WO2005087393A1 - Tetes et ensembles a vibrations et utilisations associees - Google Patents

Tetes et ensembles a vibrations et utilisations associees Download PDF

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Publication number
WO2005087393A1
WO2005087393A1 PCT/NZ2005/000047 NZ2005000047W WO2005087393A1 WO 2005087393 A1 WO2005087393 A1 WO 2005087393A1 NZ 2005000047 W NZ2005000047 W NZ 2005000047W WO 2005087393 A1 WO2005087393 A1 WO 2005087393A1
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WO
WIPO (PCT)
Prior art keywords
shuttle
fluid
vibrational
chamber
frame
Prior art date
Application number
PCT/NZ2005/000047
Other languages
English (en)
Inventor
Roger Pfahlert
Original Assignee
Flexidrill Limited
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
Priority claimed from NZ531833A external-priority patent/NZ531833A/en
Application filed by Flexidrill Limited filed Critical Flexidrill Limited
Publication of WO2005087393A1 publication Critical patent/WO2005087393A1/fr
Priority to US11/311,630 priority Critical patent/US20060225922A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/12—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses
    • 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
    • E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
    • 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
    • E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses

Definitions

  • the present invention relates to vibrational apparatus.
  • the present invention relates to vibration generation (which may or may not generate sound) as might be useful, inter alia, in vibrational drilling.
  • the invention relates to related apparatus, methods, systems and procedures.
  • the present invention relates to vibrational apparatus capable of providing a vibrational output for any one of a diverse range of purposes (e.g whether for the purpose of vibrating a drill string, a hopper, a powder feed line, a conveyor, or the like).
  • vibration There is frequently a need to provide vibration. Examples of use of vibration includes separation procedures reliant on the buoyancy of particulate materials in amongst other particulate materials, stripping of sand from a cast item, ground or other compaction, pile driving and drilling (including directional and/or rotary drilling). Usually vibration is generated reliant upon the spinning of an eccentric weight or counter rotating weights. See for example, US Patent 3,866,480 which discloses an orbital vibrator. Such orbiting mass oscillators may employ orbiting rollers which are rotatably driven around the inner race wall of a housing, as disclosed in US Patent No. 4815328 to Bodine, or an unbalanced rotor, the output of which is coupled to a drill bit as disclosed in US Patent No.
  • Sonic drilling is accomplished by vibrating a drill string to produce compressive and expansive waves in the drill string. The vibrations are induced in a longitudinal direction of the drill string and the drill string is preferably vibrated at a resonant frequency.
  • the resonant frequency is dependent upon a number of factors including the length of the drill string.
  • the vibrational forces on the drill string causes the drill string to contract and expand in the longitudinal direction.
  • the vibrational forces at the bottom of the drill string shear, displace and/or otherwise fracture apart the soil and/or rock particles thereby cutting through the formation.
  • drilling systems which employ cycloidal sonic energy as a method of drilling cause a highly effective action on the bottom and particularly the adjacent side walls of the bottom portion of a well bore by virtue of the cycloidal drilling action.
  • the present invention recognises an advantage is derivable in the area of vibrational drilling where it is possible to commence the generation of the vibrational head whilst in its operative connection (directly or indirectly) with the drill string.
  • the present invention recognises a significant advantage to be derived from the vibrational commencement point of view and/or tuning point of view irrespective of how the apparatus is mounted. This arises from the fact that we have determined that a shuttle without a direct output to the apparatus to be vibrated can itself be sufficient without impacting solid to solid (whether in conjunction with hydraulic and/or pneumatics or not) to provide the requisite output from the containment structure of a shuttle i.e one end complement of a shuttle or both such end complements of the shuttle. It is to this in one aspect therefore that the present invention is directed to at least provide the public with the useful choice.
  • vibrational head assembly and/or a vibrational head for such assembly which will provide the option of start-up without a need for retraction in such circumstances and/or separation of the vibrational head in the drill string. It is an alternative or another object of one or some aspects of the present invention to provide a vibrational head assembly and/or vibrational head for such an assembly which enables the generation of vibrations (optionally including sonic vibrations) into a structure without a requirement for tuning to a resonant frequency of the structure for it to be vibrative.
  • start-up can commence without striving for resonance and/or without a need for resonance being achieved notwithstanding in some embodiments of the present invention such resonance can still be achievable by adjustment of control parameters as the vibrational head assembly is being used.
  • it is an object to provide a vibrational head and/or a vibrational head assembly not reliant upon the rotation of eccentrics but which imparts a useful vibration output that can be used in many situations or which at least provides the public with a useful choice (sonic vibrations alone generally do not develop enough energy to efficiently drill rock).
  • Rectified Sheet (Rule 91) It is an alternative or another object of one or more embodiments of the present invention to provide a vibration head and/or related vibration head assembly reliant upon separate fluid feeds, one for imparting the vibration and at least one for controlling, other input parameters e.g. amplitude, frequency, the valving, etc. It is an alternative or another object of one or more other embodiments of the present invention to provide a vibration head and/or vibration head assembly which has a fluid retrieval system that takes the fluid to ambient or near ambient pressures.
  • vibration head support arrangements and/or buffers and/or linkages which provide some freedom(s) of movement between at least part of the vibration head and a supporting frame yet allows some relativity of movement therebetween.
  • the present invention is also directed to vibrational apparatus with a drive in and a drive out capability (owing to a driven shuttle from which vibrational output is not directly taken) and to the related methods of operation and use which will at least provide a useful choice.
  • the present invention is adapted to provide a significant jackhammer effect which allows the device to rapidly penetrate rock formations.
  • the present invention is directed to vibrational apparatus able to provide a drive in and drive out in use for a connected drill string owing to reliance on a shuttle not directly outputting to the drill string.
  • the present invention in another aspect consists in vibrational apparatus capable of providing a vibrational output, said apparatus comprising or including a shuttle having first and second ends, a first complementary structure associating with the first end of said shuttle, and a second complementary structure associating with the second end of said shuttle, wherein there is a drive or drives to drive the shuttle alternately in each shuttling direction so that, in one direction, the first end moves away from the second complementary structure and, in the other driven shuttle direction, the second end moves away from the first complementary structure, and wherein the output of the vibration is from one or other, or both, of said complementary structures and not directly from the shuttle itself.
  • said first and second complementary structures are fixed relative to each other insofar as distance is concerned.
  • the drive(s) of the shuttle in at least one direction, and preferably both directions is selected from any of the forms hereinafter discussed whether it is by virtue of a direct mechanical drive through pivot links, a magnetic drive, a hydraulic drive, a pneumatic drive, a combustive drive or any alternative or combination thereof.
  • the drive type for the shuttle in each of its directions is the same but, in some less preferred forms of the present invention, a hybrid arrangement can be used.
  • the shuttling is without solid to solid high impact or impact contact.
  • said shuttle co-acts at least at one end with its complementary structure so as to provide a cushioning affect, e.g. by squeezing a fluid. Alternatively that can be at both ends.
  • One or both ends of the shuttle can be adapted to contact part of the complementary structure only at the end of its shuttling travel or to contact some material inteiposed between that end of the shuttle and the complementary structure.
  • the vibrational output is from one of the complementary structures.
  • the present invention consists in apparatus for generating a vibrational (e.g.
  • said apparatus comprising or including a shuttle, a first complementary member to coact with the shuttle to define a first pressurisable chamber, a second complementary member to coact with the shuttle to define a second pressurisable chamber, a first valving arrangement to control fluid flow into and out of the first pressurisable chamber, a second valving arrangement to control fluid flow into and out of the second pressurisable chamber, one or more supply (supplies) of pressurisable fluid, or adaption(s) therefor, to the shuttle whereby each of the first and second valving arrangements can allow or not allow fluid entry to the respective chamber, one or more outtake (outtakes) of fluid, or adaption(s) therefor, whereby each of the first and second valving arrangements can allow or disallow fluid egress from the respective chamber; wherein the valving arrangements and shuttle movement relative to the complementary member(s) is such that as the first valving arrangement allows fluid entry to the first chamber thereby to expand both the first
  • timing provided by the valving arrangements can allow some overlap of supply or exhaust flows between the respective chambers.
  • the “shuttle” in some embodiments may be perceived as substantially static yet moving relative to the other componentry. The opposite may also be the case as are many hybrids of the two. Accordingly “shuttle” as used herein throughout should be understood as shuttling relative to other aspects of the assembly.
  • the present invention consists in apparatus for generating a vibrational output, said apparatus comprising or including a shuttle, a first complementary member to coact with the shuttle to define a first pressurisable chamber, a second complementary member to coact with the shuttle to define a second pressurisable chamber, a first valving arrangement to control fluid flow into and out of the first pressurisable chamber, a second valving arrangement to control fluid flow into and out of the second pressurisable chamber, one or more supply (supplies) of pressurisable fluid, or adaption(s) therefor, to the shuttle whereby each of the first and second valving arrangements can allow or not allow fluid entry to the respective chamber, one or more outtake (outtakes) of fluid, or adaption(s) therefor, whereby each of the first and second valving arrangements can allow or disallow fluid egress from the respective chamber; wherein the valving arrangements and shuttle movement relative to the complementary member(s) is such that as the first valving arrangement
  • Rectified Sheet (Rule 91) wherein the valving arrangements and shuttle movement relative to the complementary member(s) is such that as the first valving arrangement allows fluid entry to the first chamber thereby to expand both the first chamber and volume of fluid therein, the second valving arrangement allows fluid egress from the second chamber thereby to allow both compression of both the second chamber and the volume of fluid therein, and so forth in an alternating shuttle moving manner, and wherein one, some or all of the following features are present: (a) the first and second complementary members and shuttle relate to each other on the same axis, (b) the output is (directly or indirectly) from one or other (or both) complementary member(s) rather than the shuttle, (c) the vibrational head when used for vibrational drilling (or some equivalent) has the shuttle independent of the drill string or equivalent means to be vibrated), (d) there is no drill rod nor rod extension through the shuttle or vibrational head (thereby to enable, if desired, multiple vibrational heads to be used in delivering power to a drill string or other means to be
  • the valving arrangement is proximate to the chamber thereby to optimise to a minimal distance between valving by the valving arrangement and the action of fluid being introduced into the proximate chamber, (i.e. to enable a shorter time for the shock wave of the input fluid to energise the piston and/or piston (preferably to enable operation at higher frequency when desired, to enable resonance at shorter stroke or amplitude, to provide higher efficiency and/or provide greater flexibility and versatility)), (m) the outtake of fluid from a chamber is not used to power the movement of the shuttle, (n) the outtakes of fluid is (are) to substantially ambient pressures prior to, if desired, such fluid being made available (e.g.
  • the fluid is primarily a liquid but may include some entrained gas (e.g. air) so as to confer some cushioning effect in the chamber
  • the shuttle can be caused to move even if there is no movement of one or other or both of said first and second complementary means e.g. as is the case if attached to a bound drill string
  • the vibrational head irrespective of whether or not its operation is tuned to provide resonance in a body or device (such as a drill string) directly or indirectly attached to one or other, or both, of the complementary means, can be operated with a jack hammer effect
  • the fluid supply and/or outtake involves or is preferably to involve an accumulator
  • the vibrational head is supported by a frame relative to which the vibrational head has at least in part some degree(s) of freedom to move
  • the vibrational head is linked to a frame by articulating (e.g. dog bones) or other linkages to allow some movement of a complementary means relative to the frame,
  • the vibrational head is supported by a frame and is buffered so as not to pass unnecessary shock into the frame (preferably such buffering including, in conjunction with any optional suitable linkage or linkages, the use of cushioning gas bags or the equivalent) (preferably as air bags as opposed to air springs are utilised), (v) the vibrational head is supported from a frame capable of being manipulated directly or indirectly to control the disposition of the vibrational head,
  • the vibrational head is optionally carried or supported directly or indirectly by a frame which directly or indirectly [e.g. a carried carriage or slide, or supports) for the frame as a carriage or slide] (but not linked to the vibrational head by any rigid member) has mounted at least part of an endless drive assembly for the valving arrangement(s) and/or a fluid motor for use in driving the valving arrangement(s), (x) a carriage or slide, or support(s) for a frame as a carriage or slide, carries a hydraulic motor and/or drive component (e.g.
  • the apparatus is substantially as hereinafter described but versions (less desired) may have substituted for the second complementary member (or second piston) some other arrangement to provide a driven return of the shuttle in use.
  • the invention consists in a vibrational head assembly suitable for generating an output (e.g. suitable for direct or indirect vibrational input into a structure (e.g.
  • a drill string or other medium capable of transmitting/absorbing the vibrational input
  • said assembly having a frame, and a vibrational head carrying, carried by, substantially locating and/or substantially being located by the frame, wherein the vibrational head has at least some freedom(s) to move relative to the frame, and/or vice versa, and wherein the vibrational head has a shuttle and two components each component with the shuttle defining one of two variable volume chambers, the shuttle being moveable relative to each component under the action of a fluid under pressure being supplied into one variable volume chamber and being released from the other variable volume chamber, and vice versa, and wherein the vibrational output is not or is not to be directly or indirectly from the frame nor the shuttle, and wherein it is adapted so that if driving a drill string with the vibrational output each cycle provides a drive in and a drive out of the drill bit carried by the drill string.
  • the invention consists in a vibrational head assembly for generating an output (e.g. for direct or indirect vibrational input into a drill string), said assembly having a frame, a vibrational head carrying, carried by, substantially locating or substantially being located by the frame, wherein the vibrational head has a spaced pair of parts or components ("complementary members" whether unitary or otherwise) each associating with a shuttle, and wherein the shuttle has a valving arrangement whereby a variable volume chamber can be defined by each complementary member with the shuttle as a consequence of shuttle position relative to each complementary member, such that when one chamber is at its allowed maximum volume the other is at its allowed minimum volume, and vice versa, and wherein the shuttle is caused to move from rest with respect to said complementary members thereafter to shuttle by fluid applied into a first chamber whilst being released from the second, by fluid applied into the second chamber whilst being released from first, and so forth, and where
  • each (or a common) valving arrangement includes a rotary valve member which includes an axial passageway to allow fluid outtake or supply (preferably outtake),
  • each valving arrangement includes a rotary valving member, such rotary valving members being operated on a common rotational axis and out of phase one with the other,
  • each valving arrangement is driven independently of the fluid supply and fluid outtake,
  • the outtake of fluid from a chamber is not used to power the movement of the shuttle, (n) the outtakes of fluid is (are) to substantially ambient pressures prior to, if desired, such fluid being made available (e.g. by pumping) for a return to the vibrational head,
  • the fluid is primarily a liquid but may include some entrained gas (e.g. air) so as to confer some cushioning effect in the chamber
  • the shuttle can be caused to move even if there is no movement of one or other or both of said first and second complementary means e.g. as is the case if attached to a bound drill string,
  • the vibrational head irrespective of whether or not its operation is tuned to provide resonance in a body or device (such as a drill string) directly or indirectly attached to one or other, or both, of the complementary means, can be operated with a jack hammer effect,
  • the fluid supply and/or outtake involves or is preferably to involve an accumulator,
  • the vibrational head is supported by a frame relative to which the vibrational head has at least in part some degree(s) of freedom to move,
  • the vibrational head is linked to a frame by articulating (e.g. dog bones) or other linkages to allow some movement of a complementary means relative to the frame, (u) the vibrational head is supported by a frame and is buffered so as not to pass unnecessary shock into the frame (preferably such buffering including, in conjunction with any optional suitable linkage or linkages, the use of cushioning gas bags or the equivalent) (preferably as air bags as opposed to air springs are utilised), (v) the vibrational head is supported from a frame capable of being manipulated directly or indirectly to control the disposition of the vibrational head, (w) the vibrational head is optionally carried directly or indirectly by a frame which directly or indirectly [e.g.
  • a carried carriage or slide, or support(s) for the frame as a carriage or slide] (but not linked to the vibrational head by any rigid member) has mounted at least part of an endless drive assembly for the valving arrangement(s) and/or a fluid motor for use in driving the valving arrangement(s), (x) a carriage or slide, or supports) for a frame as a carriage or slide, carries a hydraulic motor and/or drive component (e.g.
  • the vibrational head being locatable but with some freedom(s) to move by said frame, (y) drives and/or motors are to be or are, at least to some extent, substantially isolated from the vibration(s) of the vibrational head, standoff mounts being provided therefore.
  • the apparatus is substantially as hereinafter described but versions (less desired) may have substituted for the second complementary member (or second piston) some other arrangement to provide a driven return of the shuttle in use.
  • the invention consists in a vibrational head assembly for generating an output (e.g.
  • said assembly having a frame, as a vibrational head carrying, carried by and or substantially locating the frame, wherein the vibrational head has (preferably at least within bounds) at least some freedom(s) to move relative to the frame, and or vice versa, and wherein at least some of the mass (“the shuttle") of the vibrational head (inclusive of at least some of said fluid) under the action of valves and a pressurised fluid supply or pressurised fluid supplies for opposing variable volume chambers defined in part in each case by the shuttle, in use, is able to shuttle with respect to two other masses of the vibration head each of which defines in part a said chamber, and wherein it is from at least one of these other masses from which there is to be the vibrational output.
  • the invention consists in a vibrational head for generating an output (e.g. for direct or indirect vibrational input into a drill string), and wherein the vibrational head has at least one piston in a complementary cylinder moveable relative to each other to define a variable volume chamber under the action of a fluid under pressure supplied into or released from the variable volume chamber, and wherein one, some or all of the following features are present: the vibrational head when used for vibrational drilling (or some equivalent) has the shuttle independent of the drill string or equivalent means to be vibrated), there is no drill rod nor rod extension through the shuttle or vibrational head (thereby to enable, if desired, multiple vibrational heads to be used in delivering power to a drill string or other means to be subj ected to vibration), the outtake of fluid from a chamber is not used to power the movement of the shuttle, the outtakes of fluid is (are) to substantially ambient pressures prior to, if desired, such fluid being made available (e.g.
  • the fluid is primarily a liquid but may include some entrained gas (e.g. air) so as to confer some cushioning effect in the chamber
  • the vibrational head irrespective of whether or not its operation is tuned to provide resonance in a body or device (such as a drill string) directly or indirectly attached to one or other, or both, of the complementary means, can be operated with a jack hammer effect
  • the fluid supply and/or outtake involves or is to involve an accumulator
  • the vibrational head is supported by a frame relative to which the vibrational head has at least in part some degree(s) of freedom to move
  • the vibrational head is linked to a frame by articulating (e.g.
  • the vibrational head is supported by a frame and is buffered so as not to pass unnecessary shock into the frame (preferably such buffering including, in conjunction with any optional suitable linkage or linkages, the use of cushioning gas bags or the equivalent) (preferably as air bags as opposed to air springs are utilised), the vibrational head is supported from a frame capable of being manipulated directly or indirectly to control the disposition of the vibrational head, the vibrational head is carried directly or indirectly by a frame which directly or indirectly [e.g.
  • a carried carriage or slide, or support(s) for the frame as a carriage or slide] (but not linked to the vibrational head by any rigid member) has mounted at least part of an endless drive assembly for the valving arrangement(s) and/or a fluid motor for use in driving the valving arrangement(s), a carriage or slide, or support(s) for a frame as a carriage or slide, carries a hydraulic motor and/or drive component (e.g.
  • the present invention also consists in a vibrational head of or suitable for a vibrational head assembly of any of aforementioned kinds i.e. without a said frame. Whilst preferably the apparatus has a frame to hold the complementary members in association with the shuttle, that frame need not be a carriage on another frame e.g. the frame can be crane suspended.
  • the present invention consists in the use of a vibrational head or a vibrational head assembly of the present invention for the purpose of providing a vibrational input into a body, media or device.
  • the present invention consists in a method of drilling which involves the operative use of a vibrational head or vibrational head assembly in accordance with the present invention.
  • the present invention consists in, in combination, a drill string and a vibrational head assembly (or components therefor) and (optionally) related linkages, hydraulic supplies etc.
  • a single rotary valving unit preferably with a rotational axis substantially perpendicular to a shuttle stroke axis
  • a single rotary valving unit preferably with a rotational axis substantially perpendicular to a shuttle stroke axis
  • Such an embodiment is (as in Figure 10 hereof) is more prone to bogging down and restart difficulties. It is less preferred as shuttling can be hard to achieve at low input pressures.
  • a rotary valve member has a single radiused array of openings, such openings allowing the opening of an inlet port and the regions of the valving member between such openings closing the inlet ports.
  • the effect for each inlet port is to "open", "close” and
  • the present invention consists in vibrational apparatus comprising or including a piston, a chamber assembly defining a chamber in which the piston is adapted to shuttle between stroke limits, said chamber having a chamber end region at and or beyond each stroke limit of the piston, there being an inlet port into and an outlet port out of each chamber end region, a fluid supply assembly associated with said chamber assembly capable of supplying a pressurised fluid or any pressurised fluid it may receive in use to the inlet ports of the chamber, a fluid collection assembly associated with said chamber assembly to collect fluid from the outlet ports (and preferably capable of supplying that collected fluid for reuse via a said source of pressurised fluid), a first rotary valve capable of an out of phase allowing or disallowing of fluid movement from the fluid supply assembly into each said inlet port by opening or closing same, a second rotary valve capable of an out of phase disallowing or allowing of fluid movement from the chamber out of each said outlet port by closing or opening same, a first drive to rotate the first rotary valve, a second drive to rotate the second rotary valve
  • the term "drive” includes a dedicated or undedicated drive and can amount to no more than some transmission element or assembly capable of being driven (e.g. by a hydraulic or electric motor) [directly or indirectly] thereby to rotate the rotary valve(s).
  • the "timing link” can be and preferably is a driving link such that the drive into one drive in turn drives the other. Preferably preferments are as previously stated.
  • the timing link between the drives is a belt or chain linking pulleys, sprockets, or the like.
  • the vibrational apparatus is adapted to be linked into a remote hydraulic circuit to supply said pressurised fluid.
  • the vibrational apparatus is capable of being “tuned” so as to provide desired amplitudes of movement and or resonance outputs reliant upon a control of the pressure and/or volume of the pressurised fluid being supplied and/or a control of the timing link and drives.
  • the stroke axis is rectilinear.
  • the piston has two journaled extensions (not necessarily required to rotate but capable of sliding in the bearing or other surround).
  • one extension being the output member.
  • the inlet ports are laterally of the chamber with respect to the stroke axis.
  • the outlet ports are laterally of the chamber with respect to the stroke axis.
  • the piston (irrespective of whichever aspect of the present invention is involved) carries an output member.
  • the output member can be an extension of the piston or piston assembly such that the piston proper is rectilinearly guided but there is at least one protruding end of that assembly to provide the output.
  • such protruding end(s) and/or indeed the piston itself can act as a conduit for a quite separate fluid supply, e.g. it may be desirable to duct a gas, liquid or other material down and/or up from the drill string with which the output member might be associated in use, such fluids being kept distinct from the operating fluid of the vibrational apparatus.
  • the present invention consists in a method of vibrating a structure, assembly or member which involves associating vibrational apparatus of the present invention therewith and operating that vibrational apparatus so as to induce vibration thereof.
  • the present invention consists in pile driving, boring and or drilling involving the use of vibrational apparatus in accordance with the present invention.
  • the present invention also consists in pile driving and/or drilling or boring assemblies of any suitable kind which includes vibrational apparatus of the present invention, e.g. can include a drill head, a drill string and a vehicle or other prime mover to supply a hydraulic fluid as the working fluid.
  • vibrational apparatus of the present invention e.g. can include a drill head, a drill string and a vehicle or other prime mover to supply a hydraulic fluid as the working fluid.
  • the term “and/or” means “and” or “or”, or, where the context allows, both.
  • the term “comprises” or “comprising” can mean “includes” or “including”.
  • the term “(s)” following a noun can mean both the singular and plural versions of that noun.
  • the term “stroke limit of the piston” can refer to limits of a rectilinear stroke or any curved stroke (e.g. can include a stroke of a piston that swings about a pivot axis or other support, whether fixed or moving).
  • Reference herein to "out of phase” in respect of the allowing or disallowing of fluid movement from the fluid supply assembly(s) means substantially registering an opening of the rotary valve(s) to allow entrance of fluid into one end region whilst the other end region has its inlet port substantially closed by the or a rotary valve(s).
  • Reference herein to “out of phase” with respect to the inlet and outlet ports of the same chamber end region refers preferably, but not necessarily so, to the inlet port being closed by the or a rotaiy valve(s) whilst the outlet port is open.
  • the term "out of phase”, in any of its defined forms, is inclusive of both no overlap (i.e. no partial opening with partial closing) and some overlap.
  • the term "rapid" with respect to piston shuttling within the chamber refers to any speed of operation of the shuttle that will provide an output vibration of use to the application at hand and, in the case of "sonic drilling or boring", includes at least several cycles per second.
  • the cycles/sec are preferably above 20 cycles/sec. Many hundreds of cycles/second are envisaged, e.g. up to, for example, one or several thousand cycles/second.
  • Vibrational apparatus of the present invention operating with, for example, a hydraulic liquid as the fluid, at for example, about 200 bar (as is common for hydraulic fluid of excavators) can operate the shuttle at about 200 cycles/second.
  • the rapid cycling envisaged is from 20 to 500 cycles/second.
  • fluid includes a liquid (such as a hydraulic liquid - usually an oil but not necessarily so), a gas (for example, nitrogen or air) and, or mixtures of liquids and air or liquids and particulate solids or gas and particulate solids or any other suitable combination, e.g. emulsions of different liquids, mixtures of gases, etc.
  • a liquid such as a hydraulic liquid - usually an oil but not necessarily so
  • a gas for example, nitrogen or air
  • mixtures of liquids and air or liquids and particulate solids or gas and particulate solids or any other suitable combination e.g. emulsions of different liquids, mixtures of gases, etc.
  • head or “headed” in respect of any cylinder or chamber envisages a chamber closed by the stationary and/or movable “piston” irrespective of whether or not valving is via any one or more of a head, the cylinder and the piston.
  • Figure 1 is a three dimensional cutaway (the top complementary member or piston not being shown) of a preferred vibration head in accordance with the present invention having rotary valve members as part of the valving and timing arrangement for each chamber and having them aligned axially
  • Figure 2 is a top view of the apparatus of Figure 1 showing at the centre line the device cutaway by the quarter sector as shown in Figure 1
  • Figure 3 is a front view of the apparatus of Figure 2 shown in elevation
  • Figure 4 is the end view AA of the apparatus of Figure 3
  • Figure 5 is a section of the vibrational head shown in Figures 1 to 4, such section being along the centre line yet showing the device in elevation
  • Figure 6 shows a frame and ancillary apparatus assembly in accordance with the invention, there being shown an outtake mandrel for connection into the body to be vibrated by the first complementary means or directly from the first complementary means (e.g.
  • Figure 7 is for an opposed piston variant (i.e. having complementary variable volume chambers) a timeline against shuttle movement under the two scenarios (A) Fig 8', Fig 9', and so forth cycling and (A) Fig 8, Fig 8 A, Fig 9, Fig 9A, Fig 8, Fig 8A, Fig 9, 9A, Fig 8, and so forth cycling,
  • Figure 8' is a flow diagram of the apparatus shuttling to the right
  • Figure 9' is a flow diagram of the apparatus shuttling to the left
  • Figure 8 is a flow diagram as in Fig 8'
  • Figure 8A is a flow diagram where oil feed pressures momentarily match and reliance is placed on an accumulator in the oil system (not shown), but where the shuttle movement is a momentary precursor to the condition of Fig 9
  • Figure 9 is a flow diagram as in Fig 9'
  • Figure 9A is a flow diagram as in Fig 8A also where reliance is placed on an accumulator (the same or different - preferably different)
  • Figure 10 is an exploded cut away drawing of a less preferred embodiment, this embodiment having a single rotary valve adapted to control the opening and closure of inlet ports but having an always open outlet port structure but of lesser opening than the inlet ports when open
  • Figure 11 is a form of the present invention having two rotary valves, one for the inlet port set and one for the outlet port set thereby not requiring any differential in size of the inlet and outlet ports
  • Figure 12 shows another broken away view of the embodiment of
  • Figure 13 shows how in one other embodiment but relying on the mechanism typified by Figure 11, there can be a sprocket or other drive of each rotary valve timed relative to each other by a timing belt or belts and/or an idle shaft such that input by, for example, an electric or hydraulic motor as shown has the capability of controlling the speed of rotation of both rotary valves and
  • Figure 14 is a diagrammatic view of preferred apparatus in accordance with the present invention.
  • variable volume chambers there are two variable volume chambers and each operates in an out of phase manner with respect to the other such that there is a positive powering of each chamber to a larger volume under the valve controlled pressure and volume of supplied fluid thereby avoiding the need for outtakes of the fluids to provide any direct drive to diminish the volume of that same chamber otherwise than from an expanding effect on the other variable volume chamber.
  • neither chamber is ever to be devoid of liquid/fluid therein.
  • a piston assembly denotes a stationary valve block assy
  • denotes an O-Ring denotes a cap screw denotes a bearing block denotes a cap screw denotes a cap screw denotes a top center block denotes a bottom center block
  • denotes a washer denotes a valve shaft denotes a spherical roller thrust bearing denotes a single lip seal denotes a synchronous drive pulley denotes a taper lock bush denotes an 0-ring denotes an 0-ring denotes a valve shaft bush housing assy denotes a stationary valve block spacer denotes a cap screw denotes a valve shaft bush assy denotes a cap screw denotes a piston seal rim denotes a bearing block seal rim denotes a tire denotes a bearing cage denotes an 0-ring , and denotes a plastic piston
  • first variable volume chamber 30 and a second variable volume chamber 31 there is a first variable volume chamber 30 and a second variable volume chamber 31 and whilst a tire like flexible connection 32 and 33 respectively links each piston including part 34 and 35 with the shuttle 36
  • the amplitude of movement envisaged is relatively small during most operations. Preferably they range from a fraction of a millimetre to several centimetres but could be more the larger the vibrational head is.
  • the frequency can be from a few Hertz to thousands.
  • Each chamber is bounded by the piston part of its component 34 or 35 which preferably each includes peripheral pressure drop grooves with and/or without piston rings and/or seals.
  • each stationary valve block 37 or 38 is ported and coacts with a rotating valve member or rotating valve shaft 39 and 40 respectively to either allow fluid into or fluid from its proximate variable volume chamber 30 or 31.
  • Axially within each rotating valve member 39 is a passageway which ports radially therefrom which is used preferably for the outtake of fluid back to a collection chamber form whence it can be returned (e.g. by pumping) as shown in Figure 5.
  • the oil inlet lines are shown supply via passageways to the valving arrangement exteriorly of the rotating valving member 39 or 40.
  • a separate fluid supply (hot shown in Figure 5) is utilised for a hydraulic motor 41 which is to operate via the member 42 and endless drive belt or the equivalent 43 for each of rotating valve members 39 and 40.
  • Such a hydraulic motor receives a fluid supply preferably provided separately from the volume of fluid being supplied for the purpose of energising the sonic head insofar as the shuttle movement is concerned.
  • the arrangement which includes 41, 42 and 43 is on a slide 44 relative to a frame 45 which directly or indirectly supports the vibration head.
  • the frame 45 itself can be arranged as a slidable carriage on a support rail or other structure 46 such that preferably it operates relative thereto within limits . If desired the slide 44 and the rail or other structure 46 can be linked. Alternatively the frame 45 can be suspended from, for example, a crane.
  • the vibrational head having a drill string mandrel or the equivalent 47 adapted to be rotated by an endless drive belt/chain or the equivalent 48 driven by a hydraulic motor 49 (separate hydraulic feed again).
  • a drill string mandrel or the equivalent 47 adapted to be rotated by an endless drive belt/chain or the equivalent 48 driven by a hydraulic motor 49 (separate hydraulic feed again).
  • Optional rotation of the mandrel 47 will rotate or manoeuvre a drill string attached thereto whilst the mandrel or the equivalent 47 is vibratable (directly or indirectly) under the action of the proximate piston or complementary means of the vibrational head.
  • a proximate piston, piston assembly, or complementary means is preferably supported so as to be moveable at least in a longitudinal sense to some extent relative to the frame 45 and for this purpose some guided linkages are preferably provided.
  • links 50 and 51 on either side of the vibrational head can link by a pivot 52 or 53 to the vibrational head and by 54 and 55 to the frame 45.
  • Umits of movement can be imposed by compression springs 56 and 57 (or air bags) in conjunction preferably with airbags 58 and 59 which provide a cushioning or damping effect between the vibrational head and the frame 45 and in turn the carriages or supports 44 and 46.
  • the linkages allow some semblance of rotation of the dog bone links whilst at the same time allowing some axial displacement of the vibrational head as a whole, yet the shuttle 36 is free of direct contact with the frame and/or the slides or carriages 44 and 46 otherwise than as a consequence of the flexible drives and the hose and/or other linkages not shown in the attached drawings.
  • all connections are of flexible vibration resistance hoses connected so as to avoid involuntary disconnection.
  • the vibrational head of the present invention can start with a jackhammer effect even without drill string tuned for resonance. Control thereafter can be (a) speed of rotating valves (rotor) and/or (b) volume of fluid (e.g. oil).
  • Preferred forms can be of any scale and the foregoing is representative only. Larger shuttle sizes require larger heads.
  • the operation can be a direct millisecond range movement as in scenario (A) referred to in respect of Figure 7 (i.e. Fig 8', Fig 9', etc) but can instead be scenario (B) where conditions as in Figures 8A and 9A each requires an accumulator in the oil circuit to allow the momentary movement required to the following Figure 9 and Figure 8 instantaneous condition respectively.
  • apparatus in accordance with forms of the present invention as shown in Figures 10 to 13 will preferably be driven by a hydraulic system from, for example, by a vehicle or a standing prime mover to which the apparatus can be linked.
  • Hydraulic systems typically run at from 3000 to 5000 psi whereas this invention will typically run at below 3000 psi and more preferably in the range under 2000 psi.
  • the pressure hoses and or returns [most preferably the pressure input hoses] are to some extent isolated from the shuttle in order to reduce heat build up.
  • the piston 60 has extensions 61 journaled so as to allow axial movement. It matters not if the piston and the journals are circular in cross section and/or whether or not they are allowed to rotate within the chamber defined by the chamber assembly 62. As can be seen in the embodiment of Figure 10 there is a first chamber end region 63 and a second chamber end region 64 each accessible to an inlet port 65 and 66 respectively. Positioned so as to rotate substantially about an axis normal to the stroke axis of the piston 60 is a rotary valve 66 having on a same radius areas of no opening 67 and openings 68.
  • one of these openings 68 (designated 68A) is opening the pressurised liquid supply chamber 69 of the fluid supply assembly into communication with the chamber end region 63 whilst there is no such access via the second inlet port 66 into the chamber end region 64 owing to the out of phase state, i.e.; there is a region 67 holding the second inlet port 66 closed whilst the first inlet port 65 is open. The vice versa situation onwards will allow alternate charging to each chamber end region.
  • the fluid supply assembly 74 can be supplied with an infeed of a hydraulic fluid into the chamber 69 with the fluid finding its own way from there into one or other of the chamber end regions 63 and 64 and from thence via the exit ports (70 and 72 in one instance and 71 and 73) in the other instance back to the pumping system of, for example, the vehicle or prime mover with which the apparatus might be linked for return of that same hydraulic liquid back to the chamber 69 or such diversion thereof, as might be considered desirable, to a hydraulic motor for driving the rotary valve 66.
  • Another form of the present invention is that shown in Figure 12.
  • FIG. 10 This has similar to Figure 10 a piston 75 and journaled extensions 76 and 77 thereby defining chamber end regions 78 and 79 controllable by, for example, the rotary valve 80 with its openings and non openings similarly arrayed to the manner shown by reference to the embodiment of Figure 10.
  • the assembly 81 with its chamber 82 is adapted to receive pressurised hydraulic liquid and to selectively allow its movement into first one and then the other of the chamber end regions 79 and 79.
  • Timed to the rotation of the rotary valve 80 is a rotary valve member 83 which has the role of allowing the exhausting of hydraulic liquid from first one and then the other of the chambers 78 and 79 in an out of phase relationship to that of injection thereby to reciprocate the piston.
  • the exhaust rotary valve 83 preferably rotates at the same speed as the rotary valve 80 and the spacings of its openings is appropriate for each outlet from the chambers 78 and 79.
  • Figure 11 best shows the arrangement of these openings with a port 84 being closed by not being aligned with an opening 85 of the input rotary valve 80 whilst an outlet port 85 of that same chamber end region 86 is aligned with an opening 87 to allow outflow into the chamber 88 of the fluid collection assembly 79 from whence it is ducted back via, for example, the excavator, for pumped recycled use.
  • FIG. 13 shows in a bench test form an electric motor 90 (ideally it would be a hydraulic motor in use) driving directly a drive assembly adapted to rotate a first rotary valve (not shown) whilst a link belt 91 through an idle shaft 92 in turn through a second link belt 93 drives the other rotary valve (not shown) thereby providing the appropriate vibrational movement (caused by reciprocation of the piston) that extends into the journaled output member 94. In operation therefore appropriate tuning can occur of the vibrations required.
  • an electric motor 90 ideally it would be a hydraulic motor in use
  • a drive assembly adapted to rotate a first rotary valve (not shown) whilst a link belt 91 through an idle shaft 92 in turn through a second link belt 93 drives the other rotary valve (not shown) thereby providing the appropriate vibrational movement (caused by reciprocation of the piston) that extends into the journaled output member 94.
  • appropriate tuning can occur of the vibrations required.
  • an vehicle or prime mover has a capability of providing a substantially constant hydraulic flow and pressure into the apparatus of the present invention and there is a division of the flow so that one flow can supply a hydraulic motor to achieve rotary valve rotation whilst the other flow is to charge selectively either side of the piston under the action of the rotary valve timed or synchronised movement
  • a very simple control regime applies. This is far less complicated with far fewer moving parts and requiring lower tolerances than for any of the prior art procedures previously disclosed. For example, if the inlet port at one end is shut by its rotary valve then the hydraulic liquid cannot go anywhere and nothing will happen by way of charging into that end region. Contrarily however the same will not be the case at the other end if that is in part or wholly open.
  • the hydraulic oil flows into the piston chamber end region and forces the piston to the end of its stroke.
  • the rotary valve continues to turn and through its timing or synchronism with the other rotary valve, the "spent" hydraulic oil is allowed to release to exhaust.
  • the first rotary valve diverts oil to the other end of the piston in turn forcing the piston back.
  • the hydraulic drive through timing belts means that if the rotary valves in unison rotate slowly (say 10 rpm) the piston will shuttle very slowly but if both rotary valves are rotated at say 1000 rpm the piston could be moving, say, at approximately 200 times per second.
  • tuning for the various ground conditions can be achieved by the simple expediency of manipulating the speed of the synchronised rotary valves by the control of the fluid input to the hydraulic motor.
  • the apparatus howsoever mounted (preferably compliantly suspended) (not shown) has end members C and D that act as a first complementary means and F and H which act as a second complementary means. These complementary means are held in a fixed relationship by the members G.
  • the shuttle E moves back and forward within the physical bounds provided and ideally has a lesser shuttling distance to avoid impacting. It matters not whether or not the shuttle itself acts as a piston within a bore of a complementary end or vice versa.
  • This transfer of energy can be achieved by the injection of oil between the shuttle and its adjacent members with the appropriate timing to cause the shuttle to move in a reciprocal motion, thus to cause the drill string to move in a linear motion in parallel with the shuttle motion thus transferring the energy down the drill string to the bit in the most efficient manner.
  • the shuttle mass is the key to the transfer of the energy to the adjacent members. The change in direction of travel imparts the energy to the adjacent members. The more mass the shuttle has the greater the energy required to achieve this change in direction and is directly linked to the horse power required and therefore the more energy that can be imparted to the drill bit.
  • the relationship between the mass of the shuttle and the total mass of the drill string being vibrated has to be considered and sized appropriately.
  • the shuttle action has the advantage of never being in a situation of being stalled by locking or binding of the drill string in the drill hole.
  • the shuttle can deliver full power to the drill string or attachments that may be fitted.
  • the end plates and tie rods (G) (H) are the link between the adjacent members and these transfer the reciprocating energy to the drill string.
  • the shuttle action could be powered in different ways. (1) The ends of the shuttle could have a piston like arrangement fitted to operate like a conventional engine with air and fuel being fed through the adjacent members with valves fitted and firing alternately to reciprocate in the same way as being fed by oil. (2) The shuttle could be moved by magnetic means.
  • ends of the shuttle could have electromagnets or rare earth magnets fitted in such an arrangement that when the shuttle (E) was rotated it would pulse of the adjacent members that were also fitted with magnets fitted in such a way that would cause the shuttle to reciprocate.
  • a mechanical cam could be fitted to the shuttle (E). This cam could be held by bearings off the adjacent members (D) and (F). Driven by preferably hydraulic motors this action would impart the energy to the adjacent members in the same way.
  • Hybrids of the foregoing and/or other drives can be used.
  • the examples above all have a common theme.
  • the shuttle preferably never needs to touch the adjacent members in a physical sense as this would cause a spike shock wave to be generated. This would damage the drill string joints and associated down hole equipment.

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  • 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

L'invention porte sur une tête à vibrations (1) pour le forage à vibrations utilisant une alimentation hydraulique accordable au niveau de chaque extrémité d'une navette (36) dans un logement à partir duquel la sortie de vibrations est effectuée. La décharge se fait au moyen d'un système de soupape rotatif (39, 40) à l'intérieur et à l'extérieur de la chambre (30, 31). Ce système est équipé d'une capacité d'entraînement à l'intérieur/à l'extérieur, et permet un redémarrage facile et un fonctionnement efficace.
PCT/NZ2005/000047 2003-06-20 2005-03-17 Tetes et ensembles a vibrations et utilisations associees WO2005087393A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/311,630 US20060225922A1 (en) 2003-06-20 2005-12-20 Vibrational heads and assemblies and uses thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NZ531833 2004-03-18
NZ531833A NZ531833A (en) 2004-03-18 2004-03-18 Vibration head, typically for drill string, with shuttle moving rectilinearly and transferring vibration via complementary member
NZ532050 2004-03-30
NZ53205004 2004-03-30

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1937929A1 (fr) 2005-09-27 2008-07-02 Flexidrill Limited Suspension de train de tiges de forage
WO2010059036A1 (fr) * 2008-11-21 2010-05-27 Magali Hadar Effecteur de rebond
US7757783B2 (en) 2004-12-14 2010-07-20 Flexidrill Limited Vibrational apparatus
US8561723B2 (en) 2007-08-28 2013-10-22 Flexidrill Limited Magnetic hammer
WO2023111080A1 (fr) 2021-12-14 2023-06-22 Subsea 7 Norway As Installation et retrait de fondations sous-marines

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US4348912A (en) * 1979-08-21 1982-09-14 Thomas Hubert E Variable amplitude vibrator apparatus
US4548281A (en) * 1982-02-16 1985-10-22 Bodine Albert G Apparatus and method for installing well casings in the ground employing resonant sonic energy in conjunction with hydraulic pulsating jet action
US4836299A (en) * 1987-10-19 1989-06-06 Bodine Albert G Sonic method and apparatus for installing monitor wells for the surveillance and control of earth contamination
EP0333484A2 (fr) * 1988-03-18 1989-09-20 Intech International Inc. Dispositif à pulsations de débit pour installation de forage de fond de trou
EP0370709A1 (fr) * 1988-11-25 1990-05-30 Intech International Inc. Dispositif à pulsation de débit pour train de tiges de forage
US5281775A (en) * 1992-10-16 1994-01-25 Richard A. Gremillion Vibrating hole forming device for seismic exploration
US5417290A (en) * 1994-09-02 1995-05-23 Water Development Technologies, Inc. Sonic drilling method and apparatus
US5473579A (en) * 1993-10-25 1995-12-05 Ronald L. Shaw Well bore communication pulser
WO1997046787A1 (fr) * 1996-06-07 1997-12-11 Kveilerorvibrator As Dispositif hydraulique a relier dans une colonne de tubes
GB2332690A (en) * 1997-12-12 1999-06-30 Thomas Doig Mechanical oscillator and methods for use
US6044710A (en) * 1995-03-31 2000-04-04 Shinko Electric Company, Ltd. Elliptical vibratory apparatus
US6257268B1 (en) * 1999-12-01 2001-07-10 Gilmore Valve Company Pressure biased shuttle valve
WO2004113668A1 (fr) * 2003-06-20 2004-12-29 Flexidrill Limited Ensembles tetes soniques et utilisations

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348912A (en) * 1979-08-21 1982-09-14 Thomas Hubert E Variable amplitude vibrator apparatus
US4548281A (en) * 1982-02-16 1985-10-22 Bodine Albert G Apparatus and method for installing well casings in the ground employing resonant sonic energy in conjunction with hydraulic pulsating jet action
US4836299A (en) * 1987-10-19 1989-06-06 Bodine Albert G Sonic method and apparatus for installing monitor wells for the surveillance and control of earth contamination
EP0333484A2 (fr) * 1988-03-18 1989-09-20 Intech International Inc. Dispositif à pulsations de débit pour installation de forage de fond de trou
EP0370709A1 (fr) * 1988-11-25 1990-05-30 Intech International Inc. Dispositif à pulsation de débit pour train de tiges de forage
US5281775A (en) * 1992-10-16 1994-01-25 Richard A. Gremillion Vibrating hole forming device for seismic exploration
US5473579A (en) * 1993-10-25 1995-12-05 Ronald L. Shaw Well bore communication pulser
US5417290A (en) * 1994-09-02 1995-05-23 Water Development Technologies, Inc. Sonic drilling method and apparatus
US6044710A (en) * 1995-03-31 2000-04-04 Shinko Electric Company, Ltd. Elliptical vibratory apparatus
WO1997046787A1 (fr) * 1996-06-07 1997-12-11 Kveilerorvibrator As Dispositif hydraulique a relier dans une colonne de tubes
GB2332690A (en) * 1997-12-12 1999-06-30 Thomas Doig Mechanical oscillator and methods for use
US6257268B1 (en) * 1999-12-01 2001-07-10 Gilmore Valve Company Pressure biased shuttle valve
WO2004113668A1 (fr) * 2003-06-20 2004-12-29 Flexidrill Limited Ensembles tetes soniques et utilisations

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7757783B2 (en) 2004-12-14 2010-07-20 Flexidrill Limited Vibrational apparatus
EP1937929A1 (fr) 2005-09-27 2008-07-02 Flexidrill Limited Suspension de train de tiges de forage
US8561723B2 (en) 2007-08-28 2013-10-22 Flexidrill Limited Magnetic hammer
WO2010059036A1 (fr) * 2008-11-21 2010-05-27 Magali Hadar Effecteur de rebond
RU2512672C2 (ru) * 2008-11-21 2014-04-10 Хадар МАГАЛИ Отбойный механизм
AU2009318200B2 (en) * 2008-11-21 2015-01-15 Hadar Magali Rebound-effector
US9018864B2 (en) 2008-11-21 2015-04-28 Hadar Magali Rebound-effector
WO2023111080A1 (fr) 2021-12-14 2023-06-22 Subsea 7 Norway As Installation et retrait de fondations sous-marines

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