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
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
• • 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
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
  • E21B7/201—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means

Definitions

• the present invention relates to a method of drilling, in particular impact or rotary impact drilling, of holes in soil or rock material, wherein a drill hole is formed by a drill bit mounted on a drill string by a striking and / or rotating movement and one with the drill bit Coupled cladding tube is introduced into the wellbore, as well as to a device for drilling, in particular impact or rotary impact drilling, holes in soil or rock material, wherein a drill bit mounted on a drill bit by a striking and / or rotating movement forms a borehole and with a the drill bit coupled cladding tube is introduced into the wellbore.
• a borehole is a prerequisite that the cladding tube is designed to be thin or light, so as not to excessive stress or to give strain when introducing the cladding tube into the interior of the borehole.
• a cladding tube or jacket tube is introduced into the interior of the borehole by impact on the end projecting from the borehole, separated from the drill bit.
• embodiments are known in which the entire drilling work or the entire Bohrvortrieb is transferred by a shock stress on a correspondingly solid trained casing tube on the drill bit.
• the present invention aims, starting from a method and a device of the type mentioned, to provide a method and an apparatus for drilling holes in soil or rock material, wherein in a simple embodiment not only an accurate and targeted drilling is made possible over long lengths, but which also advantages of a thin-walled cladding tube can be used.
• a method of the type mentioned is essentially characterized in that the cladding tube is received in a receptacle on the end facing away from the excavation surface of the drill bit end of a tubular coupled to the drill bit, and that the sheath tube to that of the Bohrkrone end facing a shock or compressive stress is subjected.
• the cladding tube is received in a receptacle of a jacket tube coupled to the drill bit and the cladding tube is subjected to a separate impact or compressive stress at the end facing away from the drill bit, it is made possible that a jacket tube coupled to the drill bit, which a has comparatively short length, is introduced during drilling, so that over the casing pipe a targeted and accurate drilling is ensured.
• the cladding tube is introduced separately by a shock or compressive stress in the interior of the wellbore, so that not exerted by the drill bit or a, for example, in the field of drill bit arranged beater a correspondingly high energy to the entire, to be introduced into the borehole casing must become.
• the subsequent cladding tube which usually has a lower strength, can be introduced into the interior of the borehole correspondingly simply and without excessive frictional resistance even by providing a correspondingly lower impact or compressive stress can.
• the force acting on the end facing away from the drill bit compressive stress on the cladding tube is chosen to be less than a force exerted by the drill bit on the casing pipe tensile stress.
• the fact that the compressive stress on the cladding tube is chosen to be less than the tensile stress exerted on the jacket tube ensures that the cladding tube, which is advantageously accommodated only with a simple plug connection in the receptacle of the jacket tube, is not introduced into the borehole to a greater extent. as this is the case for the drill bit and the jacket tube coupled thereto, so that no compression stresses are exerted on the cladding tube.
• the drill bit is rotatably supported relative to the jacket tube and / or jacket tube ,
• mined material via at least one opening in the region of the junction between the drill bit and the casing pipe and / or a distance from the junction between the drill bit and jacket tube provided passage opening is introduced into the defined between the outer periphery of the drill string and the inner circumference of the casing tube and the adjoining casing and annulus is discharged from the wellbore.
• a device of the type mentioned is essentially characterized in that the cladding tube is received in a receptacle on the side facing away from the excavation surface of the drill bit end of a coupled with the drill casing casing, and that a shock or compressive stress is exerted on the end facing away from the drill bit end of the cladding tube.
• a sleeve-like intermediate element for transmitting a force exerted by the drill string on the casing tensile stress to couple the casing tube with the drill bit.
• Such a sleeve-like intermediate element can be produced in a simple manner and provides a proper and reliable power transmission between the drill pipe, which is coupled directly to the drill bit for performing the drilling work, and the jacket tube.
• a sleeve-like intermediate element is provided for transmitting a pressure exerted by the drill string on the sheath tube compressive stress.
• a stop face of the sleeve-shaped intermediate elements between the drill string and the casing tube and between the drill string and the end of the cladding tube facing away from the drill bit is formed in each case by an abutment surface enclosing an acute angle with the longitudinal axis of the drill string and the casing tube and the cladding tube, which with corresponding, complementary abutment surfaces of the drill string or an adapter coupled thereto.
• abutment surfaces can be provided correspondingly inexpensively and precisely for a proper and reliable power transmission or insertion both in the jacket tube and in the cladding tube.
• the abutment surface of the intermediate element between the drill string and the jacket tube is larger than the abutment surface of the intermediate element between the drill string and the end of the cladding tube facing away from the drill bit, thereby ensuring that, as already stated above, the tensile stress transferred to the jacket tube is greater than the impact stress applied to the jacket tube.
• the drill bit is rotatably mounted relative to the jacket tube and / or cladding tube, so that is reliably prevented that in addition to the required rotational movement of the drill bit a rectilinear Both the jacket tube and the cladding tube are introduced into the interior of the borehole.
• the outer diameter of the casing tube can be matched exactly to the dimensions of the borehole to be produced, wherein the casing tube has a correspondingly short length, so that frictional forces can be reliably overcome by a precisely fitting contact of the casing tube to the borehole inside wall, while the subsequent casing tube can be introduced easily and without large frictional resistance in the interior of the well corresponding reduced diameter.
• the jacket tube has a cross section which is reinforced with respect to the cladding tube and / or increased strength. Characterized in that the jacket tube has a reinforced cross-section and / or increased strength, it is ensured that deviations from the desired drilling direction are prevented by the strength or rigidity of the jacket tube.
• sleeve-like elements are provided for connecting mutually adjacent cladding tube elements, which overlap each adjoining end portions of Hüllrohremia and formed with projections or surveys or can be formed which engage in complementary recesses or recesses on the circumference of the Hüllrohremia.
• Such projections or elevations which engage in complementary depressions or recesses, can not only be produced simply and cost-effectively, but also enable a normally reliable drilling or reliable connection or coupling when extending sheath tube sections as a simple connection compared to conventional screw connections.
• Such recesses or recesses and projections or elevations are not as easily exposed to damage, as is the case with known screw connections for extending sheathed tubular elements.
• the sleeve-like elements are formed in the region of the projections or elevations with reduced material cross-section and that the projections or projections after arranging the sleeve-like elements on the outer circumference of each other Hüll- pipe elements to be connected corresponding to the recesses of the Hüllrohretti can be formed.
• sleeve-like elements for connecting adjacent cladding elements is in accordance with a Further preferred embodiment proposed that additional securing elements, such as bolt-shaped pins or pins, are provided for positioning and / or fixing the sleeve-like elements, whereby connection positions can be maintained according to safe.
• additional securing elements such as bolt-shaped pins or pins
• the drill bit or an adapter connected thereto its rear side facing away from the excavation surface is provided with a polygonal profiling which, when withdrawn relative to the casing tube, enters into a complementary, polygonal receiving opening of the adapter or intermediate element for coupling to the casing tube.
• At least one passage opening is provided at the periphery of the casing tube at a distance from the junction between the drill bit and / or the adapter and the jacket tube, which in the interior of between the outer periphery of the drill string and the annular space defined by the inner circumference of the jacket tube opens.
• FIG. 1 shows a sectional view of a device according to the invention for carrying out the method according to the invention
• FIG. 2 is a side view, partially in section, of the device according to the invention, similar to FIG. 1;
• FIG. 1 shows a sectional view of a device according to the invention for carrying out the method according to the invention
• FIG. 2 is a side view, partially in section, of the device according to the invention, similar to FIG. 1;
• FIG. 2 is a side view, partially in section, of the device according to the invention, similar to FIG. 1;
• FIG. 3 shows an enlarged scale an adapter of the device according to the invention for coupling the drill bit with the drill pipe and for transmitting a tensile stress on the casing tube adjoining the drill bit;
• FIG. 4 is a schematic sectional view of the portion of the coupling between the drill pipe and the cladding tube for applying impact or compressive stress to the cladding tube of the device according to the invention
• Fig. 5 shows perspective views of intermediate elements, wherein Fig. 5a is a representation of the intermediate element, which serves to transmit a compressive stress from the drill pipe to the cladding tube, while Figure 5b is an illustration of an intermediate element for transmitting a tensile stress from the drill pipe to the casing pipe.
• FIG. 6 is an enlarged view of a connection between adjacent sheath tubes;
• FIG. Figure 7 is a section along the line VII of Figure 6 through the connection of adjacent Hüllrschreibiana, wherein Figure 6 is a view in the direction of arrow VI of Figure 7 ..;
• Fig. 8 in a representation similar to Figure 2 is a side view of the device according to the invention, wherein only the region of the jacket tube for the removal of mined material is indicated;
• FIG. 9 is a partial sectional view of the embodiment according to FIG. 8, wherein, just as in FIG. 8, the drill bit is arranged at a distance from the jacket tube;
• FIG. 10 shows, in a representation similar to FIG. 9, the drill bit in a position retracted in contact with the jacket tube;
• FIGS. 1 and 2 it can be seen that a generally designated 1 device for drilling or rotary impact drilling has a schematically indicated with 2 drill bit, which via a drill pipe 3 to a percussion or rotary impact drilling for the reduction of in Figs. 1 and 2 is formed unspecified material.
• To the drill bit 2 includes a jacket tube 4 with comparatively thick cross-section or high strength, wherein at the end remote from the drill bit 2 end of the jacket tube 4 has a receptacle 5, in which a cladding tube 6 is added, wherein the cladding tube 6 not only one overall compared to the diameter D of the jacket tube 4 has reduced diameter d, but also has a smaller wall thickness and lower strength.
• the drill bit 2 is directly coupled to the drill pipe 3 via an adapter 7 shown in detail in FIG. 3, wherein via this adapter 7 also a entrainment, in particular a tensile stress of the casing tube 4 takes place via an intermediate element 8 shown in detail in FIG. 5b.
• the jacket tube 4 has a comparatively large length and in addition to a corresponding strength also has a diameter D which largely corresponds to the formed by the drill bit 2 dimensions of the borehole, which is not shown in detail, is through the jacket tube 4th ensures that accurate drilling is feasible.
• the cladding tube 6 accommodated in the receptacle 5 at the end of the jacket tube 4 facing away from the drill bit 2 is likewise subjected to pressure by the drill string 3 via a further intermediate element 10, which is shown in greater detail in FIGS. 4 and 5a, so that the Cladding tube 6 is also introduced according to the arrow 11 in a propulsion of the drill bit 2 in the borehole.
• through-pass channels 15 and outlet openings 16 for flushing the drill bit 2 and / or entrainment of degraded material are additionally indicated in the adapter 7, as will be discussed in more detail below.
• the intermediate element 10 For impact or pressurization of the cladding tube 6, the intermediate element 10 is provided, which is shown in Fig. 4 and 5a in detail.
• the abutment surfaces of both the adapter 7 and the drill rod 3 and the abutment surfaces 13 and 18 of the sleeve-shaped intermediate elements 8 and 10 are each to the longitudinal axis of the drill string, which in FIG is indicated, inclined.
• a sleeve-like element 21 is provided in each case, wherein the interior of the sheath 6 protruding projections or projections 22 are indicated, which in corresponding recesses or recesses 23 of the cladding tube for a secure connection of adjacent Hüllrohrianan 6 'and 6 "engage.
• the projections or elevations 22 may already be formed beforehand, so that the sleeve element 21 must have a corresponding elasticity when connecting adjacent sheath tube elements 6 'and 6 ", or they may be arranged after arranging the sleeve-like element 21 in the region of the tube elements 6 to be joined together 'and 6 "are formed by a simple tool in the range of predetermined breaking points.
• the adapter 7 is polygonal in the region of the connection to the drill bit 2, in particular substantially triangular with rounded corners, so that in this part, a material entry into the ring or free space between the drill pipe 3 and the adapter 7 and the casing tube 4 can be made.
• the polygonal formation 32, 33 of the protruding from the casing pipe portion 4 of the adapter 7 and the intermediate element 8 ensures that behind the drill bit 2 befindliches mined material is largely crushed, so that a safe removal is possible.
• a guide 28 is formed at the foremost portion of the drill pipe 3, which of a thread-like profiling or a screw conveyor is formed.
• the screw conveyor or guide device 28 is also already schematically indicated in FIGS. 1 and 2.
• targeted and accurate drilling can thus be improved by targeted removal of the degraded material, the drilling speed and increase the directional accuracy.
• the drill bit 2 can be withdrawn in abutment with the jacket tube 4 according to the arrow 29, whereby a displacement of the guide or screw conveyor 28 takes place relative to the passage openings 24 , so that a cleaning effect of the passage openings 24 can be achieved by the entrainment effect.
• a rotational movement of the drill pipe 2 against the actual degradation direction ie, for example, in the clockwise direction in the illustration shown in FIGS. 9 and 10
• a cleaning of the through-hole Trittso réelleen 24 are effected by the reverse conveying direction of the screw conveyor 28.
• the drill bit 2 is again acted upon in the direction of the arrow 30 in FIG. 9 to continue the degradation process.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Physics & Mathematics (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Earth Drilling (AREA)

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Publications (2)

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• 2003
  • 2003-10-01 AT AT0155903A patent/AT413231B/de not_active IP Right Cessation
• 2004
  • 2004-09-28 KR KR1020067006488A patent/KR20060093110A/ko not_active Application Discontinuation
  • 2004-09-28 JP JP2006529426A patent/JP2007507626A/ja active Pending
  • 2004-09-28 DE DE502004003985T patent/DE502004003985D1/de not_active Expired - Lifetime
  • 2004-09-28 CN CNA200480028735XA patent/CN1863980A/zh active Pending
  • 2004-09-28 ES ES04761047T patent/ES2286654T3/es not_active Expired - Lifetime
  • 2004-09-28 WO PCT/AT2004/000325 patent/WO2005031108A1/fr active IP Right Grant
  • 2004-09-28 AU AU2004276366A patent/AU2004276366B2/en not_active Ceased
  • 2004-09-28 PL PL04761047T patent/PL1668221T3/pl unknown
  • 2004-09-28 EP EP04761047A patent/EP1668221B1/fr not_active Expired - Lifetime
  • 2004-09-28 PT PT04761047T patent/PT1668221E/pt unknown
  • 2004-09-28 CA CA002540569A patent/CA2540569A1/fr not_active Abandoned
  • 2004-09-28 DK DK04761047T patent/DK1668221T3/da active
  • 2004-09-28 AT AT04761047T patent/ATE363580T1/de active
• 2006
  • 2006-03-29 ZA ZA200602574A patent/ZA200602574B/en unknown
  • 2006-04-03 US US11/395,291 patent/US7195081B2/en not_active Expired - Fee Related
  • 2006-04-11 HR HR20060140A patent/HRP20060140A2/hr not_active Application Discontinuation

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