CN205136714U - Ejector pin formula back pressure system - Google Patents
Ejector pin formula back pressure system Download PDFInfo
- Publication number
- CN205136714U CN205136714U CN201520901377.4U CN201520901377U CN205136714U CN 205136714 U CN205136714 U CN 205136714U CN 201520901377 U CN201520901377 U CN 201520901377U CN 205136714 U CN205136714 U CN 205136714U
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- pressure
- valve
- needle
- back pressure
- buffer tank
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Abstract
The utility model relates to an ejector pin formula back pressure system belongs to conventional gas and oil experiment technical field, and the key feature is the imported interface and the certain pressure nitrogen buffer tank of the pipe connection preliminary filling between the advection valve of backpressure valve, nitrogen buffer tank's a bottom connection pressure governor pump gear, the cone needle of needle sealing washer is connected to ejector pin front end axial in the back pressure valve body, and the cone needle holds the needle groove phase that has the valve body of drain pipe to laminate with corresponding, the utility model discloses a stability is not enough when installing the certain pressure nitrogen buffer tank of preliminary filling additional solving the device operation of present back pressure system before the valve body, and prefabricated in cone needle that ejector pin front end axial adds case polysulfone resin sealing washer and the valve body have that to mate and be connected the needle groove phase laminating of drain pipe airtight with the needle, has solved effectively that present back pressure system device pressure precision is not enough, the difficult accuracy of measurement, the backpressure valve is fragile and the problem of operating numerous lock. Through the utility model discloses a back pressure pressure accurate control, pressure adjustment convenient and fast and life prolong greatly in the experimentation.
Description
Technical field
The utility model relates to a kind of post rod type back pressure system, is the system applying rock core pore pressure in petroleum industry laboratory experiment flow process.Formation fluid is composed with high-temperature high-pressure state and is stored in stratum, rock core should keep formation condition all the time in saturated and displacement process, back pressure system is generally arranged on rock core end, only have rock core inner pore pressure to be greater than back pressure system and pre-set force value, back-pressure valve just can be opened, and rock core inner fluid just can flow out rock core.Be simulated formation full-scale condition in experimentation, under the pressure controling precision of back pressure system, harsh conditions, traveling comfort seems particularly important, belongs to conventional gas and oil experimental technique field.
Background technique
Domestic used back-pressure valve is of a great variety at present, is broadly divided into two large classes.One class is piston type back pressure valve, is cylindrical metal plush copper bottom valve, and shortcoming is that rock core end fluid to enter after cavity because metal plush copper lifting surface area is bigger than normal, is greater than preset pressure 0.5MPa rear valve body and just can opens, have deviation with preset pressure value to inlet pressure.The another auxiliary liquid stream interface be communicated with liquid inlet pipe that is also provided with in valve body side causes rock core end effluent measuring accuracy not and operates cumbersome.Another kind of is sheet type back-pressure valve, sheet type back-pressure valve built-in metal thin slice is more responsive to pressure surge, pressure controling precision improves, but because sheet metal lifting surface area is excessive, in use easily form unbalance stress and cause distortion, especially to be very easily out of shape or breakdown at sheet metal because of infusion phase-state change or when unloading build-up of pressure vertical excitation in back pressure process, fit with lower rubber "O"-ring and lost efficacy, cause thin slice two-way pressure ditch to pass to back-pressure valve and damage the failure of an experiment, under sheet metal, " O " type rubber ring is also easily etched damage because of the fluid touching some corrosivity large, affect the working life of back-pressure valve.
Model utility content
The purpose of this utility model is to provide a kind of post rod type back pressure system, solve in existing back pressure system adopt piston type back pressure valve or sheet type back-pressure valve to exist with preset pressure value have deviation or because of sheet metal lifting surface area excessive, in use easily form unbalance stress and cause the deficiencies such as distortion, realize that back pressure pressure in experimentation accurately controls, pressure adjusting is convenient and swift by the utility model and greatly extend working life.
The purpose of this utility model is achieved through the following technical solutions, a kind of post rod type back pressure system, comprise the back-pressure valve be placed in air bath, pressure transducer, advection valve and nitrogen bottle that the import interface of back-pressure valve connects through pipeline, it is characterized in that, the import interface of described back-pressure valve is connected preliminary filling certain pressure nitrogen buffer tank with the pipeline between advection valve, and the bottom Bonding pressure of nitrogen buffer tank regulates pump; Push rod front end in back pressure valve body axially connects the cone needle of needle seal ring, and the needle groove that cone needle and corresponding end have the valve body of drain pipe fits.
Described needle seal ring is polysulfone resin seal ring.
The nitrogen buffer tank that described back-pressure valve is connected with pipeline between one-way valve is placed in air bath.
Described nitrogen buffer tank and pressure regulate in the connecting tube of pump and access one-way valve.
Knock out drum pressure is 70MPa, single chamber volume 1000ml.
When the utility model solves existing back pressure system plant running by installing preliminary filling certain pressure nitrogen buffer tank before valve body additional, stability is inadequate, the cone needle that push rod front end axially installs band polysulfone resin seal ring additional mate with needle and the needle groove being connected drain pipe fits airtight with being prefabricated with in valve body, efficiently solve existing back pressure system device pressure precision not, measure not easily accurate, back-pressure valve is fragile and operate cumbersome problem.Achieve that back pressure pressure in experimentation accurately controls, pressure adjusting is convenient and swift by the utility model and greatly extend working life.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is A portion structure for amplifying schematic diagram in the utility model;
In figure, 1 valve body, 2 push rods, 3 push rod seal rings, 4 needles, 5 needle seal rings, 6 needle grooves, 7 drain pipes, 8 liquid outlet joint, 9 inlet line, 10 import interfaces, 11 cavitys, 12 liquid inlet pipes, 13 feed liquor interfaces, 14 pressure transducers, 15 knock out drums, 16 one-way valves, 17 nitrogen bottles, 18 pressure regulate pump, 19 air baths.
Embodiment
The utility model is further illustrated by reference to the accompanying drawings with real examination example, as shown in Figure 1, 2, the utility model comprises the back-pressure valve of valve body 1, push rod 2, push rod seal ring 3, needle 4, needle seal ring 5, needle groove 6, drain pipe 7, liquid outlet joint 8, inlet line 9, import interface 10, cavity 11, liquid inlet pipe 12, feed liquor interface 13 formation, and pressure transducer 14, knock out drum 15, one-way valve 16, nitrogen bottle 17, pressure regulate pump 18, one-way valve, air bath 19 and annex to form temperature control device.Back-pressure valve import interface 10 in air bath 19 is through pipeline Bonding pressure sensor 14, one-way valve 16 and nitrogen bottle 17, the import interface 10 of back-pressure valve is connected preliminary filling certain pressure nitrogen buffer tank 15 with the pipeline between one-way valve 16, and the bottom Bonding pressure of nitrogen buffer tank 15 regulates pump 18; Push rod 2 front end in back pressure valve body axially connects the cone needle 4 of needle seal ring 5, and cone needle 4 fits with the needle groove 6 being connected drain pipe 7 in valve body; Needle seal ring 5 is polysulfone resin seal ring; The nitrogen buffer tank 15 that between back-pressure valve with one-way valve 16, pipeline is connected is placed in air bath 19; Nitrogen buffer tank 15 and pressure regulate in the connecting tube of pump 18 and access one-way valve; Knock out drum 15 pressure is 70MPa, single chamber volume 1000ml.
During experiment, open air bath 19 constant temperature to experimental temperature, open advection valve 16 and be communicated with nitrogen bottle 17 and knock out drum 15, observe pressure transducer 14, then regulate pump 18 to regulate pressure to experiment back pressure pressure through pressure.Nitrogen enters in valve body 1 from knock out drum 15 through import interface 10, inlet line 9, compressing push rod 2 makes it run until needle 4 and needle groove 6 are fitted airtight completely downwards, make push rod 2 and valve body 1 gapless because being with push rod seal ring 3 parcel outside push rod 2, the nitrogen of institute's preset pressure cannot enter cavity 11.Rock core end effluent enters cavity 11 through feed liquor interface 13, liquid inlet pipe 12, along with effluent increases, push rod 2 lower end surface is exerted pressure gradually, being greater than after preset pressure value until pressure forces push rod 2 to move upward, cavity 11 volume is increased gradually, treat that needle 4 and needle groove 6 have enough large gap, effluent flows out back-pressure valve through drain pipe 7, liquid outlet joint 8.
Knock out drum 15 in the utility model, one-way valve 16, one-way valve, nitrogen bottle 17, pressure regulate pump 18, pressure transducer 14, air bath 19 is existing product.
Claims (4)
1. a post rod type back pressure system, comprise the back-pressure valve be placed in air bath, pressure transducer, advection valve and nitrogen bottle that the import interface of back-pressure valve connects through pipeline, it is characterized in that, the import interface of described back-pressure valve is connected preliminary filling certain pressure nitrogen buffer tank with the pipeline between advection valve, and the bottom Bonding pressure of nitrogen buffer tank regulates pump; Push rod front end in back pressure valve body axially connects the cone needle of needle seal ring, and the needle groove that cone needle and corresponding end have the valve body of drain pipe fits.
2. post rod type back pressure system according to claim 1, is characterized in that, described needle seal ring is polysulfone resin seal ring.
3. post rod type back pressure system according to claim 1, is characterized in that, the nitrogen buffer tank that described back-pressure valve is connected with pipeline between one-way valve is placed in air bath.
4. post rod type back pressure system according to claim 1, is characterized in that, described nitrogen buffer tank and pressure regulate in the connecting tube of pump and accesses one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520901377.4U CN205136714U (en) | 2015-11-13 | 2015-11-13 | Ejector pin formula back pressure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520901377.4U CN205136714U (en) | 2015-11-13 | 2015-11-13 | Ejector pin formula back pressure system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205136714U true CN205136714U (en) | 2016-04-06 |
Family
ID=55622509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520901377.4U Expired - Fee Related CN205136714U (en) | 2015-11-13 | 2015-11-13 | Ejector pin formula back pressure system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205136714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963691A (en) * | 2020-08-18 | 2020-11-20 | 西南石油大学 | Small-size high-temperature high-pressure back-pressure valve with line diaphragm |
| CN113504351A (en) * | 2021-05-20 | 2021-10-15 | 中国石油大学(北京) | Compact core displacement experimental device |
-
2015
- 2015-11-13 CN CN201520901377.4U patent/CN205136714U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963691A (en) * | 2020-08-18 | 2020-11-20 | 西南石油大学 | Small-size high-temperature high-pressure back-pressure valve with line diaphragm |
| CN113504351A (en) * | 2021-05-20 | 2021-10-15 | 中国石油大学(北京) | Compact core displacement experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20161113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |