CN110320131A - PH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device and evaluation method - Google Patents
PH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device and evaluation method Download PDFInfo
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- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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Abstract
The invention belongs to Oil-Gas Well Engineering cementing technology fields, and in particular to pH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device and evaluation method.PH sensitivity annular space sealing agent of the present invention underground viscosity characteristics Assessment of Changes device, comprising: viscosity apparatus control device, cementitious core holding frame, viscosity measurement cup.Viscosity apparatus control device of the present invention is modified other positions on the basis of using existing conventional digital display viscosity apparatus control device using existing conventional digital display viscosity apparatus control device.The device can simulate underground hot environment, sealing agent encounters alkaline matter and starts to thicken in microcrack, the changing rule of fluid viscosity in contact process, viscosity value in viscosity apparatus control device can detecte thickening process, and then tackifying ability of the sealing agent in seam is evaluated, the deficiency evaluated very well can not be made to sealing agent tackifying ability by compensating for the prior art.
Description
Technical field
The invention belongs to Oil-Gas Well Engineering cementing technology fields, and in particular to pH sensitivity annular space sealing agent underground viscosity characteristics
Assessment of Changes device and evaluation method.
Background technique
Oil gas well cementing operation cement sheath refers to the Behavior of Hardened Cement Paste that cement slurry is formed in annular space, well cementing operation rear sleeve and ground
Layer is cemented together by cement sheath.The main function of cement sheath is to realize oil, water Inter-zonal packing, prevents crossflow, is guaranteed
Oil gas safety in production.In order to realize this function, cement sheath must be continuous and impermeable.Due to the self-defect-of cement material
Volume contraction and brittleness, at present all there is cement sheath packing failure in many oil/gas wells.Cement sheath microcrack is to lead to layer
Between insulate failure the main reason for one of.It is a kind of solution cementing concrete ring appearance that pH sensitivity annular space sealing agent is infused into microcrack
The effective measures of microcrack.
PH sensitivity annular space sealing agent is water phase sealing agent, behind injection crack and in the alkaline matter generation in cement sheath crack
It is reacted with thickening, while by the effect for stitching interior heat initiation, polymerization reaction occurs for the sealing agent after thickening, and plastic blocks in stitching
Crack.
Fluid big for oil gas well cementing operation field viscosity at present, test method is surveyed using digital display viscosimeter
Examination, the result that this kind of test method obtains are only the viscosity characteristics that no external condition interferes lower fluid itself.For pH sensing ring
Encountering alkaline matter in cement sheath crack the feelings of viscosity increase can occur for empty fluid of the sealing agent this kind based on pH sensitive
Condition, conventional viscosimeter, which can not change its viscosity characteristics in cement sheath crack, makes good evaluation.
Summary of the invention
The purpose of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of simulation test pH sensitivity annular space is provided
Alkaline matter generation neutralization thickening reaction process medium viscosity characteristic in seam is encountered after sealing agent injection cementing concrete ring microcrack to become
The evaluating apparatus and method of change.Cementitious core (the table in different sealing agents and core holding frame can be simulated by this evaluating apparatus
Alkaline matter is adhered in face) rotating contact well, variation occurs for fluid viscosity in contact process, and then evaluates the change of viscosity
Law.
PH sensitivity annular space sealing agent of the present invention underground viscosity characteristics Assessment of Changes device, comprising:
Viscosity apparatus control device, viscosity apparatus control device front end are equipped with display screen and operation button, viscosity apparatus control device
Lower end is equipped with threaded sleeve rod；
Cementitious core holding frame, the cementitious core holding frame include two isometric supporting rods, and two supporting rod upper ends pass through upper
Panel connection, two supporting rod lower ends are connected by lower panel；The liter gone up and down along supporting rod is equipped between top panel and lower panel
Fixed device drops；Top panel is equipped with connecting rod, and top panel is connect by connecting rod with threaded sleeve rod；Lower panel bottom is equipped with convex
Play I；
Viscosity measurement cup, the viscosity measurement cup inner wall bottom end are equipped with groove I, and groove I matches with protrusion I.
The viscosity measurement cup is equipped with heating control apparatus.
The top panel and lower panel are round panel.
The protrusion I is located below plate bottom center, and the protrusion I is cone protrusion.
The viscosity measurement cup inner wall side is equipped with graduation mark.
The device further includes the pedestal set on viscosity measurement cup lower part；Lower end is equipped with cylindrical body outside the viscosity measurement cup
Raised II, the pedestal are equipped with the groove II to match with cylindrical body protrusion II.
The lifting and fixing device includes cavity, and cavity is equipped with through-hole, and screw rod is equipped in through-hole, is equipped with spiral shell in cavity
Female and rotary table, nut are fixed on inside cavity upper end and are connected through a screw thread with screw rod, and rotary table is connect with screw rod lower end, on screw rod
End is equipped with handle；Cavity two sides are symmetrically arranged with support arm, and the support arm other end is equipped with rod set, the cavity at perforation both ends is equipped in support arm,
Motion bar is equipped in cavity；Motion bar one end and frustum cone side movable contact, the other end protrude into rod set.
What viscosity apparatus control device of the present invention was all made of is existing conventional digital display viscosity apparatus control device,
Range ability selects 0-100000mPas, for example, by using the viscosity apparatus of model NDJ-9S.The present invention is using existing normal
On the basis of the digital display viscosity apparatus control device of rule, other positions are modified, keep it sensitive more suitable for Simulation evaluation pH
Alkaline matter in seam is encountered after annular space sealing agent injection cementing concrete ring microcrack, the variation rule of fluid viscosity in contact process
Rule.
Using pH sensitivity annular space sealing agent of the present invention underground viscosity characteristics Assessment of Changes device to the sensitive annular space of pH
Sealing agent is evaluated, the specific steps are that:
(0) the initial-viscosity number μ using conventional viscosity instrument measurement sealing agent at test temperature0；
(1) cementitious core is fixed on cementitious core holding frame, using threaded sleeve rod by cementitious core holding frame and viscosity instrument control
Device processed is connected, and viscosity apparatus control device drive cementitious core holding frame is adjusted up certain altitude using lifting support, is guaranteed
The subsequent sealing agent poured into will not shift to an earlier date to be contacted with cementitious core；PH sensitivity annular space sealing agent is poured into viscosity measurement cup to graduation mark
The groove II of viscosity measurement cup bottom protrusion II alignment pedestal has been stablized viscosity measurement cup by place, is opened on viscosity measurement cup
Heating device sets test temperature, after temperature reaches, reuses lifting support for viscosity apparatus control device and drives cementitious core folder
It holds frame to move down, until cementitious core holding frame lower lobes I has stablized cementitious core folder in alignment with viscosity measurement cup interior grooves I
Frame is held, the sealing agent in cup did not had cementitious core just at this time；
(2) start viscosity apparatus control device, revolving speed is set, keep revolving speed constant, every operation a period of time t is recorded viscous
μ is spent, is no longer changed to viscosity, mu, test terminates；
(3) using time t as abscissa, viscosity, mu is ordinate, obtains the change of viscosity, mu t at any time during sealing agent thickening
Change curve, the tackifying ability quality of pH sensitivity annular space sealing agent is evaluated by slope of curve size or growth trend speed.
More specifically, cement core model is placed in below cementitious core holding frame on plate, by lifting and fixing device along
Supporting rod is adjusted to proper height, and the handle of the fixed device of upward rotation and lifting drives rotary table to move upwards, so that movable
Bar is moved to two sides, protrudes into rod set the clamping realized to supporting rod.By the measurement of cementitious core holding frame alignment viscosity measurement cup
Cup groove, has stablized cementitious core holding frame, by the cylindrical body protrusion of viscosity measurement cup in alignment with the base groove of instrument base, surely
Viscosity measurement cup is set, the heating control apparatus of viscosity measurement cup is opened, is heated to set temperature, temperature is sensitive by pH after reaching
Annular space sealing agent pours into viscosity measurement cup at regulation graduation mark.Start viscosity apparatus control device, be arranged revolving speed, cementitious core according to
It by the rotation of core holding frame, is rotated in viscosity measurement cup, pH sensitivity annular space sealing agent and cement wicking surface in rotary course
Alkaline matter contact very well occurs, sealing agent occurs to neutralize thickening reaction while contact, and fluid viscosity is gradually in measuring cup
Increase, correspond on viscosity operating display be shown viscosity value be gradually increased, no longer change to viscosity, mu, test terminates；
The viscosity measurement cup inner wall bottom end is equipped with groove, and the cone that groove can be put into cementitious core holding frame lower end is convex
It rises, lower end is equipped with cylindrical body protrusion outside the viscosity measurement cup, consolidates viscosity measurement cup with this；
The lifting and fixing device holds two cylindrical supporting rods tightly respectively or slide up and down in cylindrical supporting rod can be with
Clamp the core of different length.Lifting and fixing device of the present invention can also use its with said function of this field
The fixed device of his normal elevator.
Beneficial effects of the present invention:
(1) different temperatures, different size cementitious core, variety classes sealing agent can be carried out using evaluating apparatus of the invention
Thickening experiment；
(2) it is fitted using the thickening process that evaluating apparatus of the invention can enter sealing agent after microcrack in seam
Work as simulation, entered in seam using contact of the cementitious core surface alkalinty substance in rotary course with sealing agent to simulate sealing agent,
With the contact of seam inner surface alkaline matter, during sealing agent occurs after contacting with alkaline matter and thickens and react sealing agent and start to become
Thick, the viscosity value in viscosity apparatus control device can detecte thickening process, and then evaluate thickening energy of the sealing agent in seam
Power.Compensate for the prior art cannot be simulated in viscosity test device sealing agent encounter cementitious core surface alkalinty substance thickening not
Foot.
Detailed description of the invention
Fig. 1 is pH sensitivity annular space sealing agent of the present invention underground viscosity characteristics Assessment of Changes apparatus structure schematic diagram；
Fig. 2 is pedestal overlooking structure diagram of the present invention；
Fig. 3 is the A-A of Fig. 1 to overlooking structure diagram；
Fig. 4 is lifting and fixing device structural schematic diagram of the present invention；
Fig. 5 is the change curve of difference pH sensitivity annular space sealing agent viscosity, mu t at any time in embodiment 3；
In figure: 1, viscosity measurement cup；2, lifting and fixing device, 2-1, cavity, 2-2, through-hole, 2-3, screw rod, 2-4, nut,
2-5, motion bar, 2-6, handle, 2-7, support arm, 2-8, rod set, 2-9, cavity；3, supporting rod；4, cementitious core；5, protrusion I；6, convex
Play II；7, pedestal；8, groove II；9, groove I；10, lower panel；11, heating control apparatus；12, cementitious core holding frame；13, on
Panel；14, connecting rod；15, threaded sleeve rod；16, viscosity apparatus control device；17, display screen；18, operation button；19, lifting branch
Frame.
Specific embodiment
Embodiment 1
PH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device, the device include:
Viscosity apparatus control device 16,16 front end of viscosity apparatus control device are equipped with display screen 17 and operation button 18, viscosity apparatus
16 lower end of control device is equipped with threaded sleeve rod 15, and viscosity apparatus control device 16 is connected with lifting support 19；
Cementitious core holding frame 12, the cementitious core holding frame 12 include two isometric supporting rods 3, two 3 upper ends of supporting rod
It is connected by top panel 13, two 3 lower ends of supporting rod are connected by lower panel 10；Edge is equipped between top panel 13 and lower panel 10
The lifting and fixing device 2 that supporting rod 3 is gone up and down；Top panel 13 is equipped with connecting rod 14, and top panel 13 passes through connecting rod 14 and screw thread
Loop bar 15 connects；10 bottom of lower panel is equipped with protrusion I5；
Viscosity measurement cup 1, the 1 inner wall bottom end of viscosity measurement cup are equipped with groove I9, and groove I9 matches with protrusion I5.
1 is equipped with heating control apparatus 11 on the viscosity measurement cup.
The top panel 13 and lower panel 10 are round panel.
The protrusion I5 is located below plate bottom center, and the protrusion I5 is cone protrusion.
The 1 inner wall side of viscosity measurement cup is equipped with graduation mark.
The device further includes the pedestal 7 set on 1 lower part of viscosity measurement cup；The 1 outside lower end of viscosity measurement cup is equipped with circle
Cylinder protrusion II6, the pedestal 7 are equipped with the groove II8 to match with cylindrical body protrusion II6；The pedestal 7 and lifting support
19 are connected.
The lifting and fixing device 2 includes cavity 2-1, and cavity 2-1 is equipped with through-hole 2-2, is equipped with screw rod in through-hole 2-2
Nut 2-4 and rotary table 2-4 is equipped in 2-3, cavity 2-1, nut 2-4 is fixed on cavity 2-1 inner upper end and passes through with screw rod 2-3
It is threadedly coupled, rotary table 2-4 is connect with the lower end screw rod 2-3, and the upper end screw rod 2-3 is equipped with handle 2-6；The two sides cavity 2-1 are symmetrically arranged with
Support arm 2-7, the support arm 2-7 other end are equipped with rod set 2-8, and the cavity 2-9 at perforation both ends is equipped in support arm 2-7, is equipped in cavity 2-9
Motion bar 2-5；The one end motion bar 2-5 and the side rotary table 2-4 movable contact, the other end protrude into rod set.
Embodiment 2
Using pH sensitivity annular space sealing agent described in embodiment 1 underground viscosity characteristics Assessment of Changes device to the sensitive annular space of pH
Sealing agent tackifying ability is evaluated, the specific steps are that:
(0) the initial-viscosity number μ using conventional viscosity instrument measurement sealing agent at test temperature0；
(1) cementitious core is fixed on cementitious core holding frame, using threaded sleeve rod by cementitious core holding frame and viscosity instrument control
Device processed is connected, and viscosity apparatus control device drive cementitious core holding frame is adjusted up certain altitude using lifting support, is guaranteed
The subsequent sealing agent poured into will not shift to an earlier date to be contacted with cementitious core；PH sensitivity annular space sealing agent is poured into viscosity measurement cup to graduation mark
The groove II of viscosity measurement cup bottom protrusion II alignment pedestal has been stablized viscosity measurement cup by place, is opened on viscosity measurement cup
Heating device sets test temperature, after temperature reaches, reuses lifting support for viscosity apparatus control device and drives cementitious core folder
It holds frame to move down, until cementitious core holding frame lower lobes I has stablized cementitious core folder in alignment with viscosity measurement cup interior grooves I
Frame is held, the sealing agent in cup did not had cementitious core just at this time；
(2) start viscosity apparatus control device, revolving speed is set, keep revolving speed constant, every operation a period of time t is recorded viscous
μ is spent, is no longer changed to viscosity, mu, test terminates；
(3) using time t as abscissa, viscosity, mu is ordinate, obtains the change of viscosity, mu t at any time during sealing agent thickening
Change curve, the tackifying ability quality of pH sensitivity annular space sealing agent is evaluated by slope of curve size or growth trend speed.
More specifically, cement core model is placed in below cementitious core holding frame on plate, by lifting and fixing device along
Supporting rod is adjusted to proper height, and the handle of the fixed device of upward rotation and lifting drives rotary table to move upwards, so that movable
Bar is moved to two sides, protrudes into rod set the clamping realized to supporting rod, and then fix cementitious core.Using threaded sleeve rod by cement
Core holding frame is connected with viscosity apparatus control device, drives cementitious core holding frame upward viscosity apparatus control device using lifting support
Certain altitude is adjusted, guarantees that the subsequent sealing agent poured into will not shift to an earlier date and is contacted with cementitious core.PH sensitivity annular space sealing agent is poured into
At viscosity measurement cup to graduation mark, by the groove II of viscosity measurement cup bottom protrusion II alignment pedestal, stablize viscosity measurement cup,
The heating device on viscosity measurement cup is opened, test temperature is set and reuses lifting support for viscosity instrument control after temperature reaches
Device processed drives cementitious core holding frame to move down, until cementitious core holding frame lower lobes I is in alignment with viscosity measurement cup inner-concave
Slot I has stablized cementitious core holding frame, and the sealing agent in cup did not had cementitious core just at this time.Start viscosity apparatus control device, setting
Revolving speed, cementitious core rely on the rotation of core holding frame, rotate in viscosity measurement cup, pH sensitivity annular space sealing agent in rotary course
It is contacted very well with the generation of the alkaline matter of cement wicking surface, sealing agent, which occurs to neutralize thickening, while contact reacts, in measuring cup
Fluid viscosity is gradually increased, correspond on viscosity operating display be shown viscosity value be gradually increased, it is every operation one section when
Between t, record viscosity, mu, no longer change to viscosity, mu, test terminates；Using time t as abscissa, viscosity, mu is ordinate, is sealed
The change curve of viscosity, mu t at any time during blocking agent thickening, pass through slope of curve size or growth trend speed to evaluate pH sensitive
The tackifying ability quality of annular space sealing agent.
Embodiment 3
It is viscosified using apparatus of the present invention to according to the sensitive annular space sealing agent of pH of following three formula preparations to be detected
Aptitude tests and the feasibility for verifying the present apparatus: 1.+0.67 ‰ initiator+1.00% of+1.00 ‰ crosslinking agent of 27.50% monomer
PAA；2.+0.67 ‰ initiator+1.50%PAA of+1.00 ‰ crosslinking agent of 27.50% monomer；3. 27.50% monomer+1.00 ‰ is handed over
Join the ‰ initiator+2.00%PAA of agent+0.67.
It is tested according to the application method of invention device, experiment test temperature is 50 DEG C, and experimental result is as shown in Figure 5.
From figure 5 it can be seen that the increase of monomer ratio is accounted for PAA (polyacrylic acid), sealing agent in the same period
Viscosity is bigger, and after this point especially can be seen that 2 minutes from preceding 2 minutes test results, sealing agent viscosity slightly declines.
Polyacrylic acid in the mainly sealing agent that the increase of pH sensitivity annular space sealing agent viscosity relies on, the thickening of polyacrylic acid
Mechanism is: the alkaline condition (alkaline matter of cement wicking surface) of creation increases the carboxyl dissociation amount of polyacrylic acid, causes to gather
The electrostatic repulsion between object chain is closed, so that polymer chain is fully deployed and reaches peak viscosity, and then leads to reaction system viscosity
Increase.As can be seen that the accounting of polyacrylic acid is bigger in the annular space sealing agent, when encountering alkaline matter, the carboxyl of generation from
Solution amount can be more, and the viscosity of sealing agent can be bigger.
Binding experiment result and viscosifying mechanisms characteristic, it can be seen that test pH sensitivity annular space sealing agent using apparatus of the present invention
Tackifying ability have good feasibility.
Claims (8)
1.pH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device, which is characterized in that the device includes:
Viscosity apparatus control device (16), viscosity apparatus control device (16) front end are equipped with display screen (17) and operation button (18), glue
It spends instrument control device (16) lower end and is equipped with threaded sleeve rod (15), viscosity apparatus control device (16) is connected with lifting support (19)；
Cementitious core holding frame (12), the cementitious core holding frame (12) include two isometric supporting rods (3), two supporting rods (3)
Upper end is connected by top panel (13), and two supporting rod (3) lower ends are connected by lower panel (10)；Top panel (13) and lower panel
(10) lifting and fixing device (2) gone up and down along supporting rod (3) is equipped between；Top panel (13) is equipped with connecting rod (14), above
Plate (13) is connect by connecting rod (14) with threaded sleeve rod (15)；Lower panel (10) bottom is equipped with protrusion I (5)；
Viscosity measurement cup (1), viscosity measurement cup (1) the inner wall bottom end are equipped with groove I (9), groove I (9) and protrusion I (5) phase
Matching.
2. pH sensitivity annular space sealing agent according to claim 1 underground viscosity characteristics Assessment of Changes device, which is characterized in that
(1) is equipped with heating control apparatus (11) on the viscosity measurement cup.
3. pH sensitivity annular space sealing agent according to claim 1 underground viscosity characteristics Assessment of Changes device, which is characterized in that
The top panel (13) and lower panel (10) are round panel.
4. pH sensitivity annular space sealing agent according to claim 1 underground viscosity characteristics Assessment of Changes device, which is characterized in that
The protrusion I (5) is located below plate bottom center, and the protrusion I (5) is cone protrusion.
5. pH sensitivity annular space sealing agent according to claim 1 underground viscosity characteristics Assessment of Changes device, which is characterized in that
Viscosity measurement cup (1) the inner wall side is equipped with graduation mark.
6. pH sensitivity annular space sealing agent according to claim 1 underground viscosity characteristics Assessment of Changes device, which is characterized in that
The device further includes the pedestal (7) set on viscosity measurement cup (1) lower part；The external lower end of the viscosity measurement cup (1) is equipped with cylinder
Body protrusion II (6), the pedestal (7) are equipped with the groove II (8) to match with cylindrical body protrusion II (6)；The pedestal (7) with
Lifting support (19) is connected.
7. pH sensitivity annular space sealing agent according to claim 1 underground viscosity characteristics Assessment of Changes device, which is characterized in that
The lifting and fixing device (2) includes cavity (2-1), and cavity (2-1) is equipped with through-hole (2-2), is equipped with spiral shell in through-hole (2-2)
Bar (2-3), cavity (2-1) is interior to be equipped with nut (2-4) and rotary table (2-4), and nut (2-4) is fixed on cavity (2-1) inner upper end
And be connected through a screw thread with screw rod (2-3), rotary table (2-4) is connect with the lower end screw rod (2-3), and the screw rod upper end (2-3) is equipped with handle
(2-6)；The two sides cavity (2-1) are symmetrically arranged with support arm (2-7), and support arm (2-7) other end is equipped with rod set (2-8), in support arm (2-7)
Cavity (2-9) equipped with perforation both ends, cavity (2-9) is interior to be equipped with motion bar (2-5)；Motion bar one end (2-5) and rotary table (2-4)
Side movable contact, the other end protrude into rod set.
8.pH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes method, which is characterized in that use any of the above-described right
It is required that the pH sensitivity annular space sealing agent underground viscosity characteristics Assessment of Changes device is evaluated, the specific steps are that:
(0) the initial-viscosity number μ using conventional viscosity instrument measurement sealing agent at test temperature0；
(1) cementitious core is fixed on cementitious core holding frame, is filled cementitious core holding frame and viscosity apparatus control using threaded sleeve rod
It sets connected, viscosity apparatus control device drive cementitious core holding frame is adjusted up certain altitude using lifting support, is guaranteed subsequent
The sealing agent poured into will not shift to an earlier date to be contacted with cementitious core；PH sensitivity annular space sealing agent is poured at viscosity measurement cup to graduation mark,
By the groove II of viscosity measurement cup bottom protrusion II alignment pedestal, stablize viscosity measurement cup, opens adding on viscosity measurement cup
Thermal sets test temperature, after temperature reaches, reuses lifting support for viscosity apparatus control device and drives cementitious core clamping
Frame moves down, until cementitious core holding frame lower lobes I has stablized cementitious core clamping in alignment with viscosity measurement cup interior grooves I
Frame, the sealing agent in cup did not had cementitious core just at this time；
(2) starting viscosity apparatus control device, revolving speed is set, keep revolving speed constant, every operation a period of time t records viscosity, mu,
No longer change to viscosity, mu, test terminates；
(3) using time t as abscissa, viscosity, mu is ordinate, and the variation for obtaining the t at any time of viscosity, mu during sealing agent thickening is bent
Line evaluates the tackifying ability quality of pH sensitivity annular space sealing agent by slope of curve size or growth trend speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910619994.8A CN110320131B (en) | 2019-07-10 | 2019-07-10 | Device and method for evaluating underground viscosity characteristic change of pH sensitive annular plugging agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910619994.8A CN110320131B (en) | 2019-07-10 | 2019-07-10 | Device and method for evaluating underground viscosity characteristic change of pH sensitive annular plugging agent |
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| CN110320131B (en) | 2022-02-08 |
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