CN107420061A - Underbalance pulse oscillator - Google Patents

Underbalance pulse oscillator Download PDF

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Publication number
CN107420061A
CN107420061A CN201710912452.0A CN201710912452A CN107420061A CN 107420061 A CN107420061 A CN 107420061A CN 201710912452 A CN201710912452 A CN 201710912452A CN 107420061 A CN107420061 A CN 107420061A
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CN
China
Prior art keywords
impeller
valve core
bearings
core tube
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710912452.0A
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Chinese (zh)
Inventor
田家林
杨毅
杨琳
朱志
李居瑞
张堂佳
林晓月
周思奇
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Southwest Petroleum University
Original Assignee
Southwest Petroleum University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201710912452.0A priority Critical patent/CN107420061A/en
Publication of CN107420061A publication Critical patent/CN107420061A/en
Pending legal-status Critical Current

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Classifications

    • 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 invention discloses a kind of oscillator that drilling fluid can be promoted to take rock in the fields such as oil drilling.Its technical scheme is:Top connection, impeller housing, bear box, nozzle housing and lower contact pass sequentially through threaded connection;Positioning is realized by flat key and locking cap between impeller and impeller mandrel;Impeller mandrel, water cap and valve core tube pass sequentially through threaded connection, and moment of torsion caused by drilling fluid impact impeller passes to valve core tube by impeller mandrel and water cap, drives its rotation.Nozzle housing is provided with radial direction through hole, and valve core tube realizes tube fluid and extraneous connection and disconnection, the pressure oscillation of fluid in tubing string realized by tubing string inside and outside differential pressure, so as to produce drillstring vibrations when rotating.The present invention can effectively reduce the frictional resistance of horizontal well, extended reach well lower drilling tool and the borehole wall, can improve Improving Mud Carrying Capacity, while drilling efficiency is improved, can avoid the down-hole accidents such as viscous card.

Description

Underbalance pulse oscillator
Technical field
The invention belongs to a kind of Novel down-hole instrument of oil-gas drilling engineering field, particularly has and promotes chip removal work( The novel hydropower oscillator of energy.
Background technology
In recent years, with the continuous development of China's industry, oil, the demand of natural gas and yield are also increasing.So And in order to alleviate the shortage problem of China's oil resource, people start to enter to the severe field of the environmental conditions such as deep-well, ultradeep well Row oil exploitation.The exploitation of new oil gas well makes drilling engineering face more complicated situation, to meet stepout well condition or new oil Gas resource(Such as coal bed gas, shale gas, marine oil and gas)Needs, corresponding novel drilling method also continues to develop with instrument. In these new drilling techniques evolutions, it is the weight for needing to solve to improve rate of penetration, reduce wall friction, increase well target footpath Want underlying issue.In the method for solving these problems, the downhole tool mechanically to work realizes energy using drilling fluid Conversion, certain expected vibration is produced, was quickly grown in recent years.Compared with other method, downhole tool has energy conversion effect The characteristics of rate is high, good in economic efficiency, flexible and changeable, so as to obtain extensive concern and application.Related tool type includes spinning The specific implementations such as drilling tool, hydraulic impacting device have valve plate, screw rod, turbine, centrifuge blade etc., these new methods and new tool Occur that there is important application value to antifriction, speed-raising synergy.Existing hydroscillator can raise pump pressure, to mud The service life of pump can adversely affect, and axial force caused by screw rod can strengthen dynamic friction between valve plate and quiet valve plate Power, and then the abrasion of dynamic valve plate and quiet valve plate can be accelerated, this can greatly shorten the service life of hydroscillator.
Based on this, herein on existing Research foundation, a kind of new oscillator is proposed, realizes that energy turns using drilling fluid Change, produce the complex vibration based on axial vibration, due to the design feature of itself, axial force caused by impeller is not passed through Valve core tube passes to lower contact, the landwaste in drilling well liquid energy agitation bore hole annulus sprayed from bypass, to improve taking for drilling fluid Rock ability.And airframe structure parameter and drilling parameter are combined, realize drilling process antifriction, increase drill bit available weight, carry High rate of penetration and extension drill string enter the purpose of well location moves.
The content of the invention
It is an object of the invention to:To overcome existing level well, extended reach well to creep into, frictional resistance is big, and well head the pressure of the drill can not be effective Pass to that the deficiency of drill bit, the large rock-carrying ability of drilling fluid be not high and existing axial vibration instrument using effect is undesirable asks Topic, designs a kind of novel negative pressure pulse oscillator.
To achieve the above object, the technical solution adopted by the present invention is:Described underbalance pulse oscillator, by top connection, Locking cap, adjust pad A, impeller, flat key, impeller mandrel, impeller housing, water cap, valve core tube, adjust pad B, upper TC bearings move Circle, upper TC bearings moving-coil wear-resistant sleeve, type sealing ring, upper TC bearings Jing Quan, upper TC bearings it is quiet circle wear-resistant sleeve, woodruff key, string bearing, Bear box, lower TC bearings moving-coil, lower TC bearings moving-coil wear-resistant sleeve, lower TC bearings it is quiet circle wear-resistant sleeve, nozzle housing, nozzle, under Joint, plug composition, it is characterised in that top connection(1), impeller housing(7), bear box(18), nozzle housing(22)Connect with Head(24)Pass sequentially through threaded connection;Impeller(4)With impeller mandrel(6)Between pass through flat key(5)And locking cap(2)Connection, it is real Existing impeller(4)Positioning;Locking cap(2)Pass through screw thread and impeller mandrel(6)Connection;Impeller mandrel(6), water cap(8)And valve core tube (9)Pass sequentially through threaded connection;Upper TC bearings moving-coil(11)Pass through screw thread and valve core tube(9)Connection;Upper TC bearings Jing Quan(14) Pass through woodruff key(16)With bear box(18)Coordinate, realize that its is circumferentially positioned;String bearing(17)Positioned at upper TC bearings Jing Quan (14)With nozzle housing(22)Between, and pass through bear box(18)With nozzle housing(22)Between screw thread coordinate realize string axle Hold(17)Positioning;Lower TC bearing moving-coils(19)With valve core tube(9)Between using screw thread coordinate;Valve core tube(9)Lower end is provided with two Individual spaced 180 ° of radial direction through hole, is corresponded to therewith, nozzle housing(22)Lower end is also provided with radial direction through hole, and through hole is built with spray Mouth(23)And plug(25), nozzle(23)And plug(25)Pass through screw thread and nozzle housing(22)Connection;Nozzle housing(22)On End inner surface setting has the quiet circle wear-resistant sleeve of lower TC bearings(21), and pass through sintering and nozzle housing(22)Connect together;Nozzle Shell(22)The radial direction through hole of lower end is arranged in pairs, spaced 180 ° and in the same plane of each pair radial direction through hole.Nozzle Shell(22)The through hole of lower end could be arranged to 1 pair, 2 pairs, 3 pairs or 4 pairs, in accompanying drawing by taking 2 pairs of through holes as an example, the quantity of through hole Determined according to requirement of actual working condition;, then can be by which part nozzle when actual condition, which changes, needs to change vibration frequency (23)Change plug into(25), or by which part plug(25)Change nozzle into(23), the nozzle of replacing(23)Or plug(25) Must change in pairs.Valve core tube(9)In the radial direction through hole same plane of lower end, after instrument assembly is completed, valve core tube(9) The radial direction through hole of lower end two and nozzle housing(22)The radial direction through hole of lower end is in same plane.
Compared with the prior art, its advantage is the present invention:(1) less standpipe pressure can is only needed to produce Negative-going pulse;(2) conventional hydraulic oscillator can raise pump pressure, and underbalance pulse oscillator is provided with brand-new bypass, Ke Yi Pump pressure is reduced while improving drilling speed, reduces the consumption to pump;(3)Underbalance pulse oscillator can provide the week of a frequency-adjustable Phase property axial impact force;(4)The drilling fluid that underbalance pulse oscillator radially sprays has the ability that impact stirs to the borehole wall, helps In landwaste in the migration of annular space, raising Improving Mud Carrying Capacity.
Brief description of the drawings
Fig. 1 is the structural representation of underbalance pulse oscillator of the present invention.
In figure:1- top connections, 2- locking caps, 3- adjust pads A, 4- impeller, 5- flat keys, 6- impellers mandrel, 7- impeller housings The upper TC bearings moving-coil of body, 8- water caps, 9- valve core tubes, 10- adjust pads B, 11-, the upper TC bearings moving-coil wear-resistant sleeves of 12-, 13-O types The upper TC bearings of upper TC bearings Jing Quan, the 15- of sealing ring, 14- it is quiet circle wear-resistant sleeve, 16- woodruff keies, 17- string bearing, 18- bear boxes, The quiet circle wear-resistant sleeve of TC bearings, 22- nozzle housings, 23- sprays under TC bearing moving-coils wear-resistant sleeve, 21- under TC bearings moving-coil, 20- under 19- Mouth, 24- lower contacts.
Fig. 2 is the structural representation of underbalance pulse oscillator operation state 2 of the present invention.
Fig. 3 is that the drilling fluid of underbalance pulse oscillator operation state 1 of the present invention flows schematic three dimensional views.
Fig. 4 is that the drilling fluid of underbalance pulse oscillator operation state 2 of the present invention flows schematic three dimensional views.
Fig. 5 is the schematic three dimensional views of impeller of the present invention and its connection member.
Fig. 6 is the sectional view in A-A faces in Fig. 1 of the present invention.
In figure:The upper TC bearings moving-coil of 9- valve core tubes, 11-, the upper TC bearings moving-coil wear-resistant sleeves of 12-, the upper TC bearings Jing Quan of 14-, The quiet circle wear-resistant sleeve of the upper TC bearings of 15-, 16- woodruff keies, 18- bear boxes.
Fig. 7 is the sectional view in B-B faces in Fig. 1 of the present invention.
In figure:9- valve core tubes, 22- nozzle housings, 23- nozzles, 25- plugs.
Fig. 8 is the sectional view in C-C faces in Fig. 2 of the present invention.
In figure:9- valve core tubes, 22- nozzle housings, 23- nozzles, 25- plugs.
Fig. 9 is flat key type impeller schematic three dimensional views of the present invention.
Figure 10 is spline impeller schematic three dimensional views of the present invention.
Figure 11 is upper TC bearings moving-coil of the present invention and the schematic three dimensional views after upper TC bearings moving-coil wear-resistant sleeve sintering.
Figure 12 is upper TC bearings Jing Quan of the present invention and the schematic three dimensional views after the quiet circle wear-resistant sleeve sintering of upper TC bearings.
Figure 13 is underbalance pulse oscillator of the present invention and damper cooperation schematic diagram.
In figure:1301- dampers, 1302- underbalance pulse oscillators.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings:With reference to the accompanying drawings shown in 1, the underbalance pulse oscillator is main Will be by top connection, locking cap, adjust pad A, impeller, flat key, impeller mandrel, impeller housing, water cap, valve core tube, adjust pad B, the quiet circle wear-resistant sleeve of upper TC bearings moving-coil, upper TC bearings moving-coil wear-resistant sleeve, type sealing ring, upper TC bearings Jing Quan, upper TC bearings, half Round key, string bearing, bear box, lower TC bearings moving-coil, lower TC bearings moving-coil wear-resistant sleeve, the quiet circle wear-resistant sleeve of lower TC bearings, nozzle Shell, nozzle, lower contact, plug composition, it is characterised in that top connection 1, impeller housing 7, bear box 18, the and of nozzle housing 22 Lower contact 24 passes sequentially through threaded connection;Connected between impeller 4 and impeller mandrel 6 by flat key 5 and locking cap 2, realize impeller 4 Positioning;Locking cap 2 is connected by screw thread with impeller mandrel 6;Impeller mandrel 6, water cap 8 and valve core tube 9 pass sequentially through threaded connection; Upper TC bearings moving-coil 11 is connected by screw thread with valve core tube 9;The upper quiet circle 14 of TC bearings is matched somebody with somebody by woodruff key 16 and bear box 18 Close, realize that its is circumferentially positioned;String bearing 17 is located between the quiet circle 14 of upper TC bearings and nozzle housing 22, and passes through bear box 18 Screw thread between nozzle housing 22 coordinates the positioning for realizing string bearing 17;Used between lower TC bearings moving-coil 19 and valve core tube 9 Screw thread coordinates;The lower end of valve core tube 9 is provided with two spaced 180 ° of radial direction through hole, corresponds to therewith, the lower end of nozzle housing 22 Radial direction through hole is provided with, through hole is connected built with nozzle 23 and plug 25, nozzle 22 and plug 25 by screw thread with nozzle housing 22; The upper end inner surface setting of nozzle housing 22 has the quiet circle wear-resistant sleeve 21 of lower TC bearings, and is connected to one with nozzle housing 22 by sintering Rise;The radial direction through hole of the lower end of nozzle housing 22 is arranged in pairs, spaced 180 ° and in the same plane of each pair radial direction through hole. The through hole of the lower end of nozzle housing 22 could be arranged to 1 pair, 2 pairs, 3 pairs or 4 pairs, in accompanying drawing by taking 2 pairs of through holes as an example, the number of through hole Amount determines according to requirement of actual working condition;When actual condition, which changes, needs to change vibration frequency, then which part can be sprayed Mouth 23 changes plug 25 into, or changes which part plug 25 into nozzle 23, and the nozzle 23 or plug 25 of replacing must be paired Change.In the radial direction through hole same plane of the lower end of valve core tube 9, after instrument assembly is completed, valve core tube 9 lower end two radial direction is led to The radial direction through hole in hole and the lower end of nozzle housing 22 is in same plane.
The basic functional principle of underbalance pulse oscillator is:Drilling fluid with pressure potential is input to by ground drilling pump Down-hole string, after pressure drilling fluid is input to underbalance pulse oscillator, impeller 4 is impacted, impeller 5 rotates, by drilling fluid A part of pressure potential changes into mechanical energy, and mechanical energy drives valve core tube 9 to do periodic rotational movements, and valve core tube 9 controls instrument The connection and disconnection of internal drilling fluid and outside drilling fluid, due to the pressure differential of drilling fluid inside and outside instrument, rotated in valve core tube 9 During can make internal tool pressure produce cyclic fluctuation so that underbalance pulse oscillator produce a cycle vibration; And the drilling fluid flowed out can also be used to clean the borehole wall, improve the large rock-carrying ability of drilling fluid.
In the course of work, underbalance pulse oscillator top connects shock absorber and is used cooperatively, and as shown in figure 13, is flowed out from damper Drilling fluid directly from top connection 1 flow into underbalance pulse oscillator inside, the drilling fluid flowed through from top connection 1 directly impacts impeller 4, impeller 4 is produced rotary motion, and supervene certain axial force.As shown in figure 3, after drilling fluid impact impeller 4, enter Annular space between impeller housing 7 and water cap 8, then flowed into by the radial hole of water cap 8 inside water cap 8, along instrument toward flowing down, Into inside valve core tube 9;When the radial direction through hole of the lower end radial direction through hole of valve core tube 9 and nozzle housing 22 staggers, drilling fluid is direct Lower contact 24 is flowed into from the inside of valve core tube 9, then is flowed out from lower contact 24, into bottomhole assembly;When the lower end of valve core tube 9 radial direction When through hole connects with the radial direction through hole of nozzle housing 22, as shown in figure 4, a part of drilling fluid connects under being flowed into from the inside of valve core tube 9 First 24, then flowed out from lower contact 24, into bottomhole assembly, another part drilling fluid is then flowed through inside valve core tube 9, then from spray It is ejected at mouth 23 outside oscillator, due to the pressure differential of drilling fluid inside and outside oscillator, can reduces the pressure inside oscillator; Rotary motion caused by drilling fluid impact impeller 4 then passes to valve core tube 9 by impeller mandrel 6 and water cap 8, as shown in figure 5, making Valve core tube 9 rotates, and the lower end radial direction through hole of valve core tube 9 is being connected with the radial direction through hole of nozzle housing 22 and is not being connected it Between circulate so that drilling liquid pressure inside drill string produces a cycle fluctuation.Caused by drilling fluid impact impeller 4 downwards Axial force by impeller mandrel 6, water cap 8, valve core tube 9, upper TC bearings moving-coil 11 and string bearing 17 pass to nozzle housing 22, So that the lower end of valve core tube 9 is not subject to excessive axial force.

Claims (8)

1. underbalance pulse oscillator, by top connection, locking cap, adjust pad A, impeller, flat key, impeller mandrel, impeller housing, water Cap, valve core tube, adjust pad B, upper TC bearings moving-coil, upper TC bearings moving-coil wear-resistant sleeve, type sealing ring, upper TC bearings Jing Quan, on The quiet circle wear-resistant sleeve of TC bearings, woodruff key, string bearing, bear box, lower TC bearings moving-coil, lower TC bearings moving-coil wear-resistant sleeve, lower TC The quiet circle wear-resistant sleeve of bearing, nozzle housing, nozzle, lower contact, plug composition, it is characterised in that top connection(1), impeller housing(7)、 Bear box(18), nozzle housing(22)And lower contact(24)Pass sequentially through threaded connection;Impeller(4)With impeller mandrel(6)It Between pass through flat key(5)And locking cap(2)Connection, realizes impeller(4)Positioning;Locking cap(2)Pass through screw thread and impeller mandrel(6)Even Connect;Impeller mandrel(6), water cap(8)And valve core tube(9)Pass sequentially through threaded connection;Upper TC bearings moving-coil(11)By screw thread with Valve core tube(9)Connection;Upper TC bearings Jing Quan(14)Pass through woodruff key(16)With bear box(18)Coordinate, realize that it is circumferentially fixed Position;String bearing(17)Positioned at upper TC bearings Jing Quan(14)With nozzle housing(22)Between, and pass through bear box(18)With nozzle Shell(22)Between screw thread coordinate realize string bearing(17)Positioning;Lower TC bearing moving-coils(19)With valve core tube(9)Between adopt Coordinated with screw thread;Valve core tube(9)Lower end is provided with two spaced 180 ° of radial direction through hole, corresponds to therewith, nozzle housing(22) Lower end is also provided with radial direction through hole, and through hole is built with nozzle(23)And plug(25), nozzle(23)And plug(25)By screw thread with Nozzle housing(22)Connection.
2. the connected mode of impeller according to claim 1 and impeller mandrel, it is characterised in that:Described impeller(4)With Impeller mandrel(6)Connected mode include flat key connection, spline connection, semicircle key connection or radial direction lock-screw connection.
3. upper TC bearings moving-coil according to claim 1, upper TC bearings Jing Quan and lower TC bearing moving-coils, it is characterised in that: Described upper TC bearings moving-coil wear-resistant sleeve(12)With upper TC bearings moving-coil(11)Connected together by sintering;Upper TC bearings Jing Quan Wear-resistant sleeve(15)With upper TC bearings Jing Quan(14)Connected together by sintering;Lower TC bearings moving-coil wear-resistant sleeve(20)With lower TC axles Hold moving-coil(19)Connected together by sintering.
4. nozzle housing according to claim 1, it is characterised in that:Described nozzle housing(22)Upper end inner surface setting There is the quiet circle wear-resistant sleeve of lower TC bearings(21), and pass through sintering and nozzle housing(22)Connect together;Nozzle housing(22)Lower end Radial direction through hole be arranged in pairs, spaced 180 ° and in the same plane of each pair radial direction through hole.
5. the radial direction through hole of nozzle housing lower end according to claim 4, it is characterised in that:It is provided with described through hole Screw thread, is used for and nozzle(23)Or plug(25)Coordinate;Nozzle housing(22)The radial direction through hole quantity of lower end include 1 pair, 2 pairs, 3 Pair or 4 pairs, in accompanying drawing by taking 2 pairs of through holes as an example, the quantity of through hole determines according to requirement of actual working condition;By taking 4 pairs of through holes as an example, , then can be by which part nozzle when actual condition, which changes, needs to change vibration frequency(23)Change plug into(25), or will Which part plug(25)Change nozzle into(23), the nozzle of replacing(23)Or plug(25)Must change in pairs.
6. valve core tube according to claim 1, it is characterised in that:The valve core tube(9)The radial direction through hole of lower end is same In plane, after instrument assembly is completed, valve core tube(9)The radial direction through hole of lower end two and nozzle housing(22)The radial direction of lower end is led to Hole is in same plane.
7. underbalance pulse oscillator according to claim 1, it is characterised in that:Work as valve core tube(9)The radial direction through hole of lower end With nozzle(23)During connection, part drilling fluid is from valve core tube(9)Inside flows to tool exterior, tubing string inside drilling fluid pressure drop It is low;Work as valve core tube(9)During in closure state, valve core tube(9)Internal drilling fluid disconnects with tool exterior drilling fluid, while tubing string Internal drilling liquid pressure is begun to ramp up;So it is concatenated to form drilling fluid pressure oscillation inside tubing string.
8. underbalance pulse oscillator according to claim 1, it is characterised in that:Described valve core tube(9)Lower surface is with Joint(24)Keep certain gap.
CN201710912452.0A 2017-09-29 2017-09-29 Underbalance pulse oscillator Pending CN107420061A (en)

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CN201710912452.0A CN107420061A (en) 2017-09-29 2017-09-29 Underbalance pulse oscillator
PCT/CN2017/107549 WO2019061617A1 (en) 2017-09-29 2017-10-24 Negative pressure pulse oscillator

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CN108798520A (en) * 2018-05-29 2018-11-13 西南石油大学 A kind of underground drop, which is rubbed, subtracts the shimmy drilling tool of torsion
CN109441356A (en) * 2019-01-08 2019-03-08 西南石油大学 Hydroscillator based on cam and impeller
CN109538124A (en) * 2019-01-08 2019-03-29 西南石油大学 Ramp type impeller hydroscillator
CN109611028A (en) * 2019-01-08 2019-04-12 西南石油大学 Hydroscillator based on roller and impeller
CN109707313A (en) * 2019-01-08 2019-05-03 西南石油大学 Vane type multiple-pulse hydroscillator
CN112431568A (en) * 2020-11-24 2021-03-02 中国石油大学(北京) Bidirectional hydraulic oscillator

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Publication number Priority date Publication date Assignee Title
CN108798520A (en) * 2018-05-29 2018-11-13 西南石油大学 A kind of underground drop, which is rubbed, subtracts the shimmy drilling tool of torsion
CN108798520B (en) * 2018-05-29 2019-11-19 西南石油大学 A kind of underground drop, which is rubbed, subtracts the shimmy drilling tool of torsion
CN109441356A (en) * 2019-01-08 2019-03-08 西南石油大学 Hydroscillator based on cam and impeller
CN109538124A (en) * 2019-01-08 2019-03-29 西南石油大学 Ramp type impeller hydroscillator
CN109611028A (en) * 2019-01-08 2019-04-12 西南石油大学 Hydroscillator based on roller and impeller
CN109707313A (en) * 2019-01-08 2019-05-03 西南石油大学 Vane type multiple-pulse hydroscillator
CN109441356B (en) * 2019-01-08 2020-08-28 西南石油大学 Hydraulic oscillator based on cam and impeller
CN112431568A (en) * 2020-11-24 2021-03-02 中国石油大学(北京) Bidirectional hydraulic oscillator

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