CN106761603A - A kind of high-pressure opening gas lift valve suitable for deepwater - Google Patents
A kind of high-pressure opening gas lift valve suitable for deepwater Download PDFInfo
- Publication number
- CN106761603A CN106761603A CN201611243903.8A CN201611243903A CN106761603A CN 106761603 A CN106761603 A CN 106761603A CN 201611243903 A CN201611243903 A CN 201611243903A CN 106761603 A CN106761603 A CN 106761603A
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- China
- Prior art keywords
- valve
- pressure
- nitrogen
- bellows
- gas lift
- 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.)
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000007789 gas Substances 0.000 claims abstract description 69
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 51
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 229920002545 silicone oil Polymers 0.000 claims description 12
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000010009 beating Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 25
- 239000007924 injection Substances 0.000 description 25
- 239000003921 oil Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000872 buffer Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of high-pressure opening gas lift valve suitable for deepwater, including fishing head, nitrogen chamber top connection, nitrogen room housing, stem guiding cylinder, valve fluid intake, valve seat sheath and the one-way overflow valve being sequentially connected；High-pressure bellows are provided with the nitrogen room housing, annular compartment is formed between the high-pressure bellows and the nitrogen room housing；Valve rod is equipped with the high-pressure bellows and in stem guiding cylinder, the lower end of the valve rod is connected with the valve ball in the valve fluid intake, valve seat is provided with the valve seat sheath.Nitrogen by preliminary filling certain pressure in high-pressure bellows exterior chamber of the invention, gas lift valve is set to open 2~2.5 times that pressure is pre- nitrogen charging pressure, greatly improve gaslift Opening pressure, the gas lift valve has streamlined seat simultaneously, make the gas of huge discharge by hgher efficiency, it is more stable, continual and steady production requirement is injected to gas-lift production unlatching high, huge discharge under the marine deep-well of satisfaction, deepwater work environment.
Description
Technical field
It is more particularly to a kind of for deepwater gaslift the present invention relates to marine deepwater artificial lift technology
High pressure bellows gas lift valve.
Background technology
Traditional gaslift technology is used widely in shallow water oil field development, and the maximum injection Opening pressure of gas lift system is not
More than 15MPa, gas injection rate is below daily 100,000 side, and conventional so-called high pressure gas lift valve, such as patent one kind can pulling it is high
Pressure gas lift valve, the inner signified high pressure gas lift valve of the patent No. 201320162934.6 is that gas lift valve entirety voltage endurance capability is high, does not refer to valve
Open operating pressure high, be only applicable to land well and oil reservoir depth is shallower, the production relatively low offshore shelf well of pressure.It is traditional in addition
The pressure loss higher can be caused during the normal gas injection of blunt form gaslift valve base, may be made in the case of huge discharge gas injection
Into the unstable of oil jacket annular space, cause larger flow to change, or even sprayed between appearance, it is impossible to ensure the reliability of gas injection.With
Deep water hydrocarbon field is developed direction deeper towards water, that offshore is farther, environment is more complicated and is developed, and oil field development will not only ensure pit shaft
Interior artificial lift, in some environments, it is also to be ensured that smooth flow of the fluid in the tieback pipeline long of seabed, the distance that can be conveyed
As far as possible.When production is aided in using gaslift, such as in more than depth of water 300m because its operation element pressure is larger, lift-gas injection pressure
Power will reach more than 15MPa, and gas injection rate is up to daily tens side even hundreds of ten thousand sides, it is necessary to keep remaining higher at underwater well head
Well head pressure meet remote defeated requirement.Therefore traditional gaslift technology does not adapt to the requirement of deepwater development.Operator faces institute
Installation system will disclosure satisfy that the requirement continual and steady to high reliability and gas injection of deepwater work environment.
The content of the invention
The purpose of the present invention is to overcome deficiency of the prior art, there is provided a kind of high-pressure opening gas suitable for deepwater
Valve is lifted, gas lift valve of the present invention can be used for deep water gas injection and adopt liquid, effectively lifting gas lift valve opens pressure, greatly improves injection depth,
To increase oil well output, while the gas lift valve has streamline valve seat, gas is more stable by hgher efficiency, meets marine deep water
Requirement of the operating environment to high-performance and continuous stability.
The technical solution adopted in the present invention is：A kind of high-pressure opening gas lift valve suitable for deepwater, including by upper
The fishing head that is sequentially connected under, nitrogen chamber top connection, nitrogen room housing, stem guiding cylinder, valve fluid intake, valve seat sheath and
One-way overflow valve；Be provided with high-pressure bellows in the nitrogen room housing, the high-pressure bellows and the nitrogen room housing it
Between form annular compartment；Valve rod, the upper end of the valve rod are equipped with the high-pressure bellows and in stem guiding cylinder
Cylinder boss is provided with, the upper surface of the high-pressure bellows is connected with the lower surface of the cylinder boss of the valve rod, described
The lower surface of high-pressure bellows is connected with the top in stem guiding cylinder；The lower end of the valve rod is connected with positioned at described
Valve ball in valve fluid intake, the valve seat being engaged with the valve ball is provided with the valve seat sheath.
Filled with the nitrogen for making the high-pressure bellows compression be in compressive state in the chamber.
The silicone oil of the inside and outside impact of the helpful buffering high-pressure bellows of filling in the chamber.
The endoporus of the valve seat uses streamline channel.
The beneficial effects of the invention are as follows：
1. gas lift valve of the present invention can make the increase of gas injection depth with opening pressure higher；
2. in the present invention, high-pressure bellows inside increases valve rod support can reduce high-pressure bellows deformation, improve resistance to pressure
Degree；
3. in the present invention, the annular space chamber formed between high-pressure bellows and nitrogen room housing is filled with nitrogen, pre-filled
Nitrogen high-pressure bellows outside is pressurized in compressive state, gaslift valve opening pressure is acted on inside high-pressure bellows, by
Difference is accumulated in so that Opening pressure is enhanced in high-pressure bellows interior outside is acted on, and it is preliminary filling gas lift valve is opened pressure
2~2.5 times of nitrogen pressure, under relatively low preliminary filling nitrogen pressure, realize high-pressure opening gas lift valve；
4. in the present invention, silicone oil is full of in the annular space chamber formed between high-pressure bellows and nitrogen room housing, works as valve rod
To during upper limit, silicone oil helps buffer the inside and outside impact of high-pressure bellows, is effectively protected high-pressure bellows；
5. in the present invention, valve seat uses streamline channel, gas lift valve mistake of the present invention in the case of identical gas injection pressure, gas injection rate
Valve pressure difference is obviously reduced, the more stable reliability of gas injection.
Brief description of the drawings
Fig. 1：Gas lift valve structural representation of the present invention；
Fig. 2：Nitrogen room housing and stem position schematic diagram under original state of the present invention；
Fig. 3：Original state lower valve ball of the present invention and seating position schematic diagram；
Fig. 4：Gas lift valve completely closed state lower valve ball of the present invention and seating position schematic diagram；
Fig. 5：Gas lift valve full open position lower valve ball of the present invention and seating position schematic diagram；
Fig. 6：Nitrogen room housing and stem position schematic diagram under gas lift valve full open position of the present invention.
Accompanying drawing is marked：1st, fishing head；2nd, nitrogen chamber top connection；3rd, high-voltage one-way valve；4th, nitrogen room housing；5th, high pressure ripple
Pipe；6th, valve rod；7th, stem guiding cylinder；8th, upper seal combination；9th, valve ball；10th, valve seat；11st, valve seat sheath；12nd, lower seal combination；
13rd, one-way overflow valve；14th, metal sealing；15th, valve fluid intake；16th, streamline channel；17th, silicone oil；18th, preset clearance；19、
Preset clearance；20th, chamber.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in accompanying drawing 1 to Fig. 6, a kind of high-pressure opening gas lift valve suitable for deepwater, including from top to bottom pass through
Fishing head 1, nitrogen chamber top connection 2, nitrogen room housing 4, stem guiding cylinder 7, valve fluid intake 15, valve seat that screw thread is sequentially connected
Sheath 11 and one-way overflow valve 13.Wherein, the fishing head 1 enters gas lift valve of the present invention under being used for, when gas lift valve of the present invention is gone into the well
When, the fishing head 1 can be connected by steel wire operation and put into the side-pocket mandrel gone into the well in advance gas lift valve of the present invention；Institute
Well liquid flows back to oil jacket annular space when stating one-way overflow valve 13 for preventing tubing pressure to be more than gas injection pressure.
High-voltage one-way valve 3 is provided with the nitrogen chamber top connection 2.
Be provided with high-pressure bellows 5 in the nitrogen room housing 4, the high-pressure bellows 5 and the nitrogen room housing 4 it
Between formed silicone oil 17 and nitrogen be filled with annular space chamber 20, the chamber 20.During valve rod 6 to upper limit, silicone oil 17
Help buffers the inside and outside impact of high-pressure bellows 5, is effectively protected high-pressure bellows 5；Pre-filled nitrogen makes high pressure
The outside of bellows 5 is pressurized and is in compressive state, and gaslift valve opening pressure is acted on inside high-pressure bellows 5, due to acting on height
The pressure interior outside of bellows 5 accumulates in difference so that Opening pressure is enhanced, and it is the 2 of pre- nitrogen charging pressure gas lift valve is opened pressure
~2.5 times, under relatively low preliminary filling nitrogen pressure, realize high-pressure opening gas lift valve.
Valve rod 6 is equipped with the high-pressure bellows 5 and in stem guiding cylinder 7, the upper end of the valve rod 6 is set
There is cylinder boss, taper surface is designed between the upper surface of its cylinder boss and the body of valve rod 6；The high-pressure bellows 5 it is upper
End face is welded to connect with the lower surface of the cylinder boss of the valve rod 6, and the lower surface of the high-pressure bellows 5 is led with the valve rod
Connected to the upper weld in cylinder 7.
The lower end of the valve rod 6 is connected through a screw thread the valve ball 9 in the valve fluid intake 15, wherein, it is described
Several equal diameter through holes are circumferentially offered on the midfeather of valve fluid intake 15, fluid is by that can enter gas of the present invention after through hole
Lift inside valve.The valve seat 10 being engaged with the valve ball 9 is provided with the valve seat sheath 11；The valve ball 9 and the valve seat
Preset clearance 19 is provided between 10 arc surface；The endoporus of the valve seat 10 uses streamline channel 16, compared to blunt form
Pressure loss when valve seat 10 can not only reduce huge discharge gas injection, moreover it is possible to the scope of stable region when increasing gas injection, realizes huge discharge,
Continuous-stable injects.
In the present invention, the middle part of the nitrogen room housing 4 is provided with cylinder boss and its taper surface phase with the valve rod 6
The cylinder boss of cooperation.It is provided between the cylinder boss of the nitrogen room housing 4 and the cylinder boss of the valve rod 6 between reserving
Gap 18, also, the inside of the cylinder boss of the nitrogen room housing 4, positioned at the touching position with the taper surface of the valve rod 6,
It is provided with metal sealing 14.
In the present invention, it is respectively provided with the outer surface of the stem guiding cylinder 7 and on the outer surface of the valve seat sheath 11
There are upper seal combination 8 and lower seal combination 12, the upper seal combination 8 and lower seal combination 12 can coordinate real with side-pocket mandrel
Sealing inside existing oil jacket annular space and oil pipe, to prevent oil jacket annular space gas from entering oil pipe in advance.
Gas lift valve original state of the present invention as shown in figure 1, high-pressure bellows 5 in the raw, the cylinder boss of valve rod 6
There is preset clearance 18 (as shown in Figure 2) between cylinder boss in nitrogen room housing 4, have between valve ball 9 and valve seat 10 between reserving
Gap 19 (as shown in Figure 3).Before high pressure nitrogen is poured to gas lift valve nitrogen chamber, a certain amount of silicon is added in nitrogen chamber in advance
Oil 17, makes the annular space chamber 20 between high-pressure bellows 5 and nitrogen room housing 4 be full of silicone oil 17.Gas lift valve is gone into the well to seating nipple
The preceding nitrogen filled in nitrogen room housing 4 by Test-bed such as certain pressure, when nitrogen pressure gradually increases, is applied to height
Pressing the external pressure of bellows 5 also increases, and the active force of generation is compressed to high-pressure bellows 5 first, together with valve rod 6, valve
Ball 9 is moved down, and the no stroke of valve rod 6 can be walked after valve ball 9 is contacted with valve seat 10, it is remaining make every effort to promote valve ball 9 is close to valve seat
10, close gaslift valve base 10 and fluid inlet channel.Now, ball valve is as shown in Figure 4 with the position of valve seat 10.
When gas lift valve works, oil jacket annular air injection pressure gradually rises, gas by valve fluid intake 15 several are straight
Footpath uniformly distributed round enters in gas lift valve and acts on inside high-pressure bellows 5, and because valve ball 9 and valve seat 10 are close to, gas is acted on
Area inside high-pressure bellows 5 can act on area outside high-pressure bellows 5 less than high pressure nitrogen, due to the balance of power
Principle, will make 10 gas injection pressures of lifting off a seat of valve ball 9 be greater than nitrogen chamber nitrogen charging pressure, thus to the opening pressure of gas lift valve
Certain amplification is carried out, the ratio of active area determines the multiplication factor of pressure inside and outside high-pressure bellows 5.Gas injection pressure reaches
After certain value, pressure forces high-pressure bellows 5 to extend, and with ovable valve stem 6, valve rod 6 drives valve ball 9 to lift off a seat to high-pressure bellows 5
10 move up, and when the cylinder boss face of valve rod 6 contacts with cylinder boss in nitrogen room housing 4, the elongation of high-pressure bellows 5 is to most
Big value, now, gas lift valve is opened completely, is linked up in oil jacket annular space and oil pipe, and valve ball 9 is as shown in Figure 5 with the position of valve seat 10.High pressure
When bellows 5 is elongated to upper limit, a closed annular space chamber is formd between high-pressure bellows 5 and nitrogen room housing 4
20, silicone oil 17 is full of in chamber 20, when gas injection pressure is further raised or air pressure is unstable, act on inside high-pressure bellows 5
Power can change, but due to being surrounded by silicone oil 17 outside high-pressure bellows 5 and these silicone oil 17 are closed all at one
In chamber 20, because liquid compression is poor, silicone oil 17 produces the pressure outside high-pressure bellows 5 can be with high-pressure bellows 5
Portion's pressure increases and quickly increases, and stress equalization high-pressure bellows 5 inside and outside high-pressure bellows 5 has been obtained effective guarantor
Shield.Valve rod 6 is as shown in Figure 6 to upper limit.
Oil jacket annular space injection gas enters valve seat 10 by the valve ball 9 opened, and valve seat 10 uses streamline streamlined structure, oil
Set annular pressure produces a pressure drop after valve seat 10, and the pressure loss that the valve seat 10 is produced under equal tolerance is smaller, valve seat
Pressure is larger after 10, can thus carry out the gas injection of deeper point.Meanwhile, gas after the speed of valve seat 10 reaches critical flow velocity,
The pressure change in downstream will not produce influence to gas injection, so, the small downstream stability region of valve seat 10 of the pressure loss is bigger, makes
The trip more stable reliability of gas injection.
Claims (4)
1. a kind of high-pressure opening gas lift valve suitable for deepwater, it is characterised in that including beating for being from top to bottom sequentially connected
Drag for head, nitrogen chamber top connection, nitrogen room housing, stem guiding cylinder, valve fluid intake, valve seat sheath and one-way overflow valve；It is described
High-pressure bellows are provided with nitrogen room housing, annular compartment is formed between the high-pressure bellows and the nitrogen room housing；
Valve rod is equipped with the high-pressure bellows and in stem guiding cylinder, the upper end of the valve rod is provided with cylinder boss,
The upper surface of the high-pressure bellows is connected with the lower surface of the cylinder boss of the valve rod, the lower end of the high-pressure bellows
Face is connected with the top in stem guiding cylinder；The lower end of the valve rod is connected with the valve in the valve fluid intake
Ball, the valve seat being engaged with the valve ball is provided with the valve seat sheath.
2. the high-pressure opening gas lift valve suitable for deepwater according to claim 1, it is characterised in that in the chamber
The nitrogen of compressive state is in filled with making the high-pressure bellows be pressurized.
3. the high-pressure opening gas lift valve suitable for deepwater according to claim 1, it is characterised in that in the chamber
The silicone oil of the inside and outside impact of the helpful buffering high-pressure bellows of filling.
4. the high-pressure opening gas lift valve suitable for deepwater according to claim 1, it is characterised in that the valve seat
Endoporus uses streamline channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243903.8A CN106761603A (en) | 2016-12-29 | 2016-12-29 | A kind of high-pressure opening gas lift valve suitable for deepwater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243903.8A CN106761603A (en) | 2016-12-29 | 2016-12-29 | A kind of high-pressure opening gas lift valve suitable for deepwater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106761603A true CN106761603A (en) | 2017-05-31 |
Family
ID=58927446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611243903.8A Pending CN106761603A (en) | 2016-12-29 | 2016-12-29 | A kind of high-pressure opening gas lift valve suitable for deepwater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106761603A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701154A (en) * | 2017-10-26 | 2018-02-16 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN109209305A (en) * | 2018-11-13 | 2019-01-15 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of gas well Intelligent Plunger mining device and construction method |
| CN112127836A (en) * | 2020-09-24 | 2020-12-25 | 兰州工业学院 | Anti-overflow and blowout drilling device and method thereof |
| CN112253055A (en) * | 2020-11-27 | 2021-01-22 | 西南石油大学 | An anti-backflow gas lift valve suitable for variable pressure gas lift technology |
| CN114458253A (en) * | 2021-02-20 | 2022-05-10 | 中海油能源发展股份有限公司 | Double-corrugated-pipe ultrahigh-pressure gas lift valve with damping and application method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701154A (en) * | 2017-10-26 | 2018-02-16 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN107701154B (en) * | 2017-10-26 | 2019-10-11 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN109209305A (en) * | 2018-11-13 | 2019-01-15 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of gas well Intelligent Plunger mining device and construction method |
| CN109209305B (en) * | 2018-11-13 | 2023-10-13 | 中国石油化工股份有限公司 | Intelligent plunger drainage and production device for gas well and construction method |
| CN112127836A (en) * | 2020-09-24 | 2020-12-25 | 兰州工业学院 | Anti-overflow and blowout drilling device and method thereof |
| CN112127836B (en) * | 2020-09-24 | 2023-06-27 | 兰州工业学院 | Drilling device and method for preventing overflow and blowout |
| CN112253055A (en) * | 2020-11-27 | 2021-01-22 | 西南石油大学 | An anti-backflow gas lift valve suitable for variable pressure gas lift technology |
| CN114458253A (en) * | 2021-02-20 | 2022-05-10 | 中海油能源发展股份有限公司 | Double-corrugated-pipe ultrahigh-pressure gas lift valve with damping and application method thereof |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: CNOOC Energy Development Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Energy Development Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |