CN111535743A - Marine natural gas hydrate reservoir transformation appliance and use method thereof - Google Patents
Marine natural gas hydrate reservoir transformation appliance and use method thereof Download PDFInfo
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- CN111535743A CN111535743A CN202010400349.XA CN202010400349A CN111535743A CN 111535743 A CN111535743 A CN 111535743A CN 202010400349 A CN202010400349 A CN 202010400349A CN 111535743 A CN111535743 A CN 111535743A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 230000009466 transformation Effects 0.000 title claims abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 54
- 238000005452 bending Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 210000002445 nipple Anatomy 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 9
- 239000003607 modifier Substances 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 238000002407 reforming Methods 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 11
- 239000003345 natural gas Substances 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- -1 natural gas hydrates Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
-
- 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
-
- 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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/043—Directional drilling for underwater installations
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a marine natural gas hydrate reservoir transformation appliance and a use method thereof, belonging to the technical field of marine drilling, wherein the transformation appliance comprises a guide shoe, a deflecting drill rod, a hydraulic packer, a high-pressure grouting short section, a wireless drilling-while-drilling inclination measuring short section, a single-bending screw and a drill bit.
Description
Technical Field
The invention relates to the technical field of marine drilling, in particular to a marine natural gas hydrate ground reservoir reformer and a using method thereof.
Background
The natural gas hydrate is commonly called 'combustible ice' and 'solid gas', and is characterized by wide distribution range, rich reserves, large energy density, cleanness and high efficiency. Research has shown that the total amount of natural gas hydrates in the world's oceans, converted to methane gas, is up to 2 x 1016 cubic meters with a carbon content 2 times greater than the sum of all known petroleum, natural gas, and coal minerals in the world to date. Through exploration in recent years, natural gas hydrate resources with huge reserves are found in the south China sea, and two times of trial exploitation are respectively carried out in 2017 and 2020, so that huge success is achieved.
However, in the process of pilot mining of the natural gas hydrate, it is found that along with the continuous decomposition of the hydrate, the space originally filled with the hydrate gradually loses support after the hydrate is decomposed into water and natural gas, the stratum continuously settles under the pressure of upper seawater, even seabed geological disasters such as stratum collapse, landslide and the like can be generated if the hydrate decomposition scale is large, and meanwhile along with the continuous settling of the stratum, the porosity in the hydrate storage layer is continuously reduced, so that the migration channels of the natural gas and the decomposed water are less and less, and the mining efficiency of the hydrate is severely restricted.
Disclosure of Invention
The invention aims to solve the problems of stratum collapse, settlement, natural gas decomposition, water transportation channel blockage and the like which may occur in the process of exploiting an ocean natural gas hydrate, and provides a marine natural gas hydrate underground reservoir stratum modifier and a using method thereof.
An ocean natural gas hydrate reservoir transformation appliance comprises a guide shoe, a deflecting drill rod, a hydraulic packer, a high-pressure grouting short section, a wireless while-drilling inclination measuring short section, a single-bending screw motor and a drill bit, wherein the guide shoe is fixedly arranged in a sleeve at a preset deflecting position;
the high-pressure grouting short section consists of a shear pin, a sliding sleeve, a grouting hole and a steel ball seat, a steel ball is put through a wellhead, the steel ball is seated on the steel ball seat to be suppressed, the shear pin is sheared, the sliding sleeve is pushed to slide under the action of grouting pressure, and the grouting hole is exposed;
the hydraulic nozzle is arranged on the drill bit, the reservoir is cut mainly through high-pressure water jet in the drilling process, the drilling speed is accelerated, the check valve is arranged at the left end of the drill bit, the drilling fluid can smoothly flow to the right end from the left end of the drill bit, and the high-pressure slurry cannot flow back to the interior of the reformer from the right end of the drill bit in the grouting process;
a method of using a marine gas hydrate reservoir reconstruction tool, comprising the steps of:
s1, firstly, the guide shoe is lowered to a preset depth along with the drill rod, and the guide shoe is fixed in a well-inclined direction;
s2, sequentially assembling a deflecting drill rod, a hydraulic packer, a high-pressure grouting short section, a wireless while-drilling inclination measuring short section, a single-bending screw motor and a drill bit, and lowering the deflecting drill rod to the position of a guide shoe;
s3, pumping drilling fluid into an inner hole of the deflecting drill rod, starting to implement directional deflecting drilling, transmitting a drilling track to a drilling ship in real time through a wireless while-drilling inclination measuring nipple, and adjusting the well inclination and the azimuth angle by adopting a combined drilling mode of the deflecting drill rod and a single-bending screw motor, wherein the hydraulic packer is not inflated and expanded in the process;
s4, after the reservoir reformer drills to a target reservoir, stopping the rotary drilling tool and pumping drilling fluid, and pulling the reservoir reformer back for a certain distance to ensure that a sliding sleeve of the high-pressure grouting short section has enough distance when extending out, then injecting a pad fluid into the hole to replace slurry in the hole, then throwing a steel ball from a well mouth, pumping the grouting fluid, accelerating to push the steel ball to fall into the high-pressure grouting short section, when the steel ball falls into a steel ball seat of the high-pressure grouting short section and blocks a channel, the pressure of the grouting fluid is gradually increased, when the starting pressure of the hydraulic packer is reached, the hydraulic packer expands and is tightly attached to a well wall to form a closed space from the hydraulic packer to a drill bit, and at the moment, along with the continuous grouting, the pressure of the slurry is continuously increased until a shearing pin short section of the high-pressure grouting is cut off and the sliding sleeve in the high-pressure grouting short section, high-pressure grouting liquid is poured into a gap between the reformer and a well wall, and is finally injected into a reservoir under continuously increased pressure, so that the strength and the permeability of the reservoir are improved;
s5, after grouting, removing pressure from a grouting pump at the wellhead, recovering the original outer diameter of the hydraulic packer, and lifting the reservoir stratum modifier from the directional well, thereby completing stratum modification of one area, completing stratum modification of a large area by reciprocating, and realizing the improvement of the strength and permeability of the marine hydrate reservoir stratum.
The specific flow path of the drilling fluid in the step S3 is: a central hole of a deflecting drill rod → a central hole of a hydraulic packer → a central hole of a high-pressure grouting short section → a wireless measurement while drilling short section inner hole → a single bent screw motor → outflow of a central hole of a drill bit → an annular gap between a reservoir reformer and a well wall → a gap between the deflecting drill rod and a sleeve inner hole → a well head.
The specific flow path of the grouting liquid in step S4 is: a central hole of a deflecting drill rod → a central hole of a hydraulic packer → a central hole of a high-pressure grouting nipple → a grouting hole of the high-pressure grouting nipple → an annular gap (from the hydraulic packer to a drill bit part) between a reservoir reformer and a well wall → a hydrate reservoir.
The invention has the beneficial effects that:
the invention relates to a marine natural gas hydrate reservoir reformer and a using method thereof. In the whole process, the integrated operation of directional drilling and high-pressure grouting is realized, the drilling times under the drilling condition is reduced, and the reservoir transformation efficiency is improved. And through experimental tests, the reservoir stratum modifier can effectively form a high-molecular net structure within 1 hour after injection, improves the strength of the reservoir stratum, simultaneously improves the permeability of the stratum, is beneficial to the migration of decomposed gas and water of the hydrate, and can assist the safe and efficient exploitation of the hydrate.
Drawings
FIG. 1 is a schematic diagram of the marine gas hydrate reservoir reformer principle of the present invention;
fig. 2 is a schematic structural diagram of a high-pressure grouting nipple of the marine natural gas hydrate reservoir reformer.
Description of reference numerals:
the device comprises a guide shoe 1, a deflecting drill rod 2, a hydraulic packer 3, a high-pressure grouting short section 4, a wireless measurement while drilling short section 5, a single-bending screw motor 6 and a drill bit 7;
4 high-pressure grouting short sections, 4-1 shear pins, 4-2 sliding sleeves, 4-3 grouting holes and 4-4 steel ball seats.
Detailed Description
Referring to fig. 1 and 2, an offshore natural gas hydrate reservoir transformation appliance comprises a guide shoe 1, a deflecting drill pipe 2, a hydraulic packer 3, a high-pressure grouting nipple 4, a wireless while-drilling inclination measuring nipple 5, a single-bending screw motor 6 and a drill bit 7, wherein the guide shoe 1 is fixedly arranged in a casing pipe at a preset deflecting position, and the deflecting drill pipe 2, the hydraulic packer 3, the high-pressure grouting nipple 4, the wireless while-drilling inclination measuring nipple 5, the single-bending screw motor 6 and the drill bit 7 are sequentially connected through threads;
the high-pressure grouting short section 4 consists of a shearing pin 4-1, a sliding sleeve 4-2, a grouting hole 4-3 and a steel ball seat 4-4, a steel ball is put in through a wellhead, the steel ball is seated on the steel ball seat 4-4 to be subjected to pressure holding, the shearing pin 4-1 is sheared, the sliding sleeve 4-2 is pushed to slide under the action of grouting pressure, and the grouting hole 4-3 is exposed;
the hydraulic nozzle is arranged on the drill bit 7, the reservoir is cut mainly through high-pressure water jet in the drilling process, the drilling speed is accelerated, the check valve is arranged at the left end of the drill bit 7, it is ensured that drilling fluid can smoothly flow to the right end from the left end of the drill bit 7, and high-pressure slurry cannot reversely flow back to the interior of the reformer from the right end of the drill bit 7 in the grouting process;
a method of using a marine gas hydrate reservoir reconstruction tool, comprising the steps of:
s1, firstly, the guide shoe 1 is lowered to a preset depth along with the drill rod, and the guide shoe is well arranged in an inclined direction and fixed;
s2, sequentially assembling the deflecting drill pipe 2, the hydraulic packer 3, the high-pressure grouting nipple 4, the wireless while-drilling inclination measuring nipple 5, the single-bending screw motor 6 and the drill bit 7, and lowering the deflecting drill pipe to the guide shoe 1;
s3, pumping drilling fluid into an inner hole of the deflecting drill rod 2, starting to implement directional deflecting drilling, transmitting a drilling track to a drilling ship in real time through a wireless while-drilling inclination measuring nipple 5, adjusting the well deflection and the azimuth angle by adopting a combined drilling mode of the deflecting drill rod and a single-bending screw motor, and enabling the hydraulic packer 3 to be not inflated and expanded in the process;
s4, after the reservoir stratum modifier drills into a target reservoir stratum, stopping rotating the drilling tool and pumping drilling fluid, pulling the reservoir stratum modifier back for a certain distance to ensure that a sliding sleeve 4-2 of a high-pressure grouting short section 4 has enough distance when extending, then injecting a pad fluid into the hole to replace slurry in the hole, then throwing a steel ball from a well mouth, pumping the grouting fluid, accelerating to push the steel ball to fall into the high-pressure grouting short section 4, when the steel ball falls into a steel ball seat 4-4 of the high-pressure grouting short section 4 and blocks a channel, the pressure of the grouting fluid is gradually increased, when the starting pressure of a hydraulic packer 3 is reached, the hydraulic packer 3 expands and is tightly attached to a well wall to form a closed space from the hydraulic packer 3 to a drill bit 7, at the moment, the pressure of the grouting short section is continuously increased along with the continuous progress of grouting until a shear pin 4-1 of the, pushing a sliding sleeve 4-2 in the high-pressure grouting short section 4 to extend out, so that a grouting hole 4-3 in the sliding sleeve is exposed, high-pressure grouting liquid is poured into a gap between the transformation and a well wall, and is finally injected into a reservoir under continuously increased pressure, and the strength and the permeability of the reservoir are improved;
s5, after grouting, removing pressure from a grouting pump at the wellhead, recovering the original outer diameter of the hydraulic packer, and lifting the reservoir stratum modifier from the directional well, thereby completing stratum modification of one area, completing stratum modification of a large area by reciprocating, and realizing the improvement of the strength and permeability of the marine hydrate reservoir stratum.
The specific flow path of the drilling fluid in the step S3 is: the method comprises the steps of (1) deflecting a drill rod 2 central hole → a hydraulic packer 3 central hole → a high-pressure grouting nipple 4 central hole → a wireless measurement while drilling nipple 5 inner hole → a single bent screw motor 6 → a drill bit 7 central hole outflow → an annular gap between a reservoir reformer and a well wall → a gap between a deflecting drill rod and a casing inner hole → a well head.
The specific flow path of the grouting liquid in step S4 is: a central hole of a deflecting drill rod 2 → a central hole of a hydraulic packer 3 → a central hole of a high-pressure grouting nipple 4 → a grouting hole of the high-pressure grouting nipple 4 → an annular gap (from the hydraulic packer to a drill bit part) between a reservoir reformer and a well wall → a hydrate reservoir.
Claims (6)
1. A marine gas hydrate reservoir reforming apparatus, characterized in that: the high-pressure deviation-measuring device comprises a guide shoe (1), a deflecting drill rod (2), a hydraulic packer (3), a high-pressure grouting nipple (4), a wireless deviation-measuring while drilling nipple (5), a single-bending screw motor (6) and a drill bit (7), wherein the guide shoe (1) is fixedly arranged in a sleeve at a preset deflecting position, and the deflecting drill rod (2), the hydraulic packer (3), the high-pressure grouting nipple (4), the wireless deviation-measuring while drilling nipple (5), the single-bending screw motor (6) and the drill bit (7) are sequentially connected through threads.
2. A marine natural gas hydrate reservoir reconstruction appliance according to claim 1, wherein: the high-pressure grouting short section (4) is composed of a shearing pin (4-1), a sliding sleeve (4-2), a grouting hole (4-3) and a steel ball seat (4-4), a steel ball is put in through a wellhead, the steel ball is seated on the steel ball seat (4-4) to be suppressed, the shearing pin (4-1) is cut off, the sliding sleeve (4-2) is pushed to slide under the action of grouting pressure, and the grouting hole (4-3) is exposed.
3. A marine natural gas hydrate reservoir reconstruction appliance according to claim 2, wherein: the hydraulic nozzle is installed on the drill bit (7), the reservoir is cut mainly through high-pressure water jet in the drilling process, the drilling speed is accelerated, the check valve is installed at the left end of the drill bit (7), it is ensured that drilling fluid can smoothly flow to the right end from the left end of the drill bit (7), and high-pressure slurry cannot flow back to the interior of the reformer from the right end of the drill bit (7) in the grouting process.
4. A use method of a marine natural gas hydrate reservoir transformation appliance is characterized by comprising the following steps: the method comprises the following steps:
s1, firstly, the guide shoe (1) is put down to a preset depth along with the drill rod, and the guide shoe is well arranged in an inclined direction and fixed;
s2, sequentially assembling the deflecting drill rod (2), the hydraulic packer (3), the high-pressure grouting nipple (4), the wireless inclinometer nipple (5) while drilling, the single-bending screw motor (6) and the drill bit (7), and lowering the deflecting drill rod to the guide shoe (1);
s3, pumping drilling fluid into an inner hole of the deflecting drill rod (2), starting to implement directional deflecting drilling, transmitting a drilling track to a drilling ship in real time through a wireless while-drilling deflecting nipple (5), adjusting well deflection and an azimuth angle by adopting a mode of composite drilling of a deflecting drill rod and a single-bent screw motor, and enabling a hydraulic packer (3) to be not inflated and expanded in the process;
s4, after the reservoir reformer drills into a target reservoir, stopping rotating the drilling tool and pumping drilling fluid, and pulling the reservoir reformer back for a certain distance to ensure that a sliding sleeve (4-2) of a high-pressure grouting short section (4) extends out for a sufficient distance, then injecting a pad fluid into a hole to replace slurry in the hole, then throwing a steel ball from a wellhead, pumping grouting fluid, accelerating to push the steel ball to fall into the high-pressure grouting short section (4), when the steel ball falls into a steel ball seat (4-4) of the high-pressure grouting short section (4), and plugging a channel, gradually increasing the pressure of the grouting fluid, when the starting pressure of a hydraulic packer (3) is reached, expanding the hydraulic packer (3) and tightly jointing with a well wall to form a closed space from the hydraulic packer (3) to a drill bit (7), and at the moment, continuously increasing the pressure of the grouting fluid, until a shearing pin (4-1) of the high-pressure grouting short section (4) is cut off, a sliding sleeve (4-2) in the high-pressure grouting short section (4) is pushed to extend out, a grouting hole (4-3) on the sliding sleeve is enabled to be exposed, high-pressure grouting liquid flows into a gap between the reformer and a well wall, and is finally injected into a reservoir under continuously increased pressure, so that the strength and the permeability of the reservoir are improved;
s5, after grouting, removing pressure from a grouting pump at the wellhead, recovering the original outer diameter of the hydraulic packer, and lifting the reservoir stratum modifier from the directional well, thereby completing stratum modification of one area, completing stratum modification of a large area by reciprocating, and realizing the improvement of the strength and permeability of the marine hydrate reservoir stratum.
5. The use method of a marine natural gas hydrate reservoir reconstruction tool according to claim 4, wherein the use method comprises the following steps: the specific flow path of the drilling fluid in the step S3 is: the method comprises the steps of (1) central hole of a deflecting drill rod (2) → a hydraulic packer (3) central hole → a high-pressure grouting short section (4) central hole → a wireless measurement while drilling short section (5) inner hole → a single-bending screw motor (6) → central hole outflow of a drill bit (7) → annular gap between a reservoir reformer and a well wall → gap between the deflecting drill rod and a casing inner hole → a well head.
6. The use method of a marine natural gas hydrate reservoir reconstruction tool according to claim 4, wherein the use method comprises the following steps: the specific flow path of the grouting liquid in step S4 is: a central hole of a deflecting drill rod (2) → a central hole of a hydraulic packer (3) → a central hole of a high-pressure grouting nipple (4) → a grouting hole of the high-pressure grouting nipple (4) → an annular gap (from the hydraulic packer to a drill bit part) between a reservoir reformer and a well wall → a hydrate reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010400349.XA CN111535743B (en) | 2020-05-13 | 2020-05-13 | Marine natural gas hydrate reservoir transformation appliance and use method thereof |
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| CN202010400349.XA CN111535743B (en) | 2020-05-13 | 2020-05-13 | Marine natural gas hydrate reservoir transformation appliance and use method thereof |
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| CN111535743B CN111535743B (en) | 2022-01-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027338A (en) * | 2021-02-20 | 2021-06-25 | 广州海洋地质调查局 | Simple small pressure difference testing device with well drilling, well completion and gas testing functions |
| CN114293914A (en) * | 2021-12-31 | 2022-04-08 | 洲际海峡能源科技有限公司 | Whipstock and well drilling and completion device for multi-bottom well |
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| CN110566118A (en) * | 2019-09-09 | 2019-12-13 | 中煤科工集团西安研究院有限公司 | Advanced grouting transformation method for combined directional hole of underground deep-buried aquifer bottom plate of coal mine |
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2020
- 2020-05-13 CN CN202010400349.XA patent/CN111535743B/en active Active
Patent Citations (5)
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| CN106761589A (en) * | 2017-01-03 | 2017-05-31 | 中国石油大学(北京) | A kind of method of Gas Hydrate In Sea Areas reservoir reconstruction exploitation |
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| CN108180001A (en) * | 2018-01-19 | 2018-06-19 | 吉林大学 | The method that ocean shale flour sand type gas hydrates reservoir is transformed in foam slip casting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113027338A (en) * | 2021-02-20 | 2021-06-25 | 广州海洋地质调查局 | Simple small pressure difference testing device with well drilling, well completion and gas testing functions |
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| CN114293914B (en) * | 2021-12-31 | 2023-12-19 | 洲际海峡能源科技有限公司 | Whipstock for multi-bottom well and well drilling and completion device |
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| Publication number | Publication date |
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| CN111535743B (en) | 2022-01-25 |
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