CN108843274A - Water-jet spinning drag bit and carbon dioxide injection well de-plugging process - Google Patents
Water-jet spinning drag bit and carbon dioxide injection well de-plugging process Download PDFInfo
- Publication number
- CN108843274A CN108843274A CN201810684308.0A CN201810684308A CN108843274A CN 108843274 A CN108843274 A CN 108843274A CN 201810684308 A CN201810684308 A CN 201810684308A CN 108843274 A CN108843274 A CN 108843274A
- Authority
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- China
- Prior art keywords
- water
- frozen block
- drag bit
- carbon dioxide
- jet spinning
- Prior art date
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000009987 spinning Methods 0.000 title claims abstract description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 23
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000009527 percussion Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000003814 drug Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 5
- 210000004907 gland Anatomy 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000013467 fragmentation Methods 0.000 abstract 1
- 238000006062 fragmentation reaction Methods 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
Landscapes
- 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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of water-jet spinning drag bit and carbon dioxide injection well de-plugging process, solve the problems, such as that current frozen block processing mode speed is slow, costly and complicated for operation；Pass through water-jet spinning drag bit injection heating pressurized fluid, frozen block layer is crushed by the percussion that the heat of injection fluid melts effect, the fragmentation of drag bit and injection fluid, is dissolved, achieve the purpose that de-plugging, bore the blocking layer section that thaws, broken frozen block object clast is carried out pit shaft by the circulatory system in time simultaneously, guarantees working continuously for the device.After frozen block occurs for carbon dioxide injection well, the drill bit and technique have the advantages that easy to operate, construction cost is low, have a wide range of application, and provide safeguard for the large-scale application of carbon dioxide flooding oil tech.
Description
Technical field
The present invention relates in the carbon dioxide injection well of Eor By Gas Injection, because natural gas contacts the hydrate to be formed with water
And other substances generate frozen block phenomenon in underground, to solve the problems, such as method for removing blockage used by the frozen block.
Background technique
At present for the exploitation of low-permeability oil deposit, it is difficult to adopt waterflooding extraction to supplement stratum energy, therefore part oil field
The development scheme of carbon dioxide injection is taken, and single carbon dioxide injection will cause serious has channeling after producing a period of time and show
As water alternating gas injection can greatly reduce the generation of this situation.But carbon dioxide injection well can produce if stopping note in underground
Raw frozen block phenomenon, according to investigations, the grand celebration block carbon dioxide injection well frozen block time is up to 168 days, seriously affects gas injection development effect
Fruit, it is suppressed that extensive use of the gas injection development in oil field.
For gas injection well hydrate frozen block phenomenon, non-mechanical processing method has heating, voltage drop method, chemical-agent technique
Deng.Since frozen block section is concentrated mainly in pit shaft, and the injection tripping in the annular space of oil pipe and casing to guarantee gas
Packer.Therefore general processing method is to inject the medicament of high temperature, makes pharmacy effect in frozen block using gravitational settling effect
Band, while the heat that medicament carries acts on frozen block band to accelerate the decomposition of hydrate.Not only processing speed is slow for this method, and
Medicament waste is more serious.In addition there are the methods of injection high-temperature steam to force to melt hydrate, but such method expense compared with
Height, and De-plugging speed is slow.And mechanical processing method has generally required out well head and oil pipe, material resources of employing a tremendous amount of manpower.
Summary of the invention
In view of this, the present invention provides a kind of water-jet spinning drag bit, and provides and infused using the drill bit
The technique of carbon dioxide well de-plugging solves the problems, such as that current frozen block processing mode speed is slow, costly and complicated for operation.
In a first aspect, a kind of water-jet spinning drag bit is provided, for the frozen block in de-plugging carbon dioxide injection well
Object, including：
Rotary shaft；
Connection spin rotation mechanism and drag bit in the rotary shaft；
There is helical flow path in the rotary shaft；
The spiral liquid flow of the helical flow path conveying impacts the spin rotation mechanism rotation；
The spin rotation mechanism rotation, drives the drag bit to cut the frozen block object.
Preferably, the spin rotation mechanism, including：
Ontology, the ontology and the rotation axis connection；
There is blade wheel structure in the ontology；
The blade wheel structure is generated rotation torque by the percussion of the spiral liquid flow；
The rotation torque drives the rotary shaft to rotate.
Preferably, the helical flow path, is made of pipe with spiral pipe, and the pipe with spiral pipe is fixed in the rotary shaft.
Preferably, the water-jet spinning drag bit further includes：
Outer cylinder；
The rotary shaft is fixed on the outer cylinder center by bearing；
The outer cylinder bottom end connects gland.
Second aspect provides a kind of carbon dioxide injection well de-plugging process, including：
（1）, from well head by the water-jet spinning drag bit as described above being detachably connected with connecting tube be sent into oil pipe
Internal frozen block layer；
（2）, into the helical flow path of the water-jet spinning drag bit inject fluid under pressure；
（3）, the fluid under pressure drive the scraper of the drill bit to cut to creep into the frozen block layer, and to forming the frozen block layer
Frozen block object generates jet impingement function, and hydraulic fracture simultaneously dissolves the frozen block object；
（4）, the frozen block object clast with annular space of the fluid under pressure between the oil pipe and the connecting tube to return row logical
Cross the wellhead assembly.
Preferably, the fluid under pressure is hot water.
Preferably, the connecting tube, including：
Inner tube；
Said inner tube radially successively has steel wire winding layer, rubber middle layer and metal shell from inside to outside；
Hose is cased with outside said inner tube；
The hose is made of several hose single-units；
The hose single-unit is sequentially connected on longitudinal direction and constitutes the hose；
The hose nipple for guaranteeing that the hose can be bent winding, and keeps the intensity of the connecting tube.
Preferably, the connecting tube lower end is connected with hydraulic variable diameter centralizer；
The hydraulic variable diameter centralizer, ontology are cylinder, and reset element is arranged on the outer wall of the ontology；
During the connecting tube and the water-jet spinning drag bit tripping in, the reset element is set back in described
In ontology, the connecting tube and the water-jet spinning drag bit pass through the well head；
When injecting fluid under pressure, the reset element is stretched out and is supported on the inner wall of the oil pipe, connecting tube described in righting
And the water-jet spinning drag bit tripping in is to the frozen block layer.
Preferably, the carbon dioxide injection well de-plugging process also has pressurization water circulation system, the pressure (hydraulic) water cyclic system
System, including water treatment facilities, heating mechanism and pumping mechanism；
The water treatment facilities, the clast for passing through the frozen block object of the well head for removing the row of returning；
The heating mechanism, the heat treatment for pressure (hydraulic) water in the water treatment facilities；
The pumping mechanism, for establishing circulating for the pressure (hydraulic) water.
Preferably, the carbon dioxide injection well de-plugging process, can also be added medicament.
Beneficial effects of the present invention：
1. being used instead of a large amount of medicament of conventional method；Based on the mechanically broken hydrate of the technique, thermodynamic cycle auxiliary
De-plugging, without the input cost in terms of medicament.
2. saving the activity duration；Mechanical means and non-mechanical approach are used in combination the technique, make high-temp liquid through revolving
Turn drill bit to be injected on hydrate, while rotary drilling-head plays the role of Mechanical Crushing, hydrate can be made quickly to be broken decomposition,
The activity duration is greatly saved.
3. construction is simple convenient；In the construction process without re-establishing derrick, especially for complicated landform（High mountain,
Hilly country）, large-scale workover treatment is avoided, need to only utilize the equipment such as high-pressure hose Operation Van can implementing process.Together
When, which can carry out under conditions of not playing out well head, only high-pressure hose and drill bit need to be lowered into oil by wellhead assembly
Guan Zhong, aggravating liquid pump note by high-pressure pump, drilling function can be realized at drill bit, effectively simplify construction procedure.
4. high construction efficiency is controllable；There is drawbacks in medicament transportation aspect for traditional well head dosing method, such as：Medicament settled
There is loss in journey, only cannot occur effectively to contact with frozen block layer by gravitational settling medicament, cause de-plugging efficiency extremely low.The dress
It sets and pressurized aqueous solution is delivered directly to by frozen block band by high-pressure hose, keep de-plugging operation efficiently controllable, avoid pit shaft dosing
Anticaustic and problem of environmental pollution.
5. strengthening heating power plugging removal effect；Traditional dosing method directly injects high temperature medicament in well head, flows through oil in medicament
Pipe can generate a large amount of thermal loss during reaching frozen block band, and heating power plugging removal effect is made to have a greatly reduced quality.The device passes through height
Hose is pressed to transmit high-temp liquid, the frozen block that can go directly band, thermal loss is small, and heating power de-plugging is high-efficient.
Detailed description of the invention
By the description below with reference to attached drawing to the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage is apparent, in the accompanying drawings：
Fig. 1 is the carbon dioxide injection well de-plugging process device usage state diagram of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the water-jet spinning drag bit of the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the connecting tube of the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of the hydraulic variable diameter centralizer of the embodiment of the present invention.
Fig. 5 is the reset element of the hydraulic variable diameter centralizer of the embodiment of the present invention and the assembling schematic diagram of ontology.
Specific embodiment
Below based on embodiment, present invention is described, but it is worth noting that, the present invention is not limited to these realities
Apply example.It is detailed to describe some specific detail sections below in datail description of the invention.However, for not detailed
The present invention can also be understood completely in the part described to the greatest extent, those skilled in the art.
In addition, it should be understood by one skilled in the art that provided attached drawing simply to illustrate that the purpose of the present invention,
Feature and advantage, attached drawing are not to be actually drawn to scale.
Meanwhile unless the context clearly requires otherwise, "include", "comprise" etc. otherwise throughout the specification and claims
Similar word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being " including but not limited to "
Meaning.
Fig. 2 is the structural schematic diagram of the water-jet spinning drag bit of the embodiment of the present invention.As shown in Figure 2：It is a kind of
Water-jet spinning drag bit, including rotary shaft 12；12 lower part of rotary shaft is screwed drag bit 17；Rotary shaft
It is also connected with spin rotation mechanism 15 on 12, also there is helical flow path in rotary shaft 12；Fluid under pressure is conveyed into helical flow path, in spiral shell
Spiral liquid flow is generated in eddy flow road, spiral liquid flow impact spin rotation mechanism 15 rotates；The rotation of rotation mechanism 15 of spinning drives rotary shaft
12 rotations, rotary shaft 12 further drive the frozen block object of 17 rotary cutting frozen block layer of drag bit.
Further, in Fig. 2, spin rotation mechanism 15, including ontology, the ontology are connect with rotary shaft 12；Tool in ontology
There is blade wheel structure 16, blade wheel structure 16 is generated rotation torque by the percussion of spiral liquid flow, and rotation torque drives rotary shaft
12 rotations.
Further, in Fig. 2, helical flow path is made of pipe with spiral pipe 13, and pipe with spiral pipe 13 is fixed in rotary shaft 12
Portion.
Further, in Fig. 2, water-jet spinning drag bit, further includes outer cylinder, in outer cylinder 10 and rotary shaft 12
Between cross keyway to realize fixation, and bearing is respectively set between rotary shaft 12 and outer cylinder 10 and the contact surface of gland 14
11, realize that rotary shaft 12 rotates by bearing 11, outer cylinder 10 and gland 14 are connected through a screw thread.
Fig. 3 is the structural schematic diagram of the connecting tube of the embodiment of the present invention.As shown in Figure 3：Connecting tube is by inner tube 18 and covers
Several hose single-units 19 composition of 18 outside of inner tube.Wherein inner tube 18 radially successively has steel wire winding layer, rubber from inside to outside
Glue middle layer and metal shell.Docking structure is set between adjacent two hoses single-unit 19, and all hose single-units 19 constitute whole after docking
The hose of body, the hose is for bearing high pressure, protection inner tube 18.
Fig. 4 is the structural schematic diagram of the hydraulic variable diameter centralizer of the embodiment of the present invention.As shown in Figure 4：Hydraulic variable diameter
The ontology of centralizer is cylindrical shape, and card slot is arranged on the outer wall of ontology, reset element 20 is housed inside card slot.
Further, in Fig. 5, reset element 20 is packed into card slot by flat key, and reset element 20 is stuck on card slot can be left
Right sliding.There are difference, connecting tube lower part connects hydraulic variable diameter centralizer for diameter and oil pipe inside diameter at head valve,
When by the small head valve of diameter, reset element 20 bounces back, and connecting tube passes through head valve；In the tripping in process of connecting tube
Middle centralizer is closed, and reset element 20 is opened when injecting fluid under pressure, is supported on tube inner wall, righting connecting tube, it is ensured that even
Take over steady tripping in.
Specifically, in conjunction with attached drawing 1-5, construction technology process of the invention is described in detail：
Connecting tube 3 is sent into frozen block layer position 9 inside oil well by 4 upper end of well head by Operation Van 1, is installed additional and is sealed in 4 upper end of well head
Rubber ring（Cushion rubber need to be cooperatively connected 3 size of pipe）.3 bottom of connecting tube and water-jet spinning drag bit 8 are connected by screw thread
It connects, and is cased with hydraulic variable diameter centralizer 7 in connecting tube 3, the hydraulic drive reducing centralizer 7 during the tripping in of oil pipe
In reset element end is moved in card slot, be supported on external oil pipe inner wall, make the steady tripping in of connecting tube 3.
The pressurized aqueous solution after heating is pumped into connecting tube 3 by electric pump, finally reaches water-jet spinning scraper
Drill bit 8.When water jets under high pressure in connecting tube 3 flows through in water-jet spinning drag bit 8, due to fixed in rotary shaft 12
Pipe with spiral pipe 13, make water jets under high pressure in pipe with spiral pipe 13 spiral flow out, generate centrifugal force, the centrifugal force can auxiliary impact from
Blade wheel structure 16 in rotating mechanism 15 generates rotation torque, and rotation torque drives rotary shaft 12 and scrapes with what rotary shaft 12 was connect
Knife drill bit 17 independently rotates, drill scraper cutting drilling frozen block layer 9, meanwhile, hydrate of the high temperature and high speed liquid to frozen block layer（Freeze
Stifled object）Generate jet impingement function, hydraulic fracture hydrate（Frozen block object）, while by hydrate（Frozen block object）Clast washes away.It bores
Into hydrate in the process（Frozen block object）With pressurized aqueous solution, the annular space between oil pipe and connecting tube 3 returns out through well head 4 clast.
The water phase for returning discharge is collected in waste liquid pool 6, is flowed through water pipe 2 and is reached water treatment facilities 5, at water treatment facilities 5
It is recycled to after reason in the water tank in Operation Van 1.
After completing de-plugging, upper water lift power is injected from rotary drag bit 8 to 4 total valve of well head or more, will in surface shut-in
Water-jet spinning drag bit 8 is taken out by well head upper end, and carbon dioxide injection well can put into normal use.
Embodiment described above is only to express embodiments of the present invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that those skilled in the art,
Under the premise of not departing from present inventive concept, several deformations, same replacement can also be made, improved etc., these belong to the present invention
Protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of water-jet spinning drag bit, for the frozen block object in de-plugging carbon dioxide injection well, which is characterized in that packet
It includes：
Rotary shaft；
Connection spin rotation mechanism and drag bit in the rotary shaft；
There is helical flow path in the rotary shaft；
The spiral liquid flow of the helical flow path conveying impacts the spin rotation mechanism rotation；
The spin rotation mechanism rotation, drives the drag bit to cut the frozen block object.
2. water-jet spinning drag bit according to claim 1, which is characterized in that the spin rotation mechanism, packet
It includes：
Ontology, the ontology and the rotation axis connection；
There is blade wheel structure in the ontology；
The blade wheel structure is generated rotation torque by the percussion of the spiral liquid flow；
The rotation torque drives the rotary shaft to rotate.
3. water-jet spinning drag bit according to claim 1, it is characterised in that：
The helical flow path, is made of pipe with spiral pipe, and the pipe with spiral pipe is fixed in the rotary shaft.
4. water-jet spinning drag bit according to claim 1, which is characterized in that further include：
Outer cylinder；
The rotary shaft is fixed on the outer cylinder center by bearing；
The outer cylinder bottom end connects gland.
5. a kind of carbon dioxide injection well de-plugging process, including：
（1）, from well head will with connecting tube be detachably connected power 1-4 in it is any as described in water-jet spinning drag bit
It is sent into frozen block layer inside oil pipe；
（2）, into the helical flow path of the water-jet spinning drag bit inject fluid under pressure；
（3）, the fluid under pressure drive the scraper of the drill bit to cut to creep into the frozen block layer, and to forming the frozen block layer
Frozen block object generates jet impingement function, and hydraulic fracture simultaneously dissolves the frozen block object；
（4）, the frozen block object clast with annular space of the fluid under pressure between the oil pipe and the connecting tube to return row logical
Cross the wellhead assembly.
6. a kind of carbon dioxide injection well de-plugging process according to claim 5, which is characterized in that the connecting tube, including：
Inner tube；
Said inner tube radially successively has steel wire winding layer, rubber middle layer and metal shell from inside to outside；
Hose is cased with outside said inner tube；
The hose is made of several hose single-units；
The hose single-unit is sequentially connected on longitudinal direction and constitutes the hose；
The hose nipple for guaranteeing that the hose can be bent winding, and keeps the intensity of the connecting tube.
7. a kind of carbon dioxide injection well de-plugging process according to claim 5, it is characterised in that：
The connecting tube lower end is connected with hydraulic variable diameter centralizer；
The hydraulic variable diameter centralizer, ontology are cylinder, and reset element is arranged on the outer wall of the ontology；
During the connecting tube and the water-jet spinning drag bit tripping in, the reset element is set back in described
In ontology, the connecting tube and the water-jet spinning drag bit pass through the well head；
When injecting fluid under pressure, the reset element is stretched out and is supported on the inner wall of the oil pipe, connecting tube described in righting
And the water-jet spinning drag bit tripping in is to the frozen block layer.
8. a kind of carbon dioxide injection well de-plugging process according to claim 5, it is characterised in that：
The fluid under pressure passes through pressurization water circulation system injection；
The pressurization water circulation system, including water treatment facilities, heating mechanism and pumping mechanism；
The water treatment facilities, the clast for passing through the frozen block object of the well head for removing the row of returning；
The heating mechanism, the heat treatment for pressure (hydraulic) water in the water treatment facilities；
The pumping mechanism, for establishing circulating for the pressure (hydraulic) water.
9. according to a kind of carbon dioxide injection well de-plugging process any in claim 5-8, it is characterised in that：
Medicament is additionally added in the frozen block layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684308.0A CN108843274B (en) | 2018-06-28 | 2018-06-28 | Hydraulic jet self-rotating scraper bit and carbon dioxide injection well blockage removal process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684308.0A CN108843274B (en) | 2018-06-28 | 2018-06-28 | Hydraulic jet self-rotating scraper bit and carbon dioxide injection well blockage removal process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843274A true CN108843274A (en) | 2018-11-20 |
| CN108843274B CN108843274B (en) | 2022-07-29 |
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| CN201810684308.0A Active CN108843274B (en) | 2018-06-28 | 2018-06-28 | Hydraulic jet self-rotating scraper bit and carbon dioxide injection well blockage removal process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635668A (en) * | 2022-02-22 | 2022-06-17 | 中石化石油工程技术服务有限公司 | Tool and method for safely punching and scraping oil pipe |
| CN118653783A (en) * | 2024-08-14 | 2024-09-17 | 兰州城市学院 | Shale gas extraction equipment, shale gas extraction method and application of shale gas extraction equipment and shale gas extraction method in shale exploitation |
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