CN103525385B - Polyacrylamide strong gel for well control and preparation method thereof - Google Patents
Polyacrylamide strong gel for well control and preparation method thereof Download PDFInfo
- Publication number
- CN103525385B CN103525385B CN201310444512.2A CN201310444512A CN103525385B CN 103525385 B CN103525385 B CN 103525385B CN 201310444512 A CN201310444512 A CN 201310444512A CN 103525385 B CN103525385 B CN 103525385B
- Authority
- CN
- China
- Prior art keywords
- polyacrylamide
- strong gel
- well control
- linking agent
- gel
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of Polyacrylamide strong gel for well control and preparation method thereof, Polyacrylamide strong gel for well control is made up of following component and content: base fluid: to prepare the total solution quality of the Polyacrylamide strong gel for well control formed, 1-6% polyacrylamide, 2-8% structure toughener, the agent of 0.4-8% anti-dehydrating, 0.2-4% antioxidant, surplus is water; Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 0.2-10%.The strong gel of polyacrylamide prepared by the present invention has that intensity is large, good springiness, good toughness, adhesivity are good, compressive strength is high, to features such as gas tightness are good, direct plastic can use in the N80 pipe that oil field is special, can bond with sleeve pipe, effectively prevent gas overflowing pit shaft, play good kill-job, sealing function.
Description
Technical field
Invention relates to a kind of Polyacrylamide strong gel for well control and preparation method thereof, and this gel can be used as the kill-job material in oil well and under-balanced drilling process.
Background technology
Oilfield exploitation procedure needs drilling well, completion, workover treatment, and conventional well control fluid is easily missed, and formation injury is large.In order to solve practical site problems, oil worker bored the technology such as completion be studied Low Damage and anti-leakage well control fluid, gel leakage stopping technology, snubbing serving, underbalance in recent years, above-mentioned technology respectively has excellent, shortcoming, wherein non-snubbing service device is deposited needs plenty of time erecting equipment before use, needs the shortcoming that the plenty of time makes a trip in use procedure.And in underbalance operation, play the casing valve on protection stratum, because it is expensive and may be limited its scope applied and degree when running into hole deviation by drilling tool damage.
In prior art, it is very common that polymer gel is used for leak stopping, and that applies at present mainly contains two kinds.One is online cross-linked polymer gel, and this gel to be heated plastic in drop ply by patching materials at the formation temperature; Another kind is can water-swelling cross-linked polymer gel, and this material is mainly High hydrophilous resin.But the cross-linked polymer gel intensity directly formed is lower, pressure high-temp resistant is in the earth formation limited in one's ability, as China Patent No. " 200710175977.7 " discloses a kind of down-hole gel valve preparation method and constructional method thereof, publication date is on 03 05th, 2008, and the volume ratio of base fluid, crosslinked fluid and breaking glue solution is: 40-60%: 20-35%: 20-35%.Wherein: the starting components content of base fluid, crosslinked fluid and breaking glue solution is: A. base fluid: guanidine glue 0.5-2.5%; Sheet alkali 0.1-2%; Formaldehyde 0.2-0.6%; All the other are water.B. crosslinked fluid: borax 0.02-0.05%; All the other are water.C. breaking glue solution: hydrogen peroxide 0.001%-0.005%; All the other are water.
This gel valve is a kind of strong gelling system, well control fluid and reservoir effectively can be isolated, prevent well control fluid invaded formation, play sealing function simultaneously to sleeve pipe, prevent the gas leakage such as the hydrogen sulfide in stratum.But polymer gel intensity prepared by the method cannot meet higher reservoir pressure and the requirement of temperature, and the preparation cost of this gel is higher.
Summary of the invention
The object of the invention is to overcome the problem that kill-job polymer gel cost is high, compressive strength is limited, heat-resisting property is poor existed in prior art, a kind of Polyacrylamide strong gel for well control and preparation method thereof is provided.Strong gel prepared by the present invention has good elasticity and adhesivity, has both had certain intensity, can bond with sleeve pipe thus play good sealing function to sleeve pipe again, effectively prevent gas overflowing pit shaft.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of Polyacrylamide strong gel for well control, is characterized in that, be made up of following component and content:
Base fluid: in the total solution quality of the Polyacrylamide strong gel for well control preparing formation, 1-6% polyacrylamide, 2-8% structure toughener, the agent of 0.4-8% anti-dehydrating, 0.2-4% antioxidant, surplus is water;
Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 0.2-10%.
The viscosity of the strong gel of described polyacrylamide is greater than 100000 mPa s(1.5s
-1, 100 DEG C), compressive strength reaches 0.4-1.7MPa/10m.
Described polyacrylamide is one or more in nonionic, positively charged ion, negatively charged ion, amphoteric polyacrylamide mixtures of forming in any proportion.
The molecular weight of described polyacrylamide is between 1,000,000-1,200 ten thousand.
Described structure toughener is one or more in calcium carbonate, Z 250, aluminum oxide mixtures of forming in any proportion.
Described anti-dehydrating agent is one or more in carboxymethyl cellulose, Natvosol, hydroxypropylcellulose mixtures of forming in any proportion.
Described antioxidant is one or more in S-WAT, sodium bisulfite mixtures of forming in any proportion.
Described linking agent is one or more in resol, Tiorco 677 mixtures of forming in any proportion.
A kind of preparation method of Polyacrylamide strong gel for well control, it is characterized in that: be under the stirring velocity of 350-450 turns/min at rotating speed, polyacrylamide, antioxidant, anti-dehydrating agent and structure toughener is added successively in water, after abundant dissolving, add linking agent again, plastic at 40-120 DEG C.
Described add linking agent after, cross-linking reaction time is 4-48 hour.
Employing the invention has the advantages that:
One, the present invention is made up of following component and content, base fluid: in the total solution quality of the Polyacrylamide strong gel for well control preparing formation, 1-6% polyacrylamide, 2-8% structure toughener, the agent of 0.4-8% anti-dehydrating, 0.2-4% antioxidant, and surplus is water; Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 0.2-10%; This component and content are according to gel cross-linkage reaction mechanism, and the performance characteristics of conjugated polymer gel, by polymer materials and additive, preferably two aspects are comprehensive, the strong gel of low cost of preparation can be applied in 40-120 DEG C of Oil/gas Well, this strong gel has good elasticity and adhesivity, has both had certain intensity, can bond with sleeve pipe thus play good sealing function to sleeve pipe again, effectively prevent gas overflowing pit shaft, play good kill-job, sealing function; When constructing at the scene, the very high gel slug of one section of intensity can be formed on the top of reservoir, thus realize safety drilling, completion, kill operation; Well control fluid and reservoir can be isolated simultaneously, effectively prevent top well control fluid from entering reservoir and stop the gas effusion pit shaft in reservoir.
Two, the strong gel in the present invention has good compressive strength, toughness and the stopping property to gas, and this strong gel viscosity is greater than 100000 mPa s(1.5s
-1, 100 DEG C), compressive strength can reach 0.4MPa-1.7MPa/10m, and has very high Young's modulus and viscous modulus, and elasticity, much larger than its viscosity, is not easy tension fracture; The effect can played kill-job after forming strong gel and prevent formation gas from overflowing.
Three, in preparation method of the present invention: be under the stirring velocity of 350-450 turns/min at rotating speed, polyacrylamide is added successively in water, antioxidant, anti-dehydrating agent and structure toughener, after abundant dissolving, add linking agent again, at 40-120 DEG C, crosslinking reaction 4-48 hour plastic, if the technical parameter related to aforementioned is too high or too low, not only dissolution rate can be affected, crosslinking reaction degree and gelation time, also can affect viscosity and the compressive strength of the strong gel of formation, and involved technical parameter and to add the order of component interrelated, any one technical parameter or add component order change, capital cause the viscosity of strong gel and compressive strength undesirable.
To sum up, the strong gel of polyacrylamide in the present invention has that intensity is large, good springiness, good toughness, adhesivity are good, compressive strength is high, to features such as gas tightness are good, direct plastic can use in the N80 pipe that oil field is special, play good kill-job, sealing function.
Accompanying drawing explanation
Fig. 1 is the pressure tester structural representation of the present invention for strong gel.
Embodiment
Embodiment 1
A kind of Polyacrylamide strong gel for well control, is made up of following component and content:
Base fluid: in the total solution quality of the Polyacrylamide strong gel for well control preparing formation, 1% polyacrylamide, 8% structure toughener, 8% anti-dehydrating agent, 0.2% antioxidant, surplus is water;
Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 10%.
The viscosity of the strong gel of described polyacrylamide is greater than 100000 mPa s(1.5s
-1, 100 DEG C), compressive strength reaches 0.4-1.7MPa/10m.
In the present invention, described polyacrylamide is one or more in nonionic, positively charged ion, negatively charged ion, amphoteric polyacrylamide mixtures of forming in any proportion.
In the present invention, the molecular weight of described polyacrylamide is between 1,000,000-1,200 ten thousand.
In the present invention, described structure toughener is one or more in calcium carbonate, Z 250, aluminum oxide mixtures of forming in any proportion.
In the present invention, described anti-dehydrating agent is one or more in carboxymethyl cellulose, Natvosol, hydroxypropylcellulose mixtures of forming in any proportion.
In the present invention, described antioxidant is one or more in S-WAT, sodium bisulfite mixtures of forming in any proportion.
In the present invention, described linking agent is one or more in resol, Tiorco 677 mixtures of forming in any proportion.
A kind of preparation method of Polyacrylamide strong gel for well control, comprise: be under the stirring velocity of 350 turns/min at rotating speed, in water, add polyacrylamide, antioxidant, anti-dehydrating agent and structure toughener successively, after fully dissolving, add linking agent again, plastic at 40 DEG C.
In the present invention, described in add linking agent after, cross-linking reaction time is 48 hours.
Embodiment 2
The present embodiment and above-described embodiment are substantially identical, and the key distinction is as follows:
A kind of Polyacrylamide strong gel for well control, is made up of following component and content:
Base fluid: in the total solution quality of the Polyacrylamide strong gel for well control preparing formation, 6% polyacrylamide, 2% structure toughener, 0.4% anti-dehydrating agent, 4% antioxidant, surplus is water;
Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 0.2%.
A kind of preparation method of Polyacrylamide strong gel for well control, comprise: be under the stirring velocity of 450 turns/min at rotating speed, in water, add polyacrylamide, antioxidant, anti-dehydrating agent and structure toughener successively, after fully dissolving, add linking agent again, plastic at 120 DEG C.
In the present invention, described in add linking agent after, cross-linking reaction time is 4 hours.
Embodiment 3
The present embodiment and above-described embodiment are substantially identical, and the key distinction is as follows:
A kind of Polyacrylamide strong gel for well control, is made up of following component and content:
Base fluid: in the total solution quality of the Polyacrylamide strong gel for well control preparing formation, 3% polyacrylamide, 4% structure toughener, 4% anti-dehydrating agent, 2% antioxidant, surplus is water;
Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 6%.
A kind of preparation method of Polyacrylamide strong gel for well control, comprise: be under the stirring velocity of 400 turns/min at rotating speed, in water, add polyacrylamide, antioxidant, anti-dehydrating agent and structure toughener successively, after fully dissolving, add linking agent again, plastic at 100 DEG C.
In the present invention, described in add linking agent after, cross-linking reaction time is 5 hours.
Embodiment 4
In embodiment 4 ~ 6, water used is tap water, and the agitator of use is RW28 basic model overhead type mechanical stirrer (German IKA).
And in embodiment 4 ~ 6, the pressure tester of the N80 pipe processing all utilizing oil field general, as shown in Figure 1, the compressive strength of strong gel is by this device to test.Pressure tester comprises nitrogengas cylinder, surge tank, six-way valve, gelling vessel, temperature controlling system, temperature measurer, pressure transmitter and computer.Connection line between nitrogengas cylinder and surge tank is provided with reducing valve, and six-way valve is connected with tensimeter, surge tank and gelling vessel respectively, and gelling vessel connects temperature controlling system and temperature measurer respectively, and pressure transmitter is connected to computer.
In the present embodiment, the preparation strong gel of 8728g polyacrylamide (height in experiment N80 sleeve pipe is 70cm), by 95.15% that is 8305g tap water be added in container, under agitator speed is about 400 turns/min, successively 1.2% polyacrylamide, 0.4% antioxidant, 0.5% anti-dehydrating agent, 2.5% structure toughener are joined in container.After abundant dissolving, then add 0.25% linking agent, pour in 100 DEG C of plastics in the N80 sleeve pipe of 1m, measure its compressive strength and stopping property, compressive strength reaches 28kPa/70cm, is equivalent to 0.4MPa/10m.
The gel formula of table 1 embodiment 4 and compressive strength
Embodiment 5
The preparation strong gel of 8728g polyacrylamide (height in experiment N80 sleeve pipe is 70cm), by 94.1% that is 8213g tap water be added in container, under agitator speed is about 400 turns/min, successively 2% polyacrylamide, 0.2% antioxidant, 1% anti-dehydrating agent, 2.5% structure toughener are joined in container.After abundant dissolving, then add 0.2% linking agent, pour in 100 DEG C of plastics in the N80 sleeve pipe of 1m, measure its compressive strength and stopping property, compressive strength reaches 40kPa/70cm, is equivalent to 0.57MPa/10m.
The gel formula of table 2 embodiment 5 and compressive strength
Embodiment 6
The preparation strong gel of 8728g polyacrylamide (height in experiment N80 sleeve pipe is 70cm), by 88.6% that is 7733g tap water be added in container, under agitator speed is about 400 turns/min, successively 4% polyacrylamide, 0.2% antioxidant, 4% anti-dehydrating agent, 3% structure toughener are joined in container, after abundant dissolving, add the linking agent of 0.2%, pour in the N80 sleeve pipe of 1m in 100 DEG C of plastics, measure its compressive strength and stopping property, compressive strength reaches 119kPa/70cm, is equivalent to 1.7MPa/10m.
The gel formula of table 3 embodiment 6 and compressive strength
The strong gel of this polyacrylamide has that intensity is large, good springiness, good toughness, adhesivity are good, compressive strength is high, to features such as gas tightness are good.Therefore, good kill-job and sealing function can be played in drilling well, completion, well workover process, well control fluid and reservoir effectively can be isolated, effectively stop top well control fluid to enter reservoir, also can stop the gas effusion pit shaft in reservoir simultaneously.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.If these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. a Polyacrylamide strong gel for well control, is characterized in that, is made up of following component and content:
Base fluid: in the total solution quality of the Polyacrylamide strong gel for well control preparing formation, 1-6% polyacrylamide, 2-8% structure toughener, the agent of 0.4-8% anti-dehydrating, 0.2-4% antioxidant, surplus is water;
Linking agent: in the massfraction of linking agent relative to base fluid, linking agent accounts for 0.2-10%;
Described structure toughener is one or more in calcium carbonate, Z 250, aluminum oxide mixtures of forming in any proportion;
Described anti-dehydrating agent is one or more in carboxymethyl cellulose, Natvosol, hydroxypropylcellulose mixtures of forming in any proportion;
Described linking agent is one or more in resol, Tiorco 677 mixtures of forming in any proportion;
Described antioxidant is one or more in S-WAT, sodium bisulfite mixtures of forming in any proportion.
2. Polyacrylamide strong gel for well control according to claim 1, is characterized in that: the viscosity of the strong gel of described polyacrylamide is greater than 100000 mPa s(1.5s
-1, 100 DEG C), compressive strength reaches 0.4-1.7MPa/10m.
3. Polyacrylamide strong gel for well control according to claim 1 and 2, is characterized in that: described polyacrylamide is one or more in nonionic, positively charged ion, negatively charged ion, amphoteric polyacrylamide mixtures of forming in any proportion.
4. Polyacrylamide strong gel for well control according to claim 3, is characterized in that: the molecular weight of described polyacrylamide is between 1,000,000-1,200 ten thousand.
5. the preparation method of a kind of Polyacrylamide strong gel for well control according to claim 1, it is characterized in that: rotating speed be 350-450 turn/stirring velocity of min under, polyacrylamide, antioxidant, anti-dehydrating agent and structure toughener is added successively in water, after abundant dissolving, add linking agent, plastic at 40-120 DEG C.
6. the preparation method of a kind of Polyacrylamide strong gel for well control according to claim 5, is characterized in that: described in add linking agent after, cross-linking reaction time is 4-48 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310444512.2A CN103525385B (en) | 2013-09-26 | 2013-09-26 | Polyacrylamide strong gel for well control and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310444512.2A CN103525385B (en) | 2013-09-26 | 2013-09-26 | Polyacrylamide strong gel for well control and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103525385A CN103525385A (en) | 2014-01-22 |
| CN103525385B true CN103525385B (en) | 2015-10-21 |
Family
ID=49927746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310444512.2A Active CN103525385B (en) | 2013-09-26 | 2013-09-26 | Polyacrylamide strong gel for well control and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103525385B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178098A (en) * | 2014-08-01 | 2014-12-03 | 克拉玛依市正诚有限公司 | High-strength gel profile control and plugging agent as well as preparation method and application method thereof |
| CN104479654A (en) * | 2014-12-27 | 2015-04-01 | 陕西科技大学 | Compounded type cationic polyacrylamide profile control agent and preparation method thereof |
| CN105273699A (en) * | 2014-12-28 | 2016-01-27 | 新疆科力新技术发展有限公司 | High-temperature high-mineralization oil field gel formula system |
| CN106566491B (en) * | 2016-11-04 | 2019-07-26 | 中国石油大学(北京) | A kind of starch/Nano-meter SiO_22Plural gel and the preparation method and application thereof |
| CN106566488B (en) * | 2016-11-04 | 2019-07-26 | 中国石油大学(北京) | Kill-job polymer gel and the preparation method and application thereof |
| CN108641692B (en) * | 2018-04-23 | 2019-05-17 | 中国地质大学（北京） | A kind of phenolic resin liquid rubber plug and its application |
| CN109364418A (en) * | 2018-11-26 | 2019-02-22 | 山东科技大学 | A kind of plastigel material for preventing and treating spontaneous combustionof coal |
| CN109762540B (en) * | 2018-12-20 | 2021-05-18 | 中国石油集团川庆钻探工程有限公司 | Supermolecule plugging agent and preparation method thereof |
| CN110079286B (en) * | 2019-05-29 | 2021-07-06 | 北京探矿工程研究所 | Delayed crosslinking gel composition for plugging and preparation method thereof |
| CN110372870B (en) * | 2019-08-30 | 2021-05-18 | 陕西科技大学 | Partially hydrolyzed polyacrylamide weak gel and preparation method thereof |
| CN111116998B (en) * | 2019-12-20 | 2022-02-18 | 煤炭科学技术研究院有限公司 | Mining environment-friendly phase-change gel drilling sealing material |
| CN111171796B (en) * | 2020-01-02 | 2022-06-03 | 中国石油大学(华东) | Environment-friendly high-temperature-resistant salt-resistant calcium-modified natural polymer filtrate reducer |
| CN111410943B (en) * | 2020-03-16 | 2022-10-04 | 中国石油天然气股份有限公司 | Composite gel well killing rubber plug capable of being quickly gelatinized and weighted at high temperature and preparation method thereof |
| CN111574976A (en) * | 2020-06-28 | 2020-08-25 | 四川格瑞迪斯石油技术有限公司 | Enhanced leaking stoppage gel and preparation method thereof |
| CN114539997B (en) * | 2022-02-24 | 2023-04-21 | 大庆汇联技术开发有限公司 | Gel for low-cost, clean and solid-free well killing and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276771A (en) * | 2010-06-11 | 2011-12-14 | 长江大学 | Underground gel slug and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2784248C (en) * | 2004-12-30 | 2015-02-10 | Sun Drilling Products Corporation | Thermoset nanocomposite particles, processing for their production, and their use in oil and natural gas drilling applications |
| US8662174B2 (en) * | 2009-08-25 | 2014-03-04 | Halliburton Energy Services, Inc. | Radiation-induced thickening and radiation-induced triggering for set-on-command sealant compositions and methods of use |
-
2013
- 2013-09-26 CN CN201310444512.2A patent/CN103525385B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276771A (en) * | 2010-06-11 | 2011-12-14 | 长江大学 | Underground gel slug and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103525385A (en) | 2014-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103525385B (en) | Polyacrylamide strong gel for well control and preparation method thereof | |
| CN102191024B (en) | Curable leak-stopping agent | |
| CN102559159B (en) | High-temperature resistant phenolic resin weak gel profile control plugging agent | |
| CN102618234B (en) | High sour gas well gas testing operation operation temporary plugging agent | |
| CN103627376B (en) | Waterglass inorganic gel plugging agent and preparation and application thereof | |
| CN110079286B (en) | Delayed crosslinking gel composition for plugging and preparation method thereof | |
| CN106867485B (en) | A kind of sealing agent resistant to high temperatures, preparation method and applications | |
| CN105505350A (en) | Elastic and flexible oil well cement slurry system based on temperature sensitive shape memory polymer and preparation method thereof | |
| CN104498007B (en) | A kind of temporary blocking gel of Low Damage and preparation method for low-pressure gas well well workover | |
| CN105238370B (en) | A kind of offshore oilfield temporary stifled well-repairing work fluid of isolation and preparation method thereof | |
| CN104563952A (en) | Non-crosslinking special gel leakage stopping method | |
| CN111334264A (en) | Temporary plugging agent and preparation method thereof | |
| CN106014330A (en) | Method for increasing success rate of chemical plugging of leaking casing damage well | |
| CN109575893A (en) | Carbonate Acid Fracturing is turned to temporarily stifled fluid | |
| CN111410943A (en) | Composite gel well killing rubber plug capable of being rapidly gelatinized at high temperature and being weighted and preparation method thereof | |
| CN105778874A (en) | Downhole drilling crosslinked gel leak stopping agent and leak stopping method thereof | |
| CN106590560A (en) | Gel temporary plugging agent | |
| CN102851013A (en) | Composite super gel plugging agent for drilling | |
| CN103756658A (en) | Automatic melting temporary plugging agent composition for oil-water well acidification in oil field | |
| CN107722955A (en) | Outer seal stoppage agent of variable density pipe and preparation method thereof | |
| CN107216865B (en) | Self-diverting acidizing fluid and preparation method and application thereof | |
| CN106479462A (en) | A kind of blocking agent and preparation method thereof and oil well casing leak stopping envelope alter method | |
| CN111019619A (en) | Liquid rubber plug temporary plugging slug for shaft isolation and preparation method | |
| CN113930200B (en) | Sealing agent for treating annular space with pressure and preparation method and application thereof | |
| CN104140795A (en) | Composite plugging agent used for oil well water plugging and preparing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |