WO2024042470A1 - Perforateur léger - Google Patents

Perforateur léger Download PDF

Info

Publication number
WO2024042470A1
WO2024042470A1 PCT/IB2023/058379 IB2023058379W WO2024042470A1 WO 2024042470 A1 WO2024042470 A1 WO 2024042470A1 IB 2023058379 W IB2023058379 W IB 2023058379W WO 2024042470 A1 WO2024042470 A1 WO 2024042470A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill
piston
plunger
rotation
rotation means
Prior art date
Application number
PCT/IB2023/058379
Other languages
English (en)
Inventor
Marius Imaniel ACKERMANN
Original Assignee
Sulzer (South Africa) Holdings (Pty) Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sulzer (South Africa) Holdings (Pty) Ltd filed Critical Sulzer (South Africa) Holdings (Pty) Ltd
Publication of WO2024042470A1 publication Critical patent/WO2024042470A1/fr

Links

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
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E21B6/06—Drives for drilling with combined rotary and percussive action the rotation being intermittent, e.g. obtained by ratchet device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • 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
    • E21B11/00—Other drilling tools
    • E21B11/005—Hand operated drilling tools

Definitions

  • This invention relates to a lightweight drill and more particularly, but not exclusively, to a lightweight hydraulic rock drill.
  • Hand-held hydraulic mine drills exert rotational and percussive forces on a drill steel to drill into a rock face or mine wall, such as a mine hanging wall.
  • Hand-held hydraulic mine drills include top hammer drills, down-the-hole (DTH) drills and rotary percussion drills.
  • DTH down-the-hole
  • the drill having a plunger, a rotation means and a plunger actuator for reciprocating the plunger between an extended position in which a front end thereof forces a drill steel to an extended position and a retracted position in which the drill steel is free to move back onto the front end of the plunger, the plunger having plunger engagement formations on an outer surface thereof engaged with complementary rotation means engagement formations on an inner bore of the rotation means, the engagement formations extending at least partially radially from the plunger or from the bore so that movement of the plunger from its retracted position to its extended position causes rotation of the rotation means about its axis in one direction of rotation and thus rotation of the drill steel about its axis by the rotation means.
  • US patent publication number US20140174779A1 entitled “High frequency fluid driven drill hammer percussion drilling in hard formations”, filed in the name of Per A. Vatne, discloses a fluid pressure driven, high frequency percussion hammer for drilling in hard formations is presented.
  • a hammer piston of the percussion hammer has a relatively large and longitudinally extending bore that provides minimal flow resistance for a drilling fluid flowing through the bore during the return stroke of the hammer piston.
  • the bore is closeable in the upstream direction by a valve plug that follows the hammer piston during the stroke.
  • valve plug is controlled by a relatively long and slender valve stem that is mechanically able to stop the valve plug by approximately 75% of the full stroke length of the hammer piston and separates the plug from a seat ring.
  • the bore opens up such that the bore fluid can flow therethrough, and the inherent tension spring properties of the valve stem returns the valve plug so rapid that it will be good through flow during return of the hammer piston.
  • US patent number US6454026B1 entitled “Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure”, filed in the name of Matthew Floyd Shofner and assigned to Sandvik Intellectual Property AB discloses a down-the-hole percussive hammer that includes a cylindrical casing adapted to carry a drill bit, and a piston mounted in the casing for reciprocal movement to repeatedly strike the drill bit.
  • a top sub is mounted at a rear portion of the casing, the top sub including a front face facing the piston.
  • a feed tube is mounted to the top sub and extends forwardly along a centre axis of the casing and defines an air-conducting passage.
  • the piston includes an axial through-hole which slidably receives the feed tube.
  • the front face and the feed tube together define a recess opening toward the piston.
  • a removable volume-changer is insertable into the recess to vary a volume of a space in which the piston slides, and thus control a pressure at which the piston operates.
  • drills or drill assemblies are very heavy as the material which it is made of needs to be strong enough to withstand the percussive force required to drill into a rock face or mine wall.
  • the piston, which ultimately drives the drill steel forward needs to be made from a very durable material and is main contributor to the weight of the drill assembly.
  • the drill assemblies may also be cumbersome as the strong materials take up more space.
  • a lightweight drill comprising a piston having a weight of less than 1095 grams.
  • the piston prefferably has a maximum diameter of 40mm and a minimum diameter of 22.14 millimetres.
  • the length of the piston is a maximum of 245.4 millimetres.
  • the piston is connected to a hydraulic power source to enable reciprocal movement of a plunger and/or drill steel.
  • the piston prefferably has a central bore which defines an at least partially hollowed out core.
  • a drill assembly which the piston forms part of, to have a maximum total combined weight of 18.1 kg.
  • the piston is connected to a plunger, a rotation means and an actuator for reciprocating the plunger between an extended position in which a front end thereof forces a drill steel to an extended position and a retracted position in which the drill steel is free to move back onto the front end of the plunger
  • the plunger having plunger engagement formations on an outer surface thereof engaged with complementary rotation means engagement formations on an inner bore of plunger, the engagement formations extending at least partially radially from the plunger or from the bore so that movement of the plunger from its retracted position to its extended position causes rotation of the rotation means about its axis in one direction of rotation and thus rotation of the drill steel about its axis by the rotation means.
  • Figure 1 shows a perspective view of a lightweight drill
  • Figure 2 shows a perspective view of the piston
  • Figure 3 shows a side view of the piston
  • Figure 4 shows various views of the drill
  • Figure 5 shows various views of the piston.
  • a lightweight drill is generally indicated by reference numeral 1 .
  • the drill includes a piston 2 which reciprocatively moves to force a plunger and drill steel to a position in which the drill steel engages a surface to be drilled.
  • the piston 2 has a leading end 3 which connects to a plunger and a trailing end 4 which connects to a reciprocating hydraulic pressure source which forms part of the drill 1.
  • a piston 2 plays an integral part in the operation such as rotation, speed and power at which a drill can perform.
  • the piston 2 has a lighter than usual weight of 1095 grams as opposed to the more conventional weight of 1596 grams.
  • the piston 2 has at its widest point 5 a diameter of 40 millimetres and at its narrowest point 6 a diameter of 22.14 millimetres.
  • the piston 2 has between its leading end 3 and its trailing end 4 a maximum length 7 of 245.4 millimetres.
  • the drill assembly 1 was specifically designed to accommodate this, smaller, lightweight piston 2.
  • the drill 2, as such, is also lighter in weight and smaller in size as a cumbersome drill is no longer required to move the size and weight of conventional pistons.
  • the smaller drill assembly 1 has a total combined weight of 18.1 kg whereas the more conventional drill assemblies have a total combined weight of approximately, or more than 24.4 kg.
  • the smaller drill assembly 1 can work with water pressure of between 13 and 18 MegaPascal (“MPa”) at a water flow rate of 50 L/min (0.83 L/sec).
  • the drill 2 operates at around 260 revolutions per minute.
  • the smaller drill assembly 1 has a penetration rate of 1 .3 meters per minute at 110 - 120 Kg thrust and provides energy output of 19.3 kilowatts.
  • the lightweight drill described herein will be convenient to use in that it not only weighs less than conventional drills as known in the art, but also smaller is size. This means that it is easier for an operator to operate the drill underground in a mining environment.

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)

Abstract

La présente invention concerne un perforateur léger (1) et plus particulièrement, mais pas exclusivement, un perforateur hydraulique pour roche léger qui utilise un marteau ou un ciseau à va-et-vient, utilisé pour forer des trous. Le perforateur léger (1) comprenant un piston (2) ayant un poids inférieur à 1 095 grammes. Il est en outre prévu que le piston (2) ait un diamètre maximal (5) de 40 mm et un diamètre minimal (6) de 22,14 millimètres. La longueur (7) du piston (2) est au maximum de 245,4 millimètres. L'ensemble perforateur complet (1), dont le piston (2) fait partie, a un poids combiné total maximal de 18,1 kg.
PCT/IB2023/058379 2022-08-23 2023-08-23 Perforateur léger WO2024042470A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA202209409 2022-08-23
ZA2022/09409 2022-08-23

Publications (1)

Publication Number Publication Date
WO2024042470A1 true WO2024042470A1 (fr) 2024-02-29

Family

ID=90012661

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2023/058379 WO2024042470A1 (fr) 2022-08-23 2023-08-23 Perforateur léger

Country Status (1)

Country Link
WO (1) WO2024042470A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2246051Y (zh) * 1995-05-31 1997-01-29 天水风动工具厂 轻型手持式凿岩机
US20110073339A1 (en) * 2008-05-26 2011-03-31 Immanuel Werner Hammer drill and/or chisel hammer
US20210268636A1 (en) * 2018-06-28 2021-09-02 Robert Bosch Gmbh Machine Tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2246051Y (zh) * 1995-05-31 1997-01-29 天水风动工具厂 轻型手持式凿岩机
US20110073339A1 (en) * 2008-05-26 2011-03-31 Immanuel Werner Hammer drill and/or chisel hammer
US20210268636A1 (en) * 2018-06-28 2021-09-02 Robert Bosch Gmbh Machine Tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Makita HM1400 Abbruchhammer 18,1 kg", 4 January 2014 (2014-01-04), pages 1 - 5, XP093146196, Retrieved from the Internet <URL:https://www.amazon.de/Makita-HM1400-HM1400-Abbruchhammer-18-1-kg/dp/B00FMO6PIA?language=de_DE> [retrieved on 20231128] *

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