CN107939293B - Downhole pressure pulse generator - Google Patents
Downhole pressure pulse generator Download PDFInfo
- Publication number
- CN107939293B CN107939293B CN201711367833.1A CN201711367833A CN107939293B CN 107939293 B CN107939293 B CN 107939293B CN 201711367833 A CN201711367833 A CN 201711367833A CN 107939293 B CN107939293 B CN 107939293B
- Authority
- CN
- China
- Prior art keywords
- pressure pulse
- generating element
- pulse generating
- jet oscillator
- control channel
- 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.)
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Links
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 7
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 230000010355 oscillation Effects 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- 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 invention relates to a downhole pressure pulse generator, an outer tube is connected between an upper joint and a lower joint, a pressure pulse generating element is arranged between the upper joint and the lower joint in the outer tube, the upper end of the pressure pulse generating element is contacted with the upper joint and sealed by a sealing ring, and the lower end of the pressure pulse generating element is contacted with the lower joint and pressed; the pressure pulse generating element is formed by buckling a bottom plate and a cover plate and connecting the bottom plate and the cover plate through bolt fastening, and comprises a jet oscillator inlet with a nozzle structure, two jet oscillator control channels, two jet oscillator control channel, a signal channel, a flat wall surface, a concave wall surface, a vortex cavity and a vortex cavity outlet. The invention has simple and compact structure, the parts are a whole, no moving parts exist, and the adaptability to complex conditions is good; the system oscillation frequency and pressure drop can be changed by changing the nozzle width at the inlet of the jet oscillator and the signal path length; the hard material of hard alloy is adopted to manufacture the alloy with good erosion resistance.
Description
Technical Field
The invention relates to a downhole pressure pulse generating tool, in particular to a downhole pressure pulse tool for deep wells, ultra-deep wells, directional drilling in the fields of oil gas drilling, non-excavation drilling and the like.
Background
The pressure pulse generator not only can generate pressure pulse waves to act on the bottom of the hole so as to be beneficial to removing rock debris at the bottom of the hole, form instantaneous negative pressure at the bottom of the hole and improve the drilling speed, but also can act on the vibration telescopic nipple joint to form axial vibration so as to reduce friction between the drill string and the hole wall, reduce the problems of pressure bearing and sticking and improve the drilling efficiency.
The existing bottom hole pressure pulse generating tool generally has the problems of complex structure, poor adaptability to complex conditions, low service life and poor adjustability of vibration frequency and pulse pressure, and is not applied in a large scale.
Disclosure of Invention
The invention aims to provide the underground pressure pulse generator which is simple in structure, long in service life and convenient in pressure and frequency adjustment.
The invention aims at realizing the following technical scheme:
the underground pressure pulse generator is formed by connecting an upper joint with an outer tube through threads, connecting the outer tube with a lower joint through threads, and arranging a pressure pulse generating element between the upper joint and the lower joint in the outer tube; the upper end of the pressure pulse generating element is contacted with the upper joint and sealed by a sealing ring, and the lower end of the pressure pulse generating element is contacted with the lower joint and pressed; the pressure pulse generating element is buckled by a bottom plate and a cover plate and is connected through bolt fastening, the pressure pulse generating element comprises a jet oscillator inlet with a nozzle structure, the jet oscillator inlet is arranged at the top of the center of the pressure pulse generating element, a left jet oscillator control channel is arranged on the left side of the jet oscillator inlet, a right jet oscillator control channel is arranged on the right side of the jet oscillator inlet, a signal channel is arranged on the outer cambered surface of the bottom plate, the right jet oscillator control channel is communicated with the signal channel through a right control channel, the left jet oscillator control channel is communicated with the signal channel through a left control channel, a flat wall surface and a concave wall surface are arranged below the jet oscillator inlet, vortex cavities are arranged below the two wall surfaces, and vortex cavity outlets are arranged in the center of the arc profile of the vortex cavities.
Preferably, the fluid medium used by the pressure pulse generator is drilling mud, gas or foam.
Preferably, the joint surface between the bottom plate and the cover plate is finished to a surface roughness of 0.8 μm or less.
Preferably, the bottom plate and the cover plate are integrally manufactured by adopting tungsten-cobalt hard alloy materials.
Preferably, the signal channel is arranged on the outer cambered surface of the bottom plate, the length of the signal channel can be freely adjusted according to the requirement, and the structural form is not limited to the S-shaped structure in the figure.
The system oscillation frequency and pressure drop were varied by varying the nozzle width at the jet oscillator inlet and the signal path length.
Working principle: the fluid medium enters the inlet of the jet oscillator through the central channel of the upper joint, and is randomly deflected to one side of the wall surface after being accelerated by the nozzle, the fluid in the signal channel of the jet oscillator acts on the control channel to enable the jet to be unable to stabilize the wall surface and one side of the wall surface so as to form jet self-oscillation, when the fluid medium enters the vortex cavity in the direction close to the radial direction and enters the emptying channel from the outlet of the vortex cavity and then enters the central channel of the lower joint, the throttling effect of the vortex cavity is smaller, the fluid resistance is lower, the system pressure drop is lower, and when the fluid medium enters the vortex cavity in the direction close to the tangential direction and enters the central channel of the lower joint from the outlet of the vortex cavity, the throttling effect of the vortex cavity is larger, the fluid resistance is higher, and the system pressure drop is higher.
The invention has simple and compact structure, only one main part, no moving parts and good adaptability to complex conditions; the system oscillation frequency and pressure drop can be changed by changing the nozzle width at the inlet of the jet oscillator and the signal path length; the hard material of hard alloy is adopted to manufacture the alloy with good erosion resistance.
Drawings
FIG. 1 is a block diagram of a downhole pressure pulse generator;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a view showing the structure of the outer arc surface of the base plate.
The device comprises an upper connector, a 2 outer tube, a 3 jet flow oscillator, a 4 lower connector, a 5 bottom plate and a 6 cover plate.
I-upper joint central fluid passage; II, jet oscillator inlet; III, a jet oscillator right control channel; IV, a jet oscillator left control channel; v-flat wall surface; VI, concave wall surface; VII-vortex chamber; VIII-the center channel of the lower joint; IX-vortex chamber outlet; x is the extrados of the bottom plate; XI-drain; XII-signal tract; XIII-left control channel; and XIV-right control channel.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
In fig. 1, an upper joint 1 is connected with an outer tube 2 through threads, and an upper joint central channel I is arranged in the middle of the inside of the upper joint 1; the outer tube 2 is connected with the lower joint 4 through threads, and a lower joint central channel VIII is arranged in the lower joint 4; a pressure pulse generating element 3 is arranged between the upper joint 1 and the lower joint 4 inside the outer tube 2; the upper end of the pressure pulse generating element 3 is contacted with the upper joint 1 and sealed by a sealing ring, and the lower end of the pressure pulse generating element 3 is contacted with the lower joint 4 and pressed; the pressure pulse generating element 3 is in interference fit with the outer tube 2, the pressure pulse generating element 3 is buckled by a bottom plate 5 and a cover plate 6 and is fixedly connected through bolts, and the pressure pulse generating element 3 comprises a jet oscillator inlet II, a jet oscillator right control channel III, a right control channel XIV, a jet oscillator left control channel IV, a left control channel XII, a signal channel XII, a flat wall surface V, a concave wall surface VI, a vortex cavity VII and a vortex cavity outlet IX; the jet oscillator inlet II is communicated with the upper joint central channel I, the jet oscillator right control channel III is communicated with the signal channel XII through the right control channel XIV, and the jet oscillator left control channel IV is communicated with the signal channel XII through the left control channel XII; the signal channel XII is arranged on the bottom plate extrados X of the bottom plate 5; an evacuation channel XI is formed between the outer tube 2 and the cover plate 6, and a vortex cavity VII is communicated with the evacuation channel XI through a vortex cavity outlet IX; the evacuation line XI communicates with the lower joint central passage VIII.
Claims (5)
1. The pressure pulse generator in pit, its characterized in that: the upper joint is connected with the outer tube through threads, the other end of the outer tube is connected with the lower joint through threads, a pressure pulse generating element is arranged between the upper joint and the lower joint in the outer tube, the upper end of the pressure pulse generating element is contacted with the upper joint and sealed by a sealing ring, and the lower end of the pressure pulse generating element is contacted with the lower joint and pressed tightly; the pressure pulse generating element is buckled by a bottom plate and a cover plate and is connected through bolt fastening, the pressure pulse generating element comprises a jet oscillator inlet of a nozzle structure, the jet oscillator inlet is positioned at the top of the center of the pressure pulse generating element, a jet oscillator left control channel is arranged on the left side of the jet oscillator inlet, a jet oscillator right control channel is arranged on the right side of the jet oscillator inlet, a signal channel is arranged on the outer cambered surface of the bottom plate, the jet oscillator right control channel is communicated with the signal channel through a right control channel, the jet oscillator left control channel is communicated with the signal channel through a left control channel, a flat wall surface and a concave wall surface are arranged below the jet oscillator inlet, vortex cavities are arranged below the two wall surfaces, and vortex cavity outlets are arranged in the center of the arc profile of the vortex cavities.
2. The downhole pressure pulse generator of claim 1, wherein: the fluid medium used for the pressure pulse generating element is drilling mud, gas or foam.
3. The downhole pressure pulse generator of claim 1, wherein: the surface roughness of the joint surface between the bottom plate and the cover plate is less than 0.8 mu m.
4. The downhole pressure pulse generator of claim 1, wherein: the bottom plate and the cover plate are integrally made of tungsten-cobalt hard alloy materials.
5. The downhole pressure pulse generator of claim 1, wherein: the length of the signal channel can be freely adjusted, and the structure form is S-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367833.1A CN107939293B (en) | 2017-12-19 | 2017-12-19 | Downhole pressure pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367833.1A CN107939293B (en) | 2017-12-19 | 2017-12-19 | Downhole pressure pulse generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107939293A CN107939293A (en) | 2018-04-20 |
| CN107939293B true CN107939293B (en) | 2024-04-05 |
Family
ID=61940691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711367833.1A Active CN107939293B (en) | 2017-12-19 | 2017-12-19 | Downhole pressure pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107939293B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1201763A (en) * | 1966-08-18 | 1970-08-12 | Lucas Industries Ltd | Fluid oscillators |
| US4134100A (en) * | 1977-11-30 | 1979-01-09 | The United States Of America As Represented By The Secretary Of The Army | Fluidic mud pulse data transmission apparatus |
| GB2002051A (en) * | 1977-08-05 | 1979-02-14 | Petroles Cie Francaise | Tool equipped with a percussive device |
| GB8719782D0 (en) * | 1987-08-21 | 1987-09-30 | Shell Int Research | Pressure variations in drilling fluids |
| CA2069953A1 (en) * | 1989-12-01 | 1991-06-02 | Alain Besson | Drilling tool with irrigation system using a fluid distributed by a fluidic oscillator |
| US5165438A (en) * | 1992-05-26 | 1992-11-24 | Facteau David M | Fluidic oscillator |
| CN200989164Y (en) * | 2006-10-09 | 2007-12-12 | 西南石油大学 | Pulsation pumping pressure drilling device for lowering underwell differential pressure |
| CA2774698A1 (en) * | 2011-09-29 | 2013-03-29 | Coil Solutions, Inc. | Propulsion generator and method |
| CN103774983A (en) * | 2013-12-25 | 2014-05-07 | 中国石油大学(华东) | Jet type torsional impact drilling tool |
| RU2013159257A (en) * | 2013-12-30 | 2015-07-10 | Федеральное государственное бюджетное учреждение науки Казанский научный центр Российской академии наук | DEVICE FOR COMBINED IMPACT ON PRODUCTIVE LAYER AND BOTTOM ZONE |
| CN104963624A (en) * | 2015-07-17 | 2015-10-07 | 东北石油大学 | Flow distributing type hydraulic oscillation circumferential impactor |
| US9316065B1 (en) * | 2015-08-11 | 2016-04-19 | Thru Tubing Solutions, Inc. | Vortex controlled variable flow resistance device and related tools and methods |
| CN106368609A (en) * | 2016-11-09 | 2017-02-01 | 西南石油大学 | Jet flow oscillating tool |
| CN206668157U (en) * | 2017-03-25 | 2017-11-24 | 四机赛瓦石油钻采设备有限公司 | A kind of auto-excitation type hydroscillator |
| CN207660545U (en) * | 2017-12-19 | 2018-07-27 | 中南大学 | Down-hole pressure impulse generator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8453745B2 (en) * | 2011-05-18 | 2013-06-04 | Thru Tubing Solutions, Inc. | Vortex controlled variable flow resistance device and related tools and methods |
| US9212522B2 (en) * | 2011-05-18 | 2015-12-15 | Thru Tubing Solutions, Inc. | Vortex controlled variable flow resistance device and related tools and methods |
-
2017
- 2017-12-19 CN CN201711367833.1A patent/CN107939293B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1201763A (en) * | 1966-08-18 | 1970-08-12 | Lucas Industries Ltd | Fluid oscillators |
| GB2002051A (en) * | 1977-08-05 | 1979-02-14 | Petroles Cie Francaise | Tool equipped with a percussive device |
| US4134100A (en) * | 1977-11-30 | 1979-01-09 | The United States Of America As Represented By The Secretary Of The Army | Fluidic mud pulse data transmission apparatus |
| GB8719782D0 (en) * | 1987-08-21 | 1987-09-30 | Shell Int Research | Pressure variations in drilling fluids |
| CA2069953A1 (en) * | 1989-12-01 | 1991-06-02 | Alain Besson | Drilling tool with irrigation system using a fluid distributed by a fluidic oscillator |
| US5165438A (en) * | 1992-05-26 | 1992-11-24 | Facteau David M | Fluidic oscillator |
| CN200989164Y (en) * | 2006-10-09 | 2007-12-12 | 西南石油大学 | Pulsation pumping pressure drilling device for lowering underwell differential pressure |
| CA2774698A1 (en) * | 2011-09-29 | 2013-03-29 | Coil Solutions, Inc. | Propulsion generator and method |
| CN103774983A (en) * | 2013-12-25 | 2014-05-07 | 中国石油大学(华东) | Jet type torsional impact drilling tool |
| RU2013159257A (en) * | 2013-12-30 | 2015-07-10 | Федеральное государственное бюджетное учреждение науки Казанский научный центр Российской академии наук | DEVICE FOR COMBINED IMPACT ON PRODUCTIVE LAYER AND BOTTOM ZONE |
| CN104963624A (en) * | 2015-07-17 | 2015-10-07 | 东北石油大学 | Flow distributing type hydraulic oscillation circumferential impactor |
| US9316065B1 (en) * | 2015-08-11 | 2016-04-19 | Thru Tubing Solutions, Inc. | Vortex controlled variable flow resistance device and related tools and methods |
| CN106368609A (en) * | 2016-11-09 | 2017-02-01 | 西南石油大学 | Jet flow oscillating tool |
| CN206668157U (en) * | 2017-03-25 | 2017-11-24 | 四机赛瓦石油钻采设备有限公司 | A kind of auto-excitation type hydroscillator |
| CN207660545U (en) * | 2017-12-19 | 2018-07-27 | 中南大学 | Down-hole pressure impulse generator |
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| 射流元件损坏机理试验研究及分析;熊青山, 彭振斌, 殷琨, 刘静;水文地质工程地质;20040920(第05期);全文 * |
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| Publication number | Publication date |
|---|---|
| CN107939293A (en) | 2018-04-20 |
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