CN112576220A - Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method - Google Patents
Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method Download PDFInfo
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- CN112576220A CN112576220A CN202011411122.1A CN202011411122A CN112576220A CN 112576220 A CN112576220 A CN 112576220A CN 202011411122 A CN202011411122 A CN 202011411122A CN 112576220 A CN112576220 A CN 112576220A
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- bridge plug
- setting
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- drift
- soluble
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010276 construction Methods 0.000 claims abstract description 12
- 239000002195 soluble material Substances 0.000 claims abstract description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 6
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 4
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- ATTFYOXEMHAYAX-UHFFFAOYSA-N magnesium nickel Chemical compound [Mg].[Ni] ATTFYOXEMHAYAX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a large-drift-diameter expansion type fully-soluble bridge plug, a setting connection tool and a use method thereof, belongs to the technical field of downhole tools, is a brand-new bridge plug structure design, does not need traditional bridge plug structures such as slips, rubber cylinders, shear pins and the like, and is not limited by non-soluble materials any more. The large-drift-diameter expansion type fully-soluble bridge plug consists of a friction cylinder, a release ring and a setting ball, and is processed by using water-soluble magnesium-aluminum alloy; the setting and connecting tool is composed of a push cylinder, a connecting rod and a set screw. Compared with the traditional soluble bridge plug, the large-drift-diameter expansion type fully-soluble bridge plug has the advantages of large inner diameter, few parts, convenience in assembly, short complete machine, light weight, high dissolution speed, stable performance and lower cost, and is more beneficial to large-scale hydraulic staged fracturing process construction.
Description
Technical Field
The invention relates to the technical field of downhole tools in the petroleum and gas industry, in particular to a large-drift-diameter expansion type fully-soluble bridge plug, a setting connection tool of the large-drift-diameter expansion type fully-soluble bridge plug and a use method of the large-drift-diameter expansion type fully-soluble bridge plug.
Background
In recent years, national unconventional oil and gas resources such as shale oil and gas are explored and developed on a large scale, the construction method mainly adopted is a construction process of pumping bridge plug perforation subsection large-scale hydraulic fracturing, a bridge plug is one of key downhole tools in the process application, and the annual usage amount of the bridge plug is over eight thousand. The bridge plugs on the market are mainly divided into metal material bridge plugs, composite material bridge plugs and soluble material bridge plugs, and the soluble material can be dissolved in water, so that the drilling and plugging construction can be avoided, the construction cost is reduced, and the construction period is shortened, so that the use proportion of the soluble material bridge plugs is gradually increased year by year. However, the bridge plugs made of various materials are very similar in structure at present, and generally adopt a double-slip multi-rubber-cylinder design structure, and the structure mainly comprises slips embedded with ceramic teeth or hard alloy teeth, a rubber cylinder, a cone, a mandrel, a guide shoe, a shear pin and the like. The soluble material bridge plug is not technically improved in the aspect of structure except for material updating, the performance of the soluble material is not fully exerted, the dissolving performance of the soluble material bridge plug is influenced to a certain extent by traditional bridge plug parts such as a shear pin, a slip and a rubber cylinder, a tubular column needs to be lowered to pass through a well, and the construction process is not simplified in a practical sense.
Disclosure of Invention
The invention aims to solve the technical problems that a large-drift-diameter expansion type fully-soluble bridge plug, a setting connecting tool and a using method thereof are provided, a shear pin and a rubber cylinder are not needed, the number of parts is small, the weight is small, the dissolving speed is high, and the anchoring is reliable.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a large-drift-diameter expansion type fully-soluble bridge plug, which comprises a friction cylinder, a release ring and a setting ball, wherein the release ring and the setting ball are positioned in the friction cylinder;
the friction cylinder is provided with a friction coating, a slot, a stress hole, an outer slope surface, a body, an outer step, an upper slope surface and a lower slope surface; the slot is arranged at 6-12 positions along the circumference, the stress holes are arranged at two ends of the slot, an outer upper slope is arranged on the release ring, and the outer upper slope and the lower slope are identical in surface angle and are attached.
In the scheme, the friction coating is made of nickel-magnesium alloy powder materials, and the friction coating is adhered to the outer surface of the friction cylinder to form a complete outer circle surface.
In the scheme, the inclination angle of the outer slope surface is 15-30 degrees.
In the scheme, the inclination angle of the upper slope surface is 15-30 degrees, and the inclination angle of the lower slope surface is 5-15 degrees.
In the above scheme, the friction cylinder is externally provided with a processing sealing ring groove, and a sealing ring is arranged in the sealing ring groove.
In the scheme, the friction cylinder, the release ring and the setting ball are made of water-soluble magnesium-aluminum alloy.
The invention also provides a setting and connecting tool of the large-drift-diameter expansion type fully-soluble bridge plug, which is used for connecting the Baker bridge plug setting tool and comprises a push cylinder and a connecting rod, wherein the push cylinder is provided with a first internal thread, a long slotted hole and an internal step; the first internal thread is in threaded connection with an outer barrel of a Baker bridge plug setting tool, and the inner step is tightly matched with the outer step in a fitting manner; the connecting rod is designed with a third internal thread, an external thread and a boss, the third internal thread is in threaded connection with a mandrel of a Baker bridge plug setting tool, and the external thread is in matched connection with the second internal thread.
In the above scheme, the push cylinder is provided with the first set screw.
In the above scheme, the connecting rod is provided with a second set screw.
The invention also provides a use method of the large-drift-diameter expansion type fully-soluble bridge plug, which comprises the following steps:
s1, connecting a Baker bridge plug setting tool and a large-drift-diameter expansion type fully-soluble bridge plug by using the setting connecting tool to form a tool string;
s2, conveying the tool string into the well inner casing by using a cable or an oil pipe so as to enable the tool string to reach a designated position;
s3, the pushing cylinder is pushed downwards by starting a Baker bridge plug setting tool, and the pushing cylinder pushes the friction cylinder to move downwards; simultaneously, pulling the connecting rod upwards by using a Baker bridge plug setting tool, wherein the connecting rod drives the release ring to move upwards; the release ring and the friction cylinder realize relative movement, the release ring forces the friction cylinder to expand until a friction coating on the outer surface of the friction cylinder is attached to the inner surface of the casing, the friction cylinder is anchored on the inner surface of the casing due to the action of large friction force of the friction coating, meanwhile, the friction cylinder cannot continue to expand due to the constraint of the casing, the connecting rod cannot continue to drive the release ring to move upwards, finally, the second internal thread is sheared, the external thread and the second internal thread lose the connection effect, and finally, the setting and releasing of the large-drift-diameter expansion type fully-soluble bridge plug are realized, and the annular flow passage between the large-drift-diameter expansion type fully-soluble bridge plug and the casing is blocked by expansion;
s4, pulling out a Baker bridge plug setting tool and a setting connection tool by using a cable or an oil pipe, wherein the large-drift-diameter expandable fully-soluble bridge plug is left in the sleeve;
s5, throwing a setting ball from a wellhead, pushing the setting ball to reach a setting position of the large-drift-diameter expansion type fully-soluble bridge plug through pump liquid, enabling the setting ball to be attached to the upper slope surface to achieve metal sealing, and enabling the setting ball to unidirectionally block a fluid passage in the large-drift-diameter expansion type fully-soluble bridge plug;
s6, completing hydraulic fracturing construction or other operations;
s7, soaking the large-drift-diameter expansion type fully-soluble bridge plug by liquid existing in the well to enable the bridge plug to be completely dissolved, and recovering the channel in the casing.
The implementation of the large-drift-diameter expansion type fully-soluble bridge plug and the setting connection tool thereof has the following beneficial effects:
1. the large-drift-diameter expansion type fully-soluble bridge plug provided by the invention has the advantages of few parts, convenience in assembly, short and small whole machine, light weight and high dissolving speed compared with the conventional soluble bridge plug.
2. The large-drift-diameter expansion type fully-soluble bridge plug provided by the invention has large inner diameter, is beneficial to the flowback of liquid in a shaft, does not need to be stewed or shut down for a long time after fracturing is finished, and further shortens the operation period.
3. The large-drift-diameter expansion type fully-soluble bridge plug provided by the invention is made of water-soluble materials, has no insoluble structures such as ceramics and hard alloy, and can be completely dissolved without influencing the wellbore environment.
4. The large-drift-diameter expansion type fully-soluble bridge plug provided by the invention has no parts on the traditional bridge plug such as a rubber cylinder and slips, and the structure is more beneficial to large-scale hydraulic staged fracturing process construction compared with the traditional soluble bridge plug, the cost is lower, and the construction efficiency is higher.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a front view of a large bore expandable fully dissolvable bridge plug and its setting connection tool provided by the present invention;
FIG. 2 is a semi-sectional view of a large bore expandable fully dissolvable bridge plug and its setting connection tool provided by the present invention;
FIG. 3 is a semi-sectional view of a large bore expanded fully dissolvable bridge plug according to the present invention;
FIG. 4a is a front view of a friction cartridge provided by the present invention;
FIG. 4b is a half-sectional view of a friction cylinder provided by the present invention;
FIG. 4c is a block diagram of a friction cylinder designed with a seal ring groove according to the present invention;
FIG. 5 is a schematic diagram of the application of the large-bore expandable fully soluble bridge plug and its setting tool provided by the present invention;
FIG. 6 is a schematic diagram of the application of a large-bore expandable fully soluble bridge plug according to the present invention;
in the figure: 1-friction cylinder, 2-push cylinder, 3-release ring, 4-connecting rod, 5-first set screw, 6-second set screw, 7-sleeve, 8-seat sealing ball, 9-sealing ring; 101-friction coating, 102-slotting, 103-stress hole, 104-outer slope surface, 105-body, 106-outer step, 107-upper slope surface, 108-lower slope surface, 109-sealing ring groove; 201-first internal thread, 202-slotted hole, 203-internal step; 301-outer upper slope, 302-second internal thread; 401-third internal thread, 402-external thread, 403-boss.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3, the large-bore expansion type fully soluble bridge plug comprises a friction cylinder 1, a release ring 3, a setting ball 8 and a sealing ring 9. The friction cylinder 1, the release ring 3 and the setting ball 8 are made of water-soluble magnesium-aluminum alloy and can be completely dissolved after being soaked in an aqueous solution containing chloride ions for a period of time. The sealing ring 9 is made of water-soluble rubber, and can be completely dissolved by heating and soaking in clear water for a period of time.
Specifically, as shown in fig. 4a and 4b, the friction cylinder 1 is designed with a friction coating 101, a slit 102, a stress hole 103, an outer slope surface 104, a body 105, an outer step 106, an upper slope surface 107, a lower slope surface 108, and a seal ring groove 109. The friction coating 101 is made of nickel-magnesium alloy powder materials, the friction coefficient is high, and the friction coating 101 is adhered to the outer surface of the friction cylinder 1 through an adhesive to form a complete outer circle surface. 6-12 parts of the slot 102 are arranged along the circumference, and the stress holes 103 are arranged at two ends of the slot 102 and are used for preventing the slot from being broken along the two ends when the slot is opened. The inclination angle of the outer slope surface 104 is 15-30 degrees, so that the large-drift-diameter expansion type fully-soluble bridge plug can conveniently enter the casing 7. The body 105 is made of a water-soluble magnesium aluminum alloy having a good ductility, and functions not to be broken when expanded outward. The inclination angle of the upper slope surface 107 is 15-30 degrees. The inclination angle of the lower slope surface 108 is 5-15 degrees.
As shown in fig. 4c, a seal ring groove 109 can be optionally machined outside the friction cylinder 1, and the seal ring 9 is installed in the seal ring groove 109. The sealing ring 9 is used for enhancing the sealing effect between the bridge plug and the sleeve after the bridge plug is seated, the sealing ring 9 and the sealing ring groove 109 are selected, and the function of the large-drift-diameter expansion type fully-soluble bridge plug is not influenced by the design.
As shown in fig. 3, the release ring 3 is designed with an outer upward slope 301 and a second inner thread 302. The outer upper ramp 301 is angled at the same angle as the lower ramp surface 108 and conforms thereto.
The setting and connecting tool of the large-drift-diameter expansion type fully-soluble bridge plug comprises a push cylinder 2, a connecting rod 4, a first set screw 5 and a second set screw 6, and is used for connecting a Baker bridge plug setting tool with the large-drift-diameter expansion type fully-soluble bridge plug and enabling the large-drift-diameter expansion type fully-soluble bridge plug to realize releasing and setting.
As shown in fig. 2, the pushing cylinder 2 is designed with a first internal thread 201, a slot 202 and an internal step 203. First internal thread 201 and Baker bridging plug setting instrument urceolus threaded connection, interior step 203 pastes tight cooperation with outer step 106, and first holding screw 5 is installed on pushing cylinder 2, and its effect prevents that pushing cylinder 2 and Baker bridging plug setting instrument urceolus from breaking away from.
The connecting rod 4 is designed with a third internal thread 401, an external thread 402 and a boss 403. Third internal thread 401 and Baker's bridging plug setting instrument dabber threaded connection, external screw thread 402 is connected with the cooperation of second internal thread 302, and second holding screw 6 is installed on connecting rod 4, and its effect prevents that connecting rod 4 and Baker's bridging plug setting instrument dabber from breaking away, and the effect of boss 403 is avoided the full soluble bridging plug of big latus rectum inflation formula to collide with the sleeve pipe when getting into the sleeve pipe and damage.
The invention provides a large-drift-diameter expansion type fully-soluble bridge plug and a use method of a setting connection tool thereof, wherein the use method comprises the following steps:
and S1, connecting a Baker bridge plug setting tool and the large-drift-diameter expansion type fully-soluble bridge plug by using a setting connecting tool to form a tool string.
S2, running the tool string into the well casing to the specified location using a wireline or tubing.
S3, the pushing cylinder 2 is pushed downwards by starting the Baker bridge plug setting tool, and the pushing cylinder 2 pushes the friction cylinder 1 to move downwards; simultaneously, through using the Baker bridging plug setting instrument, pulling connecting rod 4 upwards, connecting rod 4 drives release ring 3 upward movement. The release ring 3 and the friction cylinder 1 realize relative movement, the release ring 3 forces the friction cylinder 1 to expand until the friction coating 101 on the outer surface of the friction cylinder 1 is attached to the inner surface of the casing 7, the friction cylinder 1 is anchored on the inner surface of the casing 7 under the action of large friction force of the friction coating 101, meanwhile, the friction cylinder 1 cannot continue to expand under the constraint of the casing 7, the connecting rod 4 cannot continue to drive the release ring 3 to move upwards, finally, the second internal thread 302 is sheared, the external thread 402 and the second internal thread 302 lose the connection effect, finally, the setting and releasing of the large-drift-diameter expansion type fully-soluble bridge plug are realized, and the annular flow passage between the large-drift-diameter expansion type fully-soluble bridge plug and the casing 7 is blocked by expansion, as shown in fig. 5.
S4, a Baker bridge plug setting tool and a setting connection tool are lifted out by using a cable or an oil pipe, and the large-drift-diameter expansion type fully-soluble bridge plug is left in the casing 7.
S5, throwing the setting ball 8 from the wellhead, pushing the setting ball 8 to reach the setting position of the large-drift-diameter expansion type fully-soluble bridge plug through pump liquid, attaching the setting ball 8 to the upper slope surface 107 to achieve metal sealing, and blocking a fluid passage in the large-drift-diameter expansion type fully-soluble bridge plug in a one-way mode through the setting ball 8, as shown in fig. 6.
And S6, completing hydraulic fracturing construction or other operations.
S7, soaking the large-drift-diameter expansion type fully-soluble bridge plug by liquid existing in the well to completely dissolve the bridge plug, and recovering the channel in the casing 7.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The large-drift-diameter expansion type fully-soluble bridge plug is characterized by comprising a friction cylinder (1), and a release ring (3) and a setting ball (8) which are positioned inside the friction cylinder (1), wherein the release ring (3) is installed at the lower part of the friction cylinder, the setting ball (8) is installed at the upper part of the friction cylinder, and the friction cylinder (1), the release ring (3) and the setting ball (8) are made of water-soluble materials;
the friction barrel (1) is provided with a friction coating (101), a slot (102), a stress hole (103), an outer slope surface (104), a body (105), an outer step (106), an upper slope surface (107) and a lower slope surface (108); the novel release ring is characterized in that 6-12 positions of the cut seam (102) are arranged along the circumference, the stress holes (103) are arranged at two ends of the cut seam (102), an outer upper slope (301) is arranged on the release ring (3), and the outer upper slope (301) and the lower slope surface (108) have the same angle and are attached to each other.
2. The large-bore expansion type fully soluble bridge plug according to claim 1, wherein the friction coating (101) is made of a nickel-magnesium alloy powder material, and the friction coating (101) is adhered to the outer surface of the friction cylinder (1) to form a complete outer circular surface.
3. The large-bore expandable fully soluble bridge plug according to claim 1, wherein the inclination angle of said outer slope surface (104) is 15-30 °.
4. The large-bore expandable fully soluble bridge plug according to claim 1, wherein the inclination angle of the upper slope surface (107) is 15-30 ° and the inclination angle of the lower slope surface (108) is 5-15 °.
5. The large-bore expansion type fully soluble bridge plug according to claim 1, wherein a machining seal ring groove (109) is formed outside the friction cylinder (1), and a seal ring (9) is installed in the seal ring groove (109).
6. The large-bore expandable fully soluble bridge plug according to claim 1, wherein the friction cylinder (1), the release ring (3) and the setting ball (8) are made of water-soluble magnesium-aluminum alloy using water-soluble magnesium-aluminum alloy.
7. The large-drift-diameter expansion type fully-soluble bridge plug setting tool is used for connecting a Baker bridge plug setting tool and is characterized by comprising a push cylinder (2) and a connecting rod (4), wherein the push cylinder (2) is provided with a first internal thread (201), a long slotted hole (202) and an internal step (203);
the first internal thread (201) is in threaded connection with an outer cylinder of a Baker bridge plug setting tool, and the inner step (203) is tightly matched with the outer step (106) in a sticking manner;
the connecting rod (4) is provided with a third internal thread (401), an external thread (402) and a boss (403), the third internal thread (401) is in threaded connection with a mandrel of a Baker bridge plug setting tool, and the external thread (402) is in fit connection with the second internal thread (302).
8. The setting connection tool of the large-bore expansion type fully-soluble bridge plug as claimed in claim 7, wherein a first set screw (5) is installed on the push cylinder (2).
9. The setting connection tool of the large-bore expansion type fully soluble bridge plug as claimed in claim 7, wherein a second set screw (6) is installed on the connecting rod (4).
10. A method of using the large bore expandable fully soluble bridge plug of claim 1, comprising the steps of:
s1, connecting a Baker bridge plug setting tool and a large-drift-diameter expansion type fully-soluble bridge plug by using the setting connecting tool of claim 8 to form a tool string;
s2, conveying the tool string into the well inner casing by using a cable or an oil pipe so as to enable the tool string to reach a designated position;
s3, the pushing cylinder (2) is pushed downwards by starting a Baker bridge plug setting tool, and the pushing cylinder (2) pushes the friction cylinder (1) to move downwards; simultaneously, the connecting rod (4) is pulled upwards by using a Baker bridge plug setting tool, and the connecting rod (4) drives the release ring (3) to move upwards; the release ring (3) and the friction cylinder (1) realize relative movement, the release ring (3) forces the friction cylinder (1) to expand until a friction coating (101) on the outer surface of the friction cylinder (1) is jointed with the inner surface of the sleeve (7), and the friction cylinder (1) is anchored on the inner surface of the sleeve (7) due to the large friction force action of the friction coating (101), meanwhile, the friction cylinder (1) is restrained by the sleeve (7) and can not expand continuously, so that the connecting rod (4) can not drive the release ring (3) to move upwards continuously, and finally the second internal thread (302) is cut, the external thread (402) and the second internal thread (302) lose the connecting function, finally realizing the setting and releasing of the large-drift-diameter expansion type fully-soluble bridge plug, the large-drift-diameter expansion type fully soluble bridge plug seals an annular flow passage between the large-drift-diameter expansion type fully soluble bridge plug and the casing (7) through expansion;
s4, pulling out a Baker bridge plug setting tool and a setting connection tool by using a cable or an oil pipe, wherein the large-drift-diameter expandable fully-soluble bridge plug is left in the casing (7);
s5, throwing a setting ball (8) from a wellhead, pushing the setting ball (8) to reach a setting position of the large-drift-diameter expansion type fully-soluble bridge plug through pump liquid, enabling the setting ball (8) to be attached to the upper slope surface (107) to achieve metal sealing, and blocking a fluid passage in the large-drift-diameter expansion type fully-soluble bridge plug in a one-way mode through the setting ball (8);
s6, completing hydraulic fracturing construction or other operations;
s7, soaking the large-drift-diameter expansion type fully-soluble bridge plug by liquid existing in the well to enable the bridge plug to be completely dissolved, and recovering the channel in the casing (7).
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| CN202011411122.1A CN112576220A (en) | 2020-12-04 | 2020-12-04 | Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method |
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| CN202011411122.1A CN112576220A (en) | 2020-12-04 | 2020-12-04 | Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method |
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| US20160138363A1 (en) * | 2013-11-22 | 2016-05-19 | Target Completions, LLC | IPacker Bridge Plug with Slips |
| WO2016044597A1 (en) * | 2014-09-17 | 2016-03-24 | Target Completions, LLC | Packer bridge plug with slips |
| CN108643849A (en) * | 2018-04-11 | 2018-10-12 | 中国石油天然气股份有限公司 | soluble slip and soluble bridge plug |
| CN108894749A (en) * | 2018-07-20 | 2018-11-27 | 四机赛瓦石油钻采设备有限公司 | A kind of screw thread is given up solvable bridge plug |
| CN109973045A (en) * | 2019-03-29 | 2019-07-05 | 东方宝麟科技发展(北京)有限公司 | Complete solvable bridge plug |
| CN210033370U (en) * | 2019-05-21 | 2020-02-07 | 卢晓东 | Soluble bridge plug |
| CN110792408A (en) * | 2019-11-13 | 2020-02-14 | 百勤能源科技（惠州）有限公司 | Hard-sealing soluble bridge plug |
| CN110905443A (en) * | 2019-12-04 | 2020-03-24 | 中国石油大学(华东) | Soluble metal sealing fracturing bridge plug |
| CN111441742A (en) * | 2020-05-13 | 2020-07-24 | 中国石油集团渤海钻探工程有限公司 | Soluble bridge plug seat sealing head bag |
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