CN106639944B - A kind of turbine type downhole hydraulic oscillator - Google Patents

A kind of turbine type downhole hydraulic oscillator Download PDF

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Publication number
CN106639944B
CN106639944B CN201611008296.7A CN201611008296A CN106639944B CN 106639944 B CN106639944 B CN 106639944B CN 201611008296 A CN201611008296 A CN 201611008296A CN 106639944 B CN106639944 B CN 106639944B
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China
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valve disc
shaft
pressure
housing
turbine wheel
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CN201611008296.7A
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CN106639944A (en
Inventor
冯进
魏俊
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Yangtze University
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Yangtze University
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B28/00Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/24Drilling using vibrating or oscillating means, e.g. out-of-balance masses

Abstract

The present invention relates to a kind of turbine type downhole hydraulic oscillators, belong to technical field of petroleum downhole equipment.Including upper housing, lower case, top connection, lower contact, spline housing and transition joint, it is mutually threadedly coupled between upper housing and lower case by transition joint, the ends screw of lower case is equipped with lower contact, and the end of upper housing is equipped with top connection by spline external threading;Turbine wheel shaft is equipped with by turbine wheel shaft end cap and thrust bearing in lower case.The hydroscillator uses turbine drives, without oscillation crosswise caused by eccentric motion, does not have an impact to the signal acquisition work of the tools such as LWD, MWD;It is wriggled by itself axial periodical high-frequency, so that the friction condition between drill string and the borehole wall is changed, drill string elasticity send the growth rate of the instantaneous coefficient of sliding friction of brill to reduce, to reduce frictional resistance, improve rate of penetration.

Description

A kind of turbine type downhole hydraulic oscillator
Technical field
The present invention relates to a kind of turbine type downhole hydraulic oscillators, belong to technical field of petroleum downhole equipment.
Background technique
In recent years, deepening continuously with each elephant hunt technology, oil well casing programme complexity gradually increase, long water 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 tools such as oscillator are improved.With regard to well horizontal section length and the realization quick drill of how improving the standard Into the problems such as become Petroleum Industry correlative study focus of attention.Complicated casing programme, not only to drilling technology and method Higher requirement is proposed, and biggish hole angle significantly increases the frictional resistance between petroleum drilling roofbolt and the borehole wall, reduced The transmission efficiency of bit pressure, affects mechanical rate of penetration.
Summary of the invention
It is an object of the present invention in view of the above shortcomings of the prior art, provide it is a kind of by turbine drives, and high temperature resistant, Wear resistance is strong, to improve the turbine type downhole hydraulic oscillator of load transfer effect.
The technical scheme is that
A kind of turbine type downhole hydraulic oscillator, including upper housing, lower case, top connection, lower contact, spline housing and centre Connector, it is characterised in that: be mutually threadedly coupled between upper housing and lower case by transition joint, the ends screw peace of lower case Equipped with lower contact, the end of upper housing is equipped with top connection by spline external threading;Pass through turbine wheel shaft end cap in lower case and pushes away Power bearing is equipped with turbine wheel shaft, passes through alignment bearing A and alignment bearing B on turbine wheel shaft and turbine assembly is housed, thrust bearing one end Valve disc is equipped with by valve seat in lower case;Valve disc is threadedly coupled with turbine wheel shaft;Installation in the upper housing of turbine wheel shaft end cap side There is Step Shaft, passes through Step Shaft end cap on Step Shaft and piston is housed, butterfly spring, butterfly bullet are housed on the Step Shaft of piston side Spring is connect with piston contact.
The alignment bearing A is emitted by turbine shaft end to be screwed with turbine wheel shaft, and alignment bearing B passes through the turbine wheel shaft shaft shoulder It is fixed on turbine wheel shaft.
The valve seat is threadedly coupled with lower contact.
Two corresponding flowing holes are respectively equipped on the valve disc and valve seat, between valve disc and the overcurrent hole end surface of valve seat It is provided with gap.
The spline housing is threadedly coupled with Step Shaft.
The Step Shaft is threadedly coupled with top connection.
The upper housing is threadedly coupled with spline housing.
The upper housing is equipped with drainage hole.
The beneficial effect of technical solution of the present invention compared with prior art is:
The main structure of the hydroscillator is made of pure metal part, without rubber bushing etc. to high temperature than more sensitive Component can also have preferable working performance in deep-well and ultradeep well;Using turbine drives, without cross caused by eccentric motion To vibration, the signal acquisition work of the tools such as LWD, MWD is not had an impact;It is wriggled by itself axial periodical high-frequency, The friction condition between drill string and the borehole wall is set to change, drill string elasticity send the growth rate of the instantaneous coefficient of sliding friction of brill to drop It is low, to reduce frictional resistance, improve rate of penetration;Bearing load is small, long service life.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the cross section structure schematic diagram of valve disc of the invention;
Fig. 3 is the cross section structure schematic diagram of valve seat of the invention;
Fig. 4 is enlarged structure schematic diagram at the A in Fig. 1;
Fig. 5 is enlarged structure schematic diagram at the B in Fig. 1.
In figure: 1, upper housing, 2, lower case, 3, top connection, 4, lower contact, 5, spline housing, 6, transition joint, 7, turbine wheel shaft End cap, 8, thrust bearing, 9, turbine wheel shaft, 10, alignment bearing A, 11, alignment bearing B, 12, stator, 13, rotor, 14, valve seat, 15, valve disc, 16, flowing hole, 17, Step Shaft, 18, Step Shaft end cap, 19, piston, 20, butterfly spring, 21, drainage hole.
Specific embodiment
The turbine type downhole hydraulic oscillator include upper housing 1, lower case 2, top connection 3, lower contact 4, spline housing 5 and in Between connector 6.It is mutually threadedly coupled between upper housing 1 and lower case 2 by transition joint 6, the ends screw of lower case 2 is equipped with The end of lower contact 4, upper housing 1 is equipped with top connection 3 by 5 screw thread of spline housing;Screw thread connects between upper housing 1 and spline housing 5 It connects.
Turbine wheel shaft 9 is equipped with by turbine wheel shaft end cap 7 and thrust bearing 8 in lower case 2, passes through alignment bearing on turbine wheel shaft 9 A10 and alignment bearing B11 is equipped with turbine assembly.Turbine assembly is by the turbine stator 12 and rotor that are sequentially arranged on turbine wheel shaft 9 13 are constituted.Alignment bearing A10 emits 7 by turbine shaft end and is screwed with turbine wheel shaft 9, and alignment bearing B11 passes through the axis of turbine wheel shaft 9 Shoulder is fixed on turbine wheel shaft 9, is achieved in axially position and is compressed stator 12 and rotor 13.
Valve disc 15 is equipped with by valve seat 14 in the lower case 2 of 8 one end of thrust bearing;Valve disc 15 and 9 screw thread of turbine wheel shaft connect It connects, and is rotated with turbine wheel shaft 9;Valve seat 14 is threadedly coupled with lower contact 4.Be respectively equipped on valve disc 15 and valve seat 14 two it is corresponding Gap is provided between the overcurrent hole end surface of flowing hole 16, valve disc 15 and valve seat 14.
The thrust bearing 8 of the hydroscillator be used to bear the axial force of turbine wheel shaft 9 and guarantee turbine wheel shaft 9 to neutrality, 8 side of thrust bearing carries out axially position by the shaft shoulder of turbine wheel shaft 9, and 8 other side of thrust bearing is positioned by valve disc 15.
Through-hole is offered at 15 central axis of valve disc, to reduce load for thrust bearing 8;The overcurrent of valve disc 15 and valve seat 14 Gap between 16 end face of hole, system generates the phenomenon that builds the pressure when the purpose is to prevent drilling fluid area of passage minimum.
Step Shaft 17 is installed in the upper housing 1 of 7 side of turbine wheel shaft end cap, Step Shaft 17 respectively with top connection 3 and spline Set 5 is threadedly coupled.Piston 19 is equipped with by Step Shaft end cap 18 on Step Shaft 17, butterfly is housed on the Step Shaft 17 of 19 side of piston Shape spring 20, butterfly spring 20 and piston 19 connect.Upper housing 1 is provided with drainage hole 21, for that will leak into disc spring sky Between drilling fluid be discharged to drill string annular space.
Since the Step Shaft 17 of the hydroscillator is threadedly attached in top connection 3, and the interior step with spline housing 5 Face forms step cooperation;Disc spring group so as to constitute to the multi-disc disk spring 20 covered on Step Shaft 17 passes through 19 He of piston The shaft shoulder end face of Step Shaft 17 carries out axial restraint, and can prevent the accidents such as bit freezing from drill bit being caused to fall shaft bottom when promoting drill string The phenomenon that.
The top connection 3 of the hydroscillator, spline housing 5, Step Shaft 17, upper housing 1, disk spring 20, piston 19, step Shaft end cap 7 constitutes vibration pipe nipple.
Turbine wheel shaft end cap 7, alignment bearing A10, stator 12, rotor 13, turbine wheel shaft 9, alignment bearing B11, thrust bearing 8, Lower case 2, lower contact 4 constitute power sub.
When the hydroscillator works, upper part is connect by top connection 3 with drilling rod, and lower part passes through lower contact 4 and drill string And drill bit connection.In the course of work, the rotor 13 of the effect driving turbine group of drilling rod internal high pressure drilling fluid rotates, and is formed around whirlpool The concentric rotational movement for taking turns central axis, to convert high-speed rotating mechanical energy for the kinetic energy of cleaner for high-pressure drilling fluid, and passes through Turbine wheel shaft 9 is transmitted to valve disc 15, is threadedly coupled due to valve disc 15 with turbine wheel shaft 9 and is rotate together at high speed with turbine wheel shaft 9, in valve disc When 15 high speed rotation, valve disc 15 is overlapping with the flowing hole 16 on valve seat 14, make drilling fluid by when circulating face Product generating period variation, and then change 15 upstream flow stream pressure generating period of valve disc, that is, produce pressure pulse.
During this, when the area of passage between valve disc 15 and valve seat 14 becomes smaller, 15 upstream pressure of valve disc is increased, when When area of passage minimum, i.e., when the flowing hole of valve disc 15 and valve seat 14 is located at central axis two sides, 15 upstream of valve disc is high Hydraulic fluid flowing pressure reaches maximum, and great flow stream pressure, which acts on piston 19 and Step Shaft 17, makes the compression of disk spring 20 simultaneously The high pressure kinetic energy of drilling fluid is changed into disc spring potential energy to store, the compression movement of disk spring 20 is passed movement by shell It is delivered to drill bit, so that bottomhole be made to vibrate downwards.
When the area of passage between valve disc 15 and valve seat 14 becomes larger, 15 upstream pressure of valve disc reduce, when area of passage most When big, i.e., when the flowing hole of valve disc 15 and valve seat 14 is located at central axis the same side, 15 upstream high liquid stream pressure of valve disc Power reaches minimum, and since bit pressure is greater than the minimum flow stream pressure, the disk spring 20 in compressive state discharges before this Energy, disk spring 20 extend and transmit motion to drill bit by the shell of the hydroscillator, move upwards drill bit.By It can provide stable rotary motion under cleaner for high-pressure drilling fluid effect in turbine group, and there is certain period, in periodic pressure Under impulse action, which is that can produce to wriggle along axial periodical high-frequency, makes the friction between drill string and the borehole wall Condition changes, drill string elasticity send the growth rate of the instantaneous coefficient of sliding friction of brill to reduce, to reduce frictional resistance, raising machine Tool drilling speed.
It is provided with pressure balance chamber on the valve disc 15 of the hydroscillator, by introducing low pressure in pressure equaliser Chamber can make flow stream pressure act on the end face of valve disc 15 and generate an active force axially upward, which can reduce The load of thrust bearing 8, to extend the working life of thrust bearing 8;And then extend the service life of the hydroscillator.

Claims (1)

1. a kind of turbine type downhole hydraulic oscillator, including upper housing (1), lower case (2), top connection (3), lower contact (4), flower Key set (5) and transition joint (6), it is characterised in that: pass through transition joint (6) mutual spiral shell between upper housing (1) and lower case (2) Line connection, the ends screw of lower case (2) are equipped with lower contact (4), and the end of upper housing (1) is pacified by spline housing (5) screw thread Equipped with top connection (3);The upper housing (1) is threadedly coupled with spline housing (5);Upper housing (1) is equipped with drainage hole (21);Under Turbine wheel shaft (9) are housed by turbine wheel shaft end cap (7) and thrust bearing (8) in shell (2), pass through alignment bearing A on turbine wheel shaft (9) (10) and alignment bearing B(11) turbine assembly, alignment bearing A(10 are housed) (7) and turbine wheel shaft (9) screw thread are emitted by turbine shaft end It is fixed, alignment bearing B(11) it is fixed on turbine wheel shaft (9) by the turbine wheel shaft shaft shoulder;The lower case (2) of thrust bearing (8) one end It is interior that valve disc (15) are equipped with by valve seat (14);Through-hole is offered at valve disc (15) central axis, for thrust bearing (8) reduction Load;Valve seat (14) is threadedly coupled with lower contact;Two corresponding flowing holes are respectively equipped on valve disc (15) and valve seat (14) (16), it is provided with gap between valve disc (15) and flowing hole (16) end face of valve seat (14), the purpose is to prevent drilling fluid overcurrent System generates the phenomenon that builds the pressure when area minimum;Valve disc (15) is threadedly coupled with turbine wheel shaft (9);Turbine wheel shaft end cap (7) side it is upper It is equipped with Step Shaft (17) in shell (1), spline housing (5) is threadedly coupled with Step Shaft (17);Step Shaft (17) and top connection (3) It is threadedly coupled;Piston (19) are housed by Step Shaft end cap (18) on Step Shaft (17), the Step Shaft (17) of piston (19) side Upper that disk spring (20) are housed, disk spring (20) and piston (19) connect and are provided with pressure on the valve disc (15) Counter balance pocket can make flow stream pressure act on end face and the generation of valve disc (15) by the way that low pressure is introduced pressure equaliser inner cavity One active force axially upward, the active force can reduce the load of thrust bearing (8), to extend the work of thrust bearing (8) Make the service life in service life He the hydroscillator;
When work, valve disc (15) is overlapping with the flowing hole (16) on valve seat (14), make drilling fluid by when stream Logical area generating period variation, and then change valve disc (15) upstream flow stream pressure generating period, produce pressure pulse; When the area of passage between valve disc (15) and valve seat (14) becomes smaller, valve disc (15) upstream pressure is increased, when valve disc (15) and valve When the flowing hole of seat (14) is located at central axis two sides, valve disc (15) upstream high flow stream pressure reaches maximum, liquid stream Pressure, which acts on piston (19) and Step Shaft (17), to be compressed disk spring (20) and is changed into the high pressure kinetic energy of drilling fluid Disc spring potential energy is stored, and the compression movement of disk spring (20) transmits motion to drill bit by shell, so that shaft bottom be made to bore Tool vibration downwards;
When the area of passage between valve disc (15) and valve seat 14 becomes larger, valve disc (15) upstream pressure reduce, when area of passage most When big, i.e., when the flowing hole of valve disc (15) and valve seat (14) is located at central axis the same side, valve disc (15) upstream high Flow stream pressure reaches minimum, and since bit pressure is greater than minimum flow stream pressure, disk spring (20) releases energy and by the water The shell of forced oscillation device transmits motion to drill bit, moves upwards drill bit;Since turbine group can under cleaner for high-pressure drilling fluid effect Stable rotary motion is provided, and there is certain period, under periodic pressure impulse action, which can be produced It is raw to wriggle along axial periodical high-frequency, so that the friction condition between drill string and the borehole wall is changed, drill string elasticity send wink of brill When the coefficient of sliding friction growth rate reduce, thus reduce frictional resistance, improve rate of penetration.
CN201611008296.7A 2016-11-16 2016-11-16 A kind of turbine type downhole hydraulic oscillator Active CN106639944B (en)

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Application Number Priority Date Filing Date Title
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Publication number Priority date Publication date Assignee Title
CN109469476B (en) * 2018-10-29 2022-04-19 中国石油集团渤海钻探工程有限公司 Throat type drilling fluid pulse generator for measurement while drilling instrument
CN109577896B (en) * 2018-11-06 2020-09-29 中国石油集团渤海钻探工程有限公司 Compensation type connector for drilling fluid pulse generator of intelligent drilling system
CN111255379A (en) * 2020-03-10 2020-06-09 中国石油大学(北京) Hydraulic pulse vibration impact device and drilling device thereof
CN111472707A (en) * 2020-04-03 2020-07-31 中国石油天然气股份有限公司 Vibration tool and method for improving drilling speed of drilling machine
CN112443273A (en) * 2020-11-06 2021-03-05 中国石油天然气股份有限公司大港油田分公司 Drilling speed-increasing device for realizing high-frequency pressurization of downhole drill bit by downhole turbine driving
CN113153154B (en) * 2021-01-13 2022-02-01 西南石油大学 Turbine type combined friction reducing tool capable of changing flowing state of drilling fluid

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