DE3015695A1 - DRILL RODS FOR A COUNTERBURNING TOOL - Google Patents

Description

DIPL.-ING. HORST ROSE - «ίΤ-DIPL.-ING. PETER KOSEL

Our file number: 1774/832 Bad Gandersheim, April 23, 1980

Salzgitter machines and
Investments joint-stock company

Drill rods for a countersink drilling tool

The invention relates to a drill string for a countersinking tool, e.g. Countersink hammer or a countersink turbine, with a Outer pipe and two lines arranged inside the outer pipe, with three channels inside the outer pipe exist and a drive medium through one of these channels can be fed to the drilling tool and can be fed back again after the work has been performed and through the third channel a flushing medium can be fed to the drilling tool.

A known one-piece boring bar of this type,

(DE-AS 1 091 507) is for the connection of a pneumatic Descending hammer determined. Inside the outer tube i3t with the formation of an outer ring channel and an intermediate tube and within the intermediate tube with the formation of an intermediate ring channel arranged an inner tube which encloses an inner channel. The outer tube is on the one hand with an output shaft a rotary drilling machine remaining outside the borehole and, on the other hand, with the pneumatic one Countersunk hammer screwed. The inner channel feeds compressed air to the drop hammer, the outer ring channel the Exhaust air and the intermediate ring channel rinsing liquid to the work area. The discharge of flushing fluid and cuttings happens between the outer pipe and the borehole wall, The

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Channels are each through a perforated disc on connecting bores of the output shaft and the Lowering hammer connected. A ring extends from each disk, forming the inner tube and the intermediate tube positioned relative to each other and to the outer tube. Neither the inner tube nor the intermediate tube are supported or positioned on their remaining length, so that the working length of the boring bar is limited and its weight because of the strength requirements Wall thickness of the inner tube and intermediate tube are relatively high.

The invention is based on the object, possibly composed of several extension drill rods With sufficient strength, drill rods are relatively easy to build and at least approximately constant distance of the lines from one another and from the outer pipe and thus symmetrical flow conditions to ensure in the drill pipe.

This object is achieved according to the invention in that the outer tube and the two lines each through Spacer elements distributed over their length at a distance ναι-from one another The thinner wall thickness of the two lines made possible by this creates the same Outer diameter of the drill string in a desirable manner larger flow cross-sections, The relative positioning the lines and the outer pipe is guaranteed over the entire length of the drill string. The assembly the individual boring bar or the extension boring bar is considerably simplified. The flushing medium and the cuttings can also be carried out of the borehole in the annular space between the outer pipe and the borehole wall will.

According to one embodiment of the invention, the two lines as a 2 _w i _sc and are within iienrohr

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of the intermediate pipe arranged inner line formed. The inner line preferably also consists of a pipe.

According to a further embodiment of the invention, the spacer elements effective between the intermediate pipe and the inner line are designed as protrusions locally molded into the intermediate pipe. ^ eI -the comparatively small wall thickness of the intermediate tube, these warts can be produced with little effort and high manufacturing accuracy. No separate or additional spacer elements are required for the relative positioning of the intermediate pipe and the inner line. For assembly, the inner line is simply and quickly pushed into the intermediate pipe.

According to another embodiment of the invention the spacer elements effective between the outer tube and the intermediate tube are designed as bodies held in position by a cage. The bodies can e.g. made of polyamide and the cage tubular made of sheet steel or polyvinyl chloride.

A particularly simple assembly with secure positioning results if, according to the invention, each body Is designed like a plug and with a part of a relatively small cross-sectional area from the outside extends through an opening in the cage and in contact with the intermediate tube.

According to another embodiment of the invention, each body is designed as a ball. Then are at simple assembly, the flow conditions in the drill pipe are relatively favorable.

Particularly low manufacturing costs result if, according to the invention, between the outer tube and 'the Spacer elements effective between pipe than by

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Fungen in the intermediate pipe held in position body, ζ, B, spheres or conical bodies are formed. as such depressions can, for example, be the concave rear indentations of the aforementioned protrusions of the intermediate tube to serve,

According to one embodiment of the invention, the two lines designed as mutually parallel tubes.

According to a further embodiment of the invention each spacer element is designed as a disc having axial perforations. Each disc can according to the invention on the associated intermediate pipe or on the associated inner line or on the two parallel ones Be attached to pipes. According to the invention, however, each disk can also have an extension in a recess of the adjacent one Engage tube and be positioned in this way in the axial direction.

Particularly favorable weight ratios result; if, according to one embodiment of the invention, the inner line is designed as a hose. If necessary, the hose can be made pressure-resistant.

One embodiment of the invention is characterized in that that at one end of the drill string or at one end of each extension drill rod of the Drill rods at the end of each of the two lines a sleeve is arranged, in which a nozzle of the corresponding Line of an adjacent extension boring bar or a connection element can be inserted in a sealed manner. Such connection elements can, for example, be a connection head with bushings for the drive medium and the flushing medium or the countersinking tool. The connection can in all cases by a tapered screw connection with the adjacent outer tube of the drill string. It is a light, fast and safe coupling of the

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Drill rod guaranteed with each other and with the connecting elements.

According to a further embodiment of the invention
is an inner sleeve of the inner pipe inside and inside

Spaced from an intermediate sleeve of the intermediate tube, wherein an outer annular passage between the outer tube and the intermediate tube through openings in a wall of 2 _w i _sc ji _en inuffe erlängerungsbohrstange with the outer annular channel of the adjacent ^ or of the connecting element

is connectable,

Another embodiment of the invention is characterized in that when the two lines are designed as parallel pipes, their sleeves are combined into a common sleeve piece inserted into the outer pipe, the channel between the parallel pipes and the outer pipe with the corresponding channel of the
adjacent extension boring bar or the connection element can be connected via openings in the socket piece,

Although to explain the invention above
three channels within the outer tube were mentioned,
the features according to the invention also apply to a drill rod in the outer tube of which more than three channels run.

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The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawings, Show it:

Fig. 1 is a side view rotated by 90 ° of a sinkhole located in the borehole with extension drill rod,

FIGS. 2 to 4 each show a part of a longitudinal section by an extension boring bar according to FIG. 1 in yer ~ larger representation,

Fig. 5 shows the cross section according to line V-V in Fig. 3,

6 shows a half cross section through another embodiment of the extension drill rod,

FIGS. 7 and 8 each have two quarters of further embodiments of extension boring bars in cross section,

9 shows a longitudinal section through a socket end of another embodiment of an extension drill rod,

FIG. 10 shows a longitudinal section through a socket end of the extension drill rod according to FIG. 9,

11 shows the sectional view along line XI-XI in Figure 9,

FIG. 12 shows the sectional view along line XII-XII in FIG. 9 _?

13 shows a longitudinal section through part of a connection between two further extension drill rods,

14 shows a longitudinal section through part of a Connection of two further extension boring bars and

15 shows the sectional view along line XV-XV in FIG. 14.

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Pig. shows, rotated 90, one in a borehole submerged hydraulic countersink drill 2 with which an extension drill rod 3 with extension drill rods 4 and 5 is screwed,

Figures 2 to 5 show details of the extension drill rod 4th

According to Pig. 2 is a connecting sleeve 7 with a conical in an outer tube 6 of the extension drill rod 4 Internal thread 8 welded in. At the opposite end, a connecting piece is in the outer tube 6 according to Pig, 4 9 welded in with a complementary conical external thread 10. On an inner face the connecting sleeve 7 (Pig. 2) and on an inner end face 12 of the connecting piece 9 rests on a cage 13 designed as a thin-walled steel tube, which has openings 14 (- ^ ig. 3 and 5) is provided, through which a relatively thin part of a plug-like body 16 extends. A relatively thick part 17 of the body 16 rests on the one hand on the outside the cage 13 and, on the other hand, with a rounded contact surface on an inner wall 18 of the outer tube 6 at.

At the free end of the thin part 15 is a Intermediate pipe 19 on. The bodies 16 therefore serve as stand-off elements and define an outer ring channel 20 between the inner wall 18 of the outer tube 6 and the intermediate tube 19. The outer ring channel 20 is on the one hand above an annular space 21 in the connecting sleeve 7 and on the other hand via a number of bores 22 distributed over the circumference, an annular groove 23 and an annular space 24 in the connection piece 9 connected to the environment.

The left end of the intermediate tube 19 protrudes according to Pig. 2 outwards over the end of the connecting sleeve 7 out,

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In Fig. 4 is of the extension drill rod 5 below other an intermediate pipe 19 'drawn, the left end, sealed by a sealing ring 25, in an intermediate sleeve 26 of the connecting piece 9 is introduced

0 "is 3. With this intermediate sleeve 26, according to FIG right end of the intermediate tube 19 welded.

The cage 13 is shown in FIG. 3 by a number of bores 27 interspersed, which allows a practically unhindered flow exchange to completely fill the outer ring channel 20 on both sides of the cage 13 allow. These Bores 27 are provided in sufficient distribution and number.

An inner tube 28 and 28 'is arranged within the intermediate tube 19 »19 *. An inner ring channel 29, 29 'is defined between the intermediate pipe 19, 19' and the inner pipe 28, 28 '. For this purpose, warts 30,30 'are locally formed as spacer elements from the outside into the intermediate tube 19, 19 ^f. According to FIGS. 2 and 4, the left end of the inner tube 28, 28 'protrudes to the left beyond the left end of the associated intermediate tube 19, 19'. 4 shows how the left end of the inner tube 28 ′, sealed by a sealing ring 31, is inserted into an inner sleeve 32 arranged inside and at a distance from the intermediate sleeve 26. According to FIG. 4, the right end of the inner tube 28 is welded to the inner sleeve 32. The inner ring channel 29 is constantly connected to the inner ring channel 29 ′ via an annular space 33 which exists between the intermediate sleeve 26 and the inner sleeve 32.

The inner tube 28, 28 'encloses an inner channel in each case 34,34 ', which according to FIG. 4 are continuously connected to one another via a chamber 35 of the inner sleeve 32.

The inner tube 28 * is also part of the extension boring bar 5. To clarify the drawing

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nerischen representation is in Fig, - 4 that of the Connection sleeve 7 according to FIG. 2 corresponding connection sleeve the extension boring bar 5 is omitted.

In the inner channel 34, 34 'is the sink drill hydraulic fluid under pressure is supplied to drive and control its striking mechanism, which flows back through the inner ring channel 29,29 'after the work has been done. Through the outer ring channel 20 is a Drilling tool 36 (Fig. 1) of the sink hammer 2 a flushing medium, E.g. air or water or a mixture of air and water is supplied. The flushing medium and the cuttings are discharged through an annular gap 37 between a wall of the borehole 1 and the lowering hammer 2 or the extension drill rod 3. In Fig, 2 are corresponding Flow arrows entered for clarity.

In the following figures, the same parts as in FIGS. 1 to 4 are provided with the same reference numbers.

According to FIG. 6, a disk 38 is arranged as a spacer element between the outer tube 6 and the wiper tube 19, which extends at right angles to a longitudinal axis of the extension drill rod 4 and is provided with axial openings 39 distributed over the circumference. The disk 38 engages with a radial extension 40 in a recess of the ² wiper tube 19, which was created on the back of one of the warts 30. The disk 38 is secured in the axial direction by this extension 40. Depending on the length of the extension drill rod 4, more or less such disks 38 are arranged at an axial distance from one another. The flushing medium can pass through the openings 39 practically unhindered. The disk 38 is made of resilient material, so that the extension 40 is initially bent over resiliently on the outer surface of the intermediate tube

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19 slides along until it snaps into the recess 41 of the intermediate tube 19 at the desired axial position.

Pig. 7 shows in the upper and lower halves, respectively different execution farms. In the upper Half of the spacer elements are held in position by the recesses 41 of the wiper tube 19, balls 42 which are in contact with the inner wall 18 of the outer tube 6 are formed. For example, there can be four such Balls 42 be distributed at regular intervals over the circumference, corresponding to the plug-like Bodies 16 in FIG. 5.

The lower half of Fig. 7 shows instead of the balls 42 conical body 43, each of which with a rounded tip is seated in one of the recesses 41 and has a cylindrical shape that is rounded according to the inner wall The outer surface rests against the inner wall 18.

In Fig. 8, again, different embodiments are drawn in the upper and lower halves.

Balls 44, which are located on the outside of the intermediate tube 19 and on the inner wall 18 of the outer tube 6, serve as spacer elements lie. In the upper half of Fig. 8, the balls 44 are through a roughly in the middle of the outer ring channel 20 extending cage 45 made of plastic held in position. The positioning of the balls 44 takes place according to the lower half of Fig. 8 'by a tubular Cage 46 made of plastic, which rests against the intermediate tube 19. In both cases, openings for receiving and guiding the balls 44 are provided in the cages 45, 46 and also in the case of the cage 45 bores 27 which allow the flushing medium to pass through.

In the exemplary embodiment according to FIGS. 9 to 12, within the outer tubes 6, 6 'of the extension boring rods 4, 5 each two to one another and to the outer

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tube 6,6 'parallel tube 47,47' and 48,48 'arranged. According to FIG. 9, the tubes 47, 48 are welded with their right-hand end into a socket piece 49, which can be rotated into the Outer tube 6 is used. The tubes 47, 47 'and 48, 48' are formed by spacer elements designed as disks 50 passed through and attached to them e.g. by welding. Such a disk 50 is shown in FIG. The disks 50 are rotatably supported on the inner wall 18, 18 'of the outer tube 6, 6'. The disks 50 have according to Figures 9 and 11 axial openings 39 for that Medium which flows in the channel 51 »51 'between the pipes 47, 48 and 47', 48 'and the outer pipe 6, 6'.

The socket piece 49 has a sealing ring 52 and 53 which are in alignment with the pipes 47, 48 Recesses 54 and 55 in an end face 56. The socket piece 49 also has openings 57, which establish the connection between the channels 51, 51 '.

According to FIG. 10, the left ends of the tubes 47 ', 48' are fastened in a connecting piece 58 which is located in the outer tube 6 'is freely rotatably mounted and has openings 59, which the openings 57 and the channel 51 connect to channel 51 '. Supported on this connection an annular groove 60 in the outer tube 6 ', which, like the end position of the end face shown in dash-dotted lines 56 of the socket piece 49 shows, remains free even when the outer pipe 6 ′ is screwed to the outer pipe 6 In this state, the ends of the tubes 47 ', 48' on the left in FIG. 10 are inserted into the recesses 54, 55 in a sealed manner.

The pipes 48 ', 48 can be used, for example, to supply the hydraulic pressure fluid and the pipes 47, 47' to their Return lines are used, while the channel 51 ', 51 according to the arrows shown in FIG. 10, the flushing medium leads.

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In the embodiment according to Pig. 13, the inner lines are designed as hoses 61.61 '. This in Fig. 13 right end of the hose 61 is fastened by a compression fitting 62 to the sleeve 32, while 13, the left end of the hose 61 'is connected to a connector 64-' by a compression fitting 63 ' which, according to FIG. 13, engages in the inner sleeve 32. The outer parts of the compression fittings 62,63 'lie on the inside of the intermediate tubes 19 »19 * and have openings 65,66 'for the respective flowing medium in the inner ring channel 29,29'.

The _w between the Z i _sc henrohren 19,19 'and the outer pipes 6,6' effective distance elements are constructed as annular discs 67 'are attached, and through holes 68 for the in the outer annular channel 20,20' to the intermediate tubes 19,19 have flowing medium. A connecting piece 69 'for the end of the wiper tube 19 * on the left in FIG. 13 is also equipped with such openings 70'.

According to the embodiment in Figures 14 and 15 between the inner tubes 28,28 'and the Intermediate tubes 19,19 'effective spacer elements as on the inner tubes 28,28' attached disks 71,71 ', which rest on the intermediate tubes 19,19 'and openings 72,72' for the inner ring channel 29, 29 'have flowing medium.

Fig. 15 shows an annular disc 67 ', 71' each with associated openings 68 ', 72',

Patent attorneys Dipl.-lng. Horst Rose Dipl.-Ing. Peter Kosei

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Claims (1)

DIPL-ING. HORST ROSE DIPL-ING. PETER KOSEL PATENT LAWYERS Our file number: 1774/832 Bad ^ andersheim, April 23, 1980 Salzgitter machines and
Investments joint-stock company • Claims 1, drill pipe for a downhole migration Countersink drilling tool, e.g. a countersink drill or a sinking turbine, with an outer tube and two lines arranged inside the outer tube, with inside There are three channels of the outer tube and a drive medium to the drilling tool through one of these channels can be fed in and can be fed back again after the work has been done and through the third channel dem A flushing medium can be fed to the drilling tool, characterized in that the outer tube (6, 6 ') and the two Lines (19.19 ', 28.28 ^ 47.47', 48.4S ') each through Spacers distributed over their length are kept at a distance from one another. 2, drill rod according to claim 1, characterized in that that the two lines as an intermediate pipe (19 »19 ') and one inside the intermediate pipe (19,19 *) arranged inner line (28,28 '; 61,61') formed are. 3, drill rod according to claim 2, characterized in that that between the intermediate tube (19 »19 ') and the inner line (28,28 ') effective spacer elements as locally formed in the intermediate pipe (19,19') projections PK / Es -14- 130044/0276 (30.3O ¹ ) are formed. 4. Drill rod according to one of claims 1 to 3, characterized in that the between the outer tube (6,6 ') and the intermediate tube (19 »19') effective spacer elements than held in position by a cage (13 »45» 46) Body (16; 44) are formed. 5. Drill rod according to claim 4, characterized in that each body (16) is designed like a plug is and with a part (15) of a relatively small cross-sectional area from the outside through a Opening (14) in the cage (13) and in contact with the intermediate tube (19 »19 ') extends. 6. Drill rod according to claim 4, characterized in that each body is designed as a ball (44) 7. Drill rod according to one of claims 1 to 3, characterized in that the between the outer tube (6.6 *) and the intermediate tube (19.19 *) effective spacer elements as bodies held in position by recesses (41) in the intermediate tube (19, 19 '), e.g. balls (42) or conical bodies (43) are formed. 8. drill rod according to claim 1, characterized in that that the two lines are designed as mutually parallel tubes (47, 48, 47 ', 48'). 9. Drill rod according to one of claims 1 to 8, characterized in that each spacer element as axial openings (39; 68,68 '; 72,72') having Disc (38; 50; 67,67 '; 71,71') is formed. 10. Drill rod according to claim 9, characterized in that each disc (50; 67,67 '; 71,71') on the associated Intermediate pipe (19, 19 ') or on the associated Inner line (28,28 ') or on the two parallel ones —1 5— 130044/0276 Pipes (47,48,47 ', 48') is attached. 11. drill rod according to claim 9, characterized in that that each disc (38) engages with an extension (40) in a recess (41) of the adjacent tube (19). 12. Drill rod according to one of claims 2 to 7 and 9 to 11, characterized in that the inner line is designed as a hose (61,61 '). 13. Drill rod according to one of claims 1 to 12, characterized in that at one end of the drill rod (3) or at one end of each extension drill rod (4; 5) of the drill string (3) at the end of each of the two lines (19.19 ', 28.28'; 61.61 '; 47.47', 48.48 ') a sleeve (26, 32; 49) is arranged into which a nozzle (64 ') of the corresponding line (61') of an adjacent one Extension boring bar or a connection element can be inserted in a sealed manner. 14. Drill rod according to claim 13, characterized in that that an inner sleeve (32) of the inner line (28, 28 '; 61,61') within and at a distance from an intermediate sleeve (26) of the intermediate tube (19, 19 ') is arranged, and that an outer ring channel (20) between the outer tube (6) and the intermediate pipe (19) via openings (22) in a wall of the intermediate sleeve (26) with the outer ring channel (20 ') of the adjacent extension drill rod (5) or of the connecting element can be connected. 15. Drill rod according to claim 14, characterized in that a sealing area (cf. 31) of the inner sleeve (32) is arranged at an axial distance from a sealing area (cf. 25) of the intermediate sleeve (26). 16. Drill rod according to claim 13, characterized in that when the two lines are formed as -16- 130044/0276 parallel pipes (47,48,4-7 ', 48') their sleeves to one common socket piece (49) rotatably inserted into the outer tube (6,6 ') are combined so that the channel (51) between the parallel tubes (47,48) and the outer tube (6) can be connected to the corresponding channel (51 ^f ) of the adjacent extension drill rod (5) or the connection element via openings (57) in the socket piece (49), and that the spacer elements (50) in the outer tube (6,6 ') are rotatable. Patent attorneys Dipl.-lng. Horst Rose DIP. Peter Kose! 130044/0276