SE448015B - DRILL CHRONICLE WITH SPREADED CUTTING ELEMENTS AND METHOD FOR LOCATING THE CUTTING ELEMENTS - Google Patents

Description

10 448 015 drill cutters are arranged in groups at equal intervals in one group, but varying intervals in other groups, or increases the space in each row from a minimum to one maximum and back to the minimum value, or varied the drill screen spacing in each row so that each pair of drill bits are spaced apart by a distance of differs from the distance between all other pairs of drill bits in the row.

In all the above-described, prior art solutions, the drill bits are arranged in peripheral rows. The rows are arranged on a minimum distance between them to achieve sufficient supporting metal for the drill bits. In order to prevent one ridge from being created between the rows, another can inserts, which are in the same track or path have rows, to remove the material, there otherwise such ridges would form. Another method is to diagonally displace the cutting steel itself from the second cutting the steel in the groove, as shown in U.S. Patent Application No. 043,533, filed May 29, 1979. Sometimes it happens that crowns rotates "off-center", which means that the rotation of the crown shaft is displaced during drilling from the center of the borehole. shoulder. One result of this phenomenon is that ridges are created, even between diagonally offset rows on the different ones the cutting steel.

There are also previously known cutting steels, which have annular shapes rows that overlap each other without intermediate spaces.

In US-A-3,726,350, the cutting steel has half rows, which are shot apart. U.S. Pat. No. 2,774,571 discloses the use of the inner end or "tip" of each cutting steel, exhibiting such an arrangement. US-A-2 230 569 is written a large number of designs of cutting steel with milled teeth, including helical rows of teeth. Also shoulder shaped cutting steels with spiral rows have previously come into use. 448 015 As far as is known to the applicant, the former has teeth or the inserts are always arranged in rows. The rows can be arranged peripherally or perpendicular to the axis of the cutting steel, or the drill bits in the row can extend only partially around the drill steel. The rows can be parallel to the shaft of the steel, or the rows may be helical so- as mentioned earlier. None of the various arrangements however, many can completely eliminate tracking and provide full coverage in a single track with a single steel. The object of the present invention is to achieve a drill bit for ground drilling with cutting steel with drill bits distributed over the cutting steel surface, so that only one cutting steel can be used in a particular track, and accomplishing more efficient rock decomposition and balanced wear of the cutting elements.

Another purpose is to avoid tracking and eliminate the formation of annular ridges, even under eccentric driving.

This is achieved with the cutter proposed according to the invention. the device mainly of a plurality of posts or drill bits that are attached to holes in the cutting sleeve, wherein each of the drill bits has a surrounding boundary zone with the minimum and maximum desired distance between the the lines for each two drill bits, and that a selected area of the cutting sleeve has a drill bit pattern, in which substantially all drill bits are distributed within the boundary zones with different distances from each other and with different distances from one cutting edge, so that rows of drill bits are eliminated.

To provide sufficient strength of the metal which supports the drill cuttings, a minimum stand around each drill bit as a limiting factor for drill bit gaps. To achieve a collaboration between 448 G15 adjacent impressions on the bottom of the borehole, are thus established a maximum distance around each drill bit. The maximum the stand is a function of the rock's properties and drilling the size of the insert.

The method preferred for the location of the drill bit is known. is drawn by the fact that the drill bits or inserts are distributed over the whole selected area, said distribution comprising takes, that for each drill bit or insert, which shall located in the selected area, a surrounding boundary is defined zone, which has an inner radius corresponding to the least desired the distance between the drill bits, and an outer radius, corresponding the maximum desired distance between the drill bits, that the position of a first drill bit is arbitrarily selected, that the position of a second drill bit is randomly selected within it the boundary zone of the first drill bit, that thereafter the position of a third drill bit is randomly selected within the second drill bit. the boundary zone of the insert and outside the minimum distance, which surrounds the first drill bit, after which it is randomly selected positions for each subsequent drill bit within the boundary zone for the previous drill bit and outside the smallest the distance from the previous drill bit.

The invention is described in more detail below in connection with attached drawings, on which Fig. 1 is a partially sectioned front view of a drill assembly. holders for risers, with drill cutters in accordance with the present invention, wherein shows with shadow lines how it is rotated transversely the sectional plane to illustrate the relative divide the positions, Fig. 2 is a schematic illustration of the drill bit location the rings of one of the intermediate cutting steels according to Fig. 1, Fig. 3 is a graph showing the drill bit density of a 448 015 of the intermediate drill steels according to Fig. 1, Fig. 4 is a cross-sectional view of a sleeve for one of them intermediate cutting steel according to Fig. 1, Fig. 5 is a schematic view of a method of placing the drill the inserts 1 in accordance with the present invention, Fig. 6 is a cross-sectional view of a sleeve for one of the re cutting steels, Fig. 7 is a schematic view of one of the rows of drills cut from the inner cutting steels according to Fig. 1, and Fig. 8 is a schematic view of the two rows of drills cut into one of the inner cutting steels according to Fig. 1.

Fig. 1 shows a reaming drill bit or reamer 11, while drilling a shaft 13, pulled upwards through a previously drilled guide hole 15. The reamer ll takes a support part or plate 17 for the cutting steel, sat at right angles to a cylindrical rod 19. The rod 19 is attached to a drill pipe (not shown) and has one longitudinal or axis of rotation which is concentric with that for the plate 17.

A plurality of cutting steel devices 21 are arranged on the plate. tan 17 through holder 23. Each cutting steel holder 23 has two arms 25 separated from each other and directed away from the support plate 17. The arms 25 form a saddle or cradle for receiving the cutting device 21.

The cutting devices 21 comprise an inner cutting steel 27, a 448 015 a plurality of intermediate cutting steels 29 and a plurality of outer ones or guide cutting steels 31. The inner cutting steels 27 and the outer ones the cutting steels 31 are preferably identical. Also it the cutting structure of the inner cutting steels 27 and the the outer cutting steel 31 is in the preferred embodiment the shape is smaller than the width of the cutting structure of the intermediate cutting steels 29.

Each cutting steel device 21 comprises a sleeve arranged in a warehouse, as shown in U.S. Pat 043 533. The sleeve 33 for the intermediate cutting steels 29 is shown in cross section in Fig. 4. Each cutting steel sleeve 33 is usually conical and truncated perpendicular to the shaft 35 to form a frustoconical outer surface which is in roller contact with the ground. Inside 37 of the sleeve 33 is closer to the rod 19 (Fig. 1) and is smaller than the outer diameter of the outer side 39.

Each sleeve 33 has a tip area, an intermediate area and an outer area. The tip area 41 is annular truncated conical surface formed at the inside 37 edge. Tip- the surface of the area 41 forms an angle of 54 ° in relation to the shaft 35. The outer region 43 is a truncated conical surface formed at the edge of the outer surface 39. The surface of the outer or the control area 43 forms an angle of 600 with the shaft 35.

The intermediate area 45 comprises, next to the control area 43, a ring shaped section 45a, which is cylindrical and parallel to the shaft 35. A frustoconical surface 45b connects to the surface 45a and forms an angle of 7.50 with respect to the axis 35 in the preferred embodiment. Another mutilated conical surface 45c between the surface 45b and the tip area 41 forms an angle of 12.50 relative to the axis 35.

The peak and control areas are defined here as ¿\ 448 015 surfaces immediately adjacent to the inside the outside, which are separated by an intermediate and which form considerably larger angles with rotational axis compared to the intermediate range.

The intermediate area 45 comprises a plurality of holes 47 (of which only one is shown) drilled perpendicular to its surface for containing hard metal inserts 49 (Fig. 1), mainly made of sintered tungsten carbide. In it preferred embodiment of the intermediate cutting steel 29, is no inserts or inserts arranged in the tip area 41 or the edge area43. The bottom hole pattern for drill cuttings Fig. 47 is shown schematically in Fig. 2, which represents the appearance of the bottom of the boreholes if a cutting steel is rolled one lap. The left side of the drawing according to Fig. 2 presents the inside of the intermediate area 45 in the intersection between the surface 45c with the tip area 41. Right side on the drawing in Fig. 2 represents the outside of the intermediate area it 45 at the intersection of the surface 45a and the guide area 43.

The drill bits or inserts in the intermediate area 45 are distributed placed or irregularly placed within the limits of border zones, to avoid the creation of peripheral lines. Each hole 47 in the intermediate region 45 has a boundary zone, which surrounds the drill bit. The boundary zone for a first selected hole 47 'is shown schematically with dashed lines in Fig. 5 and consists of a first ring 53, corresponding to the smallest desired distance between the centerlines of the drill bits and a second ring 55 corresponding to the maximum desired distance the position between the centerlines of the drill bits. According to it preferred method and the device constitutes the rings 53, 55 concentric circles and are identical for each hole 47 for drill cuttings, which are arranged in the loan area 45. 448 015 The minimum distance is determined empirically and depends on how much of the metal of the cutting steel sleeve is needed for to hold the drill bit or insert. The maximum the distance is determined by the extent to which a typical soil formation is affected by a single drill bit. These the minimum and maximum distances between the center lines also on the circumference of the cutting steel, the shape of the drill bit and size and of how much the drill bit protrudes from the cutting steel sleeve. In the preferred embodiment, for a cutting steel diameter of 34.279 cm at the inside of intermediate area 45c, a diameter of 39.471 cm at intermediate surface 45a, a diameter of the hole 47 of 1.5875 cm and a depth for the hole 47 of 1,270 cm, the minimum the position between the center lines of the drill bits to 2,064 cm.

Thus, the radius of the ring 53 is 2,064 cm. The maximum the distance between the center lines of the drill bits is 3,483 cm for this cutting steel. Thus, the radius of the ring is 55 3,483 cm.

In the preferred method of selecting the position of the drill bit selection, the location of the first hole 47 'is approved. apparently at some point in the intermediate area 45. Thereafter select the location of a second hole 47 "center line, see Fig. 5, arbitrarily within the boundary zone rings 53 and 55 for the first hole 47 ', e.g. using a standard random number generator. The term "arbitrary" refers to to an irregular choice which does not show any particular different pattern within the specified boundary zones.

Boundary zone rings 53 'and 55' are then laid around the center the line on the second drill bit 47 ", as indicated by dashed lines in Fig. 5. The center line of a third hole 47 "'is arbitrarily placed within the boundary zone thereof second hole 47 ". However, the third hole 47" ' not placed closer to the first drill bit hole 47 ' _x 448 015 than the desired minimum distance between the drill bits. The- of the boundary zone of the second hole 47 ”, which is located too close to the first hole 47 'is indicated by it dashed area. This procedure is performed for each subsequent drill bit placement, which is arbitrarily well within the boundary zone of the preceding drill bit, but no closer to any previously selected location for one drill bit, than the desired minimum distance between the inserts. The procedure is repeated until the intermediate range is fully covered. Depending on space constraints for the intermediate area, there will be some spaces which is greater than the desired maximum distance from drill bits, but which still offer insufficient space me for placement of another drill bit without this ends up too close to a previously placed drill notch. The minimum distance requirement must always be observed.

The selection process can be performed manually or with a computer.

In computer use, a random number generator was used selection of locations within the boundary zone restrictions.

Purely mathematically, the program is not random, ef- as in a purely random selection of repetitions occurs. The random number generator used in the pro- the program will generate approximately 50,000 numbers before a speech is repeated. This is sometimes called pseudo- random selection. The computer program in Fortran language is attached in end of description. The program adopted intermediate council 45 be a conical surface with a single angle in instead of having multiple angles in the sections 45a, 45b and 45c.

When choosing locations, some of the drill bits must 49 end up near the edge of the intermediate area 45. This can as long as the cylindrical surface in the hole 47 is not allowed 448 015 is closer than about 0.0396 cm from one edge in the intermediate area 45. About the border zone of a former placed drill bit falls over an edge of the intermediate area 45, only that part of the boundary zone may be used for of a drill bit located within the intermediate area.

The result is a cutting steel with an intermediate area 45, in which rows are deliberately avoided. Preferably is the spaces are so distributed that there are none groups on three adjacent drill bits, where a single plane can be laid through the points, where their centerlines cut the cutting steel surface. Although it is possible that one or several groups appear in the preferred method, however, it is believed to be very rare. Fig. 3 is a graph, which indicates the approximate uniformity in the coverage of the cutting steel. This graph has provided mits by starting at the tip area 41 and inserting it relative drill bit density as one continues utâtm@t.kantområdet 43. The relative density centers the approximate total linear distance between drill bits, through which a selected plane passes, divided by the associated periphery of the cutting sleeve at the selected plane. The selected plane must be angular right against the shaft 35 on the cutting sleeve 33. Take e.g. a plane, passing through the intermediate region 45 to about 12.5 mm from the tip area 41 and perpendicular to the axis 35, which ket would pass through a number of drill bits 49. The plane can pass through and split some drill bits, but passes through only one segment on other drill bits. The stretch The plane cuts through each drill bit at a point in level with the cutting sleeve 33, is added. After summation of these sections and division with associated circumference obtained about 0.28 at a point 1.274 cm from the tip area 41. If the drill bits were arranged in a peripheral real line at this point and no metal was present 448 015 ll between, the relative density would be 1.0 or 100%.

It should be noted that the coverage is relatively uniform, with after the first six to seven millimeters to both edges of the intermediate region 45 vary in density between about 0.15 and 0.28, and preferably drops not below 0.10. This suggests that all conceivable plans, passing perpendicularly through the shaft 35, will pass sera through a portion of at least one drill bit. About peri- available lines, the graph of Fig. 3 would register zero between the lines, because the plane at these points would not pass through any drill bits at all.

In the attached Table 1, the exact position of each je drill bits 49 in the holes 47 in the intermediate area 45 are listed for an insert with the dimensions given above. The one with "A" marked column represents the distance along the axis from the outside 39 to the point where the drill bit is located. the angle. N. is a radial measure of the sleeve 33 about its axis 35, which begins at an arbitrary first point. The difference between some of the angles GL is proportional to the peripheral distance according to the estimate intermediate space 45 in a plane perpendicular to the axis 35. Although not necessary according to the invention, it should be noted that with three decimal places, each drill cutting hole 47 located at a distance from the outside 39 which differs from all other drill bits. So is each hole 47 on the third decimal place located on a radius dialplan that differs from all other drill bit shafts.

The positions of the drill bits were not selected by the computer in the order shown in the table. I.e. the other the mode selected by the computer does not correspond to the 448 015 12 the position of drill bit No. 2 in the table. Drill cutters No. 3 in the table is not within the limit zone for cut No. 2 in the table. Instead, the table for for the sake of convenience, the drill cuttings are listed after increasing kel OC. The drill cutters nos. 292 - 294 are indicated in Fig. 3 for to correlate Fig. 3 with the table. All drill bits 47 are drilled perpendicular to the surface on which they are placed except for holes that fall over the cut for intermediate space 45a with intermediate space 45b and cutting the intermediate space 45b with the intermediate space 45c.

With these holes, the hole is drilled perpendicular to the surface, which encloses more than half of the diameter of the hole.

Fig. 6 shows a cross-sectional view of an inner insert 27 or an edge insert 31 (Fig. 1), which inserts are identical to each other, but differ significantly from the intermediate cuttings 29. One reason is that the edge insert 31 requires an extra pile density with respect to drill bits on its outer edge for degradation of the side wall of the shaft 13. Furthermore, the insert 23 a series of drill bits on its tip area for breaking down the edge of the guide hole 15. To be able to exchanged with each other are the inner insert 27 and the edge insert 31 produced identical, with rows of drill bits arranged both in the tip area and near the heel area.

The inner insert 27 or the edge insert 31 comprises a cutting insert. sleeve 53, which is usually conical and truncated perpendicularly against its axis of rotation 54. The bearings for the cutting sleeve 53 has the same construction as used for the intermediate inserts 29.

The cutting sleeve 53 has an inside 55, which is located closer the rod 19 (Fig. 1) than its outside 57. Each cutting sleeve 53 has a tip area, an intermediate area and an edge area. area, as mentioned earlier in connection with the the inserts 29. The tip area 59 consists of an annular 448 015 13 truncated conical surface formed at the edge on the inside 55 i an angle of 35 ° with respect to the axis 54. council 61 consists of an annular frustoconical surface, formed at the edge of the outside 57 at an angle of 600 ° relative to the shaft 54. The intermediate region 63 includes takes an annular section 63a adjacent the edge area 61, forming an angle of 50 with the axis 54. A truncated conical surface 63b connects to the surface 63a and forms a angle of 7.50 with the shaft 54. Another truncated conical surface 63c between the tip region 59 and the surface 63b forms a angle of 20 ° with the axis 54.

The tip area 59 contains a series of holes 65 drilled and cleared for drill bits 49 (Fig. 1). Line 65 contains thirty-seven holes, all at the same distance from the outside 54.

The division is defined here as the distance between the the line for the drill bits at the surface of the sleeve 53. The division varied in line 65 to avoid tracing in accordance with in accordance with what is taught in U.S. patent application no 043 533. Referring to Fig. 7, row 65 is divided into groups with increased division, marked with "I" and with decreasing division, marked with "D", in ning moturs. The division is gradually increasing in the increasing and gradually decreases in the declining groups.

The drill bits marked with an asterisk fill the space met between the last drill bit in the last group in row 65 and the first drill bit in the first group.

The size of the increase in division, the decrease in division and the number in each group is selected according to a plurality criteria. First of all, the minimum sub- through the necessary cutting sleeve metal which is razor to hold the drill bit in place. The maximum the size of the division is determined by the extent 448 015 14 a typical soil formation is affected by a single drill bit.

This is larger than the diameter of the drill bit 49 and also the circumference of the cutting sleeve 53, and the size on, the shape of and how much the drill bits protrude from the outside of the cutting sleeve.

The number of drill bits within the group depends on the desired the change from drill bit to drill bit. To obtain a significant difference between the division from a drilling inserts to its adjacent drill inserts, were normally used groups of from about three to seven drill bits. In order to calculate the exact position, divide the number of spaces between the drill bits in the group minus one with the total the increase in division. This constant number is distributed to each space between the drill bits in the group. Thus, more in an increasing group each space between the drill bits center line to be the same as the previous the space in the group plus the constant number. In an agreement group, each space between the center lines will to be the same as the previous space minus the constant number. Preferably the same is used maximum and minimum for each group within a row.

Still referring to Fig. 7, row 65 has nine drill bit groups, five increasing and four decreasing.

Two increasing groups are followed by two decreasing groups pektive. Each group contains five drill bits, which provides four spaces between drill bits in each group for varying division. Furthermore, when an increasing group is followed by a declining group, the groups overlap pair with the last space of the growing group like that first space in the declining group.

Fig. 7 indicates the relative angular positions of the drill bits 448 015 in row 65, as indicated in Table No. 2, as follows hereafter. The cutting sleeve 53 (Fig. 6) uses the same size play on the drill bit 49 (fig. 4) as the cutting sleeve 33 (fig. 4). However, it has other dimensions, and closer determined 13,970 cm from inside 55 to outside 57, 36.626 cm in diameter at the inner edge of the edge area 61 and 36.225 cm in diameter at the outer edge of the tip circumference council 59. The angle M. in Fig. 7 begins at zero with ver-. the shaft 67. The drill bit holder 65 ', which is located on shaft 67, is indicated in this table as drill bit No. 2, and where all the drill cuttings in row 65 for this particular cutting size is 13,256 cm from the outside S7, shown in the "A" column. Next drill bit hole 65 ”in the row 65 is drill bit no. 7 in table no. 2, placed 8,560 ° from the center line of the first drill bit hole 65 "and from shaft 67. The third drill bit hole 65 "'is a drill bit No. 13 in Table 2, located 17.94 ° from the axis 67 or 9.43O0 from the center line of the drill bit 65 ".

The gradual increase and decrease in division and drill bit locations can be determined by Table No. 2 In this way. The other numbers listed in the table No. 2 indicates the positions of other drill bits on the cutting sleeve 53, and discussed below. Again, with reference to Fig. 6, a slider is provided. gonally offset row 69 with drill bits in the intermediate area section tion 63b, near the transition to the intermediate section 63a. Fig. 8 is a view similar to that of Fig. 7, which describes the the positions of rows 69 and 71. All drill cuttings center- the lines in row 69 are located 4,760 cm from the outside 57, while all center lines 4,015 for the drill bits in row 71 are located cm from the outside 57. The center áo 448 015 16 the lines are thus 0.744 cm apart, measured along the shaft 54. Because the diameter of the holes for these drill bits is 1,587 cm, there will be an overlap covering approximately half of the drill bit diameter. To ensure a certain overlap can the axial distance between the centerlines of the drill bits in rows 69 and 71 do not exceed the diameter of the drill bit. meter.

The eighteen drill bits in row 69 are divided into three groups. per with six drill bits each. Each group in row 69 is a group with decreasing division, seen counterclockwise. The situation for these drill bits is selected in accordance with what went above in connection with line 65 and as shown of Table 2. Each group in row 69 alternates and is peripherally separated from row 71gemm \ a group of drill bits.

The first drill bit hole 69 ' drill bit no. 38 in table no. 2 and is placed 54,290 ° in row 69 is listed as from the axis 73, which is the same axis as the axis 67. the second drill bit hole 69 "is listed as drill bit No. 46 and is located s3.43b ° from the axis 73.

The twenty-one drill bits in row 71 are divided into four groups, of which three have five drill bits and one has six drill bits. The groups in row 71 have a uniform division between lan drill bits. The first drill bit hole 71 'in row 71 listed in table no. 2 as drill bit no. 5, and located 4.94 ° from the shaft 73. the second bar core core was 71 "1 row 71 is listed in table no. 2 as drill bit no. 12, the position 14,810 ° from the axis 73. Again, with reference to Fig. 6, is a fourth row 75 with drill bit located in the intermediate section 63a.

The center lines of all drill cuttings in row 75 are 448 015 17 lie 2,578 cm from the outside 57. In row 75 there is forty drill holes and they are divided into three increments groups of seven drill bits at each or six intervals between the drill bits. The division for these groups is calculated in accordance with what appeared in connection with the line 65. The drill bits are uniformly distributed between them three groups. The exact positions are shown in Table 2, all drill cuttings in row 75 being found in the "A" slot under the distance 2,578 cm.

It should be noted that for a drill bit with 1,587 cm diameter, the coverage of the heel row 75 overlaps with the drill bits in the diagonally offset row 71 because these are only located 1.437 cm axially apart.

To enable this overlap, each drill bit is in row 71 arranged between two drill bits in the heel row 75. The overlap prevents build-up between row 75 'O and line 71..

As can be seen from Fig. 6, an edge row 77 with edge drills is inserts located in the edge area 61. The edge drill bit (as not shown), differs from the drill bits 79 (Fig. 1) in that they have flat top surfaces. The edge drill bits are arranged with their top surfaces edge to edge with the edge area 61. Preferably, thirty-nine uniformly present split drill bits in row 77, and these drill bits are not listed in Table 2.

According to Fig. 6, a plurality of holes are 79, of which only one is shown, divided into sections 63b of the intermediate area and 63c. The locations of holes 79 are selected in the area between the tip area 59 and the boundary zones of the rows 69 and 71. Hole 79 is selected within the same maximum and minimum boundaries of the boundary zone discussed in connection '10 448 015 18 to the intermediate insert 29. The same computer program as specified previously used for the selection of the 79 locations of the holes, with different numbers used for the dimensions of intermediate the. The positions of all the randomly selected drill bits in the cutting sleeve 53 is shown in Table 2.

The numerical differences between the computer programs for the sleeve 33 and the edge or inner cutting sleeve 53 are only in lines 00620, 00630, 00640, 00650. are as follows: Lin'e sleeve 33 sleeve 53 00620 7,074 7,473 00620 8,020 8,024 00620 395 274 00630 169 96 00630 0 21 00640 0 21 00640 9.893 11.0 00650 5,506 2,894 00650 6,561 4,498 00650 0 '18 Furthermore, the lines 0066OC - O0720C do not have "C" included in its name. _ Depending on the irregular boundary line between the rows 69 and 71, there is no peripheral space between the rows 69 and 71 and the distributed holes 79. This means that each plane passing perpendicular to the axis 54 in the intermediate area 63 necessarily cuts through a part of at least one drill bit. Since the diagonal shot lines 69 and 71 prevent any peripheral space arises between these rows and the heel row 75, 448 015 19 there is no space in the intermediate area 63 through which a perpendicularly laid plane can pass without hitting part of at least one drill bit. A peripheral space exists in the tip area 59, within the tip line 65. The relative density of drill cuttings across the cuttings the sleeve 53 is relatively uniform, and sinks preferentially not less than 0,10, as previously indicated in to the cutting sleeve 33.

In operation, the rod 19 (Fig. 1) is rotated clockwise and pressed up. This causes the cutting devices 21 to rotate. ra, thereby creating an annular path around the borehole surface 51. The drill cutters 49 break up the ground and generate shaft 13.

The invention has considerable advantages. In the drill holes intermediate part between the edge and inner inserts, only required an insert to cover an annular section of drilling the surface of the hole, since the locations of the drill bits are not allows the construction of ridges, which otherwise occur according to prior art between the lines. Without the need for overlapping or diagonally offset inserts, one may greater pressure is exerted through the drill bits, as provides a small number of inserts for the transmission of on which the drill bit is applied. A smaller number of inserts reduces the maintenance required for shaft drilling.

The shaft surface is evenly covered, which provides an efficient maintenance and avoidance of uncut bottom dependent on eccentric operating conditions. Since the overlap the inserts are not required in the intermediate part, between cuts.

The combination of the distributed pattern with rows of drill bits with varying pitch for edge and inner cutting 448 015 clean, evenly covers the surface of the borehole. The rows accomplish higher cutting density for the guide hole and the side walls in the borehole. The varying division in these rows eliminates tracking. . Although the invention has only been shown in one of its only forms, it is not limited to this but can modified and altered to a large extent without one therefore ends up outside its framework. 448 015 _21 _ Eïålíhi Insert No. __ ° (___ _________ § ___ ___ 1 _ 1,727 15,935 2,987 13,324 3 2,568 5,219 4 6,542. 8,181 8,099 10,137 6 8,254 3,596 7 8,261 5,930 8 10,850 14,389 9 11.505 - 12.288 12,788 16,311 ll 13,931 7,104 12 14,310 9,202 13 14,507 4,904 14 16,892 13,522 17,411 2,961 16 19,184 15,974 17 19,422 11,623 18 22,170 7,274. 19 22,964 4,338 25,827 10,033 21 25,870 14,952 22 29,928. 8,171 23 30.198 12.715 24 30,652 6,126 32,184 3,698 26 32,245 16,319 27 32,505 10,441 28 35,900 7,073 29 35,982 14,251 37,475 9,227 31 37,591 4,696 32 38,839 2,722 33 39.066 11.201 34 41,853 7,119 42,694 15,740 36 43,273 13,289 4118 Û'l5 Insert §9¿ 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 _22- 08 46,443 47,350 46,639 50,406 51,165 51,707 53,379 54,072 54,759 56,250 56,974 59,969 60,701 61,669 62,026 62,996 63,630 67,607 69,053 69,564 70,115 71,737 75,719 76,024 76,074 77,241 77,490 60,430 60,569 61,065 61,253 62,046 64,761 67,510 67,637 67,691 69,070 A 4,142 9,814 th most common 14,353 16,375 7,282 2,786 12,819 th most common 4,716 9,959 .354 11,686 th most common 3,395 7,254 13,985 th most common 16,375 .285 9,662 3,271 8,554 .206 11,943 .323 3,642 th most common .568 14,732 7,200 12,771 th most common 16,416 th most common .402 2,700 8,750 11,249 14,503 3,528 12,415 th most common 6,418 th most common .457 lnsert No. 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 ' 91 see 99 1oo 101 102 los 104 los 196 107 los 109 no 04 90,031 92,552 92,935 93,014 95,556 95,956 96,207 99,536 99,764 101,904 102,276 103,432 104,270 108,129 108,255 108,354 111,146 112,865 113,454 114,497 'l16.327 116,353 117,798 118,022 121,284 121,914 122,057 123,157 125,587 126,509 128,166 128,441 131,087 131,150 133,733 134,106 134,464 448 015 A 8,315 .986 2,644 13,627 th most common .064 11,242 7,421 .996 13,693 th most common 3,025 .179 9,034 11,653 7,678 4,320 14,820 .078 12,763 16,316 7,617 th most common .600 3,563 .797 14,396 8,775 12,435 th most common 3,266 16,324 .803 .345 14,787 3,716 th most common 8,082 11,686 th most common 16,286 2,867 14,168 4118 Û'ï5 _24- 1nsert_N0. 0§ "___ A 111 ___ 135,683 5,626 112 136,234 9,525 113 1138_749 11.432 114 139,945 7,904 115 141,179 4,112 116 142,368 13,594 117 _ 142.952 '16.311 118 144,681 9,941 119 145,362 5,605 120 148.462 3.411 121 148,494 7,960 122 150,796 14,726 123 151,596 11,628 124 151,855 6,235 125,154,560 9,573 126 154,592 3,436 127 157,488 15,506 128 157,848 7,833 129 158,066 12,352 130 160,213 4,714 131 160,267 2,682 132 160,727 10,060 133 164.258 '14.810 134 164,671 12,047 135 166,019 3,782 136 166,092 7,147 137 168,348 9,758 138 170,730 13,197 139 173,285 5,615 140 173.546 8.328 141 173,921 15,631 142 174,762 10,894 143 175,558 3,279 144 177,134 10,030 145 179,328 6,106 146 179,995 _ 13,362 147 180,189 9,006 122193332: 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 '184 _ 25- d. 181,236 184,588 184,897 185,716 186,530 187,729 189,803 192,064 192.265 * 192,375 195,765 195,831 196,134 198,569 199,155 199,713 202,621 204,354 204,759 207,027 207.179 ' 208,168 208,272 211,294 213,234 213,906 213,940 213,951 216,771 219.103 219.308 219,491 220,618 221,733 225,322 225,483 226,004 448 015 .____. ê ___ 2,661 11,379 Å 4.234 14,137 16,228 7,114 9,743 12,987 th most common 4,968 2,824 th most common .219 8,399 11,341 13,301 4,785 th most common 6,781 .772 4,617 th most common 16,192 8,945 13,119 6,677 2,750 .476 7,934 13,129 .129 4,224 6,283 2,669 11,498 14,742 9,057 .016 13,116 .934 6,951 4118 0'l5 Inscrt_No. 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 2oo 201 202 2o3 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 " 222 26 - 04 227,341 228,960 229,899 230,958 232,054 233,387 233,723 236,159 236,676 237,128 237,445 240,825 241,210 241,675 243,043 243,697 244,822 247,220 248,494 249,469 249,479 251,746 254,069 254,674 255,042 256,558 256,908 259,212 259,408 _2so.7ee 261,405 261,839 265,013 266,455 266,463 268,040 .268,523 269.123 A .506 3,769 9,522 th most common 12,181 7,228 .270 .092 .421 2,725 8,371 13,088 6,403 16,352 3,876 14,170 8,219 11,229 .308 .369 9,469 13,352 2,865 th most common 7,513 .828 .603 .052 13,540 th most common 8,653 3,065 6,591 .102 11,051 4,371 7,338 13,512 .458 2,778 9,136 448 015 :IN _ 27 _ lïgrt No. 04 A 223 270,621 5,476 224 271,034 11,597 225 275.107 2.915 226 275,665 7,658 227 277,826 12,832 228 277,847 15,359 229 279.129 5.288 230 279,492 9,735 231 281,728 2,809 232 283,924 8,204 233 284.282 16.156 234 286,831 13,964 235 286.908 11.183 236 288,504 5,227 237 291,300 2,788 238 291,889 7,528 239 292.522 15.214 240 294,047 13,233 241 294,542 5,656 242 295,964 9,560 243 298,867 2,997 244 300,366 12,247 245 300,779 14,495 246 301,780 6,911 247,303,590 4,711 248 303,609 9,446 249 305,979 2,799 250 307.224 16.266 251 308,434 14,279 252 308,552 7,947 253 308,800 11,211 254 309,961 5,770 255,312,821 4,015 256 315.905 9.913 257 316,163 7,818 258 317,068 13,136 259 317,126 15,575 260 318.283 5.267 448 015 Insert No. .__________ 261 262 263 - 264 265 266 267 _268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 _ 28 _ (X 318,994 322,344 323,195 324,405 325,035 327,417 327,625 329,556 329,768 331,292 331,871 333,889 335,236 335,820 336,249 337,643 »338.63s 339,228 341,522 341,697 344,643 346,415 346,658 347,334 347,693 348,638 351,194 353,546 353,593 354,036 354,275 357,772 358,809 359,549 A 3,042 6,819 th most common .424 4,008 16,014 13,393 8,900 2,692 6,248 11,823 th most common 16,146 4,163 8,986 6,781 14,467 11,633 th most common 16,349 3,327 8,417 th most common 6,217 .218 12,951 3,959 .433 6,098 8,272 .713 6,713 12,954 .140 4,198 8,623 11,460 th most common 2,745 00120 00130 00140 00150 00160 00170 00180 00190 00200 00210 00220 00230 00240 00250 00260 00270 00280 00290 00300 00310 00320 '00330 003å0 00350 00360 00370 00380 00390 00400 00510 00420 00430 OUAO 00450 00660 00470 00480 00490 00500 00510 00520 00530 00540 00550 00560 00570 00580 00590 00600 00610 1 00620 00630 00640 00650 00660 00670 nn oncnoocnonnnnnonnonnnnnannannannnononooonnoonoonnoo 448 015 -2Q- ÉÄLÜ ___. ”UJÉR_Ä'JQGBA * É INPUI ''10 THE PROGRAM ARE (IN CDNSIÉHÉNI' UN1'lS): mamma oonu moms AT m oF coMP / xcr RZ OUIER (DNE RADIUS AT TIP OF COMPALT lKIMLYf-FIAX. NUMBER OF CÜMPACIS INCLUDING PRlilflXl-ID UJMPACYS Noowmm. Mmmm o? ccrumcæ mcmunnwc rRsFnmo oa-wAcxs o-mx-årmxn-nn fl coz-fmcr sv / xcmc m m -m xx-xnwmïwnzum co-umow svncxnc m 'm m bbhll OF šlilš OF PRHFIXED CCHPACTS ON INNER AND OUYER RIM ONLY D-'LIXWACF DIN-IETIIR nooz-umcr nanm _ »Sxzßo-s-rmfrnqc" srzßo "mn xmmxx ~ 1 Nunlaßu mn-: RAT1 om NCP-'NLIMISISR OF PREFIXHIlJ C-OPIIHÄCTS ON Tl fl l fl ßlš RFN NC2 = NUl ~ ¶ålšR OF PlåíilflXliD (XI-IPACIS ON OUIER RIM 'IHEIYFCDIE ANGLE IN LWIGIUEES (NOT IPKTLIJDFID) 1 = 1,1o1>: = 3.1.41s927,6.2831854 WIIIHFGJNE IJÉNGIH AIDNG GENERATCJR LINE .FIRST 'JO IAST CCNPACI' REM TOMH.D = (I) I \ IE IJNCIH AYONC CENER WALL LINE FIRST RUN TO PACKFACE fonmuwoxnfß oxf Perfume: mr-umows om mm: mo cum now m omm sam-uno wrm 11mm rm HEIA (I) = AI \ XÉIES OF ADDITIONAL PREFIXED COMFACIS 'LN DIISRISEÉS IUSETAU.) = RADIAL POSITION OF COMPACIS AT THF. TIP FIPURE-'PIUFUšL-Ilš OF ADDTFIONAL PREFDED COMPALTS $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$ IF NO RCNS OF CGIPACIS ARE PREFIXED, THE PROGRAM MAKFJS A RANIDM SEIECTION OF THE FIRST (KMPACT. THE RANDCN IMQSERS ARE GENERATTID BY 'mn usla o1 = -nLa r-nnznrucnnva LïmmR oouczrzmmm ML-mon; u (n + 1) = 1 ~ 1u \ cr1r> r »x / \ L-vmr o? 997 == - u. uu) 1s ammo sann. ms PROGRAM ASSUMES .5284163 AS SEED (AUHKXK¶ {C fl HER APPROPRIATE SEEDS MAY BE USED). 'IIIE PERIOD OF THE. GENERATCJR USING THIS SEED HAS A Lš3KI fi {OF 500,000 NUMERS. 1HIS IS USING 10 DIGITS GAIIIUIATIONS. 'IHE POST SIGNIFICÅNI' DIGITS CIHE IEFI 'HAND DIGITS) ARE THE POST RANUOM DIGITS.

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ '$$$$$$$$$$$$ $$$$$$$$$$$$$$$ OUTPUT FROM THE PROGRAM ARE: N = CDï ~ 1PALT (XJUNIER maomwmomx. oommcr Posmoxø m- uu-z m AL.P1 {A (N) = ANG1H, AR CUMY ^ ACT POSITION IN DEGREES oxsrowozsrmqow: emma ov cmzßnna nom 'ro: mm / sea m) .xomoowvxcr cxxmouwxwns von woman $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$ THIS PROGRIX ON A150 (TALEIILATTLÉ THE CARBIDE DENSITY ACRDSS 'IHE SURFACE OF THE CONE Slll-ILL AND STORFS 'IHE DNILÅ IN THE SAME DATA SET (PACCAJJAUX) FOR USE BY THE PLUTYING PROGRAM "UNIVPLTCI" 'IO PIDI 'BOFH (JOMPACP IDCATIONS AND CARBIDE DENSITY. --oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo- »Oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo --oo ~ -oo - oo ~ -oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo - oo- oo- mmacn Rnw-sm-rLo-z) nnmsïon usoo) .Aum / wsoo), mao .nx gasqsoo), Yc (soo> onnansxow xmsoo) yoosoo) mama) ßzrmoo) Jzßsrmoo) if. mJzz fl cwxx, No1m_mz \ x_m1w, N, o, u, rsßao / 7.o74, s.o2o, 39s, 169 1.sso, o.soo, o, .e2s, .75o, .52a41a3 / DATA Nc1, Nc2,1usm, x> 1,1oP1 /o,o,9,893,3.141s927.e.2s31ss4/ if. »Rmmmnwlmom / ziaz., Z..9s, 1 / s.sos, e.se1, o / om.ßßrmszhzs, 631.3,71.84,79.s2, a6./n, 92.e9,1s1.91,161.o5. c1e9.4s, 1'17_11., 1ßa.o9,19o.31, za9.s3.zssßzzßv.os, 271..7e, 2s1.71, 00680 00690 00700 00710 00720 00730 007 & 0 00750 00760 00770 00780 00790 00800 00810 00820 00830 00840 00850 00860 00870 00880 00890 00900 00910 00920 00930 00940 00950 00960 00970 00980 00990 01000 01010 01020 01030 01040 01050 01060 01070 01080 01090 01100 01110 01120 01130 01140 01150 01160 01170 01180 01190 01200 01210 01220 01230 448 015 ÛOOOÖÖOÛOOÖÛÖOÛG 200 FORMAT (////, 14X, 'N' _30- c2s7.93,2s2 * o.no / nAmA RBEIA / 1s * 7.9s7no, 282 * 0.no / nA1A ALPHA / 4.94,14.81,2a.es, 34.s5, aa.a2,1o2.56,112.43,122.30_ c132.17,142.o4,2oo.1s, 21o.o5,219.92,229.79,239.66,297.ao, 307.67, c311.54,327.41,337.2s, 347.1s, 479 .no o.no/ DATA AJPHA / 0.0,7.1a, 15.12,23.93,33.59,4a.oß, s1.22, cs9.2, es.o1,77.67,88.16,97.a2,1o6.63,114.61,121.7s, 132.24,141.9, C150,71,1ss.e9,165.83,172,97,1s0.95,1s9.76,199.42,209.91,217.05, c2s5.o3,233_84,243.5,253.99,263.e5,272.46,2ao.44,287.58,298.07, c307.73,316.s4,324.s2,331.ee, 3ao.a7,3so.13, c2oø.o, 206.22,213.17, c22o.8s, 229.26,23s.4,244.62,251.57,259.25,267.66,276.s, 2ß5.21, c29z.s9, z99.s4,306.os, 315.2,323.61,331.29,33s.24,344.4ß, 35o.6s, c357.63, s.31,13.72,22.86,29.08,36.o3,43.71, s2.12, e1.26,69.67, c77.35, s4.3,9o.52,99.ß6,1oa.07,115.75,122.7,128.92,135.14,142.09, c149.77,1s8.18,167.32,175.o, 1ß3.a1,192.55,412 * o.no / name: H1 / 'R.M.', '1. ',' 6 / os', '/ 79', '3 "', 'cuT', 'TER', '343', c'ou1 ',' Ac1 ',' - No ',' Row ',' s' / wRJ 1E (6, 200) , 16X, 'RHO (N)', 10X, 'A fl JHLA (N)', 10X, 'DIST (N)', c9x, 'Y (N)', 14x. 'X (N) o0N = PI / 180. msm fl ursrzvkoorl zR01 = P1f = Ds1N (1H1-5rA) 111-1-111-. 25 = '= Dcos (1111: 111) + 10w1 mus LNCn fl sTA) Rm-: IND 2 wRrrfxz, 307) zR0r, R1, R2,1> I, 1H1ïr / x, 1> ' 307 PïHGüNf (6F12.7) WRI1E (2,318) 1HI 318 mRMAT (13A4) 1F (N.EQ.o.ANn.MoRß.ßQ.o) co 10 15 ¿11 = (N.EQ.o) co 10 12 no 1 1 = 1, N A11> 1111 (1) = A11> 11A (1) = '= oo1 ~ 1 coNr1NuE mmmmæme Rw1u-.2s fi xIß (uunm) no 5 1 = 1, Nc1 Dx (1) = (RM-Ru) / nmAN (1nßnA) Rno (1) = m CALL Pos (R1, THs1A, cnN, 111111 <1), acid, zßTA, Y (1), xs (1), Yc (1), ANcLE> wR11ß (6.25o) 1, R1, ANc1E, nx <1), Yc (1), xs (1) cx1wr1NuE1 1F (Nc2.ßQ.o) co To 11 6Næm @ mmu Rxwzz-.zs- fi ncoscnmuzfn no 10 1 = NcsuM, N Rnom = 1z2 nM (1) = (RM-RH) / nrANcnmnn> CALL Pos (R2,1uæ1A, coN, ALPHA (1), zRør, zEmA, Y (1), xs (1), Yc (1), ANcLE) wR1TE (6.25o) 1, R2, ANc1E, Dx (1), Yc (1), xs (1) cxxwrznuß 11 1f (mnns.ßq.o) co 10 16 12 no 99 1 = 1, NMoRs 'BEIA (I) = BEI'A (I) * CßN 99 CXXWEINUE 01240- IIN = N + 1 01250 01260 01270 01280 01290 01300 01310 01320 01330 01340 01350 01360 01370 01380 01390 01400 01410 01420 01430 01440 01450 01460 01470 01480 01490 01500 01510 01520 01530 01540 01550 01560 01570 ' 01580 01590 01600 01610 01620 01630 01640 01650 01660 01670 01680 01690 01700 01710 01720 01730 01740 01750 01760 01770 01780 01790 01800 448 015 _31- IF11 \ 1 == NH-1T \ DRE IX) 13 1 = I IN, IFIN A1l'1iA (1) = BEI'A (I-N) RHO (I) = RBEI “A (I-N) Rl {- = RliO (I) -. 25 "'fDCOS (' 1HE1'.A) DX (I) = (RP1-I \ '1 {) / U1'AN (' 1HETA) R = I010 (I) (IALL POS (R, 'FHEFA, CUN, A1.I'HA (I), ZRUF, ZICFA, Y (I), X5 (I), YC (I), ANG1E) \ J} š1'I'E (6,250) I, RHO (I), ANGLE, DX (I), YC (I), XS (I) 13 (IOIITINUE - .WIN M-DRE (XD TO 16 N = 1 RAND = ANY (FSI-LED) FSEEDÅRAND RHO (N) = RAND * (R2-R1) + R1 RH = RHO (N) -. ZSf-'DCIOS ('11 113171) DX (N) = (RM-RH) / DIAN (1UEIA) RAND = ANY (FSE¶ID FSEED fi RAND ALP] 1A (N) = R .- '\ ND -'-' 10PI R = RHO (N) CALL POS (R, _ 'I'HE'I'A, CJ () N, ALPIIA (N),' /. I ' R1TE (6, 250) N, RHO (N), ANGIE, DX (_N), YC (N), XS (N) 16 DAM / FLHAX / Rl KN = O 13 DO 60 Kl = 1, N RAND = ANY (FSEI ID) ADIS% RAI \ 1I1f - '(mAX-lX fl bl fl- íïílN FSEED = RAND KTIME = 50 DO 40 J = 1,100 KTIME = KTïME + 1 IFÜCTDIPLLT. 100) GO '10 20 CALL TIMER (KTIME) ' KITME = 0 DAN = 1.0 _ 1CDUNP = 0 KKK = 0 RAND = MIY (FSEE.D) HRANDWIÛPI F'SEED = RAND IF (AK'1'.LT.P1) G0 '10 21 K1 mmm-AKT 21 s1NE = nsQ1 zum.m.PLORAKLEQ.o.o.oR.A1cr.EQ.ToPI) uAN = 0.0 1F (DAN.EQ.0.o) cø fm 27 ïïnfouyNf-LSINE) G0 To 24 23 EIAFPI-zn-'mr 1 cq m 26 24 Erzsænfuesrmaxnzsrknsznçßaclv / SINE) 26 mnH-: IA / nsmuwzm) ï fl mrmcrmm) co m 40 27 mmsunfrkznsxucnu-: Lw I1 = (Nc1..EQ.o.mvn_Nc2.aQ.o) co'm 30 í fl íüïšf QUALITY _. 32. 38 I \ 7I \ J kD® G0 ~. GO 01830 28 '.LF (RAD.LT. .OR.RAD.GE.R2) GO '10 140 018140 GO '10 31 01850 29 "IF (RAD.LE.R1.0R.RAD.G1'.R2) 00 '10 140 01860 GO '10 31 01870 30 11 '"(RA1) .I.' ['. R1.0R.111 \ D.G1'.R2) GO '10 40 (11880 31 IF (1š1 \ '1 () 32,32,33 01890 32 A11GLIš = ALH1A (K1) -1) AN 01.900 11- '(ANGLE. LE. 0. 0) ANG1 .15 =' 101 ”l-1 ^ 1'X11GLE 01910 (X) '10 34 01920 33 A1 \ 1 (= 'LE = AL1- * HA (K1) -1-DAN 01930 IF (ANGLE. G1 '.' 10PI) ANGLE = A1 \ 1GUE-'10PI 01940 314 1D 35 K2 = 1, N 01950 D1S'I * - 'R0O1' (A1.P11A (K2), .ÅNGLE, Y (X2), S1 N12, PI, '10PI, 11115121) 01960 IF (DIST. LT. ININ) G0 TO 40 01970 IF (DIST.GE. DM1N.AND. DISTLE .1I-'1ÅX) 1 (X) U [\ 11 “= ICDUNI '+ 1 01980 35 0011111015 01990 19011101) co'm 37 02000 36 1F (100u1wr.1n12> co 10 40 02010 37 11 = N + 1 02020 Y 02030 101000-4210: 02000 101401001) -. 2s = ' 02050 0x (N) = (RM-R11) / 01: AN ('n11-sr10 02000 A11 = 11Au0 = _, -. 02070 ZhIT'A = AN (š1..E '-'-' DSIN ('11 ~ 1EIl / \) 02080 XS (N) = S lNEffDS IN (ZEF A- RED) 02090. Yc (N) = s1Nß = '- 1x: os (z1: m-z | <0r) 02100 ANG1¿ = ANc1s - == 180./P1 0211.0 NRITE (6, 250) N, RADJXNGLE, DX (N), YC (N), XS (N) 02120 250101111AT (10x, 1s, 1sx, 1 = 6.3,10x, 1 = s.3,10x, 1 = e.3,10x, 1 = e.3,10x, 19s.3) 02130 00 10 60 02140 40 001011101: 02150 60 00011001: 02160 II-KNIIILNQIÅX) GO '10 70 . () 2170 IF (I ~ I.IE.NCI'IIN) G0 '10 18 02180 ID11É-'F = N-KN 02190 IF (IDIFF.EQ.0) G0 '10 70 02200 KN = N 02210 G0 '10 18 ' 02220 70 WRl'IE (2,327) N 022130 327 FOR1-1A'1 '(I5) 022110 lFN-l 02250 75 DO 76 IS = 1, L 02260 J = IS + 1 02270 IF (ALP11A (IS) .LE.ALH1A (J)) G0 '10 76 02280 A = ALP1 1A (IS) 02290 B = DX (IS) 02300 A1.PHA (IS) = A1_.P1IA (J) - 02310 DX (IS) = DX (J) 02320 ALP11A (J) = A 02330 DX (J) = B 023140 G0 '10 75 02350 75 CONIINUE 02360 '1 ~ IRITE (6, 330) 02370 '330 F011MAT (35 (/), 20X,' N ', l1X,' ALP11A (N) ', 7X,' DIST (N) ') 02380 02390 02400 02410 02420 02430 02440 02450 02460 02470 02480 02490 02500 02510 02520 02530 02540 02550 02560 02570 02580 02590 02600 02610 02620 '02630 02640 02650 02660 02670 02680 02690 02700 02710 02720 02730 02740 02750 02760 02770 02780 02790 02800 02810 02820 02830 02840 02850 ° 02860 02870 02880 02890 02900 02910 02920 02930 02940 ' 448 015 _. 33. no 77 1s¶ = 1, N Au-zmusr fi mzuwlslü / caom manus, 33s) Is'r, A1nm (1s'r>, ux <1s'r> 335 FORMAT (16X, 15; 9X, F8.3,1OX, F6.3) 77 CONTINUE ' DO 80 I = 1, N WRlTE (2,396) XS (I), YC (I) 396 FORHKT (2Fl5.7) 80 CONTINUE \ # 4J11H] iHD + .l N0 = W / .1 WRlTE (2,440) H, ND 440 FORMAT (F15.7, I5) Bl = (Rl ~ .25 * DCOS (THEEA)) / DSIN (¶HETA) -D / 2.

B = B1 IX) 95 JD = 1, ND C¶ll.¶1FER (] 00) SM = 0.0 DO 90 KlF1, N YUP = Y (KL) -. 25 / IJPAIJ ('11 lETA) + D / 2.

YUJAIEYGCL) -. 25 / DTAN ('11 {E1'A) -D / 2.

IF (B.LE.Y1UW.OR.B.GE.YUP) GO TO 90 T * B-Y (Kl) + 25 / DIAN (¶HETA) C = D-2. * DABS (TÜ SUï-FSIJH- * C 90 CONTINUE XD (JD) = B ~ B1 ynon) = (suM / ('101> 1 -' = ß - '= Ds 1N (' n-1ß1'A))) - '= 10.0 ß = ß + .1 mz11a (2.39ß) m0n) nzøuu) cormwuß 'swP m1) FuNcnoN massan) mmcn: RmLf-ßax-xmo-z) RAN = 997. = '= Fs12ED M = RAN Arw m zm-xanzxfaz) Rxrrurm END _ sußRoUnNa Posuz fl xuzrfycormmm, zRcmzßrAALxs, Yc, ANG1.E) IMPLICIT RFALf-'B (A-H, O-Z) Y = R / nsn ~ 1 (m1 ~: rA) zrrrA = Au> HAf = DsIN (1n1 ~: rA) xs = Y - '= ns1N (z1: 1: A-zraor) Ycárf-Doosaßm-zæzør) ANcLz = ALP1WooN REIURN END nmcrïon Rocrr (A1.v11A, ANcLE, Y, sINE, PI, 1oP151mm) : Mmcïr REALf (uA-mo-z) HWJFMHA GLANIFANGLE 11 = 1) oo 'm 10 11 = Pnmmvuzxm-mv: INGIANaGLPI) GIAIWGIANEJOPI UNA = DBS (GLANE-PHAIA) 02950 02960 02970 02980 RFADY 448 015 _34. lm / Fmwvß-nsmclwu-n-A) nooï fi nsqkr (Y = \ ~ '= 2 + s1Na = H «2-2. = *« = æ1Nßf = noos (um)) mmm END TABLE N0.2 NO.

IN l-l Owmd fl ïl fl nb-UJNP ' F ' F ' l-l N F ' hrs) F * .b F * U1 F * G \ HRS' \IN PJ æ F ' kD hrs) O N F-J N N N hrs! N »B N UI N 01 N \ l N ® N \ D hrs) O LA) F ' LJ N UI U) UI reach: hrs) LH OK ° + 0.000 0.000 1,641 th most common 3,523 4,940 th most common 6,505 8,560 9,870 th most common 11,714 th most common 11,727 th most common 13,983 14,810 th most common 17,940 th most common 19,740 th most common 19,827 th most common .261 23,781 24,680 28,031 28.106 28,130 29,610 th most common 32,626 34,550 34,607 39,130 39,303 39,480 39,520 40,567 44,420 46,647 th most common 47,690 47,838 48,943 448 015 Ai o.o3s 2,578 13,256 11,209 9,273 4,015 th most common 7,147 13,256 2,578 .492 6,093 8,425 4,015 th most common 13,256 2,578 .236 6,037 8,227 4,015 th most common .693 6,314 13,256 2,578 8,879 4,015 th most common 6,659 13,256 .138 2,578 11,211 7,536 4,015 th most common 8,856 13,256 .843 6,738 448 '015 - 36 - _ m6. m0; 0.02 Ai 0.038 36 '49.350 2.578 37 54,084 10,276 38 54,290 4,759 39 54,905 7,764 40 55,570 2,578 41 57,070 13,256 42 60,251 6,908 43 _ 61,524 11,196 44 62,520 2,578 45 63,112 9,225 46 63,430. 4,759 47 66,885 7,647 48 ° 67,260 13,256 49 70,200 2,578 50 71,692 9,700 51 71,840 4,759 52 73,313 7,134 53 78,260 13,256 54 78,375 8,204 55 78,610 2,578 56 79,520 4,759 57 80,372 10,477 58 82,533 6,713 59 86,470 4,759 60 87,629 9,357 61 87,750 2,578 62 88,450 13,256 63 90,068 7,124 64 92,690 4,759 65 93,839 11,099 66 94,454 8,915 67 97,620. 2,578 68 97,830 13,256 69 99,950 6,276 70 100,497 10,828 71 '102,560 4,015 NO. 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 _96 97 98 99 100 101 102 103 104 105 106 107 Of: 0. 104,097 106,390 107,490 108,351 112,123 112,430 113,994 117,360 117,390 118,563 119,553 122,300 123,779 126,137 126,669 127,230 127,580 131,116 132,170 133,752 136,696 136,960 137,100 137,424 140,348 141,096 142,040 145,436 145,520 146,970 147,941 149,654 151,839 151,910 153,190 154,080 448 015 Ai 0.038 9,166 13,256 2,578 6,250 .452 4,015 th most common 8,011 2,578 13,256 6,065 .203 4,015 th most common 8,475 th most common .810 .974 2,578 13,256 9,573 th most common 4,015 th most common 7,228 .270 13,256 2,578 11,142 7,058 9,550 4,015 th most common 11,188 13,256 2,578 6,614 9,265 11,173 4,759 2,578 13,256 448 015 NO. 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 of: 158,089 158,699 160,140 161,050 163,460 164,354 166,409 167,820 169,460 169,562 170,255 173,650 174,663 176,230 177,140 178,358 182,874 183. 58 184,090 184,650 185,370 188,493 189,874 190,310 193,210 194,321 195,240 195,863 196,470 200,180 201-345 202,590 203,419 205,110 207,630 210,050 38 * 0.02 A: .297 7,686 2,578 4,759 13,256 9,042 6,896 2,578 4,759 .726 8,519 13,256 7,033 2,578 '4,759 9,491 11,117 6,964 4,759 13,256 2,578 9,786 7,152 4,759 13,256 11,003 2,578 8,455 6,459 4,015 th most common 9,695 13,256 6,949 th most common 2,578 9,235 4,015 th most common 448 015 _ 39 _ uu. “P 1 0.02 A i 0.038 144 210,600 11,140 145 212.780 13.256 146 213,409 6,515 147 214,980 2,578 148 216,632 8,684 149 219,591 10,467 150 219,920 4,015 151 222.127 5.869 152 '223.780 13.256 153 224,850 2,578 154 226,714. 8,717 th most common 155 227,463 11,008 156 227,869 6,289 157 229,790 4,015 158 233,891 6,408 159 233,970 13,256 160 234,720 2,578 161 236,511 9,436 162 239,660 4,015 163 239,818 6,438 164 5 _ 243.279 9.804 165 243,350 13,256 166 244,590 2,578 167 246,465 7,653 168 248,093 11,196 169 249,530 4,759 170 250,810 2,578 171 251,910 13,256 172 252,289 9,362 173 254,857 6,814 174 255.295 '11.191 175 - 257,760 2,578 176 258.377 9.398 177 258,670 4,759 178. 261,421 7,467 179 262,664 11,158 292 448 015 NO. 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 262,910 265,440 267,080 267,480 268,016 273,100 273,850 274,244 274,277 274,760 281,371 281,710 282,480 282,990 283,177 286,821 287,930 290,555 291,040 291,477 292,860 296,741 297,799 297,800 299,600 303,114 302,730 303,543 303,752 307,670 308,371 308,980 312,392 312,600 312,906 316,496 A and 0.038 13,256 2,578 4,759 7,551 9,791 13,256 2,578 9,441 6,794 4,759 .614 4,759 13,256 2,578 7,780 9,517 th most common 4,759 6,972 13,256 .861 2,578 7,081 9,448 th most common 4,015 th most common 13,256 11,127 2,578 .773 8,163 4,015 th most common .106 13,256 .519 2,578 7,538 th most common 9,644 448 015 ._ _ mo. or: 0.02 Ai 0.038 216 ^ 317.540 4.015 217 319,041 7,256 218 319.170 13.256 219 322,470 2,578 220 322,952 10,317 221 324,449 6,113 222 326,388 8,552 223 327,410 4,015 224 330.170 13.256 225 330.372 10.203 226 331.195 6.116 227 6 332,340 2,578 228 332,482 8,105 229 336,164 11,059 230 337,280 4,015 231 338,333 6,786 232 338 730 13.256 233 339,483 8,867 234 342.210 2.578 235 342.237 5.118 236 342.684 10574 237 346,008 6,332 238 346.570 9.001 239 347,150 4,015 240 348.110 13.256 241 349,690 10,939 242 352,080 2,578 243 353,573 4,691 244 355.114 7.645 245 357,263 9,794 246 358,741 6,047

Claims (7)

10 15 20 25 448 015 42 P a t e n t k r a v Cutting device for ground drill bit, comprising a cutting sleeve (33, 53) rotatably arranged on the drill bit, characterized by a plurality of inserts or drill bits (49) which are fixed in holes (47, 79) on the cutting sleeve (33, 53). , each of the drill bits (49) having a surrounding boundary zone with the smallest and largest desired distance between the center lines of each two drill bits (49), and that a selected area of the cutting sleeve (33, 53) has a drill bit pattern, wherein substantially all J drill bits (49) are distributed within the boundary zones with different distances from each other and with different distances from a cutting edge, so that rows of drill bits (49) are eliminated. Cutting device according to claim 1, characterized in that the drill bits (49) in the selected area of the cutting sleeve (33, 53) are distributed so that all the drill bits (49) are found in groups with three adjacent drill bits (49), which are located relative to each other in a distribution that differs from the distribution in substantially all other groups. Cutting device according to claim 1, characterized in that all the drill bits (49) within the selected area of the cutting sleeve (33, S3) are randomly placed within a boundary zone of another drill bit. Cutting device according to claims 1 - 3, characterized in that the cutting sleeve (33, 53) has a tip area (41, S9) on its inner side and an edge area (43, 61) on its outer side, which areas are separated by a intermediate range (45, 63). 10 15 20 25 30 35 448 015 43 Cutting device according to claim 4, characterized in that a first and a second alternately offset hollow row (71, 69) for drill cuttings (49) are arranged in the intermediate area (63), with the second row (69) at a greater distance from the edge area ( 61) than the first row (71), that the drill bits (49) in the first and second alternately offset rows of holes (71, 69) are placed in groups with at least one drill bit (49), the groups in each row (71, 69) are circumferentially separated and alternate so that a group in the second row (69) follows a group in the first row (71), and that said plurality of inserts or holes (49) fixed in holes (79) are located in the intermediate area (63) and is defined on the outside of the first and second alternately offset rows of holes (71, 69) for drill cuttings (49). Cutting device according to claim 4, characterized in that a peripheral heel row (75) with drill bits (49) is arranged in the intermediate area (63) adjacent the edge area (61), that the division between the drill bits (49) varies along the heel row (75). that first and second alternately offset bore rows (71, 69) for drill cutters (49) are arranged in the intermediate area (63) adjacent the drill cutters (49) in the heel row (75) with the second row (69) arranged at a distance from the heel row (75) exceeding the distance between the first row (71) and the heel row (75) by a distance less than the diameter of any of the drill bits (49) in the first and second alternately offset bore rows (71, 69) and that the first and the second alternately offset bore rows (71, 69) for drill cuttings (49) are arranged in groups containing a plurality of drill cuttings (49), the groups in each row being circumferentially separated and alternating, so that a group in the second row (69) follows a group in the first row (71), and that said plurality in holes (79) fixed inserts or inserts (49) are located in the intermediate area (63) and are defined on the outside of the first and the second alternately offset row of holes (71, 69) for inserts (49). Method for placing drill cuttings or inserts in a selected area on a cutting device for a ground drill bit comprising a cutting sleeve rotatably arranged on the drill bit, according to claim 1, characterized in that the drill cutters or inserts are distributed over the entire selected area, said distribution comprising that for each drill bit or insert to be located in the selected area, a surrounding boundary zone is delimited, which has an inner radius corresponding to the smallest desired distance between the drill bits, and an outer radius, corresponding to the maximum desired distance between drills the inserts, that the position of a first drill bit is arbitrarily selected, that the position of a second drill bit is chosen randomly within the boundary zone of the first drill bit, that then the position of a third drill bit is chosen randomly within the boundary zone of the second drill bit and outside the smallest the distance surrounding the first drill bit, after which positions for each subsequent drill bit within the boundary zone are randomly selected. for the previous drill bit and outside the minimum distance from the previous drill bit.