CN110306931A - A kind of hydraulic impacter of helical runner driving - Google Patents
A kind of hydraulic impacter of helical runner driving Download PDFInfo
- Publication number
- CN110306931A CN110306931A CN201910477782.0A CN201910477782A CN110306931A CN 110306931 A CN110306931 A CN 110306931A CN 201910477782 A CN201910477782 A CN 201910477782A CN 110306931 A CN110306931 A CN 110306931A
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- China
- Prior art keywords
- plate
- impeller
- impact
- rectifier
- impeller shaft
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- 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.)
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Classifications
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- 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
Abstract
The present invention relates to the hydraulic impacters of helical runner driving, including transmission short circuit, screw fastening, impact chamber, rectifier, impeller shaft, impactor main body；Rectifier open at one end, the other end are equipped with closed plate, and closed plate is equipped with the discharge orifice and sprue of perforation；Impeller shaft is equipped with impeller, and upper mounted plate, bottom plate are respectively equipped in the impeller shaft over and under impeller, and impeller the tip of the axis is equipped with driver plate, and runner mouth is equipped on upper mounted plate and bottom plate, and driver plate is equipped with flowing hole；Impeller shaft is located in rectifier, and driver plate is located at closed plate side and is located above closed plate；Impact chamber is hollow communicating structure, and impact top of chamber is connect with impactor main body screw, and screw fastening is located at impact chamber lower inside, and transmission is shorted one end insertion impact chamber and is threadedly coupled with screw fastening, and is driven to be shorted and be agreed with impact chamber by regular hexagon type face.The problems such as service life that the present invention can solve existing impactor is too short, single-impact power is too small.
Description
Technical field
The invention belongs to the hydraulic impacters that petroleum drilling technology field more particularly to a kind of helical runner drive.
Background technique
With the increase of productive formation depth, productive formation becomes to become increasingly complex, and the difficulty of exploitation increases, especially right
The exploitation of deep-well, ultradeep well, on depth stratum, rock drillability is lower, and drilling process unit drilling depth increases the damage of drill bit
Greatly, penetration rate is slow, and the high problem of drilling cost is more and more prominent.Therefore drilling efficiency is improved, reducing drilling cost is mesh
The critical issue of preceding domestic and international oil drilling industry urgent need to resolve.
Currently, improving the drilling tool of bit speed mainly based on various impactors.Hydraulic impacter can be mentioned effectively
The unit drilling depth time of high PDC drill bit, and because of the hydraulic impacter that can form pulsing jet because having cavitation, it can
To increase substantially drilling efficiency, shorten drilling period, thus drilling cost can be effectively reduced, increases economic efficiency.But
Routine hydraulic impacter is because its structure is complicated at present, and there are many parts to form, and movable part is more, and mechanical wear is big, therefore machine
Tool efficiency is relatively low.Because the vulnerable part that mechanical wear forms impactor is more, service life is short, while having in some impactors
The presence of the stored energy buffering devices such as spring there is impactor ballistic work is low, single-impact power is small, while because the bufferings such as spring are stored up
Energy device shortens the stability problem in the service life and the course of work of hydraulic impacter because of mechanical failure.
Therefore, these problems are based on, provide that a kind of service life for solving existing impactor is too short, single-impact power is too small
The problems such as helical runner driving hydraulic impacter, have important practical significance.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of for solving the service life mistake of existing impactor
The hydraulic impacter of short, the problems such as single-impact power is too small helical runner driving.
The present invention solves its technical problem and adopts the following technical solutions to achieve:
A kind of hydraulic impacter of helical runner driving, including transmission short circuit, screw fastening, impact chamber, rectifier, impeller
Axis, impactor main body；
The rectifier is hollow cylindrical configuration, and the rectifier open at one end, the other end are equipped with closed plate, the envelope
Closing plate is equipped with the discharge orifice and sprue of perforation；The impeller shaft is equipped with impeller, over and under the impeller
Be respectively equipped with upper mounted plate, bottom plate in impeller shaft, the impeller the tip of the axis is equipped with driver plate, fixed plate and under
Runner mouth is equipped in fixed plate, the driver plate is equipped with flowing hole；The impeller shaft is located in the rectifier, and driver plate
Positioned at the closed plate side and it is located above closed plate；
The impact chamber is hollow communicating structure, and the impact top of chamber is connect with the impactor main body screw, described
Screw fastening is located at the impact chamber lower inside, the transmission be shorted one end be inserted into the impact chamber and with the screw fastening screw thread
Connection, and transmission short circuit is agreed with the impact chamber by regular hexagon type face；
The impactor main body, screw fastening, transmission short circuit are hollow structure, so that after liquid is entered by impactor main body
Outflow can be shorted by transmission.
Further, the impact is intracavitary is from top to bottom equipped at least two step structures, so that the rectifier, screw thread
Lock impacts intracavitary be limited described by step structure.
Further, step structure is equipped in the rectifier, so that fixed plate, bottom plate pass through Step-edge Junction
Structure is limited in the reorganizer.
Further, fixed plate, bottom plate pass through inner ring and outer ring is set in the impeller shaft, described
Inner ring and outer ring are the cannula structure that one end extends perpendicularly outward, and outer ring is set on the outside of inner ring, and inner ring is set in impeller
On axis, upper mounted plate, bottom plate are set on outer ring, and one end for extending perpendicularly outward of inner ring and outer ring to upper mounted plate or
The both ends of bottom plate carry out card and set.
Further, the impeller in axial direction Spiral distribution in impeller shaft, and impeller is at least 2, in impeller
Parallel Symmetric is distributed on axis.
Further, the discharge orifice in the closed plate and sprue are spaced apart, and the driver plate is sector structure, and
It is equipped with flowing hole in sector, and can cover or expose the sprue completely when driver plate rotation.
Further, the discharge orifice in the closed plate and sprue are two, and are spaced symmetrical, the transmission
Plate is symmetric fanning structure, and flowing hole is equipped in each sector, and sector driver plate can hide completely when driver plate rotation
Firmly or expose the sprue.
Further, the transmission is shorted lower end inner wall and is connect by screw thread with drill bit.
The advantages and positive effects of the present invention are:
1, the present invention can generate stable periodically pulsing jet stream, and frequency of impact can reach 1000-4000 times/min,
Impact force is 600-1200N；And structure is simple, and without excessive part, it is easy to accomplish, liquid stream is good in intracavitary smoothness, and no reflux is logical
General sealing element can be used in road；It is suitable for high-frequency percussion without the problem of spring fatiguability is broken is worried without spring；Resistance to back pressure
Property it is good, fluid liquid energy utilization rate is high；Stable working performance is a kind of novel, stable, reliable, safety hydraulic impacter, is easy to
Use and popularization in oil field；
2, movement mechanism of the present invention is relatively easy, only has rotational parts in impeller shaft, reduces the probability to break down, and tie
Structure is less, and without excessive energy consumption, single-impact power is big, does not need additionally to supplement energy；
3, the present invention generates strong pulsation collar vortex and provides power for drill bit, can be improved bore the depth of tooth rock cutting with
Speed improves 1.5-3 times of the machine cut rate of drill bit, can effectively save drilling time, improves drill bit utilization rate.
Detailed description of the invention
Technical solution of the present invention is described in further detail below with reference to drawings and examples, but should
Know, these attached drawings are designed for task of explanation, therefore not as the restriction of the scope of the invention.In addition, except non-specifically
It points out, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to be drawn to scale.
Fig. 1 is the structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Fig. 2 is the transmission short-circuit structure schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Fig. 3 is the A-A of Fig. 2 to sectional view；
Fig. 4 is the screw fastening structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Fig. 5 is the impact cavity configuration schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Fig. 6 is the rectifier structure schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Fig. 7 is the B-B direction sectional view of Fig. 6；
Fig. 8 is the top view of Fig. 6；
Fig. 9 is the bottom plate structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Figure 10 is the impeller shaft structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Figure 11 is the upper mounted plate structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Figure 12 is the impactor main structure signal of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving
Figure；
Figure 13 is the C-C of Figure 12 to sectional view；
Figure 14 is the inner ring structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Figure 15 is the outer ring structure schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
Figure 16 is the driver plate structural schematic diagram of the hydraulic impacter of helical runner provided in an embodiment of the present invention driving；
In figure:
1, transmission is shorted 2, impact chamber 3, screw fastening
4, rectifier 5, driver plate 6, bottom plate
7, outer ring 8, inner ring 9, impeller shaft
10, upper mounted plate 11, impactor main body 12, runner mouth
401, closed plate 402, discharge orifice 403, sprue
501, flowing hole 901, impeller
Specific embodiment
Firstly, it is necessary to which explanation, illustrates specific structure of the invention, feature and excellent for by way of example below
Point etc., however what all descriptions were intended merely to be illustrated, and should not be construed as to present invention formation any restrictions.This
Outside, any single technical characteristic for being described by or implying in each embodiment mentioned by this paper, still can be in these technologies spy
Continue any combination between sign (or its equivalent) or delete, to obtain this hair that may do not referred to directly herein
Bright more other embodiments.In addition, same or like technical characteristic in the same figure may be used for the sake of simplifying drawing
It can only be indicated at one.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, in addition, term " includes " and " having " and their any deformation, it is intended that covering is not arranged
His includes, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to clearly
Those of list step or unit, but may include be not clearly listed or for these process, methods, product or equipment
Intrinsic other step or units.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
The present invention just is illustrated in conjunction with Fig. 1 to Figure 16 below.
Embodiment 1
As shown in Fig. 1~16, a kind of hydraulic impacter of helical runner driving provided in this embodiment, including transmission are shorted
1, screw fastening 3, impact chamber 2, rectifier 4, impeller shaft 9, impactor main body 11；
The rectifier 4 is hollow cylindrical configuration, and 4 open at one end of the rectifier, the other end are equipped with closed plate 401,
The closed plate 401 is equipped with the discharge orifice 402 and sprue 403 of perforation；The impeller shaft 9 is equipped with impeller 901, is located at institute
It states and is respectively equipped with upper mounted plate 10, bottom plate 6, the end of the impeller shaft 9 in the impeller shaft 9 over and under impeller 901
Equipped with driver plate 5, runner mouth 12 is equipped on fixed plate 10 and bottom plate 6, the driver plate 5 is equipped with flowing hole
501；The impeller shaft 9 is located in the rectifier 4, and driver plate 5 is located at 401 side of closed plate and is located at closed plate
401 tops；
The impact chamber 2 is hollow communicating structure, and 2 top of impact chamber is threadedly coupled with the impactor main body 11,
The screw fastening 3 is located at 2 lower inside of impact chamber, the transmission be shorted 1 one end be inserted into the impact chamber 2 and with the spiral shell
Line lock 3 is threadedly coupled, and the transmission is shorted 1 and is agreed with the impact chamber 2 by regular hexagon type face, wherein such as Fig. 2, is passed
Dynamic 1 middle position that is shorted is positive hexagonal structure, and impact 2 lower inner of chamber is positive hexagonal structure, so that transmission is shorted 1 and institute
Impact chamber 2 is stated to agree with by regular hexagon type face；
The impactor main body 11, screw fastening 3, transmission short circuit 1 are hollow structure, so that liquid is by impactor main body 11
1 outflow can be shorted by transmission after.
It should be noted that at least two step structures are from top to bottom equipped in the impact chamber 2, as shown in figure 5, making
The rectifier 4, screw fastening 3 are limited in the impact chamber 2 by step structure.
It should be noted that be equipped with step structure in the rectifier 4, as shown in fig. 7, make fixed plate 10,
Bottom plate 6 is limited in the reorganizer 4 by step structure.
For further, it can also consider in the present invention, fixed plate 10, bottom plate 6 pass through inner ring 8
And outer ring 7 is set in the impeller shaft 9；Wherein, the inner ring 8 and outer ring 7 are the casing knot that one end extends perpendicularly outward
Structure, as shown in Figure 14,15, and outer ring 7 is set in the outside of inner ring 8, and inner ring 8 is set in impeller shaft 9, upper mounted plate 10, lower solid
Fixed board 6 is set on outer ring 7, and one end for extending perpendicularly outward of inner ring 8 and outer ring 7 is to upper mounted plate 10 or bottom plate 6
Both ends carry out card and set；It is contemplated that outer ring 7, inner ring 8 are elastic ring, stress concentration can be effectively reduced, and pressure can be passed through
Frictional force caused by clamp force transmits torque.
For further, it can also consider in the present invention, the impeller 901 in axial direction spiral shell in impeller shaft 9
Rotation distribution, and in the present embodiment, impeller 901 is 3, and Parallel Symmetric is distributed in impeller shaft 9.
It should be noted that in the present embodiment, discharge orifice 402 and sprue 403 in the closed plate 401 are two
It is a, and interval is symmetrical, as shown in Figure 8；The driver plate 5 is symmetric fanning structure, as shown in figure 16, and in each sector
It is equipped with flowing hole 501, and sector driver plate can cover completely or expose the sprue 403 when the rotation of driver plate 5,
In the present embodiment, when driver plate 5 rotates, two panels sector structure can cover completely just or expose two symmetrical masters
Runner 403, when turn to cover two symmetrical sprues 403 completely when, fluid is by the flowing hole on fan-shaped driver plate 5
501 and closed plate 401 on discharge orifice 402 in flow out.
It is connect by screw thread with drill bit it should be noted that the transmission is shorted 1 lower end inner wall.
It should be noted that being fixedly connected with mode using bolt mature in the prior art, rivet, welding in the present invention
Equal conventional means, details are not described herein, but will not influence the repetition of those skilled in the art due to the above reasons,.
As an example, the installation method of hydraulic impacter are as follows: screw fastening 3 is put into impact chamber 2 and passes through step structure
Be limited, transmission be shorted 1 regular hexagon face and impact chamber 2 agrees with by regular hexagon type face, the top of transmission short circuit 1 and
Rectifier 4 is put into impact chamber 2 by screw fastening 3 by being threadedly engaged connection, and is limited by step structure；By lower fixation
Driver plate 5 is threaded cooperation connection impeller by inner ring 8,7 elastic ring of outer ring connection cooperation connection impeller shaft 9 by plate 6
Axis 9, then upper mounted plate 10 is connect by outer ring 7, the cooperation of inner ring 8 with impeller shaft 9, by the impeller shaft 9 assembled according to lower solid
Direction of the fixed board 6 under is put into rectifier 4, will finally connect impactor main body 11 with impact chamber 2 by screw thread, and install
Finish.
In the present embodiment, specific work process are as follows: transmission is shorted 1 end and is connect by internal screw thread with drill bit, continuous flow
Body enters upper mounted plate 10 by 11 inner cavity of impactor main body, and fluid impacts impeller shaft 9 by the runner mouth 12 of upper mounted plate 10
Impeller 901 is rotated using the thrust impeller axis 9 of fluid, and continuous fluid becomes the fluid with vortex by impeller shaft 9,
It is flowed out by the runner mouth 12 of bottom plate 6, the sprue can be completely exposed when driver plate 5 turns to fan-shaped driver plate
When 403, fluid by sprue 403 impact chamber 2 in form jet stream, when driver plate 5 turns to fan-shaped driver plate can be complete
When covering the sprue 403, the principal flow passage of fluid is closed, and fluid is by the flowing hole on fan-shaped driver plate 5 at this time
501 and closed plate 401 on discharge orifice 402 in flow out, the purpose of flowing hole 501 and discharge orifice 402 is in order to avoid pressure mistake
Macrolesion element；Wobbler action and driver plate 5 of the continuous fluid in rectifier 4, by the helical runner 901 in impeller shaft 9
Under the collective effect periodically to throttle, the high-speed jet with pulse characteristic can be formed in impact chamber 2, there is pulse characteristic
High-speed pulse jet stream inject in the opposing stationary fluid of liquid environment, easily form flow-disturbing whirlpool, make fluid that resonance occur, it is this humorous
Vibration can be transmitted in the form of pressure wave, formed strong pulse circulation, be formed by pulse circulation and rushed in a manner of pressure wave
Shaft bottom is hit, mechanical rock breaking is assisted, is reduced " chip hold down effect ", bottom-hole flow field is improved, improves jet stream and rock breaking capacity.
In conclusion the service life that the present invention can provide a kind of for solving existing impactor is too short, single-impact power is too small
The problems such as helical runner driving hydraulic impacter.
Above embodiments describe the invention in detail, but content is only the preferred embodiment of the present invention, no
It can be believed to be used to limit the scope of the invention.Any changes and modifications in accordance with the scope of the present application,
It should still fall within the scope of the patent of the present invention.
Claims (8)
1. a kind of hydraulic impacter of helical runner driving, it is characterised in that: including transmission short circuit, screw fastening, impact chamber, rectification
Device, impeller shaft, impactor main body；
The rectifier is hollow cylindrical configuration, and the rectifier open at one end, the other end are equipped with closed plate, the closed plate
It is equipped with the discharge orifice and sprue of perforation；The impeller shaft is equipped with impeller, the impeller over and under the impeller
Upper mounted plate, bottom plate are respectively equipped on axis, the impeller the tip of the axis is equipped with driver plate, fixed plate and lower fixation
Runner mouth is equipped on plate, the driver plate is equipped with flowing hole；The impeller shaft is located in the rectifier, and driver plate is located at
The closed plate side is simultaneously located above closed plate；
The impact chamber is hollow communicating structure, and the impact top of chamber is connect with the impactor main body screw, the screw thread
Lock is located at the impact chamber lower inside, and the transmission is shorted one end and is inserted into the impact chamber and connects with the screw fastening screw thread
It connects, and transmission short circuit is agreed with the impact chamber by regular hexagon type face；
The impactor main body, screw fastening, transmission short circuit are hollow structure, so that liquid can after being entered by impactor main body
Outflow is shorted by transmission.
2. a kind of hydraulic impacter of helical runner driving according to claim 1, it is characterised in that: the impact is intracavitary
At least two step structures are from top to bottom equipped with, so that the rectifier, screw fastening are intracavitary in the impact by step structure
It is limited.
3. a kind of hydraulic impacter of helical runner driving according to claim 1, it is characterised in that: in the rectifier
Equipped with step structure, so that fixed plate, bottom plate are limited in the reorganizer by step structure.
4. a kind of hydraulic impacter of helical runner driving according to claim 1, it is characterised in that: fixed
Plate, bottom plate pass through inner ring and outer ring is set in the impeller shaft, and the inner ring and outer ring are that one end is vertically outside
The cannula structure of extension, and outer ring is set on the outside of inner ring, inner ring is set in impeller shaft, and upper mounted plate, bottom plate are arranged
On outer ring, and one end for extending perpendicularly outward of inner ring and outer ring carries out card to the both ends of upper mounted plate or bottom plate and sets.
5. a kind of hydraulic impacter of helical runner driving according to claim 1, it is characterised in that: the impeller is in leaf
In axial direction Spiral distribution on wheel shaft, and impeller is at least 2, Parallel Symmetric is distributed in impeller shaft.
6. a kind of hydraulic impacter of helical runner driving according to claim 1, it is characterised in that: in the closed plate
Discharge orifice and sprue be spaced apart, the driver plate be sector structure, and in sector be equipped with flowing hole, and driver plate turn
The sprue can be covered or exposed when dynamic completely.
7. a kind of hydraulic impacter of helical runner driving according to claim 6, it is characterised in that: in the closed plate
Discharge orifice and sprue be two, and be spaced symmetrical, the driver plate is symmetric fanning structure, and in each sector
It is equipped with flowing hole, and sector driver plate can cover completely or expose the sprue when driver plate rotation.
8. a kind of hydraulic impacter of helical runner driving according to claim 1, it is characterised in that: the transmission is shorted
Lower end inner wall is connect by screw thread with drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477782.0A CN110306931A (en) | 2019-06-03 | 2019-06-03 | A kind of hydraulic impacter of helical runner driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477782.0A CN110306931A (en) | 2019-06-03 | 2019-06-03 | A kind of hydraulic impacter of helical runner driving |
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| Publication Number | Publication Date |
|---|---|
| CN110306931A true CN110306931A (en) | 2019-10-08 |
Family
ID=68075560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910477782.0A Pending CN110306931A (en) | 2019-06-03 | 2019-06-03 | A kind of hydraulic impacter of helical runner driving |
Country Status (1)
| Country | Link |
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| CN (1) | CN110306931A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905399A (en) * | 2019-11-11 | 2020-03-24 | 中国石油大学(北京) | Hydraulic oscillation axial impactor |
| CN111456624A (en) * | 2020-05-20 | 2020-07-28 | 中国石油集团渤海钻探工程有限公司 | Impeller driving torsion impactor for well drilling |
| CN112796723A (en) * | 2020-12-24 | 2021-05-14 | 长江大学 | Pulse generating device |
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| CN104266826A (en) * | 2014-07-28 | 2015-01-07 | 东北石油大学 | Experiment device and experiment method inside hydraulic oscillation axial shock chamber |
| CN106703686A (en) * | 2017-03-08 | 2017-05-24 | 中国石油天然气集团公司 | Pulsed-jet longitudinal impactor |
| CN107664013A (en) * | 2017-11-07 | 2018-02-06 | 西南石油大学 | Vane type axial and circumferential composite impact device |
| CN109025805A (en) * | 2018-10-10 | 2018-12-18 | 东北石油大学 | Pulsing jet hydraulic impacter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1786409A (en) * | 2005-11-08 | 2006-06-14 | 中国石化集团胜利石油管理局钻井工艺研究院 | Hydraulic pulse well drilling equipment |
| CN104266826A (en) * | 2014-07-28 | 2015-01-07 | 东北石油大学 | Experiment device and experiment method inside hydraulic oscillation axial shock chamber |
| CN106703686A (en) * | 2017-03-08 | 2017-05-24 | 中国石油天然气集团公司 | Pulsed-jet longitudinal impactor |
| CN107664013A (en) * | 2017-11-07 | 2018-02-06 | 西南石油大学 | Vane type axial and circumferential composite impact device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110905399A (en) * | 2019-11-11 | 2020-03-24 | 中国石油大学(北京) | Hydraulic oscillation axial impactor |
| CN111456624A (en) * | 2020-05-20 | 2020-07-28 | 中国石油集团渤海钻探工程有限公司 | Impeller driving torsion impactor for well drilling |
| CN112796723A (en) * | 2020-12-24 | 2021-05-14 | 长江大学 | Pulse generating device |
| CN112796723B (en) * | 2020-12-24 | 2023-01-31 | 长江大学 | Pulse generating device |
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Application publication date: 20191008 |