CN1546401A - Oilfield downhole solid anti-scaling agent and its production technology - Google Patents
Oilfield downhole solid anti-scaling agent and its production technology Download PDFInfo
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- CN1546401A CN1546401A CNA2003101159055A CN200310115905A CN1546401A CN 1546401 A CN1546401 A CN 1546401A CN A2003101159055 A CNA2003101159055 A CN A2003101159055A CN 200310115905 A CN200310115905 A CN 200310115905A CN 1546401 A CN1546401 A CN 1546401A
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- solid
- alkali metal
- antiscaling
- scaling agent
- metal salt
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Abstract
The invention relates to an oil field down-hole antiscaling agent and its preparing process which comprises, weighing silica, sodium carbonate, sodium tripolyphosphate, alkali metal salt, alumina, and tinkalite, mixing homogeneously, throwing into 1000 deg. C - 1500 deg. C sintering furnace for agglomeration, transforming the raw material from solid phase to liquid phase, and feeding into die arrangement for modeling, distressing through heat treatment by kiln, modeling to obtain the vitrified solid antiscaling product capable of dissolving slowly.
Description
Technical field:
The invention provides a kind of solid antiscaling compound for oil well and production technique, is the improvement to existing liquid state or Powdered scale inhibitor, belongs to oil-extracting well water chemical treatment method field.
Background technology:
At present, liquid state or the Powdered scale inhibitors of adopting in the down-hole oil production pipeline of oil field are given birth to dirt to prevent the oil extraction pump rotor more, and liquid or Powdered scale inhibitor technological operation is numerous and diverse, and equipment is huge, and scale inhibitor runs off more with extraction liquid, and the antiscale cost is higher, and effect is undesirable.Inventor's patent of invention (number of patent application: 00123350.5), disclose a kind of " solid antiscaling compound for oil well ", had good descaling and antiscaling effect, but its release rate, corrosion speed are not ideal enough, are respectively≤0.007g/m
2H ,≤0.016gm
2H.
Summary of the invention:
The invention provides a kind of solid antiscaling compound for oil well, overcome existing liquid state or Powdered scale inhibitor operating procedure complexity, release rate, corrosion speed are not ideal enough, the run off problem of waste of scale inhibitor.
The present invention also provides the production technique of solid antiscaling compound for oil well.
Technical solution of the present invention is as follows: be to be main carrier with silicate (SiO32-), after adding a certain proportion of sorbing material, under high temperature, atmospheric pressure state, through the sintering oven sintering, make raw material change into liquid phase by solid phase, send into in-mold molding, at the appointed time, raw material is a solid phase by liquid-phase conversion.After removing destressing through kiln thermal treatment again, be shaped to the slowly novel hollow semivitreous of dissolved solid antiscale product.
The present invention be by following raw materials by weight portion than the scale remover of making:
Silica 30～38, yellow soda ash 32～38, tripoly phosphate sodium STPP 13～18,
An alkali metal salt 10～15, aluminium sesquioxide 1～3, borax 0.5～2.
Preferred prescription of the present invention is:
Silica 30, yellow soda ash 32, tripoly phosphate sodium STPP 16, an alkali metal salt 11, aluminium sesquioxide 2, borax 1.
Described an alkali metal salt comprises: Na
2CO
3, K
2SO
4, Na
5P
3O
10, Na
2B
4O
7Deng potassium sodium metal-salt.
Production technique of the present invention is as follows:
Take by weighing each raw material according to the above ratio, mixing the back drops in 1000～1500 ℃ of High Temperature Furnaces Heating Apparatuss, fusion 6～10 hours, pour mould molding into, put into again on the annealing grinding tool and send into tunnel furnace, carried out the kiln stress relieving by annealing and handle, the time that crosses kiln is 22～38 hours, temperature slowly reduces to 420 from 460, is cooled to normal temperature at last, makes product of the present invention.
Above-mentioned cross firer's preface particularly the annealed temperature and time be key in the production technique, if annealed the product distortion big, annealing product little bursts, the invention provides optimum process condition, solved the problem of the internal stress of product, product temperature is slowly descended, make product performance stable, significantly reduced breakage rate.
Solid anti-scaling agent is with after extraction liquid contacts, slowly release the colloidal state negative ion, can adsorb calcium, magnesium ion and suspended substance in the extraction liquid, make it become colloidal particle, reduce the hardness in the water, suppress calcium, magnesium ion and suspended substance effectively and become dirt in the metallic surface, colloidal particle plays anti-scaling action by outside the current system discharge system.
This scale inhibitor has stronger avidity to the metallic surface, in the time of in slowly being dissolved in extraction liquid, form the tough and tensile molecular film (below 1 micron) of one deck at oil pump and oil recovery pipeline metallic surface, make calcium, magnesium ion and suspended substance be difficult for playing anti-scaling action once more in oil pump and tubing wall metallic surface deposition.Simultaneously this layer molecular film can prevent that again the metallic surface from contacting with negatively charged ion and dissolved oxygen in the extraction liquid, suppressed chemical corrosion and galvanic corrosion effectively.To the established dirt layer of oil pump and tube wall, this scale inhibitor is by processes such as wetting, infiltration, ion-exchange, absorption, plays dissolving, peels off dirty layer effect, reaches the effect of scale removal.
Key problem in technology of the present invention is: aluminium sesquioxide forms tetrahedron and SiO in glass
2Tetrahedron form continuity structure net, can improve heat, chemical stability, the physical strength of glass, and alleviate the erosion of glass melt fire resisting material of furnace body.The increase of aluminium sesquioxide composition has reduced the hardness in the water, has reduced to separate out the possibility of calcium, magnesium incrustation scale.Increase adsorption function (effect), release rate is slowed down, prolonged product work-ing life, fallen end corrosion speed (reached substantially and do not had corrosion), reached the purpose that prolongs pump detection period.The data of release rate, corrosion speed on the former patent have been changed.
Accurate controlled temperature and make the opportunity of feeding intake supplementary material not change effective constituent through after the high-temperature fusion.When temperature is hanged down, raw material fusion fully, product and mould adhesion can't the demouldings.The goods support dissolution rate is too fast; When temperature was high, material effective component was destroyed, the complete vitrifying of goods support and can not dissolving.
This product dispensing mode is different from all oil field antiscale products.Be that product is directly discharged in the tail sleeve pipe of oil field oil recovery pipeline, slowly directly act on oil pump and oil pipe after the dissolving, stop its fouling and corrosion.Change the consistent notes acid scale removal mode that adopts in oil field, strengthened the advance and the practicality of this product.
Below be the testing data in " Daqing oil field technology final report ",, carried out static antiscaling rate test in order to measure the antiscaling effect of solid anti-scaling agent.A factory and two factories ternary composite driving oil well extraction liquid are adopted in test, constant temperature (temperature 50 ℃～60 ℃), and time 72h, scale inhibitor concentration is: 2.50-5.00mg/L.Antiscaling rate adopts following formula to calculate:, δ=((C
2-C
1)/(C
0-C
1)) * 100%, in the formula: δ-antiscaling rate, %; C
0Incrustation ion total content in the-former water, mg/L; C
1Incrustation ion total content in the check sample behind the-constant temperature, mg/L; C
2Incrustation ion total content in the-Jia solid scale inhibitor sample, mg/L.
Test result sees Table 1.
Table 1 solid anti-scaling agent static test data sheet
| The sample label | Scale inhibitor concentration mg/L | ?C 0mg/L | ?C 1mg/L | ?C 2mg/L | Antiscaling rate (%) |
| 2-2 | ?2.5 | ?40.36 | ?32.28 | ?39.95 | ?94.90 |
| 3-2 | ?3.0 | ?40.36 | ?32.28 | ?40.00 | ?95.60 |
| 1-2 | ?3.5 | ?40.36 | ?32.28 | ?40.03 | ?95.90 |
| 4-2 | ?4.0 | ?40.36 | ?32.28 | ?40.04 | ?96.00 |
| 5-2 | ?5.0 | ?40.36 | ?32.28 | ?40.02 | ?95.80 |
Data show that when solid anti-scaling agent content was in 2.50～5mg/L scope, antiscaling rate can reach more than 95%, and antiscaling effect is better.
The scale inhibitor dynamic analog test
Test conditions is as follows:
Temperature: 45 ℃, pressure: 3.00MPa, test period: 24h.
Table 2 solid anti-scaling agent dynamic testing data sheet
| Sample | PH value changes | Total hardness changes mg/L | Descaling rate % | |||||||
| Original | One post | Two posts | Three posts | Original | Blank | One post | Two posts | Three posts | ||
| Ternary extraction liquid | 10 | ?11 | ?12 | ?13 | ?1.8 ?2 | ?1.6 ?4 | ?1.7 ?9 | ?1.7 ?9 | ?1.78 | ??????81.3 |
| Ternary extraction liquid | 10 | ?10 | ?10 | ?11 | ?1.8 ?2 | ??1.6 ??6 | ??1.8 ??0 | ??1.7 ??8 | ??1.78 | ??????79.1 |
Annotate: original liquid is for injecting the preceding ternary extraction liquid of omnipotent water-bath; Blank solution is the solution behind omnipotent water-bath internal heating 24h.
(3) rig-site utilization situation
Up to the present, have 8 mouthfuls of wells and used the downhole solid scale inhibitor, ion continuous monitoring of extraction liquid and production data show:
Solid anti-scaling agent surpasses at 10 o'clock at pH value, DeGrain.
After adding solid anti-scaling agent, calcium ions and magnesium ions concentration has rising by a relatively large margin in the extraction liquid, and the fouling situation alleviates to some extent, and solid anti-scaling agent has played certain antiscaling effect.
Wherein, respectively at Bei1-7-P127Jing and these 2 mouthfuls of wells of Nan4-20-649Jing when adding solid anti-scaling agent, all be in the serious initial stage of fouling, before the dosing, average pump detection period has only 30d; After the dosing, working current is steady, supporting technology is reliable, and production fluid amount and working fluid level are also more stable, and up to the present, northern 1-7-P127 well pump detection period 431d, the Nan4-20-649Jing 534d that run well has obtained effect preferably.
Evidence, colloidal state negative ion showed increased behind the adding aluminium sesquioxide, combine with calcium ions and magnesium ions in the solution and speed up, volume amplifies, the current density of ionic group reduced and be not absorbed, and unnecessary colloidal state negative ion with form potential difference after the metallic surface contacts and produce shallow corrosion rete, this film is tough and tensile and fine and close, insulate and heat conduction, metallic walls no longer includes corrosion current, has more effectively stoped fouling.
This shows that performance more can improve the antiscale ability behind the adding aluminium sesquioxide.
Technique effect of the present invention is: merged slow release method, semivitreous ejection technique, internal stress technology for eliminating and temperature control technology.The product antiseptic property is good, antiscaling rate is high, deenergized period is long; Nontoxic, tasteless, do not have a corrosion, environment and down-hole relevant device without any influence, are met the requirement of HSE petroleum industry fully; Stable performance, it is all very convenient to store and transport; The screw bolt well that can adapt to different displacements adapts to different oil production technology such as oil pipe and no oil pipe, also adapts to water drive, poly-driving and different displacement technology such as ternary composite driving, can satisfy on-the-spot service requirements and production needs fully.
Embodiment:
The following example is intended to further describe for example the present invention, rather than limit the present invention by any way, under the prerequisite that does not deviate from the spirit and principles in the present invention, any change or change that those of ordinary skills that the present invention did are realized easily all will fall within the claim scope that awaits the reply of the present invention.
Embodiment 1
Get silica 30kg, yellow soda ash 32kg, tripoly phosphate sodium STPP 16kg, vitriolate of tartar 11kg, aluminium sesquioxide 2kg, borax 1kg mix, drop in the High Temperature Furnaces Heating Apparatus, 1450 ℃ of high temperature heated 4 hours, poured under the molten state and cast internal diameter 25mm in the mould, outer behind the hollow pole of the normal 200mm of 73mm, put into the annealing grinding tool, anneal in tunnel furnace, controlled temperature 460 is slowly reduced to 420 ℃, anneal after 24 hours to normal temperature, make product of the present invention.
Embodiment 2
With silica 38kg, yellow soda ash 38kg, tripoly phosphate sodium STPP 18kg, Na
2CO
311kg, aluminium sesquioxide 3kg, borax 1kg mix the back and drop in 1500 ℃ of High Temperature Furnaces Heating Apparatuss, and die for molding is poured in fusing heating 6 hours into, put into the annealing grinding tool, anneal in tunnel furnace, controlled temperature 460 is slowly reduced to 420 ℃, anneal after 30 hours to normal temperature, make product of the present invention.
Embodiment 3
With silica 16kg, yellow soda ash 35kg, trimer acid sodium 16kg, Na
5P
3O
1011kg, aluminium sesquioxide 2kg, borax 1.5kg mix the back and drop in 1500 ℃ of High Temperature Furnaces Heating Apparatuss, and die for molding is poured in fusing heating 6 hours into, put into the annealing grinding tool, anneal in tunnel furnace, controlled temperature 460 is slowly reduced to 420 ℃, anneal after 38 hours to normal temperature, make product of the present invention.
Claims (4)
1, a kind of solid antiscaling compound for oil well, be by following raw materials by weight portion than the scale remover of making:
Silica 30～38, yellow soda ash 32～38, tripoly phosphate sodium STPP 13～18,
An alkali metal salt 10～15, aluminium sesquioxide 1～3, borax 0.5～2.
2, solid anti-scaling agent according to claim 1 is characterized in that being made by following raw materials by weight portion ratio:
Silica 30, yellow soda ash 32, tripoly phosphate sodium STPP 16, an alkali metal salt 11, aluminium sesquioxide 2, borax 1.
3, solid anti-scaling agent according to claim 1 and 2, it is characterized in that: an alkali metal salt comprises Na
2CO
3, K
2SO
4, Na
5P
3O
10, Na
2B
4O
7Potassium sodium metal-salt.
4, a kind of production technique of solid antiscaling compound for oil well, may further comprise the steps and finish: take by weighing each raw material according to the above ratio, mix the back and drop in 1000～1500 ℃ of High Temperature Furnaces Heating Apparatuss, mould molding is poured in fusion 3～6 hours into, put into again on the annealing grinding tool and send into tunnel furnace, carried out the kiln stress relieving by annealing and handle, the time that crosses kiln is 24～38 hours, and temperature slowly reduces to 420 from 460, be cooled to normal temperature at last, make product of the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310115905 CN1238276C (en) | 2003-12-10 | 2003-12-10 | Oilfield downhole solid anti-scaling agent and its production technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310115905 CN1238276C (en) | 2003-12-10 | 2003-12-10 | Oilfield downhole solid anti-scaling agent and its production technology |
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| Publication Number | Publication Date |
|---|---|
| CN1546401A true CN1546401A (en) | 2004-11-17 |
| CN1238276C CN1238276C (en) | 2006-01-25 |
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|---|---|---|---|
| CN 200310115905 Expired - Fee Related CN1238276C (en) | 2003-12-10 | 2003-12-10 | Oilfield downhole solid anti-scaling agent and its production technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061156A (en) * | 2010-11-22 | 2011-05-18 | 李英范 | Corrosion and scale preventing ball for oilfield production equipment and production method thereof |
| CN104386835A (en) * | 2014-11-25 | 2015-03-04 | 苏州佑君环境科技有限公司 | Anti-scaling agent for oilfield downhole and preparation method thereof |
| CN105776587A (en) * | 2016-04-27 | 2016-07-20 | 无锡锡能锅炉有限公司 | Scale remover for pulverized coal fired boiler water and preparation method of scale remover |
| CN106430644A (en) * | 2016-10-09 | 2017-02-22 | 华南理工大学 | Edible descaling agent and scale inhibition sintered carbon rod prepared from same |
| CN108368420A (en) * | 2015-12-04 | 2018-08-03 | 艺康美国股份有限公司 | Control release solid anti-scaling compound |
| CN109135701A (en) * | 2018-09-07 | 2019-01-04 | 北京华旭起源科技有限公司 | Oil field well slow-release anti-incrustation corrosion inhibitor and production technology |
-
2003
- 2003-12-10 CN CN 200310115905 patent/CN1238276C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061156A (en) * | 2010-11-22 | 2011-05-18 | 李英范 | Corrosion and scale preventing ball for oilfield production equipment and production method thereof |
| CN104386835A (en) * | 2014-11-25 | 2015-03-04 | 苏州佑君环境科技有限公司 | Anti-scaling agent for oilfield downhole and preparation method thereof |
| CN104386835B (en) * | 2014-11-25 | 2016-02-24 | 新昌县羽林街道昱泉机械厂 | A kind of oil field well scale inhibitor and preparation method thereof |
| CN108368420A (en) * | 2015-12-04 | 2018-08-03 | 艺康美国股份有限公司 | Control release solid anti-scaling compound |
| CN105776587A (en) * | 2016-04-27 | 2016-07-20 | 无锡锡能锅炉有限公司 | Scale remover for pulverized coal fired boiler water and preparation method of scale remover |
| CN106430644A (en) * | 2016-10-09 | 2017-02-22 | 华南理工大学 | Edible descaling agent and scale inhibition sintered carbon rod prepared from same |
| CN106430644B (en) * | 2016-10-09 | 2019-09-03 | 华南理工大学 | A kind of edible scale remover and scale inhibition prepared therefrom are sintered carbon-point |
| CN109135701A (en) * | 2018-09-07 | 2019-01-04 | 北京华旭起源科技有限公司 | Oil field well slow-release anti-incrustation corrosion inhibitor and production technology |
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| Publication number | Publication date |
|---|---|
| CN1238276C (en) | 2006-01-25 |
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