CN108678656B - Non-contact type strong magnetic impactor - Google Patents
Non-contact type strong magnetic impactor Download PDFInfo
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- CN108678656B CN108678656B CN201810715634.3A CN201810715634A CN108678656B CN 108678656 B CN108678656 B CN 108678656B CN 201810715634 A CN201810715634 A CN 201810715634A CN 108678656 B CN108678656 B CN 108678656B
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- piston
- disc
- valve disc
- impact
- piston cylinder
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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
- E21B1/00—Percussion drilling
- E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
Abstract
The invention relates to an impactor, in particular to a non-contact type strong magnetic impactor. The upper pipe body and the lower pipe body are connected through threads, a rotating shaft is arranged in the upper pipe body, a movable valve disc is arranged at the lower end of the rotating shaft, and a static valve disc is arranged above the movable valve disc; a piston cylinder is arranged in the lower pipe body, a piston impact rod is arranged in the piston cylinder, an annular impact strong magnet is arranged on the piston impact rod, and an annular force transmission strong magnet is arranged in the lower pipe body; the piston impact rod intermittently extends into the annular force-transmitting strong magnet. The non-contact strong magnetic impactor is matched with the axial pulse impact force of drilling fluid and acts on the drill bit together through homopolar repulsive force generated by the annular impact strong magnet and the annular force transmission strong magnet; the purpose of assisting rock breaking and improving drilling efficiency is achieved; the contact type impact device has the advantages of effectively avoiding damage to tools caused by contact type impact of the existing impact device, prolonging the service life of the impact device, being stable in performance and high in drilling efficiency, and having positive significance in reducing drilling cost.
Description
Technical Field
The invention relates to an impactor, in particular to a non-contact type strong magnetic impactor.
Background
Along with the continuous progress and development of the scientific technology, the drilling technology also gradually makes a certain progress, and the drilling engineering gradually develops to the drilling fields with severe conditions such as deep and ultra-deep environments; however, many problems are encountered in the development process of a well in a deep environment, and the problems are mainly represented in the aspects of difficult rock breaking caused by factors such as rock density and friction resistance increase, low rock breaking efficiency of a drill bit, greatly reduced service life, greatly reduced drilling speed and the like; although hydraulic impactors capable of generating axial impact exist at present, the impactors are combined by adopting a guide disc and a hydraulic mechanism so as to generate axial pulse by utilizing hydraulic pressure, and a hydraulic piston drives an impact head to directly impact a drill bit joint; however, these devices have certain drawbacks due to structural reasons, such as being easy to cause unable return stroke due to drilling fluid resistance and viscous action, and the performance of the whole impactor is unstable, so that the service life of the impactor is shortened, even the impactor fails, and huge economic loss is caused.
Disclosure of Invention
The invention aims at: the non-contact type strong magnetic impactor can effectively solve the problem that the whole impactor is unstable in performance due to the fact that the existing impactor cannot return due to drilling fluid resistance and viscous action.
The technical scheme of the invention is as follows:
the utility model provides a non-contact strong magnetism impacter, includes body, lower body, pivot, piston cylinder, piston impact rod, moves valve disc and quiet valve disc, its characterized in that: the upper pipe body and the lower pipe body are connected through threads, an upper joint is arranged on the upper pipe body through threads, a lower joint is arranged on the lower pipe body through threads, a rotating shaft is arranged in the upper pipe body below the upper joint through a centralizing bearing and a turbine component, a movable valve disc is arranged at the end head of the lower end of the rotating shaft through a fixing screw, and a static valve disc is fixedly arranged in the upper pipe body above the movable valve disc; a piston cylinder is arranged in the lower pipe body and is in sliding sealing connection with the movable valve disc; a piston impact rod is arranged in the piston cylinder, one end of the piston impact rod extends to the lower part of the piston cylinder, and a drainage disc is fixedly arranged at the top end of the piston impact rod in the piston cylinder and is in sliding sealing connection with the inner wall of the piston cylinder; an annular impact strong magnet is sleeved on the piston impact rod below the drainage disc through a seal head nut, and an annular force transmission strong magnet is fixedly arranged in the lower pipe body below the piston impact rod through an axial fixing ring; one end of the piston impact rod intermittently extends into the annular force-transmitting strong magnet.
The central hole of the lower joint is a shrinkage hole.
The leakage flow disc is cylindrical, assembly grooves are axially symmetrically formed in the circumference of the leakage flow disc, and plugs are movably mounted in the assembly grooves through compression springs.
The top of the drainage disc is fixedly provided with a sealing plate which is in sliding sealing connection with the upper end face of the plug.
The diameter of the sealing plate is smaller than that of the drain pan.
And the bottoms of the piston cylinders on two sides of the piston impact rod are symmetrically provided with drainage holes.
Corresponding liquid flow inner holes are respectively arranged on the movable valve disc and the static valve disc, and corresponding liquid flow outer holes are respectively arranged on the movable valve disc and the static valve disc at the periphery of the liquid flow inner holes. The movable valve disc and the static valve disc are connected in a sliding sealing way.
Protrusions are symmetrically arranged in the piston cylinder below the drainage disc.
Compared with the prior art, the invention has the beneficial effects that:
the non-contact strong magnetic impactor drives the annular impact strong magnet to move downwards through the piston impact rod under the pushing of hydraulic force, and transmits force under the action of homopolar repulsive force of the annular impact strong magnet and the annular force transmission strong magnet, so that axial impact force is generated and the axial impact force of periodical drilling fluid generated by the rotation of the static valve disc and the dynamic valve disc is matched to act on the drill bit; thereby realizing the purpose of assisting in breaking rock. The non-contact impact mode of the non-contact strong magnetic impactor can effectively avoid damage to the tool caused by contact impact, and prolong the service life of the tool.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;
FIG. 3 is a schematic top view of the drain pan of the present invention with the seal plate removed;
FIG. 4 is a schematic illustration of a plug and bump contact of a drain pan of the present invention.
In the figure: 1. the device comprises an upper pipe body, 2, a lower pipe body, 3, a rotating shaft, 4, a piston cylinder, 5, a piston impact rod, 6, a movable valve disc, 7, a static valve disc, 8, an upper joint, 9, a lower joint, 10, a righting bearing, 11, a turbine component, 12, a fixing screw, 13, a liquid inner hole, 14, a liquid outer hole, 15, a connecting lug, 16, a leakage flow disc, 17, an assembly groove, 18, a compression spring, 19, a plug, 20, a sealing plate, 21, a head nut, 22, an annular impact strong magnet, 23, an axial fixing ring, 24, an annular force transmission strong magnet, 25, a bulge, 26, a leakage flow hole, 27 and a shrinkage hole.
Detailed Description
The non-contact strong magnetic impactor comprises an upper tube body 1, a lower tube body 2, a rotating shaft 3, a piston cylinder 4, a piston impact rod 5, a movable valve disc 6 and a static valve disc 7. The upper pipe body 1 and the lower pipe body 2 are connected through threads, an upper joint 8 is arranged on the upper pipe body 1 through threads, a lower joint 9 is arranged on the lower pipe body 2 through threads, and a shrinkage hole 27 is formed in the central hole of the lower joint 9. The rotating shaft 3 is arranged in the upper pipe body 1 below the upper joint 8 through a centralizing bearing 10 and a turbine component 11, and the turbine component 11 consists of a turbine rotor and a turbine stator. The lower end head of the rotating shaft 3 is provided with a movable valve disc 6 through a fixing screw 12, and a static valve disc 7 is fixedly arranged in the upper pipe body 1 above the movable valve disc 6. The movable valve disc 6 and the static valve disc 7 are respectively provided with a corresponding liquid flow inner hole 13, and the movable valve disc 6 and the static valve disc 7 at the periphery of the liquid flow inner hole 13 are respectively provided with a corresponding liquid flow outer hole 14. The sliding seal connection between the movable valve disk 6 and the static valve disk 7 is realized, and intermittent communication is realized between the inner liquid flow holes 13 and the outer liquid flow holes 14 during the mutual rotation between the movable valve disk 6 and the static valve disk 7.
A piston cylinder 4 is arranged in the lower pipe body 2, and the piston cylinder 4 is in sliding sealing connection with a movable valve disc 6; the piston cylinder 4 is fixed in the lower tube body 2 by means of its circumferential connecting lugs 15. A piston impact rod 5 is arranged in the piston cylinder 4, one end of the piston impact rod 5 extends to the lower side of the piston cylinder 4, and drain holes 26 are symmetrically arranged at the bottoms of the piston cylinders 4 at two sides of the piston impact rod 5. A drain disc 16 is fixedly arranged at the top end of the piston impact rod 5 in the piston cylinder 4, and the drain disc 16 is in sliding sealing connection with the inner wall of the piston cylinder 4. The drain plate 16 is cylindrical, the circumference of the drain plate 16 is axially symmetrically provided with an assembly groove 17, and a plug 19 is movably arranged in the assembly groove 17 through a compression spring 18. The bottom of the plug 19 is tapered; a sealing plate 20 is fixedly arranged at the top of the drain pan 16, and the diameter of the sealing plate 20 is smaller than that of the drain pan 16. The sealing plate 20 is in sliding sealing connection with the upper end face of the plug 19. The purpose of the sealing plate 20 is to form a semi-closure to the upper port of the fitting groove 17; the semi-plugged sealing plate 20 is matched with the plug 19 to form a plug for the upper port of the assembly groove 17, and then the plug 19 is matched with the drain plates 16 on two sides of the assembly groove 17 to form integral sealing on the circumference of the inner cavity of the piston cylinder 4, so that drilling fluid is drained through the drain plates 16 in a non-working state.
An annular impact strong magnet 22 is sleeved on the piston impact rod 5 below the leakage flow disc 16 through a seal head nut 21, and an annular force transmission strong magnet 24 is fixedly arranged in the lower pipe body 2 below the piston impact rod 5 through an axial fixing ring 23; in operation, the annular impact magnet 22 is intermittently extended into the annular force transmitting magnet 24 by the piston impact rod 5.
Projections 25 are symmetrically arranged in the piston cylinder 4 below the leakage flow disc 16 of the non-contact type strong magnetic impactor, and the plug 19 is in intermittent contact connection with the projections 25.
When the non-contact strong magnetic impactor is used for drilling, drilling fluid flows from the center of the upper joint 8 to the turbine component 11, and the turbine rotor drives the rotating shaft 3 to rotate under the hydraulic action of the drilling fluid, so that the movable valve disc 6 is driven to rotate, and the liquid flow inner hole 13 and the liquid flow outer hole 14 on the static valve disc 7 are alternately communicated with the liquid flow inner hole 13 and the liquid flow outer hole 14 on the movable valve disc 6; drilling fluid flowing from the turbine assembly 11 enters the annulus above the static valve disc 7 and then flows into the inner flow bore 13 and the outer flow bore 14 of the static valve disc 7; since the inner liquid flow hole 13 and the outer liquid flow hole 14 on the movable valve disk 6 and the static valve disk 7 are respectively arranged at intervals;
when the liquid flow inner hole 13 of the static valve disc 7 is completely communicated with the liquid flow inner hole 13 on the movable valve disc 6, drilling fluid flows into the piston cylinder 4 and pushes the piston impact rod 5 to move downwards through the leakage flow disc 16, so that the annular impact strong magnet 22 is driven to move downwards, impact force is transmitted to the annular force transmission strong magnet 24 under the action of homopolar repulsive force of the magnet, and impact is transmitted to the drill bit.
The piston impact rod 5 drives the annular impact strong magnet 22 to continuously move downwards, in the process, the plug 19 on the drainage disc 16 gradually contacts with the bulge 25, the bulge 25 presses the plug 19 to force the plug 19 to shrink inwards, a gap is formed between the plug 19 and the inner wall of the piston cylinder 4, a drainage channel is opened, and drilling fluid in the piston cylinder 4 is discharged out of the piston cylinder 4 through two sides of the bulge 25 and the drainage hole 26; during this process, the inner flow holes 13 of the movable valve disk 6 and the stationary valve disk 7 are gradually closed, and the outer flow holes 14 of the movable valve disk 6 and the stationary valve disk 7 are gradually communicated.
When the inner liquid flow holes 13 on the movable valve disc 6 and the static valve disc 7 are completely closed and the outer liquid flow holes 14 on the movable valve disc 6 and the static valve disc 7 are completely communicated, the drilling fluid flowing out of the turbine assembly 11 flows into the annular force-transmitting strong magnet 24 below the head nut 21 through the outer liquid flow holes 14 on the movable valve disc 6 and the static valve disc 7, and at the moment, the piston impact rod 5 is pushed to reset under the combined action of repulsive force of the magnet and drilling fluid pressure. The rotation of the movable valve disc 6 makes the inner liquid flow hole 13 and the outer liquid flow hole on the movable valve disc 6 and the static valve disc 7 alternately communicated; the drilling fluid forms periodic axial pulses, and the drilling fluid forming the periodic axial pulses is sprayed onto the rock at the bottom of the well through the shrinkage hole 27 of the lower joint 9 and the water hole on the drill bit, so that the aim of assisting in breaking the rock can be fulfilled.
The non-contact strong magnetic impactor is matched with the axial pulse impact force of drilling fluid and acts on a drill bit together through homopolar repulsive force generated by the annular impact strong magnet 22 and the annular force transmission strong magnet 24; the purpose of assisting rock breaking and improving drilling efficiency is achieved; the contact type impact device has the advantages of effectively avoiding damage to tools caused by contact type impact of the existing impact device, prolonging the service life of the impact device, being stable in performance and high in drilling efficiency, and having positive significance in reducing drilling cost.
Claims (3)
1. The utility model provides a strong magnetic impactor of non-contact, including last body (1), lower body (2), pivot (3), piston cylinder (4), piston impact rod (5), move valve disc (6) and quiet valve disc (7), go up threaded connection each other between body (1) and the lower body (2), go up threaded connection on body (1), lower body (2) go up threaded connection (9) down, install pivot (3) through righting bearing (10) and turbine assembly (11) in last body (1) of upper connection (8) below, its characterized in that: the lower end head of the rotating shaft (3) is provided with a movable valve disc (6) through a fixed screw (12), and a static valve disc (7) is fixedly arranged in the upper pipe body (1) above the movable valve disc (6); a piston cylinder (4) is arranged in the lower pipe body (2), and the piston cylinder (4) is in sliding sealing connection with a movable valve disc (6); a piston impact rod (5) is arranged in the piston cylinder (4), one end of the piston impact rod (5) extends to the lower part of the piston cylinder (4), a drainage disc (16) is fixedly arranged at the top end of the piston impact rod (5) in the piston cylinder (4), and the drainage disc (16) is in sliding sealing connection with the inner wall of the piston cylinder (4); an annular impact strong magnet (22) is sleeved on the piston impact rod (5) below the drainage disc (16) through a seal head nut (21), and an annular force transmission strong magnet (24) is fixedly arranged in the lower pipe body (2) below the piston impact rod (5) through an axial fixing ring (23); one end of the piston impact rod (5) intermittently extends into the annular force transmission strong magnet (24);
the leakage flow disc (16) is cylindrical, assembly grooves (17) are axially symmetrically formed in the circumference of the leakage flow disc (16), and plugs (19) are movably arranged in the assembly grooves (17) through compression springs (18);
projections (25) are symmetrically arranged in the piston cylinder (4) below the drainage disc (16); in the working process, the piston impact rod drives the annular impact strong magnet to move downwards, in the process, the plug (19) on the drainage disc (16) is gradually contacted with the bulge (25), the bulge (25) extrudes the plug (19) to force the plug (19) to shrink inwards, a gap is formed between the plug (19) and the inner wall of the piston cylinder (4), the drainage channel is opened, and drilling fluid in the piston cylinder (4) is discharged out of the piston cylinder (4) through two sides of the bulge (25) and the drainage hole (26);
the top of the drainage disc (16) is fixedly provided with a sealing plate (20), and the sealing plate (20) is in sliding sealing connection with the upper end face of the plug (19);
the bottoms of the piston cylinders (4) at two sides of the piston impact rod (5) are symmetrically provided with drain holes (26);
corresponding liquid flow inner holes (13) are respectively arranged on the movable valve disc (6) and the static valve disc (7), and corresponding liquid flow outer holes (14) are respectively arranged on the movable valve disc (6) and the static valve disc (7) at the periphery of the liquid flow inner holes (13); the movable valve disk (6) and the static valve disk (7) are connected in a sliding sealing way.
2. A non-contact ferromagnetic impactor as defined in claim 1, wherein: the central hole of the lower joint (9) is a shrinkage hole (27).
3. A non-contact ferromagnetic impactor as defined in claim 1, wherein: the diameter of the sealing plate (20) is smaller than that of the leakage flow disc (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810715634.3A CN108678656B (en) | 2018-07-03 | 2018-07-03 | Non-contact type strong magnetic impactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810715634.3A CN108678656B (en) | 2018-07-03 | 2018-07-03 | Non-contact type strong magnetic impactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678656A CN108678656A (en) | 2018-10-19 |
| CN108678656B true CN108678656B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810715634.3A Active CN108678656B (en) | 2018-07-03 | 2018-07-03 | Non-contact type strong magnetic impactor |
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| Country | Link |
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| CN (1) | CN108678656B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252650B (en) * | 2018-01-31 | 2023-09-08 | 中石化石油工程技术服务有限公司 | Downhole magnetic force-based rotary impact tool and method |
| CN111927366B (en) * | 2020-09-14 | 2022-03-18 | 西南石油大学 | Neodymium magnet type hydraulic oscillator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8860417B2 (en) * | 2012-01-17 | 2014-10-14 | Baker Hughes Incorporated | Downhole activation system using magnets and method thereof |
| CN105927144B (en) * | 2016-04-21 | 2018-03-23 | 西南石油大学 | Underground speed-raising instrument with axial impact function |
| CN105971492B (en) * | 2016-06-08 | 2018-04-24 | 西南石油大学 | A kind of magnetic base torsion impact drilling tool |
| AU2017204555B2 (en) * | 2016-07-08 | 2023-01-12 | Flexidrill Limited | Vibratory apparatus for drilling apparatus |
| CN208502646U (en) * | 2018-07-03 | 2019-02-15 | 长江大学 | A kind of contactless strong magnetic impactor |
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2018
- 2018-07-03 CN CN201810715634.3A patent/CN108678656B/en active Active
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| CN108678656A (en) | 2018-10-19 |
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