CN107091068A - Avoid the device of oil well Crude Oil channel narrows - Google Patents
Avoid the device of oil well Crude Oil channel narrows Download PDFInfo
- Publication number
- CN107091068A CN107091068A CN201710550111.3A CN201710550111A CN107091068A CN 107091068 A CN107091068 A CN 107091068A CN 201710550111 A CN201710550111 A CN 201710550111A CN 107091068 A CN107091068 A CN 107091068A
- Authority
- CN
- China
- Prior art keywords
- drive device
- mounting cylinder
- crude oil
- supporting plate
- support tube
- 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.)
- Pending
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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Abstract
The invention discloses the device for avoiding oil well Crude Oil channel narrows, including the suspension apparatus being sequentially connected and except wax component, the wax component that removes includes connecting shaft, supporting plate, doctor assemblies, drive device I, drive device II and mounting cylinder, connecting shaft is connected with supporting plate, and the energy drive installation cylinder of drive device I is rotated around the axis of connecting shaft;Doctor assemblies include support shaft and support tube, and one end of support shaft is connected with mounting cylinder, and the other end of support shaft is connected after passing through support tube with mounting cylinder, and the driving of drive device II support tube is rotated;Several scrapers are provided with the side wall of the support tube.It will be put into by suspension apparatus except wax component in the oil well for needing paraffin removal, then drive device I, drive device II are started, so that scraper will remove the wax on oil well wall, and then the generation of the negative aspects such as the reduction of crude oil circulation passage, oil pressure rise, oil pipe blocking is avoided, to ensure that normally circulation and oil extraction are smoothed out crude oil.
Description
Technical field
The present invention relates to a kind of paraffin removal equipment, and in particular to avoids the device of oil well Crude Oil channel narrows.
Background technology
Drilling well is to utilize plant equipment, and stratum is drilled to the engineering of the cylindrical orifice with certain depth.It is broken by rock
Broken mode and used tool type, can be divided into percussion drill and rotary drilling again.
Percussion drill, also known as impact drill.Cable tool bit is sent to shaft bottom with steel wire rope, by power drive walking beam mechanism, makes walking beam
One end moves up and down, and drives percussion above and below steel wire rope and drill bit generation, makes catalase.Percussion drill drilling speed is slow, and efficiency is low,
Not adapting to well depth increasingly increases the drilling requirements with bad ground, is gradually replaced by rotary drilling.But it has equipment simple, cost
It is low, not the advantages of polluted reservoir, low pressure Oil/gas Well, the absorption well shallow available for some etc..
Rotary drilling is to utilize the cutting produced during bit or abrasive action fractured rock.It is current most general drilling well
Invention.It is faster than percussion drill drilling speed, and it is easily handled the complex situations such as well slough, blowout.By power delivery mode, rotary drilling can be divided into again
Rotating disk is bored and two kinds of underground power drilling:Rotating disk is drilled in device rotating disk at the well head of rig floor, and center of turntable part has on square hole, drill string
The kelly bar at end passes through and connects drill string and drill bit under the square hole, kelly bar, drives drill string and drill bit to revolve together during power drive rotating disk
Turn, fractured rock.Underground power drilling is to drive drill bit fractured rock using mud motor, and drill string is not rotated during drilling, mill
Damage small, service life long, be particularly suitable for digging a directional well.Well dynamic is drilled with turbine brill, screw drill and electric drill etc..
The crude oil of some places is high due to the content of wax, and oil well paraffinication phenomenon is serious.Oil well paraffinication can cause crude oil circulation passage
The problems such as reduction, oil pressure rise, oil pipe blocking.Wax deposition can also make the excessive burning pump of electric pump load, finally result in the crude oil underproduction even
Stop production.
The content of the invention
Present invention aims at the device that offer avoids oil well Crude Oil channel narrows, crude oil can be caused by solving oil well paraffinication
The problem of circulation passage reduction, oil pressure rise, oil pipe blocking.
The present invention is achieved through the following technical solutions:
The device of oil well Crude Oil channel narrows is avoided, including the suspension apparatus that is sequentially connected and except wax component, it is described outstanding
Device for hoisting driving is vertically moved except wax component, it is described except wax component include connecting shaft, supporting plate, doctor assemblies, drive device I,
Drive device II and the mounting cylinder being set in connecting shaft, one end of the connecting shaft is connected with supporting plate, and the axle of connecting shaft
Line is perpendicular to supporting plate, and the drive device I is located in supporting plate, and energy drive installation cylinder is rotated around the axis of connecting shaft;
The doctor assemblies include support shaft and support tube, and one end of the support shaft and the side wall of mounting cylinder are connected, branch
The other end of support axle bends and is connected with the side wall of mounting cylinder, the drive device to mounting cylinder after passing through the centre bore of support tube
II driving support tube is rotated around oneself axis;Several scrapers, the knife of the scraper are provided with the side wall of the support tube
Axis of the sword parallel to support tube.
It will be put into by suspension apparatus except wax component in the oil well for needing paraffin removal, then start drive device I, drive device
II, when scraper is around supporting cylinder axis rotation, scraper strikes off the wax on wall, and with the startup of drive device II, scraper group
The overall axis around connecting shaft of part is rotated, so that the wax that scraper encloses the borehole wall one strikes off;Simultaneously in the effect of suspension apparatus
Under, except wax component is moved along oil well axis, the wax on oil well wall is removed, and then avoid the reduction of crude oil circulation passage, oil
The generation of the negative aspects such as rise, oil pipe blocking is pressed, to ensure that normally circulation and oil extraction are smoothed out crude oil.
Further, the support shaft bends to C-shaped, and its end is connected with the side wall of mounting cylinder, the support tube position
In in support shaft away from mounting cylinder axle portion on.
The cross section of the scraper is triangle, and its base is connected with support tube, and its stringcourse is arc, and a stringcourse
Inner concave is towards the center of the triangle, the center of the inner concave of another stringcourse dorsad triangle.
The section of scraper is set into triangularity, and two stringcourses are camber line, strike off the wax layer on wall beneficial to scraper.
Further, support bar coaxial to one another and splicing bucket are provided with the lower surface of the supporting plate, it is described
Support bar and connecting shaft coaxial line, one end of support bar and the lower surface of supporting plate are connected, the other end and splicing bucket of support bar
The connection of bucket bottom, the opening of the splicing bucket is towards supporting plate.
The bucket wall thickness of the splicing bucket is gradually reduced from bucket bottom to openend, and the opening of splicing bucket goes out, its inwall
Intersect with outer wall.
The wax struck off by scraper can be fallen in splicing bucket under gravity, collection and follow-up wax in order to borehole wall wax layer
Layer focus on;The bucket wall thickness of splicing bucket is gradually reduced from bucket bottom to openend, so as to drop in splicing bucket edge
Wax can smoothly enter splicing bucket in.
The doctor assemblies have three, and line of symmetry is evenly provided on the outer of mounting cylinder centered on the axis of mounting cylinder
On wall.
The present invention compared with prior art, has the following advantages and advantages:
1st, the present invention avoids the device of oil well Crude Oil channel narrows, and paraffin removal will be needed except wax component is put into by suspension apparatus
Oil well in, then start drive device I, drive device II, scraper around supporting cylinder axis rotate when, scraper is by the wax on wall
Strike off, and with the startup of drive device II, the overall axis around connecting shaft of doctor assemblies is rotated, so that scraper is by the borehole wall one
The wax of circle strikes off;Simultaneously in the presence of suspension apparatus, except wax component is moved along oil well axis, by the wax on oil well wall
Remove, and then avoid the generation of the negative aspects such as the reduction of crude oil circulation passage, oil pressure rise, oil pipe blocking, to ensure crude oil just
Permanent current is logical and oil extraction is smoothed out;
2nd, the present invention avoids the device of oil well Crude Oil channel narrows, and the section of scraper is set into triangularity, and two waists
Line is camber line, strikes off the wax layer on wall beneficial to scraper;
3rd, the present invention avoids the devices of oil well Crude Oil channel narrows, and the bucket wall thickness of splicing bucket is from bucket bottom to openend
It is gradually reduced, so that the wax dropped in splicing bucket edge smoothly can enter in splicing bucket.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the invention;
Fig. 2 is top view of the invention;
Fig. 3 is front view of the invention;
Fig. 4 is the sectional view of splicing bucket;
Fig. 5 is the front view of mounting cylinder
Fig. 6 is using the position view during present invention.
Mark and corresponding parts title in accompanying drawing:
1- connecting shafts, 2- supporting plates, 3- support shafts, 4- support tubes, 5- mounting cylinders, 6- scrapers, 7- splicing buckets, 8- supports
Bar, 9- winches, 10- steel wire ropes, 11- fixed wheels, 12- gears II, 13- installing plates, 14- motors I, 15- gears I.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment 1
As shown in figs 1 to 6, the present invention avoids the device of oil well Crude Oil channel narrows, including the suspention dress being sequentially connected
Put and except wax component, the suspension apparatus driving is vertically moved except wax component, it is described except wax component includes connecting shaft 1, supporting plate
2nd, doctor assemblies, drive device I, drive device II and the mounting cylinder 5 being set in connecting shaft 1, one end of the connecting shaft 1 with
Supporting plate 2 is connected, and connecting shaft 1 axis perpendicular to supporting plate 2, the drive device I is located in supporting plate 2, and can drive
Mounting cylinder 5 is rotated around the axis of connecting shaft 1;
The doctor assemblies include support shaft 3 and support tube 4, and one end of the support shaft 3 connects with the side wall of mounting cylinder 5
Connect, the other end of support shaft 3, which is passed through, to be bent to mounting cylinder 5 and be connected with the side wall of mounting cylinder 5, institute after the centre bore of support tube 4
The driving support tube 4 of drive device II is stated to rotate around oneself axis;Several scrapers 6 are provided with the side wall of the support tube 4,
Axis of the blade of the scraper 6 parallel to support tube 4.
It will be put into by suspension apparatus except wax component in the oil well for needing paraffin removal, then start drive device I, drive device
II, when scraper 6 is around the supporting axis of cylinder 4 rotation, scraper 6 strikes off the wax on wall, and with the startup of drive device II, scraper
The overall axis around connecting shaft 1 of component is rotated, so that the wax that scraper 6 encloses the borehole wall one strikes off;Simultaneously in suspension apparatus
Under effect, except wax component is moved along oil well axis, the wax on oil well wall is removed, and then avoid crude oil circulation passage from subtracting
The generation of the negative aspects such as small, oil pressure rise, oil pipe blocking, to ensure that normally circulation and oil extraction are smoothed out crude oil.
Embodiment 2
The present invention is that on the basis of embodiment 1, the present invention is further illustrated.
As shown in figs 1 to 6, the present invention avoids the device of oil well Crude Oil channel narrows, and the support shaft 3 bends to C
Shape, its end is connected with the side wall of mounting cylinder 5, and the support tube 4 is located in support shaft 3 in the axle portion away from mounting cylinder 5.
The cross section of the scraper 6 is triangle, and its base is connected with support tube 4, and its stringcourse is arc, and a stringcourse
Inner concave towards the center of the triangle, the center of the inner concave of another stringcourse dorsad triangle.
The section of scraper 6 is set into triangularity, and two stringcourses are camber line, strike off the wax layer on wall beneficial to scraper 6.
Further, support bar 8 coaxial to one another and splicing bucket 7, institute are provided with the lower surface of the supporting plate 2
State support bar 8 and the coaxial line of connecting shaft 1, one end of support bar 8 is connected with the lower surface of supporting plate 2, the other end of support bar 8 with
The bucket bottom connection of splicing bucket 7, the opening of the splicing bucket 7 is towards supporting plate 2.
The bucket wall thickness of the splicing bucket 7 is gradually reduced from bucket bottom to openend, and the opening of splicing bucket 7 goes out, in it
Wall intersects with outer wall.
The wax struck off by scraper can be fallen in splicing bucket 7 under gravity, in order to the collection of borehole wall wax layer and follow-up
Wax layer is focused on;The bucket wall thickness of splicing bucket 7 is gradually reduced from bucket bottom to openend, so as to drop on the side of splicing bucket 7
Wax at edge smoothly can enter in splicing bucket 7.
Embodiment 3
The present invention is that on the basis of embodiment 1, suspension apparatus is further illustrated.
As shown in figs 1 to 6, the present invention avoids the device of oil well Crude Oil channel narrows, and the suspension apparatus includes fixed wheel
11st, winch 9 and steel wire rope 10, one end of the steel wire rope 10 are connected with winch 9, the other end of steel wire rope bypass after fixed wheel 11 with
Connecting shaft 1 is connected, and winch 9 is by folding and unfolding steel wire rope so that connecting shaft 1 carries out the axis movement perpendicular to horizontal plane.
Embodiment 4
The present invention is that on the basis of embodiment 1, drive device I is further illustrated.
As Figure 1-Figure 5, the present invention avoids the device of oil well Crude Oil channel narrows, and the drive device I includes electricity
Machine I 14 and gear I 15, the gear I 15 are set on mounting cylinder 5, and the motor I 14 passes through I 15 turns of retarder driver gear
It is dynamic, and drive mounting cylinder 5 to rotate.
Embodiment 5
The present invention is that on the basis of embodiment 4, drive device II is further illustrated.
As shown in figs 1 to 6, the present invention avoids the device of oil well Crude Oil channel narrows, and the drive device II includes electricity
Machine II and gear II 12, the motor are rotated by retarder driver gear II 12, and the gear II 12 is set in support shaft 3
On, and drive supporting cylinder 5 to rotate.
Installing plate 13 is arranged with mounting cylinder 5, the installing plate 13 is located at the top of gear I 15, the motor and institute
Decelerator is stated to be respectively positioned on installing plate 13, when the drive installation of drive device I cylinder 5 is rotated, motor, deceleration on installing plate 13
Device is rotated.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (6)
1. avoid the device of oil well Crude Oil channel narrows, including the suspension apparatus that is sequentially connected and except wax component, the suspention
Device driving is vertically moved except wax component, it is characterised in that:The wax component that removes includes connecting shaft (1), supporting plate (2), scraper
Component, drive device I, drive device II and the mounting cylinder (5) being set in connecting shaft (1), one end of the connecting shaft (1) with
Supporting plate (2) is connected, and connecting shaft (1) axis perpendicular to supporting plate (2), the drive device I is located in supporting plate (2),
And energy drive installation cylinder (5) is rotated around the axis of connecting shaft (1);
The doctor assemblies include support shaft (3) and support tube (4), one end of the support shaft (3) and the side wall of mounting cylinder (5)
Connection, the other end of support shaft (3) through bent to mounting cylinder (5) after the centre bore of support tube (4) and with the side of mounting cylinder (5)
Wall is connected, and the driving support tube of drive device II (4) rotates around oneself axis;Set on the side wall of the support tube (4)
There are several scrapers (6), the axis of the blade of the scraper (6) parallel to support tube (4).
2. the device according to claim 1 for avoiding oil well Crude Oil channel narrows, it is characterised in that:The support shaft
(3) C-shaped is bent to, side wall of its end with mounting cylinder (5) is connected, the support tube (4) is located in support shaft (3) away from peace
In the axle portion of fitted tube (5).
3. the device according to claim 1 for avoiding oil well Crude Oil channel narrows, it is characterised in that:The scraper (6)
Cross section be triangle, its base is connected with support tube (4), and its stringcourse is arc, and a stringcourse inner concave towards institute
State the center of triangle, the center of the inner concave of another stringcourse dorsad triangle.
4. the device according to claim 1 for avoiding oil well Crude Oil channel narrows, it is characterised in that:In the supporting plate
(2) support bar (8) coaxial to one another and splicing bucket (7), the support bar (8) and connecting shaft (1) are provided with lower surface
Coaxial line, one end of support bar (8) is connected with the lower surface of supporting plate (2), the other end and the splicing bucket (7) of support bar (8)
The connection of bucket bottom, the opening of the splicing bucket (7) is towards supporting plate (2).
5. the device according to claim 4 for avoiding oil well Crude Oil channel narrows, it is characterised in that:The splicing bucket
(7) bucket wall thickness is gradually reduced from bucket bottom to openend, and the opening of splicing bucket (7) goes out, and its inwall intersects with outer wall.
6. the device according to claim 1 for avoiding oil well Crude Oil channel narrows, it is characterised in that:The doctor assemblies
There are three, and line of symmetry is evenly provided on the outer wall of mounting cylinder (5) centered on the axis of mounting cylinder (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710550111.3A CN107091068A (en) | 2017-07-07 | 2017-07-07 | Avoid the device of oil well Crude Oil channel narrows |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710550111.3A CN107091068A (en) | 2017-07-07 | 2017-07-07 | Avoid the device of oil well Crude Oil channel narrows |
Publications (1)
Publication Number | Publication Date |
---|---|
CN107091068A true CN107091068A (en) | 2017-08-25 |
Family
ID=59641623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710550111.3A Pending CN107091068A (en) | 2017-07-07 | 2017-07-07 | Avoid the device of oil well Crude Oil channel narrows |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107091068A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109513697A (en) * | 2018-11-19 | 2019-03-26 | 中国通信建设第工程局有限公司 | Communication pipe tube hole plug point milling attachment |
CN110447516A (en) * | 2019-09-06 | 2019-11-15 | 北京益康农科技发展有限公司 | A kind of Negative pressure irrigation system |
CN111706298A (en) * | 2020-06-29 | 2020-09-25 | 中国石油天然气股份有限公司 | Horizontal shaft wax removal tool bit |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN200943467Y (en) * | 2006-09-14 | 2007-09-05 | 大庆油田有限责任公司 | Movable paraffin scraper |
WO2009123468A1 (en) * | 2008-04-03 | 2009-10-08 | Aker Well Service As | Cleaning tool device |
US20100263856A1 (en) * | 2009-04-17 | 2010-10-21 | Lynde Gerald D | Slickline Conveyed Bottom Hole Assembly with Tractor |
RU2498049C1 (en) * | 2012-07-17 | 2013-11-10 | Виктор Егорович Александров | Device for cleaning of inner surface of tubing string |
CN204266992U (en) * | 2014-11-28 | 2015-04-15 | 新疆大学 | Novel wax removal cutter |
CN204827377U (en) * | 2015-07-31 | 2015-12-02 | 中国神华能源股份有限公司 | Scrape material drill bit |
CN205503098U (en) * | 2016-04-05 | 2016-08-24 | 中国石油集团渤海钻探工程有限公司第一固井分公司 | Scraper |
CN206000514U (en) * | 2016-09-18 | 2017-03-08 | 重庆科技学院 | A kind of connecting ring type drilling fluid removing device |
CN206233905U (en) * | 2016-11-04 | 2017-06-09 | 赵汝燕 | A kind of oil field pipe wax scraping apparatus |
-
2017
- 2017-07-07 CN CN201710550111.3A patent/CN107091068A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN200943467Y (en) * | 2006-09-14 | 2007-09-05 | 大庆油田有限责任公司 | Movable paraffin scraper |
WO2009123468A1 (en) * | 2008-04-03 | 2009-10-08 | Aker Well Service As | Cleaning tool device |
US20100263856A1 (en) * | 2009-04-17 | 2010-10-21 | Lynde Gerald D | Slickline Conveyed Bottom Hole Assembly with Tractor |
RU2498049C1 (en) * | 2012-07-17 | 2013-11-10 | Виктор Егорович Александров | Device for cleaning of inner surface of tubing string |
CN204266992U (en) * | 2014-11-28 | 2015-04-15 | 新疆大学 | Novel wax removal cutter |
CN204827377U (en) * | 2015-07-31 | 2015-12-02 | 中国神华能源股份有限公司 | Scrape material drill bit |
CN205503098U (en) * | 2016-04-05 | 2016-08-24 | 中国石油集团渤海钻探工程有限公司第一固井分公司 | Scraper |
CN206000514U (en) * | 2016-09-18 | 2017-03-08 | 重庆科技学院 | A kind of connecting ring type drilling fluid removing device |
CN206233905U (en) * | 2016-11-04 | 2017-06-09 | 赵汝燕 | A kind of oil field pipe wax scraping apparatus |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109513697A (en) * | 2018-11-19 | 2019-03-26 | 中国通信建设第工程局有限公司 | Communication pipe tube hole plug point milling attachment |
CN110447516A (en) * | 2019-09-06 | 2019-11-15 | 北京益康农科技发展有限公司 | A kind of Negative pressure irrigation system |
CN111706298A (en) * | 2020-06-29 | 2020-09-25 | 中国石油天然气股份有限公司 | Horizontal shaft wax removal tool bit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107201890A (en) | The method for striking off crude oil conduit wall wax layer | |
CN107091068A (en) | Avoid the device of oil well Crude Oil channel narrows | |
CN204402349U (en) | Hydraulic pressure high frequency down-the-hole at the bottom of rotary pile-digging machine hole breaks rock and bores | |
CN103726785B (en) | Rotary drilling rig with hydraulic breaker device | |
CN106677702A (en) | Drilling machine for hydraulic engineering construction | |
CN104863496B (en) | Hydraulic high-frequency DTH rock-breaking drill for rotary pile drill hole bottom | |
CN109281605A (en) | A kind of oil exploitation Special drilling device | |
CN202627958U (en) | Locked type hole digging pile machine | |
CN203488099U (en) | Hydraulic control rapid drilling machine | |
CN107091067A (en) | Petroleum drilling takes oil well de-waxing apparatus | |
CN111139825A (en) | Cast-in-place pile obstacle removing method | |
CN102425370B (en) | Hole bottom oil pressure motor lithoclast combined power drilling tool construction method and device | |
CN204984249U (en) | Punching pile driver drill bit | |
CN105971495B (en) | Drilling rod rotation stop formula rotary pile-digging machine bottom hole hydraulic pressure high frequency down-the-hole broken rock is bored inside and outside swivel joint | |
CN201330559Y (en) | Pneumatic down-hole hammer wind-pressure drilling device | |
CN209354153U (en) | A kind of push pipe rotary drilling device | |
CN106854880A (en) | Rig in excavator arm with quartering hammer | |
CN205895129U (en) | Outside drill pipe splines formula and digs broken rock of quick -witted hole bottom of stake soon and bore in swivel joint | |
CN107130941A (en) | Paraffin removal method for crude oil oil well | |
WO2020034178A1 (en) | Cleaning tool for mechanical apparatus | |
CN206539316U (en) | A kind of torque-on-bit limits instrument | |
CN206503561U (en) | A kind of drill bit for geotechnical boring | |
CN206521780U (en) | Rig in excavator arm with quartering hammer | |
CN205189748U (en) | Novel rotary drilling rig | |
CN213627449U (en) | Downhole tool of downhole multi-branch ultrashort radius horizontal drilling completion system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170825 |
|
RJ01 | Rejection of invention patent application after publication |