CN106958429A - A kind of horizontal well pressurization driving tool - Google Patents
A kind of horizontal well pressurization driving tool Download PDFInfo
- Publication number
- CN106958429A CN106958429A CN201710230546.XA CN201710230546A CN106958429A CN 106958429 A CN106958429 A CN 106958429A CN 201710230546 A CN201710230546 A CN 201710230546A CN 106958429 A CN106958429 A CN 106958429A
- Authority
- CN
- China
- Prior art keywords
- screwed connection
- inner chamber
- tube
- connection
- universal
- 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
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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
Abstract
The present invention relates to a kind of pressurization driving tool of oil and gas industry horizontal well drilling.It solves the de- pressure of horizontal segment drill string, the problem of being sent into difficult.Its technical scheme is：Top connection and upper drilling string screwed connection, output shaft and lower drilling string screwed connection；Stator case upper end and the screwed connection of top connection lower end, stator case lower end and the screwed connection of universal shaft housing upper end；Universal drive shaft upper end and the screwed connection of screw rotor lower end, universal drive shaft lower end and the screwed connection of central tube upper end；Magnet ring inlays the lower surface for being fixed on universal shaft housing inner chamber lower end raised step；Stop pin and spring a integral installations are in the axial step hole of propulsion tube upper surface, and sliding block and spring b integral installations are in the radial direction counterbore on the cylindrical top of propulsion tube；Shell body lower end and bleed off cap screwed connection.The present invention utilizes the principle of lead screw transmission, and output shaft can provide axial thrust, promotes lower drilling string to be sent into, effectively extension horizontal segment drilling well length, increases economic efficiency.
Description
Technical field
The present invention relates to a kind of pressurization driving tool of oil and gas industry horizontal well drilling.
Background technology
In oil and gas industry, horizontal well has obtained extensive development due to good economic benefit, especially in shale
In gas development and application, fractured horizontal well operation is almost into indispensable technique.Horizontal well is with being noteworthy characterized by oil-gas reservoir
Layer has very long well section, and usual hole angle reaches that more than 85 ° of well can be described as horizontal well.However as horizontal section length
Increase, the weight of horizontal segment drill string can be continuously increased, and it directly results in the frictional resistance between horizontal segment drill string and well
Increase, causes drill string to be sent into difficult, and horizontal section length is difficult to further increase, and the well for directly constraining oil-gas reservoir stratum is long
Degree.
If horizontal segment drill string and the frictional resistance of well can be overcome, further extend horizontal segment drilling well length, then
Well yield and oil-gas reservoir recovery ratio can be greatly enhanced, Development and Production cost is reduced.During current horizontal well drilling, state
Interior technology is ripe not as good as foreign technology, is mainly reflected in the backwardness of drilling well assembling, and external dependence degree is higher.Current country's extension
The main thought of long horizontal sections drilling well length is how to reduce the frictional resistance between horizontal segment drill string and well, and one kind generally makes
Instrument is water conservancy oscillator.The cardinal principle of hydroscillator is to utilize continuous water attack principle, occurs horizontal segment drill string
Bounce, allows the static friction between drill string and well to be changed into dynamic friction, and kinetic frictional resistances are less than maximum static friction resistance, so that
Reduce the frictional resistance that horizontal segment drill string is sent into, effectively extension horizontal segment drilling well length.But how the instrument applied at present is carrying
Effective thinking is there is no in terms of for being actively sent into thrust, the present invention is on the basis of this thinking, and spy provides a kind of horizontal well pressurization and pushed away
Enter instrument, feeding thrust, effectively extension horizontal segment drilling well length are provided for horizontal segment drill string.
The content of the invention
The purpose of the present invention is：In order to solve the de- pressure of horizontal segment drill string, the problem of being sent into difficult, spy provides a kind of horizontal well
Pressurize driving tool.
In order to achieve the above object, the present invention uses following technical scheme：A kind of horizontal well pressurization driving tool, is by upper
Joint, stator case, elastomer stator, screw rotor, universal drive shaft, universal shaft housing, central tube, self-aligning bearing, magnet ring, spring a,
Stop pin, sliding block, spring b, propulsion tube, spiral-tube, thrust bearing, sliding pin, bearing block, shell body, output shaft and anti-cap off structure
Into；Its architectural feature is：Top connection and upper drilling string screwed connection, output shaft and lower drilling string screwed connection；Elastomer stator is consolidated
Stator case inner chamber is scheduled on, screw rotor inserts elastomer stator inner chamber；Stator case upper end and the screwed connection of top connection lower end, it is fixed
Sub- housing lower end and the screwed connection of universal shaft housing upper end；Under universal drive shaft upper end and the screwed connection of screw rotor lower end, universal drive shaft
End and the screwed connection of central tube upper end；Universal shaft housing inner chamber lower end sets one to enclose raised step, and self-aligning bearing is arranged on universal
The upper surface of axle housing intracoelomic cavity lower end raised step, magnet ring inlays the lower end for being fixed on universal shaft housing inner chamber lower end raised step
Face, magnet ring has magnetic；The cylindrical top of central tube sets one to enclose raised step, and central tube upper end is circumferentially uniformly arranged three inclined holes
Interior or exterior space is connected, the cylindrical middle part of central tube is set to outer six sides；Spiral-tube upper end and the screwed connection of universal shaft housing lower end, spiral shell
Revolve cylinder lower end and the screwed connection of shell body upper end；Spiral tube inner chamber is provided with single thread groove, and single thread groove lower end is received
Mouth is set to slope at position；Tube inner chamber is promoted to be set to interior six side, the cylindrical top of propulsion tube sets a radial direction counterbore, propulsion tube
Upper surface sets an axial step hole to be connected with radial direction counterbore；Slider bottom sets an axial counterbore, and upper end of slide block setting one is convex
Platform, the cylindrical middle part of sliding block sets a radial direction counterbore, and spring b is arranged in the axial counterbore of slider bottom；Stop pin permeability magnetic material
Constitute, stop pin is cylindrical to set one to enclose raised step, and spring a is arranged in the cylindrical raised step of stop pin；Stop pin and spring a
Integral installation is in the axial step hole of propulsion tube upper surface, the footpath of sliding block and spring b integral installations on the cylindrical top of propulsion tube
Into counterbore；Bearing block lower end is set to box thread, and the cylindrical middle part of bearing block is circumferentially uniformly arranged eight pin grooves；In shell body
Chamber is circumferentially uniformly arranged eight pin chutes；Thrust bearing is arranged on terminal filament on bearing block upper end, bearing block lower end and output shaft
Button connection；Bearing block and output shaft integrally insert shell intracoelomic cavity, and eight sliding pins are sequentially arranged at eight, the cylindrical middle part of bearing block
In the chamber of eight pin chute formation of pin grooves and shell intracoelomic cavity；Shell body lower end and bleed off cap screwed connection.
The beneficial effects of the invention are as follows：(1) output shaft of the invention can provide axial thrust, promote lower drilling string to send
Enter；(2) present invention is using the principle of lead screw transmission, and the axial direction that the circumferential torsion that screw rotor is exported is converted into propulsion tube is pushed away
Power, the amplification effect with power meets the demand of drill string propulsion there is provided huge axial thrust；(3) present invention utilizes drilling fluid
Driving, is controlled simple and reliable；(4) present invention is pure mechanic structure, is suitable for the bad working environments of drilling well, and fault rate is low, safely may be used
Lean on.
Brief description of the drawings
Fig. 1 is the structural representation that a kind of horizontal well pressurization driving tool of the invention promotes working condition；
Fig. 2 is that the present invention plants the structural representation that horizontal well pressurization driving tool promotes limiting condition；
Fig. 3 is the structural representation that the present invention plants horizontal well pressurization driving tool backhaul limiting condition；
Fig. 4 is partial enlarged view at L in Fig. 1；
Fig. 5 is partial enlarged view at M in Fig. 2；
Fig. 6 is partial enlarged view at N in Fig. 3；
Fig. 7 is Section A-A sectional view in Fig. 2；
Fig. 8 is section B-B sectional view in Fig. 2；
Fig. 9 is the three-dimensional structure sectional view of spiral-tube；
Figure 10 is the three dimensional structure diagram of sliding block；
In figure：1. top connection, 2. stator cases, 3. elastomer stators, 4. screw stators, 5. universal drive shafts, 6. universal shaft housings,
7. central tube, 8. self-aligning bearings, 9. magnet rings, 10. spring a, 11. stop pins, 12. sliding blocks, 13. spring b, 14. propulsion tubes, 15.
Spiral-tube, 16. thrust bearings, 17. sliding pins, 18. bearing blocks, 19. shell bodies, 20. output shafts, 21. prevent capping off.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of horizontal well pressurization driving tool of the invention, is by top connection 1, stator case
2nd, elastomer stator 3, screw rotor 4, universal drive shaft 5, universal shaft housing 6, central tube 7, self-aligning bearing 8, magnet ring 9, spring a10, lock
Rationed marketing 11, sliding block 12, spring b13, propulsion tube 14, spiral-tube 15, thrust bearing 16, sliding pin 17, bearing block 18, shell body 19,
Output shaft 20 caps off 21 compositions with anti-；Its architectural feature is：Top connection 1 and upper drilling string screwed connection, output shaft 20 and bottom
Drill string screwed connection；Elastomer stator 3 is fixed on the inner chamber of stator case 2, and screw rotor 4 inserts the inner chamber of elastomer stator 3；Stator case
2 upper ends and the lower end screwed connection of top connection 1, the lower end of stator case 2 and the upper end screwed connection of universal shaft housing 6；The upper end of universal drive shaft 5
With the lower end screwed connection of screw rotor 4, the lower end of universal drive shaft 5 and the upper end screwed connection of central tube 7；The inner chamber lower end of universal shaft housing 6
One is set to enclose raised step, self-aligning bearing 8 is arranged on the upper surface of the inner chamber lower end raised step of universal shaft housing 6, and magnet ring 9 is inlayed
The lower surface of the inner chamber lower end raised step of universal shaft housing 6 is fixed on, magnet ring 9 has magnetic；The cylindrical top of central tube 7 sets one
Raised step is enclosed, the upper end of central tube 7 is circumferentially uniformly arranged three inclined hole connection interior or exterior spaces, and the cylindrical middle part of central tube 7 is set to
Outer six side；The upper end of spiral-tube 15 and the lower end screwed connection of universal shaft housing 6, the lower end of spiral-tube 15 and the upper end screw thread of shell body 19 connect
Connect；As shown in figure 9, the inner chamber of spiral-tube 15 is provided with single thread groove, single thread groove lower end is set at closing in position
Slope；As shown in fig. 7, the inner chamber of propulsion tube 14 is set to interior six side, the cylindrical top of propulsion tube 14 sets a radial direction counterbore, propulsion tube
14 upper surfaces set an axial step hole to be connected with radial direction counterbore；The lower end of bearing block 18 is set to box thread, and bearing block 18 is cylindrical
Middle part is circumferentially uniformly arranged eight pin grooves；The inner chamber of shell body 19 is circumferentially uniformly arranged eight pin chutes；Thrust bearing 16 is pacified
Mounted in the upper end of bearing block 18, the lower end of bearing block 18 and the upper end screwed connection of output shaft 20；As shown in figure 8, bearing block 18 and output
Axle 20 is overall to insert the inner chamber of shell body 19, and eight sliding pins 17 are sequentially arranged at eight, the cylindrical middle part pin grooves of bearing block 18 and shell
In the chamber of 19 inner chamber of body, eight pin chute formation；The lower end of shell body 19 and bleed off cap screwed connection.
As shown in Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Figure 10, the bottom of sliding block 12 sets an axial counterbore, and the upper end of sliding block 12 sets one
Boss, the cylindrical middle part of sliding block 12 sets a radial direction counterbore, and spring b13 is arranged in the axial counterbore in the bottom of sliding block 12；Stop pin 11
Constituted with permeability magnetic material, stop pin 11 is cylindrical to set one to enclose raised step, and spring a10 is arranged on the cylindrical raised step of stop pin 11
On；Stop pin 11 and spring a10 integral installations are in the axial step hole of the upper surface of propulsion tube 14, and sliding block 12 and spring b13 are whole
Body is arranged in the radial direction counterbore on the cylindrical top of propulsion tube 14；The boss of the upper end of sliding block 12 can the inner chamber of spiral-tube 15 single head spiral shell
Revolve in groove and slide.
A kind of operation principle of present invention horizontal well pressurization driving tool is：Under enter the present invention to net horizontal section, initial bit
Put as shown in Figure 3 and Figure 6；Turn on pump circulating fluid, the driving universal drive shaft 5 of helical rotor 4 and central tube 7 are rotated, and central tube 7 drives
Propulsion tube 14 is rotated, and the upper end boss of sliding block 12 is slided in the single thread groove of spiral-tube 15；As shown in Figure 1 and Figure 4, promote
14 axial advancements of cylinder simultaneously promote thrust bearing 16, bearing block 18 and the overall advance of output shaft 20, so as to promote lower drilling string to advance；
When sliding block 12 is slid at the single thread groove lower end closing in position of spiral-tube 15, sliding block 12 is radially received under being acted on slope
Return, and locked pin 11 locks the state, as shown in Figure 2 and Figure 5；At this moment upper drilling string is persistently sent into, and output shaft is below 20
Drill string is not readvanced, and upper drilling string is constantly closely located to after certain limit close to lower drilling string, propulsion tube 14 and magnet ring 9, locking
Pin 11 solves lock slide 12 under the attraction of the magnetic force of magnet ring 9, and the present invention returns to the initial position shown in Fig. 3 and Fig. 6, at this moment a motion
Cycle is completed, and the drill string for starting next cycle is promoted.The present invention utilizes lead screw transmission principle, and huge axle is provided for lower drilling string
To thrust, drill string is promoted to advance, a section drilling well length of improving the standard.
Claims (2)
1. a kind of horizontal well pressurization driving tool of the invention, is by top connection (1), stator case (2), elastomer stator (3), screw rod
Rotor (4), spiral shell universal drive shaft (5), universal shaft housing (6), central tube (7), self-aligning bearing (8), magnet ring (9), spring a (10), lock
Rationed marketing (11), sliding block (12), spring b (13), propulsion tube (14), spiral-tube (15), thrust bearing (16), sliding pin (17), bearing
Seat (18), shell body (19), output shaft (20) and anti-cap off (21) are constituted；It is characterized in that：Top connection (1) and upper drilling string silk
Button connection, output shaft (20) and lower drilling string screwed connection；Elastomer stator (3) is fixed on stator case (2) inner chamber, screw rotor
(4) elastomer stator (3) inner chamber is inserted；Stator case (2) upper end and top connection (1) lower end screwed connection, stator case (2) lower end
With universal shaft housing (6) upper end screwed connection；Spiral shell universal drive shaft (5) upper end and screw rotor (4) lower end screwed connection, spiral shell universal drive shaft
(5) lower end and central tube (7) upper end screwed connection；Universal shaft housing (6) inner chamber lower end sets one to enclose raised step, self-aligning bearing
(8) upper surface of universal shaft housing (6) inner chamber lower end raised step is arranged on, magnet ring (9), which is inlayed, is fixed on universal shaft housing (6)
The lower surface of inner chamber lower end raised step, magnet ring (9) has magnetic；The cylindrical top of central tube (7) sets one to enclose raised step, in
Heart pipe (7) upper end is circumferentially uniformly arranged three inclined hole connection interior or exterior spaces, and central tube (7) cylindrical middle part is set to outer six sides；Spiral shell
Cylinder (15) upper end and universal shaft housing (6) lower end screwed connection are revolved, spiral-tube (15) lower end and shell body (19) upper end screw thread connect
Connect；Spiral-tube (15) inner chamber is provided with single thread groove, and single thread groove lower end is set to slope at closing in position；Promote
Cylinder (14) inner chamber is set to interior six side, and the cylindrical top of propulsion tube (14) sets a radial direction counterbore, and propulsion tube (14) upper surface is set
One axial step hole is connected with radial direction counterbore；Sliding block (12) bottom sets an axial counterbore, and sliding block (12) upper end sets a boss,
The cylindrical middle part of sliding block (12) sets a radial direction counterbore, and spring b (13) is arranged in the axial counterbore in sliding block (12) bottom；Stop pin
(11) constituted with permeability magnetic material, stop pin (11) is cylindrical to set one to enclose raised step, and spring a (10) is arranged on stop pin (11) outside
In circle raised step；Stop pin (11) and spring a (10) integral installations are sliding in the axial step hole of propulsion tube (14) upper surface
Block (12) and spring b (13) integral installations are in the radial direction counterbore on propulsion tube (14) cylindrical top；Bearing block (18) lower end is set
For box thread, bearing block (18) cylindrical middle part is circumferentially uniformly arranged eight pin grooves；Shell body (19) inner chamber is circumferentially uniformly arranged
Eight pin chutes；Thrust bearing (16) is arranged on bearing block (18) upper end, bearing block (18) lower end and output shaft (20) upper end
Screwed connection；Bearing block (18) and output shaft (20) integrally insert shell body (19) inner chamber, and eight sliding pins (17) are sequentially arranged at
In the chamber of eight pin chute formation of bearing block (18) eight, cylindrical middle part pin grooves and shell body (19) inner chamber；Shell body
(19) lower end and cap screwed connection is bled off.
The driving tool 2. horizontal well according to claim 1 pressurizes, it is characterised in that：The boss of sliding block (12) upper end
It can be slided in the single thread groove of spiral-tube (15) inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230546.XA CN106958429B (en) | 2017-04-11 | 2017-04-11 | A kind of horizontal well pressurization driving tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230546.XA CN106958429B (en) | 2017-04-11 | 2017-04-11 | A kind of horizontal well pressurization driving tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106958429A true CN106958429A (en) | 2017-07-18 |
| CN106958429B CN106958429B (en) | 2018-11-16 |
Family
ID=59484961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710230546.XA Expired - Fee Related CN106958429B (en) | 2017-04-11 | 2017-04-11 | A kind of horizontal well pressurization driving tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106958429B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104744A (en) * | 2017-12-22 | 2018-06-01 | 西华大学 | A kind of reciprocating wellbore dredging tool |
| CN108222816A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | A kind of continuous jarring formula horizontal well send drill tools |
| CN108533201A (en) * | 2018-05-04 | 2018-09-14 | 西华大学 | A kind of drilling fluid stirring drifting tool |
| CN113863880A (en) * | 2021-10-13 | 2021-12-31 | 西南石油大学 | Repeated putting device for downhole instrument |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110240375A1 (en) * | 2010-04-01 | 2011-10-06 | Lee Oilfield Service Ltd. | Downhole apparatus |
| CN102704840A (en) * | 2012-05-15 | 2012-10-03 | 中国石油大学(华东) | Self-pushed type radial horizontal well steering device |
| CN105201423A (en) * | 2015-09-10 | 2015-12-30 | 西南石油大学 | Hydraulic type continuous pressurizing bit-feeding tool |
| CN105625958A (en) * | 2016-01-07 | 2016-06-01 | 西南石油大学 | Hydraulic pulse type pressurizing drilling column feeding tool |
| CN105735916A (en) * | 2016-03-25 | 2016-07-06 | 西南石油大学 | Crawling horizontal well drill string feed-in tool |
-
2017
- 2017-04-11 CN CN201710230546.XA patent/CN106958429B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110240375A1 (en) * | 2010-04-01 | 2011-10-06 | Lee Oilfield Service Ltd. | Downhole apparatus |
| CN102704840A (en) * | 2012-05-15 | 2012-10-03 | 中国石油大学(华东) | Self-pushed type radial horizontal well steering device |
| CN105201423A (en) * | 2015-09-10 | 2015-12-30 | 西南石油大学 | Hydraulic type continuous pressurizing bit-feeding tool |
| CN105625958A (en) * | 2016-01-07 | 2016-06-01 | 西南石油大学 | Hydraulic pulse type pressurizing drilling column feeding tool |
| CN105735916A (en) * | 2016-03-25 | 2016-07-06 | 西南石油大学 | Crawling horizontal well drill string feed-in tool |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104744A (en) * | 2017-12-22 | 2018-06-01 | 西华大学 | A kind of reciprocating wellbore dredging tool |
| CN108104744B (en) * | 2017-12-22 | 2019-11-29 | 西华大学 | A kind of reciprocating wellbore dredging tool |
| CN108222816A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | A kind of continuous jarring formula horizontal well send drill tools |
| CN108533201A (en) * | 2018-05-04 | 2018-09-14 | 西华大学 | A kind of drilling fluid stirring drifting tool |
| CN108533201B (en) * | 2018-05-04 | 2020-01-14 | 西华大学 | Drilling fluid stirring drifting tool |
| CN113863880A (en) * | 2021-10-13 | 2021-12-31 | 西南石油大学 | Repeated putting device for downhole instrument |
| CN113863880B (en) * | 2021-10-13 | 2023-06-16 | 西南石油大学 | Repeated throwing device for underground instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106958429B (en) | 2018-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106958429A (en) | A kind of horizontal well pressurization driving tool | |
| CN104612582B (en) | Underground vibrating percussion tool based on screw rod Yu Double helix ball screw | |
| CN208534403U (en) | A kind of horizontal well impulse hunting drill feeding facility | |
| US6047778A (en) | Percussion drill assembly | |
| CN106894755B (en) | A kind of waterpower pulse formula is spun helicoid hydraulic motor | |
| CN106639944B (en) | A kind of turbine type downhole hydraulic oscillator | |
| US5957220A (en) | Percussion drill assembly | |
| CN105735916B (en) | A kind of creeping motion type drillstring in horizontal section is sent into instrument | |
| CN106761382A (en) | A kind of deep-well coring device and its operating method | |
| CN105201423B (en) | A kind of hydraulic type continuous pressure send drill tools | |
| CN108625783B (en) | Auxiliary rock breaking tool for underground pressurization | |
| CN206801458U (en) | The axial impact instrument of speed changing function can be realized based on flexible tooth | |
| CN108035679A (en) | A kind of method and pulse screw rod for improving helicoid hydraulic motor percussion drilling ability | |
| CN201225100Y (en) | Screw drilling tool universal joint | |
| CN107461146A (en) | A kind of Yin/Yang rotor all-metal motor helicoid hydraulic motor | |
| CN106050177B (en) | A kind of anti-sticking slider power churn drilling tools | |
| CN113266273A (en) | Turbine-driven near-bit high-frequency axial impact speed-increasing tool | |
| CN107152237B (en) | A kind of large torque self-balancing low speed turbodrill | |
| CN104120971A (en) | Torsion generator for providing one-way impact | |
| CN108222816A (en) | A kind of continuous jarring formula horizontal well send drill tools | |
| CN207701078U (en) | A kind of pulse screw rod | |
| CN104213834A (en) | Drag reduction tool and reciprocating axial process method | |
| CN107165574B (en) | A kind of block stamp formula impact helicoid hydraulic motor | |
| CN204627412U (en) | The lenticular vibratory impulse drilling tool of screw drive | |
| CN113047769B (en) | Rotatable self-adaptive impact drilling tool |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 Termination date: 20190411 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |