CN105507814B - Water-jet drilling equipment and its process are conveyed for coal bed gas well coiled tubing - Google Patents
Water-jet drilling equipment and its process are conveyed for coal bed gas well coiled tubing Download PDFInfo
- Publication number
- CN105507814B CN105507814B CN201610044371.9A CN201610044371A CN105507814B CN 105507814 B CN105507814 B CN 105507814B CN 201610044371 A CN201610044371 A CN 201610044371A CN 105507814 B CN105507814 B CN 105507814B
- Authority
- CN
- China
- Prior art keywords
- water
- jet
- coiled tubing
- pressure
- drilling
- 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.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
It is used for coal bed gas well coiled tubing the invention discloses one kind and conveys water-jet drilling equipment and its process, including ground applications of coiled tubing unit and water-jet bore hole tool assembly；Ground applications of coiled tubing unit includes applications of coiled tubing unit, lubricator, control head and servicing unit；Servicing unit includes fluid reservoir, high-pressure pump and ickings processing system；Water-jet bore hole tool assembly includes coiled tubing connector, safe releasing device, ball-and-seat, steering gear and the water-jet head being sequentially connected from top to bottom；Using above-mentioned water-jet drilling equipment and its process, the problem of being turned in the past by whipstock is solved, construction cost is reduced；And high-pressure jet beam is used in different directions and the different depth injection in coal seam, realizes multilayer position, with many wells drillings in layer position, to increase length, expansion sweep area, raising gas yield of the well in bed gas reservoir, significant is increased production to bed gas reservoir.
Description
Technical field
The present invention relates to cbm development technical field, more particularly to a kind of coal bed gas well coiled tubing that is used for conveys waterpower
Jet hole device and its process.
Background technology
Coal bed gas well (layer) is increase coal seam parsing volume using Multilateral Wells and coal seam internal drilling technology, increases effective seepage flow
Area, the effective means for improving flow conductivity.Crept into currently used for coal bed gas well Multilateral Wells and the technique of coal bed drilling is to bore
Bar rotary drilling or screw drill drilling process, it is many that side opening jet hole is made using instruments such as whipstocks, and need outfit more
, there is the equipment amount of employing greatly, operation technique is complicated in ground special equipment and instrument, the limitation such as cost height.
It is many currently used for coal bed gas well Multilateral Wells drilling technology.Disclosed patent CN 201020224036.5 is public
A kind of device of no-radius radial direction well exploiting coal bed methane is opened, the device leads footwear etc. using high-pressure injection flexible pipe and DH eccentric center
Instrument, high-pressure injection hose strap jet nozzle enters flexible pipe guide pipe by casing head flank mouthful, enters back into DH eccentric center and leads footwear
Eccentric channel in, DH eccentric center leads eccentric channel in footwear and provides high-pressure injection flexible pipe from vertical duction level, utilizes jet
Nozzle carries out radial level direction drilling well drilling；But the process has limitation as previously described.In addition, it has been disclosed that specially
Sharp CN 201110123478.X and granted patent CN200910220786.7 individually disclose a kind of super short radius high pressure
Water jet composite well drilling, completion tool and its technique and a kind of ultra-short radius radial well-drilling tool system, the skill of two patents
Art scheme be by ground face-pumping convey with certain pressure liquid, by flexible pipe to underground, flexible pipe after whipstock is turned to,
The high-pressure injection of jet bit is utilized in the earth formation, carries out irrotational slipping drilling；However, in drilling process, flexible pipe exists
Rigidity is very strong in the presence of internal liquid high pressure, and steering gear is centering structure, and what is produced between flexible pipe and steering gear rubs
Resistance is larger, and drilling apparatus only possesses irrotational slipping drilling function, so it can not overcome frictional resistance by presence during steering gear,
It is difficult to the difficulty of long range slipping drilling；Meanwhile, high-pressure injection slipping drilling needs ground face-pumping to provide higher hydraulic coupling,
Therefore the voltage endurance capability of face-pumping and manifold requires very high over the ground, limits the application of the technology.
The content of the invention
Directly drill, realize in coal bed gas Open-Hole Section or horizontal section wellbore water-jet it is an object of the invention to provide a kind of
Increase coal seam parsing volume, the effective seepage area of increase, the coal bed gas well coiled tubing that is used for of raising flow conductivity and convey waterpower
Jet hole device.
It is a further object of the present invention to provide a kind of using above-mentioned water-jet drilling equipment and then using high-pressure jet
Different directions and different depth of the beam in coal seam spray, and get out multiple small diameter boreholes, are suitable for coal bed gas well (layer) slit long
Hole creep into and can multilayer position, with layer position many wells drilling, to increase length of the well in bed gas reservoir, expand spread area
Product, raising methane output.
Therefore, technical solution of the present invention is as follows：
One kind is used for coal bed gas well coiled tubing and conveys water-jet drilling equipment, including ground applications of coiled tubing unit and water
Power jet hole instrument assembly；Wherein：
Ground applications of coiled tubing unit includes applications of coiled tubing unit, lubricator, control head and servicing unit；Auxiliary dress
Put including fluid reservoir, high-pressure pump and ickings processing system；Fluid reservoir is connected by high-pressure pump with the oil pipe in applications of coiled tubing unit；
The ground applications of coiled tubing unit function is to provide conveying Downhole jetting boring bar tool to purpose well section, and realizes circulation canal and enter
Row well head goes out hydraulic control system, Stress control.
Water-jet bore hole tool assembly includes coiled tubing connector, the safe release dress being sequentially connected from top to bottom
Put, ball-and-seat, steering gear and water-jet head；Coiled tubing connector is connected to applications of coiled tubing unit bottom；Steering gear is liquid
Pressure type flow controls steering gear, diverter body is bent under hydraulic pressure promotion to certain by being suppressed into coiled tubing
Angle realizes water-jet head to pit shaft side wall jet hole；The function of the water-jet bore hole tool assembly is to coal bed gas well
Drilled along coal seam (section) certain orientation, form a small diameter long pit shaft, reach that expansion flows through the purposes such as area, increase yield.
Specifically, steering gear includes diverter body and the steering knuckle being arranged on below diverter body, steering gear sheet
Connected between body and steering knuckle by bending mechanism, tapered flow nipple, first are set from top to bottom in diverter body
Pad, spring, the second pad and push rod；First pad and the second pad center are provided with through hole, and the first pad and the second pad
It is press-fitted respectively and is fixed on spring top and bottom, push rod one end is fixed on the second pad bottom surface, the other end is extended obliquely out simultaneously
It is fixed on the offside inwall of steering knuckle bottom, when the hydraulic pressure entered by taper flow nipple in steering gear reaches certain pressure
When, promote the first gasket compression spring below taper flow nipple and promote push rod so that steering knuckle bottom stress bends to one
Determine angle.
One kind realizes that water-jet drills using the above-mentioned coal bed gas well coiled tubing conveying water-jet drilling equipment that is used for
Process, it comprises the following steps：
S1, pit shaft earlier machine prepare；
S2, in well head ground applications of coiled tubing unit and pressure testing are installed to qualified, water-jet bore hole tool assembly is installed
The bottom of coiled tubing in applications of coiled tubing unit, and drive water-jet bore hole tool assembly using ground applications of coiled tubing unit
G.I.H specified location；
S3, startup set high-pressure pump on the ground to be suppressed into coiled tubing, and pressure is transmitted by coiled tubing
To water-jet bore hole tool assembly, when hydraulic pressure transfer to steering gear, steering gear is angled under hydraulic action,
Now the water-jet bore hole tool assembly side that bends is resisted against on the borehole wall, and water-jet head is then against on the offside borehole wall simultaneously
Position of opening is treated in alignment；
S4, continue to suppress, the liquid with certain pressure sprays forward through water-jet head nozzle, high-speed jet and coal seam
Power, injection drilling drilling are acted between the borehole wall；After drilling is started, water-jet bore hole tool assembly bend side because
Lose the borehole wall causes hydraulic pressure to reduce against power, and water-jet head discharge capacity reduction, is water-jet by coiled tubing now
Head is sent into pressurization the pressure of the drill drilling, and by the way that water-jet head nozzle formation high-speed jet beam is broken, cutting coal stratum and creep into shape
Into small diameter borehole；
S5, handling coiled tubing, make water-jet bore hole tool assembly convert underground depth；Repeat step S3 and S4 are carried out
Second to N (N ＞ 2) individual well drilling operation.
Compared with prior art, this is used for the conveying of coal bed gas well coiled tubing water-jet drilling equipment is simple in construction, body
Product is small so that drilling fluid total amount is less required for during actual underground work use for it, and cost is low；Wherein, coiled tubing
The rigidity and flexibility itself having, adapt to open hole well operating mode and well wellbore stability；And steering gear is replaced used in device
For traditional directional inclination device, and the control steering gear of fluid pressure type flow is used, not only without sleeve pipe and can in bore operation
By controlling hydraulic pressure the steering knuckle of steering gear is bent to certain angle, to realize that water-jet head is against pit shaft side wall
Bore operation is carried out on precalculated position；In addition, for process angle, conveyed using coiled tubing, water-jet drills,
Relative to traditional CBM Fracturing technique, it is more beneficial for the wellbore stratum in coal (layer) and forms the long hole of slit, increase coal
Layer parsing volume, the effective seepage area of increase, raising flow conductivity；And can use clear water or low content using the process
KCl solution carries out operation as drilling fluid, coal seam will not be damaged or compared with Low Damage.
In summary, it is special without the ground for being equipped with more using above-mentioned water-jet drilling equipment and its process
Equipment and instrument, reduce construction cost, and solve the problem of being turned in the past by whipstock；In addition, using high-pressure jet
Different directions and different depth of the beam in coal seam spray, and get out multiple small diameter boreholes, are suitable for coal bed gas well (layer) slit long
Hole creep into and can multilayer position, with layer position many wells drilling, to increase length of the well in bed gas reservoir, expand spread area
Product, raising gas yield, increase production significant to bed gas reservoir.
Brief description of the drawings
Fig. 1 shows for the structure being used for when coal bed gas well coiled tubing conveying water-jet drilling equipment is not suppressed of the present invention
It is intended to；
Fig. 2 conveys steering gear when water-jet drilling equipment is suppressed through row for the coal bed gas well coiled tubing that is used for of the present invention
Occur to turn to the structural representation for carrying out Multilateral Wells drilling.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described further, but following embodiments are absolutely not to this hair
It is bright to have any limitation.
This is used for coal bed gas well coiled tubing conveying water-jet drilling equipment, including ground applications of coiled tubing unit and waterpower
Jet hole instrument assembly；Ground applications of coiled tubing unit is used to provide conveying Downhole jetting boring bar tool to purpose well section, and in fact
Existing circulation canal and progress well head go out hydraulic control system, Stress control；Water-jet bore hole tool assembly is used for coal bed gas well along coal
Layer (section) certain orientation drilling, forms a small diameter long pit shaft, to reach that expansion flows through the purposes such as area, increase yield.
Ground applications of coiled tubing unit includes applications of coiled tubing unit, lubricator, control head and servicing unit；Auxiliary dress
Put including fluid reservoir, high-pressure pump and ickings processing system；Fluid reservoir passes through the coiled tubing in high-pressure pump and applications of coiled tubing unit
Formed connection, by high-pressure pump into coiled tubing pump liquid and by adjusting high-pressure pump pump pressure to water-jet boring bar tool
Pressure in assembly is adjusted；Wherein, control head, lubricator and ickings processing system are purchased from showing for market sale
There is equipment to carry out the assembling of ground applications of coiled tubing unit.
As shown in Fig. 1~2, the coiled tubing that water-jet bore hole tool assembly includes being threadedly coupled successively from top to bottom connects
Connect device 2, safe releasing device 3, ball-and-seat 4, steering gear 5 and water-jet first 6；Coiled tubing connector 2 is connected to continuous oil
The bottom of the continuous oil pipe 1 of pipe device.
Wherein, steering gear 5 is using the control steering gear of fluid pressure type flow, including diverter body and is arranged on diverter body
The steering knuckle of lower section, is connected between diverter body and steering knuckle by bending mechanism, specifically, and bending mechanism selects liquid
Body universal joint；Tapered flow nipple, the first pad, spring, the second pad are set from top to bottom in diverter body and pushed away
Bar；First pad and the second pad center are provided with through hole and the first pad and the second pad are press-fitted and are fixed on spring top respectively
And bottom, the through-hole aperture of the first pad is less than flow nipple bottom inner diameter, liquid is entered the hydraulic pressure of steering gear by the
One pad is transferred to the thrust that spring transitions are moved into driving push rod, and push rod one end is fixed on the second pad and neighbouring steering gear sheet
On the bottom surface of body side side wall, the other end extend obliquely out and be fixed on the offside inwall of steering knuckle bottom, when passing through taper section
When the hydraulic pressure that stem bar enters in steering gear reaches certain pressure, the first pad is promoted to make spring-compressed and promote push rod to connect steering
Head forms 15~30 ° of angle of bend with diverter body；And after body-fluid pressure reduces, under the action of the spring, push rod is extensive
Reset condition is arrived again, and now steering knuckle is returned to coaxial state with diverter body.
Wherein, the actual flexion angle of the steering knuckle can pass through the bullet from spring according to job requirements under real well
The thickness of property coefficient and the first pad is adjusted.
In the well drilling process for carrying out Multilateral Wells, coiled tubing connector 2 is used to coiled tubing being connected to instrument
Or one end of work string, and corresponding pulling force, pressure and torsional forces can be born, by folding and unfolding coiled tubing by the work of its band
To purpose well section under tool or tubing string, corresponding function behaviour is completed；Safe releasing device 3 is arranged on downhole tool and coiled tubing connects
Between joint, for when going wrong, discharging drilling tool in well；Ball-and-seat 4 is used to prevent occurring blowout well out of coiled tubing
Gush；Water-jet first 6 is used for jet hole, according to kinetic energy-pressure energy transforming principle, using high-pressure jet impinging earth strata, when at a high speed
Fluid beam Contact -impact suddenly drops to zero to speed after rock, and its kinetic energy is converted into water pressure energy, causes crushing rock formation stress, continues
Impact then reaches the purpose of drilling.Wherein, coiled tubing connector 2, safe releasing device 3, ball-and-seat 4 and water-jet first 6
It is the current underground work conventional equipment come from market purchasing.
One kind realizes that water-jet drills using the above-mentioned coal bed gas well coiled tubing conveying water-jet drilling equipment that is used for
Process, it comprises the following steps：
S1, pit shaft earlier machine prepare, that is, complete the conventional preparation before underground work；
S2, in well head ground applications of coiled tubing unit and pressure testing are installed to qualified, water-jet bore hole tool assembly is installed
The bottom of coiled tubing in applications of coiled tubing unit, and drive water-jet bore hole tool assembly using ground applications of coiled tubing unit
G.I.H specified location；
S3, startup set high-pressure pump on the ground to be suppressed into coiled tubing, and pressure is transmitted by coiled tubing
To water-jet bore hole tool assembly, when hydraulic pressure transfer to steering gear, steering gear is angled under hydraulic action,
Now the water-jet bore hole tool assembly side that bends is resisted against on the borehole wall, and water-jet head is then against on the offside borehole wall simultaneously
Position of opening is treated in alignment；
S4, continue to suppress, the liquid with certain pressure sprays forward through water-jet head nozzle, high-speed jet and coal seam
Power, injection drilling drilling are acted between the borehole wall；After drilling is started, water-jet bore hole tool assembly bend side because
Lose the borehole wall causes hydraulic pressure to reduce against power, and water-jet head discharge capacity reduction, is water-jet by coiled tubing now
Head is sent into pressurization the pressure of the drill drilling, and by the way that water-jet head nozzle formation high-speed jet beam is broken, cutting coal stratum and creep into shape
Into small diameter borehole；
S5, handling coiled tubing, make water-jet bore hole tool assembly convert underground depth；Repeat step S3 and S4 are carried out
Second to N (N ＞ 2) individual well drilling operation.
The process amendment and overcome the problem of existing process technology is present, defect and deficiency, adapt in coal bed gas well
(layer) is crept into, and forms the long hole of slit, and increase coal seam parses volume, increases effective seepage area, improves flow conductivity.
Claims (3)
1. a kind of water-jet drilling equipment conveyed for coal bed gas well coiled tubing, it is characterised in that continuous including ground
Oil pipe device and water-jet bore hole tool assembly；Wherein, ground applications of coiled tubing unit include applications of coiled tubing unit, lubricator,
Control head and servicing unit；Servicing unit includes fluid reservoir, high-pressure pump and ickings processing system；Fluid reservoir passes through high pressure
Pump is connected with the oil pipe in applications of coiled tubing unit；Water-jet bore hole tool assembly includes the continuous oil being sequentially connected from top to bottom
Tube connector, safe releasing device, ball-and-seat, steering gear and water-jet head；Coiled tubing connector is connected to coiled tubing
Device bottom；Steering gear is that fluid pressure type flow controls steering gear, makes diverter body in hydraulic pressure by being suppressed into coiled tubing
Pressure promotes lower bending to certain angle to realize water-jet head to pit shaft side wall jet hole.
2. the coal bed gas well coiled tubing according to claim 1 that is used for conveys water-jet drilling equipment, it is characterised in that
Steering gear includes diverter body and the steering knuckle being arranged on below diverter body, between diverter body and steering knuckle
Connected by bending mechanism, tapered flow nipple, the first pad, spring, the second pad are set from top to bottom in diverter body
Piece and push rod；First pad and the second pad center are provided with through hole, and the first pad and the second pad are press-fitted and are fixed on respectively
Spring top and bottom, push rod one end is fixed on the second pad bottom surface, the other end is extended obliquely out and is fixed on steering knuckle bottom
Hold on offside inwall, when the hydraulic pressure entered by taper flow nipple in steering gear reaches certain pressure, promote taper flow nipple
First gasket compression spring of lower section simultaneously promotes push rod so that steering knuckle bottom stress is angled.
3. the coal bed gas well coiled tubing conveying water-jet that is used for described in a kind of any one of right to use 1~2 claim is bored
Aperture apparatus realizes the process of water-jet drilling, and it comprises the following steps：
S1, pit shaft earlier machine prepare；
S2, in well head ground applications of coiled tubing unit and pressure testing are installed to qualified, water-jet bore hole tool assembly is arranged on and connected
The bottom of coiled tubing in continuous oil pipe device, and drive water-jet bore hole tool assembly tripping in using ground applications of coiled tubing unit
Specified location in well；
S3, startup set high-pressure pump on the ground to be suppressed into coiled tubing, pass through coiled tubing and transmit pressure to water
Power jet hole instrument assembly, when hydraulic pressure transfer to steering gear, steering gear is angled under hydraulic action, now
The water-jet bore hole tool assembly side that bends is resisted against on the borehole wall, and water-jet head is then against on the offside borehole wall and is aligned
Treat position of opening；
S4, continue to suppress, the liquid with certain pressure sprays forward through water-jet head nozzle, high-speed jet and the coal seam borehole wall
Between act power, injection drilling drilling；After drilling is started, water-jet bore hole tool assembly bends side because losing
The borehole wall against power causes hydraulic pressure to reduce, water-jet head discharge capacity reduction, now, is that water-jet head is sent by coiled tubing
The pressure of the drill that enters to pressurize is crept into, and by the way that water-jet head nozzle formation high-speed jet beam is broken, cutting coal stratum and creep into and form small
Diameter borehole；
S5, handling coiled tubing, make water-jet bore hole tool assembly convert underground depth；Repeat step S3 and S4 carry out second
It is individual to N, 2 well drilling operations of N ＞.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044371.9A CN105507814B (en) | 2016-01-22 | 2016-01-22 | Water-jet drilling equipment and its process are conveyed for coal bed gas well coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044371.9A CN105507814B (en) | 2016-01-22 | 2016-01-22 | Water-jet drilling equipment and its process are conveyed for coal bed gas well coiled tubing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105507814A CN105507814A (en) | 2016-04-20 |
| CN105507814B true CN105507814B (en) | 2017-09-29 |
Family
ID=55716080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610044371.9A Expired - Fee Related CN105507814B (en) | 2016-01-22 | 2016-01-22 | Water-jet drilling equipment and its process are conveyed for coal bed gas well coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105507814B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278090B (en) * | 2018-03-20 | 2022-05-20 | 西南石油大学 | Chuck tool used in process of jetting conduit under coiled tubing |
| CN108868614B (en) * | 2018-07-25 | 2020-02-21 | 东北石油大学 | High-pressure hose and hydraulic jet radial drilling method |
| CN109356526B (en) * | 2018-11-07 | 2019-10-15 | 中国地质科学院勘探技术研究所 | A kind of continuous deflecting forming hole method of injecting type |
| CN111502545B (en) * | 2020-04-07 | 2022-03-01 | 中煤科工集团西安研究院有限公司 | Near-horizontal pressurized directional drilling equipment and method for complex broken stratum under coal mine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5467834A (en) * | 1994-08-08 | 1995-11-21 | Maverick Tool Company | Method and apparatus for short radius drilling of curved boreholes |
| CN203285334U (en) * | 2013-05-24 | 2013-11-13 | 中国石油化工股份有限公司 | Radial horizontal well steering device |
| CN104832092A (en) * | 2015-05-18 | 2015-08-12 | 山东科瑞国际油气工程有限公司 | Hydraulic jet sidetracking process |
| CN105003197B (en) * | 2015-07-27 | 2017-03-01 | 盐城市新永佳石油机械制造有限公司 | A kind of full-automatic helicoid hydraulic motor with location structure |
| CN205297334U (en) * | 2016-01-22 | 2016-06-08 | 廊坊开发区中油化油气技术服务有限公司 | It sprays drilling equipment to be used for coal seam gas well coiled tubing to carry water conservancy |
-
2016
- 2016-01-22 CN CN201610044371.9A patent/CN105507814B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105507814A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101429848B (en) | Method and apparatus for hydraulic jet side drilling for radial branching borehole | |
| CN105507814B (en) | Water-jet drilling equipment and its process are conveyed for coal bed gas well coiled tubing | |
| USRE44427E1 (en) | Apparatus for directional boring under mixed conditions | |
| CN101498210B (en) | Coal bed gas slim-hole hydraulic jet orienting fracturing yield increasing method | |
| CN101748970B (en) | Ultra-short radius radial drilling tool system | |
| CN102146779B (en) | Underground locating and angle-fixing drilling and windowing tool for horizontal well | |
| CN108952580B (en) | Drilling pipe recoverable abrasive jet flow fishbone spur well drilling and completion device | |
| CN105464638A (en) | Coal bed gas well pulse radial drilling and double-pulsating hydrofracturing method | |
| CN101824966A (en) | Device for jetting ultrashort radius horizontal hole by using high-pressure water | |
| CN106837172B (en) | A kind of radial well solves the boring method of thin interbed | |
| CN104912479B (en) | Method for drilling and completion of horizontal branched well for coal bed gas | |
| CN101994503A (en) | Production increasing method of coalbed gas | |
| CN202325239U (en) | Hydraulic jetting radial drilling device | |
| CN201367892Y (en) | Pipe string structure of downhole hydraulic-jetting fracturing and acidizing tool of oil-gas well | |
| CN106703720A (en) | Well drilling device with steel wire transmission function | |
| CN105089499A (en) | Coal mine downhole hydraulic jet tree-shaped drill hole guide device and method | |
| CN112211601A (en) | Coiled tubing and packer combined staged fracturing string for slim-hole well and method | |
| CN102235153B (en) | Method for directionally drilling inclined hole in steeply-inclined stratum | |
| CN105569620A (en) | Method and device for deep penetration perforation used in well completion of open hole well | |
| CN205297334U (en) | It sprays drilling equipment to be used for coal seam gas well coiled tubing to carry water conservancy | |
| CN107288540A (en) | A kind of oil/gas drilling volume increase connection makees device and method | |
| CN109594922A (en) | The method that water jet bores radial well operations | |
| CN108086912A (en) | A kind of self-propelled high pressure water jet drill bit | |
| CN104912480B (en) | Coal bed gas near-end docks the brill completion method of horizontal well | |
| CN105625945B (en) | Drilling equipment and its boring method for low permeability reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170929 Termination date: 20190122 |