CN110725664A - Slurry stopping mechanism for well sealing and well sealing method thereof - Google Patents
Slurry stopping mechanism for well sealing and well sealing method thereof Download PDFInfo
- Publication number
- CN110725664A CN110725664A CN201911205172.1A CN201911205172A CN110725664A CN 110725664 A CN110725664 A CN 110725664A CN 201911205172 A CN201911205172 A CN 201911205172A CN 110725664 A CN110725664 A CN 110725664A
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- well
- grouting
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- drilling
- connector
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- 238000007789 sealing Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 239000002002 slurry Substances 0.000 title description 17
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 239000011440 grout Substances 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 239000012267 brine Substances 0.000 abstract description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 abstract 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract 1
- 235000010333 potassium nitrate Nutrition 0.000 abstract 1
- 229910002651 NO3 Inorganic materials 0.000 description 7
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 235000002639 sodium chloride Nutrition 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-N sodium;sulfuric acid Chemical compound [H+].[H+].[Na+].[O-]S([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a grout stopping mechanism for well sealing and a well sealing method thereof, aiming at providing a grout stopping mechanism for well sealing which has simple structure, ingenious design and easy operation, and a well sealing method which adopts in-hole grouting and combined hole external re-drilling grouting to ensure that cement paste can be better cemented with a rock layer to play a role of protecting walls and sealing cracks and blocking saltpeter mine brine generated inside and outside a brine well from stringing along the pipe wall.
Description
Technical Field
The invention discloses a well sealing structure, in particular to a slurry stopping mechanism for well sealing.
Background
The salt deposit is mainly mudstone, siltstone and their interbedded layer.
The nitrate ore is mainly characterized in that a drilling water solution method is adopted to mine underground 470m-575m high-level rock salt and associated thenardite ore, an underground dissolving cavity (a goaf) is formed in the range of an ore area after years of mining, obvious ground settlement occurs during mining and after shutdown of the ore area, and the nitrate brine in the well and underground is in hydraulic connection with a peripheral underground (fresh water) water source, so that the lives of peripheral residents are seriously influenced, even the growth of animals and plants is influenced, therefore, the abandoned and stopped-mining salt well is thoroughly sealed by practical and effective measures, and the nitrate brine in a scrapped well is prevented from being subjected to halogen up-flowing along the cement ring inside and outside the casing pipe of the brine well, which is particularly important.
In the prior art, a well sealing mode is generally adopted for cementing and sealing a well by sleeve forging and milling, but the sleeve of the brine extraction well is seriously deformed due to factors such as years of mining history of nitrate ores, ground settlement and the like; and (5) corrosion and crystallization of the brine shut-in well casing. Therefore, in the treatment process, the drilling machine, the hydraulic jack, the auxiliary tool jar and the retractable fisher are repeatedly used for pulling out the sleeve, but the sleeve is seriously deformed, the annular space gap is buried, the sleeve cannot be pulled out of a drill hole, the sleeve forging and milling cementing well sealing process cannot be normally implemented, and the peripheral drilling high-pressure grouting process is adopted for sealing the water guide channel.
In order to ensure the quality of a sealed well in the sealing process, a pressure resistance test needs to be carried out on a slurry conveying pipeline before grouting, the upper end of a first opening of a well head is sealed, clear water is injected into the well through a high-pressure pump for pressure test, target pressure is determined, then grouting is carried out, the well head is sealed at intervals in the process to estimate pressure of a second opening (a grouting target section), but the method is complex to operate and low in accuracy.
Disclosure of Invention
In view of the above problems, a first object of the present invention is to provide a slurry stopping mechanism for well sealing, which has a simple structure, a smart design, a wide application range, and an easy operation.
The second purpose of the invention is to provide a well plugging method which adopts in-hole grouting and combined hole out-hole re-drilling grouting, so that cement slurry can be better cemented with a rock layer to achieve the functions of protecting walls and plugging cracks, blocking nitrate mine brine generated inside and outside a brine extraction well from stringing along the pipe wall, and being more scientific and efficient.
In order to solve the above technical problem, a first technical solution provided by the present invention is as follows:
the utility model provides a shut-in well is with only thick liquid mechanism, includes the drilling rod, the one end of drilling rod be connected with the connector, the one end is connected with down the connector in addition, the cover is established and is equipped with hollow round platform on the drilling rod, the top surface of hollow round platform be close to down the connector, the bottom surface is close to the connector.
Further, in the grout stopping mechanism for well sealing, the diameter of the top surface of the hollow round table is slightly smaller than that of the two openings; the diameter of the bottom surface of the hollow round table is slightly smaller than the diameter of an opening.
Furthermore, in the grout stopping mechanism for well sealing, the hollow round table is made of rubber.
Further, foretell well shut-in is with ending thick liquid mechanism, last connector inside be equipped with the internal thread, the outer wall is equipped with a plurality of joint grooves of going up.
Further, foretell well shut-in is with ending thick liquid mechanism, lower connector periphery be equipped with the external screw thread, the outer wall is equipped with a plurality of lower joint grooves.
The second technical scheme provided by the invention is as follows:
a well sealing method sequentially comprises the following steps:
1) drilling 3 new wells at the periphery beside the well to be sealed in an annular manner to form a closed ring, and setting the positions of the drilled holes within 50cm beside the original well to be sealed;
2) performing a water pressure test by using the grout stopping mechanism of claim 1 in a grouting section;
3) according to the pressure value, grouting at the second opening section of the new well, wherein the grouting reaches the grout stopping standard, lifting the drill, and sealing the well by cement in the hole;
4) and (5) repeating the step 2) to carry out the rest two new wells for well sealing.
5) And (3) after the well is sealed according to the field drifting depth, pulling out the extractable inner sleeve, then putting in a bridge plug, and repeating the method in the step 2) and the step 3).
Further, in the well sealing method, the distance from the new well to the well to be sealed is 50 cm.
Further, in the above well shut-in method, the new well opening method is:
1) determining the position of a new well, installing a drilling machine, adopting a large-diameter drill bit to drill to a stable bedrock, and setting a casing to fix the well;
2) and after waiting for setting for 48 hours, drilling to the top of the grouting section by using a small-diameter drill bit, and continuously drilling to the bottom of the grouting section.
Further, in the above well sealing method, the depth of the new well is 4 times of the original depth of the well to be sealed.
Compared with the prior art, the grout stopping mechanism for well sealing provided by the invention has the advantages that when the round table is made of rubber and falls into the grouting section in the well along with the drill rod, a lower sealing system is formed, then grouting is started, and as the diameter of the lower end of the round table is smaller than that of the upper end of the round table, grout is prevented from flowing back out of a drilled hole. And a sealing structure is formed by the circular truncated cone and the upper well, so that the pressure of the second opening (the grouting destination end) can be observed along with time according to the pressure on the grouting pump, when the slurry is injected to a certain range, the pressure gauge does not rotate, the grouting is finished, the construction reliability is ensured, and the reverse well condition caused by overlarge pressure in the construction is also ensured
The well sealing method provided by the invention adopts in-hole grouting and combined hole out-hole re-drilling grouting, so that cement paste can be better cemented with a rock layer to protect the wall and seal cracks, and the effect of preventing nitrate mine brine generated inside and outside the brine extraction well from stringing along the pipe wall is achieved, the method is more scientific and efficient, and the effect better than the existing well sealing scheme can be achieved; especially, a new well is arranged around the original well to be sealed to form a closed ring, so that the grouting effect can be better realized.
Drawings
FIG. 1 is a schematic structural diagram of a slurry stopping mechanism for well sealing provided by the invention;
FIG. 2 is a cross-sectional view of a slurry stopping mechanism for well sealing provided by the invention;
FIG. 3 is a diagram illustrating the operation of the slurry stopping mechanism for well sealing according to the present invention.
The symbols in the drawings indicate the following elements and their like:
drilling rod 1, go up connector 2, lower connector 3, hollow round platform 4, internal thread 5, go up joint groove 6, external screw thread 7, lower joint groove 8.
Detailed Description
The following claims are presented in further detail with reference to the embodiments, but not to be construed as limiting the invention in any way, and any number of modifications which may be made by anyone within the scope of the claims are within the scope of the claims.
Example 1
The invention provides a slurry stopping mechanism for well sealing, and referring to fig. 1 to 3, the well is composed of a first open well A with a larger caliber and a second open well B with a smaller caliber from top to bottom. This grout stopping mechanism for shut-in well includes drilling rod 1, the one end of drilling rod 1 be connected with connector 2, one end is connected with connector 3 down in addition, drilling rod 1 goes up the cover and is established and be equipped with hollow round platform 4, the top surface (the face that the diameter is less) of hollow round platform 4 be close to connector 3 down, the bottom surface (the face that the diameter is great) is close to connector 2.
In order to facilitate the drill rod 1 to drive the hollow round table 4 to fall to the diameter of the two open wells B, the diameter of the top surface of the hollow round table 4 is slightly smaller than the diameter of the two openings, the diameter difference is 0.8cm, in order to facilitate the formation of a sealing system in a grouting section after grouting and prevent the grout from returning to the drill rod, the diameter of the bottom surface of the hollow round table 4 is slightly smaller than the diameter of the one opening, and the diameter difference is usually 1 cm.
The hollow round table 4 is made of rubber, and the rubber has certain elasticity, so that the hollow round table is easier to enter the well, the sealing performance of a grouting section system during grouting is facilitated, and the well sealing effect is ensured.
In order to facilitate the connection with other drilling rods, the inside internal thread 5 that is equipped with of last connector 2, the outer wall is equipped with a plurality of joint grooves 6 of going up, 3 peripheries of lower connector be equipped with external screw thread 7, the outer wall is equipped with a plurality of joint grooves 8 down, it is fixed through threaded connection between internal and external screw thread 5, 7. It should be noted that only the drill rod near the connection part between the two openings and the upper well section needs to be sleeved with the hollow circular truncated cone, and other parts only need to adopt conventional drill rods.
Example 2
The well sealing method provided by the invention specifically comprises the following steps:
1. drilling apparatus
The types of the drilling machines are water XY-4, XY-5 drilling machines and SMJ5380TZJ vehicle-mounted drilling machines.
2. Grouting equipment
The grouting pump model is 3NB-130, 3NBB260-35/10-7-45, 3NBB390-52/11-8-55, NBB-390/15, BW-250, and the maximum pump capacity is 390L/min; the pipe diameters of the grouting pipes are phi 51mm and phi 38mm, and the maximum pressure resistance is 16 MPa; the grouting raw material is 525 cement paste.
3. Drilling process
The method comprises the following steps of leveling a field → positioning a drilling position within 50cm beside an original well → a chassis and a drilling tower, installing a drilling machine → preparing an opening hole → drilling in a phi 152mm aperture until a stable bedrock (namely a first opening section) → descending a phi 139.7mm 5.0mm casing → well cementation, waiting for setting for 48 hours → drilling to the top of a grouting section (namely a second opening section) by using a phi 91mm drill bit (for example 200m) → continuing drilling to the bottom of the grouting section (for example 220m) → performing a pressurized water test on the grouting section (for example 200 and 220m sections) by using the pulp structure of the embodiment 1 → performing new well second opening section grouting → grouting to achieve a slurry stopping standard → drilling lifting and sealing the well by using cement in the hole.
In order to achieve better well sealing effect, the depth of the new well is usually 4 times of the original depth of the well to be sealed.
4. Well treatment
And (3) according to the field drifting depth (at least ensuring that the original well enters a bedrock surface), pulling out the inner sleeve capable of being lifted, then putting in a bridge plug, according to a pressure value, performing grouting at the second opening section of the original well, wherein the grouting reaches a grout stopping standard (can be observed through a pressure gauge on a grouting pump), lifting the well, and sealing the well by cement in the hole.
Slurry parameters: the selection of slurry parameters depends on the water inflow of a single hole and the development degree of the karst. The water-cement ratio of the single-liquid cement slurry is 1: 1-0.8: 1 (weight ratio) is generally thin first and thick second, and double-slurry c: s 1: 1-1: 0.3 (volume ratio), and the additives of the single-fluid cement paste are as follows: triethanolamine, water glass and salt.
Finishing standard of single-hole grouting: when the pumping capacity is below 80L/min, the new well orifice pressure reaches the final hole pressure of 6.0MPa, and the duration is not less than 20min, and the method can be finished. When the first order drilling grouting is carried out, if the bottom drum is serious, the final hole pressure can be properly reduced.
According to the technical scheme provided by the invention, holes are opened beside the original well again for grouting, the range of grouting outside the casing is larger, particularly, the longitudinal depth is 4-5 times of that of the original scheme (4-5 m in the original scheme, and the grouting section of the new scheme is 20m), and the original purpose can be better achieved. The condition that tools cannot be put into the well for construction due to deformation of the casing is avoided; by adopting the in-hole grouting and the combined hole outside-hole re-drilling grouting, the cement slurry can be better cemented with a rock layer to protect the wall and block the cracks, and the nitrate mine brine generated inside and outside the brine extraction well is prevented from being strung along the pipe wall, so that the method is more scientific and efficient, and can achieve the better effect than the original well sealing scheme.
Claims (9)
1. The utility model provides a shut-in well is with only thick liquid mechanism, includes drilling rod (1), its characterized in that, the one end of drilling rod (1) be connected with connector (2), the other end is connected with down connector (3), drilling rod (1) is gone up the cover and is established hollow round platform (4), the top surface of hollow round platform (4) be close to down connector (3), the bottom surface is close to last connector (2)
2. The grout stopping mechanism for well plugging according to claim 1, wherein the diameter of the top surface of the hollow round table (4) is slightly smaller than the diameter of the two openings; the diameter of the bottom surface of the hollow round table (4) is slightly smaller than the diameter of an opening.
3. The grout stopping mechanism for well sealing according to claim 1, wherein the hollow round table (4) is made of rubber.
4. The grout stopping mechanism for well sealing according to claim 1, wherein the upper connector (2) is internally provided with internal threads (5), and the outer wall of the upper connector is provided with a plurality of upper clamping grooves (6).
5. The grout stopping mechanism for well sealing according to claim 1, wherein the outer periphery of the lower connector (3) is provided with external threads (7), and the outer wall of the lower connector is provided with a plurality of lower clamping grooves (8).
6. A well sealing method is characterized by sequentially comprising the following steps:
1) drilling 3 new wells at the periphery beside the well to be sealed in an annular manner to form a closed ring, and setting the positions of the drilled holes within 50cm beside the original well to be sealed;
2) performing a water pressure test by using the grout stopping mechanism of claim 1 in a grouting section;
3) according to the pressure value, grouting at the second opening section of the new well, wherein the grouting reaches the grout stopping standard, lifting the drill, and sealing the well by cement in the hole;
4) and (5) repeating the step 2) to carry out the rest two new wells for well sealing.
5) And (3) after the well is sealed according to the field drifting depth, pulling out the extractable inner sleeve, then putting in a bridge plug, and repeating the method in the step 2) and the step 3).
7. A method according to claim 6, wherein the new well is 50cm from the well to be sealed.
8. A method of closing a well according to claim 6, wherein the new well is opened by:
1) determining the position of a new well, installing a drilling machine, adopting a large-diameter drill bit to drill to a stable bedrock, and setting a casing to fix the well;
2) and after waiting for setting for 48 hours, drilling to the top of the grouting section by using a small-diameter drill bit, and continuously drilling to the bottom of the grouting section.
9. A method as claimed in claim 6, wherein the depth of the new well is 4 times the depth of the original well to be sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205172.1A CN110725664B (en) | 2019-11-29 | 2019-11-29 | Slurry stopping mechanism for well sealing and well sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205172.1A CN110725664B (en) | 2019-11-29 | 2019-11-29 | Slurry stopping mechanism for well sealing and well sealing method thereof |
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| CN110725664A true CN110725664A (en) | 2020-01-24 |
| CN110725664B CN110725664B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911205172.1A Active CN110725664B (en) | 2019-11-29 | 2019-11-29 | Slurry stopping mechanism for well sealing and well sealing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160728A (en) * | 2020-09-02 | 2021-01-01 | 中煤科工集团西安研究院有限公司 | Treatment method for mine water exploration and drainage drill hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343952A (en) * | 1992-10-22 | 1994-09-06 | Shell Oil Company | Cement plug for well abandonment |
| CN205117377U (en) * | 2015-10-20 | 2016-03-30 | 山东科技大学 | Gob entry driving fender is consolidated and is used slip casting anchor rope |
| CN205260062U (en) * | 2015-12-30 | 2016-05-25 | 山东科技大学 | Self -drilling tests oneself prestressing force to be let and presses slip casting stock |
| CN205422775U (en) * | 2016-03-21 | 2016-08-03 | 江西工程学院 | Anchor rod device |
| US20160348464A1 (en) * | 2015-05-27 | 2016-12-01 | Wild Well Control, Inc. | Method of sealing wells by injection of sealant |
| CN205895289U (en) * | 2016-08-19 | 2017-01-18 | 泰安振声科技工程有限公司 | Slip casting anchor rope with double -deck thick liquid and spiral stirring function of ending |
| CN211201868U (en) * | 2019-11-29 | 2020-08-07 | 广东煤炭地质二O二勘探队 | Slurry stopping mechanism for well sealing |
-
2019
- 2019-11-29 CN CN201911205172.1A patent/CN110725664B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343952A (en) * | 1992-10-22 | 1994-09-06 | Shell Oil Company | Cement plug for well abandonment |
| US20160348464A1 (en) * | 2015-05-27 | 2016-12-01 | Wild Well Control, Inc. | Method of sealing wells by injection of sealant |
| CN205117377U (en) * | 2015-10-20 | 2016-03-30 | 山东科技大学 | Gob entry driving fender is consolidated and is used slip casting anchor rope |
| CN205260062U (en) * | 2015-12-30 | 2016-05-25 | 山东科技大学 | Self -drilling tests oneself prestressing force to be let and presses slip casting stock |
| CN205422775U (en) * | 2016-03-21 | 2016-08-03 | 江西工程学院 | Anchor rod device |
| CN205895289U (en) * | 2016-08-19 | 2017-01-18 | 泰安振声科技工程有限公司 | Slip casting anchor rope with double -deck thick liquid and spiral stirring function of ending |
| CN211201868U (en) * | 2019-11-29 | 2020-08-07 | 广东煤炭地质二O二勘探队 | Slurry stopping mechanism for well sealing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160728A (en) * | 2020-09-02 | 2021-01-01 | 中煤科工集团西安研究院有限公司 | Treatment method for mine water exploration and drainage drill hole |
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| CN110725664B (en) | 2024-06-25 |
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