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Publication numberUS1879177 A
Publication typeGrant
Publication dateSep 27, 1932
Filing dateMay 16, 1930
Priority dateMay 16, 1930
Publication numberUS 1879177 A, US 1879177A, US-A-1879177, US1879177 A, US1879177A
InventorsGault John J
Original AssigneeW J Newman Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Drilling apparatus for large wells
US 1879177 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Sept. 27, 1932. J, GAULT 1,879,177


Sept. 27, 1932. J. J. GAULT DRILLING APPARATUS FOR LARGE WELLS Filed May l5, 1930 3 Sheets-Sheet 2 Sept 27 1932- J. J. GAULT A1,879,1'77



being commonly used for filling with concrete to provide building foundations. It includes not only novel mechanism for excavating and loosening material but also the method of operating and disposal of the 4excavated material.

The objects of this invention are to provide an improved method and' apparatus for drilling wells; to provide an apparatus of this character which will be relatively simple in l5 construction and durable and efficient in operation; to provide a drilling apparatus having a plurality of pointed or star shaped excavating devices; to provide a drilling apparatus having combined cutting and picking devices for attacking the material to be eX- cavated; to provide means for excavating material under ahead of water, whereby the water will tend to clean the excavating devices and will be thoroughly mixed or churned with the excavated material and suction or exhaust means provided for pumping the excavated material away from the cutters; and to provide such other novel features in construction and advantages in operation as will appear more fully hereinafter.

In the accompanying drawings illustrating this invention:

Figure 1 is a vertical sectional view ofthe drilling apparatus shown in position in a well taken on line 1 1 of Fig. 2; 1

Figure 2 is a .sectional view taken on line 2 2 of Fig. 1;

Figure 3 is a detail showing the lower cutting devices taken on line 3 3 of Figure 1;

Figure 4 is an enlarged sectional view taken on .line 4 4 of Figure 3.;

Figure 5 is a sectional view taken 0n line 5 5 of Fig. 1; A

Figure 6 is a sectional view taken on line 6 6 of Fig.v 1;

Figure 7 is a perspective view of one of the cutting devices; and i Figure 8 is a somewhat diagrammatic view showing the method of operation As shown in these drawings7 10 is the drill 1930. seriai No. 453,042.

The vertical or main portion of the head is hollow and preferably of somewhat larger diameter than the pipe 10. A substantial steml or projection 13 extends downwardly from the hollow portion and terminates in a V-shaped or spear shaped extension 1 4, as shown in Figures 1 and 4. Two flat cutting blades 15 are bolted to the extension 14, these blades being similar in shape tothe extension and having sides which converge at a relatively sharp angle in order to provide penetrating points 16 at the lower. endsthereof. One side of each of the blades is beveled and projects outwardly to provide a cutting edge as shown at 17, the whole making an exceedingly effective pilot bit.

A transverse shaft 18 is mounted in the stem 13 and is provided on either end with one or more cutting or excavating devices 19 which are rotatably mounted thereon. These excavating devices are preferably made star shaped, being provided with a number of relatively sharp points, as shown in Figure '7. These star cutters are preferablyv made of verv hard steel or the like.

' yThe cutter head 11 has a plurality of horizontally arranged shafts for supporting other excavating devices. One of-these shafts 20 is mounted adjacent to the lower end of the cutter head and extends outwardly through the hollow portion thereof. This shaft is preferably mounted in a pipe or tube 21 which fits closely in the holes in the sides of the cutter head and serves as a bearing for the shaft as well as strengthens the device. A series of star shaped cutters 22 are mounted on this shaft at suitable distances apart and are held in spaced relation by means of spreaders 23. These star shapedcutters are similar tothe cutters 19 heretofore described but preferably of larger diameter as shown. The outer ends of the shaft 2O are mounted in bearings 24 which comprise arms or projections extending downwardly from hollowv radial arms 25v which are formed integrally with the body 11 of the drill head and are parallel to the shaft.

The drill head has a second shaft 26 which extends through the body portion thereof and is arranged slightly above the shaft 2O and at right angles thereto. rlhe shaft 26 is mounted in a pipe 27 which is securely fastened in the drill head and may be welded thereto if desired. T he shaft 26 carries a plurality of star shaped cutters 28 which are arranged in spaced relation thereon being held by spreaders 29. These cutters are similar to the ones heretofore described but are of larger diameter than the cutters 22 so that they will cut or dig on the same plane as indicated in Figure 1. The outer ends of the shaft 26 are carried in bearings 30 which project downwardly from hollou7 radial arms 31 formed integrally with the body of the drill head 11 as shown in Figure 1. These arms are preferably on the same level with the arms 25. The central or body portion of the cutter head has a number of holes 32 in the bottom thereof, two of these holes being preferably arranged over each of the cutters 19 so that water will be forced downwardly onto these cutters and into the hole formed by these cutters and the pilot bit. The hollow arms 25 and 31 are provided respectively with slots or openings 33 and 34 which open downwardly in order to discharge water onto the series of cutters 22 and 28. The arms are also provided respectively with end holes 35 and 36 for discharging water downwardly around the outer periphery onto the cutters which may be arranged outside of the bearings as indicated. The water for this purpose is pumped downwardly through the pipe 10 into the cutter head by any suitable means such as the pump 37, as shown in Figure 3. While the discharge of water through the holes in the arms 25 and 31 may be effective in some cases, I have found that the principal benefit isjderived through the discharge from the holes 32 which direct the water to the cutting areas and if increased pressure is desired for the discharge through vthese holes, the holes in the arms may be omitted.

In carrying out my improved method the cutter head is rotated to cause the excavating devices to loosen the material and it will be particularly noted that the cutter head and parts connected therewith as well as the pipe 10 are preferably made very heavy so that the points of the cutters will be forcibly pushed or driven into the material at the bottom of the well. It will be noted that when the material is hard as for instance, in hard pan or the like, the cutters will have a pounding action as they pass from one point to another thereby tending to rapidly grind Vand cut the material which is at once acted upon by the water passing through the openings downwardly to the bits or cutting devices. The water and excavated material will be churned so that the material is held in suspension around the cutter head. rlhe water with this suspended material is drawn out through a pipe 38 which is arranged in the well and which is extended as the work progresses so that the lower end will be in close proximity to the cutter head as shown in Figure 8.

If desired gua-rd rings 39 may be arranged above the arms 25 and 31 in order to prevent the pipe 38 from passing down between the arms and coming in contact with the cutters. The water and suspended material is drawn upwardly through the pipe 38 by means of a pump 40, such material being discharged into a sump 41. Two other sump holes 42 and 43 are also preferably provided adjacent to the sump 41. When the material is being discharged -through the pipe 44 into the sump 41 the heavy particles are allowed to settle in the sump and the water willoveriiow, for instance into the sump 42 and this relatively clean water is drawn out through the pipe 45 by the pump 37 and forced downwardly through the pipe 10. A screen may be provided in the passageway between the sumps in order to screen the water passing therethrough. When the sump 41 becomes filled with sediment, thev discharge pipe 44 may be moved to the sump 43 for instance, and the water permitted to overflow into the sump 42 and the material may then be eX- cavated by means of buckets from the sump 41 so that it may again be used when the sump 43 becomes filled. In this manner the heavy particles which are loosened and held in suspension by the cutters are quickly drawn away and carried out of the well thereby leaving the cutters free to operate on relatively clear surfaces. It will also be understood that the wall is at all times preferably kept substantially full of water so that it will maintain a pressure on the side walls and also so that the pump 4() will only have a relatively short lift due to the head of the water above the mouth of the pipe 38. The cutters 22 are preferably arranged in staggered relation radially with respect to the cutters 28 whereby these smaller cutters will tend to break down the ridges or any material on the floor of the well which may project upwardly between the paths of the cutters 28. In this way all of the material will be suficientlybroken up so that it may be held.

in suspension in the water and drawn off by the discharge pump. The diameter of the well may be decreased or increased by shortening or lengthening the cutter supporting shafts and decreasing or increasing the num- -ber of cutters beyond the outer bearings 24 and 30. Y

From this description it will be seen that I provide a comparatively simple apparatus which will tend' to rapidly eXc-avate or loosen thematerial withaniinimum amount of power and with a minimum amount of wear on the excavating devices and also provide means whereby the heavier particles of excavated material may be withdrawn from the well so that they do not interfere with the cutting or drilling operations. It will also be noted that changes may be made in the construction of the apparatus or'in carrying out the method of operation without departing from the scope of my invention Vand therefore I do not wish Vto be limited to the particular features herein sho-wn and described except as set forth in 'thefollowing claims in which I claim:

l. An apparatus for drilling'large wells, comprising a rotatable pipe, a drill head secured to the lower end of said pipe and having a central hollow body portion with an integrally formed downwardly projecting stem, V-shaped drill points secured to the lower end of the stem, a shaft projecting through the stein above the drill points, rotatable cutters mounted on said shaft, a plurality of shafts projecting through the hol-` low central body portion of the head, rotatable cutters mounted on said shafts, tubular arms projecting from said body portion and having communication therewith, bearings at the ends of the arms for sa-idshafts, said arms having downwardly and outwardly directed openings and the central body portion having downwardly directed openings for discharging water therethrough.

2. An apparatus as per claim l in which l the lower end of the downwardly projecting stem is relatively narrow and substantially V-shaped with two similarly shaped cutting bits bolted thereto, each of said bits having an outwardly projecting cutting edge.

3. An apparatus as per claim l in which the shafts passing through the hollow central body portion are arranged atright angles to each other with one shaft in a plane slightly above the other shaft.

4;. A drill head of the character set forth comprising an elongated hollow body portion having four integrally formed outwardly projecting hollow arms with depending bearings at the outer end thereof, two shafts extending through said body portion at substantially ninety degrees to each other and securely fastened therein` and engaging respectively with pairs of said bearings, plurality of star-shaped cutters mounted on each of said shafts, the cutters on the lower shaft being of less diameter than the cutters on the upper shaft whereby they will all act on substantially the same plane, a pilot bit at the lower end of said body portion, said body portion and arms having openings for discharging water to the cutters and pilot bit.

5. In a drill of the character set forth,

the combination of a central cylindrical body closed at. its lower end and open at its upperV end, Vthe lower end having discharge holes' bearings andf'extending 'outwardlytherek from, star `shaped cuttersmounted'on said shaftsand` arranged in staggered' "relation= radially,1integrally'formed hollow arms projecting'joutwar'dly' from the body portion above 'the respective shafts and having `depending bearings .fori said shafts,-l discharge holes in -sai'dhollowf arms 'for 'discharging water downwardly and radially and guard members arranged above said arms.

6. A drill head comprising a body having outwardly projecting arms with bearings depending therefrom, shafts extending through said'body, each shaft engaging with a pair of said bearings, a plurality of rotatable cutters mountedy on each of said shafts, the cutters on one shaft being of less diameter than the cutters on the other shaft and proj ecting downwardly to substantially the same cutting plane as the cutters on the other sohzft, and a pilot bit on the lower end of said O y. y

7. 'A drill head comprisinga body portion, shafts projecting outwardly from said body portion at different distances from the lower end thereof and arranged in different vertical planes, aplurality ofstar shaped cutters rotatablymounted on each of said shafts, the points of said cutters being spaced apart a sufhcient distance so that they will strike blows when they engage with the material to be excavated, the cutters on the lower shaft being of sufficiently less diameter thanthe cutters on V'the upper shaft so that their lower engaging points will cut on substantially the same plane as the cutters on the upper shaft, another shaft carriedby said body below the first named shafts and projecting outwardly a less distance than the first named shafts, a plurality of cutters mounted on the last named shaft adjacent to the body portion and adapted to cut on a smaller diameter than the first named cutters, anda pilot bit at theV lower end of said body.

8. A drill head of the character set forth comprising anvelongated hollow body portion, two shafts extending throughsaid body portion at substantially ninety degrees Vto eachother and securely fastened therein, a plurality of cutters mounted oneach of said shafts, the cutters on the lower shaft being f less diameter than the cutters on the upper shaft, whereby'they will all act on substantially the same plane, a pilot bit at thelower :end of said body portion, said'body'portion CTI having ,openings for discharging water therefrom to the cutters and pilot bit.

9. In a drill of the character set forth, the combination of a central cylindrical body Closed at its lower end and open at its upper lend, an integrally formed stem'depending from the body, pilot bits secured to the lower end of the stem, star shaped cutters mounted on the vstern above the pilot bits and adapted to coact therewith to out a relatively small center hole, two bearings arranged at substantially right angles to each other and extending through the body, shafts mounted in said bearings and extending Voutwardly therefrom, and star shaped cutters mounted on said shafts, said body having discharge openings for discharging water therefrom.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2550202 *Aug 14, 1948Apr 24, 1951Robbins James SRock cutting apparatus
US2797065 *Jan 28, 1954Jun 25, 1957Houston John WDrilling head
US7392857Jan 3, 2007Jul 1, 2008Hall David RApparatus and method for vibrating a drill bit
US7419016Mar 1, 2007Sep 2, 2008Hall David RBi-center drill bit
US7419018Nov 1, 2006Sep 2, 2008Hall David RCam assembly in a downhole component
US7424922Mar 15, 2007Sep 16, 2008Hall David RRotary valve for a jack hammer
US7484576Feb 12, 2007Feb 3, 2009Hall David RJack element in communication with an electric motor and or generator
US7497279Jan 29, 2007Mar 3, 2009Hall David RJack element adapted to rotate independent of a drill bit
US7527110Oct 13, 2006May 5, 2009Hall David RPercussive drill bit
US7533737Feb 12, 2007May 19, 2009Hall David RJet arrangement for a downhole drill bit
US7559379Jul 14, 2009Hall David RDownhole steering
US7571780Sep 25, 2006Aug 11, 2009Hall David RJack element for a drill bit
US7591327Mar 30, 2007Sep 22, 2009Hall David RDrilling at a resonant frequency
US7600586Oct 13, 2009Hall David RSystem for steering a drill string
US7617886Nov 17, 2009Hall David RFluid-actuated hammer bit
US7661487Mar 31, 2009Feb 16, 2010Hall David RDownhole percussive tool with alternating pressure differentials
US7694756Oct 12, 2007Apr 13, 2010Hall David RIndenting member for a drill bit
US7721826Sep 6, 2007May 25, 2010Schlumberger Technology CorporationDownhole jack assembly sensor
US7762353Jul 27, 2010Schlumberger Technology CorporationDownhole valve mechanism
US7866416Jan 11, 2011Schlumberger Technology CorporationClutch for a jack element
US7886851Feb 15, 2011Schlumberger Technology CorporationDrill bit nozzle
US7900720Mar 8, 2011Schlumberger Technology CorporationDownhole drive shaft connection
US7954401Jun 7, 2011Schlumberger Technology CorporationMethod of assembling a drill bit with a jack element
US7967082Jun 28, 2011Schlumberger Technology CorporationDownhole mechanism
US7967083Jun 28, 2011Schlumberger Technology CorporationSensor for determining a position of a jack element
US8011457Sep 6, 2011Schlumberger Technology CorporationDownhole hammer assembly
US8020471Feb 27, 2009Sep 20, 2011Schlumberger Technology CorporationMethod for manufacturing a drill bit
US8122980Jun 22, 2007Feb 28, 2012Schlumberger Technology CorporationRotary drag bit with pointed cutting elements
US8130117Jun 8, 2007Mar 6, 2012Schlumberger Technology CorporationDrill bit with an electrically isolated transmitter
US8191651Mar 31, 2011Jun 5, 2012Hall David RSensor on a formation engaging member of a drill bit
US8201892Dec 10, 2007Jun 19, 2012Hall David RHolder assembly
US8205688Jun 24, 2009Jun 26, 2012Hall David RLead the bit rotary steerable system
US8215420Jul 10, 2012Schlumberger Technology CorporationThermally stable pointed diamond with increased impact resistance
US8225883Jul 24, 2012Schlumberger Technology CorporationDownhole percussive tool with alternating pressure differentials
US8240404Aug 14, 2012Hall David RRoof bolt bit
US8267196Sep 18, 2012Schlumberger Technology CorporationFlow guide actuation
US8281882May 29, 2009Oct 9, 2012Schlumberger Technology CorporationJack element for a drill bit
US8292372Oct 23, 2012Hall David RRetention for holder shank
US8297375Oct 30, 2012Schlumberger Technology CorporationDownhole turbine
US8297378Oct 30, 2012Schlumberger Technology CorporationTurbine driven hammer that oscillates at a constant frequency
US8307919Jan 11, 2011Nov 13, 2012Schlumberger Technology CorporationClutch for a jack element
US8316964Jun 11, 2007Nov 27, 2012Schlumberger Technology CorporationDrill bit transducer device
US8322796Dec 4, 2012Schlumberger Technology CorporationSeal with contact element for pick shield
US8333254Oct 1, 2010Dec 18, 2012Hall David RSteering mechanism with a ring disposed about an outer diameter of a drill bit and method for drilling
US8342266Mar 15, 2011Jan 1, 2013Hall David RTimed steering nozzle on a downhole drill bit
US8342611Dec 8, 2010Jan 1, 2013Schlumberger Technology CorporationSpring loaded pick
US8360174Jan 29, 2013Schlumberger Technology CorporationLead the bit rotary steerable tool
US8408336May 28, 2009Apr 2, 2013Schlumberger Technology CorporationFlow guide actuation
US8418784Apr 16, 2013David R. HallCentral cutting region of a drilling head assembly
US8434573Aug 6, 2009May 7, 2013Schlumberger Technology CorporationDegradation assembly
US8449040Oct 30, 2007May 28, 2013David R. HallShank for an attack tool
US8499857Nov 23, 2009Aug 6, 2013Schlumberger Technology CorporationDownhole jack assembly sensor
US8522897Sep 11, 2009Sep 3, 2013Schlumberger Technology CorporationLead the bit rotary steerable tool
US8528664Jun 28, 2011Sep 10, 2013Schlumberger Technology CorporationDownhole mechanism
US8540037Apr 30, 2008Sep 24, 2013Schlumberger Technology CorporationLayered polycrystalline diamond
US8550190Sep 30, 2010Oct 8, 2013David R. HallInner bit disposed within an outer bit
US8567532Nov 16, 2009Oct 29, 2013Schlumberger Technology CorporationCutting element attached to downhole fixed bladed bit at a positive rake angle
US8573331Oct 29, 2010Nov 5, 2013David R. HallRoof mining drill bit
US8590644Sep 26, 2007Nov 26, 2013Schlumberger Technology CorporationDownhole drill bit
US8596381Mar 31, 2011Dec 3, 2013David R. HallSensor on a formation engaging member of a drill bit
US8616305Nov 16, 2009Dec 31, 2013Schlumberger Technology CorporationFixed bladed bit that shifts weight between an indenter and cutting elements
US8622155Jul 27, 2007Jan 7, 2014Schlumberger Technology CorporationPointed diamond working ends on a shear bit
US8701799Apr 29, 2009Apr 22, 2014Schlumberger Technology CorporationDrill bit cutter pocket restitution
US8714285Nov 16, 2009May 6, 2014Schlumberger Technology CorporationMethod for drilling with a fixed bladed bit
US8820440Nov 30, 2010Sep 2, 2014David R. HallDrill bit steering assembly
US8839888Apr 23, 2010Sep 23, 2014Schlumberger Technology CorporationTracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
US8931854Sep 6, 2013Jan 13, 2015Schlumberger Technology CorporationLayered polycrystalline diamond
US8950517Jun 27, 2010Feb 10, 2015Schlumberger Technology CorporationDrill bit with a retained jack element
US9051795Nov 25, 2013Jun 9, 2015Schlumberger Technology CorporationDownhole drill bit
US9068410Jun 26, 2009Jun 30, 2015Schlumberger Technology CorporationDense diamond body
US9316061Aug 11, 2011Apr 19, 2016David R. HallHigh impact resistant degradation element
US20070119630 *Jan 29, 2007May 31, 2007Hall David RJack Element Adapted to Rotate Independent of a Drill Bit
US20070125580 *Feb 12, 2007Jun 7, 2007Hall David RJet Arrangement for a Downhole Drill Bit
US20070221408 *Mar 30, 2007Sep 27, 2007Hall David RDrilling at a Resonant Frequency
US20070221412 *Mar 15, 2007Sep 27, 2007Hall David RRotary Valve for a Jack Hammer
US20070229304 *Jun 8, 2007Oct 4, 2007Hall David RDrill Bit with an Electrically Isolated Transmitter
US20070272443 *Aug 10, 2007Nov 29, 2007Hall David RDownhole Steering
US20080035388 *Oct 12, 2007Feb 14, 2008Hall David RDrill Bit Nozzle
US20080142263 *Feb 28, 2008Jun 19, 2008Hall David RDownhole Valve Mechanism
US20080156536 *Jan 3, 2007Jul 3, 2008Hall David RApparatus and Method for Vibrating a Drill Bit
US20080173482 *Mar 28, 2008Jul 24, 2008Hall David RDrill Bit
US20080296015 *Jun 4, 2007Dec 4, 2008Hall David RClutch for a Jack Element
US20080302572 *Jul 23, 2008Dec 11, 2008Hall David RDrill Bit Porting System
US20080314647 *Jun 22, 2007Dec 25, 2008Hall David RRotary Drag Bit with Pointed Cutting Elements
US20090000828 *Sep 10, 2008Jan 1, 2009Hall David RRoof Bolt Bit
US20090057016 *Oct 31, 2008Mar 5, 2009Hall David RDownhole Turbine
US20090065251 *Sep 6, 2007Mar 12, 2009Hall David RDownhole Jack Assembly Sensor
US20090158897 *Feb 27, 2009Jun 25, 2009Hall David RJack Element with a Stop-off
US20090183919 *Jul 23, 2009Hall David RDownhole Percussive Tool with Alternating Pressure Differentials
US20090255733 *Jun 24, 2009Oct 15, 2009Hall David RLead the Bit Rotary Steerable System
US20100059289 *Mar 11, 2010Hall David RCutting Element with Low Metal Concentration
US20100089648 *Nov 16, 2009Apr 15, 2010Hall David RFixed Bladed Bit that Shifts Weight between an Indenter and Cutting Elements
US20100264721 *Apr 16, 2009Oct 21, 2010Hall David RSeal with Rigid Element for Degradation Assembly
US20110042150 *Oct 29, 2010Feb 24, 2011Hall David RRoof Mining Drill Bit
US20110048811 *Jun 27, 2010Mar 3, 2011Schlumberger Technology CorporationDrill bit with a retained jack element
US20110180324 *Jul 28, 2011Hall David RSensor on a Formation Engaging Member of a Drill Bit
US20110180325 *Jul 28, 2011Hall David RSensor on a Formation Engaging Member of a Drill Bit
USD620510Jul 27, 2010Schlumberger Technology CorporationDrill bit
USD674422Jan 15, 2013Hall David RDrill bit with a pointed cutting element and a shearing cutting element
USD678368Mar 19, 2013David R. HallDrill bit with a pointed cutting element
WO1996023954A1 *Mar 22, 1995Aug 8, 1996England Richard JSpherical reaming bit
U.S. Classification175/335, 175/391, 175/358, 175/339, 299/81.1, 175/206
International ClassificationE21B10/08, E21B10/28, E21B21/00, E21B21/06, E21B10/12, E21B10/26, E21B10/16
Cooperative ClassificationE21B10/12, E21B21/06, E21B21/00, E21B10/28, E21B10/16
European ClassificationE21B10/16, E21B10/12, E21B21/00, E21B21/06, E21B10/28