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
  • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
• • 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
  • E21B17/02—Couplings; joints
  • E21B17/08—Casing joints
• • 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
  • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
  • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems

Definitions

• the invention relates to a device for impact or rotary impact drilling in rock material, arranged with a percussion drill string and the diameter of the Schlagbohrgestfites with its diameter exceeding drill bit, the percussion linkage arranged in the axial direction one behind the other and connected by means of a respective sleeve sleeve sections and from a Hüllrohr is surrounded, in the axial direction successively arranged Hüllrohrabête that are secured against rotation, has.
• a device of this kind is known, for example, from WO 00/11302 or from AT 006969 U2.
• Devices of this type allow not only a pure drilling, but also a percussion or rotary impact drilling, as well as a drainage of boreholes and also the creation of anchors, in which case the drill bit is preferably designed as a disposable drill bit.
• the drill bit is preferably designed as a disposable drill bit.
• rinsing agent fed directly over the drill bit the front of the well, which promotes flushing mined material through the openings in the present between the drill string and the cladding cavity, through which cavity the drilling material discharged from the wellbore becomes.
• a drainage or drainage of the borehole can take place.
• each Hüllrohrabêt is individually applied via the drill string, by means of the sleeve which is attached to the bearing sleeve of the subsequent Hüllrohrabiteses, occurring with the impact drilling forces occurring during impact drilling, so that these forces are not transmitted from Hüllrohrabêt to Hüllrohrabrough.
• the Hüllrohrabitese are thus of deformations that could cause these feed forces, kept free, which is essential for the proper functioning of the cladding tube, namely the removal of the mined drilling material and the storage of the drill string.
• the length of the drill pipe sections from sleeve to sleeve by an amount of ... to ... sized larger than the length of a Hüllrohrabiteses.
• a preferred embodiment is characterized in that between the SchlagbohrgestCode and the cladding tube a cavity is provided, that the SchlagbohrgestShe is hollow and that the cladding tube is provided with a passage of the mined drilling material into the interior of the cladding tube enabling passage openings, wherein the cladding tube with two or more distributed around the circumference and directed against the percussion linkage and is provided over its length extending recoveries, which recoveries have the openings.
• the cladding tube gets a particularly high stability, so that for the cladding tube with a small wall thickness Aus Siemens is found.
• the recoveries additionally cause a targeted reduction in cross-section for the effluent flushing agent or the drainage water, which leads to an increase in the flow rate and thus to a much more efficient application of the mined drilling material.
• the passage openings are provided on the drill string nearest the bottom of the recoveries, expediently a plurality of passage openings in the longitudinal direction of the cladding tube are arranged one behind the other.
• the passage openings are formed as longitudinal slots, preferably each two longitudinal slots are provided side by side to form a thin intermediate web, which embodiment offers the advantage that it comes during drilling, especially during rotational impact drilling, to vibrate the intermediate webs, so that the Cuttings pass through the passages particularly easily and cause no congestion on these.
• a plug connection for connecting a further Hüllrohrabiteses is provided at the end of a Hüllrohrabiteses, wherein the plug connection is provided on the Hüllrohrabêt outside in the field of confiscation.
• the connector is formed on the one hand by a provided on a Hüllrohrabêt sleeve and on the other hand provided by an adjacent Hüllrohrabsacrificing, insertable into the sleeve bolts.
• the outer circumference of the cladding tube is circular in cross section and the recesses in the cross section are at least partially circular in shape.
• a further expedient embodiment is characterized in that the outer circumference of the cladding tube is circular in cross-section and the recesses in the cross-section are V-shaped.
• four recesses are arranged distributed uniformly over the circumference of the cladding tube, expediently provided for each cladding tube section two plug-in connections on diametrically opposite recesses.
• At least one jacket tube section without passage openings is provided on the daylight side or on the air side.
• a sealing sleeve which seals the drilled hole between the drilled hole wall and the cladding tube.
• FIG. 1 shows an axial longitudinal section through a device according to the invention, which according to the line II of Fig. 2, which shows an end view in the direction of arrow II of Fig. 1, is guided.
• Fig. 3 shows a side view of a device according to the invention in a drill hole shown cut.
• FIG. 4 illustrates in FIG Schrägrissdarwolf parts of the device according to the invention in an exploded view.
• FIGS. 5a and 5b show a cross-section through a cladding tube in different positions in space and the rinsing agent outflow taking place in the cladding tube.
• 6 and 7 also show cross sections through a cladding tube according to different Asusbuchungsformen and Fig. 8 shows a part of a Hüllrohrabterrorismes with a variation of the passage openings.
• Fig. 1 carries a hollow drill pipe 1, which is designed as Schlagbohrgestnaturee, frontally a drill bit 2, which is provided with through holes 3, which extend from the cavity 4 of the drill pipe 1 and the drill bit 2 outside, so that can be discharged directly from the drill bit 2 into the wellbore 6 through the cavity 4 of the drill pipe 1, whereby not only the mined drilling material can be removed from the drill bit 2, but also the drill bit 2 itself is cooled.
• the drill pipe 1 is composed of individual drill pipe sections 7, which are connected by means of sleeves 8 in the axial direction one behind the other, for example, provided by between the ends of the drill pipe sections 7 and the sleeves 8 screw thread. 9
• the drill string 1 is surrounded on the outside by a cladding tube 10, which is formed by Hüllrohrabêten 11, which are provided one behind the other in the axial direction.
• Each cladding tube section 11 has a circular cross-section which is interrupted by recesses 12, which are directed approximately radially to the central axis of the cladding tube sections 11.
• These recoveries 12 can, as shown in particular FIGS. 5, 6 and 7, be designed in cross-section semicircular or three-quarter circular or V-shaped. Of course, U-shaped cross sections or other functionally identical cross sections for the recoveries 12 are conceivable.
• These recoveries 12 are not quite enough to the outside of the drill string 1, but up to the drill pipe 1 in the cladding tube 10 centering bearing sleeves 13 which are rotatably connected to a respective Hüllrohrabêt 11.
• Hüllrohrabitese 11 are equal to each other, as well as the lengths of the drill pipe sections 7 are equal to each other - with the exception of the drill head supporting drill pipe section, which protrudes for attachment of the drill bit 2 on the first Hüllrohrabites 11, the so-called beginner element.
• This initial element 11 has at both ends of a bearing sleeve 13, the remaining Hüllrohrabête 11 only at the rear end.
• a casing pipe section 11 are to be connected to the device already in the borehole 6.
• the connecting the drill pipe sections 7 sockets 8 are slightly smaller in diameter than the Außern oncemesser the bearing sleeves 13 so that between each sleeve 8 and the sheath 10 is always a game and the drill pipe 1 is centered exclusively on the bearing sleeves 13 relative to the cladding tube 10.
• the Hüllrohrabête 11 are secured against rotation against each other, preferably by means of a connector 14.
• a connector 14 This is according to a particularly advantageous embodiment of an arranged at one end of a Hüllrohrabêtes 11 sleeve 15 and arranged at the end of the adjacent Hüllrohrabêtes 11 bolt 16, in the sleeve 15 can be used formed.
• This bolt 16 is, as can be seen from Fig. 1, formed hollow.
• the connectors are housed in the recoveries 12, so that the circular outer cross section of the cladding tube 10 is not surmounted.
• two plug connections are provided at each end of the Hüllrohrabête, preferably diametrically to the longitudinal axis of the drill string 1.
• the hollow Europedes bolt allows the passage of detergent or drainage water from a Hüllrohrabêt 11 to the next, so that the detergent flow along several Hüllrohrabête in the recoveries can.
• passage openings 17 are provided to the cuttings or degraded drilling material - especially the drilling dust - in the interior of the cladding tube 10, in the between the Cladding tube 10 and the drill pipe 1 existing cavity 18 to enter.
• the passage openings 17 are formed as longitudinal slots, wherein each two of these longitudinal slots 17 are provided side by side to form a thin web 19.
• the webs 19 vibrate, as a result of which the passage openings 17 develop a self-cleaning action, that is, clogging of the passage openings 17 can be largely avoided.
• the passage openings 17 can also have other cross sections. Cuttings with a slightly coarser grain passes primarily through the mutually aligned recoveries 12 from the borehole. 6
• the Hüllrohrabroughe 11 may also be provided on the outer circumference with perforations through which water can penetrate into the cavity 18.
• Fig. 4 shows that cuttings also on the front side of the beginner element in the spaces between the Recoveries 12 can penetrate because the drill bit 2 at their back has a much smaller diameter than the cladding tube 10th
• Fig. 1 further reveals that the sleeves 8 of the drill pipe sections 7 come to rest with their front side on the front side of the bearing sleeves 13, however, the rear end side of a Hüllrohrabêtes 11 comes to rest with the front side of the subsequently arranged Hüllrohrabêtes in distance 20.
• the length L 1 of sleeve 8 to sleeve 8 is dimensioned slightly larger than the length L 2 of Hüllrohrabête 11, by 0.1 to 1.5 mm, preferably by 0.1 to 0.5 mm.
• the Hüllrohrabroughe 11 which have a particular stability and rigidity by the recoveries 12, are designed very thin-walled; the loading of the Hüllrohrabroughe 11 by impacts in the axial direction, as stated above, not on the thin wall of the Hüllrohrabête 11, but on the fixedly connected to the respective Hüllrohrabrough 11 bearing bush 13, against which the end face of the adjacent sleeve 8 beats.
• This allows a particularly lightweight and particularly cost-effective construction, wherein the cladding tube 10 can also be formed from a less solid material such as aluminum (eg as an extruded profile). Also wells of great depth up to 50m and above can be easily made.
• the taglicht masse or air-side end portion 21 of the device has Hüllrohrabitese 11, which have no openings 17.
• the number of provided with für Stammsöffhungen 17 Hüllrohrabête 11 depends entirely on the local requirements of the rock.
• a hole 6 closing sealing sleeve 22 is provided between the last arranged Hüllrohrabites 11 and the borehole wall.
• 5a and 5b show the entry of detergent 5 or drainage water into the interior of the cladding tube 10 and illustrate the Querschittsverengung the channels formed by the recoveries 12 for the effluent 5 and drainage water, which cross-sectional constrictions significantly increase the flow rate of the detergent 5 or the drainage water and thus ensure a better discharge of cuttings.

Landscapes

• Engineering & Computer Science (AREA)
• Geology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Mining & Mineral Resources (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• Physics & Mathematics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Mechanical Engineering (AREA)
• Earth Drilling (AREA)
• Thermal Transfer Or Thermal Recording In General (AREA)
• Lubricants (AREA)
• Led Devices (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39186822

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (6)

• 2006
  • 2006-11-29 AT AT0198306A patent/AT504560B1/de not_active IP Right Cessation
• 2007
  • 2007-11-29 AT AT07845268T patent/ATE503075T1/de active
  • 2007-11-29 DE DE502007006805T patent/DE502007006805D1/de active Active
  • 2007-11-29 WO PCT/AT2007/000535 patent/WO2008064384A1/fr active Application Filing
  • 2007-11-29 EP EP07845268A patent/EP2094933B1/fr not_active Not-in-force

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events