CN109424332A - A kind of natural gas well constant pressure throttling apparatus - Google Patents
A kind of natural gas well constant pressure throttling apparatus Download PDFInfo
- Publication number
- CN109424332A CN109424332A CN201710720452.0A CN201710720452A CN109424332A CN 109424332 A CN109424332 A CN 109424332A CN 201710720452 A CN201710720452 A CN 201710720452A CN 109424332 A CN109424332 A CN 109424332A
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- Prior art keywords
- piston
- natural gas
- constant pressure
- gas well
- shell
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Abstract
The present invention relates to a kind of natural gas well constant pressure throttling apparatus, the constant pressure throttling apparatus includes shell and the piston that can move reciprocatingly in shell, described piston one end is connected with elastic device, the elastic device is fixed on spring limiting part, the other end of the piston, which is equipped with, to be open and is limited by piston limit part, corresponding position is equipped with the metering hole penetrated through with natural gas line to the shell on the outer periphery respectively with piston, and the metering hole passes through the inner cavity of piston and the open communication of piston.The size of automatic adjustment throttling set gas nozzle may be implemented in the present invention, realizes constant pressure throttling, reduces labor intensity, reduce costs, improve work efficiency.
Description
Technical field
The present invention relates to natural gas extraction technical fields, and in particular to a kind of natural gas well constant pressure throttling apparatus.
Background technique
In traditional gas exploitation course, the pressure in gas well well is higher, it is necessary in well head installation reducing pressure by regulating flow dress
The gas production for setting control gas well, can be only achieved the purpose of steady production.During reducing pressure by regulating flow, natural gas passes through flow nipple
Later pressure reduces rapidly, and volume increases sharply, therewith the also rapid drawdown of the temperature of natural gas, and usually all containing certain in natural gas
The moisture of ratio when natural gas temperature drops to the formation condition of hydrate, will condense hydrate, and hydrate will cause ground and set
Standby blocking influences the normal production of the natural gas well.As Authorization Notice No. is CN203540770U, authorized announcement date is
2014.04.16 Chinese utility model patent provides a kind of valve type air valve device, which includes valve body, valve
Intracoelomic cavity is divided into epicoele and cavity of resorption, and epicoele is intracavitary under to be equipped with gear shaft, and gear shaft is equipped with gear, passes through chain between gear
Item transmission connection, gas nozzle are fixed on chain, and gas nozzle component is overhauled and replaced by gear drive chain after blocking,
And the apparatus structure is complex, needs to manually check in use and replaces gas nozzle component manually, influences manufacturing schedule, reduce
Efficiency.
For this purpose, recent domestic develops downhole choke technology, above-mentioned surface throttling mode is transferred to downhole choke, benefit
With underground itself hot environment, throttling, decompression, expansion, cooling and the endothermic process of natural gas are completed, improves natural gas decompression section
Outlet temperature after stream improves gas well yield to prevent hydrate frozen block.And flow controller used at present is mostly fixed gas nozzle
Flow controller, it is necessary to which different grades of throttle power is realized with taking pulling operation to replace various sizes of flow nipple by closing well
Can, so that natural gas well yield can not be adjusted in time, manufacturing schedule is influenced, increases operating cost and risk.
Summary of the invention
The purpose of the present invention is to provide a kind of natural gas well constant pressure throttling apparatus, solve gas well different production periods because
Pressure, the change of production of natural gas lead to the problem of can not normally producing, influence working efficiency.
To achieve the above object, the first technical solution of natural gas well constant pressure throttling apparatus of the invention is: Yi Zhongtian
Right gas well constant pressure throttling apparatus, the constant pressure throttling apparatus include shell and the piston that can move reciprocatingly in shell, institute
It states piston one end and is connected with elastic device, the elastic device is fixed on spring limiting part, and the other end of the piston is equipped with
It is open and passes through piston limit part and limit, corresponding position is equipped with and natural gas line on the outer periphery respectively for the shell and piston
The metering hole of perforation, the metering hole pass through the inner cavity of piston and the open communication of piston.
Second of technical solution of natural gas well constant pressure throttling apparatus of the invention is: the elastic device is by pressure spring peace
Weigh block composition, and one end of the balance weight and the piston rod of piston connect, and the other end of the balance weight is connect with pressure spring, described
Pressure spring is fixed on spring limiting part.
The third technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of the first technical solution of throttling set, the shell is aligned with the metering hole of piston to be connected to and pore size one
It causes.
4th kind of technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of second of technical solution of throttling set, baffle, the gear are equipped in the shell between piston and balance weight
Plate is equipped with the pilot hole passed through for piston rod.
5th kind of technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of second of throttling set or the 4th kind of technical solution, the balance weight is equipped with groove, and the groove is convenient for living
Stopper rod end connect with balance weight and limits piston rod and piston in housing inner diameter to rotation.
6th kind of technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of 5th kind of technical solution of throttling set, the piston rod is one.
7th kind of technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of the first technical solution of throttling set, the both sides in the piston restriction hole are respectively equipped with circumferentially to be arranged along piston
Sealing ring.
8th kind of technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of the first or second of technical solution of throttling set, the spring limiting part and piston limit part are with outer spiral shell
The annulus of line.
9th kind of technical solution of natural gas well constant pressure throttling apparatus of the invention is: in natural gas well constant pressure of the invention
On the basis of 8th kind of technical solution of throttling set, the natural gas line and shell pass through welded connecting.
The beneficial effects of the present invention are: the pressure that is generated on piston by the high pressure gas that natural gas line is come in and flat
Under the collective effect of the pressure spring elastic force to weigh on block, piston is enabled to automatically adjust current limliting according to the pressure size of high pressure gas
The openings of sizes in hole realizes that the pressure size at gas outlet is constant, so that pressure of the gas well in different production period natural gases
Power, yield can be produced normally when changing.
Further, it is equipped with the pilot hole passed through for piston rod on baffle, piston rod is positioned, and piston rod
It is longer, it is also not susceptible to be broken in reciprocatory movement.
Further, balance weight is equipped with groove, connect convenient for piston rod with balance weight, is also able to achieve and determines piston rod
Position.
Further, the both sides in piston restriction hole are respectively equipped with the sealing ring being circumferentially arranged along piston, and sealing ring can be right
The contact portion of piston and shell is sealed, and prevents natural-gas from revealing.
Further, shell can the corresponding position setting one on excircle according to the quantity of natural gas line with piston
A or multiple metering holes, can accelerate the production efficiency of gas well.
Further, natural gas line and shell not only can guarantee the secured of junction, but also weld by being welded to connect
Position air-tightness it is also preferable.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment one of natural gas well constant pressure throttling apparatus of the invention；
Fig. 2 is the schematic diagram of the embodiment two of natural gas well constant pressure throttling apparatus of the invention；
Fig. 3 is the schematic diagram of the embodiment three of natural gas well constant pressure throttling apparatus of the invention；
Fig. 4 is the schematic diagram of the example IV of natural gas well constant pressure throttling apparatus of the invention；
Fig. 5 is the schematic diagram of the embodiment seven of natural gas well constant pressure throttling apparatus of the invention.
In figure: 1, pressure spring locating part；2, pressure spring；3, balance weight；4, shell；5, piston；6, sealing ring；7, piston limit
Part；8, gas outlet；9, metering hole；10, air inlet；11, admission line；12, piston rod；13, pilot hole；14；Groove.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment one of natural gas well constant pressure throttling apparatus of the invention, as shown in Figure 1, a kind of natural gas well constant pressure
Throttling set, including shell 4, piston 5,3 three parts of balance weight.The left and right ends of shell 4 are equipped with threaded hole, on the threaded hole of left end
Equipped with the pressure spring locating part 1 for connecting pressure spring 2, right end threaded hole is equipped with the piston limit for being limited to piston rod
Part 7, pressure spring locating part 1 and 7 collective effect of piston limit part move to guarantee that piston rod can be moved back and forth without departing from it
Range.The position corresponding with the upper side of piston 5 of shell 4 is equipped with metering hole 9, metering hole 9 and natural gas air inlet pipe line 11
Air inlet 10 is connected to, and metering hole 9 changes the size of opening, and then change day by reciprocating movement of the piston 5 shell 4 inside
Right gas enters the flow of 5 inner cavity of piston, plays the role of current limliting.The inner cavity of piston 5 passes through the piston limit part 7 of right end and goes out
Port 8 is connected to, and to guarantee that natural-gas can be discharged timely, the both ends of metering hole 9 are equipped with sealing ring 6, natural to guarantee
Gas does not diffuse into 4 left end of shell after flowing into metering hole 9 and 5 inner cavity of piston and leaks out.The piston rod of 5 left end of piston
12 are connected by the pilot hole 13 on baffle with the groove 14 on balance weight 3, and pressure spring 2,13 He of pilot hole are connected on balance weight 3
Groove 14 all plays positioning and guiding to piston rod, makes piston rod 12 will not run-off the straight and radial direction turn in reciprocatory movement
It is dynamic, be also prevented from piston rod 12 because stress it is excessive caused by be broken.
Specifically, in embodiment, when work, the natural gas in gas well flows into piston by the air inlet 10 of admission line 11
5 with the metering hole 9 of 4 upper side of shell, it is identical as 8 gas pressure of gas outlet in air inlet 10 hence into the inner cavity of piston 5
When, piston 5 is aligned with the metering hole 9 of 4 upper side of shell and is connected to, and pore size is identical, and opening is maximum at this time, piston 5
The elastic force of suffered gas pressure and pressure spring 2 reaches balance.Gas when the gas discharge of gas well increases, at air inlet 10
Pressure rises, while pressure suffered by 5 intracavity section of piston just will increase, and the piston rod 12 on piston 5 will under pressure
It can be moved to the left and push balance weight 3,3 compression press spring 2 of balance weight, phase will occur for piston 5 and the metering hole 9 of 4 upper side of shell
To displacement, reduce the opening of metering hole 9, generates chock pressure difference, so that the inner chamber gas pressure of piston 5 reduces, outlet
Pressure also declines therewith.When the gas discharge of gas well reduces, the gas pressure at air inlet 10 declines, while in piston 5
Pressure suffered by chamber section will reduce, and move right in the elastic force effect lower piston 5 of pressure spring 2, piston 5 and 4 upper side of shell
Metering hole 9 relative displacement will occur, increase the opening of metering hole 9, so that the outlet pressure of gas outlet 8 increases.Pass through
The elastic force collective effect of 5 inner chamber gas pressure of piston and pressure spring 2 makes piston 5 ceaselessly automatically adjust the openings of sizes of metering hole 9,
So that outlet pressure consistently achieves balance, to realize the purpose of constant pressure.
The embodiment two of natural gas well constant pressure throttling apparatus of the invention: as shown in Fig. 2, the difference with embodiment one
It is do not have balance weight 3 and baffle between the piston 5 and pressure spring, directly connect with pressure spring 2.
The embodiment three of natural gas well constant pressure throttling apparatus of the invention: as shown in figure 3, the difference with embodiment one
It is, is not provided with baffle between piston 5 and balance weight 3 in the shell 4.
The example IV of natural gas well constant pressure throttling apparatus of the invention: as shown in figure 4, the difference with embodiment one
It is, the piston rod 12 is two, and the groove 14 on pilot hole 13 and balance weight on corresponding baffle is also two.
The embodiment five of natural gas well constant pressure throttling apparatus of the invention: with embodiment one the difference is that, it is described
Sealing ring is gasket or sealing ring.
The embodiment six of natural gas well constant pressure throttling apparatus of the invention: with embodiment one the difference is that, it is described
Locating part puts in shell for a part and does stop section, has bolt hole on another part, and be bolted the both ends of shell
Portion.
The embodiment seven of natural gas well constant pressure throttling apparatus of the invention: as shown in figure 5, the difference with embodiment one
It is, the quantity of the natural gas line is two, and corresponding air inlet 10 and metering hole 9 are also two.
The elastic force of pressure and pressure spring that the flow that the present invention is entered by natural gas gas in piston cavity generates is made jointly
With moving back and forth piston ceaselessly to adjust the openings of sizes of metering hole, so that the pressure in gas outlet remains unchanged.This
Neither will cause decompression suddenly and generate gas hydrates, can also be generated according to natural gas pressure size be changed without gas nozzle and from
The dynamic size for adjusting metering hole improves efficiency to realize the normal production of gas well.
Claims (9)
1. a kind of natural gas well constant pressure throttling apparatus, it is characterised in that: the constant pressure throttling apparatus includes shell and in shell
The piston that can be moved reciprocatingly, described piston one end are connected with elastic device, and the elastic device is fixed on spring limiting part
On, the other end of the piston, which is equipped with, to be open and is limited by piston limit part, and the shell is right on the outer periphery respectively with piston
The position answered is equipped with the metering hole penetrated through with natural gas line, and the metering hole is connected by the inner cavity of piston and the opening of piston
It is logical.
2. natural gas well constant pressure throttling apparatus according to claim 1, it is characterised in that: the elastic device by pressure spring and
Balance weight composition, one end of the balance weight and the piston rod of piston connect, and the other end of the balance weight is connect with pressure spring, institute
Pressure spring is stated to be fixed on spring limiting part.
3. natural gas well constant pressure throttling apparatus according to claim 1, it is characterised in that: the current limliting of the shell and piston
Hole alignment is connected to and pore size is consistent.
4. natural gas well constant pressure throttling apparatus according to claim 2, it is characterised in that: in piston peace in the shell
Baffle is equipped between weighing apparatus block, the baffle is equipped with the pilot hole passed through for piston rod.
5. natural gas well constant pressure throttling apparatus according to claim 2 or 4, it is characterised in that: the balance weight is equipped with
Groove, the groove connect with balance weight and limit piston rod and piston in housing inner diameter to rotation convenient for piston rod end.
6. natural gas well constant pressure throttling apparatus according to claim 5, it is characterised in that: the piston rod is one.
7. natural gas well constant pressure throttling apparatus according to claim 1, it is characterised in that: the both sides in the piston restriction hole
It is respectively equipped with the sealing ring being circumferentially arranged along piston.
8. natural gas well constant pressure throttling apparatus according to claim 1 or 2, it is characterised in that: the spring limiting part and
Piston limit part is with externally threaded annulus.
9. natural gas well constant pressure throttling apparatus according to claim 8, it is characterised in that: the natural gas line and shell
Pass through welded connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720452.0A CN109424332B (en) | 2017-08-21 | 2017-08-21 | Natural gas well constant pressure throttling arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720452.0A CN109424332B (en) | 2017-08-21 | 2017-08-21 | Natural gas well constant pressure throttling arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109424332A true CN109424332A (en) | 2019-03-05 |
| CN109424332B CN109424332B (en) | 2021-09-03 |
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ID=65498638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710720452.0A Active CN109424332B (en) | 2017-08-21 | 2017-08-21 | Natural gas well constant pressure throttling arrangement |
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| Country | Link |
|---|---|
| CN (1) | CN109424332B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233532A (en) * | 2021-12-30 | 2022-03-25 | 亚普汽车部件股份有限公司 | Flexible electric control valve, electric control fuel system and control method of electric control valve |
| CN114534890A (en) * | 2022-02-14 | 2022-05-27 | 陈光付 | Medium-speed multi-stage coal mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201715057U (en) * | 2010-06-18 | 2011-01-19 | 同济大学 | Balance piston induction type pneumatic pressure relief valve |
| CN104343426A (en) * | 2013-08-02 | 2015-02-11 | 中国石油天然气股份有限公司 | System and technology for intelligent throttling in natural gas well |
| WO2016073675A1 (en) * | 2014-11-06 | 2016-05-12 | M-I L.L.C. | Piston choke control |
| CN106285580A (en) * | 2016-09-30 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of underground throttle device |
| CN107061817A (en) * | 2017-02-03 | 2017-08-18 | 中国石油化工股份有限公司 | A kind of trequency piston type constant pressure valve |
-
2017
- 2017-08-21 CN CN201710720452.0A patent/CN109424332B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201715057U (en) * | 2010-06-18 | 2011-01-19 | 同济大学 | Balance piston induction type pneumatic pressure relief valve |
| CN104343426A (en) * | 2013-08-02 | 2015-02-11 | 中国石油天然气股份有限公司 | System and technology for intelligent throttling in natural gas well |
| WO2016073675A1 (en) * | 2014-11-06 | 2016-05-12 | M-I L.L.C. | Piston choke control |
| CN106285580A (en) * | 2016-09-30 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of underground throttle device |
| CN107061817A (en) * | 2017-02-03 | 2017-08-18 | 中国石油化工股份有限公司 | A kind of trequency piston type constant pressure valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233532A (en) * | 2021-12-30 | 2022-03-25 | 亚普汽车部件股份有限公司 | Flexible electric control valve, electric control fuel system and control method of electric control valve |
| CN114534890A (en) * | 2022-02-14 | 2022-05-27 | 陈光付 | Medium-speed multi-stage coal mill |
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| Publication number | Publication date |
|---|---|
| CN109424332B (en) | 2021-09-03 |
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