being annularly radially arranged around the plurality of narrow-diameter wellbore elements in the first longitudinal plane such that the orientation of each wide-diameter wellbore element differs from each other and the orientation of each narrow-diameter wellbore element differs from each other, the first end of each narrow-diameter wellbore element being insertable into the first end of the wide-diameter wellbore element opposite thereto to form the variable diameter portion.
8. The experimental device of claim 7 wherein at least two of the plurality of wide diameter wellbore pieces have different inner diameters relative to one another and/or at least two of the plurality of narrow diameter wellbore pieces have different inner diameters relative to one another.
9. Experimental apparatus according to claim 7 or 8, characterised in that the plurality of narrow bore wellbore elements and/or the plurality of wide bore wellbore elements are configured to be rotatable about the centre of the arranged annulus.
10. The assay device according to any one of claims 1 to 9, further comprising:
a first measurement mechanism mounted on a sidewall of the first end of the wide diameter wellbore element and/or the narrow diameter wellbore element, the first measurement mechanism configured to measure at least one of temperature, pressure, acoustic impedance, and electrical impedance at the first end of the wide diameter wellbore element and/or the narrow diameter wellbore element; and
a second measurement mechanism mounted on a bottom wall of the second end of the wide diameter wellbore element and/or the narrow diameter wellbore element, the second measurement mechanism configured to measure at least one of temperature, pressure, acoustic impedance, and electrical impedance at the second end of the wide diameter wellbore element and/or the narrow diameter wellbore element.
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| CN112647929B (en) | 2024-05-14 |
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