CN208187991U - Hydrate generates laws for plugging Visual evaluation system in sieve - Google Patents

Abstract

The utility model proposes hydrates in a kind of sieve to generate laws for plugging Visual evaluation system, it include: reaction kettle, gas-liquid delivery coil pipe, high-speed camera, and digital sampling and processing, the reaction kettle is mounted in cryostat on runing rest, including sapphire autoclave body, screen assemblies and the outlet end cap and inlet cap at autoclave body both ends are mounted in autoclave body, the high-speed camera is mounted on the position of face reaction kettle inside cryostat, to capture video data in sapphire autoclave body, the digital sampling and processing is to acquire circulating pump pump speed data, gas liquid ratio, system temperature, pressure and high-speed camera video data are simultaneously handled.This system can add skin factor calculating for (vertical well, horizontal well or multiple-limb hole) shaft bottom sieve control sand under the conditions of exploitation of gas hydrates well difference casing programme and the formulation of accurate decompression temperature control scheme provides basic data, provide strong support for the sand management system of exploitation of gas hydrates well.

Description

Hydrate generates laws for plugging Visual evaluation system in sieve

Technical field

The utility model belongs to exploitation of gas hydrates field, is related to shaft bottom mechanical picker in the hydrate recovery process of ocean Tubing filter medium clogging causes hydrate well capacity to decline degree evaluation technique direction, and in particular to sieves under a kind of practical mining conditions The secondary evaluation system for generating laws for plugging of hydrate in pipe network piece.

Background technique

The a large amount of natural gas hydrate resources of China surrounding sea areas preservation, success exploitation of gas hydrate resource will help In improvement China's energy resource structure.China in 2017 has carried out in the shale flour sand type reservoir of South Sea Shenhu sea area schedules to last 60d's Gas Hydrate In Sea Areas pilot production for the first time obtains the tired gas production of 30.9 ten thousand sides, obtains and produces gas duration and tired gas production two Item physical record makes China maintain the leading position in natural gas hydrate resources exploitation international competition.

With pilot production it is continuous development and deepen continuously to pilot production phenomenon understanding, it is found by the applicant that some do not examine originally The engineeriing geological phenomenon considered already causes very big puzzlement to the industrialization process of gas hydrates.Such as control sand medium Performance analysis, secondary generation of hydrate etc. in stratum and pipeline.Applicant further studies discovery: natural gas hydration The increase that sand sieve pipe adds skin factor, not only blocking due to shale particle are controlled in object recovery process, it is often more important that Under the conditions of a constant pressure drop, producing gas production water and bottom hole temperature (BHT), the especially secondary generation of screen surface hydrate of sand sieve pipe surface is controlled The raising of caused parasitic pressure drop.

The conventional evaluation method for causing production capacity to influence about control sand medium, the main blocking for considering shale particle, this method It has been unable to satisfy the demand of exploitation of gas hydrates well risk assessment completely；Screen casing blocks risk, blocks up in hydrate recovery well Feeler gauge rule and its on folding of both the evaluation that production capacity influences must comprehensively consider shale blocking and hydrate secondary generations blocking Add effect.Wherein the former can use for reference the evaluation method that shale blocks in conventional gas and oil, but the latter is exploitation of gas hydrates The exclusive new problem of well is both at home and abroad at present blank to this research.Therefore, the purpose of this utility model is exactly to propose one kind Hydrate generates laws for plugging Visual evaluation device and method in sieve, to solve current exploitation of gas hydrates well shaft bottom Screen casing evaluates faced bottleneck.

Utility model content

The utility model is unable to satisfy day for the evaluation method for causing production capacity to influence about control sand medium conventional at present The demand of right gas hydrate recovery well risk assessment provides one kind and visually, for real-time observes control sand sieve pipe sieve mesh sheet The experimental provision and method of the secondary generation of two sides hydrate, enrichment and laws for plugging, thus not for exploitation of gas hydrates well Skin factor calculating and precisely drop are added with (vertical well, horizontal well or multiple-limb hole) shaft bottom sieve control sand under the conditions of casing programme The formulation of voltage-controlled temperature scheme provides basic data, provides strong branch for the sand management system of exploitation of gas hydrates well Support.

The utility model, which is that the following technical solution is employed, to be realized:

The utility model proposes hydrates in a kind of sieve to generate laws for plugging Visual evaluation system, comprising: reaction kettle, It is mounted in cryostat on runing rest, including sapphire autoclave body, in autoclave body screen assemblies and is mounted on autoclave body two The outlet end cap and inlet cap at end, two end cap outside are all connected with high-pressure metal pipe；Gas-liquid delivery coil pipe, arrival end is by following Ring pump is connected to reaction kettle outlet end cap, and middle part connects water supply pump and methane gas cylinder, and outlet end connects vacuum pump and reaction kettle Inlet cap, gas-liquid delivery coil pipe are mounted in closed low temperature water bath, and high-speed camera is mounted on inside cryostat just To the position of reaction kettle, capturing video data in sapphire autoclave body, obtain in sieve that hydrate is secondary to generate blocking When sieve around flow pattern situation of change；Digital sampling and processing, to acquire circulating pump pump speed data, gas liquid ratio, System temperature, pressure and high-speed camera video data are simultaneously handled.

Further, the screen assemblies include sieve mesh sheet, sieve mesh sheet bracket, and the sieve mesh sheet is real well bottom Sieve used in screen casing, sieve mesh sheet are mounted on sieve mesh sheet bracket, are in long tubular, whole horizontal, the sieve mesh sheet branch Frame includes circular screen mesh bracket bottom plate, screen frame connector and the 6-10 rib positioned at same cylindrical surface, the rib one End is fixed on circular screen mesh bracket bottom plate, and another section is fixed on screen frame connector, the diameter of the screen frame bottom plate The diameter of equivalent outlet end cap outside high pressure metal tube.

Further, the inside connection loudspeaker of the reaction kettle inlet cap enter head piece, and it includes loudspeaker outer lining that this, which enters head piece, With loudspeaker liner, between using sealing bearing connection, bearing outer rim and outer lining inner edge are interference fitted, and bearing inner edge is fixed with connection Cock, the connection cock are a conical surface bloom, and connection cock and loudspeaker liner top are welded, and are equipped with spiral inside connection cock The runner of distribution, runner exit is in connection cock side wall, and entrance is above connection cock.

Further, the loudspeaker liner lower edge outer diameter is identical as the diameter of screen frame bottom plate, the inlet cap and Pressure tap is had on high-pressure metal pipe outside outlet end cap, connects difference gauge, the pressure tap on inlet cap between the two It being deep into the middle part of reaction kettle by pressure guiding pipe, gas-liquid delivery coil outlets end connects vacuum pump by three-dimensional conversion valve, In addition, further including water-bath refrigerating cabinet to the closed low temperature water bath cooling.

Further, sapphire autoclave body the internal diameter 30mm, length 150mm；The sieve netting length is 100mm, screen frame bottom plate diameter are 20mm；The gas-liquid delivery coil pipe is 30m in the effective length closed in low temperature water bath.

Compared with prior art, it the advantages of the utility model and has the active effect that

The utility model can in visual observation screen media under different temperature and pressure-flow operating modes gas hydrates life At, enrichment condition, and the secondary generation of hydrate can be established by carrying out simulating lab test to cause shaft bottom to control sand medium additional The computation model of skin factor response pattern, for exploitation of gas hydrates well control sand medium production capacity affecting laws evaluation provide according to According to for prevent the secondary exploitation of gas hydrates well shaft bottom for being generated as one of optimization aim of hydrate in screen casing to be depressured scheme Formulation help is provided.

The utility model passes through the multi-layer structure design and sieve mesh sheet bracket bottom plate of sieve mesh sheet and reaction kettle outlet end Equal diameter design between the high-pressure metal pipe covered, makes the reaction kettle measured in experimentation entrance-outlet pressure Difference can be approximately considered be actual measurement sieve mesh sheet two sides pressure difference, effectively prevent sapphire autoclave body surface drilling survey pressure Difficult point.

The utility model loudspeaker enter the structure design of head piece, on the one hand avoid the gas-liquid two-phase fluid flowed into sieve mesh sheet The direct impact of bracket, the sealing between effective protection reaction kettle and sieve mesh sheet bracket, another reverse side more importantly promote gas Liquid two-phase flows into inside sieve perpendicular to sieve mesh sheet, forms simulation radial flow, simulates true shaft bottom mobility status as far as possible.

Detailed description of the invention

Fig. 1 is that hydrate generates the signal of laws for plugging Visual evaluation device in sieve described in the utility model embodiment Figure；

Fig. 2 is sieve Hydrate Plugging simulation reaction kettle schematic diagram described in the utility model embodiment；

Fig. 3 is screen assemblies structural schematic diagram described in the utility model embodiment；

Fig. 4 is screen assemblies lateral structure schematic diagram described in the utility model embodiment；

Fig. 5 is that loudspeaker described in the utility model embodiment become a mandarin mouth structure schematic diagram；

Fig. 6 is that loudspeaker described in the utility model embodiment enter head piece overlooking structure diagram；

Fig. 7 is connection tap structure schematic diagram described in the utility model embodiment；

Hydrate generates laws for plugging analogy method flow chart in sieve described in Fig. 8 the utility model embodiment.

In above each figure: 1, sieve Hydrate Plugging simulation reaction kettle；2, cryostat；3, vacuum pump；4, closed low Warm water bath cabinet；5, gas-liquid delivery coil pipe；6, methane gas cylinder；7, water-bath refrigerating cabinet；8, water supply pump；9, circulating pump；10, high-speed camera Machine；11, data acquisition module；12, reaction kettle inlet cap；13, sapphire autoclave body；14, jointing clip；15, reaction kettle exports End cap；16, high-pressure metal pipe；17, high-pressure hose；18, runing rest；19, loudspeaker enter head piece；20, sieve mesh sheet；21, it seals Cushion rubber；22, sieve mesh sheet bracket rib；23, screen frame bottom plate；24, screen frame connector；25, cock is connected；26, impulse Pipe；19-1, loudspeaker enter head piece connection screw thread；19-2, loudspeaker outer lining；19-3, loudspeaker liner；19-3-1, loudspeaker liner water conservancy diversion stream Road；19-3-2, loudspeaker liner lower edge；19-3-3-loudspeaker liner upper bearing；20-1, connection cock inner flow passage；25-1, company Connect cock inner flow passage；F1, F2, F3, F4, high-pressure ball valve；FC1, three-dimensional convert ball valve；T1, temperature point；P1, P2, pressure are surveyed Point.

Specific embodiment

In order to which the above objects, features, and advantages of the utility model are more clearly understood, with reference to the accompanying drawing and Embodiment is described further the utility model.

Embodiment one, the present embodiment propose that hydrate generates laws for plugging Visual evaluation system, reference in a kind of sieve Fig. 1, including reaction kettle 1, vacuum pump 3, gas-liquid delivery coil pipe 5, methane gas cylinder 6, water supply pump 8, circulating pump 9, water-bath refrigerating cabinet 7, High-speed camera 10 and data acquisition module 11.

With reference to Fig. 2 and Fig. 3, reaction kettle includes: sapphire autoclave body 13, reaction kettle inlet cap 12, jointing clip 14, reaction Kettle outlet end cap 15, runing rest 18, loudspeaker enter head piece 19, screen assemblies, sealing rubber ring 21, sieve mesh sheet bracket and phase therewith The high-pressure metal pipe 16 and high-pressure hose 17 of connection.Sapphire autoclave body 13 and reaction kettle inlet cap 12, outlet end cap 15 use The dual-seal of end part seal cushion rubber and side wall sealing rubber ring, reaction kettle inlet cap 12 and outlet end cap 15 pass through metal pull bar Formula jointing clip 14 is connected and is fixed；High-pressure metal pipe 16 is connected with cutting ferrule pressure cap on the outside of reaction kettle inlet cap 12, inside connects It connects loudspeaker and enters head piece 19；High-pressure metal pipe 16, reaction kettle outlet end are connected by sealing rubber ring on the outside of reaction kettle outlet end cap 15 Connection and the isodiametric sieve mesh sheet bracket of high-pressure metal pipe on the inside of lid 15, one or more layers sieve is wrapped up in sieve mesh sheet bracket periphery Net mesh sheet；Entire reaction kettle is mounted on runing rest, and runing rest can adjust the angle of reaction kettle according to actual needs, make Can be carried out simulated experiment in arbitrary inclination.

The arrival end of gas-liquid delivery coil pipe 5 is sequentially connected circulating pump 9 and reaction kettle outlet end cap 15 by high-pressure hose 17 On high-pressure metal pipe 16, the middle part of gas-liquid delivery coil pipe 5 passes through high-pressure ball valve respectively and connects water supply pump 8 and methane gas cylinder 6, gas The high pressure on the inlet cap 12 of ball valve FC1 connection vacuum pump 3 and reaction kettle is converted by three-dimensional in the outlet end that liquid mixes defeated coil pipe 5 Metal tube 16, gas-liquid delivery coil pipe 5 are mounted in closed low temperature water bath 4.

As shown in Figure 1, high-speed camera 10 is mounted on the position of 2 inside face reaction kettle of cryostat, to capture Video data in sapphire autoclave body.Digital sampling and processing 11, to acquire circulating pump pump speed data, gas liquid ratio, system temperature Degree T1, pressure P1, P2 and high-speed camera video data are simultaneously handled.

The present embodiment screen assemblies are as shown in Figures 3 and 4, including sieve mesh sheet 20, which is mounted on sieve It is in long tubular on mesh sheet bracket, whole horizontal, sieve mesh sheet bracket includes circular screen mesh bracket bottom plate 23, screen frame connector 24 And 6 ribs 22 (specific item number is fixed according to actual needs) positioned at same cylindrical surface, 22 one end of rib is fixed on circular screen On net bracket bottom plate 23, another section is fixed on screen frame connector 24, and the diameter of screen frame bottom plate 23 is equal to outlet end cap The diameter of outside high pressure metal tube 16.Wherein screen frame bottom plate 23 is steel sheet, and screen frame connector 24 is and sieve branch The isodiametric steel ring of frame bottom plate 23, connect with reaction kettle outlet end cap 15.Sieve mesh sheet 20, sieve are wound on sieve mesh sheet bracket The screen casing number of plies used in the several factually border hydrate recovery wells of winding circle on sieve mesh sheet bracket of mesh sheet 20 determines.This reality A screen frame bottom plate 23 and the isometrical design of outlet end cap outside high pressure metal tube 16 are applied, so that gas-liquid mixture is in flow process In reduce variable diameter throttle effect, therefore reduce flowing when gas-liquid flows to high-pressure metal pipe from sieve mesh sheet internal stent resistance Power, while avoiding when outlet end cap protrudes into pressure guiding pipe to sieve mesh sheet internal stent caused by the flowing in narrow space not Benefit influences, therefore the pressure that can be approximately considered reaction kettle outlet end is equal to the average pressure of sieve mesh sheet internal stent, and sieves Pressure on the outside of net mesh sheet is approximately equal to the pressure inside reaction kettle inlet cap.Therefore, long tubular is installed using the principle The pressure differences of screen assemblies two sides be converted into the pressure difference at reaction kettle entrance both ends, effectively reduce and measure pressure in conventional design Error between difference and the practical true pressure difference in sieve two sides.

With reference to Fig. 5 to Fig. 7, the present embodiment loudspeaker enter head piece 19 be typical " two floors " formula structure, in shape as The loudspeaker of two placements that gather into folds.Including loudspeaker outer lining 19-2 and loudspeaker liner 19-3, loudspeaker liner lower edge 19-3-2 outer diameter with The diameter of screen frame bottom plate 23 is identical, is connected between loudspeaker outer lining 19-2 and loudspeaker liner 19-3 using sealing bearing 19-3-3 It connects, bearing outer rim and outer lining inner edge are interference fitted and fix, and bearing inner edge is fixed with cock 25 is connect, and connection cock 25 is a cone Face bloom, connects cock 25 and liner top is welded to connect, and the inner flow passage 25-1 with Spiral distribution is contained inside connection cock, Runner exit is in connection cock side wall, and entrance is right above connection cock.Lining setting Spiral distribution from top to down in loudspeaker Water conservancy diversion runner 19-3-1.After the fluid in top high-pressure metal pipe 16 enters connection cock inner flow passage 25-1, in centrifugal force Lower drive loudspeaker liner 19-9 is acted on to rotate, fluid is dumped into water conservancy diversion runner 19-3-1 after inner flow passage 25-1 outflow, Then it is thrown toward reaction kettle internal edge again.It is conical surface bearing 19-3-3 that the present embodiment, which connects bearing, with loudspeaker outer lining 19-2 mistake It is full of cooperation.During actual experiment, when gas-liquid two-phase, which flows through high-pressure metal pipe, to be entered inside reaction kettle, connection rotation is initially entered Plug 25, since connection cock 25 and loudspeaker liner 19-3 contain contrary Spiral distribution runner, high-speed gas-liquid mixing Stream will drive the inner edge bearing 19-3-3, connect cock 25 and loudspeaker liner 19-3 high speed rotation, but loudspeaker outer lining 19-2 and axis It holds outer rim then to remain static, be sufficiently mixed gas-liquid by rotation and be thrown toward outer rim inside reaction kettle, get rid of to reaction kettle The fluid-mixing of internal outer rim again radially to be in reaction kettle center sieve net product component flow when, be formed mould naturally Pseudoradial flow.Therefore, loudspeaker enter the special designing of head piece and dedicated connection structure ensure that gas-liquid be sufficiently mixed and screen casing outside Enclose the simulation of radial flow flowing.

When surveying pressure, the loudspeaker of reaction kettle arrival end enter under head piece turning effort, the pressure instability of real reaction kettle arrival end It is fixed, the true average pressure outside practical sieve mesh sheet cannot be represented.With reference to Fig. 2, the present embodiment is in inlet cap 12 and outlet Pressure tap is had on high-pressure metal pipe 16 outside end cap 15, connects difference gauge between the two, for inlet cap, increases by one A metal tube forms pressure pressure tap P2, the directly pressure of the outer middle side part of measurement sieve as pressure guiding pipe 26 to reaction kettle middle part Value, can approximately think that the value is the average value of sieve outside pressure, be 360 ° omni-directional since sieve exterior space is larger It flows into, therefore does not have to worry that pressure guiding pipe is influenced caused by Liquid Flow.But for sieve inside, since sieve itself is rolled into Internal diameter is smaller after one cylindrical drum, if adding a pressure guiding pipe, the minimum diameter of pressure guiding pipe is 3mm, so also can be right Flowing inside sieve generates disturbance.Therefore, in order to reduce disturbance to the greatest extent, the pipe other than sieve is arranged in outlet pressure tap P1 Lu Zhong is provided with pressure tap on the high-pressure metal pipe 16 outside outlet end cap 15.The present embodiment experimental system for simulating, design pressure resistance 15MPa, meets the Temperature-pressure Conditions simulation in practical gas hydrates pilot production well shaft bottom by 0 DEG C -30 DEG C of temperature control range；The indigo plant Jewel autoclave body internal diameter 30mm, length 150mm；The effective train length of sieve mesh sheet is 100mm, sieve mesh sheet bracket bottom Board diameter is 20mm；The gas-liquid delivery coil pipe is 30m in the effective length closed in low temperature water bath.

The present embodiment reaction kettle ontology uses sapphire material, hydrate can be clearly captured with high-speed camera and preferentially given birth to At position, the blocking journey of sieve entirety can also be judged with the rising situation or jump in temperature value of pressure difference and system pressure Degree is realized from part to entirety, from naked eyes quantitatively to the qualitative both sides joint assessment of data.Pass through runing rest, high pressure The cooperation of metal tube and high-pressure hose facilitates the angular adjustment of reaction kettle, can easily simulate different well type (horizontal well, Vertical well or at any angle inclined shaft) the secondary generation of hydrate in condition lower screen cloth and stopping state.In actual moving process, Data collecting module collected circulating pump pumping frequency, pump flow, circulation pump pressure, gas liquid ratio, reaction kettle inlet temperature, in sieve The video data that pressure difference, the high-speed camera in outside capture.It, can be in terms of qualitatively and quantitatively two to sieve using above-mentioned data The rule of the secondary generation of hydrate and the chocking-up degree as caused by hydrate secondary generation, block part are evaluated in net.

Embodiment two, the present embodiment propose that hydrate generates laws for plugging visual evaluating method, reference in a kind of sieve Fig. 8 includes the following steps:

(1) simulation well type is determined, install experiment flow: the well type simulated according to actual needs determines hydrate in sieve Reaction kettle inclination angle needed for blocking Simulation evaluation experiment, adjusts reaction kettle and fixation.It is sequentially connected reaction kettle, vacuum pump, gas-liquid Mix defeated coil pipe, methane gas cylinder, water supply pump, circulating pump, water-bath refrigerating cabinet and data acquisition module；

(2) vacuumize: connecting circuit process, open between gas-liquid delivery coil pipe and reaction kettle, circulating pump and reaction kettle it Between and the valve between circulating pump and gas-liquid delivery coil pipe, open vacuum pump, whole system is vacuumized；

(3) gas-liquid delivery coil pipe is pressurized: being closed between gas-liquid delivery coil pipe and reaction kettle, between circulating pump and reaction kettle Valve connects methane gas cylinder, water supply pump, injects quantitative methane gas and quantitative water into coil pipe according to the gas-water ratio of setting, And it is pressurized to setup pressure value；

(4) suck-back recycles: opening the valve between gas-liquid delivery coil pipe and reaction kettle, between circulating pump and reaction kettle, makes Air-water mixture in gas-liquid delivery coil pipe sucting reaction kettle under the action of negative pressure.It is then turned on circulating pump, pumping frequency circulation is determined, makes Flow pattern substantially constant in entire pipeline.It then proceedes to infuse methane gas, water filling into gas-liquid delivery coil pipe, make up due to reaction kettle Gas-liquid delivery coil pipe pressure reduction caused by suck-back；

(5) cooling simulation: starting acquisition synchronously with step (4), injects methane gas into gas-liquid delivery coil pipe in proportion Body and water maintain pressure in preset value.Observe the flow pattern base in pipeline from reaction kettle sapphire autoclave body in the process when step (4) When this is constant, the pressure drop of sieve mesh sheet two sides also tends towards stability.At this point, starting acquisition system, continues to determine pumping frequency circulation, circulation Acquisition high-speed camera video image, pressure difference, temperature, pressure change with time in real time in the process；Start water-bath refrigerating cabinet and Cryostat sets identical temperature value, slowly cools down to system, and observation screen surface hydrate starts facing for enrichment formation Boundary's temperature condition value；

(6) cooling mode is selected, blocking simulation: synchronously with step (4), injects first in proportion into gas-liquid delivery coil pipe Alkane gas and water maintain pressure in preset value.Start the stagnation temperature that enrichment is formed when temperature condition reaches screen surface hydrate When spending condition value, the fixed temperature of selection is continuously circulated and continues slow cooling and recycles both of which according to actual needs, observes constant temperature In degree condition lower screen cloth mesh sheet Hydrate Plugging rule change with time rule or constant temperature reduce environment lower screen cloth mesh sheet Middle hydrate is enriched with laws for plugging；

(7) preset pressure value and gas liquid ratio are adjusted, circulating analog: adjusting the preset pressure value or gas liquid ratio condition of system, Step (2)-(6) are repeated, obtaining by test of many times with temperature, pressure, gas-water ratio is respectively water in the sieve mesh sheet of reference axis Close the critical item of hydrate enrichment blocking to a certain extent in the secondary generation critical condition distributed in three dimensions plate of object and sieve mesh sheet Part distributed in three dimensions plate；

(8) stop simulation: when the pressure difference of sieve mesh sheet two sides promotes 10 times or more of high initial pressure difference, explanation Severe blockage occurs since secondary generation of the hydrate in sieve mesh sheet already leads to sieve, in practical hydrate producing well Will lead to serious production capacity reduces, and stops experiment.

It by this method, may be implemented: observing hydrate enrichment in the sieve mesh sheet for controlling sand sieve pipe under the conditions of certain well type Critical temperature value, critical pressure value and the critical air ratio occurred is blocked, is dropped for practical exploitation of gas hydrates well shaft bottom The formulation of pressure scheme provides indicating risk point；It is stifled to observe hydrate enrichment in the sieve mesh sheet for controlling sand sieve pipe under the conditions of different well type Plug degree, by comparing the chocking-up degree of different well type condition lower screen cloth mesh sheet, to the well of practical gas hydrates pilot production well The layout of type design or screen casing in shaft bottom provides suggestion；Intuitive sieve mesh sheet Hydrate Plugging indicating risk plate is formed, is supplied Live test mining project decision uses, and exploits the evaluation of production capacity affecting laws caused by the measure of well control sand for hydrate and provides support.

The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of variation is applied to other fields, but all without departing from the content of the technical scheme of the utility model, according to this reality With novel technical spirit any simple modification, equivalent variations and remodeling to the above embodiments, it is practical new to still fall within this The protection scope of type technical solution.

Claims (7)

1. hydrate generates laws for plugging Visual evaluation system in sieve characterized by comprising

Reaction kettle is mounted in cryostat on runing rest, including sapphire autoclave body, be located at autoclave body in screen assemblies and peace Outlet end cap and inlet cap mounted in autoclave body both ends, two end cap outside are all connected with high-pressure metal pipe；

Gas-liquid delivery coil pipe, arrival end are connected to reaction kettle outlet end cap, middle part connection water supply pump and first by circulating pump Alkane gas cylinder, outlet end connect the inlet cap of vacuum pump and reaction kettle, and gas-liquid delivery coil pipe is mounted on closed low temperature water bath It is interior,

High-speed camera is mounted on the position of face reaction kettle inside cryostat, to capture video in sapphire autoclave body Data；

Digital sampling and processing, to acquire circulating pump pump speed data, gas liquid ratio, system temperature, pressure and high-speed camera Video data is simultaneously handled.

2. hydrate generates laws for plugging Visual evaluation system in sieve according to claim 1, which is characterized in that institute Stating screen assemblies includes sieve mesh sheet and sieve mesh sheet bracket, and the sieve mesh sheet is mounted on sieve mesh sheet bracket in long cylinder Shape, whole horizontal, the sieve mesh sheet bracket includes circular screen mesh bracket bottom plate, screen frame connector and is located at same cylinder The 6-10 rib in face, described rib one end are fixed on circular screen mesh bracket bottom plate, and another section is fixed on screen frame connector On, the diameter of the screen frame bottom plate is equal to the diameter of outlet end cap outside high pressure metal tube.

3. hydrate generates laws for plugging Visual evaluation system in sieve according to claim 1 or 2, feature exists In the inside of, the reaction kettle inlet cap, connection loudspeaker enter head piece, and it includes loudspeaker outer lining and loudspeaker liner that this, which enters head piece, between Using sealing bearing connection, bearing outer rim and outer lining inner edge are interference fitted, and bearing inner edge is fixed with connection cock, the connection rotation Plug is a conical surface bloom, and connection cock and liner top are welded, and the runner of Spiral distribution, runner exit are equipped with inside connection cock In connection cock side wall, entrance is above connection cock.

4. hydrate generates laws for plugging Visual evaluation system in sieve according to claim 3, which is characterized in that institute It is identical as the diameter of screen frame bottom plate to state loudspeaker liner lower edge outer diameter, the high-pressure metal outside the inlet cap and outlet end cap Pressure tap is had on pipe, connects difference gauge between the two, and the pressure tap on inlet cap is deep into reaction by pressure guiding pipe In the middle part of kettle.

5. hydrate generates laws for plugging Visual evaluation system in sieve according to claim 1, which is characterized in that also Including water-bath refrigerating cabinet to the closed low temperature water bath cooling.

6. hydrate generates laws for plugging Visual evaluation system in sieve according to claim 1, which is characterized in that institute Sapphire autoclave body the internal diameter 30mm, length 150mm stated；The sieve netting length is 100mm, and screen frame bottom plate diameter is 20mm；The gas-liquid delivery coil pipe is 30m in the effective length closed in low temperature water bath.

7. hydrate generates laws for plugging Visual evaluation system in sieve according to claim 1, which is characterized in that institute It states gas-liquid delivery coil outlets end and vacuum pump is connected by three-dimensional conversion valve.