CN103509542B - Degradable elasticity temporary plugging agent and preparation method thereof - Google Patents
Degradable elasticity temporary plugging agent and preparation method thereof Download PDFInfo
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- CN103509542B CN103509542B CN201310485276.9A CN201310485276A CN103509542B CN 103509542 B CN103509542 B CN 103509542B CN 201310485276 A CN201310485276 A CN 201310485276A CN 103509542 B CN103509542 B CN 103509542B
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- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
- C08F2800/20—Copolymer characterised by the proportions of the comonomers expressed as weight or mass percentages
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- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
Abstract
The invention belongs to a kind of degradable elasticity temporary plugging agent and preparation method thereof; Be made up of the raw material of following weight part: 100 parts ~ 150 parts, degradable polymer elastomerics, 1 part ~ 3 parts, softening agent, 0.5 part ~ 2 parts, tensio-active agent and lubricant 0.5 part ~ 1.5 parts; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 2 parts ~ 5 parts, butyl acrylate 10 parts ~ 15 parts, MALEIC ANHYDRIDE 1 part ~ 3 parts, initiator 0.05 part ~ 0.15 part, solvent 6 parts ~ 12 parts and nitrogen 100 parts ~ 150 parts; There is good soft elasticity, mechanical property, the advantage of oil soluble and degradability.
Description
Technical field
The invention belongs to oil gas development technology field, be specifically related to a kind of degradable elasticity temporary plugging agent and preparation method thereof.
Background technology
At present, China's major part oil field all adopts waterflooding, but after the exploitation of oil field long-term injecting water, great changes will take place to cause oil bearing reservoir physical property, the particularly generation of Thief zone, stratum with big pore passage, make the comparatively original permeability raising of flooded strata mean permeability, current only advance along most permeable zone in the earth formation, seldom enter middle low permeability layer.Cause water drive swept volume coefficient to decline thus, waterflooding effect is deteriorated, and the rate of oil and gas recovery declines.In order to eliminate water filling harm, improve waterflood efficiency, the most frequently used technical measures inject chemical agent in water injection well, chemical agent solidifies or forms physical clogging after expanding, reduce the rate of permeation of high permeability zone, force injection water to turn to, increase the displacement of reservoir oil effect to low water cut section.
Be that chemical agent solidifies or expands and forms physical clogging and all have the following disadvantages: on the one hand, solidify or product after expanding can not reach the particle diameter identical with duct, thus cause reservoir permeability inequality or water plugging effect bad; On the other hand, to solidify or chemical agent after expanding is difficult to degraded, after water blockoff completes oil gas extraction, the residual oil layer pollution that makes of a large amount of organic or inorganic chemical agent is serious, and environmental pressure increases the weight of; Finally, chemical agent in the past solidify or after expanding oil soluble not good, cause the significantly decline of zone permeability after having constructed, so that a large amount of minimizings of later stage recverable oil gas reservoir.
Summary of the invention
The object of the invention is to overcome defect of the prior art, and a kind of have good soft elasticity, mechanical property, oil soluble and degradability are provided, large rate of permeation gap can be squeezed into, cause injecting the turning to of water, after construct can under ground environment the degradable elasticity temporary plugging agent and preparation method thereof of energy natural degradation.
The object of the present invention is achieved like this: it is made up of the raw material of following weight part: 100 parts ~ 150 parts, degradable polymer elastomerics, 1 part ~ 3 parts, softening agent, 0.5 part ~ 2 parts, tensio-active agent and lubricant 0.5 part ~ 1.5 parts, described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 2 parts ~ 5 parts, butyl acrylate 10 parts ~ 15 parts, MALEIC ANHYDRIDE 1 part ~ 3 parts, initiator 0.05 part ~ 0.15 part, solvent 6 parts ~ 12 parts and nitrogen 100 parts ~ 150 parts, described softening agent is triethyl citrate, any one in acetyl triethyl citrate or tributyl citrate, described tensio-active agent is sodium laurylsulfonate, any one in sodium lauryl sulphate or Sodium dodecylbenzene sulfonate, described lubricant is oleic acid ester, described initiator is any one in benzoyl peroxide or Diisopropyl azodicarboxylate, described solvent is Virahol, any one in propyl carbinol and isopropylcarbinol.
A kind of preparation method of degradable elasticity temporary plugging agent comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 70 DEG C ~ 75 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 100 DEG C ~ 150 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 60 DEG C ~ 80 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
The present invention, owing to having good soft elasticity, mechanical property, the advantage of oil soluble and degradability, therefore applies enough pressure to it, and it can be made to clamp-on large rate of permeation gap, causes injecting turning to of water; Along with oil gas ground extraction, the present invention can be dissolved in oil, can not affect oil gas extraction, and after construction completes, failing to dissolve the present invention completely can natural degradation under ground environment, thus avoids polluted reservoir and increase the weight of the problem of environmental pressure.
Embodiment
The present invention is degradable elasticity temporary plugging agent and preparation method thereof, is now further described the present invention in conjunction with specific embodiments.Concrete embodiment is as follows:
Embodiment 1
The present invention is made up of the raw material of following weight part: 113 parts, degradable polymer elastomerics, 3 parts, softening agent, 0.7 part, tensio-active agent, lubricant 1.4 parts, vinyl starch 2 parts, butyl acrylate 14 parts, MALEIC ANHYDRIDE 1 part, initiator 0.11 part, solvent 7 parts and nitrogen 134 parts; Described softening agent is tributyl citrate, and tensio-active agent is sodium lauryl sulphate, and lubricant is oleic acid ester, and initiator is benzoyl peroxide, and solvent is isopropylcarbinol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 71 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 103 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 62 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
Embodiment 2
The present invention is made up of the raw material of following weight part: 144 parts, degradable polymer elastomerics, 1 part, softening agent, 1.8 parts, tensio-active agent and lubricant 1.3 parts; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 5 parts, butyl acrylate 11 parts, MALEIC ANHYDRIDE 3 parts, initiator 0.06 part, solvent 11 parts and nitrogen 100 parts, described softening agent is triethyl citrate, described tensio-active agent is Sodium dodecylbenzene sulfonate, described lubricant is oleic acid ester, described initiator is any one in Diisopropyl azodicarboxylate, and described solvent is Virahol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 75 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 149 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 78 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
Embodiment 3
The present invention is made up of the raw material of following weight part: 120 parts, degradable polymer elastomerics, 2 parts, softening agent, 1.5 parts, tensio-active agent and lubricant 0.8 part; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 4 parts, butyl acrylate 15 parts, MALEIC ANHYDRIDE 1.5 parts, initiator 0.1 part, solvent 10 parts and nitrogen 146 parts, described softening agent is triethyl citrate, described tensio-active agent is sodium laurylsulfonate, described lubricant is oleic acid ester, described initiator is benzoyl peroxide, and described solvent is propyl carbinol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 74 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 127 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 73 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
Embodiment 4
The present invention is made up of the raw material of following weight part: 100 parts, degradable polymer elastomerics, 1 part, softening agent, 0.5 part, tensio-active agent and lubricant 0.5 part; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 2 parts, butyl acrylate 10 parts, MALEIC ANHYDRIDE 1 part, initiator 0.05 part, solvent 6 parts and nitrogen 100 parts, described softening agent is triethyl citrate, described tensio-active agent is sodium laurylsulfonate, described lubricant is oleic acid ester, described initiator is benzoyl peroxide, and described solvent is Virahol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 70 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 100 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 60 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
Embodiment 5
The present invention is made up of the raw material of following weight part: 125 parts, degradable polymer elastomerics, 2 parts, softening agent, 1.25 parts, tensio-active agent and lubricant 1 part; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 3.5 parts, butyl acrylate 12.5 parts, MALEIC ANHYDRIDE 2 parts, initiator 0.1 part, solvent 9 parts and nitrogen 125 parts, described softening agent is acetyl triethyl citrate, described tensio-active agent is sodium lauryl sulphate, described lubricant is oleic acid ester, described initiator is in Diisopropyl azodicarboxylate, and described solvent is propyl carbinol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 72.5 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 125 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 70 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
Embodiment 6
The present invention is made up of the raw material of following weight part: 150 parts, degradable polymer elastomerics, 3 parts, softening agent, 2 parts, tensio-active agent and lubricant 1.5 parts; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 5 parts, butyl acrylate 15 parts, MALEIC ANHYDRIDE 3 parts, initiator 0.15 part, solvent 12 parts and nitrogen 150 parts, described softening agent is tributyl citrate, described tensio-active agent is Sodium dodecylbenzene sulfonate, described lubricant is oleic acid ester, described initiator is benzoyl peroxide, and described solvent is isopropylcarbinol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 75 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 150 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 80 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
Above embodiment only in order to explain technical solution of the present invention, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art should be appreciated that it still can be modified to the technical scheme described in aforementioned each example, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a degradable elasticity temporary plugging agent, is characterized in that: it is made up of the raw material of following weight part: 100 parts ~ 150 parts, degradable polymer elastomerics, 1 part ~ 3 parts, softening agent, 0.5 part ~ 2 parts, tensio-active agent and lubricant 0.5 part ~ 1.5 parts, described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 2 parts ~ 5 parts, butyl acrylate 10 parts ~ 15 parts, MALEIC ANHYDRIDE 1 part ~ 3 parts, initiator 0.05 part ~ 0.15 part, solvent 6 parts ~ 12 parts and nitrogen 100 parts ~ 150 parts, described softening agent is triethyl citrate, any one in acetyl triethyl citrate or tributyl citrate, described tensio-active agent is sodium laurylsulfonate, any one in sodium lauryl sulphate or Sodium dodecylbenzene sulfonate, described lubricant is oleic acid ester, described initiator is any one in benzoyl peroxide or Diisopropyl azodicarboxylate, described solvent is Virahol, any one in propyl carbinol and isopropylcarbinol.
2. the preparation method of a kind of degradable elasticity temporary plugging agent according to claim 1, is characterized in that: its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 70 DEG C ~ 75 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 100 DEG C ~ 150 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 60 DEG C ~ 80 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
3. degradable elasticity temporary plugging agent according to claim 1, it is characterized in that: this described degradable elasticity temporary plugging agent is made up of the raw material of following weight part: 113 parts, degradable polymer elastomerics, 3 parts, softening agent, 0.7 part, tensio-active agent, lubricant 1.4 parts, vinyl starch 2 parts, butyl acrylate 14 parts, MALEIC ANHYDRIDE 1 part, initiator 0.11 part, solvent 7 parts and nitrogen 134 parts; Described softening agent is tributyl citrate, and tensio-active agent is sodium lauryl sulphate, and lubricant is oleic acid ester, and initiator is benzoyl peroxide, and solvent is isopropylcarbinol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 71 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 103 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 62 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
4. degradable elasticity temporary plugging agent according to claim 1, it is characterized in that: this described degradable elasticity temporary plugging agent is made up of the raw material of following weight part: 144 parts, degradable polymer elastomerics, 1 part, softening agent, 1.8 parts, tensio-active agent and lubricant 1.3 parts; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 5 parts, butyl acrylate 11 parts, MALEIC ANHYDRIDE 3 parts, initiator 0.06 part, solvent 11 parts and nitrogen 100 parts, described softening agent is triethyl citrate, described tensio-active agent is Sodium dodecylbenzene sulfonate, described lubricant is oleic acid ester, described initiator is any one in Diisopropyl azodicarboxylate, and described solvent is Virahol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 75 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 149 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 78 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
5. degradable elasticity temporary plugging agent according to claim 1, it is characterized in that: this described degradable elasticity temporary plugging agent is made up of the raw material of following weight part: 120 parts, degradable polymer elastomerics, 2 parts, softening agent, 1.5 parts, tensio-active agent and lubricant 0.8 part; Described degradable polymer elastomerics is made up of the raw material of following weight part: vinyl starch 4 parts, butyl acrylate 15 parts, MALEIC ANHYDRIDE 1.5 parts, initiator 0.1 part, solvent 10 parts and nitrogen 146 parts, described softening agent is triethyl citrate, described tensio-active agent is sodium laurylsulfonate, described lubricant is oleic acid ester, described initiator is benzoyl peroxide, and described solvent is propyl carbinol; Its preparation method comprises the steps:
One, by vinyl starch, butyl acrylate and MALEIC ANHYDRIDE are positioned in reactor, Homogeneous phase mixing;
Two, put into solvent in the mixture in step one after Homogeneous phase mixing to dissolve;
Three, initiator is added in the liquid after dissolving in step 2;
Four, in the reactor adding initiator in step 3, injection pressure is the nitrogen of 0.01MPa;
Five, the reactor passing into nitrogen in step 4 is placed in water-bath heated polymerizable, is heated to 74 DEG C;
When being six, 50mPa.s by heated polymerizable in step 5 to solution system viscosity, above-mentioned polymers soln is clamp-oned plastic granulator, degradable polymer elastomerics can be obtained;
Seven, by softening agent, tensio-active agent, the degradable polymer elastomerics in lubricant and step 6 is positioned over and carries out blended in high-speed mixer, and the blended time is 10 minutes;
Eight, be positioned over by the blend in step 7 in JS-II type rubber powder desulfurization Plasticator and plastify, plasticization temperature is 127 DEG C;
Nine, after the blend after plasticizing in step 8 being cooled to 73 DEG C, putting it in DY180-serial plastic forcing machine and carry out granulation.
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| CN106520092A (en) * | 2016-11-02 | 2017-03-22 | 常州市鼎升环保科技有限公司 | Preparation method of high-plugging-strength leaking-stopping agent for well drilling |
| CN107558980B (en) * | 2017-07-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN110746950B (en) * | 2019-11-04 | 2022-09-20 | 西安华企众信科技发展有限公司 | Temperature switch type temporary plugging agent and preparation method and application thereof |
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| CN102061151A (en) * | 2009-11-13 | 2011-05-18 | 中国石油化工股份有限公司 | Plugging bearing material for petroleum drilling, and preparation method and application thereof |
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| CN101314671A (en) * | 2008-07-22 | 2008-12-03 | 天津新技术产业园区北洋新技术工程有限公司 | Temperature control liquid expanded rubber and preparation method thereof |
| CN102061151A (en) * | 2009-11-13 | 2011-05-18 | 中国石油化工股份有限公司 | Plugging bearing material for petroleum drilling, and preparation method and application thereof |
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