EP1231326A1 - Tête d'injection sous pression - Google Patents
Tête d'injection sous pression Download PDFInfo
- Publication number
- EP1231326A1 EP1231326A1 EP02290261A EP02290261A EP1231326A1 EP 1231326 A1 EP1231326 A1 EP 1231326A1 EP 02290261 A EP02290261 A EP 02290261A EP 02290261 A EP02290261 A EP 02290261A EP 1231326 A1 EP1231326 A1 EP 1231326A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection head
- conduit
- nozzle
- injection
- line
- 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.)
- Granted
Links
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Definitions
- the subject of the present invention is an injection head under pressure of a liquid to drill an excavation in the ground and in particular an injection head for implementing the technique known as Anglo-Saxon term of "jet grouting".
- jet grouting consists in disaggregating the ground using a very high kinetic energy liquid jet set up works in a borehole, the jet of liquid causing soil erosion in which one wants to carry out an excavation.
- a nozzle which is attached to the end of the drill rods, these rods allowing both the routing to the nozzle or the nozzles of the liquid under high pressure and progressive translation of the nozzle in the ground.
- the nozzle (s) are mounted on a member called the most often monitor or injection head which is attached to the lower end of the drill string, this monitor can itself be equipped at its end bottom of a mechanical drilling tool.
- the liquid used most often is a cement-based grout that will allow, after drilling, to make a cement floor element molded into the ground in square.
- the liquid which is carried by the rods is sent from the surface by a pump at pressures from one to several tens of MPa.
- the internal diameter of the rods conveying the liquid must be sufficient great for limiting pressure drops in the rods. This diameter can typically be of the order of 20 to 50 mm.
- the diameter of nozzle outlet should be small enough to print liquid a sufficient speed at its exit in order to erode the ground at a distance. Typically, the outlet diameter of the nozzle is included, the more often between 2 and 5 mm and the speed of the liquid leaving the nozzle is one to several hundred meters per second.
- the inner shape of the nozzle is optimized to keep the liquid jet as high a speed as possible as the jet moves away from the nozzle towards the ground so that it can erode the ground the most possible by using a minimum of kinetic energy.
- FIG. 1 there is shown the injection head described in this patent.
- the injection head 10 comprises a body 12 having a side wall 14 defining an internal cavity.
- a buzzard of pressurized liquid injection 16 is mounted in the external wall 14 of the monitor.
- This figure also shows elements 18 for connection to the drill string and elements 20 and 22 of connection to the liquid pressure line and to a line annular air circulating in the rods to simultaneously supply the liquid nozzle and an annular air nozzle 16.
- the nozzle 16 is supplied from the line 22 for conveying the liquid under pressure through a passage 24 provided in the body of the monitor 10 and by a tube 26 connecting the end of this passage to the inlet of the nozzle 16.
- the tubing 26 which has a constant section has a curvature regular in order to limit the disturbances of the liquid under pressure between the drill pipe and the nozzle 16 itself.
- the injection nozzle has a very small diameter compared to the diameter of the pipe used to convey the pressurized liquid to through the rods. The solution described in the mentioned US patent above is therefore not fully satisfactory.
- An object of the present invention is to provide a head especially for the implementation of the jet grouting which allows to improve more significantly the quality of the jet provided by the nozzle (s) the injection head mounted at the lower end of the drill string.
- the head for pressure injection of a soil erosion liquid mounted at the end of a train of rods or tubes, said train comprising supply means under liquid pressure
- said head comprising a body having an upper end for connection to the lower end of the drill string or of tubes and an external wall, body in which is mounted at least one injection nozzle whose inlet diameter is equal to d , and which has an axis x, x ', and means forming a conduit for connecting the supply of liquid to the inlet of said nozzle
- said injection head being characterized in that said means forming conduit have a medium line, the first end of which is connected to the lower end of the liquid supply pipe and the second end of which is connected tangentially to the axis x, x 'of the nozzle, said medium line being defined by at least one portion of the curve having a continuously varying radius of curvature, the cross section of said duct means decreasing regularly over at least half of its length from its first end to its second end.
- the quality and direction of the jet produced by the nozzle are significantly improved due to the gradual reduction and regular cross-section of the duct forming means, for example tubing, at least half its length from its end connection to the pressurized liquid supply line until it is connected to the inlet port of the injection nozzle.
- This characteristic combined with the fact that the mean line of means forming a conduit has a radius of curvature, which varies regularly, minimizes disruption of liquid flow in this tubing and therefore to obtain a jet whose energy is maximum and whose erosive power is kept at a maximum distance from the nozzle in the field.
- the axis of said supply line substantially coincides with the body axis of the injection head and the middle line of the conduit means comprises a first part of the curve extending between the first end and an intermediate point with a regular curvature, the concavity has a first sign and a second portion of the curve between said intermediate point and the second end having a regular curvature whose concavity has an opposite sign.
- the liquid line under pressure extends into said injection head and the first end of the conduit means is a side tap on said pipe substantially tangential to said pipe.
- the injection head 30 shown in Figure 2 has a body 32 consisting of a cylindrical side wall 34, one end lower 36 comprising means, for example a thread 38, of attachment of a mechanical drilling tool and an upper end 40.
- This upper end 40 comprises on the one hand a thread 42 of connection to the lower end of a drill pipe 44 and other share an internal sleeve 46 for connection to the pipe 48 formed in the drill pipe 44 for conveying the pressurized liquid which is most often, as we have already indicated, a grout.
- the annular space 50 between the rod borehole 44 and the pipe 48 is used to convey pressurized air. he goes of course, in some embodiments, we would not find this annular space.
- the side wall 34 of the injection head is provided with an injection nozzle 50 of axis x, x '.
- the axis x, x 'of the nozzle 50 is substantially perpendicular to the vertical axis z, z 'of the injection head but, in other embodiments, the axis could make an angulation with the horizontal, for example, between + 15 degrees and - 15 degrees.
- the nozzle can be in horizontal projection, perpendicular to the external wall of the monitor (nozzle 50 'in FIG. 4) or substantially tangential to this wall (nozzle 50 "in Figure 5) or its axis xx 'can occupy any orientation intermediate.
- a tube 54 used to connect the supply 46 in pressurized liquid at the inlet 50a of the nozzle 50.
- S1 is called the cross section of the pipe 46 for supplying pressurized liquid and s1 the straight section of the inlet of the nozzle 50.
- the pipe 54 of which call L the middle line has a first end 56 of connection to line 46 and a second end 58 of connection to the nozzle.
- the first end 56 of the tubing 54 has a straight section S'1 equal to section S1 and its second end has a straight section s'1 equal to the section s1 of the nozzle.
- the cross section of the tubing 54 that is to say the section of this tubing by planes orthogonal to the mean line L decreases regularly from the value S'1 to the value s'1.
- the tubing 54 may include portions of cylindrical tubing of very limited length.
- the cross section of the tubing can be circular but it can also have an oval shape, an ellipse shape, etc.
- the terminal sections 56 and 58 are generally circular, but they can also be elliptical.
- the middle line L of the tube 54 has a non-constant curvature but which varies regularly.
- the middle line L of the tube 54 comprises a first portion L 1 which goes from the end 56 to an intermediate point A and a second portion L 2 which goes from the intermediate point A to 'at the second end 58.
- the portion L 1 has a radius of curvature which keeps the same sign, the same applies to the portion L 2 but the sign of this last radius of curvature is the opposite of that of the portion L 1 .
- the portions L 1 and L 2 are tangentially connected but the mean line L has an inflection point at point A.
- This embodiment makes it possible in particular thanks to the portion L 2 of the mean line and therefore the corresponding portion of tubing to increase the length of the portion of the tubing having a large radius of curvature in its zone of connection to the nozzle.
- This arrangement makes it possible to stabilize even better the flow of the liquid under pressure in the tube 54 near the nozzle 50.
- tubing 54 could have other shapes as soon as when its middle line shows regular variations in curvature and that its cross section decreases significantly regularly from its first end 56 to its second end 58 of connection to the nozzle.
- Tubing may have only one radius of curvature and also might not have a midline arranged in a plane but be constituted by a form of propeller or spiral, that is, to be a three-dimensional curve.
- the tube 54 shown in FIG. 2 it is possible to increase the total length of the mean line L of this tube while maintaining the external dimensions of the useful part of the head. injection at reduced values corresponding to the diameter D 1 and the height H 1 .
- the increase in the length of the tube 54 makes it possible to improve the progressiveness of the reduction in cross section for straight sections given at the two ends of the tube.
- the diameter D 1 is less than 15 cm and the useful height of the injection head H 1 is less than 50 cm.
- FIG. 3 shows a second embodiment of a monitor according to the invention.
- This monitor essentially stands out by the fact that the line 48 for supplying pressurized liquid is extends into the monitor via a tool supply pipe 70 mechanical which can be fixed in the threaded sleeve 78. When it is mounted, the tool is supplied by line 70 via a controllable valve 72.
- the first end 56 'of the tube 54' is a lateral stitching on the pipe 70.
- this stitching is substantially tangential to the wall of the pipe 70.
- the middle line L 'of the tubing 54' is a three-curve dimensions.
- the tubing 54 is an element separate line, mounted in the body of the injection head.
- the body of the head injection was carried out by molding and that the tubing 54 was produced during of this molding using an appropriate technique.
- the body of the injection head would be a massive part in which the tube 54 would be formed by a recess.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Fuel-Injection Apparatus (AREA)
- Catching Or Destruction (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Nozzles (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims (9)
- Tête d'injection sous pression d'un liquide pour désagréger le terrain à partir d'un forage, ladite tête étant montée à l'extrémité d'un train de tiges ou de tubes, ledit train comportant des moyens d'alimentation sous pression en liquide, ladite tête comportant un corps (32) ayant une extrémité supérieure (40) de raccordement à l'extrémité inférieure du train de tiges ou de tubes et une paroi externe (34), corps dans lequel est montée au moins une buse d'injection (50) dont le diamètre d'entrée est égal à d, et qui présente un axe x,x', et des moyens formant conduit pour raccorder l'alimentation en liquide à l'entrée de ladite buse, ladite tête d'injection se caractérisant en ce que lesdits moyens formant conduit (54, 54') présentent une ligne moyenne dont la première extrémité (56) est raccordée à l'extrémité inférieure de la conduite d'alimentation en liquide (48) et dont la deuxième extrémité (58) est raccordée tangentiellement à l'axe x,x' de la buse (50), ladite ligne moyenne étant définie par au moins une portion de courbe présentant un rayon de courbure variant de façon continue, la section droite desdits moyens formant conduit diminuant de façon régulière sur au moins la moitié de sa longueur depuis sa première extrémité jusqu'à sa deuxième extrémité.
- Tête d'injection selon la revendication 1, caractérisée en ce que lesdits moyens d'alimentation en liquide comportent une conduite de liquide sous pression (48) prolongée dans ladite tête d'injection par une conduite (70) d'alimentation d'un outil et en ce que ladite première extrémité des moyens formant conduit (54') est un piquage latéral (56') sur ladite conduite (70) d'alimentation de l'outil, sensiblement tangentiel à ladite conduite.
- Tête d'injection sous pression selon la revendication 1, caractérisée en ce que la première extrémité (56) de la ligne moyenne desdits moyens formant conduit (54) est raccordée tangentiellement à l'axe de l'extrémité inférieure de la conduite (48) d'alimentation en liquide.
- Tête d'injection sous pression selon la revendication 1, caractérisée en ce que l'axe de ladite conduite d'alimentation en liquide (48) coïncide sensiblement avec l'axe du corps (32) de la tête d'injection et en ce que la ligne moyenne des moyens formant conduit (54) comprend une première partie de courbe (L1) s'étendant entre la première extrémité (56) et un point intermédiaire (A) et présentant une courbure régulière dont la concavité présente un premier signe et une deuxième portion de courbe (L2) s'étendant entre ledit point intermédiaire (A) et ladite deuxième extrémité (58) présentant une courbure régulière dont la concavité présente un signe opposé.
- Tête d'injection selon l'une quelconque des revendications 1 à 4, caractérisée en ce que lesdits moyens formant conduit (54, 54') ont une section droite sensiblement circulaire.
- Tête d'injection selon l'une quelconque des revendications 1 à 4, caractérisée en ce que lesdits moyens formant conduit (54, 54') ont une section droite de forme ovale.
- Tête d'injection selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comprend une pluralité de buses d'injection et une pluralité de moyens formant conduit, chacun étant raccordé à une buse d'injection.
- Tête d'injection selon l'une quelconque des revendications 1 à 7, caractérisée en ce que lesdits moyens formant conduit (54, 54') consistent en une tubulure distincte du corps (32) de la tête d'injection.
- Tête d'injection selon l'une quelconque des revendications 1 à 7, caractérisée en ce que le corps de la tête d'injection est réalisé par moulage et les moyens formant conduit sont réalisés lors du moulage.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0101856A FR2820780B1 (fr) | 2001-02-12 | 2001-02-12 | Tete d'injection sous pression d'un liquide pour forer une excavation dans le sol |
FR0101856 | 2001-02-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1231326A1 true EP1231326A1 (fr) | 2002-08-14 |
EP1231326B1 EP1231326B1 (fr) | 2004-04-21 |
Family
ID=8859884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02290261A Expired - Lifetime EP1231326B1 (fr) | 2001-02-12 | 2002-02-05 | Tête d'injection sous pression |
Country Status (9)
Country | Link |
---|---|
US (1) | US6648084B2 (fr) |
EP (1) | EP1231326B1 (fr) |
AT (1) | ATE264952T1 (fr) |
DE (1) | DE60200384T2 (fr) |
DK (1) | DK1231326T3 (fr) |
ES (1) | ES2220878T3 (fr) |
FR (1) | FR2820780B1 (fr) |
HK (1) | HK1049866B (fr) |
PT (1) | PT1231326E (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10236257A1 (de) * | 2002-08-09 | 2004-02-26 | Stump Spezialtiefbau Gmbh | Düsenstrahlvorrichtung |
EP1396585A1 (fr) * | 2002-08-13 | 2004-03-10 | Compagnie Du Sol | Tête d'injection sous pression d'un fluide pour désagréger le terrain à partir d'un forage |
EP2463443A1 (fr) * | 2010-12-13 | 2012-06-13 | Soilmec S.p.A. | Tête d'injection pour l'injection de mélanges de fluide pressurisés de consolidation dans le sol |
EP3489418A1 (fr) * | 2017-11-23 | 2019-05-29 | VSL International AG | Tête d'injection à haute efficacité pour injection de mélanges de fluides de consolidation sous pression dans le sol |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7040423B2 (en) | 2004-02-26 | 2006-05-09 | Smith International, Inc. | Nozzle bore for high flow rates |
US20060070740A1 (en) * | 2004-10-05 | 2006-04-06 | Surjaatmadja Jim B | System and method for fracturing a hydrocarbon producing formation |
ITPC20050020A1 (it) * | 2005-04-08 | 2006-10-09 | Cesare Melegari | Metodo e attrezzatura per la realizzazione di micropali nel terreno |
US7484575B2 (en) * | 2005-04-27 | 2009-02-03 | Frank's Casing Crew & Rental Tools, Inc. | Conductor pipe string deflector and method |
CA2631405A1 (fr) * | 2005-12-03 | 2007-06-07 | Frank's International, Inc. | Procede et appareil d'installation de tube conducteur de deviation |
US7694608B2 (en) * | 2005-12-20 | 2010-04-13 | Smith International, Inc. | Method of manufacturing a matrix body drill bit |
US8371369B2 (en) * | 2007-12-04 | 2013-02-12 | Baker Hughes Incorporated | Crossover sub with erosion resistant inserts |
IT1401219B1 (it) * | 2010-07-15 | 2013-07-12 | Trevi Spa | Testa di iniezione per iniettare miscele consolidanti fluide pressurizzate nel terreno. |
US9097104B2 (en) | 2011-11-09 | 2015-08-04 | Weatherford Technology Holdings, Llc | Erosion resistant flow nozzle for downhole tool |
WO2014032006A1 (fr) | 2012-08-23 | 2014-02-27 | Ramax, Llc | Foreuse à modes de fonctionnement commandés à distance et son système et son procédé de fabrication |
US10094172B2 (en) | 2012-08-23 | 2018-10-09 | Ramax, Llc | Drill with remotely controlled operating modes and system and method for providing the same |
AU2014201020B2 (en) | 2013-02-28 | 2016-05-19 | Weatherford Technology Holdings, Llc | Erosion ports for shunt tubes |
JP2017166135A (ja) * | 2016-03-14 | 2017-09-21 | 株式会社オーケーソイル | 地盤改良装置および地盤改良方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4624606A (en) * | 1985-03-12 | 1986-11-25 | N.I.T. Co., Ltd. | Foundation improvement process and apparatus thereof |
JPH10195862A (ja) * | 1997-01-09 | 1998-07-28 | Nitto Techno Group:Kk | 地盤改良装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6153912A (ja) * | 1984-08-24 | 1986-03-18 | Yuji Kaneko | 円柱状硬化壁の造成による地盤改良方法 |
US5228809A (en) | 1989-01-27 | 1993-07-20 | Kajima Corporation | Consolidating agent injecting apparatus and injecting apparatus for improving ground |
JP3614211B2 (ja) * | 1995-07-11 | 2005-01-26 | ケミカルグラウト株式会社 | 注入装置 |
-
2001
- 2001-02-12 FR FR0101856A patent/FR2820780B1/fr not_active Expired - Fee Related
-
2002
- 2002-02-05 DK DK02290261T patent/DK1231326T3/da active
- 2002-02-05 DE DE60200384T patent/DE60200384T2/de not_active Expired - Lifetime
- 2002-02-05 PT PT02290261T patent/PT1231326E/pt unknown
- 2002-02-05 ES ES02290261T patent/ES2220878T3/es not_active Expired - Lifetime
- 2002-02-05 AT AT02290261T patent/ATE264952T1/de not_active IP Right Cessation
- 2002-02-05 EP EP02290261A patent/EP1231326B1/fr not_active Expired - Lifetime
- 2002-02-07 US US10/071,480 patent/US6648084B2/en not_active Expired - Fee Related
-
2003
- 2003-01-15 HK HK03100363.6A patent/HK1049866B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4624606A (en) * | 1985-03-12 | 1986-11-25 | N.I.T. Co., Ltd. | Foundation improvement process and apparatus thereof |
JPH10195862A (ja) * | 1997-01-09 | 1998-07-28 | Nitto Techno Group:Kk | 地盤改良装置 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10236257A1 (de) * | 2002-08-09 | 2004-02-26 | Stump Spezialtiefbau Gmbh | Düsenstrahlvorrichtung |
WO2004020742A1 (fr) * | 2002-08-09 | 2004-03-11 | Stump Spezialtiefbau Gmbh | Systeme de projection par buse |
EP1396585A1 (fr) * | 2002-08-13 | 2004-03-10 | Compagnie Du Sol | Tête d'injection sous pression d'un fluide pour désagréger le terrain à partir d'un forage |
EP2463443A1 (fr) * | 2010-12-13 | 2012-06-13 | Soilmec S.p.A. | Tête d'injection pour l'injection de mélanges de fluide pressurisés de consolidation dans le sol |
ITTO20100988A1 (it) * | 2010-12-13 | 2012-06-14 | Soilmec Spa | Testa di iniezione per iniettare miscele consolidanti fluide pressurizzate nel terreno |
EP3489418A1 (fr) * | 2017-11-23 | 2019-05-29 | VSL International AG | Tête d'injection à haute efficacité pour injection de mélanges de fluides de consolidation sous pression dans le sol |
Also Published As
Publication number | Publication date |
---|---|
US6648084B2 (en) | 2003-11-18 |
FR2820780B1 (fr) | 2003-05-02 |
EP1231326B1 (fr) | 2004-04-21 |
HK1049866A1 (en) | 2003-05-30 |
ATE264952T1 (de) | 2004-05-15 |
FR2820780A1 (fr) | 2002-08-16 |
ES2220878T3 (es) | 2004-12-16 |
DE60200384D1 (de) | 2004-05-27 |
DE60200384T2 (de) | 2005-05-04 |
HK1049866B (zh) | 2004-09-10 |
DK1231326T3 (da) | 2004-08-16 |
US20020108752A1 (en) | 2002-08-15 |
PT1231326E (pt) | 2004-08-31 |
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