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Combination rolling and scraping cutter drill

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Publication number
US1874066A
US1874066A US44785130A US1874066A US 1874066 A US1874066 A US 1874066A US 44785130 A US44785130 A US 44785130A US 1874066 A US1874066 A US 1874066A
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Prior art keywords
cutters
blade
rolling
cutting
head
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Expired - Lifetime
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Floyd L Scott
Irvin H Bettis
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Floyd L Scott
Irvin H Bettis
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/08Roller bits
    • E21B10/14Roller bits combined with non-rolling cutters other than of leading-portion type

Description

Aug. 30, 1932. F. 1.. SCOTT ET AL COMBINATION ROLLING AND SC RAPING CUTTER DRILL Filed April 28, 1950 Patented Au 30, 1932 FLOYD L. SCOTT AND IRVIN H. BETTIS, OF HOUSTON,

COMBINATION ROLLING AND SCBAPING CUTTER DRILL Application med April 2a, 1930. sen ing. 447,851.

Our invention relates to cutters for earth boring drills.

In drilling deep wells for oil, gas, sulphur and the like, it is almost impossible to con- 6 struct a drill having cutters thereon which are Well adapted for drilling both soft and hard formations. The best type of cutter for soft formations is the scraping cutter, while the most effective drill for hard formations is a 10 rolling cutterhaving teeth which penetrate and chip the rock and disintegrate it so that it may be washed to the surface by the flushing fluid. There are formations, particularly formations which are gummy and plastic, in 1 which rollin cutters simply make depressions or trac s in the material but do not cause it to chip or crumble so that it may be carried away by the flushing fluid.

In the formations of this character where 29 the material is not broken up by the rolling cutters, it is found that the opposite rolling cutters make depressions in the bottom of the hole, and the material forms waves or is bulged up in front of the cutters as they travel around on the bottom of the hole. Little progress is made in this type of formation,

and as a rule the bit hasto= be withdrawn, and a scraping cutter substituted for the rolling cutters.

' It is an object of our inventionto provide an earth boring drill having thereon both scraping and rolling cutters, whereby all types of formation may be cut by the drill without the necessity of withdrawing the bit from the hole until it becomes necessary to do so due to the dulling of the cutters.

A further object is to provide a cutting blade which may be employed with the bits having rolling cutters, thereon of ordinary structure. It is also desired to provide a cutting blade to be used with rolling cutters and in which the blade may be easily held in place and removed when desired.

It is also an object to provide a cutting blade so formed as to interfit in the desired position between rolling cutters such as are now used and to move the material cut thereby upwardly away from the rolling cutters, thus allowing rolling cutters to drill upon uncut surface. 1.

We also desire to mount the cutting blade so as not to project materially in advance of the rolling cutters but to place the same so that the blade will engage the material bulg-. ing up between the rolling cutters.

In the drawing herewith Fig. 1 is a side view of a cutting blade embodying our invention, said blade being shown in position in a longitudinally divided drill head with one side of the head removed.

Fig. 2 is a side elevation of a drill bit having our invention thereon, said view being taken at right angles to the view shown in Fig. 1. p

Fig. 3 is a top plan view of the cutting" 85 blade, therolling cutters and the wall of the hole being shown diagrammatically.

Fig. 4 is a view intended to illustrate the operation of the cutting blade relative to the rolling cutters.

We contemplate employing a cutting blade in connection with rolling cutters of different structure, but preferably with the type of bit known as the cone bit where the cutters are approximately'conical in shape. Witht: reference particularly to Fig. 2, the lower end of the drill bit head 1 is shown, said head being divided along the plane indicated at 2. The two parts of the head are held together particularly by'means of thru-bolts 3," one on each side of the center of the head. The lower end of the head is formed with diverging faces 4, forming a slot or recess of inverted V shape. On the diverging faces 4 are mounted the two rolling cutters 5. This structure is well known in the art and need not be further described. I

The two rolling cutters 5 are spaced apart to allow free rolling motion of the two cutters. We employ a scraping blade 6 adapted to be mounted in the head and between the r two sides of the headthereof as shown in the drawing. The blade 6 may be the full diameter of the hole, although it is preferv ably slightly less in width than the diameter "-3 of the hole as is indicated in Fig. 3. The upper end of the blade is formed with a neck 7, and the head is recessed at 8 to receive this neck or shank. Adjacent the uppenend "of the neck is formed a half round circumferential groove 9 into which the thru-bolts 3 may be engaged to hold the blade securely in position. The lower side of the blade is formed with an opening or recess indicated generally at 10. The shape of this recess is curved and is widened slightly away from the lower end to fit between the adjacent cutters but to avoid contact therewith.. On the advancing side of the blade, the margin of the opening 10 is beveled forwardly and outwardly at 11 to form a deflecting surface which tends to move the material cut by the blade upwardly andaway from the rolling cutters.

. As will be seen from Fig. 2, the forward face of the blade is also extended rearwardly and u wardly at 12 to assist in'carrying the material up away from the lower edge. The rearward side is curved forwardly toward the lower end to provide a cutting edge 13.

The shank 7 of the blade is tubular and of sufficient size to fit about the lower end of the water tube 14, which conducts the flushing fluid. Below the end of said tube, the interior of said shank is widened slightly and flattened to allow the fluid to issue at the upper end of the opening 10 of the blade. WVe have widened the outer ends of the discharge opening as shown at 15, said enlarged openings bein connected by a slot 16. The flushing uid is thereby discharged between the rolling outters and downwardly against the forward edges of the cutting blades.

As will be seen from Fig. 3, the blade is set at a slight angle from the division plane 2 between the halves of the head. This is to provide for the inclination necessary for moving the material upwardly away'from the cutting edges of the blade. The upper shoulder 17 of the blade is received between the lower ends of the head in such manner as to form a wedging fit therewith to assist in holding the blade rigidly in position.

In the operation of the drill thus construced, the cutting blade will act in ordinarily hard formations to scrape up the material disintegrated by the rolling cutters; but in soft and gummy formations, the two sides of. the cutting blade willin the rotation of the head precede the rolling cutters, and the material which is bulged up in front of said cutters will be engaged by the blade end which will act to scrape off this-material between the cutters and move it upwardly out ofthe way as shown in Fig. 1, where the flushing fluid .may carry it to the surface. Each rolling cutter will therefore move on to an uncut surface such as is'indicated at 18 and be allowed to engage therewith to mash it up, loosening it from the cohering material below as the cutterfpasses over the surface left by the blade. The formation engaged by the cutting teeth will be extruded 5 upwardly behind the cutter as shown at 19 in Fig. 4 in such manner that the cutting blade following will engage therewith and scrape off a cutting in the manner shown. Even where the material is not so lastic, and the rolling cutters merely form d e dentations in the formations, the ridges between said indentations will be engaged by the blade and'move upwardly away from the bottom.

It is to be noted that the best results are obtained when the cutting blade is slightl to the rear of the forward sides of the rol ing cutters, but while this is a preferred positlon for the cutters we do not wish to be confined to this positioning thereof; but it is obvious that the cutting blade should not extend materially in advance of the rolling cutters if satisfactory results are to be obtained.

The advantages of this construction lie in the fact that the combination of cutters .adapts the drill for use in all kinds of formations, and in some formations in particular, the combination of rolling and scraping cutters allows the drill to cut more rapidly than either rolling cutters alone or scraping cutters alone could operate. Also while we have shown one integral cutting blade, it is to be understood that this scraping cutter could be made in more than one piece to position the scraping edges at the desired posiblade between said cutters, a shank on said blade fitting within a recess in said head, a clrcumferential groove on said shank, and

ep inthru-bolts extending through said head and into said groove to secure said sections and said blade in operative position.

3. A rotary earth-boring drill, including a head longitudinally divided into two sections, roller cutters on said head, a scraping blade between said cutters, a shank on saidblade fitting within a recess in said head, a circumferential groove on said shank, and thru-bolts extending through said head and into said groove to secure said sections and said blade in operative position, said shank having a central water course therein.

In testimony whereof, we hereunto affix our signatures, this the 2nd day of April,

FLOYD L. SCOTT.

IRVIN H. BETTIS.

US1874066A 1930-04-28 1930-04-28 Combination rolling and scraping cutter drill Expired - Lifetime US1874066A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614810A (en) * 1947-06-16 1952-10-21 Reed Roller Bit Co Rotary bit
US3148741A (en) * 1960-12-08 1964-09-15 Timken Roller Bearing Co Drill bit and fastening means
US20080264695A1 (en) * 2007-04-05 2008-10-30 Baker Hughes Incorporated Hybrid Drill Bit and Method of Drilling
US20080296068A1 (en) * 2007-04-05 2008-12-04 Baker Hughes Incorporated Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US20090126998A1 (en) * 2007-11-16 2009-05-21 Zahradnik Anton F Hybrid drill bit and design method
US20090272582A1 (en) * 2008-05-02 2009-11-05 Baker Hughes Incorporated Modular hybrid drill bit
US20100018777A1 (en) * 2008-07-25 2010-01-28 Rudolf Carl Pessier Dynamically stable hybrid drill bit
US20100025119A1 (en) * 2007-04-05 2010-02-04 Baker Hughes Incorporated Hybrid drill bit and method of using tsp or mosaic cutters on a hybrid bit
US20100104736A1 (en) * 2008-10-23 2010-04-29 Baker Hughes Incorporated Method and apparatus for automated application of hardfacing material to drill bits
US20100106285A1 (en) * 2008-10-29 2010-04-29 Massey Alan J Method and apparatus for robotic welding of drill bits
US20100155145A1 (en) * 2008-12-19 2010-06-24 Rudolf Carl Pessier Hybrid drill bit with secondary backup cutters positioned with high side rake angles
US20100159157A1 (en) * 2008-10-23 2010-06-24 Stevens John H Robotically applied hardfacing with pre-heat
US20100155146A1 (en) * 2008-12-19 2010-06-24 Baker Hughes Incorporated Hybrid drill bit with high pilot-to-journal diameter ratio
US20100181292A1 (en) * 2008-12-31 2010-07-22 Baker Hughes Incorporated Method and apparatus for automated application of hardfacing material to rolling cutters of hybrid-type earth boring drill bits, hybrid drill bits comprising such hardfaced steel-toothed cutting elements, and methods of use thereof
US20100181116A1 (en) * 2009-01-16 2010-07-22 Baker Hughes Incororated Impregnated drill bit with diamond pins
US20100224417A1 (en) * 2009-03-03 2010-09-09 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US20100270085A1 (en) * 2009-04-28 2010-10-28 Baker Hughes Incorporated Adaptive control concept for hybrid pdc/roller cone bits
US20100288561A1 (en) * 2009-05-13 2010-11-18 Baker Hughes Incorporated Hybrid drill bit
US20100320001A1 (en) * 2009-06-18 2010-12-23 Baker Hughes Incorporated Hybrid bit with variable exposure
US20110079443A1 (en) * 2009-10-06 2011-04-07 Baker Hughes Incorporated Hole opener with hybrid reaming section
US20110079440A1 (en) * 2009-10-06 2011-04-07 Baker Hughes Incorporated Hole opener with hybrid reaming section
US20110079444A1 (en) * 2009-09-16 2011-04-07 Baker Hughes Incorporated External, Divorced PDC Bearing Assemblies for Hybrid Drill Bits
US8950514B2 (en) 2010-06-29 2015-02-10 Baker Hughes Incorporated Drill bits with anti-tracking features
US8978786B2 (en) 2010-11-04 2015-03-17 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit
WO2015022065A3 (en) * 2013-08-15 2015-10-22 Herrenknecht Ag Drill head for expanding a pilot bore in order to create a borehole
US9353575B2 (en) 2011-11-15 2016-05-31 Baker Hughes Incorporated Hybrid drill bits having increased drilling efficiency
US9476259B2 (en) 2008-05-02 2016-10-25 Baker Hughes Incorporated System and method for leg retention on hybrid bits
US9782857B2 (en) 2011-02-11 2017-10-10 Baker Hughes Incorporated Hybrid drill bit having increased service life

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614810A (en) * 1947-06-16 1952-10-21 Reed Roller Bit Co Rotary bit
US3148741A (en) * 1960-12-08 1964-09-15 Timken Roller Bearing Co Drill bit and fastening means
US20080264695A1 (en) * 2007-04-05 2008-10-30 Baker Hughes Incorporated Hybrid Drill Bit and Method of Drilling
US20080296068A1 (en) * 2007-04-05 2008-12-04 Baker Hughes Incorporated Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US7841426B2 (en) 2007-04-05 2010-11-30 Baker Hughes Incorporated Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US7845435B2 (en) 2007-04-05 2010-12-07 Baker Hughes Incorporated Hybrid drill bit and method of drilling
US20100025119A1 (en) * 2007-04-05 2010-02-04 Baker Hughes Incorporated Hybrid drill bit and method of using tsp or mosaic cutters on a hybrid bit
US20090126998A1 (en) * 2007-11-16 2009-05-21 Zahradnik Anton F Hybrid drill bit and design method
US8678111B2 (en) 2007-11-16 2014-03-25 Baker Hughes Incorporated Hybrid drill bit and design method
US9476259B2 (en) 2008-05-02 2016-10-25 Baker Hughes Incorporated System and method for leg retention on hybrid bits
US20090272582A1 (en) * 2008-05-02 2009-11-05 Baker Hughes Incorporated Modular hybrid drill bit
US8356398B2 (en) 2008-05-02 2013-01-22 Baker Hughes Incorporated Modular hybrid drill bit
US20110120269A1 (en) * 2008-05-02 2011-05-26 Baker Hughes Incorporated Modular hybrid drill bit
US7819208B2 (en) 2008-07-25 2010-10-26 Baker Hughes Incorporated Dynamically stable hybrid drill bit
US20100018777A1 (en) * 2008-07-25 2010-01-28 Rudolf Carl Pessier Dynamically stable hybrid drill bit
US8450637B2 (en) 2008-10-23 2013-05-28 Baker Hughes Incorporated Apparatus for automated application of hardfacing material to drill bits
US8969754B2 (en) 2008-10-23 2015-03-03 Baker Hughes Incorporated Methods for automated application of hardfacing material to drill bits
US20100159157A1 (en) * 2008-10-23 2010-06-24 Stevens John H Robotically applied hardfacing with pre-heat
US20100104736A1 (en) * 2008-10-23 2010-04-29 Baker Hughes Incorporated Method and apparatus for automated application of hardfacing material to drill bits
US9439277B2 (en) 2008-10-23 2016-09-06 Baker Hughes Incorporated Robotically applied hardfacing with pre-heat
US9580788B2 (en) 2008-10-23 2017-02-28 Baker Hughes Incorporated Methods for automated deposition of hardfacing material on earth-boring tools and related systems
US20100106285A1 (en) * 2008-10-29 2010-04-29 Massey Alan J Method and apparatus for robotic welding of drill bits
US8948917B2 (en) 2008-10-29 2015-02-03 Baker Hughes Incorporated Systems and methods for robotic welding of drill bits
US8047307B2 (en) 2008-12-19 2011-11-01 Baker Hughes Incorporated Hybrid drill bit with secondary backup cutters positioned with high side rake angles
US20100155146A1 (en) * 2008-12-19 2010-06-24 Baker Hughes Incorporated Hybrid drill bit with high pilot-to-journal diameter ratio
US20100155145A1 (en) * 2008-12-19 2010-06-24 Rudolf Carl Pessier Hybrid drill bit with secondary backup cutters positioned with high side rake angles
US20100181292A1 (en) * 2008-12-31 2010-07-22 Baker Hughes Incorporated Method and apparatus for automated application of hardfacing material to rolling cutters of hybrid-type earth boring drill bits, hybrid drill bits comprising such hardfaced steel-toothed cutting elements, and methods of use thereof
US8471182B2 (en) 2008-12-31 2013-06-25 Baker Hughes Incorporated Method and apparatus for automated application of hardfacing material to rolling cutters of hybrid-type earth boring drill bits, hybrid drill bits comprising such hardfaced steel-toothed cutting elements, and methods of use thereof
US20100181116A1 (en) * 2009-01-16 2010-07-22 Baker Hughes Incororated Impregnated drill bit with diamond pins
US8141664B2 (en) * 2009-03-03 2012-03-27 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US20100224417A1 (en) * 2009-03-03 2010-09-09 Baker Hughes Incorporated Hybrid drill bit with high bearing pin angles
US8056651B2 (en) 2009-04-28 2011-11-15 Baker Hughes Incorporated Adaptive control concept for hybrid PDC/roller cone bits
US20100270085A1 (en) * 2009-04-28 2010-10-28 Baker Hughes Incorporated Adaptive control concept for hybrid pdc/roller cone bits
US9670736B2 (en) 2009-05-13 2017-06-06 Baker Hughes Incorporated Hybrid drill bit
US20100288561A1 (en) * 2009-05-13 2010-11-18 Baker Hughes Incorporated Hybrid drill bit
US8459378B2 (en) 2009-05-13 2013-06-11 Baker Hughes Incorporated Hybrid drill bit
US8336646B2 (en) 2009-06-18 2012-12-25 Baker Hughes Incorporated Hybrid bit with variable exposure
US8157026B2 (en) 2009-06-18 2012-04-17 Baker Hughes Incorporated Hybrid bit with variable exposure
US20100320001A1 (en) * 2009-06-18 2010-12-23 Baker Hughes Incorporated Hybrid bit with variable exposure
US20110079444A1 (en) * 2009-09-16 2011-04-07 Baker Hughes Incorporated External, Divorced PDC Bearing Assemblies for Hybrid Drill Bits
US9556681B2 (en) 2009-09-16 2017-01-31 Baker Hughes Incorporated External, divorced PDC bearing assemblies for hybrid drill bits
US9004198B2 (en) 2009-09-16 2015-04-14 Baker Hughes Incorporated External, divorced PDC bearing assemblies for hybrid drill bits
US8347989B2 (en) 2009-10-06 2013-01-08 Baker Hughes Incorporated Hole opener with hybrid reaming section and method of making
US20110079443A1 (en) * 2009-10-06 2011-04-07 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8191635B2 (en) 2009-10-06 2012-06-05 Baker Hughes Incorporated Hole opener with hybrid reaming section
US20110079440A1 (en) * 2009-10-06 2011-04-07 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8448724B2 (en) 2009-10-06 2013-05-28 Baker Hughes Incorporated Hole opener with hybrid reaming section
US20110079441A1 (en) * 2009-10-06 2011-04-07 Baker Hughes Incorporated Hole opener with hybrid reaming section
US8950514B2 (en) 2010-06-29 2015-02-10 Baker Hughes Incorporated Drill bits with anti-tracking features
US9657527B2 (en) 2010-06-29 2017-05-23 Baker Hughes Incorporated Drill bits with anti-tracking features
US8978786B2 (en) 2010-11-04 2015-03-17 Baker Hughes Incorporated System and method for adjusting roller cone profile on hybrid bit
US9782857B2 (en) 2011-02-11 2017-10-10 Baker Hughes Incorporated Hybrid drill bit having increased service life
US9353575B2 (en) 2011-11-15 2016-05-31 Baker Hughes Incorporated Hybrid drill bits having increased drilling efficiency
WO2015022065A3 (en) * 2013-08-15 2015-10-22 Herrenknecht Ag Drill head for expanding a pilot bore in order to create a borehole

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