GB2194183A - Drilling apparatus - Google Patents
Drilling apparatus Download PDFInfo
- Publication number
- GB2194183A GB2194183A GB08620516A GB8620516A GB2194183A GB 2194183 A GB2194183 A GB 2194183A GB 08620516 A GB08620516 A GB 08620516A GB 8620516 A GB8620516 A GB 8620516A GB 2194183 A GB2194183 A GB 2194183A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- drilling apparatus
- drill
- drilling
- sleeve
- 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.)
- Withdrawn
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
- F16C1/02—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements
- F16C1/06—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing for conveying rotary movements with guiding sheathing, tube or box
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Drilling apparatus primarily for drilling holes in rock, e.g. in quarries and mines, comprises a shaft (15) having a flexible portion which extends through a deflector (20). The shaft has a rigid end portion which is attached to a drive motor (14) and an opposite rigid end portion secured to a drill bit (21). The flexible part, at least, of the shaft is housed in a protective sleeve of wound wire, which has a helical formation and defines a scroll for feeding debris from the hole being drilled. The rigid drill bit end also has helical formations. <IMAGE>
Description
SPECIFICATION
Drilling apparatus
This invention relates to drilling apparatus.
Holes are frequently drilled into rock in quarries and mines, for example, for the purpose of securing members to a face or roof, or for insertion of explosives. In small diameter tunnels or at a low-roof coal face with narrow seams, it is difficult to drill perpendicular to a wall or roof, because there is insufficient space to accommodate the usual drilling apparatus.
The present invention avoids this problem.
In accordance with this invention, there is provided drilling apparatus comprising a shaft provided with drill-mounting means at one end, drive means for rotatably driving the shaft, and means for axially advancing the shaft as it is rotated, wherein the shaft includes a flexible portion and deflecting means is provided for deflecting the flexible portion whereby the direction of movement of the drill-mounting means is inclined to the direction of movement of the part of the shaft adjacent the drive means. Preferably, the direction of movement of the drill-mounting means is generally perpendicular to the direction of movement of said part of the shaft.
The part of the shaft adjacent the drillmounting means is preferably rigid and guide means is provided for receiving the rigid part at the initiation of a drilling operation and for guiding the shaft during the drilling operation.
The shaft may be received in a flexible protective sleeve having a helical external formation adjacent the drill-mounting means for feeding debris from a hole during a drilling operation. The sleeve may be formed of wound wire.
The sleeve is preferably water-impermeable, means is provided fqr supplying water to the channel between the shaft and the sleeve, and an outlet is provided adjacent the drill-mounting means. Water fed along the channel runs back out of the drilled hole and assists in flushing debris out of the hole and in suppressing dust.
In an alternative arrangement the sleeve terminates at and is secured to said rigid part, which has a formation for feeding debris out of a hole during drilling.
It is also possible for the shaft to be hollow so that water can be fed along the centre of the shaft to a position adjacent the drillmounting means.
The means for feeding water preferably feeds an air/water mixture.
Reference is now made to the accompanying drawings, wherein:
Figure 1 is a diagrammatic side elevation of drilling apparatus according to the invention;
Figure 2 is a perspective view of a part of the apparatus;
Figure 3 is a perspective view of a detail of the apparatus; and
Figure 4 is a detail view showing a modification.
The apparatus shown in Figure 1 comprises a mobile body 11 on wheels 12 and provided with a hydraulically operable anchoring device 13. The body carries a hydraulic motor 14 which drives a shaft 15.
The shaft 15 is of the flexible type and runs horizontally and straight from the connection with the motor 14. Guides 16 (only one shown) are provided at spaced intervals to keep the shaft in its straight path.
The body carries a tubular deflector 20, which receives the shaft 15. The shaft passes through the deflector 20 and its free end, beyond the deflector, carries means for mounting a drill bit 21. The deflector has an input end 22 and an output end 23 which are axially perpendicular, with a curved intervening portion. The output end extends vertically.
The drill bit is surrounded by a spike plate 24, which locates the drill bit and serves as a shield.
In use, the shaft is rotatably and axially driven, so as to rotate and advance the drill bit. The apparatus can be used for drilling holes in a mine roof 27, where the seam is of narrow depth.
As shown in Figure 3, the shaft 15 has a rigid first end portion 15a, for connection to the motor 14, a rigid second end portion 15b adjacent and secured to the drill bit 21, and a main intervening flexible portion 15c.
The second end portion 15b is received and guided in the output end 23 of the deflector and has external formations 29, such as ribs in a helical arrangement.
The rigid second end portion 15b ensures that the drill-bit drills in a straight line and its formations 29 transport debris away from the drill bit.
The flexible portion 15c of the shaft is preferably encased in a sleeve. The sleeve may be made of wound wire and be attached to the rigid second end portion 15b. This arrangement protects the shaft and the helical exterior formation defined by the wound wire serves as a scroll to feed debris from a hole being drilled.
In the modification of Figure 4, the sleeve
30 is illustrated, but the sleeve also encases the rigid second end portion 15b. An annular channel 31 is defined between the shaft and the sleeve and has an annular mouth 32 adja
cent the drill bit 21. An air/water mixture is fed under pressure into the annular channel 31
at a suitable position and the mixture is forced
into the hole 33 being drilled through the
mouth 32. The air/water mixture assist in forcing debris along the helical formation at
the exterior of the sleeve 30 and suppresses
dust.
Claims (10)
1. Drilling apparatus comprising a shaft provided with drill-mounting means at one end, drive means for rotatably driving the shaft, and means for axially advancing the shaft as it is rotated, wherein the shaft includes a flexible portion and deflecting means is provided for deflecting the flexible portion whereby the direction of movement of the drill-mounting means is inclined to the direction of movement of the part of the shaft adjacent the drive means.
2. Drilling apparatus according to Claim 1, wherein the direction of movement of the drillmounting means is generally perpendicular to the direction of movement of said part of the shaft.
3. Drilling apparatus according to Claim 1 or 2, wherein the part of the shaft adjacent the drill-mounting means is rigid and guide means is provided for receiving the rigid part at the initiation of a drilling operation and for guiding the shaft during the drilling operation.
4. Drilling apparatus according to Claim 1, 2 or 3 including a flexible protective sleeve receiving the shaft, the sleeve having a helical external formation adjacent the drill-mounting means for feeding debris from a hole during a drilling operation.
5. Drilling apparatus according to Claim 4, wherein the sleeve is made of wound wire.
6. Drilling apparatus according to Claim 4 or 5, wherein the sleeve is water-impermeable, means is provided for supplying water to the channel between the shaft and the sleeve and an outlet is provided adjacent the drill-mounting means.
7. Drilling apparatus according to any one of
Claim 1 to 5, wherein the sleeve terminates at and is secured to said rigid part and the latter has a formation for feeding debris from a hole during drilling.
8. Drilling apparatus according to any one of
Claims 1 to 5 or Claim 7, wherein the shaft is hollow and defines a water supply channel which terminates adjacent the drill-mounting means.
9. Drilling apparatus constructed substantially as herein described with reference to
Figures 1 to 3 or Figure 4 of the accompanying drawings.
CLAIMS
New claims or amendments to claims filed on 12/8/87
Superseded claims 1, 7, 9
New or amended claims:
1. Drilling apparatus comprising a shaft provided with drill-mounting means at one end, drive means for rotatably driving the shaft, and means for axially advancing the shaft as it is rotated, wherein the shaft includes a flexible portion and deflecting means is provided for deflecting the flexible portion whereby the direction of movement of the drill-mounting means is inclined to the direction of movement of the part of the shaft adjacent the drive means, and a helical formation around at least a portion of the shaft for feeding debris from a hole during a drilling operation. 7. Drilling apparatus according to Claim 4 or 5, wherein the sleeve terminates at and is secured to said rigid part and the latter has a formation for feeding debris from a hole during drilling.
9. Drilling apparatus according to any one of
Claims 1 to 6, wherein a rigid portion of the shaft adjacent the drill-mounting means is provided with a helical formation for feeding debris from a hole during drilling.
10. Drilling apparatus constructed substantially as herein described with reference to
Figures 1 to 3 or Figure 4 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08620516A GB2194183A (en) | 1986-08-22 | 1986-08-22 | Drilling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08620516A GB2194183A (en) | 1986-08-22 | 1986-08-22 | Drilling apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8620516D0 GB8620516D0 (en) | 1986-10-01 |
| GB2194183A true GB2194183A (en) | 1988-03-02 |
Family
ID=10603141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08620516A Withdrawn GB2194183A (en) | 1986-08-22 | 1986-08-22 | Drilling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2194183A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0312724A1 (en) * | 1987-10-20 | 1989-04-26 | Kabushiki Kaisha Iseki Kaihatsu Koki | Method for excavating hole and apparatus therefor |
| ES2049590A2 (en) * | 1991-09-30 | 1994-04-16 | Rodio Cimentaciones Especiales | Hole borer for building arches, tunnels and the like. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4051908A (en) * | 1976-11-05 | 1977-10-04 | Driver W B | Downhole drilling system |
| GB1562570A (en) * | 1977-02-10 | 1980-03-12 | Bendix Corp | Articulated flexible shaft assembly with lockable universal joint |
| EP0100230A2 (en) * | 1982-07-26 | 1984-02-08 | Dickinson III, Ben Wade Oakes | Earth Boring Apparatus |
| GB2139929A (en) * | 1982-12-24 | 1984-11-21 | Klunder Horst | Drilling boreholes |
-
1986
- 1986-08-22 GB GB08620516A patent/GB2194183A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4051908A (en) * | 1976-11-05 | 1977-10-04 | Driver W B | Downhole drilling system |
| GB1562570A (en) * | 1977-02-10 | 1980-03-12 | Bendix Corp | Articulated flexible shaft assembly with lockable universal joint |
| EP0100230A2 (en) * | 1982-07-26 | 1984-02-08 | Dickinson III, Ben Wade Oakes | Earth Boring Apparatus |
| GB2124278A (en) * | 1982-07-26 | 1984-02-15 | Dickinson Ben Wade O | Earth drilling apparatus and method |
| GB2139929A (en) * | 1982-12-24 | 1984-11-21 | Klunder Horst | Drilling boreholes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0312724A1 (en) * | 1987-10-20 | 1989-04-26 | Kabushiki Kaisha Iseki Kaihatsu Koki | Method for excavating hole and apparatus therefor |
| ES2049590A2 (en) * | 1991-09-30 | 1994-04-16 | Rodio Cimentaciones Especiales | Hole borer for building arches, tunnels and the like. |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8620516D0 (en) | 1986-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |