CN2564739Y - Back-pressure valve for displacement experiment - Google Patents
Back-pressure valve for displacement experiment Download PDFInfo
- Publication number
- CN2564739Y CN2564739Y CN 02276179 CN02276179U CN2564739Y CN 2564739 Y CN2564739 Y CN 2564739Y CN 02276179 CN02276179 CN 02276179 CN 02276179 U CN02276179 U CN 02276179U CN 2564739 Y CN2564739 Y CN 2564739Y
- Authority
- CN
- China
- Prior art keywords
- needle
- valve
- metallic membrane
- cavity
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model a back pressure regulating valve used for various indoor displacement experiment in petroleum gas exploitation. The valve is a cylinder, which is mainly composed of a valve body, a cavity body, metallic diaphragm, fluid flow passages, a central hole, a valve needle, etc. The utility model is characterized in that the cavity body with an air vent is arranged in the valve body; the metallic diaphragm is positioned at the lower part of the cavity body, and is sealed with the valve body and the cavity body; an intersection between a horizontal fluid flow passage and a vertical fluid flow passage is provided with a central hole upwards; the central hole extends into the cavity body, and the valve needle is arranged in the central hole; the valve needle penetrates through the metallic diaphragm; a needle tip holder of the valve needle is sealed on a sealing pad between the vertical fluid flow passage and the central hole; the top of the valve needle adopts a screw structure; the positions between the valve needle and the central hole and between the metallic diaphragm and the central hole are both sealed; a through hole is arranged between the horizontal fluid flow passage and the metallic diaphragm. The use of the valve can not cause the drop of the back pressure, and the fluctuation of the back pressure is very small. The back pressure at the outlet of the core can be kept constant effectively. Meanwhile, the utility model has low cost, easy raw material obtaining, stable performance, and strong applicability.
Description
Technical field:
The utility model relates to the back pressure regulator device that is used for various indoor displacement tests in the oil and gas exploitation.
Background technology:
Displacement test is a kind of standard method of estimating the oil and gas exploitation correlation technique, be in the displacement test system, with test fluid saturated core or tubule, and keep system outlet pressure with back-pressure valve, with injection pump displacement fluid injection rock core or tubule are carried out displacement test, thereby estimate influence such as displacing agent type, displacement pressure, temperature, rock core or slim tube parameters, other chemical addition agent etc. to the displacement effect, screen various chemical agent prescriptions, be oil-gas field development, improving recovery ratio provides reliable experimental technique data.The displacement test device can be divided into length coreflooding experiment device, slim-tube displacement experimental rig, normal flow dynamic test device, as permeability detector, acid solution flow tester etc., generally by injection pump, rock core (long or short rock core, or tubule), composition such as back-pressure valve, differential pressure indicator, insulating box, gas-liquid separation bottle, gas gauge, gas liqud chromatography instrument, electronic balance, other special displacement test needs its corollary equipment.In the displacement test process, with back-pressure valve back pressure is controlled to experimental pressure, under test temperature and pressure, use test fluid saturated core or tubule, the displacement fluid is injected from rock core or tubule inlet by constant speed or constant voltage with injection pump, carry out displacement test, from the fluid of back-pressure valve outlet line extraction, with separating bottle with gas-liquid separation, tolerance gas consumption meter metering, the liquid scales/electronic balance weighing, and with gas liqud chromatography instrument analysis component.Compare with other method, more near the actual conditions of oil and gas development, experimental data and evaluation result are more accurately and reliably for the displacement test method.
Back-pressure valve is the vitals of displacement test device, it is two formulas, connect the high pressure line and the fluid discharge pipe line of rock core outlet by it, its effect is a control rock core exit back pressure, keep the constant numerical value of back pressure in requirement of experiment, during experiment by the pressure that nitrogen pressure in the valve chamber is provided with the displacement flow test device port of export is set.Polytetrafluoroethylene (PTFE) back-pressure valve commonly used at present, it is constant that back pressure usually can not keep, more can not be used for the high temperature experiment condition, if adopt external metallic membrane back-pressure valve, except that price very the costliness, not strong to the adaptive capacity of high saliferous and perishable fluid, in experimentation, this two classes back-pressure valve all very easily causes whole the failure of an experiment, thereby influences conventional efficient.
Summary of the invention:
The purpose of this utility model is to provide a kind of displacement test back-pressure valve, and it is very little to use it can not cause back pressure decline and back pressure to fluctuate, and effectively keeps rock core outlet back pressure constant, and simultaneously cheap, raw material is easy to get, stable performance, and compliance is strong.
For reaching above technical purpose, the utility model by the following technical solutions.
A kind of displacement test back-pressure valve, it is a cylinder, mainly by valve body, cavity, metallic membrane, the fluid passage, centre bore, compositions such as needle, it is characterized in that, the cavity that has air vent is arranged in valve body, described metallic membrane is positioned at the cavity bottom, and and valve body, the cavity sealing, at the horizontal liquid passage, the intersection point place of vertical fluid passage upwards has a centre bore, described centre bore extends in the cavity, needle is arranged in centre bore, described needle passes metallic membrane, and needle needle point seat is encapsulated on the sealing mat between vertical channel and the centre bore, and screw-rod structure is taked at the needle top, all sealings have a through hole between described needle and metallic membrane and the centre bore between described horizontal channel and the metallic membrane.
The needle top is a screw-rod structure, utilizes nut that the sealing ring at needle top is pressed on the metallic membrane, and metallic membrane is formed last soft hard sealing down.Sealing ring between needle and centre bore separates the fluid passage of metallic membrane lower space with the needle bottom, is used to improve the stability of valve control.One sealing mat is arranged between vertical channel and the centre bore, and needle needle point seat is enclosed on the sealing pad, is used to close and open the flow channel of fluid.
Metallic membrane is positioned at the cavity bottom, and seals with valve body, cavity.The sealing of metallic membrane and valve body can be adopted viton seal ring.Sealing between metallic membrane and the cavity can be adopted the P type metal o-ring of particular design, its cross section P font structure that is shaped as horizontal positioned, a part is stretched out in the P bottom in circle, extension is not damage valve body and metallic membrane itself for convenience of dismounting.The hard sealing means of twice water wave groove is adopted in the sealing of P type metal o-ring and upper body, adopts the hard sealing means of metal o-ring distortion with the sealing of lower metal diaphragm.
Circular cavity is used for the inflated with nitrogen pressurization, and pressure acts on the metallic membrane, makes needle obtain downward power and allows needle needle point seat be enclosed on the sealing mat.The through metallic membrane bottom of through hole in the middle of the horizontal channel, make fluid can infiltrate the short space of metallic membrane bottom, increase pressure herein, make the pressure of metallic membrane bottom pressure less times greater than its top, produce small upwards pressure reduction, metallic membrane is moved upward, drive needle and move upward, valve is opened, fluid flows out from vertical channel, and the valve internal pressure descends, and the metallic membrane upper pressure is less times greater than its underpart pressure, produce small downward pressure reduction, metallic membrane is moved downward, drive needle and move downward, valve cuts out, so repeatedly, thus make that the valve upstream pressure is constant to be nitrogen pressure in the valve chamber.
The course of work of the utility model displacement test back-pressure valve is achieved in that before displacement and from adding pore the chamber aerating is depressed into experimental pressure that valve is in closed condition.With test fluid saturated core or tubule, to the test fluid difference that different experiments is adopted, some need adopt multiple fluid saturated core or tubule successively, sets up constraint hold-up degree, and keeps system outlet pressure with back-pressure valve.With injection pump displacement fluid injection rock core or tubule are carried out displacement test, fluid arrives its outlet by rock core or tubule under the displacement pressure effect, arrive back-pressure valve by high pressure line, horizontal channel by back-pressure valve enters in the valve, and by the arrival of the through hole between horizontal channel and cavity metallic membrane bottom, because valve is not opened, fluid pressure increases, make metallic membrane produce pressure reduction upwards up and down, metallic membrane produces small in top offset under this small differential pressure action, drive the needle that diaphragm therewith links to each other and move up, make the needle needle point break away from sealing mat under it a little, valve is opened, fluid will flow out from the vertical channel of valve, at this moment metallic membrane bottom pressure descends, and makes metallic membrane produce downward pressure reduction up and down, and metallic membrane produces small in bottom offset under this small differential pressure action, driving therewith, the continuous needle of diaphragm moves down, the needle needle point is closely contacted with sealing mat, valve cuts out, fluid just can not flow out from the vertical channel of valve.So repeatedly, thus finish accurate control to back pressure.
Compared with prior art, the utlity model has following beneficial effect: (1) can not cause back pressure to descend and back pressure fluctuates very little, make the fluid that flows out from rock core pass through its discharge, flow into the outlet low-pressure line smoothly, export the constant effect of back pressure thereby play the maintenance rock core; (2) utilize the movable part of metallic membrane as valve, metallic membrane can produce micro displacement under small differential pressure action, drive the continuous valve needle movements of diaphragm therewith, thereby valve is opened and closed, improved the sensitivity that valve opens and closes greatly, it is very little to start pressure reduction; (3) cheap, raw material is easy to get, stable performance, and compliance is strong.
Description of drawings:
Fig. 1 is the structural representation of the utility model displacement test back-pressure valve.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, a kind of displacement test back-pressure valve, it is a cylinder, mainly form, it is characterized in that the cavity 2 that has air vent 14 is arranged in valve body 1 by valve body 1, cavity 2, metallic membrane 4, horizontal channel 10, vertical channel 8, centre bore 15, needle 7 etc., described metallic membrane 4 is positioned at cavity 2 bottoms, and with the sealing of valve body, cavity, the P type metal o-ring 3 of particular design is adopted in the sealing between metallic membrane 4 and the cavity, adopts viton seal ring 5 with the sealing of valve body.In the horizontal channel 10, the intersection point place of vertical channel 8 upwards has a centre bore 15, described centre bore 15 extends in the cavity 2, needle 7 is arranged in centre bore, described needle 7 passes metallic membrane 4, one sealing mat 9 is arranged between described vertical channel 8 and the centre bore 15, needle needle point seat is enclosed on the sealing pad, is used to close and open the flow channel of fluid.Screw-rod structure is taked at the needle top, utilizes nut 13 that the sealing ring 12 at needle top is pressed on the metallic membrane 4, and metallic membrane is formed last soft hard sealing down.Sealing ring 6 between needle 7 and the centre bore 15 separates the vertical channel of metallic membrane lower space with the needle bottom, is used to improve the stability of valve control, and a through hole 11 is arranged between described horizontal channel 10 and the metallic membrane 4.
Claims (3)
1 one kinds of displacement test back-pressure valves, it is a cylinder, mainly by valve body (1), cavity (2), metallic membrane (4), fluid passage (8,10), centre bore (15), needle compositions such as (7), it is characterized in that, the cavity (2) that has air vent (14) is arranged in valve body (1), described metallic membrane (4) is positioned at the cavity bottom, and and valve body, the cavity sealing, in the horizontal channel (10), the intersection point place of vertical channel (8) upwards has a centre bore (15), described centre bore (15) extends in the cavity (2), needle (7) is arranged in centre bore, described needle (7) passes metallic membrane (4), needle needle point seat is encapsulated on the sealing mat (9) between vertical channel and the centre bore, screw-rod structure is taked at the needle top, all sealings have a through hole (11) between described horizontal channel (10) and the metallic membrane (4) between described needle (7) and metallic membrane (4) and the centre bore (15).
2 back-pressure valves as claimed in claim 1 is characterized in that, described metallic membrane (4) adopts viton seal ring with the sealing of valve body (1), adopt P type metal o-ring (3) with the sealing of cavity (2).
3 back-pressure valves as claimed in claim 2 is characterized in that, the hard sealing means of twice water wave groove is adopted in the sealing of described P type metal o-ring (3) and upper body, adopt the hard sealing means of metal o-ring distortion with the sealing of lower metal diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02276179 CN2564739Y (en) | 2002-08-19 | 2002-08-19 | Back-pressure valve for displacement experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02276179 CN2564739Y (en) | 2002-08-19 | 2002-08-19 | Back-pressure valve for displacement experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2564739Y true CN2564739Y (en) | 2003-08-06 |
Family
ID=33740081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02276179 Expired - Fee Related CN2564739Y (en) | 2002-08-19 | 2002-08-19 | Back-pressure valve for displacement experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2564739Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323287A (en) * | 2011-05-26 | 2012-01-18 | 中国石油天然气股份有限公司 | Semi-open system rock heating analogue means |
| CN102818054A (en) * | 2012-08-31 | 2012-12-12 | 中国石油天然气股份有限公司 | Assistance type pin type back-pressure control method and back-pressure valve thereof |
| CN103335140A (en) * | 2013-07-19 | 2013-10-02 | 成都皓瀚完井岩电科技有限公司 | Circumferential pressure return device |
| CN103912700A (en) * | 2014-04-18 | 2014-07-09 | 西南石油大学 | Ultrahigh-pressure high-temperature experimental back-pressure valve |
| CN104048078A (en) * | 2014-06-30 | 2014-09-17 | 无锡市威海达机械制造有限公司 | Air-operated ultrahigh-pressure one-way valve |
| CN109357976A (en) * | 2018-10-25 | 2019-02-19 | 中国海洋石油集团有限公司 | A kind of multiphase flow automatic collection metering system |
-
2002
- 2002-08-19 CN CN 02276179 patent/CN2564739Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323287A (en) * | 2011-05-26 | 2012-01-18 | 中国石油天然气股份有限公司 | Semi-open system rock heating analogue means |
| CN102818054A (en) * | 2012-08-31 | 2012-12-12 | 中国石油天然气股份有限公司 | Assistance type pin type back-pressure control method and back-pressure valve thereof |
| CN102818054B (en) * | 2012-08-31 | 2014-12-24 | 中国石油天然气股份有限公司 | Assistance type pin type back-pressure control method and back-pressure valve thereof |
| CN103335140A (en) * | 2013-07-19 | 2013-10-02 | 成都皓瀚完井岩电科技有限公司 | Circumferential pressure return device |
| CN103335140B (en) * | 2013-07-19 | 2015-08-26 | 成都皓瀚完井岩电科技有限公司 | A kind of circumferential back pressure device |
| CN103912700A (en) * | 2014-04-18 | 2014-07-09 | 西南石油大学 | Ultrahigh-pressure high-temperature experimental back-pressure valve |
| CN103912700B (en) * | 2014-04-18 | 2016-05-25 | 西南石油大学 | A kind of high pressure high temperature experiment back-pressure valve |
| CN104048078A (en) * | 2014-06-30 | 2014-09-17 | 无锡市威海达机械制造有限公司 | Air-operated ultrahigh-pressure one-way valve |
| CN109357976A (en) * | 2018-10-25 | 2019-02-19 | 中国海洋石油集团有限公司 | A kind of multiphase flow automatic collection metering system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106437637B (en) | High temperature and pressure carbon dioxide flooding super-viscous oil visualizes microcosmos experiment method | |
| CN110296921B (en) | Testing device and testing method for shale gas permeability under reservoir conditions in steady state method | |
| CN102121891A (en) | Device and method for testing molecular diffusion coefficients in multi-component oil-gas system under high temperature and high pressure | |
| Stegemeier et al. | A study of anomalous pressure build-up behavior | |
| CN2564739Y (en) | Back-pressure valve for displacement experiment | |
| CN102654045B (en) | Top air injection gravity-assisted flooding oil-extraction one-dimensional physical simulation experimental system | |
| CN104632158B (en) | Oil well response stage dividing and distinguishing method under carbon dioxide miscible displacement condition | |
| CN103912700B (en) | A kind of high pressure high temperature experiment back-pressure valve | |
| CN109883891A (en) | For the measuring device and method of the injection liquid phase diffusion coefficient of fracture-pore reservoir | |
| CN102128031A (en) | Simulation device and method for researching horizontal well gas-liquid two-phase pipe flow mechanism | |
| CN102654046B (en) | Top air-injection gravity auxiliary driving oil-extraction two-dimensional physical simulation experiment system | |
| CN113062722A (en) | Long core water-gas stable alternation and accurate volume oil displacement experimental method | |
| CN104215282A (en) | Gas flow measuring device and method for measuring gas flow using same | |
| CN108119132A (en) | DAMAGE OF TIGHT SAND GAS RESERVOIRS nearly well band Radial Flow Through Porous Media water saturation simulator and method | |
| CN108798655B (en) | Three-gas combined mining experimental device for coal bed gas loss | |
| CN107976529B (en) | Multifunctional reaction kettle experiment system and experiment method | |
| CN2451735Y (en) | Capillary down-hole pressure monitoring transmitter | |
| CN209400386U (en) | A kind of concrete sample saturation permeability coefficient test device | |
| CN110952958A (en) | Natural gas hydrate horizontal well balanced liquid drainage testing device and method | |
| CN112082900B (en) | Testing device and method for improving gas injection accuracy of long core of low-permeability reservoir | |
| CN216525791U (en) | Phase change simulation device and system for fluid in shale pores | |
| CN2606349Y (en) | Pressure differential mercury instrument | |
| CN112901143A (en) | Device for measuring influence of tight oil and gas reservoir crack development on productivity | |
| CN205027620U (en) | To grinding testing experiment device under ambient condition | |
| CN114965231A (en) | Experimental device suitable for metal tubular column material corrodes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |