FR2521632A2 - Percussion drill using helical borer - where borer ends in axial cutter, and slides on percussion rods ending in peripheral cutters - Google Patents

Percussion drill using helical borer - where borer ends in axial cutter, and slides on percussion rods ending in peripheral cutters Download PDF

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Publication number
FR2521632A2
FR2521632A2 FR8202540A FR8202540A FR2521632A2 FR 2521632 A2 FR2521632 A2 FR 2521632A2 FR 8202540 A FR8202540 A FR 8202540A FR 8202540 A FR8202540 A FR 8202540A FR 2521632 A2 FR2521632 A2 FR 2521632A2
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Prior art keywords
percussion
auger
tube
central
fact
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French (fr)
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FR2521632B1 (en
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Individual
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Priority claimed from FR8117528A external-priority patent/FR2512875B1/en
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Priority to FR8202540A priority Critical patent/FR2521632A2/en
Publication of FR2521632A2 publication Critical patent/FR2521632A2/en
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Publication of FR2521632B1 publication Critical patent/FR2521632B1/fr
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/44Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/02Core bits
    • E21B10/04Core bits with core destroying means
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/36Percussion drill bits
    • E21B10/40Percussion drill bits with leading portion
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00Drives for drilling, used in the borehole
    • E21B4/16Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units

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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

This is an addn. to 81/17528, and describes a drill using a conventional percussion system. The drill includes an upper adapter plate joined by a rotary connector to a tube (a) with inlets for the percussion system. Tube (a) carries a transverse percussion bar provided with vertical rods (b) ending in side cutters. On the axis of the drill is a tube on which a helical drill slides and is provided with guide tubes (c) sliding on rods (b). On the base of the helical drill is a central cutter. If required, a key can be used to anchor the helical drill on the axial tube.

Description

DESCRIPTION,TARRIERE,à ELEMENTS DE PERCUSSION;SE CARACTERISE,PAR LE FAIT; Que les éléments,de percussiom;sont placés ex périphérie,et au centre;
Dans l'axe de la tarriere,parallèles ;à cet axe central;et jperpendiculai @res,aux éléments,hélicoidaux;qui constituentj; la partie inférieure de cette
Tarrière,Ces éléments de percussion;peuvent,etre accouplés;à une barre de
Percussion,placée transvursalement;à l'axe central de la tarrière;cet Au étant,constitué par us tule vertical,ou les éléments, de percussion
Pourent;etre placés,à l'intérieur de ce tube;ou sur les cotés de ce tube L'oraqut ces éléments de percussion,sont doubles,ou multiples;et adaptés
Sur la partie supérieure,de la barre de percussion;qui recoit le choc
Des éléments de percussion;ainsi constitués;par un système éventuel de
Percussionconventionnel;ou de percussion adapté,sous cette forme;il pout
Etre,égalem ent;utilisé,des tiges;qui portent des taillants,à leur extré @mité,imférieure;;et dont la partie supérieure de leur extrémité,s'adqpte
Sur la partie inférieure,de la barre de percussion htransversale;perpen -diculairom ent;à catte barre.Les tiges ainsi placées,étant guidées,par
Des tubes adaptés;sur la partis inféri@@re @élicoïdale de la tarrière;et
Coulissant,dans cas tubes;de même,il peut étre utilisé;des marteaux fond
De trou conventionuels;qui s'adaptent,sur un distributeur en alimenta -tion ,d'air;ou d'huile;ou tout autre élément d'énergie alimentant cas
Marteaux;ainei adaptés;et placés perpendieulairement à ce distributeur
En formation multiple;sur une ligne;à des inmtervales réguliers,ou ir@é- -@@liers;ou en qui@comce;;la partie inférioure étant guidée par des tubes
Perpendicnlaines à la partie inférioure hélicoïdal@;de la tarrière;cette
Partie,inférieure du marteam;qui coulisse;dans ces tubes guides,étant ;
Accouplée,et adaptée;à des taillants qui se trouvent,en contact avec le
Sol à désagréger.De mème;il pout etre utilisé;un tube central;sur lequel
Est placé un élément ,hélicoïdal en forme de tarriére;l'intérieur ou
Extérieur de es tubs;contonant un élément; de percussion,marteau fond de
Trou,ou marteau convontionnel;ou autre élément constituant un ensmble de
Percussion; dont la partie inférieure,percute ;une barre transversale Inférieure;P@@@@@@,sur la derniéra spirale;de la tarriere en hélicoïde ;
Soit,sous la forme d'une barre transversale,à l'axe central de la tar -riere;cette barre ayant des taillants,adaptés sur sa partie inférieure
Tournée vers le sol;et dont la partie supérieur ;coulisse dans des
Eléments;placés,sur la partie inférieure du dernier élément hélicotdal;
Cbnstituant,la spirale inférieure;de la tarriere ou: tube en contact avec
Le sol; la partie supérieure de la barre qui recoit le choc;des éléments
De percussion;répercut#ant de ce fait;ce choc aux taillants,placés sur
la barre de percussion rectiligne;ou sont adaptés ces taillants
Description,il pout etre utilisé,également; un tube centra@;sur loquel
Coulisse une tarriere;retenue,par un système, de clavetage,placé sur le
Tube central de la tarrière,ou sont placées les spires hélicoïdales;
Ce tube central coulissant,sur le tube guide; central;qui contient,ou S'adap@@@@ les éléments de peroussion;par les systèmes déjà énúméres
Et désignés, sous form@;de barre de percussion;ou tout autre système de
Percnssiom aimsi adapté;sur ces éléments ainsi constitués;soit par
Couplage,de tarriere ,ou de tubes avec éléments périphériques en spi -rale;fixes ,ou coulissants,et dont les éléments de percussion,sont
Adaptés on périphérie,et au centre;adaptés avec les systémes de percus -sion déjà énnméres,et désig@@és,dams leur forme et adaptation différentes
Les aystèmes adaptés pour le mème travail,à ce jour;utilisent le prim -cipe,de tubes carotteurs utilisant des marteaux de percussion,placés
En périphérie et éventvellement au centre; ce principe ne permet pas @@@ bonne év@cuation,des sédiments ou hlocs ainsi découpés;résultant de l'utilisation de ces systèmes en larges diamètres de découpage
L'aventage du système déposé;pout utiliser le princip@ de barre de dé -coupage;adapté sur un système de tarrière,cet @ns@mble,constituant
Un élément se nouveauté ,ou s'adaptent,des éléments conventionnels soit par adaptation directe,ou principes de fonctionnement interposés ou
Intercaléa danx le procesaue d'adaptation ainsi réalisé;par ocombinai -soms différentes,des principes convention@@l@ utilisés à @@ jour.
DESCRIPTION, TARRIERE, WITH PERCUSSION ELEMENTS; CHARACTERIZED, BY THE FACT; That the elements, of percussiom; are placed ex periphery, and in the center;
In the axis of the hole, parallel; to this central axis; and jperpendiculai @ res, to the elements, helical; which constitutej; the bottom of this
Tarrière, These percussion elements; can, be coupled; to a bar of
Percussion, placed transversely; at the central axis of the auger; this Au being, constituted by vertical us tule, or the elements, of percussion
Can; be placed, inside this tube; or on the sides of this tube The orora these percussion elements, are double, or multiple; and adapted
On the upper part of the percussion bar; which receives the shock
Percussion elements; thus constituted; by a possible system of
Conventional percussion; or adapted percussion, in this form; it can
Being, also; used, stems; which carry cutting edges, at their end, lower ;; and whose upper part of their end, adapts
On the lower part of the transverse percussion bar; perpen -diculairom ent; with catte bar. The rods thus placed, being guided, by
Tubes adapted; on the lower part @@ re @ elicoïdal of the auger; and
Sliding, in the case of tubes; likewise, it can be used; hammers bottom
Of conventional holes; which adapt, on a distributor in supply, air, or oil; or any other element of energy supplying case
Hammers; ainei adapted; and placed perpendicularly to this distributor
In multiple formation; on a line; at regular inmtervales, or ir @ é- - @@ liers; or in which @ comce ;; the lower part being guided by tubes
Perpendicnlaines to the lower helical part @; of the auger; this
Lower part of the marteam; which slides; in these guide tubes, being;
Coupled, and adapted; to cutters that are in contact with the
Soil to disintegrate.Likewise; it can be used; a central tube; on which
Is placed a helical element in the shape of an auger; the interior or
Exterior of tubs; containing an element; percussion hammer bottom
Hole, or conventional hammer; or other element constituting a set of
Percussion; the lower part of which strikes; a lower cross bar; P @@@@@@, on the last spiral; of the auger in helicoid;
Or, in the form of a transverse bar, to the central axis of the tar -riere; this bar having cutting edges, adapted on its lower part
Facing the ground; and the upper part of which slides in
Elements; placed on the lower part of the last helical element;
Cbnstituant, the lower spiral; of the auger or: tube in contact with
Floor; the upper part of the bar which receives the shock; elements
Percussion; repercussion # ant of this fact; this shock to the cutting edges, placed on
the straight percussion bar; or are these cutters adapted
Description, it can be used, too; a central tube @ on which
Slide an auger; retained by a keying system, placed on the
Central auger tube, where the helical coils are placed;
This sliding central tube, on the guide tube; central; which contains, or S'adap @@@@ the elements of peroussion; by the systems already enumerated
And designated, in the form @; of percussion bar; or any other system of
Percnssiom aimsi adapted; on these elements thus constituted; either by
Coupling, auger, or tubes with spi -ral peripheral elements; fixed, or sliding, and whose percussion elements are
Adapted on the periphery, and in the center; adapted with the percussion systems already ennméres, and desig @@ és, dams their shape and different adaptation
The aystems adapted for the same work, to date; use the prim -cipe, of coring tubes using percussion hammers, placed
On the outskirts and possibly in the center; this principle does not allow @@@ good ev @ cuation, sediments or hlocs thus cut; resulting from the use of these systems in large cutting diameters
The advent of the deposited system; to use the main cutter bar; adapted on an auger system, this @ ns @ mble, constituting
An element is new, or adapt, conventional elements either by direct adaptation, or operating principles interposed or
Intercaléa danx the adaptation process thus carried out; by ocombinai -soms different, principles convention @@ l @ used to @@ day.

Le dessim joint ;avec les différentes figures,montrent la désignation,
Des pri@@lpes énumérés;et qui penvent @tr@ adaptés,pour constituer ce
Système de forage,pouvant etre utilisé à des forages de grand diam8tr@.
The attached drawing; with the different figures, show the designation,
Pri @@ lpes listed; and who think @ tr @ suitable, to constitute this
Drilling system, which can be used for large diam8tr @ drilling.

LA PLABCHB(I') @@ flg@re (1 ) désigne en 1,1a plaque dj'adaptatio@
En 2,1@ corps du distributeur.En 3,1@ joint tournant.En 4,1a plaque Inférie@re d'adaptation. En 5,1@ tub@ supérieur. En 6,1es parties évldées
Ou Iumières de visite,du système de percussiom.En 7,1es iaces latérales
Du tube supérieur ouvertes ,pour le passage de la barre de percussiom
Ou du distributeur latéral;porte tiges ou marteaux.En 8,1a barre
Transversale de percussion,ou le distribufteur transversal,ou latéral.
LA PLABCHB (I ') @@ flg @ re (1) designates in 1,1a plate dj'adaptatio @
In 2.1 @ distributor body. In 3.1 @ rotating joint. In 4.1a Inferior plate @ adaptation. In 5.1 @ tub @ superior. In 6.1 evolved parts
Or visit lights, from the percussiom system. In 7.1 side iaces
From the open upper tube, for the passage of the percussiom bar
Or the lateral distributor; rod or hammer holder. In 8,1a bar
Percussion transverse, or transverse, or lateral distributor.

En 9,1es tubes,on parties latérales qui transmettent la percussiom.In 9.1 tubes, there are lateral parts which transmit the percussiom.

En 10,1a système de percussiom,central.En 11,1es adaptours,pour tiges,
On marteaux de percussiom En 12,les tiges ou marteaux de percussio@.
In 10.1a percussiom system, central. In 11.1 adaptors, for rods,
We percussion hammers In 12, the percussio @ rods or hammers.


En 13,1es tubes guides latéraux.En 14,la tarriere héli@oïdale.En 15,les
Taillants latéraux de percussiom.En 16,l@ taillant central.FIGURE 2 on numéro 17,1@ tube central guide coulissant.En 18,le clavetage du tube.

In 13,1es lateral guide tubes. In 14, the helical@oidal.
Percussiom side cutters. In 16, the central cutter. FIGURE 2 has number 17.1 @ central sliding guide tube. In 18, the keying of the tube.

FIGURE 3,en 19;les marteaux de percussion latérau. FI@URE 4,en 20;la Plaqu@ d'assem@@age,ajustabl@ avec la plaque 21,par les boulons 22. FIGURE 3, in 19; the side impact hammers. FI @ URE 4, in 20; the mounting plate, adjustable with plate 21, by bolts 22.

Claims (9)

REVENDICATIONS Dispositif, de tarière ;à éléments de percassion.Selon la revendication 1 Numéro (1) du brevet principal.Caractérisé,par le fait;que les éléments Multiples,de percussion;marteaux fond de trou,ou tiges de percussion Porte taillant;sont placés en périphérie,en ligne,ou en quinconce;à Intervalle régulier;ou irrégulier;par rapport,à l'élément de percus -sion;central,simple;ou multiple;placé,au centre d'une tarière,ou d'élé -ments hélicoïdaux;placés autour,d'un tube central;cylindrique,carré; Hexagonal;ou triangulaire.Ces éléments de percussion; étant perpendicu -Iaires > au distributeur; qui alimente en énergie le système de percus -sion;ou la barre de percussion latérale, porte tiges et taillants;et Sont placés de ce iaitaen paralèle,avec le tube central de la tarière Ou celui, des éléments en spirale hélicoïdaux;placés autour d'un tube C@ntral.Que les parties,en spirale opposées,à leur extrémité;comportent Un assemblage,de tubes;placés en li6ne,ou en quinconce,à intervalle Régulier ou irrégulier;divergents,ou parallèles;par rapport au tube Central;conversent en ligne,vers ce tube central;et dans lesquels , Coulissent les éléments de percussion;tige,ou marteau fond de trou ette Dispositif;central,de percussion et de centrage et guidage;fixes,ou Escamotables;;de même la tarièrespeut coulisser, sur le tube central;qui Dépassesdans la partie inférieure de la tarière,servant de pilotesaux Eléments périphériques,qui se trouvent en retrait; et sont soumis avec La tarière;à un mouvement de rotation, autour du tibe central.Il peut Etre également,placé sous la partie inférieure de la tariére;une barre De découpage porte taillant,sous la partie,en contact avec le sol.Cet Ensemble étant relié à un Joint tournant, et une rotative,à la partie Supéri@ure de l'appareil.CLAIMS Device, auger; with percussive elements.According to claim 1 Number (1) of the main patent.Characterized, by the fact; that the multiple percussion elements; down-the-hole hammers, or percussion rods Cutting door; are placed on the periphery, in line, or in staggered rows; at regular intervals; or irregularly; relative to the percussion element; central, single; or multiple; placed at the center of an auger, or elé - helical elements; placed around, a central tube; cylindrical, square; Hexagonal; or triangular.These percussion elements; being perpendicular -Iaires> to the distributor; which supplies energy to the percussion system - or the lateral percussion bar, rods and cutting edges; and are placed in parallel with this, with the central tube of the auger or that, helical spiral elements; placed around 'a tube C@ntral. That the parts, in opposite spiral, at their end; comprise an assembly, of tubes; placed in line, or in staggered rows, at regular or irregular intervals; divergent, or parallel; with respect to the central tube ; converse in line, towards this central tube; and in which, slide the percussion elements; rod, or hammer downhole ette Device; central, percussion and centering and guiding; fixed, or retractable;; likewise the auger can slide, on the central tube; which protrudes in the lower part of the auger, serving as a pilot for the peripheral elements, which are set back; and are subjected with the auger; to a rotational movement, around the central tibe. It can also be, placed under the lower part of the auger; a cutting bar door cutting, under the part, in contact with the ground. Assembly being connected to a rotary joint, and a rotary joint, to the upper part of the apparatus. 2 Dispositif,selon revendication (1) Caractérisé,par le fait;qutil est2 Device according to claim (1) Characterized by the fact that it is Utilisé une tarièresou un dispositif,à éléments;en spiraleshélicoidaux  Used an auger or device, with elements; in helical spirals Placés autour d'un tube,de section;cylindrique,carrée,hexagonale,ou Placed around a tube, of section; cylindrical, square, hexagonal, or Triangulaire. Triangular. 3 Dispositif,selon revendication@(1et2)Caractérisé,par le fait que les3 Device according to claim @ (1 and 2) Characterized by the fact that the Eléments de percussion,marteaux fond de trousou taillants,et tiges de Percussion elements, bottom hammer or cutting hammers, and Percussion porte taillant, sont parallèles,au tube central guide de la Percussion door cutter, are parallel to the central guide tube of the Tarière;ou éléments en spirale hélicoidaux;placés autour de ce tube. Auger; or helical spiral elements; placed around this tube. 4 Dispositif,selon;l'une des revendications(1à3)Caractérisé,par le fait4 Device according to one of claims (1 to 3) Characterized by the fact Que les parties,opposées,en spirales;comportent à leur extrémités,ai  That the parts, opposite, in spirals; have at their ends, ai A leur surface;un assemblage,de tubes guides;placés en ligne,ou en On their surface; an assembly of guide tubes; placed in line, or in Quinconce;et dans lesquels coulissent,les éléments de percussionmart-  Staggered; and in which slide the percussionmart- -eaux fond de trou ;ou tiges de percussion porte taillantsslatéraux.  - at the bottom of the hole; or percussion rods with side cutters. 5 Dispositif,selon l'une des revendications(1à4)Caractérisé,par le fait 5 Device according to one of claims (1 to 4) Characterized by the fact Que tout cet ensemble;est relié,à un distributeur;qui est relié;à un That all this set; is connected, to a distributor; which is connected; to a système de rotation, et est soumis, a la rotation par ce fait. rotation system, and is subject to rotation by this fact. 6 Dispositif, selon l'une des revendications(1à5)Caractérisé,par le fait;6 Device according to one of claims (1 to 5) Characterized by the fact; Que cet ensemble,tourne autour d'un pivot ;tube central guide;en décri That this assembly rotates around a pivot; central guide tube; in decri -vant un cercle;autour de ce dernier;auquel est rattachésou sur lequel - in front of a circle; around it; to which is attached or on which Coulisse la tarière. Slide the auger. 7 Dispositif, selon l'une des revendications(1à6)Caractérisé,par le fait;7 Device according to one of claims (1 to 6) Characterized by the fact; Que la tarière hélicodale,peut coulisser sur le tube central;servant That the helical auger can slide on the central tube; serving De sUpport;qui peut etre de section,carrée,hexagonale,rectangulaire; Support; which can be of section, square, hexagonal, rectangular; Ou cylindrique. Or cylindrical. 8 DEspositflis6elon l'une des revendications(1à7) Caractérisé,par le fait;8 DEspositflis6elon one of claims (1à7) Characterized, in fact; Que les éléments de percussionslatéraux au tube central;et de chaque Let the percussion elements lateral to the central tube; and of each Coté de ce tube;peuvent etre lègèrement divergents,en ligne,en quinconce Side of this tube; may be slightly divergent, in line, staggered A intervAlles réguliers,ou irréuliers;et en retrait;par rapporta  At regular or irregular intervals; and in retreat; compared L'élément de guidage ,ou de percussio central;du tube pilote. The guide element, or central percussio; of the pilot tube. 9 DIspositif,selon l'une des revendications(1à8)caractérisé,par le fait; 9 DIspositif, according to one of claims (1 to 8) characterized, in fact; Qu'il peut etre placé,un dispositif; de percussion, ou porte taillants de That it can be placed, a device; percussion, or cutting edges Percussion; ou barre porte taillant,de découpage et de percussion;sous Percussion; or cutting, percussion and cutting bar; La partie inférieure,de la tarière;en contact avec le sol. The lower part of the auger; in contact with the ground. 10 Dispositif,selon l'une des reven dications(1à9)caractérisé,par le fait10 Device, according to one of claims (1 to 9) characterized by the fact Qu'il peut etre adapté,à ce dispositir;le principe de la barre de percus That it can be adapted, to this dispositir; the principle of the percus bar --sion latérale, porte tiges et taillants de percussion;avec marteaux - side view, rod holder and impact bits; with hammers Piqueurs,ou perforateurs latéraux simples,ou multiples,adaptés au dis Single or multiple side stitches or punches, suitable for dis -tributeur;oi un,ou plusieurs marteaux, central et latéraux transmettant -tributor; oi, one or more hammers, central and lateral transmitting La percussion à cette barre de percussion latérale. Percussion at this side percussion bar. II Dispositif,selon l'une des revend ications(1à10)caract6risé,par le fait;II Device, according to one of the res ications (1 to 10) characterized, in fact; Qu'il peut etre adapté,à ce dispositif;le système de marteaux fond de That it can be adapted to this device; the hammer system bottom of Trou ;central et latéraux;coulissast dans les tubes guides. Hole; central and lateral; slide in guide tubes. 12 Dispositif,selon l'une des revendications(1à11)caractérisé,par le fait;12 Device according to one of claims (1 to 11) characterized in that; Que les figures de aessins jointes,à la demande;détaillent,les principes That the figures of aessins attached, on request; detail, the principles Revendiqués;et exposés dans les descriptions.  Claimed; and set out in the descriptions.
FR8202540A 1981-09-11 1982-02-12 Percussion drill using helical borer - where borer ends in axial cutter, and slides on percussion rods ending in peripheral cutters Granted FR2521632A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8202540A FR2521632A2 (en) 1981-09-11 1982-02-12 Percussion drill using helical borer - where borer ends in axial cutter, and slides on percussion rods ending in peripheral cutters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8117528A FR2512875B1 (en) 1981-09-11 1981-09-11 MULTIPLE TUBE DEVICE WITH ANNULAR ROTOPERCUSSION DEVICE FOR LOWER TUBE BY CENTRAL PERCUSSION BAR
FR8202540A FR2521632A2 (en) 1981-09-11 1982-02-12 Percussion drill using helical borer - where borer ends in axial cutter, and slides on percussion rods ending in peripheral cutters

Publications (2)

Publication Number Publication Date
FR2521632A2 true FR2521632A2 (en) 1983-08-19
FR2521632B1 FR2521632B1 (en) 1984-09-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE502529A (en) *
US2546899A (en) * 1948-11-23 1951-03-27 Salem Tool Co Coal boring head
FR1497722A (en) * 1966-10-06 1967-10-13 Underground sounding and drilling machine for soils at all depths, with electric motors
FR2247607A1 (en) * 1973-10-15 1975-05-09 Tone Boring Co

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE502529A (en) *
US2546899A (en) * 1948-11-23 1951-03-27 Salem Tool Co Coal boring head
FR1497722A (en) * 1966-10-06 1967-10-13 Underground sounding and drilling machine for soils at all depths, with electric motors
FR2247607A1 (en) * 1973-10-15 1975-05-09 Tone Boring Co

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FR2521632B1 (en) 1984-09-28

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