CN105973919B - Core holding unit - Google Patents
Core holding unit Download PDFInfo
- Publication number
- CN105973919B CN105973919B CN201610607304.3A CN201610607304A CN105973919B CN 105973919 B CN105973919 B CN 105973919B CN 201610607304 A CN201610607304 A CN 201610607304A CN 105973919 B CN105973919 B CN 105973919B
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- China
- Prior art keywords
- plug
- packing element
- confining pressure
- positioning
- autoclave body
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- 238000012856 packing Methods 0.000 claims abstract description 103
- 229920006351 engineering plastic Polymers 0.000 claims abstract description 26
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 18
- 239000004917 carbon fiber Substances 0.000 claims abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 15
- 210000004907 gland Anatomy 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 239000011435 rock Substances 0.000 claims description 56
- 239000000463 material Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- 238000007667 floating Methods 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000036316 preload Effects 0.000 claims description 10
- 230000003746 surface roughness Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 16
- 238000007789 sealing Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 206010034719 Personality change Diseases 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
Landscapes
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of core holding units for oil exploration and exploitation field.Core holding unit of the present invention includes confining pressure autoclave body, position plug, adjust plug, packing element component, space between the packing element component and the confining pressure autoclave body is formed with confining pressure chamber, the confining pressure autoclave body is carbon fiber-metal-engineering plastic composite material structure, the confining pressure autoclave body includes the metal structure fillet of screw for being separately fixed at confining pressure autoclave body both ends, it is laid on the shell of the carbon fiber on the outside of the fillet of screw, the liner of the engineering plastics to fit with the inner wall of the shell, the liner both ends abut the positioning plug and the adjusting plug respectively, gland nut is equipped on the positioning plug and the adjusting plug, the gland nut is fixedly connected on the fillet of screw, and the gland nut is fixed the positioning plug and the adjusting plug.Its purpose is to provide a kind of composite construction core holding unit suitable for high temperature and high pressure environment.
Description
Technical field
The present invention relates to oil exploration and exploitation fields, more particularly to a kind of core holding unit.
Background technique
Rock is the main object of geological prospecting, is by one or more mineral compositions, with certain structure construction
Aggregate.The structure of rock describes the change procedure of geology as painting and calligraphy, to the analysis of rock texture can confirm that geology at
Point, rock properties and characteristics and geologic change process feature.
Core holding unit be it is a kind of clamping and sealing rock core, complete core permeability, porosity test or various rock cores drive
For the special arrangement of experiment, major function is to be put into core sample to be measured or to be tested wherein, and guarantee to test fluid
When by core sample rear and front end, the side surface of rock sample can be fully sealed.
CT core holding unit can be used for the pore structure of X-ray scanning column core sample, study core parameters with hole
Flowing pressure changing rule, and the structure of two-dimensional section and three-dimensional space can be carried out under conditions of not destroying sample interior
Reconstruct, quantitative nondestructive analysis sample.Realize real time on-line monitoring heterosphere in each interval fluid saturation along journey be distributed,
Also observe that crossflow phenomenon.
Existing core holding unit mainly includes gum cover, plug, the confining pressure autoclave body of two ends etc..Use core holding unit
When, rock core is put into inside gum cover, both ends are blocked with plug, are integrally put into confining pressure autoclave body.Test process passes through plug side
End fluid is injected into rock core, while injecting high-pressure fluid into confining pressure autoclave body, to keep the pressure outside confining pressure gum cover
Higher than gum cover internal pressure, gum cover can be extruded on rock core, guarantee that the fluid inside injection gum cover can be out of rock core
Portion passes through, without the gap seepage flow along collet and rock core.
The confining pressure autoclave body of common core holding unit is metal material, but metal is strong to the absorbability of X-ray, and X is penetrated
Line is absorbed when penetrating the confining pressure autoclave body of metal, so the scanning to rock core is ineffective.So current CT core holding unit
Confining pressure autoclave body be largely engineering plastics material.Engineering plastics are also relatively strong to the absorbability of X-ray, so confining pressure autoclave body
Wall thickness cannot be too big, and which limits the use pressure of core holding unit, so the operating pressure of general CT core holding unit
It is lower；Bearing capacity can reduce engineering plastics at high operating temperatures, so cannot work at high operating temperatures；Due to engineering plastics
The bearing capacity of itself is lower, so the internal diameter of confining pressure autoclave body cannot be too big, so being generally only applicable to 1 English of analysis detection diameter
Very little core sample below.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of composite construction rock core clampings suitable for high temperature and high pressure environment
Device.
Core holding unit of the present invention, including confining pressure autoclave body, it is stifled positioned at the positioning plug at confining pressure autoclave body both ends and adjusting
Head, and in the confining pressure autoclave body and be fixed on it is described positioning plug and it is described adjust plug between packing element component,
Be characterized in that: the space between the packing element component and the confining pressure autoclave body is formed with confining pressure chamber, and the confining pressure autoclave body is carbon fiber
Dimension-metal-engineering plastic composite material structure, the confining pressure autoclave body include the metal for being separately fixed at confining pressure autoclave body both ends
The structure fillet of screw, the shell for the open column shape carbon fiber being laid on the outside of the fillet of screw fit with the inner wall of the shell
And both ends connect the liner of the fillet of screw, the material of the liner is engineering plastics, described in the liner both ends abut respectively
Plug and the adjusting plug are positioned, is equipped with gland nut, the compression spiral shell on the positioning plug and the adjusting plug
Set is fixedly connected on the fillet of screw, and the gland nut is fixed the positioning plug and the adjusting plug.
Core holding unit of the present invention, wherein the packing element component includes the packing element of radially fixed rock core, is fastened in institute respectively
The fixation packing element positioning sleeve and floating packing element positioning sleeve at packing element both ends are stated, the fixed packing element positioning sleeve is connected to the positioning plug
Head in, the floating packing element positioning sleeve is connected in the adjusting plug, the packing element component respectively with the positioning plug and
The adjusting plug connection is formed with packing element chamber.
Core holding unit of the present invention, wherein packing element is intracavitary is equipped with injection plug and output plug, injects plug and output is stifled
Head is equipped with filling tube for clamping rock core, the injection plug, and the output plug is equipped with discharge hole, the packing element component
The interior close adjusting plug side, which is equipped with, adjusts sleeve, and described adjusting sleeve one end abuts the injection plug, the other end supports
It is connected to front end pre-load nut, the front end pre-load nut is fixed on the adjusting plug, and the adjusting sleeve is equipped with a variety of rulers
It is very little.
Core holding unit of the present invention, wherein the lateral surface at the floating packing element positioning sleeve both ends is set as cone structure, it is described
Fixed packing element positioning sleeve is equipped with cone structure close to packing element one end, and the other end is equipped with thread segment, and the thread segment is connected to described
It positions on plug.
Core holding unit of the present invention, wherein the range of detection rock core length is 30-120mm, packing element in the packing element component
Radial dimension is 1 inch or 1.5 inches.
Core holding unit of the present invention, wherein the packing element is equipped with pressure-measuring-point, the pressure-measuring-point is equipped with pressure pipe
Line, the material of the pressure pipeline are engineering plastics.
Core holding unit of the present invention, wherein the intracavitary filling confining pressure liquid of the confining pressure, the positioning plug and described adjust are blocked up
Head is equipped with heating rod, and the hot zone of the heating rod is immersed in the confining pressure liquid, and the heating rod individually regulates and controls.
Core holding unit of the present invention, wherein the contact surface of the adjusting plug and the positioning plug and the liner is equipped with
Anti-leak seal, the contact surface roughness of the anti-leak seal are 1.6.
Core holding unit of the present invention, wherein the outer circle of the fillet of screw is equipped with the locating slot being axially distributed and radial distribution
Fixing slot.
Core holding unit of the present invention, wherein the inner wall of the fillet of screw is threadedly coupled with the gland nut.
Core holding unit difference from prior art of the present invention is: the confining pressure body material of core holding unit of the present invention
For carbon fiber-engineering plastics-metal composite structure, the fillet of screw group of the shell of carbon fiber, the liner of engineering plastics and metal
The fillet of screw high temperature high voltage resistant ability of confining pressure autoclave body made of conjunction, metal material is strong, and is located at the both ends of confining pressure autoclave body, sweeps to CT
The ray interference for retouching process is small；The material of shell be carbon fiber, carbon fiber it is small to ray absorption capacity and within 200 DEG C performance
Stablize, improves the precision of test result；The material of liner is engineering plastics, and the surface roughness precision of engineering plastics is high, interior
Lining sealing confining pressure liquid effect is good, and enclosure material is carbon fiber, reduces the thickness of the liner of engineering plastics, weakens engineering
Interference of the plastics to ray scanning effect, ensure that the accuracy of test result.
Core holding unit difference from prior art of the present invention also resides in: the packing element of core holding unit of the present invention is intracavitary to be set
There is adjusting sleeve, the change of the intracavitary rock core size of packing element can adjust sleeve by increase and decrease to control the fixation of rock core, operation letter
Just, structure is simple.
Core holding unit difference from prior art of the present invention also resides in: the positioning plug of core holding unit of the present invention and
It adjusts plug and is equipped with heating rod, heating rod directly heats the intracavitary confining pressure liquid of confining pressure, reduces temperature diffusion, heating effect
It is good, and the opening and closing of heating rod individually controls, and facilitates the temperature for adjusting hot spot and controlling confining pressure liquid.
Core holding unit of the invention is described further with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the overall structure cross-sectional view of core holding unit of the present invention；
Fig. 2 is the A of core holding unit Fig. 1 of the present invention to structural schematic diagram；
Fig. 3 is B-B structural schematic diagram in core holding unit Fig. 2 of the present invention；
Fig. 4 is the confining pressure kettle structure schematic diagram of core holding unit of the present invention；
Fig. 5 is the packing element component and its accessory structure schematic diagram inside core holding unit of the present invention；
Fig. 6 is C-C structure sectional view in core holding unit Fig. 2 of the present invention.
Attached drawing mark: 1, confining pressure autoclave body；11, liner；12, shell；13, the fillet of screw；14, support base；15, confining pressure chamber；2,
Packing element component；21, packing element；22, floating packing element positioning sleeve；23, fixed packing element positioning sleeve；24, sleeve is adjusted；25, pre-load nut；
26, sealing element；27, location nut；3, rock core；31, output plug；311, discharge hole；32, plug is injected；321, filling tube；
33, pressure-measuring-point；34, pressure pipeline；4, plug is adjusted；41, exhaust pipe；42, liquid injection pipe；5, plug is positioned；51, heating rod；
52, metal pipe line cutting ferrule；521, metal pipe line；53, anti-leak seal；54, temperature sensor；55, pressure transmission hole；56, pipeline card
Set；6, gland nut.
Specific embodiment
As shown in Figure 1 and Figure 4, core holding unit of the present invention includes mainly columnar confining pressure autoclave body 1, is fixedly supported on
The support base 14 of 1 outer wall of confining pressure autoclave body, confining pressure autoclave body 1 include shell 12, liner 11 and the fillet of screw 13, the both ends of confining pressure autoclave body 1
It is respectively fixedly connected with and adjusts plug 4 and positioning plug 5, the internal screw thread of the fillet of screw 13 and the outer spiral shell of gland nut 6 on confining pressure autoclave body 1
Line connection, the inner ring of gland nut 6, which is fixed, adjusts plug 4 and positioning plug 5, and adjusting plug 4 and positioning plug 5 are distinguished
It is fixed on the both ends of confining pressure autoclave body 1.
Adjusting plug 4 and the sealing for positioning plug 5 and confining pressure autoclave body 1 adjust plug 4 and determine mainly by anti-leak seal 53
It is equipped with seal groove on the plug 5 of position, anti-leak seal 53 is fixed in seal groove, anti-leak seal 53 selects O-ring seal, O-shaped
Character change will not occur in 180 DEG C for the material selection fluorubber of sealing ring, fluorubber, and high temperature high voltage resistant ability is strong, makes rock
Heart clamp holder can carry out test with pressure under the conditions of 180 DEG C, improve the safety coefficient of core holding unit, guarantee test process peace
It is complete to stablize.
Confining pressure autoclave body 1 is carbon fiber-engineering plastics-metal material composite construction, and confining pressure autoclave body 1 includes being separately fixed to enclose
Press the metal structure fillet of screw 13 at 1 both ends of autoclave body, the open column shape carbon fiber for being laid on the outside of the fillet of screw 13 shell 12, with it is outer
The inner wall of shell 12 fits and the liner 11 of both ends connection screw thread circle 13, and the material of liner 11 is engineering plastics.
The shell 12 of carbon fiber is to directly overlay the fillet of screw 13 and liner 11 by the mixture of carbon fiber and potting resin
Outer surface be process.Carbon fibre material has high temperature resistant, intensity height, without creep, good corrosion resistance, and X-ray transparent is good
The features such as, it can adapt to core holding unit and work at high temperature under high pressure, and can clearly be observed under the conditions of X-ray scanning
The pore structure of rock core 3 inside autoclave body.
The material selection stainless steel of the fillet of screw 13, stainless hardness of steel hardness good combination property, high temperature high voltage resistant ability are strong；And
The fillet of screw 13 is located at the both ends of confining pressure autoclave body 1, small to the ray interference of CT scan process；The material of shell 12 is carbon fiber, carbon
Fiber is small to ray absorption capacity and performance is stablized within 200 DEG C, improves the precision of test result；The material of liner 11 is
The surface roughness precision of engineering plastics, engineering plastics is high, and the effect that liner 11 seals confining pressure liquid is good, and 12 material of shell is
Carbon fiber reduces the thickness of the liner 11 of engineering plastics, weakens interference of the engineering plastics to ray scanning effect, ensure that
The accuracy of test result.
The outer circle of the fillet of screw 13 is equipped with the locating slot being axially distributed, and locating slot is wave-shaped trench, and wave-shaped trench is real
Show axially position, improves the axial bonding strength of the fillet of screw 13 Yu carbon fiber；Annular point is equipped with perpendicular to wave-shaped trench
The fixing slot of the strip of cloth, fixing slot improve the radially connected intensity of the fillet of screw 13 Yu carbon fiber, prevent 13 turns of the fillet of screw
It is dynamic.The fillet of screw 13 of metal structure can bear biggish pulling force and torque, ensure that the connection between the fillet of screw 13 and shell 12
Intensity, when the structure of the fillet of screw 13 can guarantee that core holding unit works under high pressure, the fillet of screw 13 can be with carbon fiber
Shell 12 closely connect, opposite slide will not occur.
Anti-leak seal 53 will realize that sealing function requirement anti-leak seal 53 is with the contact surface roughness of liner 11
1.6, the roughness of carbon fibre material is extremely difficult to this machining accuracy, and the face seal effect of engineering plastics is good, so rock core
Clamper is equipped with the liner 11 of engineering plastics, and 11 major function of liner of engineering plastics is to realize sealing, suffered by liner 11
Internal pressure is balanced by the carbon fiber skin 12 of outer layer, while proof strength requires, reduces the thickness of confining pressure autoclave body 1
Degree.
As shown in Figure 1 and Figure 5, packing element component 2 includes the packing element 21 of radially fixed rock core 3, is fastened in 21 liang of packing element respectively
The fixation packing element positioning sleeve 23 and floating packing element positioning sleeve 22 at end, fixed packing element positioning sleeve 23 are connected in positioning plug 5, float
Packing element positioning sleeve 22, which is connected to, to be adjusted in plug 4, and packing element component 2 is connected to form packing element with positioning plug 5 and adjusting plug 4 respectively
Chamber.The intracavitary fixed rock core of packing element, 3 both ends of rock core abut respectively injection plug 32 and output plug 31, injects on plug 32 and sets
There is filling tube 321, output plug 31 is equipped with discharge hole 311, and close 4 side of plug that adjusts is equipped with adjusting set in packing element component 2
Cylinder 24, adjusting 24 one end of sleeve abuts injection plug 32, other end abutting has pre-load nut 25, and pre-load nut 25 is fixed on adjusting
On plug 4, the dimension adjustable of sleeve 24 is adjusted, positions in plug 5 and is fixed with location nut 27.
During test, first positioning plug 5 and adjusting plug 4 are mounted on confining pressure autoclave body 1, then output plug 31 is pacified
In positioning plug 5, and it is fixed with location nut 27.Rock core 3, injection 32 and of plug are successively filled in from 4 one end of plug is adjusted
Sleeve 24 is adjusted, sleeve 24 is adjusted and is chosen according to 3 length of rock core, then locked with pre-load nut 25, rock core 3 installs.
The both ends of rock core 3 pass through injection plug 32 respectively and output plug 31 is fixed, and inject on plug 32 and are connected with filling tube
321, filling tube 321 to rock core 3 inject fluid, fluid can be gas or liquid, by rock core 3 fluid flow state come
The structural parameters of rock core 3 are indicated, fluid flows out after passing through rock core 3 along discharge hole 311.At the same time, packing element component 2 and confining pressure kettle
Space between body 1 is formed with confining pressure chamber 15, injects confining pressure liquid into confining pressure chamber 15 along the liquid injection pipe 42 adjusted on plug 4, encloses
Air in pressure chamber 15 is discharged by exhaust pipe 41, prevents air from accumulating in confining pressure chamber 15 pressure point influenced in confining pressure chamber 15
Cloth；The pressure of confining pressure liquid outside packing element 21 is higher than the internal pressure of packing element 21, guarantees that packing element 21 can be extruded on rock core 3,
Guarantee that the fluid inside injection packing element 21 can pass through inside rock core 3, without the gap seepage flow along packing element 21 and rock core 3.
It is identical as 4 structure of plug is adjusted to position plug 5, liquid injection pipe 42 and exhaust pipe 41 also can be set on positioning plug 5.
Packing element 21 selects fluorubber material, and high temperature high voltage resistant ability is strong, interferes ray scanning small；And fluorubber material
Under the high pressure effect of confining pressure liquid, the contact surface of packing element 21 and rock core 3 is compressed, reduces the gap between rock core 3 and packing element 21,
It prevents detection process from percolation phenomenon occur, improves detection accuracy.Packing element 21 is equipped with pressure-measuring-point 33, and pressure-measuring-point 33 is located at glue
The contact surface of cylinder 21 and rock core 3, measures the pressure on 3 surface of rock core, and pressure-measuring-point 33 is equipped with pressure pipeline 34, pressure pipeline 34
Material be engineering plastics, engineering plastics can reduce interference when ray scanning；Plug 5 is positioned close to the side of confining pressure chamber 15
Equipped with pipeline cutting ferrule 56, and plug 5 is positioned equipped with the pressure transmission hole 55 coaxial with pipeline cutting ferrule 56, pressure pipeline 34 extends to
In pipeline cutting ferrule 56, pipeline cutting ferrule 56 supports and fixes pressure pipeline 34, and pressure pipeline 34 passes through pipeline cutting ferrule 56 and pressure transmission hole
55 connections；The outside of positioning plug 5 is connected with metal pipe line 521, and metal pipe line 521 is connected to pressure transmission hole 55, positions on plug 5
Equipped with the metal pipe line cutting ferrule 52 for fixing metal pipe line 521, pressure sensor, pressure sensor are connected on metal pipe line 521
Carry out the measurement of pressure, it is convenient that pressure in packing element 21 is monitored, guarantee test parameter it is accurate.
The fixed packing element positioning sleeve 23 of both ends difference cutting ferrule and floating packing element positioning sleeve 22 of packing element 21, fixed packing element positioning sleeve
23 be connected to positioning plug 5 in, floating packing element positioning sleeve 22 be connected to adjust plug 4 in, packing element component 2 respectively with positioning plug
5 are connected to form packing element chamber with plug 4 is adjusted.The end of floating packing element positioning sleeve 22 and fixed packing element positioning sleeve 23 is designed with circular cone
Face, circular conical surface are inserted into inside packing element 21 and carry out axial limiting.Fixed 23 other end of packing element positioning sleeve has thread segment, and thread segment is tightened
On positioning plug 5,22 other end of floating packing element positioning sleeve, which is inserted directly into, to be adjusted in plug 4.Adjusting plug 4, positioning plug 5
In the case that position is fixed, packing element 21 has carried out axial direction by the floating packing element positioning sleeve 22 and fixed packing element positioning sleeve 23 at both ends
Positioning.
Floating packing element positioning sleeve 22 is biconical surface structure convenient for the fixed and positioned of packing element 21.When packing element 21 is installed, first will
Fixed packing element positioning sleeve 23 is threadedly coupled with positioning plug 5, then packing element 21 is fixed on to the circular cone of fixed packing element positioning sleeve 23
On face, the circular conical surface of 21 other end of packing element and floating packing element positioning sleeve 22 is clamped, and is then partially loaded confining pressure for what is be installed
Autoclave body 1, and installation and adjustment plug 4, then held out against with gland nut 6 by plug 4 is adjusted；Circular conical surface on floating packing element positioning sleeve 22
Structure is able to guide packing element component 2 and enters adjusting plug 4, and the installation positioning for guaranteeing packing element component 2 rapidly and accurately, shortens equipment installation
Time improves test efficiency.
Sealing element 26, the material selection of sealing element 26 are equipped on floating packing element positioning sleeve 22 and fixed packing element positioning sleeve 23
Fluorubber, the sealing effect in 26 energy contact-enhancing face of sealing element, guarantees sealing performance in confining pressure chamber 15, prevents confining pressure liquid from revealing.
The range that packing element component 2 detects 3 length of rock core is 30-120mm, and the radial dimension of packing element 21 is 1 inch or 1.5 English
It is very little.The cylindrical-shaped structure that rock core 3 is 1 inch or 1.5 inches of diameter by pre-treatment, the length range of rock core 3 are 30-120mm.
It injects 32 one end of plug and abuts fixed rock core 3, the other end, which abuts, adjusts sleeve 24, and the other end for adjusting sleeve 24, which abuts, pre-tightens spiral shell
Mother 25, pre-load nut 25, which is threaded in, to be adjusted in plug 4, is played the role of axially position and is adjusted sleeve 24 and packing element component 2.
The length for adjusting sleeve 24 has tri- kinds of specifications of 40mm, 60mm, 80mm, and suitable adjusting set can be selected according to the length of rock core 3
Cylinder 24, the adjusting sleeve 24 of plurality of specifications can make core holding unit be suitable for the rock core 3 of larger lengths range, expand equipment
Detection range.The radial dimension of packing element 21 is 1 inch or 1.5 inches, and the rock core 3 of different size can detect different parameters,
Expand the detection range of rock core 3.
After the completion of test, pressure inside confining pressure of releasing chamber 15 and packing element 21 successively dismantles the preload spiral shell of confining pressure autoclave body 1
Mother 25, location nut 27, injection plug 32, output plug 31 and adjusting sleeve 24, the center of packing element component 2 are 1 inch
Or 1.5 inches of cylindrical hole, rock core 3 can be poured out from any end or be released with thin bar, be then added from any end new
Rock core 3, replace rock core 3 during, the confining pressure liquid in confining pressure chamber 15, which is sealed in confining pressure chamber 15, will not flow out, thus replacement
The safe operation process of rock core 3 is convenient.
As shown in Figures 2 and 3, positioning plug 5 and adjusting plug 4 are equipped with heating rod 51, and heating rod 51 is set as four 50
Watt electrically heated rod, four electrically heated rods adjust plug 4 and positioning plug 5 on install two respectively.The fever of electrically heated rod
Area is in end；The hot zone of heating rod 51 is immersed in confining pressure liquid, and use is safe.The control system of core holding unit is to four electricity
Heating rod independently controls, and according to different can need that multiple power is selected to be heated.
As shown in Figure 2 and Figure 6, positioning plug 5 is equipped with temperature sensor 54, and temperature sensor 54 is able to detect confining pressure liquid
Temperature, facilitate carry out real-time monitoring, prevent confining pressure liquid temperature anomaly that test effect is not achieved or accident occurs, can not only monitor
Test carries out effect, moreover it is possible to guarantee test safety.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (7)
1. a kind of core holding unit, including confining pressure autoclave body (1) are located at the positioning plug (5) at confining pressure autoclave body (1) both ends and adjust
Save plug (4), and be located in the confining pressure autoclave body (1) and be fixed on the positioning plug (5) and the adjusting plug (4) it
Between packing element component (2), it is characterised in that: the space between the packing element component (2) and the confining pressure autoclave body (1), which is formed with, encloses
It presses chamber (15), the confining pressure autoclave body (1) is carbon fiber-metal-engineering plastic composite material structure, confining pressure autoclave body (1) packet
On the outside of including and be separately fixed at the metal structure fillet of screw (13) at confining pressure autoclave body (1) both ends, being laid on the fillet of screw (13)
Carbon fiber shell (12), fit with the inner wall of the shell (12) and both ends connect the liners of the fillet of screw (13)
(11), the material of the liner (11) is engineering plastics, and liner (11) both ends abut the positioning plug (5) and institute respectively
It states and adjusts plug (4), be equipped with gland nut (6) on the positioning plug (5) and the adjusting plug (4), the compression spiral shell
Set (6) be fixedly connected on the fillet of screw (13), and the gland nut (6) be fixed the positioning plug (5) and
The adjusting plug (4)；
The packing element component (2) is connected to the positioning plug (5) and the adjusting plug (4) respectively and is formed with packing element chamber, institute
It states intracavitary be equipped with of packing element and injects plug (32) and output plug (31), close to the adjusting plug (4) in the packing element component (2)
Side, which is equipped with, adjusts sleeve (24), and the adjusting sleeve (24) one end abuts injection plug, other end abutting has pre-load nut
(25), the pre-load nut (25) is fixed on the adjusting plug (4)；
The packing element component (2) includes the packing element (21) of radially fixed rock core (3), is fastened in the packing element (21) both ends respectively
Fixed packing element positioning sleeve (23) and floating packing element positioning sleeve (22), the fixed packing element positioning sleeve (23) are connected to the positioning plug
In head (5), the floating packing element positioning sleeve (22) is connected in the adjusting plug (4)；
For clamping rock core (3), the injection plug (32) is equipped with for the injection plug (32) and the output plug (31)
Filling tube (321), the output plug (31) are equipped with discharge hole (311), and the adjusting sleeve (24) is equipped with sizes；
The lateral surface at floating packing element positioning sleeve (22) both ends is set as cone structure, and the fixed packing element positioning sleeve (23) is close
Packing element (21) one end is equipped with cone structure, and the other end is equipped with thread segment, and the thread segment is connected on the positioning plug (5).
2. core holding unit according to claim 1, it is characterised in that: the packing element component (2) interior rock core (3) length
Range is 30-120mm, and packing element (21) radial dimension is 1 inch or 1.5 inches.
3. core holding unit according to claim 1, it is characterised in that: the packing element (21) is equipped with pressure-measuring-point
(33), the pressure-measuring-point (33) is equipped with pressure pipeline (34), and the material of the pressure pipeline (34) is engineering plastics.
4. core holding unit according to claim 1, it is characterised in that: fill confining pressure liquid, institute in the confining pressure chamber (15)
It states positioning plug (5) and the adjusting plug (4) is equipped with heating rod (51), the hot zone of the heating rod (51) is immersed in institute
It states in confining pressure liquid, the heating rod (51) individually regulates and controls.
5. core holding unit according to claim 1, it is characterised in that: the adjusting plug (4) and the positioning plug
(5) anti-leak seal (53) are equipped with the contact surface of the liner (11), the contact surface roughness of the anti-leak seal (53)
It is 1.6.
6. core holding unit according to claim 1, it is characterised in that: the outer circle of the fillet of screw (13) is equipped with axial
The locating slot of distribution and radially-arranged fixing slot.
7. core holding unit according to claim 1, it is characterised in that: the inner wall of the fillet of screw (13) and the compression
Swivel nut (6) is threadedly coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610607304.3A CN105973919B (en) | 2016-07-28 | 2016-07-28 | Core holding unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610607304.3A CN105973919B (en) | 2016-07-28 | 2016-07-28 | Core holding unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105973919A CN105973919A (en) | 2016-09-28 |
| CN105973919B true CN105973919B (en) | 2019-07-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610607304.3A Expired - Fee Related CN105973919B (en) | 2016-07-28 | 2016-07-28 | Core holding unit |
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| Country | Link |
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| CN (1) | CN105973919B (en) |
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| CN106706684B (en) * | 2017-02-20 | 2024-04-05 | 中国石油大学(北京) | Core holder for CT scanning |
| CN107044935A (en) * | 2017-04-26 | 2017-08-15 | 中国石油大学(华东) | The core holding unit and its method of work of a kind of rock fever fracturing experiment |
| CN107014676B (en) * | 2017-05-11 | 2024-06-11 | 上海岩间机电科技有限公司 | High-pressure wide-temperature clamp holder for high-axial stress carbon fiber |
| CN107389458A (en) * | 2017-06-23 | 2017-11-24 | 北京交通大学 | Balancing gate pit based on carbon fibre composite |
| CN107201899A (en) * | 2017-07-27 | 2017-09-26 | 张艳红 | Formation fluid pressure measurement apparatus |
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| CN107894382B (en) * | 2017-10-05 | 2020-06-30 | 西南石油大学 | High-temperature and high-pressure rock core holder |
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| CN108708716B (en) * | 2018-05-18 | 2022-08-23 | 西南石油大学 | Multifunctional three-dimensional flow simulation closing device |
| CN108916535A (en) * | 2018-08-30 | 2018-11-30 | 天津开发区天水华源机电设备技术有限公司 | A kind of flexible compound liner pipe fitting |
| CN109270246A (en) * | 2018-10-19 | 2019-01-25 | 成都理工大学 | A kind of radial more monitoring core holding units for fracture hole oil reservoir |
| CN109358079B (en) * | 2018-11-06 | 2023-10-27 | 广州海洋地质调查局 | Device and method for measuring sea area argillaceous silt reservoir structure change by combining CT technology |
| CN113624608B (en) * | 2020-05-07 | 2023-09-26 | 中国石油天然气股份有限公司 | Reservoir rock fracture pressure testing device and method |
| CN114252378A (en) * | 2020-09-24 | 2022-03-29 | 青岛石大华通科技有限公司 | High-temperature and high-pressure clamp holder and using method thereof |
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| CN105973919A (en) | 2016-09-28 |
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