CN108661601A - Water injection well chemical scale inhibition apparatus for eliminating sludge - Google Patents
Water injection well chemical scale inhibition apparatus for eliminating sludge Download PDFInfo
- Publication number
- CN108661601A CN108661601A CN201810270650.6A CN201810270650A CN108661601A CN 108661601 A CN108661601 A CN 108661601A CN 201810270650 A CN201810270650 A CN 201810270650A CN 108661601 A CN108661601 A CN 108661601A
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- Prior art keywords
- hole
- spring
- longitudinal
- container
- water injection
- Prior art date
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- 238000002347 injection Methods 0.000 title claims abstract description 95
- 239000007924 injection Substances 0.000 title claims abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 239000000126 substance Substances 0.000 title claims abstract description 30
- 230000005764 inhibitory process Effects 0.000 title claims abstract description 24
- 239000010802 sludge Substances 0.000 title claims abstract description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000007788 liquid Substances 0.000 claims abstract description 78
- 238000007667 floating Methods 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 16
- 239000004809 Teflon Substances 0.000 claims description 13
- 229920006362 Teflon® Polymers 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 9
- 230000020477 pH reduction Effects 0.000 abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 230000003628 erosive effect Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000010790 dilution Methods 0.000 description 6
- 239000012895 dilution Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 5
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002459 sustained effect Effects 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005303 weighing Methods 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Closures For Containers (AREA)
Abstract
The present invention relates to a kind of water injection well chemical scale inhibition apparatus for eliminating sludge.Its technical solution is：Reservoir inner tube and reservoir outer tube form annular housing, hydrochloric acid solution body is housed in annular housing, the middle part of the side of airtight lid for container is equipped with longitudinal hole and lateral connection hole, and longitudinal hole is connected to the liquid tube used for bottom pouring that goes out of upside, is installed in the longitudinal hole and opens piston and close spring；The middle part of the other side of the airtight lid for container is equipped with longitudinal injection hole, and hydrochloric acid liquid ecto-entad unidirectionally injects in the annular space between airtight lid for container and floating piston.Advantageous effect is：It is reacted by hydrochloric acid and the fouling of water nozzle outlet end, realizes chemical method scale removal and antiscale；Antiscale can be completed by not only leading to too small amount of hydrochloric acid in this way, will need not entirely inject liquid acidification；It in addition, the antiscaling effect due to eccentric injection mandrel is preferable, can lengthen working hours, avoid the problem that frequently stopping well operations since fouling is caused, operating cost is greatly reduced.
Description
Technical field
The present invention relates to a kind of water injection well apparatus for eliminating sludge and method, more particularly to a kind of water injection well chemical scale inhibition scale removal dress
It sets.
Background technology
In oilfield development process, oil reservoir is injected water by special water injection well, keeps or restores formation pressure, make oil
Stronger driving force is kept, to improve the exploitation rate and recovery ratio of oil reservoir.But injected at present to stratum by water injection well
Liquid is usually oil field extracted water, containing higher calcium ion and magnesium ion, with the injection of dampening, due to the increasing of temperature and pressure
Greatly, temperature is promoted to 100 degree, gradually forms calcium carbonate, magnesium carbonate, is subsequently deposited upon water injection string inner cavity and eccentric injection mandrel
It is increasingly severe at water nozzle, and with fouling condition, water nozzle can be caused finally to block, water filling cannot be normally completed, to only
It can stop well reparation, operating cost is made to increase, and reduce the effect of stratum supplement energy.
Currently, the pre- good antiscale property technology in oil field can be divided into three kinds of Physical, chemical method and Process.Physical antiscale is using super
The physical apparatus such as sound wave, magnetization, high-frequency electric field equipment inhibits the formation of dirt, and there are commonly magnetic force antiscale, these methods are implemented
The term of validity is short, and sphere of action is small.Chemical method antiscale be by be added chemical scale inhibition agent, using scale preventative complexing solubilising, dispersion,
Crystal lattice distortion effect prevents dirt from being formed, but chemical method implementation result is extremely limited, and powder performance can be with time, pH
Value, formation temperature change and change, and Process antiscale is to destroy or reduce the generation of dirt by the way that flow path conditions are modified or controlled
Probability.Traditional acidification measure is 104879105B there is also some problems, Chinese patent literature number, and patent name is《Water filling
Well is continuously injected into acidizing unit》, it is by acid solution storage tank, Hydraulic Double diaphragm metering pump, control system, acid solution pipe-line system, online
Monitoring system, truck mobile system composition, wherein acid solution storage tank is connected with Hydraulic Double diaphragm metering pump, Hydraulic Double diaphragm metering pump
Outlet is connected with acid solution pipe-line system, and control system is connected with Hydraulic Double diaphragm metering pump, on-line monitoring system and acid solution pipeline
System is connected, acid solution storage tank, the total same steel base of Hydraulic Double diaphragm metering pump and control system and truck mobile system bottom
Disk is connected.The present invention by On-line construction, realize water injection well efficiently, quickly, scale de-plugging, reduce water injection pressure, improve
Water injection rate.But itself the problem is that：First, hydrogen ion is full of in entire water injection pipe, it is easy that water injection string is aoxidized, is rotten
Erosion, second is that water filling well acidizing amount is increasing, reacidizing well increases year by year, but augmented injection effect is worse and worse, is acidified the term of validity
It is shorter and shorter.Third, stratum liquid is all acidified, keeps the oil acid content of later stage extraction higher, have shadow to the oil refining apparatus in later stage
It rings, increases the cost of oil refining.
Invention content
The purpose of the present invention provides a kind of water injection well chemical scale inhibition scale removal aiming at drawbacks described above of the existing technology
Device when fouling occurs in the water nozzle of eccentric injection mandrel, at this moment releases hydrochloric acid by installing antiscaling and descaling device in underground,
It is chemically reacted with dirt, eliminates dirt, to realize antiscale and scale removal.
A kind of water injection well chemical scale inhibition apparatus for eliminating sludge that the present invention mentions, technical solution are：Including lower baffle ring（3）, bullet
Spring limiter（4）, energy-storaging spring（6）, reservoir inner tube（7）, reservoir outer tube（8）, floating piston（9）, hydrochloric acid liquid（10）、
Diffuser in transverse direction（11）, outgoing liquid pipe（12）, open piston（13）, close spring（14）, go out liquid tube used for bottom pouring（15）, container it is close
Capping（16）, spring supporting cap（17）, liquid inject spring（18）, teflon seal ball（19）, water injection string（20）, protect
Sheath（21）, the reservoir inner tube（7）With reservoir outer tube（8）Annular housing is formed, hydrochloric acid solution is housed in annular housing
Body（10）, the bottom of the annular housing passes through lower baffle ring（3）Spring retainer is installed（4）, energy-storaging spring（6）Lower end be sitting in
Spring retainer（4）Top, upper end connect floating piston（9）, installed and held by upper baffle ring at the top of the annular housing
Device sealing cover（16）, the airtight lid for container（16）The middle part of side be equipped with longitudinal hole and lateral connection hole, and it is longitudinal logical
Hole and upside go out liquid tube used for bottom pouring（15）Piston is opened in connection, the interior installation of the longitudinal hole（13）With closing spring（14）, horizontal
The diffuser into connecting hole installation transverse direction（11）With outgoing liquid pipe（12）, and by reservoir inner tube（7）, reservoir outer tube（8）
And central tube（5）Cross connection, by opening piston（13）With closing spring（14）Cooperation, makes unlatching piston（13）Control is laterally
Interior diffuser（11）, outgoing liquid pipe（12）And the connection and cut-off of upper opening and longitudinal hole；
The airtight lid for container（16）The middle part of the other side be equipped with longitudinal injection hole, and spring supporting is installed in longitudinal injection hole
Cap（17）, liquid inject spring（18）, teflon seal ball（19）, form check valve, hydrochloric acid liquid（10）Ecto-entad
Unidirectional injection airtight lid for container（16）With floating piston（9）Between annular space in.
Preferably, above-mentioned reservoir outer tube（8）Outside be equipped with columnar protective case（21）.
Preferably, above-mentioned unlatching piston（13）Include upper end（13.1）, lower end（13.2）And intermediate
（13.3）, the upper end（13.1）Diameter be more than lower end（13.2）Diameter, intermediate（13.3）Outer diameter be less than under
End（13.2）Outer diameter；The upper end（13.1）It is equipped with seal groove（13.4）.
Preferably, above-mentioned to go out liquid tube used for bottom pouring（15）It is installed in airtight lid for container（16）Upside, and go out liquid tube used for bottom pouring
（15）Connect airtight lid for container（16）And central tube（5）, by central tube（5）Inner cavity and airtight lid for container（16）Longitudinal hole
Connection.
Preferably, the lower end of above-mentioned longitudinal hole is pyramidal structure, closes spring（14）Bottom be sitting in longitudinal hole
At the pyramidal structure of lower end, top and unlatching piston（13）Upper end（13.1）Lower edge contact.
Preferably, above-mentioned airtight lid for container（16）Including upper cover body（16.1）, lower main body（16.2）, longitudinal hole
（16.3）, pyramidal structure（16.4）, lateral connection hole（16.5）, upper opening（16.6）, longitudinal injection hole（16.7）, the upper cover
Body（16.1）With lower main body（16.2）The structure that group circularizes, upper cover body（16.1）Internal diameter be less than lower main body（16.2）It is interior
Diameter, outer diameter are more than lower main body（16.2）Outer diameter, make upper cover body（16.1）Lower edge be sitting in the top of reservoir inner tube；It is described
Upper cover body（16.1）Side be equipped with longitudinal hole up and down（16.3）, and longitudinal hole（16.3）The internal diameter of lower part contracts
It is small, longitudinal hole（16.3）Top side and longitudinal injection hole（16.7）Connection, lower part and lateral connection hole（16.5）Connection；
The upper cover body（16.1）The other side be equipped with longitudinal injection hole up and down（16.7）, the longitudinal direction injection hole
（16.7）Middle part be equipped with necking down.
Preferably, above-mentioned upper cover body（16.1）Necking down on the downside of be taper surface, taper surface and teflon seal ball
（19）Cooperation contact, teflon seal ball（19）Spring is injected by liquid（18）With spring supporting cap（17）Connection.
Preferably, above-mentioned lower main body（16.2）It is equipped with multiple seal grooves.
Preferably, above-mentioned spring retainer（4）, reservoir inner tube（7）, reservoir outer tube（8）Using PVC material system
At.
Preferably, above-mentioned unlatching piston（13）, floating piston（9）, airtight lid for container（16）, diffuser in transverse direction
（11）, outgoing liquid pipe（12）, go out liquid tube used for bottom pouring（15）, teflon seal ball（19）Polytetrafluoroethylene (PTFE) is respectively adopted to be made.
The beneficial effects of the invention are as follows：The present invention is anti-in the top of the eccentric injection mandrel of the central tube of underground installation chemistry
Dirty apparatus for eliminating sludge, when fouling occurs in the water nozzle of eccentric injection mandrel, the pressure in central tube will increase, when pressure is increased above
When closing the pressure of spring, liquid makes unlatching piston by interior diffuser, goes out by going out liquid tube used for bottom pouring and making unlatching descent of piston
Liquid pipe and the upper opening of reservoir are opened, and form the access of liquid flowing, wherein the hydrochloric acid in reservoir flows upwardly into reservoir
Annular space between casing, and flow at the water nozzle of eccentric injection mandrel of lower part, to make the hydrochloric acid after dilution be exported with water nozzle
The fouling at end persistently reacts, in addition, the hydrochloric acid after dilution can also diffuse at the water nozzle of eccentric injection mandrel, to water
The fouling of mouth arrival end persistently reacts, and realizes the inside and outside sustained response of water nozzle, is reduced until the fouling at water nozzle is reacted,
In water nozzle and central tube to realize eccentric injection mandrel and the scale removal and antiscale of cannula cavity, realize chemical method scale removal and
Antiscale；Antiscale can be completed by not only leading to too small amount of hydrochloric acid in this way, will need not entirely inject liquid acidification；In addition, due to
The antiscaling effect of eccentric injection mandrel is preferable, can lengthen working hours, and avoids the problem that frequently stopping well since fouling is caused makees
Operating cost is greatly reduced in industry.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the present invention；
Attached drawing 2 is the structural schematic diagram for opening piston；
Attached drawing 3 is the structural schematic diagram of airtight lid for container；
In upper figure：Casing 1, injection well downhole flow regulator 2, lower baffle ring 3, spring retainer 4, central tube 5, energy-storaging spring 6, reservoir inner tube 7, storage
Diffuser 11 in storage outer tube 8, floating piston 9, hydrochloric acid liquid or HCL gases 10, transverse direction, outgoing liquid pipe 12, open piston 13,
Close that spring 14, to go out liquid tube used for bottom pouring 15, airtight lid for container 16, spring supporting cap 17, liquid injection spring 18, polytetrafluoroethylene (PTFE) close
Blocking 19, water injection string 20, protective case 21, upper packer 22, lower packet 23, blind plugging 24；Upper end 13.1, lower end
13.2, intermediate 13.3, seal groove 13.4, upper cover body 16.1, lower main body 16.2, longitudinal hole 16.3, pyramidal structure 16.4, cross
To connecting hole 16.5, upper opening 16.6, longitudinal injection hole 16.7.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
A kind of water injection well chemical scale inhibition apparatus for eliminating sludge that the present invention mentions, technical solution are：Including lower baffle ring 3, spring
Limiter 4, energy-storaging spring 6, reservoir inner tube 7, reservoir outer tube 8, floating piston 9, hydrochloric acid liquid 10, diffuser in transverse direction
11, go out liquid pipe 12, open piston 13, close spring 14, go out liquid tube used for bottom pouring 15, airtight lid for container 16, spring supporting cap 17, liquid
Body injects spring 18, teflon seal ball 19, water injection string 20, protective case 21, the reservoir inner tube 7 and reservoir
Outer tube 8 forms annular housing, hydrochloric acid solution body 10 is housed in annular housing, the bottom of the annular housing is installed by lower baffle ring 3
Spring retainer 4, the lower end of energy-storaging spring 6 are sitting in the top of spring retainer 4, and upper end connects floating piston 9, in the annular
Airtight lid for container 16 is installed in the top of cavity by upper baffle ring, and the middle part of the side of the airtight lid for container 16 is equipped with longitudinal hole
With lateral connection hole, and longitudinal hole is connected to the liquid tube used for bottom pouring 15 that goes out of upside, in the longitudinal hole installation open piston 13
With close spring 14, lateral connection hole install transverse direction in diffuser 11 and outgoing liquid pipe 12, and by reservoir inner tube 7, storage
5 cross connection of device outer tube 8 and central tube is coordinated with spring 14 is closed by opening piston 13, unlatching piston 13 is made to control transverse direction
The connection and cut-off of interior diffuser 11, outgoing liquid pipe 12 and upper opening and longitudinal hole；
Wherein, the middle part of the other side of airtight lid for container 16 is equipped with longitudinal injection hole, and installs spring supporting in longitudinal injection hole
Cap 17, liquid injection spring 18, teflon seal ball 19, form check valve, 10 ecto-entad of hydrochloric acid liquid unidirectionally injects
In annular space between airtight lid for container 16 and floating piston 9；The outside of reservoir outer tube 8 is equipped with columnar protective case 21, should
Protective case is made of metal material, is increased voltage endurance capability, and the inside and outside of protective case is equipped with erosion resistant coating, is reduced hydrochloric acid to it
Corrosiveness.
With reference to attached drawing 2, unlatching piston 13 of the invention includes upper end 13.1, lower end 13.2 and intermediate 13.3,
The diameter of the upper end 13.1 is more than the diameter of lower end 13.2, and the outer diameter of intermediate 13.3 is less than the outer of lower end 13.2
Diameter；The upper end 13.1 is equipped with seal groove 13.4, by lower end 13.2 come upper opening, the transverse direction of control container sealing cover
The open and close of interior diffuser 11 and outgoing liquid pipe 12, when the pressure in central tube is more than the pressure of closing spring, center
The water filling of pipe squeezes upper end 13.1 by going out liquid tube used for bottom pouring 15, and upper end 13.1 is pushed to move down, and then drives lower end
First 13.2 move down, until lower end is inserted into hydrochloric acid container inner cavity, since the outer diameter of intermediate 13.3 is small, so, hydrochloric acid can
Smoothly to be flowed out from upper opening.
In addition, going out liquid tube used for bottom pouring 15 is installed in the upside of airtight lid for container 16, and goes out liquid tube used for bottom pouring 15 and connect container sealing
The inner cavity of central tube 5 is connected to by lid 16 and central tube 5 with the longitudinal hole of airtight lid for container 16.
Furthermore the lower end of longitudinal hole is pyramidal structure, and the bottom for closing spring 14 is sitting in the taper of longitudinal hole lower end
At structure, top is contacted with the lower edge for the upper end 13.1 for opening piston 13.
With reference to attached drawing 3, the airtight lid for container 16 that the present invention mentions includes upper cover body 16.1, lower main body 16.2, longitudinal hole
16.3, pyramidal structure 16.4, lateral connection hole 16.5, upper opening 16.6, longitudinal injection hole 16.7, the upper cover body 16.1 is under
16.2 groups of structures circularized of main body, the internal diameter of upper cover body 16.1 are less than the internal diameter of lower main body 16.2, and outer diameter is more than lower main body
16.2 outer diameter makes the lower edge of upper cover body 16.1 be sitting in the top of reservoir inner tube；The side of the upper cover body 16.1 is equipped with
Longitudinal hole 16.3 up and down, and 16.3 lower part of longitudinal hole internal diameter reduce, the top side of longitudinal hole 16.3 with
Longitudinal injection hole 16.7 is connected to, and lower part is connected to lateral connection hole 16.5, and the stream of hydrochloric acid may be implemented in the airtight lid for container of this side
Go out to use；
The other side of the upper cover body 16.1 is equipped with longitudinal injection hole 16.7 up and down, in the longitudinal direction injection hole 16.7
Portion is equipped with necking down, in this way, realizing the injection of concentrated hydrochloric acid by this side, is convenient for commercial Application；On the downside of the necking down of upper cover body 16.1
For taper surface, taper surface is contacted with the cooperation of teflon seal ball 19, and teflon seal ball 19 injects bullet by liquid
Spring 18 is connect with spring supporting cap 17, is formed check valve principle, can be made concentrated hydrochloric acid that can only be injected by this side, and cannot
Leakage.
In addition, lower main body 16.2 is equipped with multiple seal grooves, lower main body 16.2 and storage can be made by the way that gasket is added
Good seal between device inner tube 7, reservoir outer tube 8, avoids leakage.
It should be noted that：Spring retainer 4, reservoir inner tube 7, reservoir outer tube 8 are made of PVC material；It opens
It opens piston 13, floating piston 9, airtight lid for container 16, diffuser 11 in transverse direction, outgoing liquid pipe 12, go out liquid tube used for bottom pouring 15, polytetrafluoro
Ethylene ball sealer 19 is respectively adopted polytetrafluoroethylene (PTFE) and is made.
The application method for the water injection well chemical scale inhibition apparatus for eliminating sludge that the present invention mentions, includes the following steps：
The upper end of chemical scale inhibition apparatus for eliminating sludge is connected water injection string 20 by 1, assembling chemical antiscaling and descaling device, and chemical scale inhibition removes
The lower end of dirty device is connected with eccentric injection mandrel, and by upper packer and lower packet by the ring between water injection string and casing
Space division separates, and water filling layer is made to be separated with other layers；
2, when injecting oil field reinjection water by water injection string 20 from well head, oil field reinjection water passes through 20 injection well of water injection string
Under, and be sprayed onto in the annular space between central tube 5 and casing 1 by water injection string inner cavity by the water nozzle of eccentric injection mandrel, and pass through
The perforation of casing 1 enters stratum, realizes the water filling on stratum, improves the pressure on stratum, at this point, chemical scale inhibition apparatus for eliminating sludge be in etc.
Wait for working condition；
3, in the re-injection process of oil field reinjection water, well head water injection pressure is 5-15 megapascal, since the temperature of oil field reinjection water is low,
And calcium ion and magnesium ion content are more, when oil field reinjection water passes through the water nozzle of eccentric injection mandrel, since the through-hole of water nozzle is straight
Diameter is small, generally at 3-5 millimeters, is easy fouling, the pressure between the fluid pressure and exocoel of water injection string inner cavity can be caused after fouling
Force difference increases, and water filling access is hindered, and the pressure of water injection string inner cavity becomes larger, when pressure difference is more than the pressure for closing spring 14,
Liquid by going out liquid tube used for bottom pouring 15 and make 13 downlink of unlatching piston, make unlatching piston 13 by interior diffuser 11, outgoing liquid pipe 12 and
The upper opening of reservoir is opened, and the access of liquid flowing is formed, wherein the accumulation of energy bullet of hydrochloric acid in reservoir in reservoir lower part
Under the action of spring 6, push 9 uplink of floating piston, make hydrochloric acid by upper opening and outgoing liquid pipe 12 flow into reservoir and casing it
Between annular space, hydrochloric acid is filled to after being mixed with liquid in the annular space between reservoir and casing, until the bias for flowing to lower part is matched
At the water nozzle of hydrophone, to make the hydrochloric acid after dilution and the fouling of water nozzle outlet end persistently react, moreover, calcium carbonate and salt
Acid chemically reacts, and produces carbon dioxide gas, which generates dirt the effect of auxiliary cleaning；In addition, due to storage
The insufficient pressure of annular space between device and casing by well-case perforating by liquid to inject stratum, and then it is flat to form a dynamic
Weighing apparatus；After dynamic equilibrium, hydrochloric acid pushes 9 uplink of floating piston under the action of energy-storaging spring 6 of reservoir lower part, keeps hydrochloric acid logical
The inner cavity that interior diffuser 11 diffuses to water injection string is crossed, the hydrochloric acid after dilution diffuses at the water nozzle of eccentric injection mandrel, to right
The fouling of water nozzle arrival end persistently reacts, and realizes the inside and outside sustained response of water nozzle, until by the passing through of dirt at water nozzle
Reaction is learned to make it dissolve；When restoring normal hydrojet work when water nozzle leads to liquid again, the pressure of the liquid inside and outside water injection string
Difference reduces, and under the action of closing spring 14, opens 13 uplink of piston, and the channel of interior diffuser 11, outgoing liquid pipe 12 is made to close,
Realize normal water filling；If water nozzle again fouling and clogging when, repeat the above steps.
The assembling process for the chemical scale inhibition apparatus for eliminating sludge that the present invention mentions, includes the following steps：
1, reservoir inner tube 7, reservoir outer tube 8, airtight lid for container 16 are covered, and passes through interior diffuser 11, outgoing liquid pipe 12
It is formed through channel, then protective case is installed, floating piston 9, accumulation of energy bullet are packed between reservoir inner tube 7 and reservoir outer tube 8
The side installation of spring 6, spring retainer 4, reservoir top opens piston 13, closes spring 14, then installs upper baffle ring and lower block
Ring 3, other side installation spring supporting cap 17, liquid injection spring 18 and the ball sealer 19 on reservoir top；
2, by the hydrochloric acid inlet of 19 upside of ball sealer, hydrochloric acid liquid is injected by reservoir inner tube and storage by hydraulic pump
At annular space between device outer tube 8, compress energy storage spring 6, the liquid storage for making hydrochloric acid be formed full of reservoir inner tube 7, reservoir outer tube 8
In container.
It is an advantage of the invention that：The present invention is removed in the top of the eccentric injection mandrel of the central tube of underground installation chemical scale inhibition
Dirty device, when fouling occurs in the water nozzle of eccentric injection mandrel, the pressure in central tube will increase, when pressure is increased above closing
When the pressure of spring, liquid makes unlatching piston by interior diffuser, outgoing liquid pipe by going out liquid tube used for bottom pouring and making unlatching descent of piston
And the upper opening of reservoir is opened, and the access of liquid flowing is formed, wherein the hydrochloric acid in reservoir flows upwardly into reservoir and set
Annular space between pipe, and flow at the water nozzle of eccentric injection mandrel of lower part, to make the hydrochloric acid after dilution and water nozzle outlet end
Fouling persistently reacts, in addition, the hydrochloric acid after dilution can also diffuse at the water nozzle of eccentric injection mandrel, to enter to water nozzle
The fouling at mouth end persistently reacts, and realizes the inside and outside sustained response of water nozzle, is reduced until the fouling at water nozzle is reacted, to
It realizes in the water nozzle and central tube of eccentric injection mandrel and the scale removal and antiscale of cannula cavity, realizes chemical method scale removal and anti-
Dirt；Antiscale can be completed by not only leading to too small amount of hydrochloric acid in this way, will need not entirely inject liquid acidification；In addition, due to inclined
The antiscaling effect of heart injection well downhole flow regulator is preferable, can lengthen working hours, and avoids the problem that frequently stopping well operations since fouling is caused,
Operating cost is greatly reduced；Also it should be noted that：Petroleum casing pipe and water injection string are generally equipped with erosion resistant coating in ectonexine,
In this way, when being chemically reacted with dirt, hydrochloric acid mainly and calcium carbonate reaction, inside and outside petroleum casing pipe and water injection string
Erosion resistant coating, also central tube also are provided with erosion resistant coating, in addition, protective case has also done erosion resistant coating, reduce corrosion of the hydrochloric acid to device
Property, moreover, after the dirt of the water nozzle of eccentric injection mandrel is dissolved, after waterflood path is unimpeded, oil field reinjection water can incite somebody to action
Hydrochloric acid in device all washes away, this part hydrochloric acid is not sufficient to cause acidification to influence on stratum, and is directly injected into acidification water phase
Than the content of acidification is very low.
Embodiment 2, difference from Example 1 of the present invention are：The reservoir inner tube 7 of the present invention, reservoir outer tube 8 and floating
In the container formed between piston 9, airtight lid for container 16, hydrogen chloride gas can also be injected, in use, hydrogen chloride gas is molten
Enter liquid, equally, can also realize the chemical reaction to dirt at water nozzle.Inject hydrogen chloride gas the advantages of be：In use, chlorine
Change hydrogen to be directly dissolved in water, the concentration of hydrochloric acid solution higher of formation, in this way, in the speed to react with dirt calcium carbonate
Degree is faster.Compared with injecting concentrated hydrochloric acid, the concentration of hydrochloric acid higher in dirt is acted on, effect is more preferable, but injects hydrogen chloride gas
Body generally requires 2 megapascal or more, and this requires protective case does thicker, voltage endurance capability is more preferable；In addition, due to hydrogen chloride gas
It is directly dissolved in water, denseer hydrochloric acid can be formed, this requires the erosion resistant coating of device does more preferable, acid-fast ability is stronger,
To meet the requirements.
The above, is only the part preferred embodiment of the present invention, and any technical person familiar with the field may profit
Equivalent technical solution is changed or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (10)
1. a kind of water injection well chemical scale inhibition apparatus for eliminating sludge, it is characterized in that：Including lower baffle ring（3）, spring retainer（4）, accumulation of energy bullet
Spring（6）, reservoir inner tube（7）, reservoir outer tube（8）, floating piston（9）, hydrochloric acid liquid（10）, diffuser in transverse direction（11）、
Outgoing liquid pipe（12）, open piston（13）, close spring（14）, go out liquid tube used for bottom pouring（15）, airtight lid for container（16）, spring supporting
Cap（17）, liquid inject spring（18）, teflon seal ball（19）, water injection string（20）, protective case（21）, the storage
Storage inner tube（7）With reservoir outer tube（8）Annular housing is formed, hydrochloric acid solution body is housed in annular housing（10）, the annular chamber
The bottom of body passes through lower baffle ring（3）Spring retainer is installed（4）, energy-storaging spring（6）Lower end be sitting in spring retainer（4）It is upper
Side, upper end connect floating piston（9）, airtight lid for container is installed by upper baffle ring at the top of the annular housing（16）, described
Airtight lid for container（16）The middle part of side be equipped with longitudinal hole and lateral connection hole, and longitudinal hole and upside go out liquid unlatching
Pipe（15）Piston is opened in connection, the interior installation of the longitudinal hole（13）With closing spring（14）, lateral connection hole is installed in transverse direction
Diffuser（11）With outgoing liquid pipe（12）, and by reservoir inner tube（7）, reservoir outer tube（8）And central tube（5）Laterally connect
It is logical, by opening piston（13）With closing spring（14）Cooperation, makes unlatching piston（13）Control diffuser in transverse direction（11）, it is outgoing
Liquid pipe（12）And the connection and cut-off of upper opening and longitudinal hole；
The airtight lid for container（16）The middle part of the other side be equipped with longitudinal injection hole, and spring supporting is installed in longitudinal injection hole
Cap（17）, liquid inject spring（18）, teflon seal ball（19）, form check valve, hydrochloric acid liquid（10）Ecto-entad
Unidirectional injection airtight lid for container（16）With floating piston（9）Between annular space in.
2. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 1, it is characterized in that：The reservoir outer tube（8）
Outside be equipped with columnar protective case（21）.
3. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 1, it is characterized in that：The unlatching piston（13）'s
Including upper end（13.1）, lower end（13.2）And intermediate（13.3）, the upper end（13.1）Diameter be more than lower end
（13.2）Diameter, intermediate（13.3）Outer diameter be less than lower end（13.2）Outer diameter；The upper end（13.1）It is equipped with
Seal groove（13.4）.
4. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 1, it is characterized in that：Described goes out liquid tube used for bottom pouring（15）
It is installed in airtight lid for container（16）Upside, and go out liquid tube used for bottom pouring（15）Connect airtight lid for container（16）And central tube（5）, will in
Heart pipe（5）Inner cavity and airtight lid for container（16）Longitudinal hole connection.
5. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 4, it is characterized in that：The lower end of the longitudinal hole
For pyramidal structure, spring is closed（14）Bottom be sitting at the pyramidal structure of longitudinal hole lower end, top with open piston（13）
Upper end（13.1）Lower edge contact.
6. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 1, it is characterized in that：The airtight lid for container（16）
Including upper cover body（16.1）, lower main body（16.2）, longitudinal hole（16.3）, pyramidal structure（16.4）, lateral connection hole（16.5）、
Upper opening（16.6）, longitudinal injection hole（16.7）, the upper cover body（16.1）With lower main body（16.2）The structure that group circularizes, on
Lid（16.1）Internal diameter be less than lower main body（16.2）Internal diameter, outer diameter be more than lower main body（16.2）Outer diameter, make upper cover body
（16.1）Lower edge be sitting in the top of reservoir inner tube；The upper cover body（16.1）To be equipped with longitudinal direction up and down logical for side
Hole（16.3）, and longitudinal hole（16.3）The internal diameter of lower part reduces, longitudinal hole（16.3）Top side and longitudinal injection hole
（16.7）Connection, lower part and lateral connection hole（16.5）Connection；
The upper cover body（16.1）The other side be equipped with longitudinal injection hole up and down（16.7）, the longitudinal direction injection hole
（16.7）Middle part be equipped with necking down.
7. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 6, it is characterized in that：The upper cover body（16.1）'s
It is taper surface, taper surface and teflon seal ball on the downside of necking down（19）Cooperation contact, teflon seal ball（19）It is logical
Cross liquid injection spring（18）With spring supporting cap（17）Connection.
8. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 6, it is characterized in that：The lower main body（16.2）On
Equipped with multiple seal grooves.
9. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 1, it is characterized in that：The spring retainer（4）、
Reservoir inner tube（7）, reservoir outer tube（8）It is made of PVC material.
10. water injection well chemical scale inhibition apparatus for eliminating sludge according to claim 1, it is characterized in that：The unlatching piston（13）、
Floating piston（9）, airtight lid for container（16）, diffuser in transverse direction（11）, outgoing liquid pipe（12）, go out liquid tube used for bottom pouring（15）, poly- four
Vinyl fluoride ball sealer（19）Polytetrafluoroethylene (PTFE) is respectively adopted to be made.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270650.6A CN108661601B (en) | 2018-03-29 | 2018-03-29 | Chemical scale-proof and scale-removing device for water injection well |
| CN202010085267.0A CN111075398A (en) | 2018-03-29 | 2018-03-29 | Descaling device for water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270650.6A CN108661601B (en) | 2018-03-29 | 2018-03-29 | Chemical scale-proof and scale-removing device for water injection well |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010085267.0A Division CN111075398A (en) | 2018-03-29 | 2018-03-29 | Descaling device for water injection well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108661601A true CN108661601A (en) | 2018-10-16 |
| CN108661601B CN108661601B (en) | 2020-07-21 |
Family
ID=63782643
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010085267.0A Withdrawn CN111075398A (en) | 2018-03-29 | 2018-03-29 | Descaling device for water injection well |
| CN201810270650.6A Active CN108661601B (en) | 2018-03-29 | 2018-03-29 | Chemical scale-proof and scale-removing device for water injection well |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010085267.0A Withdrawn CN111075398A (en) | 2018-03-29 | 2018-03-29 | Descaling device for water injection well |
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| Country | Link |
|---|---|
| CN (2) | CN111075398A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140318781A1 (en) * | 2011-12-13 | 2014-10-30 | Exxon Mobil Upstream Research Company | Completing a Well in a Reservoir |
| CN104895530A (en) * | 2015-04-15 | 2015-09-09 | 西安石油大学 | Cutting type water injection well scale cleaner |
| CN104948134A (en) * | 2015-06-30 | 2015-09-30 | 安东柏林石油科技（北京）有限公司 | Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method |
| CN206071509U (en) * | 2016-09-28 | 2017-04-05 | 睿智钢业有限公司 | A kind of de-plugging of well system |
| CN206458397U (en) * | 2016-12-26 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of packer and layered water injection process pipe column for being used to be layered |
| CN107130948A (en) * | 2017-05-17 | 2017-09-05 | 成都百联油田技术服务有限公司 | A kind of liquid injecting apparatus for water injection well |
-
2018
- 2018-03-29 CN CN202010085267.0A patent/CN111075398A/en not_active Withdrawn
- 2018-03-29 CN CN201810270650.6A patent/CN108661601B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140318781A1 (en) * | 2011-12-13 | 2014-10-30 | Exxon Mobil Upstream Research Company | Completing a Well in a Reservoir |
| CN104895530A (en) * | 2015-04-15 | 2015-09-09 | 西安石油大学 | Cutting type water injection well scale cleaner |
| CN104948134A (en) * | 2015-06-30 | 2015-09-30 | 安东柏林石油科技（北京）有限公司 | Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method |
| CN206071509U (en) * | 2016-09-28 | 2017-04-05 | 睿智钢业有限公司 | A kind of de-plugging of well system |
| CN206458397U (en) * | 2016-12-26 | 2017-09-01 | 中国石油天然气股份有限公司 | A kind of packer and layered water injection process pipe column for being used to be layered |
| CN107130948A (en) * | 2017-05-17 | 2017-09-05 | 成都百联油田技术服务有限公司 | A kind of liquid injecting apparatus for water injection well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108661601B (en) | 2020-07-21 |
| CN111075398A (en) | 2020-04-28 |
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