CN110847852A - Electrochemical method for accelerating dissolution of soluble bridge plug - Google Patents
Electrochemical method for accelerating dissolution of soluble bridge plug Download PDFInfo
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- CN110847852A CN110847852A CN201911006728.4A CN201911006728A CN110847852A CN 110847852 A CN110847852 A CN 110847852A CN 201911006728 A CN201911006728 A CN 201911006728A CN 110847852 A CN110847852 A CN 110847852A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
Abstract
The invention provides an electrochemical method for accelerating dissolution of a soluble bridge plug, which comprises the following specific steps: step one, for the case that the inner wall of the sleeve is subjected to internal corrosion prevention, firstly, the thickness is 1-2m3The/min discharge capacity is 5-8m310-15% hydrochloric acid or sulfuric acid, and then 5-8m3Isolating the guanidine gum base liquid, and replacing the guanidine gum base liquid with clear water to the position of a bridge plug; for the case that the inner wall of the sleeve is not internally corroded, firstly, the thickness is 1-2m3Injecting saturated strong electrolyte solution at the displacement of/min, then pumping gas production heat-producing agent A, guanidine gum base liquid and gas production heat-producing agent B in sequence, and replacing the mixture with clear water to the position of the bridge plug. The invention utilizes the potential difference of various metals by an electrochemical method (a primary battery and an electrolytic cell), quickly dissolves the soluble ball and the soluble bridge plug by giving a certain current on the sleeve, and timely recovers the drift diameter of the shaft, thereby having important practical significance for quick production or quick next-stage fracturing construction.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to an electrochemical method for accelerating dissolution of a soluble bridge plug.
Background
In recent years, the hydraulic pumping speed drilling bridge plug volume fracturing technology is widely applied to the development of the shale gas and the compact oil in North America, and is a foreign compact reservoir horizontal well main body transformation process. The process has the characteristics of high operating efficiency, capability of realizing volume fracturing large-discharge injection, multi-cluster perforation and the like, and is widely applied to foreign shale gas reservoir and compact gas reservoir development as a novel horizontal well modification technology in recent years. In order to reduce the drilling and milling time of the bridge plug and save the milling cost, part of companies develop the bridge plug for fracturing, which is made of soluble materials. Chinese patent publication No.: CN 105950930B and CN 105385918B provide a soluble alloy bridge plug material which takes magnesium-aluminum as a main component and can be dissolved away automatically after use, thereby saving the conventional flowback and milling processes and saving the cost and the processes. In the actual construction process of an oil field, after fracturing is finished and rapid production is needed, it is found that part of the bridge plug is still not dissolved and still needs drilling and grinding treatment, and the oil taking time on the field is influenced. When special conditions such as sand blockage occur and the dissolution of the bridge plug needs to be accelerated, the restraint is often unfortunate, the bridge plug can only be waited for self dissolution, and the construction progress is influenced by waiting for 2-3 days.
In order to overcome the problems that the conventional method cannot quickly dissolve the bridge plug and waits for the bridge plug to be dissolved for too long time, so that the construction progress is influenced, the electrochemical method for accelerating the dissolution of the soluble bridge plug is provided, the electrochemical method (a primary battery and an electrolytic cell) is adopted, the potential difference of various metals is utilized, a certain current is given to a sleeve, the soluble ball and the soluble bridge plug are quickly dissolved, the drift diameter of a shaft is timely recovered, and the electrochemical method has important practical significance for quick production or quick next-stage fracturing construction.
Disclosure of Invention
When rapid production is carried out after fracturing is finished, and partial bridge plugs are not dissolved or the dissolution of the bridge plugs needs to be accelerated in other cases, the invention also provides an electrochemical method for accelerating the dissolution of the soluble bridge plugs, which comprises the following steps:
the technical scheme adopted by the invention is as follows:
an electrochemical method for accelerating the dissolution of a soluble bridge plug comprises the following specific steps: step one, for the condition that the inner wall of the sleeve is subjected to internal corrosion prevention,
firstly, the thickness is 1-2m3The/min discharge capacity is 5-8m310-15% hydrochloric acid or sulfuric acid, and then 5-8m3Isolating the guanidine gum base liquid, and replacing the guanidine gum base liquid with clear water to the position of a bridge plug;
for the case that the inner wall of the sleeve is not internally antiseptic,
firstly, the thickness is 1-2m3Injecting saturated strong electrolyte solution at a discharge rate of/min,
secondly, pumping a gas-producing and heat-producing agent A, a guanidine gum base liquid and a gas-producing and heat-producing agent B in sequence, and replacing the gas-producing and heat-producing agent A, the guanidine gum base liquid and the gas-producing and heat-producing agent B with clear water to the position of the bridge plug;
step two, 1-2m3Injecting saturated strong electrolyte solution at the discharge capacity of/min, wherein the solution amount is the volume of a shaft until the solution reaches a wellhead; connecting the cathode of a direct current power supply to the sleeve at a wellhead, inserting the anode of copper into a saturated electrolyte solution, controlling the current intensity to be 0.3-0.5A, and after lasting for at least 20min, releasing the seat seal of the soluble bridge plug, and dissolving 50-70% of the soluble bridge plug; and performing the next section of fracturing or other operations.
In the first step, the gas-producing and heat-generating agent A is prepared from the following components in a mass ratio of 15: (1-5) ammonium chloride and citric acid, wherein the mass concentration of the gas-generating and heat-generating agent A is 25-35%, and the injection amount of the gas-generating and heat-generating agent A is 3-5m3。
In the first step, the injection amount of the guanidine gum base liquid is 2-4m3。
In the step one, the gas is producedThe heat agent B is sodium nitrite with the mass concentration of 45-55 percent, and the injection amount of the gas-generating and heat-generating agent B is 3-5m3。
The saturated strong electrolyte in the first step and the second step is potassium chloride, sodium chloride or calcium chloride, the mass concentration of the saturated potassium chloride is 34.2 percent, the mass concentration of the saturated sodium chloride is 36.0 percent and the mass concentration of the saturated calcium chloride is 83.6 percent at room temperature; the injection amount of the saturated strong electrolyte is 3-5m3。
In the second step, the current intensity is 0.4A.
The invention has the beneficial effects that:
1. according to the invention, by an electrochemical method, the soluble bridge plug dissolving speed is accelerated on the premise of not increasing equipment, the operation efficiency is improved, and the purpose of rapid production after fracturing is finished is achieved.
2. The invention improves and controls the electrochemical reaction rate through chemical gas production and heat production and the concentration of electrolyte solution, and does not need special process filling.
3. When the invention is applied to acid liquor, the calculated amount is controlled through the principle of a primary battery, so that the sleeve is protected, and the anode which is used as the anode is rapidly consumed until dissolved due to higher metal activity, and the sleeve cannot be corroded.
4. The invention can achieve the effect of inhibiting the expansion of the shale after the electrolyte enters the stratum.
5. The chemical materials used in the invention are easy to obtain, and the construction process is simple.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a bridge plug dissolution test at different temperatures.
FIG. 2 is a schematic diagram of a bridge plug dissolution test for different electrolyte concentrations.
Detailed Description
Example 1:
in order to overcome the problems that the existing method cannot rapidly dissolve the bridge plug and waits for the bridge plug to be dissolved for the old time, so that the construction progress is influenced, the invention provides an electrochemical method for accelerating the dissolution of the soluble bridge plug as shown in figures 1 and 2.
An electrochemical method for accelerating the dissolution of a soluble bridge plug comprises the following specific steps: step one, for the condition that the inner wall of the sleeve is subjected to internal corrosion prevention,
firstly, the thickness is 1-2m3The/min discharge capacity is 5-8m310-15% hydrochloric acid or sulfuric acid, and then 5-8m3Isolating the guanidine gum base liquid, and replacing the guanidine gum base liquid with clear water to the position of a bridge plug;
for the case that the inner wall of the sleeve is not internally antiseptic,
firstly, the thickness is 1-2m3Injecting saturated strong electrolyte solution at a discharge rate of/min,
secondly, pumping a gas-producing and heat-producing agent A, a guanidine gum base liquid and a gas-producing and heat-producing agent B in sequence, and replacing the gas-producing and heat-producing agent A, the guanidine gum base liquid and the gas-producing and heat-producing agent B with clear water to the position of the bridge plug;
step two, 1-2m3Injecting saturated strong electrolyte solution at the discharge capacity of/min, wherein the solution amount is the volume of a shaft until the solution reaches a wellhead; connecting the cathode of a direct current power supply to the sleeve at a wellhead, inserting the anode of copper into a saturated electrolyte solution, controlling the current intensity to be 0.3-0.5A, and after lasting for at least 20min, releasing the seat seal of the soluble bridge plug, and dissolving 50-70% of the soluble bridge plug; and performing the next section of fracturing or other operations.
According to the invention, by an electrochemical method, the soluble bridge plug dissolving speed is accelerated on the premise of not increasing equipment, the operation efficiency is improved, and the purpose of rapid production after fracturing is finished is achieved.
The invention improves and controls the electrochemical reaction rate through chemical gas production and heat production and the concentration of electrolyte solution, and does not need special process filling.
When the invention is applied to acid liquor, the calculated amount is controlled through the principle of a primary battery, so that the sleeve is protected, and the anode which is used as the anode is rapidly consumed until dissolved due to higher metal activity, and the sleeve cannot be corroded.
The invention can achieve the effect of inhibiting the expansion of the shale after the electrolyte enters the stratum. The chemical materials used in the invention are easy to obtain, and the construction process is simple.
The invention utilizes the potential difference of various metals by an electrochemical method (a primary battery and an electrolytic cell), quickly dissolves the soluble ball and the soluble bridge plug by giving a certain current on the sleeve, and timely recovers the drift diameter of the shaft, thereby having important practical significance for quick production or quick next-stage fracturing construction.
The invention can generate heat through an electrochemical method and chemical gas, accelerate the dissolving speed of the soluble bridge plug on the premise of not increasing equipment, control the dissolving speed of the bridge plug through the concentration of the electrolyte solution, avoid the expansion effect of the shale, and achieve the aim of quick production after fracturing. The special process is used for filling, so that the operation efficiency is improved, the sleeve cannot be corroded, and the electrolyte can be inhibited after entering the stratum.
Example 2:
based on embodiment 1, in this embodiment, in the step one, the gas and heat generating agent a is a mixture of, by mass, 15: (1-5) ammonium chloride and citric acid, wherein the mass concentration of the gas-generating and heat-generating agent A is 25-35%, and the injection amount of the gas-generating and heat-generating agent A is 3-5m3。
In the first step, the injection amount of the guanidine gum base liquid is 2-4m3。
In the first step, the gas and heat generating agent B is sodium nitrite with the mass concentration of 45-55 percent, and the injection amount of the gas and heat generating agent B is 3-5m3。
The saturated strong electrolyte in the first step and the second step is potassium chloride, sodium chloride or calcium chloride, the mass concentration of the saturated potassium chloride is 34.2 percent, the mass concentration of the saturated sodium chloride is 36.0 percent and the mass concentration of the saturated calcium chloride is 83.6 percent at room temperature; the injection amount of the saturated strong electrolyte is 3-5m3。
In the second step, the current intensity is 0.4A.
The guanidine gum base fluid in the present invention is prior art and will not be further described in the present invention. The invention provides an electrochemical method for accelerating dissolution of a soluble bridge plug, which comprises the following specific working processes:
1. the inner wall of the sleeve is subjected to internal corrosion prevention
At 1-2m3Permin displacement injection 5m3And hydrochloric acid or sulfuric acid with the mass concentration of 10-15%, and then connecting with 5-8m3And isolating the guanidine gum base liquid, and replacing the guanidine gum base liquid with clear water to the position of the bridge plug.
The soluble bridge plug component at least comprises magnesium, aluminum, zinc, copper and rare elements. Preferably, the soluble bridge plug comprises 80% of magnesium, 8% of aluminum and 3% of zinc, and also comprises copper and rare elements, the magnesium forms a primary battery under the action of an acid electrolyte, and the sulfuric acid is dissolved in water to generate partial heat, so that the reaction rate of the primary battery can be increased, the reaction rate of the main component magnesium and the acid is accelerated, and the dissolution of the bridge plug is accelerated.
2. The inner wall of the sleeve is not subjected to internal corrosion prevention
(1) At 1-2m3Injecting saturated strong electrolyte solution 3-5m per min3，
(2) Then pumping in gas-producing and heat-producing agent A3-5 m32-4m of guanidine gum base fluid3Immediately after the heat-generating gas-producing agent B3-5 m3And replacing the bridge plug with clean water.
The strong electrolyte includes, but is not limited to: potassium chloride, sodium chloride, calcium chloride. The mass concentration of saturated potassium chloride is 34.2%, the mass concentration of saturated sodium chloride is 36.0% and the mass concentration of saturated calcium chloride is 83.6% at room temperature.
The gas-producing and heat-generating agent A is ammonium chloride and citric acid, the mass ratio is 15:1-5, and the total mass concentration is 25% -35%;
the gas-producing and heat-producing agent B is sodium nitrite with the mass concentration of 45-55 percent;
the soluble bridge plug component at least comprises magnesium, aluminum, zinc, copper and rare elements. Preferably, the soluble bridge plug comprises 80% of magnesium, 8% of aluminum, 3% of zinc, copper and rare elements, and forms a galvanic reaction in a strong electrolyte solution, the reaction temperature is increased by generating heat, the contact area between the electrolyte and an electrode in unit time is increased by stirring gas flow after gas generation, the reaction time is prolonged, and the soluble bridge plug can be rapidly electrolyzed in a short time. The soluble bridge plug forms an electrolytic cell with the sleeve under the action of an external voltage in a strong electrolyte solution, and the soluble bridge plug can be rapidly electrolyzed in a short time.
3. Electrolytic soluble bridge plug process
(1) At 1-2m3Injecting saturated strong electrolyte solution at the output volume of/min, wherein the solution amount is the volume of a shaft (calculated according to the position of a bridge plug) until the solution reaches a wellhead;
(2) at the well mouth, connecting the cathode of a direct current power supply to the sleeve, inserting the anode of copper into the electrolyte solution, controlling the current intensity at 0.3-0.5A, and after at least 20min, releasing the seat seal of the bridge plug to dissolve 50-70%.
(3) And performing the next section of fracturing or other operations.
According to the invention, by an electrochemical method, the soluble bridge plug dissolving speed is accelerated on the premise of not increasing equipment, the operation efficiency is improved, and the purpose of rapid production after fracturing is finished is achieved. The invention improves and controls the electrochemical reaction rate through chemical gas production and heat production and the concentration of electrolyte solution, and does not need special process filling.
When the invention is applied to acid liquor, the calculated amount is controlled through the principle of a primary battery, so that the sleeve is protected, and the anode which is used as the anode is rapidly consumed until dissolved due to higher metal activity, and the sleeve cannot be corroded. The invention can achieve the effect of inhibiting the expansion of the shale after the electrolyte enters the stratum. The chemical materials used in the invention are easy to obtain, and the construction process is simple.
The method utilizes the potential difference of various metals by an electrolysis method, and a certain current is given to the sleeve to quickly dissolve the soluble ball and the soluble bridge plug and timely recover the drift diameter of the shaft, thereby having important practical significance for quick production or quick next-stage fracturing construction.
Example 3:
based on the examples 1 and 2, in this example, the huah-X well needs to be put into production quickly after the soluble bridge plug staged multi-cluster volume fracturing operation is performed, and the bridge plug is still undissolved after the well is shut in for 3 days.
At 2m3Permin displacement injection 5m315% sulfuric acid, and then 5m3And isolating the guanidine gum base liquid, replacing the guanidine gum base liquid with clear water to the position of the bridge plug, dissolving the bridge plug after about 1.5 hours, discharging liquid from a well mouth, and normally discharging the liquid for production.
Example 4:
based on the examples 1 and 2, in the present example, after the H-2 well fracturing was completed for 3 days, the liquid could not be drained normally, and the bridge plug was judged to be dissolved.
(1) At 1m3Injecting saturated potassium chloride solution 3m per minute3，
(2) Then pumping in gas-producing and heat-producing agent A3 m32m guar gum spacer fluid3Immediately after the heat-generating gas-producing agent B3 m3And replacing the bridge plug with clean water.
The gas-producing and heat-generating agent A is ammonium chloride and citric acid, the mass ratio is 15:1, and the total mass concentration is 25% to 1;
the gas-producing and heat-producing agent B is sodium nitrite with the mass concentration of 45%.
After the process is finished and the well is closed for reaction for 2.5 hours, the well is opened, and liquid can be normally discharged for production.
Example 5:
based on the examples 1 and 2, in the present example, after 5 days from the end of the fracturing of the Ningh-2 well, the liquid cannot be drained normally, and the bridge plug is judged to be dissolved.
(1) At 2m3Injecting saturated calcium chloride solution 3m per min3，
(2) Then pumping in gas-producing and heat-producing agent A3 m32m guar gum spacer fluid3Immediately after the heat-generating gas-producing agent B3 m3And replacing the bridge plug with clean water.
The gas-producing and heat-generating agent A is ammonium chloride and citric acid, the mass ratio is 15:5, and the total mass concentration is 35%;
the gas-producing and heat-producing agent B is sodium nitrite, and the mass concentration is 55%.
After the process is finished and the well is closed and reacts for 1.5 hours, the well is opened, and liquid can be normally drained for production.
Example 6:
based on examples 1 and 2, in the present example, after 5 days of Wu H-2 well fracturing, the liquid cannot be drained normally, and the bridge plug is judged to be dissolved.
(1) At 1m3Injecting saturated strong electrolyte solution into the well with a volume of 32m per min3Until the solution reaches the wellhead;
(2) at the well mouth, the cathode of a direct current power supply is connected to the sleeve, the anode of copper is inserted into the electrolyte solution, the current intensity is controlled to be 1A, and most of the bridge plug is dissolved after the duration of 20 min. And the well can be opened to normally drain liquid for production.
Example 6:
based on the embodiments 1 and 2, in the embodiment, after the yellow H-X well is subjected to soluble bridge plug segmented multi-cluster volume fracturing operation, the yellow H-X well needs to be put into production quickly, and after the well is shut in for 2 days, the bridge plug is still undissolved.
At 1m3Permin displacement injection 5m310% hydrochloric acid, and then 5m3And isolating the guanidine gum base liquid, replacing the guanidine gum base liquid with clear water to the position of the bridge plug, dissolving the bridge plug after about 2 hours, discharging the liquid from the well mouth, and normally discharging the liquid for production.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention. The processes and additives described in detail in the present invention are prior art and will not be further described in the present invention.
Claims (6)
1. An electrochemical method for accelerating the dissolution of a soluble bridge plug, comprising: the method comprises the following specific steps: step one, for the condition that the inner wall of the sleeve is subjected to internal corrosion prevention,
firstly, the thickness is 1-2m3The/min discharge capacity is 5-8m310-15% hydrochloric acid or sulfuric acid, and then 5-8m3Isolating the guanidine gum base liquid, and replacing the guanidine gum base liquid with clear water to the position of a bridge plug;
for the case that the inner wall of the sleeve is not internally antiseptic,
firstly, the thickness is 1-2m3Injecting saturated strong electrolyte solution at a discharge rate of/min,
secondly, pumping a gas-producing and heat-producing agent A, a guanidine gum base liquid and a gas-producing and heat-producing agent B in sequence, and replacing the gas-producing and heat-producing agent A, the guanidine gum base liquid and the gas-producing and heat-producing agent B with clear water to the position of the bridge plug;
step two, 1-2m3Injecting saturated strong electrolyte solution at the discharge capacity of/min, wherein the solution amount is the volume of a shaft until the solution reaches a wellhead; connecting the cathode of a direct current power supply to the sleeve at a wellhead, inserting the anode of copper into a saturated electrolyte solution, controlling the current intensity to be 0.3-0.5A, and after lasting for at least 20min, releasing the seat seal of the soluble bridge plug, and dissolving 50-70% of the soluble bridge plug; and performing the next section of fracturing or other operations.
2. An electrochemical method for accelerating the dissolution of a soluble bridge plug according to claim 1, wherein: in the first step, the gas-producing and heat-generating agent A is prepared from the following components in a mass ratio of 15: (1-5) ammonium chloride and citric acid, wherein the mass concentration of the gas-generating and heat-generating agent A is 25-35%, and the injection amount of the gas-generating and heat-generating agent A is 3-5m3。
3. An electrochemical method for accelerating the dissolution of a soluble bridge plug according to claim 1, wherein: in the first step, the injection amount of the guanidine gum base liquid is 2-4m3。
4. An electrochemical method for accelerating the dissolution of a soluble bridge plug according to claim 1, wherein: in the first step, the gas and heat generating agent B is sodium nitrite with the mass concentration of 45-55 percent, and the injection amount of the gas and heat generating agent B is 3-5m3。
5. An electrochemical method for accelerating the dissolution of a soluble bridge plug according to claim 1, wherein: the saturated strong electrolyte in the first step and the second step is potassium chloride, sodium chloride or calcium chloride, the mass concentration of the saturated potassium chloride is 34.2 percent, the mass concentration of the saturated sodium chloride is 36.0 percent and the mass concentration of the saturated calcium chloride is 83.6 percent at room temperature; the injection amount of the saturated strong electrolyte is 3-5m3。
6. An electrochemical method for accelerating the dissolution of a soluble bridge plug according to claim 1, wherein: in the second step, the current intensity is 0.4A.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852393A (en) * | 2020-07-06 | 2020-10-30 | 中国石油天然气股份有限公司 | Device and method for accelerating dissolution rate of soluble metal ball seat |
| CN112345324A (en) * | 2020-11-02 | 2021-02-09 | 东北石油大学 | Preparation method of natural crack in rock core |
| CN112553680A (en) * | 2020-11-06 | 2021-03-26 | 福耀汽车铝件(福建)有限公司 | Method for stripping electrophoretic coating on surface of hanger |
| CN114085662A (en) * | 2021-11-23 | 2022-02-25 | 西安石油大学 | Preparation method and application of chemical self-heating energizing fracturing fluid suitable for low-pressure low-permeability oil and gas reservoir |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103732853A (en) * | 2011-08-05 | 2014-04-16 | 贝克休斯公司 | Method of controlling corrosion rate in downhole article, and downhole article having controlled corrosion rate |
| CN104017556A (en) * | 2014-06-26 | 2014-09-03 | 中国石油大学(华东) | Self-heating foam system, and preparation method and application thereof |
| CN104066929A (en) * | 2011-12-13 | 2014-09-24 | 贝克休斯公司 | Controlled electrolytic degradation of downhole tools |
| US20170022778A1 (en) * | 2014-04-16 | 2017-01-26 | Halliburton Energy Services, Inc. | Time-delay coating for dissolvable wellbore isolation devices |
| US20170030161A1 (en) * | 2013-05-13 | 2017-02-02 | Magnum Oil Tools International, Ltd. | Downhole plug having dissolvable metallic and dissolvable acid polymer elements |
| US20170067328A1 (en) * | 2015-09-04 | 2017-03-09 | Team Oil Tools, Lp | Downhole tool with a dissolvable component |
| US9863201B2 (en) * | 2012-06-08 | 2018-01-09 | Halliburton Energy Services, Inc. | Isolation device containing a dissolvable anode and electrolytic compound |
| US20180252063A1 (en) * | 2017-03-01 | 2018-09-06 | Baker Hughes Incorporated | Downhole tools and methods of controllably disintegrating the tools |
| CN109763127A (en) * | 2018-08-31 | 2019-05-17 | 四川长宁天然气开发有限责任公司 | A kind of solvable bridge plug quick lysate and preparation method thereof |
| CN209040808U (en) * | 2018-11-20 | 2019-06-28 | 苗在朝 | Water injection well impressed current method prevents tube inner wall corrosion device |
| CN209228337U (en) * | 2017-11-09 | 2019-08-09 | 成都维泰油气能源技术有限公司 | A kind of dissolvable bridge plug |
-
2019
- 2019-10-22 CN CN201911006728.4A patent/CN110847852B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103732853A (en) * | 2011-08-05 | 2014-04-16 | 贝克休斯公司 | Method of controlling corrosion rate in downhole article, and downhole article having controlled corrosion rate |
| CN104066929A (en) * | 2011-12-13 | 2014-09-24 | 贝克休斯公司 | Controlled electrolytic degradation of downhole tools |
| US9863201B2 (en) * | 2012-06-08 | 2018-01-09 | Halliburton Energy Services, Inc. | Isolation device containing a dissolvable anode and electrolytic compound |
| US20170030161A1 (en) * | 2013-05-13 | 2017-02-02 | Magnum Oil Tools International, Ltd. | Downhole plug having dissolvable metallic and dissolvable acid polymer elements |
| US20170022778A1 (en) * | 2014-04-16 | 2017-01-26 | Halliburton Energy Services, Inc. | Time-delay coating for dissolvable wellbore isolation devices |
| CN104017556A (en) * | 2014-06-26 | 2014-09-03 | 中国石油大学(华东) | Self-heating foam system, and preparation method and application thereof |
| US20170067328A1 (en) * | 2015-09-04 | 2017-03-09 | Team Oil Tools, Lp | Downhole tool with a dissolvable component |
| US20180252063A1 (en) * | 2017-03-01 | 2018-09-06 | Baker Hughes Incorporated | Downhole tools and methods of controllably disintegrating the tools |
| CN209228337U (en) * | 2017-11-09 | 2019-08-09 | 成都维泰油气能源技术有限公司 | A kind of dissolvable bridge plug |
| CN109763127A (en) * | 2018-08-31 | 2019-05-17 | 四川长宁天然气开发有限责任公司 | A kind of solvable bridge plug quick lysate and preparation method thereof |
| CN209040808U (en) * | 2018-11-20 | 2019-06-28 | 苗在朝 | Water injection well impressed current method prevents tube inner wall corrosion device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852393A (en) * | 2020-07-06 | 2020-10-30 | 中国石油天然气股份有限公司 | Device and method for accelerating dissolution rate of soluble metal ball seat |
| CN112345324A (en) * | 2020-11-02 | 2021-02-09 | 东北石油大学 | Preparation method of natural crack in rock core |
| CN112553680A (en) * | 2020-11-06 | 2021-03-26 | 福耀汽车铝件(福建)有限公司 | Method for stripping electrophoretic coating on surface of hanger |
| CN112553680B (en) * | 2020-11-06 | 2021-10-22 | 福耀汽车铝件(福建)有限公司 | Method for stripping electrophoretic coating on surface of hanger |
| CN114085662A (en) * | 2021-11-23 | 2022-02-25 | 西安石油大学 | Preparation method and application of chemical self-heating energizing fracturing fluid suitable for low-pressure low-permeability oil and gas reservoir |
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