CN106917586A - A kind of Well screw hydroscillator - Google Patents
A kind of Well screw hydroscillator Download PDFInfo
- Publication number
- CN106917586A CN106917586A CN201710319903.XA CN201710319903A CN106917586A CN 106917586 A CN106917586 A CN 106917586A CN 201710319903 A CN201710319903 A CN 201710319903A CN 106917586 A CN106917586 A CN 106917586A
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- China
- Prior art keywords
- valve
- screw
- valve disc
- hydroscillator
- upper shell
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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
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
-
- 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
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
Abstract
The present invention relates to a kind of Well screw hydroscillator, belong to technical field of petroleum downhole equipment.The hydroscillator includes upper shell, lower house, top connection, lower contact, spline housing and by-passing valve, mutually it is threadedly coupled by by-passing valve between upper shell and lower house, the ends screw of lower house is provided with lower contact, and the termination of upper shell is provided with top connection by spline housing；Screw motor is equipped with by abutment sleeve and assembling sleeve in lower house, screw motor side is equipped with valve disc by valve disc base.The hydroscillator produces pressure pulse by the change of the area of passage between screw motor and valve disc, the friction condition between drill string and the borehole wall is changed, drill string elasticity send brill the instantaneous coefficient of sliding friction growth rate reduction, so as to reduce the moment of torsion between frictional resistance, reduction drill string and the borehole wall, avoid the generation of lock of tool drilling, with drilling efficiency is increased substantially, the advantage of drilling cost is reduced.
Description
Technical field
The present invention relates to a kind of Well screw hydroscillator, belong to technical field of petroleum downhole equipment.
Background technology
In recent years, deepening continuously with each elephant hunt technology, oil well casing programme complexity gradually increases, water long
The problems such as quantity of flat, High angle and multi-branched horizontal well etc. increases proposes new actual requirement to drilling engineering, makes waterpower
The development space and demand of the instruments such as oscillator are improved.Well horizontal section length and quick drill is realized with regard to how to improve the standard
The problems such as entering becomes Petroleum Industry correlative study focus of attention.Complicated casing programme, not only to drilling technology and method
Requirement higher is proposed, and larger hole angle significantly increases the frictional resistance between petroleum drilling roofbolt and the borehole wall, reduces
The transmission efficiency of the pressure of the drill, have impact on mechanical rate of penetration.Domestic and foreign scholars with regard to how to improve the standard the flat segment length of WIH and
The problems such as realizing fast drilling has carried out substantial amounts of research work.Mud motor such as hydroscillator etc. is due to raising
Rate of penetration, when increasing single footage per bit, being easy to oriented control well track and slip can be made to send brill drill string and the borehole wall it
Between static friction many advantages, such as be changed into sliding friction to reduce frictional resistance, make its development space and demand obtain greatly carrying
Rise, also obtained the highest attention of vast researcher.
The content of the invention
It is an object of the present invention to be directed to above-mentioned the deficiencies in the prior art, there is provided one kind can effectively reduce drill string and well
Frictional resistance between wall, the generation for avoiding lock of tool drilling, and then improve the Well screw hydroscillator of drilling efficiency.
The technical scheme is that：
A kind of Well screw hydroscillator, including upper shell, lower house, top connection, lower contact, spline housing and by-passing valve,
It is characterized in that：Mutually it is threadedly coupled by by-passing valve between upper shell and lower house, the ends screw of lower house is provided with down
Joint, the termination of upper shell is provided with top connection by spline housing；Spiral shell is equipped with by abutment sleeve and assembling sleeve in lower house
Bar motor, screw motor side is equipped with valve disc by valve disc base；Thrust bearing is housed on valve disc base, thrust bearing side
Valve seat is installed on valve disc base, alignment bearing is installed on the valve disc base of thrust bearing opposite side；By-passing valve side it is upper
Step Shaft is provided with housing；Piston is equipped with by step shaft end cap and back-up ring on Step Shaft, is filled on the Step Shaft of piston side
There is butterfly spring；Butterfly spring is connected with piston contact.
Eccentric setting has flowing hole on described valve disc, and outage is symmetrically arranged with the valve disc of flowing hole both sides.
Sliding block is provided with by chute on valve disc above described flowing hole.
Described screw motor includes motor stator and motor rotor, and motor stator is by stator rubber and stator overcoat structure
Into stator rubber is arranged in stator overcoat by crimp, and stator overcoat realizes axially position by sleeve；Motor stator
It is threadedly coupled with lower house.
Described motor rotor termination is connected with sliding block, and motor rotor is connected by sliding block with valve disc sliding contact.
Counter balance pocket is provided between described alignment bearing and assembling sleeve.
Equilibrium gap is provided between assembling sleeve and valve disc base and valve disc, equilibrium gap is connected with counter balance pocket.
Described Step Shaft is threadedly coupled with top connection.
Described spline housing one end is threadedly coupled with upper shell；The spline housing other end is bonded with top connection and connects.
Housing liquid flow hole is provided with described upper shell.
Described by-passing valve is made up of application valve body, valve element, spring and control valve seat；It is equipped with by control valve seat in valve body
Valve element；Spring is provided between control valve seat and valve element；Valve body liquid flow hole is provided with described application valve body, is set on valve element
There is valve element liquid flow hole.
Technical solution of the present invention advantage compared with prior art is：
Reciprocating motion of the Well screw hydroscillator by connecing sliding block under motor rotor becomes valve disc area of passage
Change and produce pressure pulse, so that the active force in disk spring changes and deforms, and transmit motion to and top connection
On the drill string of connection, the friction condition between drill string and the borehole wall is set to change, drill string elasticity send the instantaneous sliding friction system of brill
Several growth rate reductions, so as to reduce the frictional resistance between drill string and the borehole wall, and can be effectively prevented from the accidents such as bit freezing
Occur, with drilling efficiency is increased substantially, the characteristics of reduce drilling cost.In addition the sliding block on valve disc can substitute screw rod and turn
Friction between son and valve disc, such that it is able to effectively improve the life-span of screw motor.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 be Fig. 1 in A-A to cross section structure schematic diagram；
Fig. 3 is the structural representation of by-passing valve of the invention.
In figure：1st, upper shell, 2, lower house, 3, top connection, 4, lower contact, 5, spline housing, 6, by-passing valve, 7, control valve
Body, 8, valve element, 9, spring, 10, control valve seat, 11, valve body liquid flow hole, 12, valve element liquid flow hole, 13, abutment sleeve, 14, assembling
Sleeve, 15, motor stator, 16, motor rotor, 17, valve disc base, 18, valve disc, 19, flowing hole, 20, outage, 21, thrust
Bearing, 22, base fixed cover, 23, alignment bearing, 24, sliding block, 25, counter balance pocket, 26, Step Shaft, 27, step shaft end cap, 28,
Piston, 29, butterfly spring, 30, housing liquid flow hole, 31, screw.
Specific embodiment
The Well screw hydroscillator includes upper shell 1, lower house 2, top connection 3, lower contact 4, spline housing 5 and side
Port valve 6.Mutually it is threadedly coupled by by-passing valve 6 between upper shell 1 and lower house 2.By-passing valve 6 is by application valve body 7, valve element 8, bullet
Spring 9 and control valve seat 10 are constituted；Valve element 8 is equipped with by control valve seat 10 in valve body 7；Set between control valve seat 10 and valve element 8
There is spring 9.Valve body liquid flow hole 11 is provided with application valve body 7, valve element liquid flow hole 12 is provided with valve element 8.
The ends screw of lower house 2 is provided with lower contact 4, and the termination of upper shell 1 is provided with top connection 3 by spline housing 5；
The one end of spline housing 5 is threadedly coupled with upper shell 1；The other end of spline housing 5 is bonded with top connection 3 and connects.
Screw motor is equipped with by abutment sleeve 13 and assembling sleeve 14 in lower house 2, screw motor includes motor stator
15 and motor rotor 16（Single-head screw）, motor stator 16 is threadedly coupled with lower house 2.
Screw motor side is equipped with valve disc 18 by valve disc base 17.Pass through screw 31 between valve disc base 17 and valve disc 18
It is connected.Eccentric setting has flowing hole 19 on valve disc 18, and outage 20 is symmetrically arranged with the valve disc 18 of the both sides of flowing hole 19.
Sliding block 24 is provided with by chute on valve disc 18 above flowing hole.
One end termination of motor rotor 16 is connected with sliding block 24, and motor rotor 16 is by sliding block 24 and the sliding contact of valve disc 18
Connection.The purpose of sliding block 24 is for blocking flowing hole 19, to change the area of passage of valve disc 18 in the course of the work.Valve disc bottom
Thrust bearing 21 is housed on seat 17, base fixed cover 22, thrust bearing are installed on the valve disc base 17 of the side of thrust bearing 21
Alignment bearing 23 is installed on the valve disc base 17 of 21 opposite sides；Assembling sleeve 14 is solid by motor stator 15 and alignment bearing 23
It is fixed, it is achieved in axially position.Counter balance pocket 25 is provided between alignment bearing 23 and assembling sleeve 14；Assembling sleeve 14 and valve disc
Equilibrium gap is provided between base 17 and valve disc 18, equilibrium gap is connected with counter balance pocket 25 and the epicoele of valve disc 18, the purpose is to
Keep the pressure balance of the both sides of valve disc 18.Valve disc base 17 is realized being arranged on valve seat by the threaded connection with base fixed cover 22
The fixation of thrust bearing 21 and alignment bearing 23 on 22, clamping thrust bearing is threadedly coupled by lower contact 4 with lower house 2
21, so as to realize the axially position of motor rotor 16 and compress.Thrust bearing 21 simultaneously is used to bear valve disc 18 and motor rotor 16
Axial force and ensure its centering.It is axially fixed that the side of thrust bearing 21 is carried out by the shaft shoulder of alignment bearing 23 and valve disc base 17
Position.
Step Shaft 26 is provided with the upper shell 1 of the side of by-passing valve 6；Step Shaft 26 is threadedly coupled with top connection 3.Step Shaft
Piston 28 is equipped with by step shaft end cap 27 and back-up ring on 26, butterfly spring 29 is housed on the Step Shaft 26 of the side of piston 28；Butterfly
Shape spring 29 is connected with the contact of piston 28.
Housing liquid flow hole 30 is provided with the upper shell 1 of the Well screw hydroscillator, for butterfly will to be leaked into
Drilling fluid in the space of spring 29 is discharged to drill string annular space.
The Well screw hydroscillator is fixed on Step Shaft 26 due to piston 28 by step shaft end cap 27, and by
Step Shaft 26 is threadedly attached in top connection 3, and forms step cooperation with the interior step surface of spline housing 5；So as to coordinate work
Plug 28 can carry out axial restraint to the disk spring 29 being enclosed within Step Shaft 26, thus can prevent the things such as bit freezing when drill string is lifted
Therefore cause drill bit to drop the phenomenon in shaft bottom.
The hydroscillator is by top connection 3, spline housing 5, Step Shaft 26, upper shell 1, disk spring 29, piston 28, step
Shaft end cap 27 constitutes vibration pipe nipple.
By abutment sleeve 13, alignment bearing 23, motor stator 15, motor rotor 16, assembling sleeve 14, valve disc 18, valve disc
Base 17, thrust bearing 21, lower house 2, base adapter sleeve 22, lower contact 4 constitute power sub.The sliding block of the hydroscillator
24 lower surfaces and the upper surface directly contact of valve disc 18 and there is high frequency friction, be easily caused the end wear of sliding block 24.When sliding block 24
When end face does not wear and tear, sliding block 24 is moved back and forth in valve disc groove and does not produce circumferential moment of torsion, after 24 end wear of sliding block, motor
Rotor declines, and the end face of sliding block 24 will be caused to produce excessive friction with the chute side of valve disc 18 and produce circumferential moment of torsion, this
When, in the presence of the moment of torsion, the end wear of sliding block 24 will be caused to aggravate.
The hydroscillator on valve disc base 17 due to being mounted with thrust bearing 21 and alignment bearing 23, and valve disc base
17 are bolted with valve disc 18.Under the moment of torsion effect produced after the end wear of sliding block 24, valve disc 18 is with valve disc base
17 axial-rotations together, thus the cylinder of sliding block 24 can be worn and torn and eliminated, to ensure the performance of pulse and extend instrument
Working life.
When the hydroscillator works, its top is connected by top connection 3 with drilling rod, and bottom passes through lower contact 4 and drill string
And drill bit connection.In the course of work, the effect drive motor rotor 16 of drilling rod internal high pressure drilling fluid rotates, and makes motor rotor 16
Termination rotates and radially reciprocates, so as to the kinetic energy of cleaner for high-pressure drilling fluid to be converted into the mechanical energy of rotation at a high speed, due to horse
It is connected with sliding block 24 up to the termination of rotor 16, and motor rotor 16 is connected by sliding block 24 with the sliding contact of valve disc 18；Sliding block 24
Rotated with motor rotor 16 and radially reciprocatingly slided, during this, sliding block 24 interlocks with the flowing hole 19 on valve disc 18
Overlap, make drilling fluid by when circulation area generating period change, and then make the upstream flow stream pressure of valve disc 18 that week to occur
Phase property changes.
When between sliding block 24 and valve disc 18 area of passage become hour, the upstream pressure of valve disc 18 raise, when area of passage most
Hour, i.e., when sliding block 24 blocks the flowing hole 19 of valve disc 18 completely, now drilling fluid is flowed by the outage 20 of the both sides of valve disc 18
Cross, the upstream high liquid stream pulse of sliding block 24 reaches maximum.The flow stream pressure of maximum acts on piston 28 and Step Shaft
Make disk spring 29 compress and the high pressure kinetic energy of drilling fluid is changed into disc spring potential energy on 26 to be stored, the pressure of disk spring 29
Contracting motion transmits motion to drill bit by housing, so that bottomhole vibrates downwards.
When the area of passage change between sliding block 24 and valve disc 18 is big, the upstream pressure of sliding block 24 reduction, before this in compression
The disk spring 29 of state releases energy, and disk spring 29 extends and the housing by the hydroscillator transmits motion to brill
Head, makes drill bit move upwards.When area of passage is maximum, i.e., when there is no faying surface between the flowing hole 19 of sliding block 24 and valve disc 18
Product, the upstream high liquid stream pulse of sliding block 24 reaches minimum.Because screw motor can be provided under cleaner for high-pressure drilling fluid effect
The rotary motion of stabilization, and with certain cycle, under periodic pressure impulse action, the hydroscillator can produce edge
The periodical high-frequency of axial direction is wriggled, and the friction condition between drill string and the borehole wall is changed, drill string elasticity send the instantaneous cunning of brill
The growth rate reduction of the coefficient of kinetic friction, so as to reduce frictional resistance, improve rate of penetration.
The hydroscillator can be by controlling the size and then convenience of the both sides outage 20 of valve disc 18 and flowing hole 19
Control minimum pressure values, under identical pressure magnitude, minimum pressure values can be designed into it is very small, so as to reduce maximum pressure
Force value, which reduces instrument internal pressure and extends working life to the infringement of housing.
The by-passing valve 6 of the hydroscillator is when the drilling fluid of certain pressure is passed through, and valve element 8 is downward because pressure is acted on
It is mobile, so that the valve element liquid flow hole 12 closed in by-passing valve 6；When distress resolves, valve element 8 is moved upwards in the presence of spring 9
Dynamic, valve body liquid flow hole 11 is opened, drilling fluid discharge.When drill bit is taken out into shaft bottom, due to the closure of screw motor, in drill string
Drilling fluid annular space will be flowed into by valve body liquid flow hole 11 and be unlikely to be spilled over to well head from drill string upper end.
The assembling sleeve 14 of the hydroscillator and the gap of valve disc 18 can introduce drilling fluid, with lubricating thrust bearing 21
With alignment bearing 23, and the active area of the epicoele pulse of valve disc 18 can be reduced to reduce the load on thrust bearing 21 and right
The upside of alignment bearing 23 is lowered the temperature, and so as to extend the working life of thrust bearing 21, and then extends the hydroscillator
Service life.Meanwhile, drilling fluid can be by the way that the gap between base adapter sleeve 22 and lower contact 4 is to thrust bearing 21 and helps
Positive bearing 23 is lubricated and reduces thrust bearing 21 and temperature when alignment bearing 23 works, to improve thrust bearing 21 and help
The service life of positive bearing 23.
Claims (10)
1. a kind of Well screw hydroscillator, including upper shell（1）, lower house（2）, top connection（3）, lower contact（4）, flower
Key set（5）And by-passing valve（6）, it is characterised in that：Upper shell（1）And lower house（2）Between pass through by-passing valve（6）Mutual screw thread connects
Connect, lower house（2）Ends screw lower contact is installed（4）, upper shell（1）Termination pass through spline housing（5）It is provided with and connects
Head（3）；Lower house（2）It is interior by abutment sleeve（13）With assembling sleeve（13）Equipped with screw motor, screw motor side passes through
Valve disc base（17）Equipped with valve disc（18）；Valve disc base（17）It is upper that thrust bearing is housed（21）, thrust bearing（21）The valve of side
Try to get to the heart of a matter seat（17）On base adapter sleeve is installed（22）, thrust bearing（21）The valve disc base of opposite side（17）On righting is installed
Bearing（23）；By-passing valve（6）The upper shell of side（1）Inside it is provided with Step Shaft（26）；Step Shaft（26）It is upper to pass through step shaft end
Cap（27）Piston is housed with back-up ring（28）, piston（28）The Step Shaft of side（26）It is upper that butterfly spring is housed（29）；Butterfly spring
（29）With piston（28）Contact connection.
2. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described valve disc（18）On
Eccentric setting has flowing hole（19）, flowing hole（19）The valve disc of both sides（18）On be symmetrically arranged with outage（20）.
3. a kind of Well screw hydroscillator according to claim 2, it is characterised in that：Described flowing hole（19）
The valve disc of top（18）On sliding block is provided with by chute（24）.
4. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described screw motor bag
Include motor stator（15）And motor rotor（16）, motor stator（16）With lower house（2）Threaded connection.
5. a kind of Well screw hydroscillator according to claim 4, it is characterised in that：Described motor rotor
（15）Termination and sliding block（24）Connection, motor rotor（15）By sliding block（24）With valve disc（18）It is slidably connected.
6. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described alignment bearing
（23）With assembling sleeve（14）Between be provided with counter balance pocket（25）；Assembling sleeve（14）With valve disc base（17）And valve disc（18）It
Between be provided with equilibrium gap, equilibrium gap and counter balance pocket（25）Connection.
7. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described Step Shaft（26）
With top connection（3）Threaded connection.
8. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described spline housing（5）
One end and upper shell（1）Threaded connection；Spline housing（5）The other end and top connection（3）It is bonded and connects.
9. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described upper shell（1）
On be provided with housing liquid flow hole（30）.
10. a kind of Well screw hydroscillator according to claim 1, it is characterised in that：Described by-passing valve（6）
By application valve body（7）, valve element（8）, spring（9）And control valve seat（10）Constitute；Application valve body（7）It is interior by control valve seat（10）
Equipped with valve element（8）；Control valve seat（10）With valve element（8）Between be provided with spring（9）；Described application valve body（7）On be provided with
Valve body liquid flow hole（11）, valve element（8）On be provided with valve element liquid flow hole（12）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710319903.XA CN106917586B (en) | 2017-05-09 | 2017-05-09 | Screw type underground hydraulic oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710319903.XA CN106917586B (en) | 2017-05-09 | 2017-05-09 | Screw type underground hydraulic oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106917586A true CN106917586A (en) | 2017-07-04 |
| CN106917586B CN106917586B (en) | 2023-08-01 |
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ID=59568003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710319903.XA Active CN106917586B (en) | 2017-05-09 | 2017-05-09 | Screw type underground hydraulic oscillator |
Country Status (1)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107654193A (en) * | 2017-11-21 | 2018-02-02 | 长江大学 | A kind of hydraulic control double acting hydraulic oscillation drilling tool |
| CN111255378A (en) * | 2020-03-06 | 2020-06-09 | 江苏和信石油机械有限公司 | Hydraulic drag reduction oscillator for guiding oil-gas field drilling |
| CN113027341A (en) * | 2021-04-12 | 2021-06-25 | 苗芷芃 | Adjustable screw anti-drag tool for coiled tubing drilling and adjusting method |
| CN113187455A (en) * | 2021-05-28 | 2021-07-30 | 长江大学 | Pulse continuous jet flow hot melting combustible ice mining tool |
| CN113389492A (en) * | 2021-05-08 | 2021-09-14 | 德州联合石油科技股份有限公司 | Controllable hydraulic oscillator |
| CN113767208A (en) * | 2019-05-02 | 2021-12-07 | 瑞沃井下工具有限公司 | Wear resistant vibratory assembly and method |
| CN114458228A (en) * | 2021-09-13 | 2022-05-10 | 中海油能源发展股份有限公司 | Abandoned well shaft casing vibration plugging tool and plugging method thereof |
| CN114541996A (en) * | 2020-11-25 | 2022-05-27 | 中国石油天然气股份有限公司 | Axial sliding sleeve type underground hydraulic pulse excitation tool |
| CN116201482A (en) * | 2023-02-27 | 2023-06-02 | 湖北龙脉宜和石油科技有限公司 | Screw type underground hydraulic oscillator |
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