CN116818632B - Core permeability testing device - Google Patents
Core permeability testing device Download PDFInfo
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- CN116818632B CN116818632B CN202311090761.6A CN202311090761A CN116818632B CN 116818632 B CN116818632 B CN 116818632B CN 202311090761 A CN202311090761 A CN 202311090761A CN 116818632 B CN116818632 B CN 116818632B
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- 238000012360 testing method Methods 0.000 title claims abstract description 106
- 230000035699 permeability Effects 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 207
- 230000000149 penetrating effect Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 29
- 239000011435 rock Substances 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 238000005553 drilling Methods 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The application discloses a core permeability testing device which comprises a driving unit, a clamping sealing structure and a sealing driving piece, wherein the clamping sealing structure is provided with at least four groups of sealing ring pieces, each sealing ring piece comprises a sealing arc seat, a sealing bag is arranged on each sealing arc seat, the inner wall of each sealing bag is attached to the outer wall of a core, sealing combination sleeves are arranged between the sealing ring pieces at two ends, two end baffles are arranged on the side edges, close to the end parts of the core, of each sealing arc seat, and the sealing arc seats can move inwards under the driving of the sealing driving piece to drive the sealing bags to tend to be in a filling state so as to drive the inner sides of the sealing bags to be attached to the outer wall of the core. In the application, the sealing combined sleeve is sealed in a combined sealing mode of the inner sleeve and the outer sleeve, the inner sleeve is sealed in a negative pressure sealing mode, the outer sleeve is pressurized in an elastic pressurizing mode to enable the inner sleeve to be completely attached to the periphery of the core, test fluid is prevented from entering between the inner sleeve and the core, penetrating fluid is ensured to be completely discharged through the core, and test measurement accuracy is improved.
Description
Technical Field
The application relates to a core parameter testing device, in particular to a core permeability testing device.
Background
The natural gas hydrate reservoir intrinsic permeability refers to the permeability when no hydrate exists and only water phase exists in the pores, and is the basis for determining the natural gas production rate, as the saturation of the natural gas hydrate increases, the space in the pores for water phase to flow is occupied, so that a seepage channel is narrowed or even closed, and the permeability is reduced, currently, the core permeability is generally realized through corresponding core permeability testing equipment, and the basic principle of the core permeability testing equipment is that: firstly, a rock core is placed in a sealing sleeve in a rock core holder, the peripheral surface of the rock core is sealed by means of the sealing sleeve, meanwhile, the end faces of the two axial ends of the rock core are exposed, an experimental medium enters from one end of the rock core and is discharged from the other end of the rock core, pressure loss exists in the process, and physical parameters such as the permeability of the rock core can be calculated through a formula by collecting the pressure and flow data of the experimental medium at the two axial ends of the rock core.
The core holder of the existing core permeability testing equipment generally comprises a core loading barrel and a sealing sleeve, the sealing sleeve is coaxially arranged in the core loading barrel and is close to the position of the inner wall surface, a core to be tested is loaded, a confining pressure interface for injecting gas or liquid between the core loading barrel and the sealing sleeve to form confining pressure is arranged on the barrel wall of the core loading barrel, after the core is loaded, the formed confining pressure can enable the sealing sleeve to be tightly attached to and sealed with the outer peripheral surface of the core, fluid is injected into the core, the discharged test fluid is acquired at the end of the core, parameters are acquired, and the permeability is calculated.
However, the existing core is in an incompletely regular cylindrical shape, and partial irregular outer wall body is possibly incompletely attached to the inner side of the sealing sleeve in a sealing sleeve pressurizing and sealing mode, so that partial test fluid enters a gap between the outer wall body and the sealing sleeve, and the permeated liquid cannot be completely discharged, so that the accuracy of a test result is low.
Disclosure of Invention
Therefore, the core permeability testing device provided by the application effectively solves the problem that in the prior art, partial test fluid enters a gap between the outer wall body and the sealing sleeve and cannot be completely discharged due to the fact that the irregular outer wall body of the core part is possibly incompletely attached to the inner side of the sealing sleeve, so that the accuracy of a test result is low.
In order to solve the technical problems, the application specifically provides the following technical scheme: a core permeability test device is provided with:
the driving unit is arranged at the end part of the test sample tube, a test sealing cylinder is arranged at the end part of the test sample tube, which is far away from the driving unit, a clamping pushing piece is arranged in the test sample tube, and the clamping pushing piece pushes the rock core into the test sealing cylinder;
the clamping sealing structure is arranged in the test sealing cylinder and is provided with at least four groups of sealing ring pieces, the sealing ring pieces are respectively arranged at two ends of the rock core, the sealing ring pieces are arranged between the rock core and the inner wall of the test sealing cylinder, each sealing ring piece comprises a plurality of sealing arc seats arranged along the circumferential direction, sealing bags are arranged on the sealing arc seats, the inner wall of each sealing bag is attached to the outer wall of the rock core, gaps between one group of adjacent sealing bags are far away from the gaps between the other group of adjacent sealing bags, sealing combination sleeves are arranged between the sealing ring pieces at two ends, the ends of each sealing combination sleeve are connected to the side edges of the sealing arc seats, two end baffles are arranged on the side edges of the end portions of the rock core, the end baffles are movably arranged on the test sealing cylinder and are abutted to the side edges of the end portions of the rock core, and the end baffles are combined together, and water injection holes are formed in the central positions;
the sealing driving piece is arranged on the sealing arc seat and the sealing combined sleeve, and is provided with a pulling piece which is arranged on the sealing combined sleeve and can move outwards to pull the sealing combined sleeve to a position far away from the center of the testing sealing cylinder, and the sealing arc seat can move inwards under the driving of the sealing driving piece to drive the sealing bag to be in a filling state so as to drive the inner side of the sealing bag to be attached to the outer wall of the rock core;
the high-pressure ball pump is arranged on the test sample tube, the liquid injection pump and the back pressure module are connected to the test sealing cylinder, the liquid injection pump injects liquid into the test sealing cylinder to enter the core through the water injection hole, the output end of the back pressure module is connected with the liquid meter, and the back pressure module is used for pumping the liquid penetrating through the core to the liquid meter.
Further, the width of the inner side of the sealing bag is larger than the width of the sealing bag in the sealing arc seat and is equal to the width of the sealing arc seat;
and the adjacent sealing bags are mutually abutted.
Further, a connecting column is connected to the sealing arc seat, the connecting column penetrates through the testing sealing cylinder, a penetrating groove is formed in the testing sealing cylinder, the connecting column penetrates through the penetrating groove, a connecting convex strip is arranged on the outer wall of the connecting column, a groove is formed in the inner wall of the penetrating groove, and the connecting convex strip is arranged on the groove in a sliding mode;
the connecting column is arranged in the penetrating groove in a sliding mode.
Further, a mounting ring frame is arranged outside the test sealing cylinder, an internal thread is arranged in the connecting column, a connecting screw rod is arranged in the connecting column, and the connecting screw rod is matched with the internal thread;
the connecting screw rod end connection has the connecting rod, set up the fluting on the installation link frame, the connecting rod runs through the setting on the fluting just the connecting rod rotates to be installed on the fluting.
Further, a connecting ring cavity is arranged in the mounting ring frame, a rotating toothed ring is rotationally arranged in the connecting ring cavity, a connecting toothed ring is sleeved outside the connecting rod, and the rotating toothed ring is meshed with the connecting toothed ring;
the side of the rotating toothed ring is meshed with a driving gear, the driving gear is connected with a driving motor, and the driving gear is connected with the output end of the driving motor.
Further, the connecting screw rod and the connecting rod are internally provided with axial grooves, and two ends of the axial grooves are communicated;
the sealing arc seat is connected with a vent pipe, the end part of the vent pipe penetrates through the sealing arc seat and is communicated with the sealing bag, the vent pipe penetrates through the inside of the connecting column and the axial groove, and the outer end of the vent pipe is connected with a high-pressure pump.
Further, the sealing combined sleeve comprises an inner sleeve and an outer sleeve;
the outer sleeve is a rubber sleeve, the inner sleeve is of a structure capable of deforming under the action of pressure, a connecting seat is arranged on the inner sleeve, the inside of the connecting seat is communicated with a space between the inner sleeve and the core, a connecting groove for the connecting seat to pass through is formed in the outer sleeve, a rubber pad is arranged at the bottom of the connecting seat, and an opening is formed in the rubber pad.
Further, the outer end of the connecting seat is connected with a second air pump;
the pulling piece is installed and connected to the outer wall of the outer sleeve, a driving shaft is arranged on the pulling piece, a lifting seat is installed on the connecting seat, and driving cylinders are connected to the lifting seat and the driving shaft.
Further, the clamping pushing piece comprises a push rod and a gripper connected to the end part of the push rod;
the gripper clamps the rock core;
the driving unit comprises a servo motor and a driving screw rod connected to the output end of the servo motor, and the driving screw rod is matched with the push rod.
Further, when the ball port in the high-pressure ball pump is opposite to the test sealing cylinder, the push rod and the gripper push the core into the test sealing cylinder;
the inner diameter of the test sealing cylinder is larger than the inner diameter of the test sample tube.
Compared with the prior art, the application has the following beneficial effects:
according to the application, the sealing arc seat is provided with the sealing bag, the sealing bag seals the peripheral wall of the end part of the core, the sealing combination sleeve is arranged between the sealing ring pieces and seals in a combined sealing mode of the inner sleeve and the outer sleeve, wherein the inner sleeve seals in a negative pressure sealing mode, the outer sleeve pressurizes the inner sleeve in an elastic pressurizing mode to enable the inner sleeve to be completely attached to the peripheral side of the core, test fluid is prevented from entering between the inner sleeve and the core, penetrating liquid is guaranteed to be completely discharged through the core, and test measurement accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
Fig. 1 is a schematic structural diagram of a core permeability testing device according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a test seal cartridge according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a test seal cartridge in an embodiment of the application;
FIG. 4 is a schematic view of a portion of a seal driver in accordance with an embodiment of the present application;
FIG. 5 is a schematic view of the mounting structure of the seal cartridge in an embodiment of the present application;
FIG. 6 is a schematic view of a seal cartridge of one set of seal cartridges in an embodiment of the present application;
FIG. 7 is a schematic view of another set of sealing bladders in an embodiment of the application;
FIG. 8 is a schematic view of an end shield according to an embodiment of the present application;
FIG. 9 is a schematic view of a through slot according to an embodiment of the present application;
fig. 10 is a schematic structural view of a seal assembly according to an embodiment of the present application.
Reference numerals in the drawings are respectively as follows:
1-testing a sample tube; a 2-drive unit; 3-clamping the sealing structure; 4-sealing the driving member; 5-testing the sealing cylinder; 6-clamping the pushing piece; 7-a sealing ring member; 8-core; 9-sealing the combined sleeve; 10-a high-pressure ball pump; 11-a liquid injection pump; 12-a backpressure module; 13-liquid meter;
21-a servo motor; 22-driving a screw;
41-pulling piece; 42-mounting a ring frame; 43-connecting screw; 44-connecting rods; 45-slotting; 46-connecting the annular chamber; 47-rotating the toothed ring; 48-connecting a toothed ring; 49-drive gear; 410-driving a motor; 411-axial slots; 412-a vent tube; 413-high pressure pump;
61-pushing rod; 62-grippers;
71-sealing the arc seat; 72-sealing the bladder; 73-end baffles; 74-water injection holes; 75-connecting columns; 76-a through slot; 77-connecting convex strips; 78-groove;
91-inner sleeve; 92-coat; 93-connecting seats; 94-connecting grooves; 95-rubber pads; 96-a second air pump; 97-drive shaft; 98-lifting seat; 99-driving cylinder.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1, the application provides a core permeability testing device, which is provided with a driving unit 2, a clamping sealing structure 3 and a sealing driving piece 4.
The driving unit 2 is arranged at the end part of the test sample tube 1, the end part of the test sample tube 1 far away from the driving unit 2 is provided with the test sealing cylinder 5, the test sample tube 1 is internally provided with the clamping pushing piece 6, and the clamping pushing piece 6 pushes the core 8 into the test sealing cylinder 5.
The clamping sealing structure 3 is installed in the test sealing cylinder 5, the clamping sealing structure 3 is provided with at least four groups of sealing ring pieces 7, the sealing ring pieces 7 are respectively installed at two ends of the core 8, the sealing ring pieces 7 are arranged between the core 8 and the inner wall of the test sealing cylinder 5, the sealing ring pieces 7 comprise a plurality of sealing arc seats 71 which are arranged along the circumferential direction, sealing bags 72 are arranged on the sealing arc seats 71, the inner wall of each sealing bag 72 is attached to the outer wall of the core 8, gaps between adjacent sealing bags 72 of one group are far away from the gaps between adjacent sealing bags 72 of the other group, sealing combined sleeves 9 are arranged between the sealing ring pieces 7 at two ends, the ends of the sealing combined sleeves 9 are connected to the sides of the sealing arc seats 71, two end baffles 73 are arranged on the sides of the sealing arc seats 71 close to the ends of the core 8, the end baffles 73 are movably arranged on the test sealing cylinder 5, the end baffles 73 are abutted to the sides of the ends of the core 8, and the end baffles 73 are combined together, and water injection holes 74 are formed in the central position.
The sealing driving piece 4 is arranged on the sealing arc seat 71 and the sealing combined sleeve 9, the sealing driving piece 4 is provided with a pulling piece 41, the pulling piece 41 is arranged on the sealing combined sleeve 9, the pulling piece 41 can move outwards to pull the sealing combined sleeve 9 to a central position far away from the testing sealing cylinder 5, the sealing arc seat 71 can move inwards under the driving of the sealing driving piece 4, and the sealing bag 72 is driven to be in a state of tending to be full so as to drive the inner side of the sealing bag 72 to be attached to the outer wall of the rock core 8.
The high-pressure ball pump 10 is arranged on the test sample tube 1, the liquid injection pump 11 and the back pressure module 12 are connected to the test sealing cylinder 5, the liquid injection pump 11 injects liquid into the test sealing cylinder 5 to enter the core 8 through the water injection hole 74, the output end of the back pressure module 12 is connected with the liquid meter 13, and the back pressure module 12 is used for pumping the liquid penetrating through the core 8 to the liquid meter 13.
In the application, the sealing arc seat 71 is provided with the sealing bag 72, the sealing bag 72 seals the peripheral wall of the end part of the core 8, the sealing combination sleeve 9 is arranged between the sealing ring pieces 7, the sealing combination sleeve 9 seals in a mode of combining and sealing the inner sleeve 91 and the outer sleeve 92, wherein the inner sleeve 92 seals in a negative pressure sealing mode, the outer sleeve 92 pressurizes the inner sleeve 92 in an elastic pressurizing mode to ensure that the inner sleeve 92 is completely attached to the peripheral side of the core 8, test fluid is prevented from entering between the inner sleeve 91 and the core 8, the osmotic liquid is ensured to be completely discharged through the core 8, and the test measurement accuracy is improved.
The rock core 8 enters the test sample tube 1 from the high-pressure ball pump 10, and in order to ensure the environment in the test sample tube 1, the high-pressure pump can be arranged on the test sample tube 1, so that the test sample tube 1 is in an environment for keeping the rock core 8 stable.
In the application, the sealing bag 72 seals the peripheral side wall of the end part of the core 8, the sealing combined sleeve 9 seals the peripheral side wall of the end part far away from the core 8, the end baffle plate 73 seals the end part of the core 8, the end baffle plate 72 is of a semi-ring structure, and holes formed in the middle after the end baffle plate 72 are combined can be used for test fluid to enter the core, so that the permeability is calculated through the permeated fluid flow, wherein the end baffle plate 72 is of a movable structure, and particularly can be driven by a cylinder to realize movable combination.
In order to make the sealing bag 72 completely seal the peripheral wall of the end portion of the core 8, the application also designs that, as shown in fig. 5, the width of the inner side of the sealing bag 72 is larger than the width of the sealing bag 72 in the sealing arc seat 71 and is equal to the width of the sealing arc seat 71, and the adjacent sealing bags 72 are abutted against each other.
In practical application, the number of the seal bags 72 in one set is four, two seal bags 72 are abutted against each other, and adjacent seal bags 72 in the same set of seal bags 72 are abutted against each other, in addition, in order to ensure the sealing effect, as shown in fig. 6 and 7, the gaps between adjacent seal bags 72 in one set are far from the gaps between adjacent seal bags 72 in the other set, that is, the gaps between the seal bags 72 in the two sets are staggered, so that the seal bags 72 in the adjacent set can stop the gaps between the seal bags 72 corresponding to the set, and fluid permeation is avoided.
In the application, the sealing arc seat 71 is movable, when the core 8 does not enter the test sealing cylinder 5, the sealing bag 72 is far away from the position approximately corresponding to the outer wall of the core 8, when the core 8 enters the test sealing cylinder 5, the sealing bag 72 gradually contracts inwards to seal the outer peripheral wall of the end part of the core 8, therefore, the application adopts the following design, as shown in fig. 3 and 9, the sealing arc seat 71 is connected with the connecting column 75, the connecting column 75 penetrates the test sealing cylinder 5, the test sealing cylinder 5 is provided with the penetrating groove 76, the connecting column 75 penetrates the penetrating groove 76, the outer wall of the connecting column 75 is provided with the connecting raised strip 77, the inner wall of the penetrating groove 76 is provided with the groove 78, the connecting raised strip 77 is arranged on the groove 78 in a sliding way, and the connecting column 75 is arranged in the penetrating groove 76 in a sliding way.
As shown in fig. 2 and 3, the test seal cartridge 5 is provided with a mounting ring frame 42 outside, an internal thread is provided in the connecting column 75, a connecting screw 43 is provided in the connecting column 75, the connecting screw 43 is matched with the internal thread, the end of the connecting screw 43 is connected with a connecting rod 44, a slot 45 is provided on the mounting ring frame 42, the connecting rod 44 is arranged on the slot 45 in a penetrating manner, and the connecting rod 44 is rotatably arranged on the slot 45.
As shown in fig. 3 and 4, a connecting ring cavity 46 is provided in the mounting ring frame 42, a rotating toothed ring 47 is rotatably provided in the connecting ring cavity 46, a connecting toothed ring 48 is sleeved outside the connecting rod 44, the rotating toothed ring 47 is meshed with the connecting toothed ring 48, a driving gear 49 is meshed with the side edge of the rotating toothed ring 47, a driving motor 410 is connected to the driving gear 49, and the driving gear 49 is connected to the output end of the driving motor 410.
The driving motor 410 drives and drives the driving gear 49 to rotate, under the rotation action of the driving gear 49, the rotating toothed rings 47 are driven to rotate, each connecting toothed ring 49 is driven to rotate, the connecting rod 44 rotates on the mounting ring frame 42 through the connecting toothed rings 49, the position is unchanged, the connecting column 75 is provided with the connecting convex strips 77, the connecting convex strips 77 slide in the grooves 78, the connecting column 75 cannot rotate along with the rotation of the connecting rod 44, the connecting column 75 moves along the direction of the penetrating grooves 76 under the rotation of the connecting rod 44, so that the sealing arc seat 71 is driven to gradually approach the core 8, and the sealing bag 72 is driven to gradually abut against the outer wall of the core 8.
In order to make the sealing bag 72 completely fit on the outer wall of the core 8, as shown in fig. 4, the application also provides a design that the connecting screw 43 and the connecting rod 44 are provided with axial slots 411, both ends of the axial slots 411 are communicated, the sealing arc seat 71 is connected with a vent pipe 412, the end part of the vent pipe 412 penetrates through the sealing arc seat 71 and is communicated with the sealing bag 72, the vent pipe 412 penetrates through the inside of the connecting column 75 and the axial slots 411, and the outer end of the vent pipe 412 is connected with a high-pressure pump 413.
The high-pressure pump 413 is driven to inflate the sealing bag 72 through the vent pipe 412, and the sealing bag 72 gradually expands and completely fits on the outer wall of the core 8 under the action of gas pressure.
In the present application, the seal assembly 9 is shown in fig. 10, and the seal assembly 9 includes an inner sleeve 91 and an outer sleeve 92, the outer sleeve 92 is a rubber sleeve, the inner sleeve 91 is a structure capable of deforming under pressure, the inner sleeve 91 is provided with a connecting seat 93, the inside of the connecting seat 93 is communicated with a space between the inner sleeve 91 and the core 8, the outer sleeve 92 is provided with a connecting groove 94 for the connecting seat 93 to pass through, the bottom of the connecting seat 93 is provided with a rubber pad 95, and the rubber pad 95 is provided with an opening.
The outer end of the connecting seat 93 is connected with a second air pump 96, the pulling piece 41 is connected to the outer wall of the outer sleeve 92, a driving shaft 97 is arranged on the pulling piece 41, a lifting seat 98 is arranged on the connecting seat 93, and driving cylinders 99 are connected to the lifting seat 98 and the driving shaft 97.
In the above embodiment, the inner sleeve 91 is of a deformable structure under the action of pressure, the driving cylinder 99 drives the rubber pad 95 to abut against the outer wall of the core 8, the second air pump 96 drives the air between the inner sleeve 91 and the core 8 to be completely pumped away, so that the inner sleeve 91 and the core 8 are in a negative pressure state, the inner sleeve 91 is attached to the outer wall of the core 8 under the action of air pressure, and there may be a situation of incomplete attachment, at this time, the driving cylinder 99 drives the pulling piece 41 to be close to the inner sleeve 91, the outer sleeve 92 gradually tends to a natural state under the action of elasticity and is tightly attached to the outer wall of the inner sleeve 91, under the action of the pressure of the outer sleeve 92, the penetration fluid in the inner sleeve 91 can be avoided, and the outer sleeve 92 is not completely restored to the natural state when attached to the inner sleeve 91, so that the inner sleeve 92 is always subjected to the pressure from outside to inside when being bound.
Because the air is pumped away in the present application, the air is pumped away at the side of the sealing bag 72, so the end of the inner sleeve is attached to the side of the sealing bag 72, and the gap is completely covered.
According to the application, the core 8 is driven to move by the clamping pushing piece 6, the clamping pushing piece 6 comprises a push rod 61 and a gripper 62 connected to the end part of the push rod 61, and the gripper 62 clamps the core 8.
The driving unit 2 provides driving force for the translation of the push rod 61, and the driving unit 2 comprises a servo motor 21 and a driving screw 22 connected to the output end of the servo motor 21, wherein the driving screw 22 is matched with the push rod 61.
The servo motor 21 drives the driving screw 22 to rotate, drives the push rod 61 to translate, and drives the grip 62 to drive the core to translate, wherein the push rod 61 is limited, so that the driving screw 22 cannot be driven to rotate together when the driving screw 22 rotates, and the push rod 61 is driven to translate under the action of the rotation of the driving screw 22.
In the application, the high-pressure ball pump 10 can control whether the rock core 8 can be transported into the test seal cylinder 5, and the push rod 61 and the grip 62 push the rock core 8 into the test seal cylinder 5 when the ball port in the high-pressure ball pump 10 is opposite to the test seal cylinder 5.
In order to facilitate the movement of the sealing arc seat 71 and the movement of the sealing combination sleeve 9, the application is designed in such a way that the inner diameter of the test sealing cylinder 5 is larger than the inner diameter of the test sample tube 1.
In summary, the main implementation process of the application is as follows:
the rock core 8 enters the test sample tube 1 from the high-pressure ball pump 10, and when the ball port in the high-pressure ball pump 10 is adjusted to be right opposite to the test sealing cylinder 5, the servo motor 21 drives the driving screw 22 to rotate and the push rod 61 to translate, so that the gripper 62 is driven to drive the rock core 8 to translate into the test sealing cylinder 5;
the driving motor 410 drives the driving gear 49 to rotate, and under the rotation action of the driving gear 49, the rotating toothed rings 47 are driven to rotate, so that each connecting toothed ring 49 is driven to rotate, the connecting rod 44 rotates on the mounting ring frame 42 through the connecting toothed ring 49, under the rotation of the connecting rod 44, the connecting column 75 moves along the direction of the through groove 76, and the sealing arc seat 71 is driven to gradually approach the core 8, and the sealing bag 72 is driven to gradually abut against the outer wall of the core 8;
when the driving cylinder 99 drives the rubber pad 95 to abut against the outer wall of the core 8, the second air pump 96 drives the air between the inner sleeve 91 and the core 8 to be completely pumped away, so that the inner sleeve 91 and the core 8 are in a negative pressure state, the inner sleeve 91 is attached to the outer wall of the core 8 under the action of air pressure, the driving cylinder 99 drives the pulling piece 41 to be close to the inner sleeve 91, the outer sleeve 92 gradually tends to a natural state under the action of elasticity and is tightly attached to the outer wall of the inner sleeve 91, and the inner sleeve 91 can be prevented from being permeated by fluid under the action of the pressure of the outer sleeve 92;
the driving end baffles 72 are combined to form a water injection hole 74 in the middle, the liquid injection pump 11 injects liquid into the test seal cylinder 5, the liquid enters the core 8 through the water injection hole 74, and the back pressure module 12 pumps the liquid penetrating through the core 8 to the liquid meter 13, so that the permeability is calculated according to the fluid flow.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.
Claims (10)
1. A core permeability test device is characterized by comprising:
the driving unit (2) is arranged at the end part of the test sample tube (1), a test sealing cylinder (5) is arranged at the end part of the test sample tube (1) far away from the driving unit (2), a clamping pushing piece (6) is arranged in the test sample tube (1), and the clamping pushing piece (6) pushes the core (8) into the test sealing cylinder (5);
clamping seal structure (3), install in test seal section of thick bamboo (5), clamping seal structure (3) possess four at least groups sealing ring piece (7), sealing ring piece (7) are installed respectively the both ends of rock core (8), sealing ring piece (7) set up rock core (8) with between test seal section of thick bamboo (5) inner wall, sealing ring piece (7) are including a plurality of seal arc seat (71) that set up along circumference, be provided with seal bag (72) on seal arc seat (71), seal bag (72) inner wall with rock core (8) outer wall laminating, wherein adjacent of one set of clearance between seal bag (72) is kept away from the position of clearance between adjacent of another set between seal bag (72), be provided with seal combination cover (9) between sealing ring piece (7) at both ends, seal combination cover (9) end connection are in seal arc seat (71) side, seal arc seat (71) are close to side of rock core (8) tip is provided with both ends (73), seal baffle (73) are in end (73) are in the side of being provided with on test baffle (8), the end baffles (73) are combined together and a water injection hole (74) is formed at the central position of the end baffles;
the sealing driving piece (4) is arranged on the sealing arc seat (71) and the sealing combined sleeve (9), the sealing driving piece (4) is provided with a pulling piece (41), the pulling piece (41) is arranged on the sealing combined sleeve (9), the pulling piece (41) can move outwards to pull the sealing combined sleeve (9) to a position far away from the center of the testing sealing cylinder (5), and the sealing arc seat (71) can move inwards and drive the sealing bag (72) to be in a filling state so as to drive the inner side of the sealing bag (72) to be attached to the outer wall of the core (8) under the driving of the sealing driving piece (4);
the high-pressure ball pump (10) is arranged on the test sample tube (1), the liquid injection pump (11) and the back pressure module (12) are connected to the test sealing cylinder (5), the liquid injection pump (11) injects liquid into the test sealing cylinder (5) to enter the core (8) through the water injection hole (74), the output end of the back pressure module (12) is connected with the liquid meter (13), and the back pressure module (12) is used for pumping the liquid penetrating through the core (8) to the liquid meter (13).
2. The core permeability testing apparatus according to claim 1, wherein the width of the inside of the sealing bladder (72) is greater than the width of the sealing bladder (72) within the sealing arc seat (71) and equal to the width of the sealing arc seat (71);
the adjacent sealing bags (72) are abutted against each other.
3. Core permeability test device according to claim 2, characterized in that the sealing arc seat (71) is connected with a connecting column (75), the connecting column (75) penetrates through the test sealing cylinder (5), a through groove (76) is formed in the test sealing cylinder (5), the connecting column (75) penetrates through the through groove (76), a connecting raised strip (77) is arranged on the outer wall of the connecting column (75), a groove (78) is formed in the inner wall of the through groove (76), and the connecting raised strip (77) is slidably arranged on the groove (78);
the connecting column (75) is slidably arranged in the through groove (76).
4. The core permeability testing device according to claim 3, wherein a mounting ring frame (42) is arranged outside the testing sealing cylinder (5), an internal thread is arranged in the connecting column (75), a connecting screw rod (43) is arranged in the connecting column (75), and the connecting screw rod (43) is matched with the internal thread;
the connecting screw rod (43) end connection has connecting rod (44), set up fluting (45) on installing ring frame (42), connecting rod (44) run through and set up on fluting (45) just connecting rod (44) rotate and install on fluting (45).
5. The core permeability testing apparatus according to claim 4, wherein a connecting ring cavity (46) is provided in the mounting ring frame (42), a rotating toothed ring (47) is rotatably provided in the connecting ring cavity (46), a connecting toothed ring (48) is sleeved outside the connecting rod (44), and the rotating toothed ring (47) is meshed with the connecting toothed ring (48);
the side of the rotary toothed ring (47) is meshed with a driving gear (49), the driving gear (49) is connected with a driving motor (410), and the driving gear (49) is connected with the output end of the driving motor (410).
6. The core permeability testing device according to claim 5, wherein the connecting screw (43) and the connecting rod (44) are provided with axial slots (411), and two ends of the axial slots (411) are communicated;
the sealing arc seat (71) is connected with a vent pipe (412), the end part of the vent pipe (412) penetrates through the sealing arc seat (71) and is communicated with the sealing bag (72), the vent pipe (412) penetrates through the connecting column (75) and the axial groove (411), and the outer end of the vent pipe (412) is connected with a high-pressure pump (413).
7. The core permeability testing apparatus according to claim 6, wherein the sealing assembly (9) comprises an inner jacket (91) and an outer jacket (92);
the utility model discloses a drilling tool for drilling a hole in a rock core, including cover (92) is the rubber sleeve, endotheca (91) is the structure of being out of shape under the pressure effect, be provided with connecting seat (93) on endotheca (91), connecting seat (93) inside with space intercommunication between endotheca (91) with rock core (8), offer on overcoat (92) confession connecting seat (93) pass spread groove (94), connecting seat (93) bottom is provided with rubber pad (95), open pore has been offered on rubber pad (95).
8. The core permeability testing apparatus according to claim 7, wherein the outer end of the connecting seat (93) is connected with a second air pump (96);
the utility model discloses a lifting device, including pull piece (41), overcoat (92) outer wall, pull piece (41) are installed and are connected outside overcoat (92), be provided with drive shaft (97) on pull piece (41), install lifting seat (98) on connecting seat (93), lifting seat (98) with all be connected with on drive shaft (97) actuating cylinder (99).
9. The core permeability testing apparatus according to claim 8, wherein the grip pusher (6) comprises a push rod (61), a grip (62) connected to an end of the push rod (61);
the gripper (62) clamps the core (8);
the driving unit (2) comprises a servo motor (21) and a driving screw rod (22) connected to the output end of the servo motor (21), and the driving screw rod (22) is matched with the push rod (61).
10. Core permeability testing apparatus according to claim 9, characterized in that the push rod (61) and the grip (62) push the core (8) into the test seal cartridge (5) when a ball port in the high pressure ball pump (10) is facing into the test seal cartridge (5);
the inner diameter of the test sealing cylinder (5) is larger than the inner diameter of the test sample tube (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311090761.6A CN116818632B (en) | 2023-08-29 | 2023-08-29 | Core permeability testing device |
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| CN202311090761.6A CN116818632B (en) | 2023-08-29 | 2023-08-29 | Core permeability testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435537A (en) * | 2011-11-21 | 2012-05-02 | 中国石油大学(华东) | Measuring device for gas permeability of coal rock core |
| CN104359819A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Device and method for determining gas-water relative permeability of low-infiltration dense rock core |
| CN112362558A (en) * | 2020-12-09 | 2021-02-12 | 中国地质大学（北京） | Anisotropic relative permeability testing arrangement |
| CN215598958U (en) * | 2021-09-10 | 2022-01-21 | 中国石油大学(北京) | Rock core holder and rock core radial permeability measuring device |
| CN116223331A (en) * | 2022-12-12 | 2023-06-06 | 南通市飞宇石油科技开发有限公司 | Core holder for testing shale oil |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0112903D0 (en) * | 2001-05-26 | 2001-07-18 | Univ Heriot Watt | Permeability measurement apparatus and method |
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- 2023-08-29 CN CN202311090761.6A patent/CN116818632B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435537A (en) * | 2011-11-21 | 2012-05-02 | 中国石油大学(华东) | Measuring device for gas permeability of coal rock core |
| CN104359819A (en) * | 2014-11-10 | 2015-02-18 | 中国石油天然气股份有限公司 | Device and method for determining gas-water relative permeability of low-infiltration dense rock core |
| CN112362558A (en) * | 2020-12-09 | 2021-02-12 | 中国地质大学（北京） | Anisotropic relative permeability testing arrangement |
| CN215598958U (en) * | 2021-09-10 | 2022-01-21 | 中国石油大学(北京) | Rock core holder and rock core radial permeability measuring device |
| CN116223331A (en) * | 2022-12-12 | 2023-06-06 | 南通市飞宇石油科技开发有限公司 | Core holder for testing shale oil |
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