CA1134806A - Convertible raised drill apparatus - Google Patents
Convertible raised drill apparatusInfo
- Publication number
- CA1134806A CA1134806A CA000352681A CA352681A CA1134806A CA 1134806 A CA1134806 A CA 1134806A CA 000352681 A CA000352681 A CA 000352681A CA 352681 A CA352681 A CA 352681A CA 1134806 A CA1134806 A CA 1134806A
- Authority
- CA
- Canada
- Prior art keywords
- engaging
- base
- support
- ground
- drill pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000153 supplemental effect Effects 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 abstract description 19
- 239000011435 rock Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000347881 Kadua laxiflora Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/024—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting having means for adapting to inclined terrain; having means for stabilizing the vehicle while drilling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling And Boring (AREA)
Abstract
CONVERTIBLE RAISED DRILL APPARATUS
Abstract of the Disclosure A raise drill apparatus includes a ground-engaging base, a support and guide structure projecting from the base, and a drill pipe-engaging and rotating mechanism slidingly connected to the support and guide structure. Hydraulic thrust cylinders are connected between the base and the engaging and rotating mechanism for supplying force axially to the drill pipe and moving the engaging and rotating mechanism back and forth along the support and guide structure.
The engaging and rotating mechanism is supported by and cantilevered from the support and guide structure and a supplemental ground-engaging support member is connected to the support and guide structure on the side opposite the engaging and rotating mechanism. The ground-engaging base engages the ground surface only on the same side of the drill pipe as the support and guide structure. The base includes an extended portion which projects to the other side of the drill pipe and a removable supplemental ground-engaging base is connected between the extended base portion and ground on said other side of the drill pipe for providing supplemental support during up-reaming and being removable so that the drill hole can be completed by the apparatus.
Abstract of the Disclosure A raise drill apparatus includes a ground-engaging base, a support and guide structure projecting from the base, and a drill pipe-engaging and rotating mechanism slidingly connected to the support and guide structure. Hydraulic thrust cylinders are connected between the base and the engaging and rotating mechanism for supplying force axially to the drill pipe and moving the engaging and rotating mechanism back and forth along the support and guide structure.
The engaging and rotating mechanism is supported by and cantilevered from the support and guide structure and a supplemental ground-engaging support member is connected to the support and guide structure on the side opposite the engaging and rotating mechanism. The ground-engaging base engages the ground surface only on the same side of the drill pipe as the support and guide structure. The base includes an extended portion which projects to the other side of the drill pipe and a removable supplemental ground-engaging base is connected between the extended base portion and ground on said other side of the drill pipe for providing supplemental support during up-reaming and being removable so that the drill hole can be completed by the apparatus.
Description
1~3~80~;
CONVERTIBLE RAISED DRILL APPARATUS
Back round of the Invention g This invention relates to the support structure of a raise drill apparatus and, in particular, to one which combines the operational advantages of a cantilevered support structure where the thrust and torque producing mechanisms are supported by a column extending from a base which engages the ground surface only on one side of the drill hole, with one where the thrust and torque producing mechanisms are not cantilevered and the base engages the ground surface on more than just one side of the drill hole.
A raise drill is an apparatus which i9 used for forming relatively large-diameter drill holes. This is done by drilling a pilot hole downwardly through earth strata until the drill bit emerges into an opening such as a mine entry.
The drill bit is replaced with a larger-diameter drilling head, the machine operating to pull and rotate the head back toward the ground surface along the pilot hole.
Machines of this type were traditionally designed so that the thrust cylinders and drill pipe rotating mechanism were supported on a ground engaging base which substantially surrounded the drill hole. Normally a concrete pad is formed on the ground surface with rock bolts projecting upwardly for engaging and anchoring the base in place.
Because of the weight distribution around the hole and short distance between the portion of the base which engages the concrete pad and the drill hole, the entire large-diameter hole could not be completed by the machine because of the possibility that once the cutting head emerged through the ground surfaoe the machine would fall into the ., , -80~;
--2--hole. Safe operational procedure required that when the cutting head approached within several feet of the ground surface the cutting head would have to be lowered and removed or restrained and the machine moved. The hole would then be completed by blasting or other techniques for removing the remaining material.
Attempts to overcome this problem include a raise drill apparatus where the thrust and torque producing hardware is cantilevered from a support frame so that the support base need only engage the supporting concrete pad on one side of the drill pipe. In this way, the cutting head was able to form the hole and be pulled all the way through the ground surface without danger of the machine falling into the hole because the base held in place by rock bolts embedded in the concrete pad was spaced substantially away from the drill pipe axis.
However, this cantilevered design caused other problems. For example, reactive forces to the required torque and thrust was of such a magnitude that additional supports were found necessary in order to operate at maximum efficiency.
Without these additional supports, rock bolts normally used to anchor the base of the machine to the concrete pad would tend to loosen. It was found that the most effective type of additional supports are hydraulic cylinders located between designated portions of the machine and a mine roof when the machine is located underground. Since there was no stable upper surface for above-ground usages of the machine, such supplemental supports were not available which sharply cur-tailed the effectiveness of a machine with this design above-ground. Further, the use of such supplemental supports, whenpossible, restrictsmachine access and requires additional set-up time.
Summary of the Invention The problems discussed above have been solved in accordance with the invention by a raise drill apparatus which has a cantilevered support structure, but which also includes removable supplemental ground-engaging pads located on the side of the drill pipe opposite the ground-engaging portion of the base, which operate to absorb reactive torque and thrust so that the advantages of the normal non-cantilevered apparatus are provided during drllling. The supplemental 1~3'~806 pads can be removed when the cutting head approaches the ground surface so that the hole can be completed by the cutting head, Since a cantilevered design is used the danger of the apparatus alling into the hole is eliminated.
The raise drill apparatus includes a ground-engaging base and a support and guide column projecting from the base.
It is understood that the term "ground-engaging" encompasses the base engaging a concrete support pad formed on the ground surface for supporting the apparatus. A drill pipe engaging and rotating mechanism is slidingly mounted on the support and guide column and thrust means, such as hydraulic thrust cylinders, are connected between the base and the drill pipe engaging and rotating mechanism. Torque and axial thrust are thus applied to the drill pipe for drilling the pilo~
hole and up-reaming the raised hole.
More specifically, the drill pipe engaging and rotating mechanism may include a motor, a chuck and appropriate gear, chain, or other drive connections between the two, the entire mechanism being supported by and cantilevered from the support and guide column, The base includes ground-engaging pads located on the same side of the drill pipe as the support and guide column. A supplemental ground-engaging support section is connected to the guide column on the side opposite the drill pipe for supporting the guide column, rock bolts projecting from the concrete pad operate to anchor the base and supplemental support section to the ground surface.
The base also includes an extension which projects to the side of the drill pipe opposite the support and guide column, a pair of supplemental ground-engaging pads being cg/~' ~ -.:
-113~806 connected between the extended base portion and ground for providing supplemental support during up-reaming. The supplemental pads are removable so that the drill hole can be completed by the cutting head.
In this way, during up-reaming operations the additional support pads which can be anchored to the ground surface with rock bolts for additional stability supply additional support for the apparatus through downward force against the ground reactive to the upward pull of the thrust cylinders. In this way the machine can operate the cutting head at full torque and thrust without the need for supplying additional supports to the machine.
~;r~
..~' - 3a -cg//~f '"
113~806 When the cutting head is pulled to the ~icinity of the ground surface, the supplemental pads can be removed and the cutting head used to comple~e the hole instead of having to remove the entire machine as in prior art devices where a non-cantilevered design is utilized. Since the drilling mechanism is cantilevered from one side of the apparatus, weight distribution and rock bolting are such that there is no danger of the apparatus falling into the drill hole. Much time is saved since normal up-reaming operations can be used to complete a hole instead of having to lower the cutting head and remove it from below, remove the equipment, and then blast or chip the remaining material, or by having to restrain the head by chains, etc., remove the machine, blast or chip out the material and then remove the head.
Brief Description of the Drawings These and other objects and advantages of the invention will become apparent when the detailed description of a preferred embodiment of the invention set forth below is considered in conjunction with the accompanying drawings, in which:
Figure 1 is a perspective view of a raise drill apparatus constructed in accordance with the invention;
Figure 2 is a side plan view of the base portion of the apparatus shown in Fig. l; and 1 25 Figure 3 is a front plan view of the base portion of Fig. 2.
Detailed Description of a Preferred Embodiment Referring now to Fig. 1, a raise drill 10 is shown which includes a base generally designated by reference numeral 12 which engages the ground surface at the rear of the apparatus and supports a guide and support column 14 upon which a drill pipe turning mechanism 16 is mounted for up and down movement. A pair of hydraulic thrust cylinders 18 are connected between the turning mechanism 16 and base 12 for supplying axial force to drill pipe engaged by the turning mechanism. The turning mechanism 16 includes a motor 20, chuck 22 and appropriate reduction gearing in gear box 23 connecting the two.
For a machine of this type, relatively large-diameter holes are formed by first drilling a pilot hole 113~80--5--downwardly through earth strata by utilizing torque supplied by the motor 20 and downward fsrce supplied by the thrust cylinders 18. Additional lengths of drill pipe are added as the hole progresses by using techniques well known in S the prior art. When the cutting bit emerges into a mine entry-way or other underground opening, the bit is removed and replaced with a large-diameter cutting head. The combination of torque with upward force will operate to form the large raise bore along the path of the pilot hole, lengths o~ drill pipe being removed as the hole progresses as is well known in the prior art.
Traditionally, raise drill apparatuses were designed with the base substantially surrounding the drill hole and the weight of the apparatus distributed around the base.
However, as the cutting head approached the ground surface, the cutting head would hav~ to be disconnected and the machine moved from the vicinity of the hole so that the hole could be completed either by blasting or by other methods. This was done to eliminate the danger of the machine falling in the hole.
A cantilevered-type raise drill apparatus such as shown in Fig. 1 was developed to overcome these problems, where the base 12 only engages the ground surface on one side of the drill pipe. In order to provide the necessary support for the torque and thrust producing hardware, a supplemental support frame 24 is provided which is anchored by suitable rock bolts and connected to the guide support column 14 through pivot pins 28 and a turnbuckle mechanism 26 which is adjustable for varying the angle of the guide support column 14 and accord-ingly the angle of the raise hole.
As shown in Fig. 2, the guide and support column 14is rigidly connected to a worktable 32. The base 12 includes a pair of rear support pads 30 which engage the ground sur-face and support the weight of the apparatus 10. The work-table 32 i5 connected to the pads 30 through the pivot pins28 so that the angle of the apparatus and accordingly the drill hole can be selectively varied by adjusting the turn-buckle 26. The thrust cylinders 18 are mounted on the work-table 32, the piston rods of the thrust cylinders 18 being connected through pins 34. The worktable includes a center opening 36 through which the drill pipe (not shown) can 1~3~806 project, a recessed portion 38 being provided to accommodate a fork member (not shown) for engaging indentations on the outer surface of the drill pipe so that sections can be added or removed from the drill pipe in a known way during the pilot hole drilling and up-reaming operations.
As described above, for cantilevered machineæ of this type, rock bolts ~not shown) are used to anchor the rear pads 30 and the outer end of the supplemental support frame 24 to a supporting concrete pad (not shown) in order to absorb reactive torque and thrust from the turning mechanism 16 and cylinders 18. However, as mentioned above a supplemental downward force had to be applied to the apparatus at full torque and/or thrust to prevent the rock bolts from loosening.
The supplemental force is applied in accordance with the invention by a pair of front supplemental support pads 40, connected between the front of the worktable 32 and the ground surface through turnbuckles 42, when the raise hole is being formed. The turnbuckles 42 are provided for adjusting the distance between the front pads 40 and the worktable 32 to maintain contact with the ground when the machine angle is varied by adjusting the turnbuckle 26. The turnbuckles 42 are connected between the worktable 32 and front pad 40 through pivot pins 46 and 48 to allow the relative angular adjustment mentioned above. A pair of turnbuckles 44 are provided to connect the front pads 40 to the rear pads 30 for additional stability.
As mentioned above, the front pads 40 are installed either during down-drilling to provide additional support for high drilling force, or during up-reaming operations to provide the additional support necessary for high thrust tor~ue reaming. Anchor bolts (not shown) can be used to anchor the front pads 40 to the ground. When the cutting head is within several feet of the ground surface, the front pads 40 can easily be removed by removing the pivot pins 46 and disconnect-ing the turnbuckles 44 so that the cutting head can be usedat a lower tor~ue and thrust to complete the hole.
Since the base is located only on one side of the drill pipe and anchored to the ground surface at a substantial distance from the drill hole, the danger of the machine falling in the hole is virtually eliminated so that the hole can be completed by the cutting head. However, the disadvantages .. .. . . ..
113L~806 of the cantilevered design are eliminated by providing the supplemental pads 40 for additional support so that the hole can be formed at maxim~m thrust and torque for optimum efficiency. In this way, the advantages of the cantilevered raised drill apparatus are combined with those of one where the ground supporting base substantially surrounds the drill hole, with the attendant disadvantages eliminated.
It should be kept in mind that improvements and modifications can be made to the invention by one with ordinary skill in the art and that all such improvements and modifications are contemplated as coming within the scope of the appended claims.
...... ,..... .. ~ .
CONVERTIBLE RAISED DRILL APPARATUS
Back round of the Invention g This invention relates to the support structure of a raise drill apparatus and, in particular, to one which combines the operational advantages of a cantilevered support structure where the thrust and torque producing mechanisms are supported by a column extending from a base which engages the ground surface only on one side of the drill hole, with one where the thrust and torque producing mechanisms are not cantilevered and the base engages the ground surface on more than just one side of the drill hole.
A raise drill is an apparatus which i9 used for forming relatively large-diameter drill holes. This is done by drilling a pilot hole downwardly through earth strata until the drill bit emerges into an opening such as a mine entry.
The drill bit is replaced with a larger-diameter drilling head, the machine operating to pull and rotate the head back toward the ground surface along the pilot hole.
Machines of this type were traditionally designed so that the thrust cylinders and drill pipe rotating mechanism were supported on a ground engaging base which substantially surrounded the drill hole. Normally a concrete pad is formed on the ground surface with rock bolts projecting upwardly for engaging and anchoring the base in place.
Because of the weight distribution around the hole and short distance between the portion of the base which engages the concrete pad and the drill hole, the entire large-diameter hole could not be completed by the machine because of the possibility that once the cutting head emerged through the ground surfaoe the machine would fall into the ., , -80~;
--2--hole. Safe operational procedure required that when the cutting head approached within several feet of the ground surface the cutting head would have to be lowered and removed or restrained and the machine moved. The hole would then be completed by blasting or other techniques for removing the remaining material.
Attempts to overcome this problem include a raise drill apparatus where the thrust and torque producing hardware is cantilevered from a support frame so that the support base need only engage the supporting concrete pad on one side of the drill pipe. In this way, the cutting head was able to form the hole and be pulled all the way through the ground surface without danger of the machine falling into the hole because the base held in place by rock bolts embedded in the concrete pad was spaced substantially away from the drill pipe axis.
However, this cantilevered design caused other problems. For example, reactive forces to the required torque and thrust was of such a magnitude that additional supports were found necessary in order to operate at maximum efficiency.
Without these additional supports, rock bolts normally used to anchor the base of the machine to the concrete pad would tend to loosen. It was found that the most effective type of additional supports are hydraulic cylinders located between designated portions of the machine and a mine roof when the machine is located underground. Since there was no stable upper surface for above-ground usages of the machine, such supplemental supports were not available which sharply cur-tailed the effectiveness of a machine with this design above-ground. Further, the use of such supplemental supports, whenpossible, restrictsmachine access and requires additional set-up time.
Summary of the Invention The problems discussed above have been solved in accordance with the invention by a raise drill apparatus which has a cantilevered support structure, but which also includes removable supplemental ground-engaging pads located on the side of the drill pipe opposite the ground-engaging portion of the base, which operate to absorb reactive torque and thrust so that the advantages of the normal non-cantilevered apparatus are provided during drllling. The supplemental 1~3'~806 pads can be removed when the cutting head approaches the ground surface so that the hole can be completed by the cutting head, Since a cantilevered design is used the danger of the apparatus alling into the hole is eliminated.
The raise drill apparatus includes a ground-engaging base and a support and guide column projecting from the base.
It is understood that the term "ground-engaging" encompasses the base engaging a concrete support pad formed on the ground surface for supporting the apparatus. A drill pipe engaging and rotating mechanism is slidingly mounted on the support and guide column and thrust means, such as hydraulic thrust cylinders, are connected between the base and the drill pipe engaging and rotating mechanism. Torque and axial thrust are thus applied to the drill pipe for drilling the pilo~
hole and up-reaming the raised hole.
More specifically, the drill pipe engaging and rotating mechanism may include a motor, a chuck and appropriate gear, chain, or other drive connections between the two, the entire mechanism being supported by and cantilevered from the support and guide column, The base includes ground-engaging pads located on the same side of the drill pipe as the support and guide column. A supplemental ground-engaging support section is connected to the guide column on the side opposite the drill pipe for supporting the guide column, rock bolts projecting from the concrete pad operate to anchor the base and supplemental support section to the ground surface.
The base also includes an extension which projects to the side of the drill pipe opposite the support and guide column, a pair of supplemental ground-engaging pads being cg/~' ~ -.:
-113~806 connected between the extended base portion and ground for providing supplemental support during up-reaming. The supplemental pads are removable so that the drill hole can be completed by the cutting head.
In this way, during up-reaming operations the additional support pads which can be anchored to the ground surface with rock bolts for additional stability supply additional support for the apparatus through downward force against the ground reactive to the upward pull of the thrust cylinders. In this way the machine can operate the cutting head at full torque and thrust without the need for supplying additional supports to the machine.
~;r~
..~' - 3a -cg//~f '"
113~806 When the cutting head is pulled to the ~icinity of the ground surface, the supplemental pads can be removed and the cutting head used to comple~e the hole instead of having to remove the entire machine as in prior art devices where a non-cantilevered design is utilized. Since the drilling mechanism is cantilevered from one side of the apparatus, weight distribution and rock bolting are such that there is no danger of the apparatus falling into the drill hole. Much time is saved since normal up-reaming operations can be used to complete a hole instead of having to lower the cutting head and remove it from below, remove the equipment, and then blast or chip the remaining material, or by having to restrain the head by chains, etc., remove the machine, blast or chip out the material and then remove the head.
Brief Description of the Drawings These and other objects and advantages of the invention will become apparent when the detailed description of a preferred embodiment of the invention set forth below is considered in conjunction with the accompanying drawings, in which:
Figure 1 is a perspective view of a raise drill apparatus constructed in accordance with the invention;
Figure 2 is a side plan view of the base portion of the apparatus shown in Fig. l; and 1 25 Figure 3 is a front plan view of the base portion of Fig. 2.
Detailed Description of a Preferred Embodiment Referring now to Fig. 1, a raise drill 10 is shown which includes a base generally designated by reference numeral 12 which engages the ground surface at the rear of the apparatus and supports a guide and support column 14 upon which a drill pipe turning mechanism 16 is mounted for up and down movement. A pair of hydraulic thrust cylinders 18 are connected between the turning mechanism 16 and base 12 for supplying axial force to drill pipe engaged by the turning mechanism. The turning mechanism 16 includes a motor 20, chuck 22 and appropriate reduction gearing in gear box 23 connecting the two.
For a machine of this type, relatively large-diameter holes are formed by first drilling a pilot hole 113~80--5--downwardly through earth strata by utilizing torque supplied by the motor 20 and downward fsrce supplied by the thrust cylinders 18. Additional lengths of drill pipe are added as the hole progresses by using techniques well known in S the prior art. When the cutting bit emerges into a mine entry-way or other underground opening, the bit is removed and replaced with a large-diameter cutting head. The combination of torque with upward force will operate to form the large raise bore along the path of the pilot hole, lengths o~ drill pipe being removed as the hole progresses as is well known in the prior art.
Traditionally, raise drill apparatuses were designed with the base substantially surrounding the drill hole and the weight of the apparatus distributed around the base.
However, as the cutting head approached the ground surface, the cutting head would hav~ to be disconnected and the machine moved from the vicinity of the hole so that the hole could be completed either by blasting or by other methods. This was done to eliminate the danger of the machine falling in the hole.
A cantilevered-type raise drill apparatus such as shown in Fig. 1 was developed to overcome these problems, where the base 12 only engages the ground surface on one side of the drill pipe. In order to provide the necessary support for the torque and thrust producing hardware, a supplemental support frame 24 is provided which is anchored by suitable rock bolts and connected to the guide support column 14 through pivot pins 28 and a turnbuckle mechanism 26 which is adjustable for varying the angle of the guide support column 14 and accord-ingly the angle of the raise hole.
As shown in Fig. 2, the guide and support column 14is rigidly connected to a worktable 32. The base 12 includes a pair of rear support pads 30 which engage the ground sur-face and support the weight of the apparatus 10. The work-table 32 i5 connected to the pads 30 through the pivot pins28 so that the angle of the apparatus and accordingly the drill hole can be selectively varied by adjusting the turn-buckle 26. The thrust cylinders 18 are mounted on the work-table 32, the piston rods of the thrust cylinders 18 being connected through pins 34. The worktable includes a center opening 36 through which the drill pipe (not shown) can 1~3~806 project, a recessed portion 38 being provided to accommodate a fork member (not shown) for engaging indentations on the outer surface of the drill pipe so that sections can be added or removed from the drill pipe in a known way during the pilot hole drilling and up-reaming operations.
As described above, for cantilevered machineæ of this type, rock bolts ~not shown) are used to anchor the rear pads 30 and the outer end of the supplemental support frame 24 to a supporting concrete pad (not shown) in order to absorb reactive torque and thrust from the turning mechanism 16 and cylinders 18. However, as mentioned above a supplemental downward force had to be applied to the apparatus at full torque and/or thrust to prevent the rock bolts from loosening.
The supplemental force is applied in accordance with the invention by a pair of front supplemental support pads 40, connected between the front of the worktable 32 and the ground surface through turnbuckles 42, when the raise hole is being formed. The turnbuckles 42 are provided for adjusting the distance between the front pads 40 and the worktable 32 to maintain contact with the ground when the machine angle is varied by adjusting the turnbuckle 26. The turnbuckles 42 are connected between the worktable 32 and front pad 40 through pivot pins 46 and 48 to allow the relative angular adjustment mentioned above. A pair of turnbuckles 44 are provided to connect the front pads 40 to the rear pads 30 for additional stability.
As mentioned above, the front pads 40 are installed either during down-drilling to provide additional support for high drilling force, or during up-reaming operations to provide the additional support necessary for high thrust tor~ue reaming. Anchor bolts (not shown) can be used to anchor the front pads 40 to the ground. When the cutting head is within several feet of the ground surface, the front pads 40 can easily be removed by removing the pivot pins 46 and disconnect-ing the turnbuckles 44 so that the cutting head can be usedat a lower tor~ue and thrust to complete the hole.
Since the base is located only on one side of the drill pipe and anchored to the ground surface at a substantial distance from the drill hole, the danger of the machine falling in the hole is virtually eliminated so that the hole can be completed by the cutting head. However, the disadvantages .. .. . . ..
113L~806 of the cantilevered design are eliminated by providing the supplemental pads 40 for additional support so that the hole can be formed at maxim~m thrust and torque for optimum efficiency. In this way, the advantages of the cantilevered raised drill apparatus are combined with those of one where the ground supporting base substantially surrounds the drill hole, with the attendant disadvantages eliminated.
It should be kept in mind that improvements and modifications can be made to the invention by one with ordinary skill in the art and that all such improvements and modifications are contemplated as coming within the scope of the appended claims.
...... ,..... .. ~ .
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A raised drill apparatus of the type which includes a ground-engaging base, support and guide means projecting from the base, drill pipe-engaging and rotating means slidingly connected to the support and guide means, thrust means connected between the base and the engaging and rotating means for supplying force axially to the drill pipe and moving the engaging and rotating means back and forth along the support and guide means, the apparatus including:
(a) the engaging and rotating means being supported by and cantilevered from the support and guide means;
(b) a supplemental ground-engaging support member connected to the support and guide means on the side opposite the engaging and rotating means;
(c) the ground-engaging base including a ground-engaging means located only on the same side of the drill pipe as the support and guide means;
(d) the base including an extended portion which projects to the other side of the drill pipe;
(e) supplemental ground-engaging base means removably connected to the extended base portion for engagement with the ground on said other side of the drill pipe to thereby provide supplemental support during drilling operations and being removable so that up-reaming of the drill hole can be completed by the apparatus.
(a) the engaging and rotating means being supported by and cantilevered from the support and guide means;
(b) a supplemental ground-engaging support member connected to the support and guide means on the side opposite the engaging and rotating means;
(c) the ground-engaging base including a ground-engaging means located only on the same side of the drill pipe as the support and guide means;
(d) the base including an extended portion which projects to the other side of the drill pipe;
(e) supplemental ground-engaging base means removably connected to the extended base portion for engagement with the ground on said other side of the drill pipe to thereby provide supplemental support during drilling operations and being removable so that up-reaming of the drill hole can be completed by the apparatus.
2. The apparatus fo claim 1, wherein the base includes a worktable with an opening for the drill pipe, the support and guide means being connected to the worktable, the extended portion forming the front of the worktable.
3. The apparatus of claim 2, wherein the support and guide means is pivotally connected at the rear end of the worktable to the base and the connection between the extended portion and supplemental base means includes means for adjusting the distance between the extended portion and the supplemental base means.
4. The apparatus of claim 3, wherein means for adjusting includes a turnbuckle assembly.
5. The apparatus of claim 1, wherein the supplemental base means includes a pair of ground-engaging pads, one located on each side of the drill pipe.
6. The apparatus of claim 5, wherein the ground-engaging means includes a second pair of ground-engaging pads, one located on each side of the drill pipe, the first and second pads on each side of the drill pipe being connected to each other by additional connection means other than the base, the additional connecting means being removably connected to said second pads.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5157879A | 1979-06-25 | 1979-06-25 | |
| US051,578 | 1979-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1134806A true CA1134806A (en) | 1982-11-02 |
Family
ID=21972157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000352681A Expired CA1134806A (en) | 1979-06-25 | 1980-05-26 | Convertible raised drill apparatus |
Country Status (8)
| Country | Link |
|---|---|
| AU (1) | AU5887180A (en) |
| CA (1) | CA1134806A (en) |
| DE (1) | DE3024379A1 (en) |
| FR (1) | FR2459873A1 (en) |
| GB (1) | GB2053321B (en) |
| SE (1) | SE8004653L (en) |
| ZA (1) | ZA803224B (en) |
| ZM (1) | ZM5480A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809924B (en) * | 2022-06-24 | 2022-09-02 | 陇东学院 | Reaming device for geological exploration |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2364850A (en) * | 1941-12-01 | 1944-12-12 | Sullivan Machinery Co | Rotary drilling apparatus |
| FR1451807A (en) * | 1965-10-27 | 1966-01-07 | Ts Kb G Geol Komiteta Ussr | Portable drilling rig for rotary boring |
| US3454114A (en) * | 1968-06-04 | 1969-07-08 | Robbins & Assoc James S | Drilling machine |
| CA919160A (en) * | 1971-01-04 | 1973-01-16 | Heath And Sherwood Drilling Limited | Universal drilling rig |
-
1980
- 1980-05-26 CA CA000352681A patent/CA1134806A/en not_active Expired
- 1980-05-29 AU AU58871/80A patent/AU5887180A/en not_active Abandoned
- 1980-05-29 ZA ZA00803224A patent/ZA803224B/en unknown
- 1980-06-05 GB GB8018510A patent/GB2053321B/en not_active Expired
- 1980-06-10 ZM ZM54/80A patent/ZM5480A1/en unknown
- 1980-06-23 FR FR8013862A patent/FR2459873A1/en active Granted
- 1980-06-24 SE SE8004653A patent/SE8004653L/en not_active Application Discontinuation
- 1980-06-25 DE DE19803024379 patent/DE3024379A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| ZM5480A1 (en) | 1981-09-21 |
| FR2459873B1 (en) | 1983-09-02 |
| DE3024379A1 (en) | 1981-01-08 |
| ZA803224B (en) | 1981-05-27 |
| FR2459873A1 (en) | 1981-01-16 |
| GB2053321A (en) | 1981-02-04 |
| GB2053321B (en) | 1983-03-23 |
| AU5887180A (en) | 1981-01-08 |
| SE8004653L (en) | 1980-12-26 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |