CN104806197A - Vibration well cementation system and method - Google Patents
Vibration well cementation system and method Download PDFInfo
- Publication number
- CN104806197A CN104806197A CN201510194334.1A CN201510194334A CN104806197A CN 104806197 A CN104806197 A CN 104806197A CN 201510194334 A CN201510194334 A CN 201510194334A CN 104806197 A CN104806197 A CN 104806197A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- explosive
- liquid
- vibration
- detonation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002360 explosive Substances 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000005474 detonation Methods 0.000 claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 29
- 239000012530 fluid Substances 0.000 claims description 12
- 230000003111 delayed effect Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000010276 construction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 239000003999 initiator Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012546 transfer Methods 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
- 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
- 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 provides a vibration cementing system, comprising: the casing pipe can be put into a preset position in an oil and gas well, an annulus is formed between the casing pipe and the well wall of the oil and gas well, and the annulus is used for containing cement paste and liquid contained in the casing pipe; an explosive suspended in the liquid, the liquid being capable of transmitting vibrations generated upon detonation of the explosive to the casing and the cement slurry. The invention also provides a method for cementing wells by using the vibration cementing system, which comprises the following steps of putting a casing pipe into a preset position in an oil-gas well, wherein an annulus is formed between the casing pipe and the wall of the oil-gas well; injecting cement slurry into the annulus; injecting a liquid into the cannula; (ii) inserting an explosive into the liquid; controlling the detonation of the explosive. According to the invention, by adopting explosive detonation as a vibration source, the dynamic load acting force generated by the detonation is strong, the vibration effect of the casing and the cement paste outside the casing is more obvious, and the well cementation quality is improved.
Description
Technical field
The invention belongs to oil gas development technology field, particularly relate to a kind of vibration cementing system and method.
Background technology
Well cementation is one of key link of drilling engineering, is a kind of quality improving environment in Well Completion Engineering of Oil Reservoirs; Cementing quality has important function for prolongation Oil/gas Well life-span and performance Oil & Gas Productivity.
Vibration cementing is at setting of casing, note ash, replaces and wait in solidifying process, adopts mechanical oscillation, hydraulic pressure or the means such as air pulse, hydraulic blow, produces effect of vibration improves a cementing quality technology in sleeve pipe, drilling fluid and cementing fluid.Facts have proved, vibration can improve cement strength, reduces drilling fluid viscosity and improves displacement efficiency, eliminate the bubble in cement slurry, form intact cement sheath; Can also curing time be shortened, prevent the oil after cementing the well, gas, water from mixing and altering, be conducive to the cementing strength improving interface, effectively improve cementing quality.
But existing vibration cementing technology also exists the more weak problem of oscillation intensity.To study and to try out waterpower pulse vibration cementing system the most widely at present, this vibration cementing system is generally arranged on above casing shoe, as the part of bunch tube with sleeve pipe G.I.H, in well-flushing, cementing, replacement cement paste process, rely on the impact force of working fluid in sleeve pipe, the flow section at its position place of periodic change produces action of periodically damming, and then produces periodic exciting force, realizes well cementation object.Cement slurry returns in process, because it is to the continuous erosion of sleeve bottom, even if do not use waterpower pulse vibrating device, the displacement efficiency of cement slurry near sleeve bottom and cementing quality also can effectively be ensured.And in the middle part of sleeve pipe and top is due to away from this vibrating device, these positions are only the main effective object of device of excitation, because waterpower pulse vibrating device is arranged on usually on the sleeve pipe at position, shaft bottom, its vibration produced is decaying gradually along in sleeve pipe upload procedure, make in the middle part of sleeve pipe and the interval isolation oscillation intensity on top weakens, thus affect cementing quality.
Summary of the invention
There is the more weak problem of intensity for existing vibration cementing technology, the invention provides a kind of vibration cementing system and method, its technical scheme is as follows:
A kind of vibration cementing system, comprising:
Can be lowered into the sleeve pipe in precalculated position in Oil/gas Well, form annular space between the borehole wall of described sleeve pipe and described Oil/gas Well, described annular space is used for accommodating cement paste;
Be placed in the liquid in described sleeve pipe;
Be suspended in the explosive in described liquid, the vibration passing that produces during described explosive detonation can be given described sleeve pipe and cement paste by described liquid.
Vibration cementing system as above, comprising: the cable be connected with the cartridge bag of described explosive, and described explosive is suspended in described liquid by described cable, and described cable is for controlling described explosive initiation.
Vibration cementing system as above, described explosive is positioned in the middle part of the fluid column of liquid formation.
Vibration cementing system as above, comprises plug, and described plug is arranged on the end of described sleeve pipe away from described Oil/gas Well well head.
Utilize above-mentioned vibration cementing system to carry out a vibration cementing method, comprise the following steps:
Sleeve pipe is lowered into precalculated position in Oil/gas Well, between the borehole wall of described sleeve pipe and described Oil/gas Well, forms annular space;
Cement paste is injected in described annular space;
Liquid is injected in described sleeve pipe;
Explosive is entered under in described liquid;
Control described explosive detonation.
Vibration cementing method as above, by the radial dimension being less than described sleeve pipe that the cartridge bag radial dimension of described explosive is arranged, thus make to form decoupling charge structure between described explosive and described sleeve pipe, its coefficient of decoupling charge is determined according to the internal pressure strength of described sleeve pipe.
Vibration cementing method as above, the safe equivalent of described explosive is determined according to the internal pressure strength of described sleeve pipe.
Vibration cementing method as above, adopts delayed ignition mode, controls the interval detonation on schedule of described explosive.
Vibration cementing method as above, described predetermined time interval is determined according to the type of described explosive and coefficient of decoupling charge.
Vibration cementing method as above, described cement paste is first injected in sleeve pipe, under in described sleeve pipe, enter plug, then injects liquid in described sleeve pipe, and described liquid pushing tow described plug, thus is replaced in described annular space by the cement paste in sleeve pipe.
By above technical scheme, beneficial effect of the present invention is:
By adopting explosive detonation as vibration source, the Dynamic Loading power that detonation produces is strong, and the vibrating effect of sleeve pipe and outside tube water slurry body is more obvious, and cementing quality improves;
In a preferred approach, decoupling charge structure is formed between explosive and sleeve pipe, liquid in sleeve pipe is as not couplant (accumulation of energy medium), the part energy that the detonation starting stage produces can be stored with the form of kinetic energy and potential energy, weaken the initial pressure peak directly acted on casing wall, then pressure fluid again by the fault offset that stores out, effectively extends the action time of detonation load to sleeve pipe and outside tube water slurry body;
In addition, explosive is placed in liquid, the detonation energy that explosive produces, by this homogeneous fluid of liquid produce radially with the cylindrical wave of axis, uniform load on casing wall, and then transmits and acts on the cement slurry outside sleeve pipe, thus makes vibration more even;
Moreover, a kind of vibration cementing system and method for the present invention cancels the vibrating device adopted in existing vibration cementing technology, overall structure is simple and easy, easy to operate, reduce the down-hole caused because of vibrating device inefficacy or fault and add construction operation, thus making construction become simple, input cost also reduces greatly;
In practical operation, can according to operating mode needs, by adjustment explosive depth of setting, flexible grasp effect well section, both can whole section of vibration also can local vibration; And by delayed ignition mode, control explosive interval to schedule, point several times detonation, thus produce periodic vibration wave and liquid fluctuating, strengthening vibrating effect, shortens construction period.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of vibration cementing system of embodiment of the present invention;
Fig. 2 is the flow chart of a kind of vibration cementing method of embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1.A kind of vibration cementing system, comprising: the sleeve pipe 13 that can be lowered into precalculated position in Oil/gas Well, form annular space 15 between described sleeve pipe 13 and the borehole wall 11 of described Oil/gas Well, described annular space 15, for accommodating cement paste 17, is equipped with liquid 19 in described sleeve pipe 13; Be suspended in the explosive 21 in described liquid 19, the vibration passing that produces during described explosive 21 detonation can be given described sleeve pipe 13 and cement paste 17 by described liquid 19.
In present embodiment, explosive detonation produces high pressure instantaneously and discharges a large amount of energy, and detonation energy directly acts on the liquid around it with the form of shock wave.Liquid, by the impact of detonation stress wave, can cause the high vibration (accumulation of energy) of himself on the one hand; Reflection and transmission can be produced at the intersection of detonation product and liquid simultaneously, energy continues to reach sleeve pipe by transmitted wave, cause cover tube vibration, and again occur to reflect and transmission effect at liquid and sleeve pipe intersection, further detonation energy is passed to outside tube water mud, causes the vibration of outside tube water slurry body.Back wave acts on liquid after reflection again, causes liquid vibration, and this vibration will act on sleeve pipe and outside tube water slurry body again.In whole process, detonation energy passes through transmission direct effect and the reflection indirectly-acting of detonation stress wave, and the liquid around it, sleeve pipe and outside tube water slurry body transmit, thus cause the vibration of sleeve pipe and outside tube water mud, reach the order of vibration cementing.
Present embodiment does not have special requirement to described liquid, and during practical engineering application, the aqueous water adopted nearby, the fracturing fluid with certain viscosity all can meet the demands.
Present embodiment uses and controls the cable of explosive initiation and the affixed mode of explosive cartridge bag, and be lowered into by explosive in the liquid in sleeve pipe, explosive is suspended in liquid by cable; Preferably be placed on the middle part of the fluid column that liquid is formed, the energy that explosive detonation produces can be made full use of like this.Present embodiment does not make special performance requirement to explosive yet, and it is the technological means of prior art comparative maturity that explosive detonates in a liquid.
Refer to Fig. 2.Embodiment of the present invention also provides a kind of and utilizes above-mentioned vibration cementing system to carry out the method for cementing the well, and comprises the following steps: sleeve pipe is lowered into precalculated position in Oil/gas Well, forms annular space between the borehole wall of described sleeve pipe and described Oil/gas Well; Cement paste is injected in described annular space; Liquid is injected in described sleeve pipe; Explosive is entered under in described liquid; Control described explosive detonation.
In present embodiment, the cartridge bag radial dimension of explosive is less than the radial dimension of sleeve pipe, thus make to form decoupling charge structure between explosive and sleeve pipe, liquid in sleeve pipe is as not couplant (accumulation of energy medium), the part energy of the generation of detonation starting stage can be stored with the form of kinetic energy and potential energy, weaken the initial pressure peak directly acted on casing wall.In addition, because liquid is by the percussion of detonation stress wave, liquid itself can obtain kinetic energy and potential energy, the rising of the liquid level meeting generating period of liquid and decline.By this transfer process, by the fault offset that stores before liquid out, and sleeve pipe and outside tube water mud can be loaded on, thus effectively improve the utilization rate of detonation energy, extend the time of vibration of sleeve pipe and outside tube water mud.
In order to simplify construction, present embodiment adopts the mode of positive cement injection, namely in the first sprue bushing of cement paste, plug is entered under in sleeve pipe, inject liquid (being referred to as displacement fluid) more wherein, liquid as displacement fluid has certain pressure, thus is clamp-oned by cement paste in the annular space that formed between sleeve pipe and the Oil/gas Well borehole wall.After annular space clamp-oned by cement paste, plug, by sleeve bottom shutoff, prevents the liquid in sleeve pipe from detonation process subsequently, infiltrating annular space because pressure increases instantaneously.
From the above, liquid level obtains periodically fluctuation and produces impact preferably to vibration.Therefore, present embodiment adopts delayed ignition mode, point several times detonation, thus produces periodic vibration wave and liquid fluctuating, and strengthening vibrating effect, the time interval of detonation is determined according to the type of explosive and coefficient of decoupling charge.
The specific works flow process of embodiment of the present invention is as follows;
(1) according to the length of effect well section, according to sleeve body yield strength, design blasting explosive secure equivalent, coefficient of decoupling charge;
(2) assemble cable priming device and initiator head, after assembling, check that initiator head wire is communicated with situation with shell;
(3) by payout under cable car, assign and mark on cable to predetermined level, trip out cable;
(4) replace after complete, bruising until cement paste, explosive, apparatus to cause bursting, cable are connected, by cable car, it is slowly transferred, stop transferring in time arriving assigned address;
(5) staff is away from well head, energising ignition charge;
(6) construct complete, trip out cable.
A kind of vibration cementing system and method for embodiment of the present invention cancels the vibrating device adopted in existing vibration cementing technology, overall structure is simple and easy, easy to operate, reduce the down-hole caused because of vibrating device inefficacy or fault and add construction operation, thus making construction become simple, input cost reduces greatly.
The main thought of embodiment of the present invention is that the energy by being produced by explosive detonation puts on sleeve pipe and outside tube water slurry body by liquid, realizes the vibration of sleeve pipe and outside tube water slurry body, thus reaches and improve cementing quality object.Owing to adopting the dangerous material that explosive this power is larger, the safety of therefore constructing is must not irrespective significant problem.Present embodiment mainly through designing the safe equivalent of explosive, these two parameters of coefficient of decoupling charge ensure safety, its numerical value is determined according to the internal pressure strength of sleeve pipe, does not limit at this to it.In practice of construction process, due to the difference of hole condition condition, two parameter configures accordingly, does not form the restriction to embodiment of the present invention.
In addition, the liquid in sleeve pipe is not only as accumulation of energy medium, also can play certain cushioning effect in the moment of explosive detonation, prevents the pressure peak produced instantaneously because of detonation from damaging sleeve pipe comparatively greatly, has certain contribution to safe construction.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (10)
1. a vibration cementing system, is characterized in that, comprising:
Can be lowered into the sleeve pipe in precalculated position in Oil/gas Well, form annular space between the borehole wall of described sleeve pipe and described Oil/gas Well, described annular space is used for accommodating cement paste;
Be placed in the liquid in described sleeve pipe;
Be suspended in the explosive in described liquid, the vibration passing that produces during described explosive detonation can be given described sleeve pipe and cement paste by described liquid.
2. vibration cementing system as claimed in claim 1, it is characterized in that comprising: the cable be connected with the cartridge bag of described explosive, described explosive is suspended in described liquid by described cable, and described cable is for controlling described explosive initiation.
3. vibration cementing system as claimed in claim 2, is characterized in that: described explosive is positioned in the middle part of the fluid column of liquid formation.
4. vibration cementing system as claimed in claim 1, it is characterized in that: comprise plug, described plug is arranged on the end of described sleeve pipe away from described Oil/gas Well well head.
5. utilize the vibration cementing system described in any one of claim 1 to 4 to carry out a vibration cementing method, it is characterized in that comprising the following steps:
Sleeve pipe is lowered into precalculated position in Oil/gas Well, between the borehole wall of described sleeve pipe and described Oil/gas Well, forms annular space;
Cement paste is injected in described annular space;
Liquid is injected in described sleeve pipe;
Explosive is entered under in described liquid;
Control described explosive detonation.
6. vibration cementing method as claimed in claim 5, it is characterized in that: the radial dimension being less than described sleeve pipe that the cartridge bag radial dimension of described explosive is arranged, thus make to form decoupling charge structure between described explosive and described sleeve pipe, its coefficient of decoupling charge is determined according to the internal pressure strength of described sleeve pipe.
7. vibration cementing method as claimed in claim 6, is characterized in that: the safe equivalent of described explosive is determined according to the internal pressure strength of described sleeve pipe.
8. vibration cementing method as claimed in claims 6 or 7, is characterized in that: adopt delayed ignition mode, control the interval detonation on schedule of described explosive.
9. vibration cementing method as claimed in claim 8, is characterized in that: described predetermined time interval is determined according to the type of described explosive and coefficient of decoupling charge.
10. vibration cementing method as claimed in claim 5, it is characterized in that: described cement paste is first injected in sleeve pipe, under in described sleeve pipe, enter plug, then inject liquid in described sleeve pipe, described liquid pushing tow described plug, thus is replaced in described annular space by the cement paste in sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194334.1A CN104806197B (en) | 2015-04-22 | 2015-04-22 | Vibration well cementation system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194334.1A CN104806197B (en) | 2015-04-22 | 2015-04-22 | Vibration well cementation system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104806197A true CN104806197A (en) | 2015-07-29 |
| CN104806197B CN104806197B (en) | 2017-09-15 |
Family
ID=53691350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510194334.1A Active CN104806197B (en) | 2015-04-22 | 2015-04-22 | Vibration well cementation system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104806197B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555566A (en) * | 2016-12-07 | 2017-04-05 | 中国石油集团西部钻探工程有限公司 | Frangible stratum or the cementing method on broken stratum |
| CN111305780A (en) * | 2020-02-24 | 2020-06-19 | 中国农业大学 | High-pressure gas impact vibration well cementation system and vibration method |
| CN112832718A (en) * | 2021-03-12 | 2021-05-25 | 西南石油大学 | Deep shale gas development method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137391C (en) * | 2001-06-06 | 2004-02-04 | 大庆油田有限责任公司勘探开发研究院 | Seismic blasthole cementing method |
| CN203756116U (en) * | 2013-12-31 | 2014-08-06 | 中国石油化工集团公司 | Vibration cementing device |
-
2015
- 2015-04-22 CN CN201510194334.1A patent/CN104806197B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555566A (en) * | 2016-12-07 | 2017-04-05 | 中国石油集团西部钻探工程有限公司 | Frangible stratum or the cementing method on broken stratum |
| CN111305780A (en) * | 2020-02-24 | 2020-06-19 | 中国农业大学 | High-pressure gas impact vibration well cementation system and vibration method |
| CN112832718A (en) * | 2021-03-12 | 2021-05-25 | 西南石油大学 | Deep shale gas development method |
| CN112832718B (en) * | 2021-03-12 | 2022-04-05 | 西南石油大学 | Deep shale gas development method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104806197B (en) | 2017-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20240110465A1 (en) | Cracking permeability increasing method combining hydraulic fracturing and methane in-situ combustion explosion | |
| CN103352684B (en) | Chemical Physics compound explosion fracturing equipment and manufacture method thereof | |
| CN106103888B (en) | Ignition mechanism with time delay and metering system | |
| US20090159282A1 (en) | Methods for Introducing Pulsing to Cementing Operations | |
| NO336269B1 (en) | A method for controlling an underbalance condition in a wellbore. | |
| US9714555B2 (en) | Method of plugging a well | |
| CN105464638A (en) | Coal bed gas well pulse radial drilling and double-pulsating hydrofracturing method | |
| CN203742544U (en) | Well cementing device for ultrasonically processing downhole hydraulic pulse coupled concrete slurry | |
| CN110965979B (en) | Deep combustion and explosion fracturing method in radial slim hole | |
| US4049056A (en) | Oil and gas well stimulation | |
| RU2600249C1 (en) | Method and device of impact on oil-saturated formations and bottomhole zone of horizontal well | |
| CN104806197A (en) | Vibration well cementation system and method | |
| CN104975838B (en) | A kind of method for preventing high enegry gas fracturing existing crack from closing | |
| WO2014168699A2 (en) | Controlling pressure during perforating operations | |
| US6732799B2 (en) | Apparatus for stimulating oil extraction by increasing oil well permeability using specialized explosive detonating cord | |
| OA12106A (en) | Method of improving the permeability of an earth formation. | |
| CN108915661B (en) | Deflagration fracturing downhole experiment method for open hole well | |
| CN102619496B (en) | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock | |
| CN107288606A (en) | A kind of method of artificial construction hot dry rock heat reservori | |
| CN113338873B (en) | Shale gas reservoir multilateral well detonation pressure enhanced extraction method | |
| JP2009168374A (en) | Smooth blasting construction method | |
| CN104373093A (en) | Underground nitrogen-making induced flow completion pipe string having pressure monitoring function | |
| RU2471064C2 (en) | Method of thermal impact at bed | |
| CN104265250A (en) | Rapid induced flow completion pipe column for subsurface nitrogen making gas well | |
| CN104265251A (en) | Nitrogen making induced flow device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |