US20170101867A1 - Axially compressive degradation picks and holders - Google Patents
Axially compressive degradation picks and holders Download PDFInfo
- Publication number
- US20170101867A1 US20170101867A1 US15/293,275 US201615293275A US2017101867A1 US 20170101867 A1 US20170101867 A1 US 20170101867A1 US 201615293275 A US201615293275 A US 201615293275A US 2017101867 A1 US2017101867 A1 US 2017101867A1
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- holder
- shank
- axially
- bore
- degradation
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- 230000015556 catabolic process Effects 0.000 title claims abstract description 35
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 35
- 238000009434 installation Methods 0.000 abstract description 29
- 230000014759 maintenance of location Effects 0.000 abstract description 7
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
- E21C35/193—Means for fixing picks or holders using bolts as main fixing elements
- E21C35/1933—Means for fixing picks or holders using bolts as main fixing elements the picks having a cylindrical shank
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
- E21C35/191—Means for fixing picks or holders for fixing holders
Definitions
- Degradation picks are known to be used in such fields as road milling, mining, and trenching to engage and degrade tough materials such as asphalt, concrete, and rock.
- such degradation picks may be secured to an exterior of a rotatable drum or continuous chain so as to be repeatedly brought into contact with a surface of a material to be degraded.
- Degradation picks are known to take several forms.
- One form of degradation pick as described in U.S. Pat. No. 7,396,086 to Hall, et al., comprises a shank attached to a base of a steel body.
- a cemented metal carbide core with an impact tip comprising a diamond material may be press fit into the steel body opposite the shank.
- the shank may be secured within a holder or block attached to a milling drum leaving the impact tip exposed.
- Such degradation picks and holders may dislodge from their respective bore holes due to the repeated impact forces experienced while in use. Also, it is often necessary to replace degradation picks as they wear which can be a dangerous, time consuming and expensive process. Consequently, efforts have been made to provide more secure connections between degradation pick and holder shanks and bore holes that may also allow for quick removal and replacement.
- U.S. Pat. Pub. No. 2011/0254349 to Hall et al. describes a pick assembly comprising a pick shank configured to be press fit in a bore within a block.
- the shank comprises at least one longitudinal recess extending along the shank from a distal end of the shank. The recess allows the shank to resiliently collapse upon insertion into the bore while maintaining a press fit between the bore and the shank.
- a degradation pick or holder shank for facilitating installation, retention and removal is disclosed.
- the shank may comprise an axially compressive portion that may contract radially when stretched axially and then expand again radially when released.
- An installation tool may be used to stretch the shank axially during insertion into a bore and then release the shank to retain it within the bore.
- Such a shank may comprise at least one compliant region comprising an axially-variable cross section.
- the axially-variable cross section may comprise a bellows shape, an accordion shape, or other shapes to facilitate compliance.
- a machining tool may be inserted to machine crevices into an interior of a shank.
- a shank of a degradation pick or holder may be inserted into a bore disposed within a holder or block wherein an installation tool may pull a distal end of the shank further into the bore. Pulling the distal end further into the bore may cause axial expansion within the shank and radial contraction within the compliant region. When the installation tool is withdrawn, the compliant region may expand radially to secure the shank within the bore.
- FIG. 1 illustrates an embodiment of a formation degradation machine.
- FIG. 2 illustrates a rotatable drum
- FIGS. 3 a -3 b illustrate a degradation pick, according to an embodiment of the invention.
- FIG. 4 a -4 b illustrate a holder, according to an embodiment of the invention.
- FIG. 5 a -5 b illustrate a perspective cross-sectional view of an embodiment of a holder.
- FIG. 6 a - d illustrates a perspective cross-sectional views of embodiments of a holder.
- FIG. 7 illustrates a perspective cross-sectional views of embodiments of a holder.
- FIG. 8 illustrates a perspective cross-sectional views of embodiments of a holder.
- FIG. 9 illustrates a perspective partially cross-sectional view of another embodiment of a holder.
- FIG. 10 illustrates a perspective cross-sectional view of embodiments of a portion of a holder.
- FIG. 11 a -11 b illustrates a perspective cross-sectional views of embodiments of a compliant region.
- FIG. 12 a - c illustrates a perspective cross-sectional views of various embodiments of installation tools.
- FIG. 13 illustrates a perspective cross-sectional view of an embodiment of a pick.
- FIG. 1 shows an embodiment of a formation degradation machine 1000 comprising a plurality of degradation picks 1100 secured to an exterior of a rotatable drum 1200 .
- Rotation of the rotatable drum 1200 by the formation degradation machine 1000 may bring the degradation picks 1100 repeadedly into contact with a surface of a material 1300 .
- This repeated engagement of the degradation picks 1100 to the material 1300 may degrade the material 1300 causing it to break up into aggregate 1301 .
- the formation degradation machine 1000 is located in an underground mine and the material 1300 to be degraded, coal for example, is contained in a wall of the mine. Once a portion of the material 1300 is degraded into aggregate 1301 it may be captured by a conveyor 1001 and removed for processing.
- While the embodiment shown depicts a rotatable drum 1200 on a formation degradation machine as part of a mining operation, it should be understood that the present invention may also be used in conjunction with rotatable drums or continuous chains being used in mining, road milling, trenching or other operations where it is desirable to degrade tough materials such as asphalt, concrete or rock.
- FIG. 2 shows an embodiment of a rotatable drum 2200 as seen by a material to be degraded.
- a plurality of blocks 2201 may be disposed around an exterior of the rotatable drum 2200 .
- Each of the blocks 2201 may have a bore disposed therein to receive a shaft 2101 from each of a plurality of degradation picks 2100 .
- Rotation of the rotatable drum 2200 may cause the degradation picks 2100 to engage and degrade a material.
- the blocks 2201 may be positioned around the exterior of the rotatable drum 2200 to optimize degradation and/or transport aggregate away from the material being degraded.
- FIG. 3 a shows a perspective view of an embodiment of a degradation pick 3100 a and a pick block 3201 a.
- the degradation pick may comprise a shank 3101 a that may be inserted into a bore 3202 a of the pick block 3201 a.
- FIG. 3 b shows a perspective view of an embodiment of a degradation pick 3100 b, a holder 3400 b, and a pick block 3201 b.
- the pick block 3201 b may comprise a bore 3202 b for receiving a shaft 3401 b of the holder 3400 b.
- the holder 3400 b may comprise a hole 3402 b for receiving a shank 3101 b of the degradation pick 3100 b.
- Different holders may comprise bores of various diameters so as to accommodate degradation picks of various sizes to attach to a degradation drum (shown in FIG. 1 ).
- FIG. 4 a discloses a perspective view of an embodiment of a holder 100 a.
- the holder 100 a may comprise a body 101 a attached to a shank 111 a.
- the shank 111 a may comprise a compliant region 110 a with an axially-variable cross section.
- the compliant region 110 a comprises a bellows shape.
- the compliant region 110 a may radially compress facilitating entry into the bore.
- FIG. 4 b discloses a perspective cross-sectional view of another embodiment of a holder 100 b comprising a body 101 b and shank 111 b.
- a compliant region 110 b with a bellows shape may comprise a thin wall 112 b that may flex when subjected to radial or axial compression or expansion.
- FIG. 5 a discloses a perspective cross-sectional view of an embodiment of a holder 200 a and a block 220 a.
- the holder 200 a may comprise a shank 211 a with a compliant region 210 a shaped to fit within a bore 221 a of the block 220 a.
- a bellows shape of the compliant region 210 a may comprise a radius 212 a, wherein the radius 212 a may compress when urged into the bore 221 a. Due to a tapering 222 a of the bore 221 a, the radius 212 a may compress further when the holder 200 a is urged into the bore 221 a of the block 220 a, as shown in FIG. 5 b.
- FIG. 5 b discloses a perspective cross-sectional view of an embodiment of a holder 200 b inserted into a bore 221 b within a block 220 b.
- An internal radius of the bore 221 b may be narrower than an external radius 212 b of a compliant region 210 b of the holder 200 b when not disposed within the bore 221 b (as shown in FIG. 5 a ).
- the external radius 212 b of the compliant region 210 b may contract when urged into the bore 221 b. Contraction of the radius 212 b may cause the holder 200 b to elongate along a central axis 202 b thereof, enabling the holder 200 b to extend farther into the bore 221 b.
- FIGS. 6 a through 6 d are perspective cross-sectional views of embodiments of holders comprising compliant regions of various geometries.
- a holder 300 a has a compliant region 310 a comprising a pleat 313 a that creates additional surface area allowing for more axial expansion when inserted into a bore (shown in FIG. 5 ).
- another embodiment of a compliant region 310 b comprises a sharp accordion shape 314 b with three pleats 315 b.
- Another embodiment shown in FIG. 6 c comprises a compliant region 310 c comprising a smooth accordion shape 316 c comprising three pleats 315 c.
- a compliant region 310 d comprises a barbed shape 317 d comprising three pleats 315 d.
- Each of these various geometries may contribute to compliance.
- FIG. 7 discloses a perspective cross-sectional view of an embodiment of a holder 400 comprising a shank 401 with a compliant region 410 .
- the compliant region 410 may comprise a barbed shape 417 with one or more pleats 415 .
- a distal end 402 of the shank 401 may comprise a threaded portion 403 , wherein threaded components (shown in FIG. 9 ) for holder installation and removal may be utilized.
- FIG. 8 discloses a perspective cross-sectional view of a holder 500 disposed in a bore 521 within a block 520 .
- An installation tool 540 such as a bolt, may be inserted through a hole 504 in a front portion of the holder 500 .
- the installation tool 540 may pass through a compliant region 510 and apply pressure to a barrier 505 on a distal end of a shank of the holder 500 .
- the installation tool 540 may be pressed against the barrier 505 by, for example, a hammer (not shown), whereby the holder 500 may elongate axially while the compliant region 510 is compressed radially to facilitate installation.
- the holder 500 may retract axially while the compliant region 510 expands radially to facilitate retention of the holder 500 within the bore 521 .
- pressure may again be applied to the barrier 505 by the installation tool 540 to radially constrict the compliant region 510 while the holder 500 is withdrawn.
- FIG. 9 discloses a perspective partially cross-sectional view of another embodiment of a holder 600 disposed in a bore 621 within a block 620 .
- An installation tool 640 with a threaded end 641 may be inserted through a hole 604 and a compliant region 610 of the holder 600 whereby the threaded end 641 may be secured to a threaded portion 603 at a distal end of the holder 600 .
- the installation tool 640 may apply pressure against the threaded portion 603 which may radially constrict the compliant region 610 to facilitate installation.
- the compliant region 610 may radially expand to facilitate retention of the holder 600 within the bore 621 .
- pressure may again be applied to the threaded portion 603 by the installation tool 640 while the holder 600 is withdrawn.
- FIG. 10 discloses a perspective cross-sectional view of embodiments of a portion of a holder 700 comprising a compliant region juxtaposed with a portion of a holder 750 lacking a compliant region, both disposed in a bore within a block 720 .
- the holder 700 comprising the compliant region may extend further into the block 720 than the holder 750 without the compliant region.
- FIGS. 11 a and 11 b discloses perspective cross-sectional views of embodiments of a compliant region 810 a, 810 b comprising a sharp accordion shape 814 a, 814 b.
- a machine tool 850 a, 850 b may be inserted into an opening 819 a, 819 b to machine an interior thereof.
- FIGS. 12 a through 12 c disclose perspective cross-sectional views of various embodiments of installation tools.
- FIG. 12 a shows a holder 900 a disposed in a bore within a block 920 a.
- the holder 900 a may comprise a threaded portion 906 a disposed within the holder 900 a for receiving a threaded end of an installation tool 940 a.
- the installation tool 940 a may be inserted through a compliant region 910 a and into the threaded portion 906 a. In this configuration, the installation tool 940 a may axially compress the compliant region 910 a expanding it radially to help retain the holder 900 a within the block 920 a.
- FIG. 12 b shows a holder 900 b disposed in a bore within a block 920 b.
- the holder 900 b may comprise a threaded portion 906 b disposed within the holder 900 b mating with a threaded part of an installation tool 940 b.
- the installation tool 940 b may pass through the threaded portion 906 b and press against a barrier 905 b on a distal end of the holder 900 b causing a compliant region 910 b disposed between the threaded portion 906 b and barrier 905 b to expand axially. This axially expansion may radially constrict the compliant region aiding in installation or removal of the holder 900 b.
- FIG. 12 c shows a holder 900 c disposed in a bore within a block 920 c.
- the holder 900 c may comprise a hole 904 c running therethrough to a compliant region 907 c.
- An retention tool 940 c may be disposed in the hole 904 c and thread into a threaded portion 903 c disposed at a distal end of the holder 900 c. By so doing, the retention tool 940 c may axially compress the compliant region 907 c causing it to expand radially and aiding in retaining the holder 900 c within the block 920 c. In this embodiment, the retention tool 940 c may remain with the holder 900 c until removal.
- FIG. 13 discloses a perspective cross-sectional view of a pick 4100 disposed directly in a bore within a block 4120 without the use of a holder.
- the pick 4100 may comprise a body 4101 attached to a shank 4160 .
- the shank 4160 comprises a compliant region 4110 wherein axial and radial expansion or contraction may occur.
- the shank 4160 may further comprise a threaded hole 4106 disposed therein for receiving an installation tool 4140 .
- the installation tool 4140 may be inserted through the compliant region 4110 and into the threaded hole 4106 and may axially compress the compliant region 4110 causing it to expand radially to aid in retaining the pick 4100 .
- unthreading the installation tool 4140 may allow the compliant region to axially expand and radially contract allowing for removal of the pick 4100 .
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- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A degradation pick or holder shank for facilitating installation, retention and removal is disclosed. The shank may comprise an axially compressive portion that may contract radially when stretched axially and then expand again radially when released. An installation tool may be used to stretch the shank axially during insertion into a bore and then release the shank to retain it within the bore.
Description
- This application claims priority to and the benefit of U.S. Provisional Application Ser. No. 62/240,932, filed Oct. 13, 2015, the disclosure of which is incorporated by reference.
- Degradation picks are known to be used in such fields as road milling, mining, and trenching to engage and degrade tough materials such as asphalt, concrete, and rock. In use, such degradation picks may be secured to an exterior of a rotatable drum or continuous chain so as to be repeatedly brought into contact with a surface of a material to be degraded.
- Degradation picks are known to take several forms. One form of degradation pick, as described in U.S. Pat. No. 7,396,086 to Hall, et al., comprises a shank attached to a base of a steel body. A cemented metal carbide core with an impact tip comprising a diamond material may be press fit into the steel body opposite the shank. The shank may be secured within a holder or block attached to a milling drum leaving the impact tip exposed.
- Such degradation picks and holders may dislodge from their respective bore holes due to the repeated impact forces experienced while in use. Also, it is often necessary to replace degradation picks as they wear which can be a dangerous, time consuming and expensive process. Consequently, efforts have been made to provide more secure connections between degradation pick and holder shanks and bore holes that may also allow for quick removal and replacement.
- For example, U.S. Pat. Pub. No. 2011/0254349 to Hall et al., describes a pick assembly comprising a pick shank configured to be press fit in a bore within a block. The shank comprises at least one longitudinal recess extending along the shank from a distal end of the shank. The recess allows the shank to resiliently collapse upon insertion into the bore while maintaining a press fit between the bore and the shank.
- Despite these advancements in the art, designs such as these comprising uneven perimeter thicknesses may lead to uneven stresses and thus premature failure. Thus, improvements allowing for more secure connections between degradation pick or holder shanks and bore holes that also allow for quick removal and replacement and even perimeter thicknesses are desired.
- A degradation pick or holder shank for facilitating installation, retention and removal is disclosed. The shank may comprise an axially compressive portion that may contract radially when stretched axially and then expand again radially when released. An installation tool may be used to stretch the shank axially during insertion into a bore and then release the shank to retain it within the bore.
- Such a shank may comprise at least one compliant region comprising an axially-variable cross section. The axially-variable cross section may comprise a bellows shape, an accordion shape, or other shapes to facilitate compliance. To form such a compliant region, a machining tool may be inserted to machine crevices into an interior of a shank.
- A shank of a degradation pick or holder may be inserted into a bore disposed within a holder or block wherein an installation tool may pull a distal end of the shank further into the bore. Pulling the distal end further into the bore may cause axial expansion within the shank and radial contraction within the compliant region. When the installation tool is withdrawn, the compliant region may expand radially to secure the shank within the bore.
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FIG. 1 illustrates an embodiment of a formation degradation machine. -
FIG. 2 illustrates a rotatable drum. -
FIGS. 3a-3b illustrate a degradation pick, according to an embodiment of the invention. -
FIG. 4a-4b illustrate a holder, according to an embodiment of the invention. -
FIG. 5a-5b illustrate a perspective cross-sectional view of an embodiment of a holder. -
FIG. 6a-d illustrates a perspective cross-sectional views of embodiments of a holder. -
FIG. 7 illustrates a perspective cross-sectional views of embodiments of a holder. -
FIG. 8 illustrates a perspective cross-sectional views of embodiments of a holder. -
FIG. 9 illustrates a perspective partially cross-sectional view of another embodiment of a holder. -
FIG. 10 illustrates a perspective cross-sectional view of embodiments of a portion of a holder. -
FIG. 11a-11b illustrates a perspective cross-sectional views of embodiments of a compliant region. -
FIG. 12a-c illustrates a perspective cross-sectional views of various embodiments of installation tools. -
FIG. 13 illustrates a perspective cross-sectional view of an embodiment of a pick. - In the following detailed description, only certain example embodiments of the disclosed subject matter are shown and described, by way of illustration. As those skilled in the art would recognize, the disclosed subject matter may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Also, in the context of the present application, when a first element is referred to as being “on” a second element, it can be directly on the second element or be indirectly on the second element with one or more intervening elements interposed therebetween.
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FIG. 1 shows an embodiment of aformation degradation machine 1000 comprising a plurality ofdegradation picks 1100 secured to an exterior of arotatable drum 1200. Rotation of therotatable drum 1200 by theformation degradation machine 1000 may bring thedegradation picks 1100 repeadedly into contact with a surface of amaterial 1300. This repeated engagement of the degradation picks 1100 to thematerial 1300 may degrade thematerial 1300 causing it to break up intoaggregate 1301. In the present embodiment, theformation degradation machine 1000 is located in an underground mine and thematerial 1300 to be degraded, coal for example, is contained in a wall of the mine. Once a portion of thematerial 1300 is degraded intoaggregate 1301 it may be captured by aconveyor 1001 and removed for processing. While the embodiment shown depicts arotatable drum 1200 on a formation degradation machine as part of a mining operation, it should be understood that the present invention may also be used in conjunction with rotatable drums or continuous chains being used in mining, road milling, trenching or other operations where it is desirable to degrade tough materials such as asphalt, concrete or rock. -
FIG. 2 shows an embodiment of arotatable drum 2200 as seen by a material to be degraded. A plurality ofblocks 2201 may be disposed around an exterior of therotatable drum 2200. Each of theblocks 2201 may have a bore disposed therein to receive ashaft 2101 from each of a plurality ofdegradation picks 2100. Rotation of therotatable drum 2200 may cause the degradation picks 2100 to engage and degrade a material. Theblocks 2201 may be positioned around the exterior of therotatable drum 2200 to optimize degradation and/or transport aggregate away from the material being degraded. -
FIG. 3a shows a perspective view of an embodiment of adegradation pick 3100 a and apick block 3201 a. The degradation pick may comprise ashank 3101 a that may be inserted into abore 3202 a of thepick block 3201 a. -
FIG. 3b shows a perspective view of an embodiment of adegradation pick 3100 b, aholder 3400 b, and apick block 3201 b. Thepick block 3201 b may comprise abore 3202 b for receiving ashaft 3401 b of theholder 3400 b. Theholder 3400 b may comprise ahole 3402 b for receiving ashank 3101 b of thedegradation pick 3100 b. Different holders may comprise bores of various diameters so as to accommodate degradation picks of various sizes to attach to a degradation drum (shown inFIG. 1 ). -
FIG. 4a discloses a perspective view of an embodiment of aholder 100 a. Theholder 100 a may comprise abody 101 a attached to ashank 111 a. Theshank 111 a may comprise acompliant region 110 a with an axially-variable cross section. In the embodiment shown, thecompliant region 110 a comprises a bellows shape. When theshank 111 a is urged into a bore (as shown inFIG. 3b ) thecompliant region 110 a may radially compress facilitating entry into the bore. -
FIG. 4b discloses a perspective cross-sectional view of another embodiment of aholder 100 b comprising abody 101 b andshank 111 b. Acompliant region 110 b with a bellows shape may comprise athin wall 112 b that may flex when subjected to radial or axial compression or expansion. -
FIG. 5a discloses a perspective cross-sectional view of an embodiment of aholder 200 a and ablock 220 a. Theholder 200 a may comprise ashank 211 a with acompliant region 210 a shaped to fit within abore 221 a of theblock 220 a. A bellows shape of thecompliant region 210 a may comprise aradius 212 a, wherein theradius 212 a may compress when urged into thebore 221 a. Due to a tapering 222 a of thebore 221 a, theradius 212 a may compress further when theholder 200 a is urged into thebore 221 a of theblock 220 a, as shown inFIG. 5 b. -
FIG. 5b discloses a perspective cross-sectional view of an embodiment of aholder 200 b inserted into abore 221 b within ablock 220 b. An internal radius of thebore 221 b may be narrower than anexternal radius 212 b of acompliant region 210 b of theholder 200 b when not disposed within thebore 221 b (as shown inFIG. 5a ). Thus theexternal radius 212 b of thecompliant region 210 b may contract when urged into thebore 221 b. Contraction of theradius 212 b may cause theholder 200 b to elongate along acentral axis 202 b thereof, enabling theholder 200 b to extend farther into thebore 221 b. -
FIGS. 6a through 6d are perspective cross-sectional views of embodiments of holders comprising compliant regions of various geometries. For example, in the embodiment shown inFIG. 6a aholder 300 a has acompliant region 310 a comprising apleat 313 a that creates additional surface area allowing for more axial expansion when inserted into a bore (shown inFIG. 5 ). InFIG. 6b , another embodiment of acompliant region 310 b comprises asharp accordion shape 314 b with threepleats 315 b. Another embodiment shown inFIG. 6c comprises acompliant region 310 c comprising asmooth accordion shape 316 c comprising threepleats 315 c. In yet another embodiment, shown inFIG. 6d , acompliant region 310 d comprises abarbed shape 317 d comprising threepleats 315 d. Each of these various geometries may contribute to compliance. -
FIG. 7 discloses a perspective cross-sectional view of an embodiment of aholder 400 comprising ashank 401 with acompliant region 410. Thecompliant region 410 may comprise abarbed shape 417 with one ormore pleats 415. Adistal end 402 of theshank 401 may comprise a threadedportion 403, wherein threaded components (shown inFIG. 9 ) for holder installation and removal may be utilized. -
FIG. 8 discloses a perspective cross-sectional view of aholder 500 disposed in abore 521 within ablock 520. Aninstallation tool 540, such as a bolt, may be inserted through ahole 504 in a front portion of theholder 500. Theinstallation tool 540 may pass through acompliant region 510 and apply pressure to abarrier 505 on a distal end of a shank of theholder 500. Theinstallation tool 540 may be pressed against thebarrier 505 by, for example, a hammer (not shown), whereby theholder 500 may elongate axially while thecompliant region 510 is compressed radially to facilitate installation. As theinstallation tool 540 is removed theholder 500 may retract axially while thecompliant region 510 expands radially to facilitate retention of theholder 500 within thebore 521. To remove theholder 500 from thebore 521, pressure may again be applied to thebarrier 505 by theinstallation tool 540 to radially constrict thecompliant region 510 while theholder 500 is withdrawn. -
FIG. 9 discloses a perspective partially cross-sectional view of another embodiment of aholder 600 disposed in abore 621 within ablock 620. Aninstallation tool 640 with a threadedend 641 may be inserted through ahole 604 and a compliant region 610 of theholder 600 whereby the threadedend 641 may be secured to a threadedportion 603 at a distal end of theholder 600. In this configuration, theinstallation tool 640 may apply pressure against the threadedportion 603 which may radially constrict the compliant region 610 to facilitate installation. As theinstallation tool 640 is removed the compliant region 610 may radially expand to facilitate retention of theholder 600 within thebore 621. For removal, pressure may again be applied to the threadedportion 603 by theinstallation tool 640 while theholder 600 is withdrawn. -
FIG. 10 discloses a perspective cross-sectional view of embodiments of a portion of aholder 700 comprising a compliant region juxtaposed with a portion of aholder 750 lacking a compliant region, both disposed in a bore within ablock 720. As can be seen, theholder 700 comprising the compliant region may extend further into theblock 720 than theholder 750 without the compliant region. -
FIGS. 11a and 11b discloses perspective cross-sectional views of embodiments of acompliant region sharp accordion shape sharp accordion shape machine tool 850 a, 850 b may be inserted into anopening -
FIGS. 12a through 12c disclose perspective cross-sectional views of various embodiments of installation tools. For example,FIG. 12a shows aholder 900 a disposed in a bore within ablock 920 a. Theholder 900 a may comprise a threadedportion 906 a disposed within theholder 900 a for receiving a threaded end of aninstallation tool 940 a. Theinstallation tool 940 a may be inserted through acompliant region 910 a and into the threadedportion 906 a. In this configuration, theinstallation tool 940 a may axially compress thecompliant region 910 a expanding it radially to help retain theholder 900 a within theblock 920 a. -
FIG. 12b shows aholder 900 b disposed in a bore within ablock 920 b. Theholder 900 b may comprise a threadedportion 906 b disposed within theholder 900 b mating with a threaded part of aninstallation tool 940 b. Theinstallation tool 940 b may pass through the threadedportion 906 b and press against abarrier 905 b on a distal end of theholder 900 b causing acompliant region 910 b disposed between the threadedportion 906 b andbarrier 905 b to expand axially. This axially expansion may radially constrict the compliant region aiding in installation or removal of theholder 900 b. -
FIG. 12c shows aholder 900 c disposed in a bore within ablock 920 c. Theholder 900 c may comprise ahole 904 c running therethrough to acompliant region 907 c. Anretention tool 940 c may be disposed in thehole 904 c and thread into a threadedportion 903 c disposed at a distal end of theholder 900 c. By so doing, theretention tool 940 c may axially compress thecompliant region 907 c causing it to expand radially and aiding in retaining theholder 900 c within theblock 920 c. In this embodiment, theretention tool 940 c may remain with theholder 900 c until removal. -
FIG. 13 discloses a perspective cross-sectional view of apick 4100 disposed directly in a bore within ablock 4120 without the use of a holder. Thepick 4100 may comprise abody 4101 attached to ashank 4160. Theshank 4160 comprises acompliant region 4110 wherein axial and radial expansion or contraction may occur. Theshank 4160 may further comprise a threadedhole 4106 disposed therein for receiving aninstallation tool 4140. Theinstallation tool 4140 may be inserted through thecompliant region 4110 and into the threadedhole 4106 and may axially compress thecompliant region 4110 causing it to expand radially to aid in retaining thepick 4100. Alternatively, unthreading theinstallation tool 4140 may allow the compliant region to axially expand and radially contract allowing for removal of thepick 4100. - Although only a few example embodiments have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the example embodiments without materially departing from the subject matter of this disclosure. Accordingly, all such modifications are intended to be included within the scope of this disclosure as defined in the following claims. Throughout the text and claims, use of the word “about” reflects the penumbra of variation associated with measurement, significant figures, and interchangeability, all as understood by a person having ordinary skill in the art to which this disclosure pertains. Additionally, throughout this disclosure and the accompanying claims, it is understood that even those ranges that may not use the term “about” to describe the high and low values are also implicitly modified by that term, unless otherwise specified.
Claims (5)
1. A degradation pick, comprising:
an axially compressive region.
2. The degradation pick of claim 1 , wherein the axially compliant region comprises an axially-variable cross section.
3. The degradation pick of claim 2 , wherein the axially-variable cross section comprises a bellows shape.
4. The degradation pick of claim 2 , wherein the axially-variable cross section comprises an accordion shape.
5. The degradation pick of claim 1 , wherein when the axially compressive portion contracts radially when extended axially, and wherein the axially compressive portion expands radially when contracted axially.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/293,275 US20170101867A1 (en) | 2015-10-13 | 2016-10-13 | Axially compressive degradation picks and holders |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562240932P | 2015-10-13 | 2015-10-13 | |
US15/293,275 US20170101867A1 (en) | 2015-10-13 | 2016-10-13 | Axially compressive degradation picks and holders |
Publications (1)
Publication Number | Publication Date |
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US20170101867A1 true US20170101867A1 (en) | 2017-04-13 |
Family
ID=58498958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/293,275 Abandoned US20170101867A1 (en) | 2015-10-13 | 2016-10-13 | Axially compressive degradation picks and holders |
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US (1) | US20170101867A1 (en) |
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US10385689B1 (en) * | 2010-08-27 | 2019-08-20 | The Sollami Company | Bit holder |
US10415386B1 (en) | 2013-09-18 | 2019-09-17 | The Sollami Company | Insertion-removal tool for holder/bit |
US10502056B2 (en) | 2015-09-30 | 2019-12-10 | The Sollami Company | Reverse taper shanks and complementary base block bores for bit assemblies |
US20200023447A1 (en) * | 2018-07-18 | 2020-01-23 | The Sollami Company | Rotatable bit cartridge |
US10577931B2 (en) | 2016-03-05 | 2020-03-03 | The Sollami Company | Bit holder (pick) with shortened shank and angular differential between the shank and base block bore |
US10598013B2 (en) | 2010-08-27 | 2020-03-24 | The Sollami Company | Bit holder with shortened nose portion |
US10612376B1 (en) | 2016-03-15 | 2020-04-07 | The Sollami Company | Bore wear compensating retainer and washer |
US10612375B2 (en) | 2016-04-01 | 2020-04-07 | The Sollami Company | Bit retainer |
US10633971B2 (en) | 2016-03-07 | 2020-04-28 | The Sollami Company | Bit holder with enlarged tire portion and narrowed bit holder block |
US10683752B2 (en) | 2014-02-26 | 2020-06-16 | The Sollami Company | Bit holder shank and differential interference between the shank distal portion and the bit holder block bore |
US10746021B1 (en) | 2012-10-19 | 2020-08-18 | The Sollami Company | Combination polycrystalline diamond bit and bit holder |
US10767478B2 (en) | 2013-09-18 | 2020-09-08 | The Sollami Company | Diamond tipped unitary holder/bit |
US10794181B2 (en) | 2014-04-02 | 2020-10-06 | The Sollami Company | Bit/holder with enlarged ballistic tip insert |
US10876402B2 (en) | 2014-04-02 | 2020-12-29 | The Sollami Company | Bit tip insert |
US10947844B1 (en) | 2013-09-18 | 2021-03-16 | The Sollami Company | Diamond Tipped Unitary Holder/Bit |
US10968738B1 (en) | 2017-03-24 | 2021-04-06 | The Sollami Company | Remanufactured conical bit |
US10968739B1 (en) | 2013-09-18 | 2021-04-06 | The Sollami Company | Diamond tipped unitary holder/bit |
US10995613B1 (en) | 2013-09-18 | 2021-05-04 | The Sollami Company | Diamond tipped unitary holder/bit |
US11168563B1 (en) | 2013-10-16 | 2021-11-09 | The Sollami Company | Bit holder with differential interference |
US11187080B2 (en) | 2018-04-24 | 2021-11-30 | The Sollami Company | Conical bit with diamond insert |
US11261731B1 (en) | 2014-04-23 | 2022-03-01 | The Sollami Company | Bit holder and unitary bit/holder for use in shortened depth base blocks |
US11279012B1 (en) | 2017-09-15 | 2022-03-22 | The Sollami Company | Retainer insertion and extraction tool |
US11339654B2 (en) | 2014-04-02 | 2022-05-24 | The Sollami Company | Insert with heat transfer bore |
US11339656B1 (en) | 2014-02-26 | 2022-05-24 | The Sollami Company | Rear of base block |
US11891895B1 (en) | 2014-04-23 | 2024-02-06 | The Sollami Company | Bit holder with annular rings |
-
2016
- 2016-10-13 US US15/293,275 patent/US20170101867A1/en not_active Abandoned
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US10598013B2 (en) | 2010-08-27 | 2020-03-24 | The Sollami Company | Bit holder with shortened nose portion |
US10385689B1 (en) * | 2010-08-27 | 2019-08-20 | The Sollami Company | Bit holder |
US10746021B1 (en) | 2012-10-19 | 2020-08-18 | The Sollami Company | Combination polycrystalline diamond bit and bit holder |
US10767478B2 (en) | 2013-09-18 | 2020-09-08 | The Sollami Company | Diamond tipped unitary holder/bit |
US10415386B1 (en) | 2013-09-18 | 2019-09-17 | The Sollami Company | Insertion-removal tool for holder/bit |
US10995613B1 (en) | 2013-09-18 | 2021-05-04 | The Sollami Company | Diamond tipped unitary holder/bit |
US10968739B1 (en) | 2013-09-18 | 2021-04-06 | The Sollami Company | Diamond tipped unitary holder/bit |
US10947844B1 (en) | 2013-09-18 | 2021-03-16 | The Sollami Company | Diamond Tipped Unitary Holder/Bit |
US11168563B1 (en) | 2013-10-16 | 2021-11-09 | The Sollami Company | Bit holder with differential interference |
US11339656B1 (en) | 2014-02-26 | 2022-05-24 | The Sollami Company | Rear of base block |
US10683752B2 (en) | 2014-02-26 | 2020-06-16 | The Sollami Company | Bit holder shank and differential interference between the shank distal portion and the bit holder block bore |
US10794181B2 (en) | 2014-04-02 | 2020-10-06 | The Sollami Company | Bit/holder with enlarged ballistic tip insert |
US10876402B2 (en) | 2014-04-02 | 2020-12-29 | The Sollami Company | Bit tip insert |
US11339654B2 (en) | 2014-04-02 | 2022-05-24 | The Sollami Company | Insert with heat transfer bore |
US11891895B1 (en) | 2014-04-23 | 2024-02-06 | The Sollami Company | Bit holder with annular rings |
US11261731B1 (en) | 2014-04-23 | 2022-03-01 | The Sollami Company | Bit holder and unitary bit/holder for use in shortened depth base blocks |
US10502056B2 (en) | 2015-09-30 | 2019-12-10 | The Sollami Company | Reverse taper shanks and complementary base block bores for bit assemblies |
US10577931B2 (en) | 2016-03-05 | 2020-03-03 | The Sollami Company | Bit holder (pick) with shortened shank and angular differential between the shank and base block bore |
US10954785B2 (en) | 2016-03-07 | 2021-03-23 | The Sollami Company | Bit holder with enlarged tire portion and narrowed bit holder block |
US10633971B2 (en) | 2016-03-07 | 2020-04-28 | The Sollami Company | Bit holder with enlarged tire portion and narrowed bit holder block |
US10612376B1 (en) | 2016-03-15 | 2020-04-07 | The Sollami Company | Bore wear compensating retainer and washer |
US10612375B2 (en) | 2016-04-01 | 2020-04-07 | The Sollami Company | Bit retainer |
US10968738B1 (en) | 2017-03-24 | 2021-04-06 | The Sollami Company | Remanufactured conical bit |
US11279012B1 (en) | 2017-09-15 | 2022-03-22 | The Sollami Company | Retainer insertion and extraction tool |
US11187080B2 (en) | 2018-04-24 | 2021-11-30 | The Sollami Company | Conical bit with diamond insert |
US11103939B2 (en) * | 2018-07-18 | 2021-08-31 | The Sollami Company | Rotatable bit cartridge |
US20200023447A1 (en) * | 2018-07-18 | 2020-01-23 | The Sollami Company | Rotatable bit cartridge |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SMITH INTERNATIONAL, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HALL, DAVID R.;LEANY, FRANCIS E.;PETERSON, GARY;AND OTHERS;SIGNING DATES FROM 20170719 TO 20170803;REEL/FRAME:043224/0239 |
|
AS | Assignment |
Owner name: SMITH INTERNATIONAL, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HALL, DAVID R.;LEANY, FRANCIS E.;PETERSON, GARY;AND OTHERS;SIGNING DATES FROM 20170721 TO 20171215;REEL/FRAME:044412/0714 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |