CN107060638A - Change the power set of drill bit movement - Google Patents
Change the power set of drill bit movement Download PDFInfo
- Publication number
- CN107060638A CN107060638A CN201710243918.2A CN201710243918A CN107060638A CN 107060638 A CN107060638 A CN 107060638A CN 201710243918 A CN201710243918 A CN 201710243918A CN 107060638 A CN107060638 A CN 107060638A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- eccentric
- assembly
- gear
- shaft
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/2809—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels
Abstract
The present invention provides a kind of power set for changing drill bit movement, for providing power to the drill bit of helicoid hydraulic motor, the power set for changing drill bit movement include power assembly, universal axle assembly and the driving-shaft assembly being sequentially connected, also include the eccentric assembly being connected with the driving-shaft assembly, the eccentric assembly is connected with the drill bit so that the axis of power transmission shaft of the drill bit around the driving-shaft assembly does planetary motion；The power set of the embodiment of the present invention, by setting eccentric assembly, make drill bit while with certain rotating speed rotation, also revolved round the sun with certain radius of turn, so as to form compound motion, be easy to expand drilling during drilling well, it is no longer directional drilling in drilling to make drill bit, so as to lift rate of penetration.
Description
Technical field
The present invention relates to drilling technology field, a kind of especially power set for changing drill bit movement.
Background technology
, it is known that helicoid hydraulic motor refers to one kind using liquid as power, the positive displacement underground that liquid pressure energy switchs to mechanical energy is moved
Power drilling tool.Its operation principle is that the drilling fluid for pumping out hydraulic pump flows through by-passing valve with elevated pressures and enters motor, in motor
Import and export forms certain pressure differential, and drive rotor is rotated around the axis of stator, and rotating speed and moment of torsion are passed into drill bit, from
And realize drillng operation.
Helicoid hydraulic motor is applied among drilling well on a large scale, and existing helicoid hydraulic motor is mostly Directional Drilling, Directional Drilling
Rate of penetration is slower, main reason is that directed drilling drilling rod does not turn, by helicoid hydraulic motor drill bit rotation can only be driven to complete broken
Rock, and it is lower closer to center linear velocity during drill bit rotation broken rock.Therefore, how to improve the rate of penetration of helicoid hydraulic motor into
For urgent problem to be solved.
The content of the invention
The embodiments of the invention provide a kind of power set for changing drill bit movement.
To achieve these goals, the embodiment of the present invention is adopted the following technical scheme that：
A kind of power set for changing drill bit movement, for providing power, the change drill bit to the drill bit of helicoid hydraulic motor
The power set of motion include the power assembly, universal axle assembly and the driving-shaft assembly that are sequentially connected, in addition to the transmission
Axle assembly connection eccentric assembly, the eccentric assembly be connected with the drill bit so that drill bit around the driving-shaft assembly transmission
The axis of axle does planetary motion.
Preferably, the eccentric assembly includes：
First housing；
Eccentric shaft, it is connected with one end of the power transmission shaft；
Gear, it is set on the eccentric shaft, has the between the axis of the core wheel of the gear and the power transmission shaft
One eccentric throw, the gear revolves round the sun by radius of turn of first eccentric throw around the axis of the power transmission shaft, the gear
The intermeshing gear teeth are set respectively between wheel rim and first inner walls so that the gear revolution while from
Turn；
Eccentric bushing, it is arranged in first housing, the company of setting between the end face of the eccentric bushing and the gear
Motivation structure, is rotated so that the eccentric bushing does centering with the motion of the gear；The eccentric throw of the eccentric bushing and described first
Eccentric throw length is identical, and the eccentric throw of the eccentric bushing is the second eccentric throw；
Rotary shaft, it is connected and is arranged in the endoporus with the drill bit, and the rotary shaft is felt relieved with the eccentric bushing
Rotate, and the axis by radius of turn of second eccentric throw around the power transmission shaft revolves round the sun simultaneously；And
Flexible piece, it is used to connect the gear and the rotary shaft, makes the rotary shaft transferring certainly with the gear
Rotation.
Preferably, the interlinked mechanism includes：
The axially disposed multiple holes of the axial end of the gear, and
The multiple pillars worn correspondingly in the hole that the end face of the eccentric bushing is set；
Wherein, the outer wall of the pillar is abutted with the inwall in the hole, the center of circle in the axis of the pillar and the hole it
Between have three eccentricity away from, the three eccentricity away from length and first eccentric throw and the identical length of the second eccentric throw
Together.
Preferably, each hole is uniform around the core wheel of the gear.
Preferably, the flexible piece is flexible link, one end of the flexible link is spirally connected the rotary shaft, the flexible link
The other end be spirally connected the eccentric shaft.
Preferably, the power assembly includes stator and the rotor being arranged in the endoporus of the stator, it is described fixed
Sub to have spiral cavity between the rotor, the rotor is by being pressed into the drilling fluid in the spiral cavity in the stator
Endoporus in rotate.
Preferably, the universal axle assembly includes：
Rotor connection, one end of the rotor connection is connected with the rotor；
Connecting rod, one end of the connecting rod is connected with the other end of the rotor connection, the other end of the connecting rod
Connect water cap；And
Second housing, second housing is set in outside the rotor connection, connecting rod and water cap.
Preferably, the connecting rod at least two ends have a flexibility, the connecting rod and the water cap and rotor connection
It is interference fit between two ends.
Preferably, the driving-shaft assembly also includes the journal bearing and cod being set on the power transmission shaft,
One end of the power transmission shaft is connected by the water cap with the other end of the connecting rod；The driving-shaft assembly also includes being arranged
The 3rd housing outside the journal bearing and cod, one end of the 3rd housing is connected with second housing, institute
The other end for stating the 3rd housing is connected with first housing.
The power set of the change drill bit movement of the embodiment of the present invention, by setting eccentric assembly, make drill bit with certain
While rotating speed rotation, also revolved round the sun with certain radius of turn, so as to form compound motion, be easy to expand drilling during drilling well, make
Drill bit is no longer directional drilling in drilling, so as to lift rate of penetration.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Accompanying drawing is briefly described.It should be evident that drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the sectional view of the power set of the change drill bit movement of the embodiment of the present invention；
Fig. 2 is Section A-A schematic diagram in Fig. 1；
Fig. 3 is section B-B schematic diagram in Fig. 1.
The universal axle assembly 21- connecting rods 22- water caps 23- rotor connections of 1- power assembly 11- rotor 12- stators 2-
24- the second housing 3- driving-shaft assembly 31- power transmission shaft 311- eccentric shaft 32- journal bearing 33- cods 34- the 3rd
Housing 4- bias assembly 41- gear 411- holes 42- flexible piece 43- rotary shaft 44- eccentric bushing 441- pillars 45- first
Housing M- drill bits.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
It is different from other manner described here using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
Secondly, the present invention is described in detail with reference to schematic diagram, when the embodiment of the present invention is described in detail, for purposes of illustration only, and
And the schematic diagram is example, it should not limit the scope of protection of the invention herein.
Fig. 1 for the embodiment of the present invention change drill bit movement power set sectional view, reference picture 1, the present embodiment is carried
For a kind of power set for changing drill bit movement, for providing power to the drill bit of helicoid hydraulic motor, the change drill bit movement
Power set include power assembly 1, universal axle assembly 2, driving-shaft assembly 3 and the eccentric assembly 4 being sequentially connected, the bias
Assembly 4 is connected with the drill bit M so that drill bit M does planetary motion, this reality around the axis of the power transmission shaft 31 of the driving-shaft assembly 3
Apply in example, rotating speed and moment of torsion that described power assembly 1 is produced are translated into fixed-axis rotation by the universal axle assembly 2,
And the eccentric assembly 4 is passed to by the driving-shaft assembly 3, fixed-axis rotation is transformed into planetary motion by eccentric assembly 4.This
Invention makes drill bit M during broken rock be changed into planetary motion, i.e. drill bit M while rotation also with revolution from simple spinning motion,
Form compound drilling well, its speed is 3-5 times of directed drilling, so as to greatly improve drill bit M broken rock speed, reduction drilling well into
This.
It is preferred that, the eccentric assembly 4 includes the first housing 45, and the bias being connected with one end of the power transmission shaft 31
It is to be spirally connected or integral type between eccentric shaft 311 and power transmission shaft 31 in axle 311, the present embodiment；The eccentric assembly
4 also include gear 41, and it is set on the eccentric shaft 311, the axis of the core wheel of the gear 41 and the power transmission shaft 31 it
Between there is the first eccentric throw, the gear 41 is radius of turn around described using first eccentric throw under the drive of power transmission shaft 31
The axis revolution of power transmission shaft 31, sets intermeshing respectively between the wheel rim of the gear 41 and the inwall of the first housing 45
The gear teeth, so that rotation while revolution of the gear 41；The eccentric assembly 4 also includes eccentric bushing 44, and it is arranged at described
In first housing 45, interlinked mechanism is set between the end face and the gear 41 of the eccentric bushing 44, so that the eccentric bushing
44 do centering with the motion of the gear 41 rotates；The eccentric throw of the eccentric bushing 44 is identical with the first eccentric throw length,
The eccentric throw of the eccentric bushing is the second eccentric throw, and the eccentric throw of eccentric bushing 44 refers to the axis of eccentric bushing 44 (i.e. eccentric bushing 44
The axis of itself) and the eccentric bushing 44 endoporus the center of circle between the eccentric throw that has；It is described eccentric total shown in reference picture 3
Into 4 also include rotary shaft 43, it is connected and is arranged in the endoporus of eccentric bushing 44 with the drill bit M, make the rotary shaft 43 with
The centering of eccentric bushing 44 is rotated, while the axis by radius of turn of second eccentric throw around the power transmission shaft 31 revolves round the sun,
In the present embodiment, it is clamping between the drill bit M and the rotary shaft 43, is spirally connected, the eccentric assembly 4 also includes flexible piece
42, it is used to connect the gear 41 and the rotary shaft 43, the rotary shaft 43 is transferred rotation certainly with the gear 41.
In the present embodiment, shown in reference picture 2, one end of the power transmission shaft 31 of driving-shaft assembly 3 by setting eccentric shaft 311,
The centering of power transmission shaft 31 is converted into eccentric rotary, the gear 41 on the eccentric shaft 311 is set in the first eccentric throw
Axis for radius of turn around power transmission shaft 31 is revolved round the sun, and phase is set between the wheel rim of the gear 41 and the inwall of the first housing 45
The gear teeth mutually engaged, make in rotation while revolution of gear 41, the present embodiment, the shape of the gear teeth is as shown in Fig. 2 first
The gear teeth of the inwall of housing 45 are equal with modulus and the pressure angle difference of the gear teeth of the wheel rim of gear 41, i.e., both nibble for involute gear
Close, by such structure, make drill bit M while with certain rotating speed rotation, be also radius of turn around biography using the first eccentric throw
The axis revolution of moving axis 31, so as to form compound motion, is easy to expand drilling, so as to lift bit speed in broken rock.
It is preferred that, shown in reference picture 1, axially disposed multiple of the axial end of the interlinked mechanism including the gear 41
Hole 411, and the eccentric bushing 44 end face set the multiple pillars 441 being located in correspondingly in the hole 411；
Wherein, the outer wall of the pillar 441 is abutted with the inwall in the hole 411, the axis of the pillar 441 and the circle in the hole 411
Have between the heart three eccentricity away from, the three eccentricity away from length and first eccentric throw and the second eccentric throw length it is equal
It is identical.
In the present embodiment, the gear 41 is while planetary motion is done, the multiple holes set in the axial end of gear 41
411 also do planetary motion together, and the inwall in hole 411 abuts to drive eccentric bushing 44 to transport with the outer wall of pillar 441 of eccentric bushing 44
It is dynamic, and have between the axis of pillar 441 and the center of circle in hole 411 and the length identical of the first eccentric throw and the second eccentric throw the
Three eccentricity is away from the revolution in hole 411 is cancelled, and the rotation for exporting eccentric bushing 44 is converted into centering and rotated, and such structure is more
Precision, preferably delivers moment of torsion and rotating speed.
It is preferred that, each hole 411 is uniform, it is necessary to each in explanation, the present embodiment around the core wheel of the gear 41
The center of circle in hole 411 is identical with the distance between the core wheel of the gear 41, so that the conduction of the moment of torsion and rotation in all directions
It is more balanced.
It is preferred that, the flexible piece 42 is flexible link, and one end of the flexible link is spirally connected the rotary shaft 43, the flexibility
The other end of bar is spirally connected the eccentric shaft 311, and in the present embodiment, the flexible link mainly plays universal drive shaft, and flexible link can
So that using titanium alloy material support, flexible link is offset from stress axially or radially when rotating, it is to avoid because of dimensional discrepancy
Caused mechanism rotates not smooth, it is necessary to which in explanation, the present embodiment, the flexible piece 42 can also be used the two of rigid rod
End set flexible connecting member form formed, the flexible piece 42 can also by the two ends of rigid rod set ball formed,
It can certainly can play the structure of universal drive shaft using other, not repeat one by one herein.
It is preferred that, shown in reference picture 1, the power assembly 1 includes stator 12 and is arranged on the endoporus of the stator 12
In rotor 11, between the stator 12 and the rotor 11 have spiral cavity, what the rotor 11 was excluded by hydraulic pump
Drilling fluid is pressed into the spiral cavity with elevated pressures makes the rotor 11 be rotated in the endoporus of the stator 12.
In above-described embodiment, specifically, the universal axle assembly 2 includes rotor connection 23, the one of the rotor connection 23
End is connected with the rotor 11；The universal axle assembly 2 also includes connecting rod 21, one end and the rotor of the connecting rod 21
The other end connection of joint 23, the other end connection water cap 22 of the connecting rod 21；The universal axle assembly 2 also includes second shell
Body 24, second housing 24 is set in outside the rotor connection 23, connecting rod 21 and water cap 22, in the present embodiment, and described ten thousand
The rotation that rotor 11 is exported is converted into after centering is rotated to axle assembly 2 and exports moment of torsion and rotating speed to driving-shaft assembly 3, specifically
, the connecting rod 21 at least two ends have a flexibility, the two ends of the connecting rod 21 and the water cap 22 and rotor connection 23 it
Between be interference fit.
It is preferred that, shown in reference picture 1, in above-described embodiment, the driving-shaft assembly 3 also includes being set in the power transmission shaft
Journal bearing 32 and cod 33 on 31, the journal bearing 32 are used to bear radial load, and the cod 33 is used
In bearing axial load, one end of the power transmission shaft 31 is connected by the water cap 22 with the other end of the connecting rod 21；Institute
State the 3rd housing 34 that driving-shaft assembly 3 also includes being set in outside the journal bearing 32 and cod 33, the 3rd shell
One end of body 34 is connected with second housing 24, in the present embodiment be specially be spirally connected, the other end of the 3rd housing 34 with
First housing 45 is connected, and is specially to be spirally connected in the present embodiment, first housing 45, the second housing 24 and the 3rd housing 34
For said structure to be separated with 411 inwall rock stratum of drilling, shield.
Above example is only the exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can make respectively in the essence and protection domain of the present invention to the present invention
Modification or equivalent substitution are planted, this modification or equivalent substitution also should be regarded as being within the scope of the present invention.
Claims (9)
1. a kind of power set for changing drill bit movement, for providing power, described power set to the drill bit of helicoid hydraulic motor
Including the power assembly, universal axle assembly and driving-shaft assembly being sequentially connected, it is characterised in that also including total with the power transmission shaft
Into the eccentric assembly of connection, the eccentric assembly is connected with the drill bit so that drill bit is around the power transmission shaft of the driving-shaft assembly
Axis does planetary motion.
2. the power set according to claim 1 for changing drill bit movement, it is characterised in that the eccentric assembly includes：
First housing；
Eccentric shaft, it is connected with one end of the power transmission shaft；
Gear, it is set on the eccentric shaft, inclined with first between the axis of the core wheel of the gear and the power transmission shaft
The heart is away from the gear revolves round the sun by radius of turn of first eccentric throw around the axis of the power transmission shaft, the wheel rim of the gear
The intermeshing gear teeth are set respectively between first inner walls, so that gear rotation while revolution；
Eccentric bushing, it is arranged in first housing, and gearing machine is set between the end face of the eccentric bushing and the gear
Structure, is rotated so that the eccentric bushing does centering with the motion of the gear；The eccentric throw of the eccentric bushing is eccentric with described first
Distance degree is identical, and the eccentric throw of the eccentric bushing is the second eccentric throw；
Rotary shaft, it is connected and is arranged in the endoporus with the drill bit, and the rotary shaft is felt relieved with the eccentric bushing and rotated,
And the axis by radius of turn of second eccentric throw around the power transmission shaft revolves round the sun simultaneously；And
Flexible piece, it is used to connect the gear and the rotary shaft, the rotary shaft is transferred rotation certainly with the gear.
3. the power set according to claim 2 for changing drill bit movement, it is characterised in that the interlinked mechanism includes：
The axially disposed multiple holes of the axial end of the gear, and
The multiple pillars worn correspondingly in the hole that the end face of the eccentric bushing is set；
Wherein, the outer wall of the pillar is abutted with the inwall in the hole, is had between the center of circle in the axis of the pillar and the hole
Have three eccentricity away from, the three eccentricity away from length and first eccentric throw and the second eccentric throw identical length it is same.
4. the power set according to claim 3 for changing drill bit movement, it is characterised in that each hole is around the gear
Core wheel it is uniform.
5. the power set according to claim 3 for changing drill bit movement, it is characterised in that the flexible piece is flexibility
Bar, one end of the flexible link is spirally connected the rotary shaft, and the other end of the flexible link is spirally connected the eccentric shaft.
6. according to the power set of any described change drill bit movement in claim 2 to 5, it is characterised in that the power
Assembly includes stator and the rotor being arranged in the endoporus of the stator, has screw type between the stator and the rotor
Chamber, the rotor is rotated by the drilling fluid being pressed into the spiral cavity in the endoporus of the stator.
7. the power set according to claim 6 for changing drill bit movement, it is characterised in that the universal axle assembly bag
Include：
Rotor connection, one end of the rotor connection is connected with the rotor；
Connecting rod, one end of the connecting rod is connected with the other end of the rotor connection, the other end connection of the connecting rod
Water cap；And
Second housing, second housing is set in outside the rotor connection, connecting rod and water cap.
8. the power set according to claim 7 for changing drill bit movement, it is characterised in that the connecting rod at least two ends
It is interference fit with flexibility, between the connecting rod and the water cap and the two ends of rotor connection.
9. the power set according to claim 7 for changing drill bit movement, it is characterised in that the driving-shaft assembly is also wrapped
The journal bearing and cod being set on the power transmission shaft are included, one end of the power transmission shaft passes through the water cap and the company
The other end connection of extension bar；The driving-shaft assembly also includes the 3rd shell being set in outside the journal bearing and cod
Body, one end of the 3rd housing is connected with second housing, and the other end and first housing of the 3rd housing connect
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710243918.2A CN107060638B (en) | 2017-04-14 | 2017-04-14 | Power device for changing drill bit movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710243918.2A CN107060638B (en) | 2017-04-14 | 2017-04-14 | Power device for changing drill bit movement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107060638A true CN107060638A (en) | 2017-08-18 |
| CN107060638B CN107060638B (en) | 2023-09-26 |
Family
ID=59600312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710243918.2A Active CN107060638B (en) | 2017-04-14 | 2017-04-14 | Power device for changing drill bit movement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107060638B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109396192A (en) * | 2018-11-20 | 2019-03-01 | 北京京诚之星科技开发有限公司 | Centring machine |
| CN110984845A (en) * | 2019-12-31 | 2020-04-10 | 中国石油集团川庆钻探工程有限公司 | Well drilling speed increasing method for changing bottom hole confining pressure distribution by middle energy accumulation |
| CN111594136A (en) * | 2020-04-28 | 2020-08-28 | 重庆科技学院 | Multifunctional power drilling tool experiment platform |
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| CA2383668A1 (en) * | 2001-05-09 | 2002-11-09 | Schlumberger Canada Limited | Rotary steerable drilling tool |
| CN101694149A (en) * | 2009-10-23 | 2010-04-14 | 杨天博 | Deep well drilling speed reducer and working method thereof |
| CN103410444A (en) * | 2013-07-19 | 2013-11-27 | 扬州天业石油机械有限公司 | Waterpower oscillator |
| CN104847257A (en) * | 2015-04-20 | 2015-08-19 | 江汉石油钻头股份有限公司 | Screw drill motor |
| CN205445460U (en) * | 2015-12-29 | 2016-08-10 | 中石化石油工程技术服务有限公司 | Rock device is broken to planet milling formula |
| CN106089024A (en) * | 2016-06-17 | 2016-11-09 | 中国海洋石油总公司 | A kind of torsion rushes motor |
| CN206035378U (en) * | 2016-08-29 | 2017-03-22 | 盐城市荣嘉机械制造有限公司 | Screw drilling tool |
| CN206753485U (en) * | 2017-04-14 | 2017-12-15 | 奥瑞拓能源科技股份有限公司 | Change the power set of drill bit movement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2383668A1 (en) * | 2001-05-09 | 2002-11-09 | Schlumberger Canada Limited | Rotary steerable drilling tool |
| CN101694149A (en) * | 2009-10-23 | 2010-04-14 | 杨天博 | Deep well drilling speed reducer and working method thereof |
| CN103410444A (en) * | 2013-07-19 | 2013-11-27 | 扬州天业石油机械有限公司 | Waterpower oscillator |
| CN104847257A (en) * | 2015-04-20 | 2015-08-19 | 江汉石油钻头股份有限公司 | Screw drill motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396192A (en) * | 2018-11-20 | 2019-03-01 | 北京京诚之星科技开发有限公司 | Centring machine |
| CN109396192B (en) * | 2018-11-20 | 2023-08-29 | 北京京诚瑞信长材工程技术有限公司 | Centering machine |
| CN110984845A (en) * | 2019-12-31 | 2020-04-10 | 中国石油集团川庆钻探工程有限公司 | Well drilling speed increasing method for changing bottom hole confining pressure distribution by middle energy accumulation |
| CN111594136A (en) * | 2020-04-28 | 2020-08-28 | 重庆科技学院 | Multifunctional power drilling tool experiment platform |
| CN111594136B (en) * | 2020-04-28 | 2022-04-29 | 重庆科技学院 | Multifunctional power drilling tool experiment platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107060638B (en) | 2023-09-26 |
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