EP0541942A1 - Tube de forage - Google Patents

Tube de forage Download PDF

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Publication number
EP0541942A1
EP0541942A1 EP92116603A EP92116603A EP0541942A1 EP 0541942 A1 EP0541942 A1 EP 0541942A1 EP 92116603 A EP92116603 A EP 92116603A EP 92116603 A EP92116603 A EP 92116603A EP 0541942 A1 EP0541942 A1 EP 0541942A1
Authority
EP
European Patent Office
Prior art keywords
drill
helix
cylinder
pipe according
drill pipe
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
Application number
EP92116603A
Other languages
German (de)
English (en)
Other versions
EP0541942B1 (fr
Inventor
Heinz Gruber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD-ANKER GmbH
Original Assignee
GD-ANKER GmbH
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 GD-ANKER GmbH filed Critical GD-ANKER GmbH
Publication of EP0541942A1 publication Critical patent/EP0541942A1/fr
Application granted granted Critical
Publication of EP0541942B1 publication Critical patent/EP0541942B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure

Definitions

  • the invention relates to a drill pipe according to the preamble of claim 1.
  • Drilling pipes which are used after the hole created as a lost tool simultaneously on the type of rock anchors are known in many forms. You must be suitable not only for creating a hole, but also for proper, especially centric leadership of the drill pipe and for introducing a mortar suspension or a comparable, hardenable medium.
  • the creation of the bore entails the guidance of a suitable flushing agent adapted to the nature of the surrounding rock or soil, which has to be removed during the drilling progress in the direction of the borehole mouth. Due to the centric guidance of the pipe in the grouted condition a possible all-round uniform coverage of the drill pipe to be achieved by the mortar suspension to safely protect the drill pipe from corrosive influences.
  • An introduction of the mortar suspension is usually effected via the drill pipe located in the borehole, wherein the mortar preferably exits in the region of the drill bit and fills the borehole in a rearward direction, ie in the direction of the borehole mouth.
  • An essential feature of the invention is accordingly a base body provided on the outside with a comparatively steep-going helix, which forms the drill pipe, wherein the outer radius of the helix may correspond to the radius of the borehole.
  • This coil fulfills a multiple function. On the one hand, due to its steepness, it ensures a comparatively short flow path for a dishwashing agent laden with soil particles, in cohesive form Soils usually air and also supports this funding process. At the same time, the wall of the wellbore is kept stable or smoothed over the entire length during the drilling progress. After the helix extends over the entire length of the drill pipe, the drill pipe is also subject over its entire length a reliable support on the walls of the borehole and thus a centric guide.
  • the radial width of this helix should be at least 10 mm, preferably at least 15 mm.
  • the drill pipe forming body can be formed integrally with the helix according to the features of claim 2 and consist of a cold-formed steel.
  • the basic body can thus in the simplest case be a drill pipe provided with a steep helix, smoothly formed in the surface area, the helix, in addition to the functions already described above, additionally also having the function of an anchoring means within the mortar.
  • claims 3 to 5 are directed to different embodiments of the helix.
  • This may - apart from the integral with the body training - also be designed as a separate component, which is suitably connected to the body, for example by welding. It is essential, however, that the helical surfaces - in a cross section of the Seen basic body - are always attached tangentially to the contour of the body, so that the serving for flow guidance surfaces of the body and helix are largely free of discontinuities. This ensures a perfect removal of the loaded with dissolved soil particles flushing medium and serves a reliable embedding in the introduced into the borehole mortar suspension.
  • the helix may in this case be formed as a hollow body, but also as a solid cross-section and in the former case, the front side open. This means that the interior of the coil is also available for transport operations and is also filled when introducing the mortar.
  • the features of claim 6 are directed to a particular design of the helix. This is hereafter as a radially outward direction cross-sectional tapered profile, thus be formed in the simplest case as a triangular profile, the two helical surfaces - seen in a cross section of the body - are tangentially attached to this.
  • claims 7 and 8 are directed to a further advantageous embodiment of the base body.
  • This is hereinafter referred to as a tubular, internally and externally provided with a thread-like deformation body, said thread is preferably also usable for Verschraubungs sectionen thread.
  • said thread is preferably also usable for Verschraubungs sectionen thread.
  • the features of claim 9 are directed to a particular embodiment of a coupling piece, which serves for screwing two drill pipes or body. It is essential that in the screwed state, the two drill pipes have on the outside always in particular in the connection area always uniform radial dimensions, so that no externally applied structures are provided in the connection region, such. in the case of a socket used to screw in drill pipe ends.
  • the prerequisite for this effect is that said second tube cylinder corresponds in its radial dimensions to the base body.
  • the latter tube cylinder can be secured in case of need also in its central position by selective welding.
  • the features of claim 11 are directed to a variant of the coupling piece insofar as said second tube cylinder in turn is also provided with a helix which corresponds in shape to the helixes of the base body and in the assembled state connects steadily to the latter.
  • the coil according to the invention starting from the borehole mouth to the borehole bottom - extending over the connecting region in each case two base bodies - is equipped with a continuous spiral.
  • the drill pipe according to the invention is provided according to the features of claims 12 and 13 with a detachable drill head, which may be bolted to the drill pipe. It is essential that the drill head is provided with a special support cylinder which extends over the length of said coupling body and defines an annular space which communicates via radially extending bores with the central longitudinal bore of the drill head. This means that while flushing the flushing medium on the one hand from the flushing holes of the drill bit exits, but at the same time on the said radial holes of the coupling body and the annulus occurs, flows in the rearward direction and develops a suction at the end of the coupling body, which supports the removal of the as a result of the drilling progress of dissolved material acts. At the same time a stabilizing and shaping effect is exerted on the surrounding borehole walls by the support cylinder.
  • the support cylinder has an outer diameter which corresponds at most to the outer diameter of the drill bit, but is preferably formed slightly smaller.
  • the support cylinder is connected to the drill bit in preferably non-detachable connection, thus can be welded to this be and is formed according to the features of claim 14 preferably smooth-walled. In addition, its position is stabilized by webs, which are in firm connection with the coupling body.
  • the coupling body is designed according to the features of claim 15 to the effect that the protruding from this threaded portion for screwing into the body of a drill pipe is determined.
  • the drilling and injection tube according to the invention is characterized in that the radial outer dimensions of the helix may be dimensioned slightly larger than those of the drill head, in particular the drill bit. Preferably, however, the dimensions of the helix correspond to those of the support cylinder.
  • a drill head 1 with a drill head is designated in its entirety in Fig. 1.
  • This is provided with an axially short, plate-like drill bit 2, which shows at least one, bore 4, whose axis intersects the longitudinal axis 3 of the drill head or which is arranged at least off-center.
  • This bore 4 fulfills the function of a flushing hole.
  • the drill bit 2 is otherwise provided in a manner known per se with cutting edges 5 or comparable means extending on the outside or borehole bottom side.
  • tube cylinder 6 with a tube cylinder which corresponds in its radial dimensions as well as in its wall thickness to be described below in the drill rods and in which a further tube cylinder 7 is inserted.
  • Both tube cylinders 6, 7 are made of cold-rolled steel and are provided with an inner and an outer thread, in such a way that the smaller-radius tubular cylinder 7 is screwed into the tube cylinder 6.
  • the tube cylinder 7 projects out of the tube cylinder 6 by a dimension 8 and serves, in a manner yet to be explained, for coupling a boring bar.
  • the drill bit 2 projects beyond the system of the tube cylinders 6, 7 in the radial direction and is denoted by 12 a smooth-walled metal cylinder, which is also welded to the drill bit 2 and whose radial dimension 13 substantially corresponds to that of the drill bit 2.
  • the cylinder 12 extends in the rest in the axial direction over a, the outer tube cylinder 6 corresponding length and communicates with this via webs 14 in connection, which are provided on the, the drill bit 2 facing away from the end portion of the tube cylinder 6. Between the outside of the tube cylinder 6 and the inside of the cylinder 12 thus remains an annular space 15 and it open the holes 11 mentioned in this annulus 15 a.
  • the cylinder 12 forms a support cylinder, which will be discussed in more detail below.
  • a flowing in the direction of arrow 16 detergent or a mortar suspension flows on the one hand on the bore 4 in the direction of arrow 17, but at the same time on the holes 11 and the annular space 15 in Direction of the arrows 18.
  • the drill rod 19 shown in Figs. 2 and 3 is formed as a tubular outer body provided with a continuous external and internal thread, which in turn consists of cold-rolled steel. It corresponds in its radial dimensions as well as in its wall thickness to the dimensions of the tube cylinder 6.
  • the internal thread of the boring bar 19, not shown in FIGS. 2 and 3 is intended to be screwed onto the section of the tube cylinder 7 protruding from the tube cylinder 6. so that in the assembled state of the drill rod, the front end of the tube cylinder 6 abuts directly on the facing end face of the drill rod 19.
  • a helix 20 is referred to, which is formed by a cross-section approximately triangular hollow profile.
  • the profile is characterized by two substantially identical legs 21, which extend symmetrically with respect to the axial plane 22 and substantially tangential to the cross-sectional contour of the drill rod and are welded thereto.
  • the helix has a comparatively large pitch of 1 m to 3 m and is smooth on the outside.
  • the helix 20 extends uniformly over the entire length of the drill rod and the front ends of the helix 20 are open and are available for a flow-through process.
  • the coil 20 may consist of a folded, material-identical with the drill rod 19 formed sheet metal.
  • the radius 23 of the coil 20 corresponds approximately to the radius of the drill bit 2 and thus the radius of a borehole.
  • the diameter of the coil may also be dimensioned larger than that of the drill head, up to a value of at most 1.05 times the diameter of the drill bit.
  • the outer radius of the drill rod 19 may for example be 15 mm to 20 mm.
  • Fig. 4 denotes a coupling piece in its entirety, which is designed symmetrically with respect to a radial plane 25. It consists of the coupling piece substantially of a first tube cylinder 26 which corresponds in terms of its radial dimensions including its internal and external thread the tube cylinder 7 of the drill head 1 and a second tube cylinder 27, which corresponds to the tube cylinder 6 in terms of its internal and external thread and the wall thickness ,
  • the tube cylinder 27 is screwed onto the tube cylinder 26 and fixed in a central position, for example by selective welding.
  • the ends of the inner tube cylinder 26 protrude symmetrically on both sides out of the tube cylinder 27.
  • the coupling piece 24 is screwed into the end of a drill rod, wherein then the extension drill rod is screwed onto the remaining tube cylinder section 26.
  • the drill rod In the assembled state, ie after screwing the drill head 1 with a drill rod, a coupling piece 24 and an extension drill rod, the drill rod thus over its entire length radially constant dimensions and there are no externally applying sleeve-like structures are provided in particular in the connecting region of two boring bars.
  • the drill rods are uniformly provided over their entire length with a continuous thread and it is in turn over the entire length a continuous, only in the connection area narrowed by the tube cylinder 26 hole available, which serves to guide a detergent or a mortar suspension.
  • a coupling piece of the type shown in FIG. 4 can serve not only for connecting an extension drill rod but also for connecting an adapter part for introducing a flushing medium or mortar suspension, and a drill drive.
  • an injection drilling anchor equipped in the above sense which is preferably designed for cohesive soils
  • this is firstly used in a manner known per se as a boring bar, wherein air flows through the central longitudinal bore 10 as a flushing agent.
  • the rinsing agent exits during drilling boring on the one hand on the bore 4 axially, in this case takes on, dissolved by the drill bit 2 soil particles to then flow around the drill bit 2 around and on the outside of the cylinder 12.
  • part of the scavenging air flows out via the bores 11 into the annular space 15 and, after leaving this annular space, develops a suction at the point 26, which assists the further conveyance in the direction of the borehole mouth.
  • the outside substantially the dimensions of Borehole wall corresponds to the latter exercised a stabilizing effect.
  • the coil 20 extends almost immediately to the end of the cylinder 12 facing the same and during the progress of the drilling develops a conveying action on the materials flowing between the inside of the borehole wall and the outside of the boring bars 19 in the direction of the borehole mouth.
  • the borehole walls are smoothed and evened by the helices and a further effect of the helices is a precise centric guidance of the drill rods within the borehole.
  • the cross section of the coils 20 also participates in the transport of dissolved soil materials.
  • the length of the tube cylinder 26 protruding from the tube cylinder 26 is ensured by appropriate length measurement that the frontal, open in cross-section ends of the coils 20 of two juxtaposed drill rods are exactly opposite.
  • the tube cylinder 27 may be equipped with a corresponding helical element, so that results in a continuous course of the helix 20 over the entire, composed of a plurality of drill rods length of Injekomsbohrankers due to the length measurement of said sections.
  • the longitudinal bore 10 is used in a conventional manner for introducing a mortar suspension, which continuously fills the borehole progressing in the area of the bottom of the borehole and progressing towards the borehole mouth.
  • the boring bars are due to the central guide by means of the helix provided on the outside with a uniform mortar coverage over the entire length of the borehole, which overlap due to the hollow helical cross-section is also present within the same. This means that over the entire length of the Injetechnischsbohrankers a uniform and reliable effective corrosion protection.
  • the radius 23 of the coil 20 is dimensioned to the effect that with centric guidance of the injection drill rod all-round minimum coverage with mortar or a similar medium, such as a synthetic resin in a layer thickness of at least 10 mm or 15 mm is given.
  • an anchor rod according to the invention has been described above in the context of a, from a drill head 1 and various, interconnected via coupling pieces drill rods injection anchor. Applications are not limited thereto. Thus, for example, there is also the possibility to use screwed between each two boring bars Verpreßventile, and that of the type as described in the unpublished patent application P 41 28 154.3 of the Applicant. Their essential feature are tubular cylinders of the type shown in Fig.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Surgical Instruments (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Piles And Underground Anchors (AREA)
EP92116603A 1991-11-09 1992-09-29 Tube de forage Expired - Lifetime EP0541942B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4136883A DE4136883C2 (de) 1991-11-09 1991-11-09 Bohrrohr
DE4136883 1991-11-09
SG160994A SG160994G (en) 1991-11-09 1994-11-07 Drill tube

Publications (2)

Publication Number Publication Date
EP0541942A1 true EP0541942A1 (fr) 1993-05-19
EP0541942B1 EP0541942B1 (fr) 1994-07-13

Family

ID=25908945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116603A Expired - Lifetime EP0541942B1 (fr) 1991-11-09 1992-09-29 Tube de forage

Country Status (8)

Country Link
US (1) US5388655A (fr)
EP (1) EP0541942B1 (fr)
JP (1) JPH05209489A (fr)
AT (1) ATE108509T1 (fr)
AU (1) AU654585B2 (fr)
CA (1) CA2081681A1 (fr)
DE (1) DE4136883C2 (fr)
SG (1) SG160994G (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19648868A1 (de) * 1996-11-26 1998-05-28 Hilti Ag Bohrwerkzeug mit hohlzylinderförmigem Trägerkörper
DE10035384C2 (de) * 2000-07-20 2002-10-10 Juergen Kretzschmar Verfahren zum Einbringen eines selbstbohrenden Injektionsankers in Böden, sowie Injektionsanker
GB0024909D0 (en) * 2000-10-11 2000-11-22 Springer Johann Drill string member
AT6969U3 (de) * 2004-02-20 2005-05-25 Techmo Entw & Vertriebs Gmbh Vorrichtung zum bohren von löchern in boden- oder gesteinsmaterial

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959368A (en) * 1932-10-05 1934-05-22 Kennedye Oil Field Devices Inc Means and method of centrally positioning alpha tube within an open well hole
US2504601A (en) * 1947-12-30 1950-04-18 Earl M Spry Auger drill
FR1083326A (fr) * 1953-09-14 1955-01-07 Perfectionnement apporté aux tubes destinés à être foncés dans le sol, et mode perfectionné de foncage et d'extraction de ces tubes
GB790483A (en) * 1954-01-02 1958-02-12 Wilhelm Weghuber Improvements in or relating to methods for connecting layers of rock by means of rock anchors in mining operations and means for carrying said methods into effect
DE2506611A1 (de) * 1975-02-17 1976-08-26 Drespa Geb Biebersdorf Ursula Drehbohrkopf fuer bohrungen mit hoher zielgenauigkeit
DE3234406A1 (de) * 1982-09-16 1984-03-22 Joy Manufacturing Co., 15222 Pittsburgh, Pa. Bohrstangenverbindung
EP0274719A2 (fr) * 1987-01-13 1988-07-20 Gd-Anker Gmbh Procédé de réalisation d'un filet et corps tubulaire muni d'un tel filet
EP0355379A2 (fr) * 1988-08-20 1990-02-28 Friedr. Ischebeck GmbH Boulon d'ancrage du type forage-injection
DE9004176U1 (de) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen Injektionsbohranker mit Transportschnecke
EP0448397A2 (fr) * 1990-03-23 1991-09-25 Conoco Inc. Procédé et dispositif pour forer un puits fortement dévié

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1659327A (en) * 1925-09-15 1928-02-14 Gustavus A Montgomery Drilling appliance
US1846177A (en) * 1928-07-16 1932-02-23 Calvin P Bascom Coal drill
US2088759A (en) * 1937-02-04 1937-08-03 Central Mine Equipment Co Mining drill
US2336029A (en) * 1942-02-27 1943-12-07 Texas Co Well drilling apparatus
US2831659A (en) * 1954-05-13 1958-04-22 Shell Dev Earth coring apparatus
US3085639A (en) * 1961-01-17 1963-04-16 Earl L Fitch Drill collar for oil wells
US3226855A (en) * 1963-03-27 1966-01-04 Opton F Smith Earth digging and trenching screw
US3301338A (en) * 1963-12-30 1967-01-31 Mobile Drilling Co Inc Hollow auger coupling
US3651876A (en) * 1970-06-19 1972-03-28 Mobile Drilling Co Inc Quick acting drive cap assembly
DE3400182A1 (de) * 1984-01-04 1985-07-11 Friedr. Ischebeck GmbH, 5828 Ennepetal Injektionsanker
DE4128154C2 (de) * 1991-07-02 1994-06-16 Gd Anker Gmbh & Co Kg Injektionsrohr und Verfahren zum Setzen eines Gebirgsankers

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959368A (en) * 1932-10-05 1934-05-22 Kennedye Oil Field Devices Inc Means and method of centrally positioning alpha tube within an open well hole
US2504601A (en) * 1947-12-30 1950-04-18 Earl M Spry Auger drill
FR1083326A (fr) * 1953-09-14 1955-01-07 Perfectionnement apporté aux tubes destinés à être foncés dans le sol, et mode perfectionné de foncage et d'extraction de ces tubes
GB790483A (en) * 1954-01-02 1958-02-12 Wilhelm Weghuber Improvements in or relating to methods for connecting layers of rock by means of rock anchors in mining operations and means for carrying said methods into effect
DE2506611A1 (de) * 1975-02-17 1976-08-26 Drespa Geb Biebersdorf Ursula Drehbohrkopf fuer bohrungen mit hoher zielgenauigkeit
DE3234406A1 (de) * 1982-09-16 1984-03-22 Joy Manufacturing Co., 15222 Pittsburgh, Pa. Bohrstangenverbindung
EP0274719A2 (fr) * 1987-01-13 1988-07-20 Gd-Anker Gmbh Procédé de réalisation d'un filet et corps tubulaire muni d'un tel filet
EP0355379A2 (fr) * 1988-08-20 1990-02-28 Friedr. Ischebeck GmbH Boulon d'ancrage du type forage-injection
EP0448397A2 (fr) * 1990-03-23 1991-09-25 Conoco Inc. Procédé et dispositif pour forer un puits fortement dévié
DE9004176U1 (de) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen Injektionsbohranker mit Transportschnecke

Also Published As

Publication number Publication date
JPH05209489A (ja) 1993-08-20
DE4136883C2 (de) 1993-10-14
US5388655A (en) 1995-02-14
SG160994G (en) 1995-03-17
DE4136883A1 (de) 1993-05-13
AU654585B2 (en) 1994-11-10
EP0541942B1 (fr) 1994-07-13
AU2715592A (en) 1993-05-13
ATE108509T1 (de) 1994-07-15
CA2081681A1 (fr) 1993-05-10

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