CN206563722U - A kind of core holding unit for CT scan - Google Patents

Abstract

The utility model proposes a kind of core holding unit for CT scan, it is related to oil-gas field development technical field, the core holding unit includes the rubber bush for being arranged and be up/down perforation cylindrical body successively from inside to outside, carbon fiber cylinder and electric heating cover, the confined pressure chamber of annular is formed between rubber bush and carbon fiber cylinder, confined pressure intracavitary is provided with thermocouple, thermocouple and electric heating cover are electrically connected with temperature controller, the end sealing of carbon fiber cylinder is connected with plug, carbon fiber cylinder bottom end seal is connected with base, plug, the internal face of base and rubber bush encloses the holding chamber to be formed and accommodate rock core, provided with the liquid outflow port connected with holding chamber in plug, the liquid hand-hole connected with holding chamber and the confined pressure liquid hand-hole connected with confined pressure chamber are provided with base, the core holding unit disclosure satisfy that the scanning stablized under high-temperature and high-pressure conditions to rock core.

Description

A kind of core holding unit for CT scan

Technical field

The utility model is related to oil-gas field development technical field, more particularly to for studying microscopic remaining oil under pore scale A kind of core holding unit for CT scan of DYNAMIC DISTRIBUTION sign and changing rule.

Background technology

Being distributed in oil field development for remaining oil is a highly difficult job in accurate description stratum.Have a clear understanding of stratum The dynamic migration characteristics of pore structure, particle properties, fluid distrbution and two-phase fluid, are the substantially square of remaining oil research technology Method, while being also the basis for improving recovery ratio.In recent years, CT scan technology is widely used in oil-gas field development neck both at home and abroad Domain.CT scan technology can carry out multiple dimensioned structural characterization to rock core, while damage will not be caused to rock interior structure, should Technology finally turns into the accurate pore structure and its three-dimensional information image of fluid distrbution of obtaining in the application in petroleum works field May, characterize and become especially for microscopic remaining oil DYNAMIC DISTRIBUTION (is accurate to below Nano grade) under research pore scale Law becomes a kind of possible.By the extraction and the separation of each phase fluid of pore structure, porous Jie can be accurately calculated The characteristic parameters such as porosity, permeability, each phase fluid volume and the surface area of matter, the research for remaining oil behavioral characteristics provides pole Big convenience.The CT scan method being commonly used at this stage, most of is to exposed rock under conditions of no rock core fastener Core carries out CT scan, it is impossible to consider the formation conditions such as HTHP, the accuracy of recognition result is still to be tested.

But, it is technical that existing conventional rock core holder can not be directly applied to CT scan.First, conventional core is pressed from both sides Holder material, which can not be met, makes the undamped requirement penetrated of X-ray, it is impossible to rock core scanning imagery；Secondly, conventional core folder It is not small enough that the diameter of holder is done, and causes point valve rate of CT scan very low, it is impossible to clearly recognizes that the attached of remaining oil deposits shape in pore throat State, it is impossible to study the changing rule of remaining oil；Again, existing core holding unit non-refractory, it is impossible to realize in height Stable scanning under warm condition of high voltage, can not realize and temperature, pressure in clamper is automatically controlled.

In consideration of it, the present inventor develops one kind according to the production design experiences for being engaged in this area and association area for many years For the core holding unit of CT scan, to solve the problem of prior art is present.

Utility model content

The purpose of this utility model is to provide a kind of core holding unit for CT scan, disclosure satisfy that in HTHP bar Displacement test and the CT scan stablized to rock core are carried out under part.

To reach above-mentioned purpose, the utility model proposes a kind of core holding unit for CT scan, wherein, the rock core Clamper include be arranged successively from inside to outside and be the rubber bush of up/down perforation cylindrical body, carbon fiber cylinder and electric heating cover, The confined pressure chamber of annular is formed between the rubber bush and carbon fiber cylinder, the confined pressure intracavitary is provided with thermocouple, described Thermocouple and the electric heating cover are electrically connected with temperature controller, and the end sealing of the carbon fiber cylinder is connected with plug, institute State carbon fiber cylinder bottom end seal and be connected with base, the internal face of the plug, the base and the rubber bush encloses to be formed Accommodate the holding chamber of rock core, provided with liquid outflow port connect with the holding chamber in the plug, in the base provided with The liquid hand-hole of the holding chamber connection and the confined pressure liquid hand-hole connected with the confined pressure chamber.

It is as described above to be used for the core holding unit of CT scan, wherein, the top of the carbon fiber cylinder protrudes from the rubber Rubber sleeve simultaneously forms top connection, and the plug is in the form of a column and is inserted into from top to bottom in the top connection, outside the plug Wall and the internal face sealing of the top connection coordinate, and the bottom of the plug, which is stretched into, forms protuberance in the rubber bush, The liquid outflow port runs through the plug from top to bottom.

It is as described above to be used for the core holding unit of CT scan, wherein, have at least one on the inwall of the top connection Along the circumferentially disposed projection of the top connection, the outer wall of the plug is provided with the groove with the raised corresponding matching, institute State projection to be fastened in the groove, the plug includes the first plug body for sequentially setting and be tightly connected from top to bottom and the Two plug bodies, the groove is arranged on the outer wall of the first plug body, and the bottom of the second plug body forms described convex Go out portion, be all provided between the second plug body and the carbon fiber cylinder, between the second plug body and the first plug body There is sealing ring.

It is as described above to be used for the core holding unit of CT scan, wherein, the bottom of the carbon fiber cylinder protrudes from the rubber Rubber sleeve simultaneously forms lower contact, and the base includes upper bed-plate and lower bottom base, and the upper bed-plate has the installation cavity of up/down perforation, The lower contact is set in the installation cavity and is brought into close contact with the upper bed-plate, and the lower bottom base includes order from top to bottom The closure part of setting and fixed part, the closure part are in the form of a column and are plugged in the lower contact, and the top of the closure part is stretched Enter in the rubber bush, the inner wall sealing of the outer wall of the closure part and the lower contact coordinates, the closure part and described Sealing ring is provided between lower contact, the fixed part is expanding relative to the closure part, the fixed part and the upper bed-plate energy Releasably connect.

It is as described above to be used for the core holding unit of CT scan, wherein, the liquid hand-hole and confined pressure liquid injection Kong Jun is opened in the lower bottom base, the one end open of the liquid hand-hole in the closure part top surface and with the clamping Chamber is connected, and the other end of the liquid hand-hole is opened on the side wall of the fixed part, the one of the confined pressure liquid hand-hole End opening in the closure part side wall and be connected with the confined pressure chamber, the other end of the confined pressure liquid hand-hole is opened on The side wall of the fixed part.

It is as described above to be used for the core holding unit of CT scan, wherein, the liquid outflow port, the liquid hand-hole and The confined pressure liquid hand-hole is removedly connected with polyether-ether-ketone resin pipeline by valve member, and the liquid outflow port is remote One end, the liquid hand-hole one end and the confined pressure liquid hand-hole away from the holding chamber from the holding chamber is away from institute The one end for stating confined pressure chamber is equipped with installation cavity, is corresponded in each installation cavity and is fitted with the valve member.

It is as described above to be used for the core holding unit of CT scan, wherein, the valve member includes：

Valve joint, is plugged in the installation cavity and is connected with the inner thread of the installation cavity, the Valve joint Dorsad one end of the installation cavity is installation end, and it is connection end, the company that the Valve joint, which inserts one end of the installation cavity, Go side is in coniform, and the installation cavity has Connectivity Section, and the internal face of the Connectivity Section is and the interconnecting part corresponding matching Circular conical surface, the interconnecting part contact is provided with fluid course on the circular conical surface in the Valve joint, the fluid course One end open is opened on the Valve joint in the end face formation installing port of the installation end, the other end of the fluid course Side wall formation connected entrance, is connected by the mobile control connected entrance of the Valve joint in the installation cavity with described The connection of section and cut-off；

Cutting ferrule pressure cap, is inserted in the installing port and is connected with the inner wall sealing of the fluid course, the polyethers ether Ketone resin pipeline is through the cutting ferrule pressure cap and extends in the fluid course.

It is as described above to be used for the core holding unit of CT scan, wherein, the lower contact includes order from top to bottom and set Diameter portion and bulge, the diameter portion is cylindrical in shape, and the bulge is in hollow frustum, and the bulge is clamped in institute State between upper bed-plate and the closure part, the sidewall thickness of the bulge is more than the sidewall thickness in the diameter portion.

It is as described above to be used for the core holding unit of CT scan, wherein, wire guide can be also provided with the lower bottom base, it is described The one end open of wire guide is connected on the side wall of the closure part and with the confined pressure chamber, and the other end of the wire guide is opened Mouth is on the bottom surface of the lower bottom base, being equipped with wire in the wire guide, the thermocouple passes through the wire and the temperature Controller electrical connection is spent, the lower surface of the lower bottom base is further opened with wire casing, and one end of the wire casing is connected with the wire guide Logical, another end opening of the wire casing is on the side wall of the lower bottom base, and the wire is embedded in the wire casing, it is described under The lower surface of base is additionally provided with multiple fixing grooves, the fixing groove and the raised corresponding matching on CT scanner rotating disk sample stage, Multiple fixing grooves are uniform along the circumference of the lower surface.

It is as described above to be used for the core holding unit of CT scan, wherein, terminal is additionally provided with the wire guide, it is described Terminal includes metallic gasket, gasket seal and the hollow bolt that from top to bottom order is set, the metallic gasket, described close Gasket and the hollow bolt are respectively provided with the centre bore for allowing that the wire is passed through, the hollow bolt and the wire guide Inner thread is connected.

It is as described above to be used for the core holding unit of CT scan, wherein, the bottom surface of the lower contact offers screwed hole, institute The lower surface of lower bottom base is stated provided with the mounting screw with the screwed hole corresponding matching, the mounting screw runs through the fixed part And be threaded in the screwed hole.

It is as described above to be used for the core holding unit of CT scan, wherein, at least one piece is additionally provided with the holding chamber and is used to The rock core plug of the rock core is clamped, the rock core plug is arranged on the upper end or lower end of the rock core, and the rock core plug is in the form of a column, institute The length for stating rock core plug is 1mm~20mm, and the diameter of the rock core plug is identical with the diameter of the rock core, the carbon fiber cylinder Length is 100mm~300mm, and the external diameter of the carbon fiber cylinder is 8mm~15mm, and the carbon fiber cylinder includes multiple tubular Canister unit, multiple canister unit orders are tightly connected, and the external diameter of the thermocouple is less than 1mm, the electric heating cover Sidewall thickness is less than 1mm.

Compared with prior art, the utility model has the characteristics that and advantage：

The utility model proposes the core holding unit for CT scan can simulated formation high-temperature and high-pressure conditions driven , can be under microstate, particularly under pore scale, the dynamic of remaining oil be divided by the analysis of CT scan result for experiment Cloth is characterized and changing rule is studied.Simultaneously as the utility model proposes the energy of core holding unit 100 for CT scan Enough progress HTHP displacements in situ on CT scanner objective table rotating disk, it is ensured that CT scanner is to same in whole scanning process The alignment precision of one position.

Brief description of the drawings

Accompanying drawing described here is only used for task of explanation, and is not intended in any way limit disclosed in the utility model Scope.In addition, shape and proportional sizes of each part in figure etc. are only schematical, it is used to help to reason of the present utility model Solution, is not the specific shape and proportional sizes for limiting each part of the utility model.Those skilled in the art is new in this practicality Under the teaching of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.

Fig. 1 be the utility model proposes the core holding unit for CT scan structural representation；

Fig. 2 is the structural representation of plug in the utility model；

Fig. 3 is the structural representation of valve member in the utility model；

Fig. 4 is the structural representation of rubber bush in the utility model；

Fig. 5 is the partial enlarged drawing at A in Fig. 4；

Fig. 6 is the structural representation of base in the utility model；

Fig. 7 is the top view of base in the utility model.

Description of reference numerals：

100 core holding units；110 rubber tubes；

120 carbon fibers cylinder；121 top connections 121；

1211 is raised；122 lower contacts；

1221 diameter portions；1222 bulges；

1223 installation bolts；130 electric heating covers；

140 confined pressure chambers；150 thermocouples；

151 wires；152 terminals；

1521 metallic gaskets；1522 gasket seals；

1523 hollow bolts；160 plugs；

161 liquid outflow ports；162 protuberances；

163 grooves；164 first plug bodies；

165 second plug bodies；166 sealing rings；

170 bases；171 liquid hand-holes；

172 confined pressure liquid hand-holes；173 upper bed-plates；

174 lower bottom bases；1741 closure parts；

1742 fixed parts；1743 wire guides；

1744 wire casings；1745 fixing grooves；

175 sealing rings；180 holding chambers；

181 rock core plugs；190 valve members；

191 Valve joints；1911 installation ends；

1912 connection ends；1913 fluid courses；

1914 installing ports；1915 connected entrances；

192 cutting ferrule pressure caps；193 installation cavitys；

1931 Connectivity Sections；201 PEEK pipelines；

202 PEEK pipelines；203 PEEK pipelines；

300 rock cores.

Embodiment

With reference to the description of accompanying drawing and the utility model embodiment, can clearly it understand of the present utility model Details.But, embodiment of the present utility model described here is only used for explaining the purpose of this utility model, without It can be understood as being to limitation of the present utility model in any way.Under teaching of the present utility model, technical staff is contemplated that Based on any possible deformation of the present utility model, these are regarded as belonging to scope of the present utility model.

Refer to Fig. 1, Fig. 4 and Fig. 5, Fig. 1 be the utility model proposes the core holding unit for CT scan structure Schematic diagram；Fig. 4 is the structural representation of rubber bush in the utility model, and Fig. 5 is the partial enlarged drawing at A in Fig. 4.Such as Fig. 1 It is shown, the utility model proposes the core holding unit 100 for CT scan include being arranged successively from inside to outside and be above and below Rubber bush 110, carbon fiber cylinder 120 and the electric heating cover 130 of insertion cylindrical body, as shown in figure 3, rubber bush 110 and carbon are fine It is formed between dimension cylinder 120 in the confined pressure chamber 140 of annular, confined pressure chamber 140 and is provided with thermocouple 150, thermocouple 150 and electric heating cover 130 electrically connect with temperature controller (not shown), and the end sealing of carbon fiber cylinder 120 is connected with plug 160, carbon fiber 120 bottom end seals of cylinder are connected with base 170, as shown in figure 3, the internal face of plug 160, base 170 and rubber bush 110 is enclosed Formed in the holding chamber 180 for accommodating rock core 300 to be measured, plug 160 provided with the liquid outflow port 161 connected with holding chamber 180, bottom The liquid hand-hole 171 connected with holding chamber 180 and the confined pressure liquid hand-hole 172 connected with confined pressure chamber 140 are provided with seat 170.

In the utility model, it is set in the electric heating cover 130 in the outside of carbon fiber cylinder 120 and is arranged in confined pressure chamber 140 Thermocouple is electrically connected with temperature controller, can realize and temperature is automatically controlled, and the hot environment of simulated formation；Plug 160 and base 170 respectively with carbon fiber cylinder 120 two ends be tightly connected, it is ensured that carbon fiber cylinder 120 in be capable of simulated formation Hyperbaric environment；The material of carbon fiber cylinder 120 is carbon fiber resin composite material, and carbon fiber resin composite material is organic fiber warp Microcrystalline graphite material obtained from carbonization and graphitization processing, is a kind of material of excellent in mechanical performance, can bear high temperature high Pressure so that carbon fiber 120 lightweight, small volumes of cylinder, meanwhile, carbon fibre material is extremely low to the absorptivity of X-ray, both ensure that X Ray can penetrate its side wall, meet the requirement of X-ray scanning, can guarantee that side wall will not become with experimental pressure again Shape.Therefore, the utility model proposes the core holding unit 100 for CT scan in can simulated formation high-temperature and high-pressure conditions enter Row displacement test, by the analysis to CT scan result, can characterize to the DYNAMIC DISTRIBUTION of microscopic remaining oil and changing rule enters Row research.

In the utility model, carbon fiber resin composite material can be commercially available material, such as polysulfones, and it is slightly amber Color amorphous, transparent or translucent polymer, excellent in mechanical performance, big, the wear-resisting, high temperature resistant of rigidity.The material of rubber bush 110 Fluorubber can be selected, its absorptivity to X-ray is extremely low and high temperature resistant, corrosion-resistant.The specific profile chi of core holding unit 100 It is very little to be designed according to the size of X-ray scanning equipment, to meet X-ray scanning requirement, wherein, fluorubber is also known material Material.

In one optional example of the utility model, as shown in Figure 1 and Figure 2, the top of carbon fiber cylinder 120 protrudes from rubber Rubber sleeve 110 simultaneously forms top connection 121, and plug 160 is in the form of a column and is inserted into from top to bottom in top connection 121, plug 160 Outside wall surface and the internal face sealing of top connection 121 coordinate, and the bottom of plug 160 has the protuberance stretched into rubber bush 110 162, liquid outflow port 161 runs through plug 160 from top to bottom.So, the liquid in injection holding chamber 180 can be directly through liquid Body tap hole 161 flows out to the outside of core holding unit 100, without entering in confined pressure chamber 140, reduces the internal pressure of confined pressure chamber 140 Interfering with each other between pressure in power and holding chamber 180.

In one optional example of the utility model, as shown in Figure 1 and Figure 2, have at least on the inwall of top connection 121 One circumferentially disposed projection 1211 along top connection 121, the outer wall of plug 160 is provided with recessed with raised 1211 corresponding matching Groove 163, projection 1211 is fastened in groove 163.By the engaging between projection 1211 and groove 163, top connection 121 is added The bonding strength between plug 160, as shown in figure 1, can be provided with as needed between top connection 121 and plug 1620 many Bar projection 1211 and a plurality of groove 163.

In one optional example of the utility model, as shown in Figure 1 and Figure 2, plug 160 includes sequentially setting from top to bottom The the first plug body 164 and the second plug body 165 put and be tightly connected, groove 163 are arranged on the outer wall of the first plug body 164 On, the bottom of the second plug body 165 forms protuberance 162, between the second plug body 165 and carbon fiber cylinder 120, the second plug body 165 and first are equipped with sealing ring 166 between plug body 164.First plug body 164 is carbon fiber plug body, the first plug body 164 materials selected are consistent with the material of carbon fiber cylinder 120, further ensure the company between plug 160 and carbon fiber cylinder 120 Intensity is connect, and to the compression strength of carbon fiber 120 internal high pressures of cylinder；Second plug body 165 is Hastelloy plug body, i.e., second The material of plug body 165 is Hastelloy, and Hastelloy is known materials, is one kind of nickel-base alloy, with good anti-corruption Corrosion, can effectively prevent the acid corrosion of the liquid for displacement test.

In one optional example of the utility model, as shown in Fig. 1, Fig. 6, the bottom of carbon fiber cylinder 120 protrudes from rubber Rubber sleeve 110 simultaneously forms lower contact 122, and base 170 includes upper bed-plate 173 and lower bottom base 174, and upper bed-plate 173 has to be passed through up and down Logical installation cavity, lower contact 122 is set in installation cavity and is brought into close contact with upper bed-plate 173, and lower bottom base 174 is included from top to bottom Closure part 1741 and fixed part 1742 that order is set, closure part 1741 is in the form of a column and is plugged in lower contact 122, closure part 1741 top is stretched into rubber bush 110, and the outer wall of closure part 1741 coordinates with the inner wall sealing of lower contact 122, fixed part 1742 is expanding relative to closure part 1741, and fixed part 1742 is removedly connected with upper bed-plate 173, so, and lower contact 122 is pressed from both sides Tightly between upper bed-plate 173 and lower bottom base 174, realize and removedly connected between lower contact 122 and base 170.Wherein, on Base 173 and lower bottom base 174 are Hastelloy material, can effectively prevent the acid corrosion for liquid for displacement test room. Upper bed-plate 173 and lower bottom base 174 can removedly be connected by installation bolt.

In one optional example of the utility model, as shown in Fig. 1, Fig. 6, liquid hand-hole 171 and the injection of confined pressure liquid Hole 172 is opened in lower bottom base 174, and the one end open of liquid hand-hole 171 is in the side wall of fixed part 1742, liquid injection The other end in hole 171 is opened on the top surface of closure part 1741 and is connected with holding chamber 180, one end of confined pressure liquid hand-hole 172 Be opened on the side wall of fixed part 1742, the other end of confined pressure liquid hand-hole 172 be opened on the side wall of closure part 1741 and with Confined pressure chamber 140 is connected.So, the confined pressure liquid injected by confined pressure liquid hand-hole 172 can be directly entered confined pressure chamber 140 without Into holding chamber 180, the liquid for displacement test injected by liquid hand-hole 171 can be directly entered holding chamber 180 and Confined pressure chamber 140 will not be entered, it is ensured that in confined pressure chamber 140 in pressure and holding chamber 180 pressure controllability.Simultaneously as with It can be flowed directly out again from liquid outflow port 161 without entering into holding chamber 180 by liquid hand-hole 171 in the liquid of displacement Enter confined pressure chamber 140, so when carrying out displacement test, in the presence of the internal pressure of holding chamber 180, rubber bush 110 can be produced The expansion of raw radial direction, compression confined pressure chamber 140, the thermocouple 150 being at this moment arranged in confined pressure chamber 140 will be close to rubber bush On 110 side wall, the temperature of rock core 300 to be measured in rubber bush 110 can be accurately measured by further ensuring thermocouple 150 Degree.

In one optional example of the utility model, as shown in Figure 1, Figure 2 with shown in Fig. 6, liquid outflow port 161, liquid are noted Enter hole 171 and confined pressure liquid hand-hole 172 is removedly connected with polyether-ether-ketone resin pipeline by valve member 190 respectively (PEEK pipelines), the one end of liquid outflow port 161 away from holding chamber 180, the one end of liquid hand-hole 171 away from holding chamber 180 It is equipped with the one end of confined pressure liquid hand-hole 172 away from confined pressure chamber 140 in installation cavity 193, each installation cavity 193 and corresponds to inserting There is valve member 190.Specifically, liquid hand-hole 171 is connected by a valve member 190 with PEEK pipelines 201, confined pressure liquid Hand-hole 172 is connected by another valve member 190 with PEEK pipelines 202, and liquid outflow port 161 passes through another valve member 190 are connected with PEEK pipelines 203.PEEK pipelines (polyether-ether-ketone resin pipeline) being capable of high temperature resistant, resistant to chemical etching and machinery Excellent performance, disclosure satisfy that the requirement of HTHP displacement.Certainly, polyether-ether-ketone resin is also known materials.

In one optional example of the utility model, as shown in Figure 1, Figure 2 and Figure 3, valve member 190 connects including valve First 191 and cutting ferrule pressure cap 192, Valve joint 191 is plugged in installation cavity 193, and the side wall of Valve joint 191 is provided with external screw thread Be threadedly coupled between the internal thread on the inwall of installation cavity 193, Valve joint 191 dorsad installation cavity 193 one end be installation end 1911, one end of the insertion installation cavity of Valve joint 191 is connection end 1912, and connection end 1912 is in coniform, and installation cavity 193 has Connectivity Section 1931, the internal face of Connectivity Section 1931 is the circular conical surface with the corresponding matching of interconnecting part 1912, the side wall of interconnecting part 1912 Contact is provided with fluid course 1913, the one end open of fluid course 1913 is in installation end on circular conical surface in Valve joint 191 Installing port 1914 is formed on 1911 end face, the side wall that the other end of fluid course 1913 is opened on Valve joint 191 is formed Connected entrance 1915, passes through the connection of mobile control connected entrance 1915 of the Valve joint 191 in installation cavity 193 and Connectivity Section 1931 And cut-off；Cutting ferrule pressure cap 192 is inserted in installing port 1914 and is connected with the inner wall sealing of fluid course 1913, and PEEK pipelines are passed through Wear cutting ferrule pressure cap 192 and extend in fluid course 1913.When needing Connectivity Section 1931 to be connected with PEEK pipelines, valve is connect First 191 outwards screw out, and the internal face at connection end 1912 and Connectivity Section 1931 produces gap, connected entrance 1915 and the phase of Connectivity Section 1931 Connection, installation cavity 193 is in open mode；When needing Connectivity Section 1931 and PEEK pipelines 200 separate, by Valve joint 191 Inwardly tighten, the connection contact of end 1912 is on the internal face of Connectivity Section 1931, and Connectivity Section 1931 is dead by closure, connected entrance 1915 with Connectivity Section 1931 separates, and valve member 190 is closed.So very easily control liquid outflow port 161 and PEEK The connection of pipeline 203, liquid hand-hole 171 and PEEK pipelines 201 and confined pressure liquid hand-hole 172 and PEEK pipelines 202 and every It is disconnected.In addition, tightening Valve joint 191, the lower PEEK pipelines 201,202,203 of dismounting can be disconnected, it is convenient and swift, it is to avoid PEEK pipelines 201,202,203 pull the influence rotated to CT scan process turntable sample stage.

In an optional example, the external screw thread of Valve joint 191 is close to installation end 1911, and connected entrance 1915 is close to even Go side 1912, is additionally provided with sealing ring 194 between the inwall of Valve joint 191 and installation cavity 193, and sealing ring 194 is in O-shaped and set Put between the external screw thread and connected entrance 1915 of Valve joint 191, prevent the leaked liquid in PEEK pipelines and Connectivity Section 1931 To outside Valve joint 191.

In one optional example of the utility model, as shown in Fig. 1, Fig. 6, lower contact 122 includes order from top to bottom The diameter portion 1221 of setting and bulge 1222, diameter portion 1221 are cylindrical in shape, and bulge 1222 is in hollow frustum, bulge 1222 are clamped between upper bed-plate 173 and lower bottom base 174, and the sidewall thickness of bulge 1222 is more than the side thickness in diameter portion 1221 Degree.The side wall thickening of bulge 1222, further increases the bonding strength between lower contact 122 and base 170.

In one optional example of the utility model, as Figure 1 and Figure 4, between closure part 1741 and lower contact 122 Provided with sealing ring 175, further ensuring the liquid in the liquid in holding chamber 180 and confined pressure chamber 140 will not leak.

In one optional example of the utility model, as shown in figure 1, being additionally provided with wire guide 1743 in lower bottom base 174, lead The one end open of string holes 1743 is connected on the side wall of closure part 1741 and with confined pressure chamber 140, the other end of wire guide 1743 It is opened in the lower surface of lower bottom base 174, wire guide 1743 and is equipped with wire 151, thermocouple 150 passes through wire 151 and temperature Controller is electrically connected.

In one optional example of the utility model, as Figure 1 and Figure 4, terminal is additionally provided with wire guide 1743 152, terminal 152 includes metallic gasket 1521, gasket seal 1522 and the hollow bolt 1523 that from top to bottom order is set, Metallic gasket 1521, gasket seal 1522 and hollow bolt 1523 are respectively provided with the centre bore for allowing that wire 151 is passed through, hollow bolt 1523 are connected with the inner thread of wire guide 1743.Gasket seal 1522 is provided with terminal 152 can be to wire guide 1743 realize sealing, prevent the liquid in confined pressure chamber 140 from being leaked through wire guide 1743.

In one optional example of the utility model, as shown in Figure 1, Figure 7 shows, the lower surface of lower bottom base 174 is further opened with Wire casing 1744, one end of wire casing 1744 is connected with wire guide 1743, and another end opening of wire casing 1744 is in the side of lower bottom base 174 On wall, wire 151 is embedded in wire casing 1744.So, wire 151 will not protrude from the lower surface of lower bottom base 174, it is ensured that The lower surface of lower bottom base 174 can be brought into close contact with CT scanner rotating disk sample stage (not shown), it is ensured that whole core holding unit 100 can rest easily within CT scanner rotating disk sample stage.

In one optional example of the utility model, as shown in fig. 7, the bottom surface of lower contact 122 offers screwed hole, under The lower surface of base 174 is provided with the mounting screw 1223 with screwed hole corresponding matching, and mounting screw 1223 is through lower bottom base 174 Fixed part 1742 is simultaneously threaded in the screwed hole.The connection further enhanced between lower contact 122 and base 170 is strong Degree, it is ensured that base 170 will not also be separated with carbon fiber cylinder 120 and ftracture under conditions of HTHP, and then ensure real That tests is smoothed out.Mounting screw 1223 can be multiple according to being provided with the need for experiment, and multiple mounting screws 1223 connect under First 122 circumference is uniform.

In one optional example of the utility model, as shown in fig. 7, the lower surface of lower bottom base 174 be additionally provided with it is multiple solid Determine groove 1745, fixing groove 1745 and the raised (not shown) corresponding matching on CT scanner rotating disk sample stage, multiple fixations Groove 1745 is uniform along the circumference of lower surface.So, the core holding unit 100 for CT scan is placed on CT scanner rotating disk sample After on platform, the projection correspondence on CT scanner rotating disk sample stage is fastened in fixing groove 1745 so that the rock core for CT scan Clamper 100 can together stablize rotation with CT scanner rotating disk sample stage, further ensure same in whole scanning process The alignment precision of position.

In one optional example of the utility model, it is used to as shown in figure 1, being additionally provided with least one piece in holding chamber 180 The rock core plug 181 of rock core 300 is clamped, rock core plug 181 is arranged on the upper end or lower end of rock core 300.In this manner it is achieved that same rock Heart clamp holder 100 carries out CT scan experiment to the rock core to be measured 300 of different length, when the rock core length being put into holding chamber 180 Less than holding chamber 180 length when, rock core plug 181 is placed on to the upper end or lower end of rock core 300, one end top of rock core plug 181 It is against on rock core 300, the other end contact of rock core plug 181 realizes the folder to the two ends of rock core 300 on plug 160 or base 170 Tightly.Certainly, according to the length of holding chamber 180 and the difference of the length of rock core 300 to be measured, and its length of rock core plug 181, Ke Yi Multiple rock core plugs 181 are set in holding chamber 180, and multiple rock core plugs 181 can be arranged on the two ends of rock core 300, can also only set Put in one end of rock core 300, can guarantee that the length of rock core 300 to be measured and the length sum of multiple core plugs 181 and holding chamber 180 Length it is identical, realize clamping to rock core 300 to be measured.By the quantity for changing rock core plug 181, it is possible to achieve using together One core holding unit 100 for being used for CT scan is clamped to the rock core to be measured of different length.

In an optional example, rock core plug 181 is in the form of a column, and the length range of rock core plug 181 is 0mm~20mm, excellent Elect 5mm as, the diameter of rock core plug 181 is identical with the diameter of rock core 300 to be measured.

In an optional example, sealing ring is provided between rock core plug 181 and rubber bush 110, reaches close with this The effect of envelope.

In one optional example of the utility model, as shown in figure 1, carbon fiber cylinder 120 length for 100mm~ 300mm, the external diameter of carbon fiber cylinder is 8mm~15mm, can be to diameter 5mm~8mm, and length is 10mm~50mm core to be measured Accommodated.In such manner, it is possible to the characteristics of more for the limitation such as CT scan distance and resolution ratio, make resolution ratio be at least up to 5 micro- Rice, Nano grade can also be reached, and then resolution oil and water zonation form can be understood according to scan image.

In a preferred example, carbon fiber 120 Design of length of cylinder are 159mm, and carbon fiber 120 outside dimensions of cylinder are 14mm, a diameter of 8mm of rock core 300 to be measured, the length of rock core 300 to be measured are 50mm.

Because carbon fiber cylinder 120 employs carbon fibre material, under so small volume, carbon fiber cylinder 120 is still With good HTHP performance, it will not deform.Meanwhile, the structure of the plug 160 proposed in the utility model and its Connected mode with the connected mode of carbon fiber cylinder 120, the structure of base 170 and its with carbon fiber cylinder 120, it is ensured that plug The bonding strength of 160 bonding strength and base 170 and carbon fiber cylinder 120 with carbon fiber cylinder 120, also causes so small Volume under, the entirety of core holding unit 100 also has good HTHP performance, will not deform and leak.

In one optional example of the utility model, carbon fiber cylinder 120 includes multiple tubular canister units, multiple Canister unit order is tightly connected.In assemble carbon fibre tube 120, it can be needed according to experiment and the length of rock core to be measured is selected The quantity of canister unit, makes the barrel lenght after assembling meet requirement of experiment.

In one optional example of the utility model, the thickness of the side wall of electric heating cover 130 is less than 1mm, and thermocouple 150 is straight Footpath is less than 1mm, to reduce its influence to x-ray imaging.

In an optional example, thermocouple 150 is the ultra-fine thermocouple that external diameter is 0.25mm, electric heating cover 130 Sidewall thickness is 0.12mm.Further reduce the influence of thermocouple 150 and electric heating cover 130 to x-ray imaging.Electric heating cover 130 can be made up of tubular electric heating film, be sleeved on certain elasticity, when using outside carbon fiber cylinder 120, and make Its outer wall for being close to carbon fiber cylinder 120 is heated.Electric heating film can use polyimides Electric radiant Heating Film, specifically, being encapsulation Polyimide film between two layers of copper foil element, is known materials.

In an optional example, its internal diameter of rubber bush 110 can be designed as 8.5mm, the length of rubber bush 110 It can be designed as 60mm.

In an optional example, base 170 exposes its height of the part of lower contact and is designed as 58mm, its diameter design For 45mm.

In an optional example, sealing ring 166, sealing ring 175 are O-shaped viton seal ring, the suction to X-ray Yield is extremely low and high temperature resistant, corrosion-resistant.

The utility model proposes the core holding unit 100 for CT scan the course of work it is as follows：

Install the utility model proposes the core holding unit 100 for CT scan, first by carbon fiber tins 120, thermoelectricity Idol 150 and the ecto-entad of rubber bush 110 order are arranged and connected；Then, core plug 181 is filled in from 120 bottoms of carbon fiber cylinder Enter the holding chamber 180 in rubber bush 110, rock core plug 181 slides to the top of rubber bush 110.Then, by rock core 300 to be tested Filled in from 120 bottoms of carbon fiber cylinder in holding chamber 180, then, another rock core plug 181 is filled in into folder from 120 bottoms of carbon fiber cylinder Hold in chamber 180 and adjacent with rock core 300 to be measured.Subsequently, by base 170 and the above-mentioned carbon fiber cylinder for installing rock core 300 to be measured 120 are connected, and being wherein put into sealing ring 175 between closure part 1741 and carbon fiber cylinder 120 is sealed, and makes leading for thermocouple 150 Line 151 draws core holding unit 100 through wire guide 1743 and wire casing 1744.Afterwards, hole 171 is injected liquid into by valve member 190 are connected with PEEK pipelines 201, and confined pressure liquid hand-hole 172 is connected by another valve member 190 with PEEK pipelines 202, and is made Two valve members 190 are in the state opened.Next, plug 160 to be arranged on to the top of carbon fiber cylinder 120, upper Sealing ring 166 is placed between the plug body 165 of joint 121 and second, between the second plug body 165 and the first plug body 164, and The first plug body 164 is set to be threadedly coupled with top connection 121；Liquid outflow port 161 and PEEK are connected by another valve member 190 Pipeline 203, specifically, first by Valve joint 191 insert in the installation cavity 193 of the first plug body 164 and with installation cavity 193 Inner thread is connected, and is then put into sealing ring 194 in the installing port 1914 of Valve joint 191, then by cutting ferrule pressure cap 192 from peace Dress mouth 1914 inserts and cutting ferrule pressure cap 192 is fixedly connected with Valve joint 191, finally by the PEEK pipelines 203 for going out liquid It is connected with cutting ferrule pressure cap 192.Finally, the core holding unit 100 for CT scan assembled is placed into CT scanner idling On disk sample stage and the projection of rotating disk sample stage that is sticked in the correspondence of fixing groove 1745 on the base of core holding unit 100 On.

After whole rock core fastener 100 and rock core to be measured 300 for CT scan is installed, perform before CT scan, Carry out displacement test.It should be noted that rock core 300 to be measured is before the carbon fiber cylinder 120 of rock core fastener 100 is loaded, Through being anticipated according to progress needed for requirement of experiment.First, make at liquid hand-hole 171, at liquid outflow port 161 and confined pressure Valve member 190 at liquid hand-hole 172 is in open mode.From PEEK pipelines 202 through confined pressure liquid hand-hole 172 to confined pressure Injection fluid is carried out in chamber 140 plus confined pressure is up to the pressure in confined pressure chamber 140 reaches 20MPa, is tightened at confined pressure liquid hand-hole 172 Valve joint 191, disconnect the lower PEEK pipelines 202 of dismounting.Thermocouple 150 and electric heating cover 130 are opened, passes through temperature control Device processed sets temperature to be 85 DEG C, and the whole rock core fastener 100 for CT scan is heated, treats temperature stabilization at 85 DEG C Afterwards, liquid (displacing fluid) progress fluid displacement reality is being injected into holding chamber 180 through liquid hand-hole 171 from PEEK pipelines 201 Test, displacing fluid flows out and is collected by liquid outflow port 161 and PEEK pipelines 203.After displacement terminates, tighten be in respectively The Valve joint 191 at Valve joint 191 and liquid outflow port 161 at liquid hand-hole 171, then be each turned off connecting and tear open Unload PEEK pipelines 201,203.In temperature stabilization after 85 DEG C, CT scan is carried out.After a CT scan terminates, carry out next During secondary displacement test, liquid hand-hole 171 and PEEK pipelines 201, the injection of confined pressure liquid need to be only connected respectively by valve member 190 Hole 172 and PEEK pipelines 202, liquid outflow port 161 and PEEK pipelines 203, then unclamp respectively above three position Valve joint 190, carries out second of displacement test.The like, rock core fastener 100 can be realized in CT scanner objective table Displacement in situ on rotating disk, it is ensured that the alignment precision of same position in whole scanning process.

When the length of rock core 300 to be measured changes, rock can be ensured by adjusting the length and quantity of rock core plug Clamping of the heart clamp holder 100 to the two ends of rock core 300 to be measured.If for example, the length of rubber bush is 60mm, the length of rock core to be measured During for 50mm, the core plug that a length is 5mm is respectively added at the two ends of rock core to be measured；If rock core length to be measured is 40mm, The two ends of rock core to be measured respectively add the core plug that a length is 10mm, or one end to place the core plug that a length is 15mm, separately Place the rock core plug that a length is 5mm in one end；When rock core to be measured is other length, combination is similar, no longer arranges one by one Go out.Preferably, it is 5mm that can make each core plug length, and further according to the length of rock core to be measured, respective numbers are added at two ends Core plug, to ensure rock core to be measured just in the centre of rubber bush, and make core plug and test specimen total length to be measured and wait In the length of holding chamber.

Multiple core holding units for CT scan can also be prepared simultaneously, and clamp each rock core for CT scan The specification and size of its holding chamber of device are differed, during experiment, and dimension is selected according to the diameter dimension of rock core 300 to be measured Core holding unit, for example, as a diameter of 5mm of rock core to be measured, from carbon fiber cylinder, the rubber with 5mm diameter matches Sleeve, plug and base install the core holding unit of connection composition and 5mm diameter matches；It is a diameter of when rock core to be measured 8mm, composition and 8mm are connected from the carbon fiber cylinder of 8mm diameter matches, rubber bush, plug and base install The core holding unit of diameter matches, certainly, the combination and the combination phase in description before of core plug and rock core to be measured Together, do not repeat herein.

For explaining in detail for the respective embodiments described above, its purpose is only that to explain to the utility model, in order to The utility model is better understood when, still, these descriptions can not be with any explanation into being to limit of the present utility model System, particularly, each feature described in various embodiments can also be mutually combined, so as to constitute other implementations Mode, except there is clearly opposite description, these features should be understood to be applied in any one embodiment, and simultaneously It is not only limited to described embodiment.

Claims (12)

1. a kind of core holding unit for CT scan, it is characterised in that the core holding unit includes covering successively from inside to outside And if being the rubber bush of up/down perforation cylindrical body, carbon fiber cylinder and electric heating cover, the rubber bush and the carbon fiber Be formed with the confined pressure chamber of annular between cylinder, the confined pressure intracavitary is provided with thermocouple, the thermocouple and the electric heating cover with Temperature controller is electrically connected, and the end sealing of the carbon fiber cylinder is connected with plug, and the carbon fiber cylinder bottom end seal is connected with Base, the internal face of the plug, the base and the rubber bush encloses the holding chamber to be formed and accommodate rock core, the plug It is interior provided with the liquid outflow port connected with the holding chamber, provided with the liquid hand-hole connected with the holding chamber in the base The confined pressure liquid hand-hole connected with the confined pressure chamber.

2. it is used for the core holding unit of CT scan as claimed in claim 1, it is characterised in that the top of the carbon fiber cylinder is convex For the rubber bush and top connection is formed, the plug is in the form of a column and is inserted into from top to bottom in the top connection, institute State the outside wall surface of plug with the internal face sealing of the top connection to coordinate, shape in the rubber bush is stretched into the bottom of the plug Into protuberance, the liquid outflow port runs through the plug from top to bottom.

3. it is used for the core holding unit of CT scan as claimed in claim 2, it is characterised in that have on the inwall of the top connection Have at least one along the top connection circumferentially disposed projection, the outer wall of the plug is provided with and the raised corresponding matching Groove, the projection is fastened in the groove, and the plug includes first for sequentially setting and being tightly connected from top to bottom Plug body and the second plug body, the groove are arranged on the outer wall of the first plug body, the bottom of the second plug body The protuberance is formed, between the second plug body and the carbon fiber cylinder, the second plug body and first plug Sealing ring is equipped between body.

4. it is used for the core holding unit of CT scan as claimed in claim 1, it is characterised in that the bottom of the carbon fiber cylinder is convex For the rubber bush and lower contact is formed, the base includes upper bed-plate and lower bottom base, the upper bed-plate has to be passed through up and down Logical installation cavity, the lower contact is set in the installation cavity and is brought into close contact with the upper bed-plate, and the lower bottom base includes Order is set from top to bottom closure part and fixed part, the closure part are in the form of a column and are plugged in the lower contact, the envelope The top in stifled portion is stretched into the rubber bush, and the outer wall of the closure part and the inner wall sealing of the lower contact coordinate, described Sealing ring is provided between closure part and the lower contact, the fixed part is expanding relative to the closure part, the fixed part with The upper bed-plate is removedly connected.

5. it is used for the core holding unit of CT scan as claimed in claim 4, it is characterised in that the liquid hand-hole and described Confined pressure liquid hand-hole is opened in the lower bottom base, the one end open of the liquid hand-hole in the closure part top surface simultaneously It is connected with the holding chamber, the other end of the liquid hand-hole is opened on the side wall of the fixed part, the confined pressure liquid The one end open of hand-hole in the closure part side wall and be connected with the confined pressure chamber, the confined pressure liquid hand-hole it is another One end open is in the side wall of the fixed part.

6. the core holding unit for CT scan as described in claim 1,2 or 5, it is characterised in that the liquid outflow port, The liquid hand-hole and the confined pressure liquid hand-hole are removedly connected with polyether-ether-ketone resin pipeline by valve member, One end away from the holding chamber of the one end of the liquid outflow port away from the holding chamber, the liquid hand-hole and described enclose The one end of hydraulic fluid hand-hole away from the confined pressure chamber is equipped with installation cavity, is corresponded in each installation cavity and is fitted with the valve Door component.

7. it is used for the core holding unit of CT scan as claimed in claim 6, it is characterised in that the valve member includes：

Valve joint, is plugged in the installation cavity and is connected with the inner thread of the installation cavity, the Valve joint is dorsad One end of the installation cavity is installation end, and it is connection end, the connection end that the Valve joint, which inserts one end of the installation cavity, In coniform, the installation cavity has Connectivity Section, and the internal face of the Connectivity Section is the circular cone with the interconnecting part corresponding matching Face, the interconnecting part contact is provided with fluid course, one end of the fluid course on the circular conical surface in the Valve joint The end face formation installing port of the installation end is opened on, the other end of the fluid course is opened on the side wall of the Valve joint Face forms connected entrance, passes through the mobile control connected entrance of the Valve joint in the installation cavity and the Connectivity Section Connection and cut-off；

Cutting ferrule pressure cap, is inserted in the installing port and is connected with the inner wall sealing of the fluid course, the polyether-ether-ketone tree Fat pipeline is through the cutting ferrule pressure cap and extends in the fluid course.

8. it is used for the core holding unit of CT scan as claimed in claim 4, it is characterised in that the lower contact is included by up to Diameter portion and bulge that lower order is set, the diameter portion are cylindrical in shape, and the bulge is in hollow frustum, the expansion Portion is clamped between the upper bed-plate and the closure part, and the sidewall thickness of the bulge is more than the side thickness in the diameter portion Degree.

9. it is used for the core holding unit of CT scan as claimed in claim 4, it is characterised in that can be also provided with the lower bottom base Wire guide, the one end open of the wire guide is connected on the side wall of the closure part and with the confined pressure chamber, the wire The other end in hole is opened on the bottom surface of the lower bottom base, and wire is equipped with the wire guide, and the thermocouple passes through described Wire is electrically connected with the temperature controller, and the lower surface of the lower bottom base is further opened with wire casing, one end of the wire casing and institute State wire guide to be connected, another end opening of the wire casing is on the side wall of the lower bottom base, and the wire is embedded described In wire casing, the lower surface of the lower bottom base is additionally provided with multiple fixing grooves, the fixing groove and CT scanner rotating disk sample stage Raised corresponding matching, multiple fixing grooves are uniform along the circumference of the lower surface.

10. it is used for the core holding unit of CT scan as claimed in claim 9, it is characterised in that be additionally provided with the wire guide Terminal, the terminal includes metallic gasket, gasket seal and the hollow bolt that from top to bottom order is set, the gold Category pad, the gasket seal and the hollow bolt are respectively provided with the centre bore for allowing that the wire is passed through, the hollow bolt It is connected with the inner thread of the wire guide.

11. it is used for the core holding unit of CT scan as claimed in claim 4, it is characterised in that open the bottom surface of the lower contact Provided with screwed hole, the lower surface of the lower bottom base is provided with the mounting screw with the screwed hole corresponding matching, the mounting screw Through the fixed part and it is threaded in the screwed hole.

12. it is used for the core holding unit of CT scan as claimed in claim 1, it is characterised in that be additionally provided with the holding chamber At least one piece rock core plug to clamp the rock core, the rock core plug is arranged on the upper end or lower end of the rock core, the rock Heart plug is in the form of a column, and the length of the rock core plug is 1mm~20mm, and the diameter of the rock core plug is identical with the diameter of the rock core, The length of the carbon fiber cylinder is 100mm~300mm, and the external diameter of the carbon fiber cylinder is 8mm~15mm, the carbon fiber cylinder bag Multiple tubular canister units are included, multiple canister unit orders are tightly connected, and the external diameter of the thermocouple is less than 1mm, The sidewall thickness of the electric heating cover is less than 1mm.