GB1531337A - Feed leg for a percussive drilling machine - Google Patents
Feed leg for a percussive drilling machineInfo
- Publication number
- GB1531337A GB1531337A GB31992/76A GB3199276A GB1531337A GB 1531337 A GB1531337 A GB 1531337A GB 31992/76 A GB31992/76 A GB 31992/76A GB 3199276 A GB3199276 A GB 3199276A GB 1531337 A GB1531337 A GB 1531337A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston rod
- drilling machine
- feed leg
- chamber
- leg
- 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
- 238000005553 drilling Methods 0.000 title abstract 3
- 239000012530 fluid Substances 0.000 abstract 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/087—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods by means of a swinging arm
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
1531337 Feed leg for percussive drill TORQUE TENSION Ltd 21 June 1977 [30 July 1976] 31992/76 Heading B4C A feed leg for a percussive drilling machine comprises a cylinder 12 in which is slidably disposed a piston 10 to which is connected a piston rod 8, the cylinder being provided with an inlet port 36 for admitting hydraulic fluid into a working chamber 7 to extend piston rod 8, a variable-volume closed chamber 46 containing compressible fluid and separated from the working chamber by a movable wall 40, and means 14 at one end of the feed leg for connecting the leg to the drilling machine. The fluid, e.g. air or nitrogen in chamber 46 absorb the shock of the recoil of the drill. A second hydraulic fluid inlet 38 may be provided to retract piston rod 8. In the embodiment of Fig. 3 (not shown) variable-volume chamber 46 is defined by the interior of hollow piston rod 8 and auxiliary piston 40. In a further embodiment the movable wall is a flexible member, e.g. a bellows or a rubber bag.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31992/76A GB1531337A (en) | 1976-07-30 | 1976-07-30 | Feed leg for a percussive drilling machine |
| ZA00773786A ZA773786B (en) | 1976-07-30 | 1977-06-23 | A feed leg for a percussive drilling machine |
| CA281,586A CA1060428A (en) | 1976-07-30 | 1977-06-28 | Feed leg for a percussive drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB31992/76A GB1531337A (en) | 1976-07-30 | 1976-07-30 | Feed leg for a percussive drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1531337A true GB1531337A (en) | 1978-11-08 |
Family
ID=10331410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31992/76A Expired GB1531337A (en) | 1976-07-30 | 1976-07-30 | Feed leg for a percussive drilling machine |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1060428A (en) |
| GB (1) | GB1531337A (en) |
| ZA (1) | ZA773786B (en) |
-
1976
- 1976-07-30 GB GB31992/76A patent/GB1531337A/en not_active Expired
-
1977
- 1977-06-23 ZA ZA00773786A patent/ZA773786B/en unknown
- 1977-06-28 CA CA281,586A patent/CA1060428A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1060428A (en) | 1979-08-14 |
| ZA773786B (en) | 1978-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |