CN104619946A - Downhole cutting tools having hybrid cutting structures - Google Patents
Downhole cutting tools having hybrid cutting structures Download PDFInfo
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- CN104619946A CN104619946A CN201380046979.XA CN201380046979A CN104619946A CN 104619946 A CN104619946 A CN 104619946A CN 201380046979 A CN201380046979 A CN 201380046979A CN 104619946 A CN104619946 A CN 104619946A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 419
- 239000000463 material Substances 0.000 description 27
- 230000015572 biosynthetic process Effects 0.000 description 20
- 229910003460 diamond Inorganic materials 0.000 description 17
- 239000010432 diamond Substances 0.000 description 17
- 239000002131 composite material Substances 0.000 description 13
- 238000005553 drilling Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Landscapes
- 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)
- Drilling Tools (AREA)
Abstract
A drill bit is disclosed, wherein the drill bit has a bit body with a longitudinal axis extending there through and a bit face. A plurality of blades extends from the bit body, wherein the plurality of blades has a blade profile including a nose. A plurality of cutting elements are disposed on the plurality of blades, including a plurality of non-planar cutting elements and a plurality of rotatable cutting elements, wherein the plurality of non-planar cutting elements are disposed in a non-planar cutting element region on at least one of the blades between the longitudinal axis and the nose
Description
Background technology
Boring the well in stratum, such as, time for reclaiming hydrocarbon or other application, in fact usually needing drill bit to be connected to and be end-to-end to together to be formed on the lower end of the drill rod assemblies part of " drill string ".By rotating drill string on the ground or passing through to activate down-hole motor or turbine, or make bit by these two kinds of methods simultaneously.By the weight being applied to drill string, the drill bit of rotation engages with stratum, by abrasion, and pressure break, or shear action, or make drill bit cut through earth formation material by the combination of all cutting methods, form the well along predefined paths head for target region thus.
Develop and found a lot of dissimilar drill bit being applied to such as drilling well eye.The drill bit of two kinds of main Types is rock bit and fixed cutter (or revolving scraper) drill bit.Most fixed cutter drill bit design comprises around the angled multiple wings spaced apart of bit face.Wing is given prominence to from drill body outward radial and is formed flow channel among each other.In addition, cutting element is grouped and the row radially extended are arranged on several wing usually.The configuration of the cutting element on wing or layout can according to multiple factors, and stratum such as to be drilled changes on a large scale.
The cutting element be located on the wing of fixed cutter drill bit is formed by extremely hard material usually.In typical fixed cutter drill bit, each cutting element comprises and holds and be fixed on elongated in the indent on the surface being formed at one of them wing and be substantially columniform tungsten carbide base material.Cutting element generally includes the hard incised layer be made up of polycrystalline diamond (PCD) or other superhard abrasive corrosion material, such as thermally-stabilised diamond or polycrystal cubic boron nitride.For convenience's sake, citation " PCD drill bit " or " PCD cutter " institute as used herein refers to fixed cutter drill bit or the cutting element of the hard incised layer that employing is made up of polycrystalline diamond or other superhard abrasive corrosion material.
With reference to Fig. 1 and 2, show and be suitable for drilling lithostratigraphy to form traditional fixed cutter or the drag bit 10 of well.Drill bit 10 totally comprises drill body 12, bar 13 and is connected to by drill bit 10 and is used to rotary drilling-head with the screw connection structure of the drill string (not shown) of drilling well eye or pin 14.Bit face 20 supports wing shape cutting structure 15 and is formed on the end contrary with the end 16 of pin of drill bit 10.Drill bit 10 comprises further makes drill bit 10 carry out around it the central axis 11 that rotates along the cut direction represented by arrow 18.
Cutting structure 15 is arranged on the face 20 of drill bit 10.Cutting structure 15 comprises multiple angled operator wing 31,32,33 spaced apart, and secondary wing 34,35,36, and wherein, each extends from bit face 20.The operator wing 31,32,33 and secondary wing 34,35,36 extend along bit face 20 radial direction generally and then extend along a part of peripheral, axial of drill bit 10.But secondary wing 34,35,36 extends towards the outer periphery of drill bit 10 along bit face 20 from the position away from drill axis 11.Therefore, as used herein, " secondary wing " can be used to refer to and start and generally along the radial wing extending to the periphery of drill bit of bit face from a certain distance of distance drill axis.The operator wing 31,32,33 and secondary wing 34,35,36 are separated by drilling fluid flow path 19.
Still with reference to Fig. 1 and 2, each operator wing 31,32,33 comprises the wing top 42 for installing multiple cutting element, and each secondary wing 34,35,36 comprises the wing top 52 for installing multiple cutting element.Especially, cutting element 40 (each all has cut surface 44) is installed in the wing top 42 being formed at each operator wing 31,32,33 and each secondary wing 34,35,36 respectively, in the recess in 52.The row that the immediate radial direction of leading edge of cutting element 40 one-tenth disposed adjacent one another and each operator wing 31,32,33 and each secondary wing 34,35,36 extends.Each cut surface 44 has the cutting edge 44a that distance installs wing top 42,52 outermost farthest of cutting element 40.
Referring now to Fig. 3, show the profile of drill bit 10, it shows as all wings (such as, the operate wing 31,32,33 and secondary wing 34,35,36) and the cut surface 44 of all cutting elements 40 is rotated in single rotation profile.In rotation profile view, the wing top 42,52 of all wing 31-36 of drill bit 10 is formed and limits the combination or the composite cutter wing contour 39 that extend to the external diameter 23 of drill bit 10 from drill axis 11 radial direction.Therefore, as used herein, phrase " composite cutter wing contour " refers to the profile that the external diameter from drill axis to drill bit extends, and it is formed by the wing top of all wings of the drill bit rotating to single rotation profile (that is, in rotation profile view).
Traditional composite cutter wing contour 39 (being shown clearly in most in right one side of something of drill bit 10 in figure 3) can be divided into three regions generally, is marked as conical area 24 respectively, shoulder regions 25, and region, rail footpath 26.The most inner region of radial direction that conical area 24 comprises drill bit 10 and the composite cutter wing contour 39 extended from drill axis 11 to shoulder regions 25 generally.As shown in Figure 3, in the most traditional fixed cutter drill bit, conical area 24 concavity generally.Adjacent with conical area 24 is shoulder (or resupinate bending) region 25.In the most traditional fixed cutter drill bit, shoulder regions 25 becomes convex generally.Radial outer adjacent with shoulder regions 25 be region, rail footpath 26, it is parallel to drill axis 11 and extends on the outer radial periphery of composite cutter wing contour 39.Therefore, the composite cutter wing contour 39 of conventional drill 10 comprises a concave regions-conical area 24 and a convex region-shoulder regions 25.
Convex shoulder regions 25 and composite cutter wing contour 39 axially under point limit wing profile hat top 27.At wing profile hat top 27 place, the slope of the tangent line 27a of convex shoulder regions 25 and composite cutter wing contour 39 is zero.Therefore, as used herein, term " wing profile Guan Ding " refers to the point along the convex region of the composite cutter wing contour of drill bit in rotation profile view, is zero at that point with the tangent slope of composite cutter wing contour.To the traditional fixed cutter drill bit of the overwhelming majority (such as, drill bit 10), composite cutter wing contour only comprises a convex shoulder regions (such as, convex shoulder regions 25), and only comprise a wing profile Guan Ding (such as, being preced with top 27).As Figure 1-3, cutting element 40 is along wing 31-36 layout in column and along the conical area 24 of previously described composite cutter wing contour 39, the bit face 20 in the regions such as shoulder regions 25 and region, rail footpath 26 is arranged.Especially, cutting element 40 is arranged on the precalculated position be radially spaced relative to the central axis 11 of drill bit 10 on wing 31-36.
Do not consider bite type, the time span that expense and depth and place place well being got into expectation of drilling well spend is directly proportional.Thus, drilling time to a great extent by must more bit change to reach the impact of the number of times of formation at target locations.This is because during each more bit change, must may take out on one section of one section of ground from well for the whole drill string of several miles long.Once drill string is removed and installs new drill bit, drill bit must be lowered by borehole bottom on drill string, and drill string must build on one section one section ground again.Be called this process need of " removing " of drill string a large amount of time, workload and cost.Therefore, always expect to adopt drilling well sooner and drill bit that is longer and that can use in wider Different Strata hardness range.
Summary of the invention
This general introduction is for being introduced in choosing of the design that further describes in detailed description.This general introduction is not key for limiting claimed theme or inner characteristic, neither be used for the scope helping to limit claimed main body.
On the one hand, embodiment disclosed herein relates to a kind of drill bit, and it has drill body, and drill body has the longitudinal axis and bit face that run through extension.Multiple wing extends from drill body, and wherein said multiple wing has the wing profile comprising Guan Ding.Multiple cutting element is arranged on described multiple wing, and comprise multiple on-plane surface cutting element and multiple rotating cutting elements, wherein, described multiple on-plane surface cutting element is arranged in the on-plane surface cutting element region between longitudinal axis and hat top at least one wing.
On the other hand, embodiment disclosed herein relates to a kind of down-hole cutting tool with tool body, and this tool body has the longitudinal axis and cut end that run through extension.Multiple wing extends in an azimutal direction from tool body, and multiple cutting element is arranged on multiple wing.Described multiple cutting element comprises at least one rotating cutting elements and at least one on-plane surface cutting element, wherein, at least one on-plane surface cutting element described be arranged in wing with cut end immediate on-plane surface cutting element region.
The other side of claimed theme and advantage become more obvious by description below and appended claim.
Accompanying drawing explanation
Fig. 1 illustrates the drill bit of prior art.
Fig. 2 illustrates the top view of the drill bit of prior art.
Fig. 3 illustrates the sectional view of the drill bit of prior art.
Fig. 4 illustrates the top view of the drill bit according to embodiment of the present disclosure.
Fig. 5 illustrates the cutting profile according to embodiment of the present disclosure.
Fig. 6 illustrates the conical cutting element according to embodiment of the present disclosure.
Fig. 7 illustrates the conical cutting element according to embodiment of the present disclosure.
Fig. 8 illustrates the conical cutting element according to embodiment of the present disclosure.
Fig. 9 illustrates the cutting element according to an embodiment of the present disclosure.
Figure 10 illustrates the rotating cutting elements according to embodiment of the present disclosure.
Figure 11 illustrates the conical cutting element according to embodiment of the present disclosure.
Figure 12 illustrates the conical cutting element according to embodiment of the present disclosure.
Figure 13 illustrates the lateral view of the Double Circular Bit according to embodiment of the present disclosure.
Figure 14 illustrates the cutting profile of the Double Circular Bit according to embodiment of the present disclosure.
Figure 15 A-15B illustrates lateral view and the sectional view of conical cutting element.
Figure 16 A-16B illustrates lateral view and the sectional view of the pointed cutting element of the side surface with protrusion.
Figure 17 illustrates the sectional view of the pointed cutting element with recessed side surface.
Detailed description of the invention
On the one hand, embodiment disclosed herein relates to drill bit or comprises other down-hole cutting tool of polytype cutting structure.Especially, embodiment disclosed herein relates to the cutting tool of the cutting element comprising two or more type, and every type cutting element all has the action of multi-form cuts formation.Other embodiment disclosed herein relates to comprising and has the fixing cutting element of on-plane surface cut end and the drill bit of rotating cutting elements, comprises the arrangement of these cutting elements on drill bit and the modification that can be used on the cutting element of Drilling optimization.
As used herein, " on-plane surface cutting element " refers to the cutting element with on-plane surface cut end and can refer to shaping cutting element.The shape of on-plane surface cut end can comprise any geometry, and wherein, the part that cutting element engages with stratum is nonplanar.Usually, traditional cutter is on the joint stratum, neighboring place of cylindric briquet and enter in stratum along with cutter cuts or excavation, and the part in plane cutting face engages with stratum.These cutters can also comprise inclined-plane or slope edge usually, but the surf zone of in fact most cut surface is plane.But these shapes are not positioned within the scope of the term " on-plane surface cutting element " limited here.On the contrary, on-plane surface cutting element has height extension from cylindric side surface above the transition part of cut end, and most cut end is nonplanar substantially.These shapes can comprise the cutting element of point and dome-shaped cutting element usually.The cutting element being as general as point can have slightly pointed cut end usually, that is, as seen in figs. 15-17, has circular cone, ends at a summit raised or sunken side surface.For the ease of distinguishing the cutting element of this two type, as above referring to described by Fig. 1 and 2, term " cutting element " generally refers to the cutting element of any type, and " cutter " refers to those cutting elements with plane cutting face, " on-plane surface cutting element " refers to the cutting element that those have on-plane surface cut end.
As used herein, term " conical cutting element " refers to the cutting element having and be substantially conical cut end 62 (comprising right cone or oblique cone), that is, as shown in Figure 15 A-15B, and the conical sidewall 64 terminated with rounded vertex 66.Different from the geometry circular cone terminated with pointed vertex, the summit of conical cutting element of the present disclosure has the bend between side surface and summit.In addition, in one or more embodiments, bullet shaped cutting element 70 can be used.As shown in Figure 16 A-16B, term " bullet shaped cutting element " refers to cutting element and has different from being as general as conical the side surface protruding and side surface 78 terminated with rounded vertex 76 of being as general as.In one or more embodiments, little obviously than convex side surface 78 of the radius of curvature on summit 76.But, it is further noted that on-plane surface cutting element of the present disclosure also can comprise other shape, such as, as shown in figure 17 with the female flank surface of rounded vertex termination.In each such embodiment, on-plane surface cutting element can have smoothly transit (namely side surface or sidewall connect with the sweep tangent on summit) between side surface and rounded vertex, but in certain embodiments, the transition of Non-smooth surface can be had (namely, the tangent line of side surface and the tangent line on summit are crossed as not 180 degrees angle mutually, such as from about 120 degree to being less than 180 degree).In addition, in one or more embodiments, on-plane surface cutting element can comprise any shape with the cut end extended above clamping or base region, wherein, the extended height of cut end is at least 0.25 times of the diameter of cutting element, or is at least 0.3,0.4,0.5 or 0.6 times of the diameter of cutting element in other embodiment one or more.
Such as, Fig. 6-8 shows the modification of the conical cutting element that can be in any embodiment disclosed herein.As shown in the figure, conical cutting element 128 can have diamond layer 132 on base material 134 (such as cemented tungsten carbide base material), and wherein, diamond layer 132 forms conical diamond working surface.But conical cutting element also can be made up of other material, because be that their shape limits conical cutting element instead of their material.Particularly, circular cone geometry can comprise the sidewall connected with the sweep tangent on summit.Conical cutting element 128 can adopt and form diamond and strengthen the similar process of insert (being used in rock bit) or pass through parts are welded together and formed.Junction surface (not illustrating individually) between diamond layer 132 and base material 134 can be on-plane surface or uneven, such as, for helping to reduce accident that diamond layer 132 in operation comes off from base material 134 and improving intensity and the resistance to impact of element.Those skilled in the art can recognize that junction surface can comprise one or more raised or sunken part, on-plane surface junction surface as known in the art.In addition, those skilled in the art can recognize that some on-plane surface junction surface of use can allow the diamond layer in the apex zone of layer to have larger thickness.In addition, can desirably produce the junction surface shape making diamond layer have maximum gauge in the key area surrounding the main contact area between diamond enhancing element and stratum.
May be used for of the present disclosure be essentially point other shape of cutting element and junction surface be included in described in U.S. Patent Publication No.2008/0035380, its entirety is incorporated into this by reference.In addition, diamond layer 132 can be formed by any polycrystalline superhard abrasive material, such as, comprise polycrystalline diamond, polycrystal cubic boron nitride, thermally-stabilised polycrystalline diamond (by carrying out process formed to the polycrystalline diamond formed by metal such as cobalt or to by having polycrystalline diamond that the coefficient of thermal expansion metal lower than cobalt formed).
The summit of conical cutting element can have sweep, and it comprises a radius of curvature.In the embodiment shown in Fig. 6-8, the scope of radius of curvature can be about 0.050 to 0.125.These sweeps can also exist in the cutting element type shown in Figure 16 and 17.In certain embodiments, sweep can comprise transformable radius of curvature, a parabolical part, a hyp part, a part for catenary or Parameter Spline.In addition, with reference to Fig. 6 and 7, the coning angle 130 of conical end can change and choose based on drilled concrete stratum.In particular embodiments, coning angle 130 can be about 75 to 90 degree.
Referring now to Fig. 8, it illustrates conical cutting element that is asymmetric or deflection.As shown in Figure 8, the axis of cutting circular cone cutting tip 135 of conical cutting element 128 and the axis disalignment of base material 134.In a special embodiment, in the drill bit that at least one asymmetric conical cutting element can be used in any description or reamer reamer.The choosing of asymmetric conical cutting element can be selected as aligning from the normal force of formation function on cutting element or reaction force and cutting tip axis or changing the invasive of conical cutting element relative to stratum better.In a special embodiment, can be 37.5 to 45 in cut end or the angle 131 that formed between circular cone axis and base material axis to spend, wherein, the angle on the tail side of cutting element is larger, 5-20 degree larger than toe angle (obtaining from the front side measurement of cutting element).
Other design of conical cutting element also can be used in embodiment of the present disclosure, such as at U.S. Patent application No.61/441,319,13/370,734,61/499,851,13/370,862 and 61/609, described in 527, they are all transferred to this assignee and entirety is incorporated herein by reference.
In addition, on-plane surface cutting element of the present disclosure can pass through methods known in the art, and such as soldering is attached to drill bit or other down-hole cutting tool, or can rotatably be remained on downhole tool.Such as, on-plane surface cutting element rotatably can be remained on downhole tool by one or more maintaining body, such as, by keeping the modes such as ball, spring, pin.In one or more embodiments, on-plane surface cutting element can use and be arranged on multiple maintenance balls between corresponding groove and the inner surface of sleeve that the outer surface around conical cutting element body formed and rotatably remained on and formed with the recess on the wing of downhole tool, described downhole tool is such as drill bit or reamer reamer, and described sleeve is attached to recess.In other embodiments, on-plane surface cutting element can use the change of the diameter of on-plane surface cutting element body rotatably to remain in the recess be formed in the wing of downhole tool.Such as, on-plane surface cutting element body or base material can have first diameter contiguous with on-plane surface cut end and the axial Second bobbin diameter away from on-plane surface cut end, and wherein Second bobbin diameter is greater than the first diameter.The sleeve (it can be attached to recess) or the recess that surround on-plane surface cutting element body can have first interior diameter corresponding with the first diameter of on-plane surface cutting element.Therefore, when on-plane surface cutting element is assembled into corresponding sleeve or recess is inner, larger Second bobbin diameter maintains on-plane surface cutting element.The various examples of maintaining body are also included in U.S. Patent Publication No.2012/0132471 and U.S. Patent No. 7,703,559 and 8,091, in 655 describe those, they are all transferred to this assignee and entirety is incorporated into this by reference.
In addition, although on-plane surface cutting element of the present disclosure can rotatably remain on down-hole cutting tool, such as drill bit or reamer reamer, but refer to that the term " on-plane surface cutting element " of the cutting element with on-plane surface cut end is different from term " rotating cutting elements ", rotatable cutting element can rotatably be remained on the cutting tool of down-hole similarly, but does not have on-plane surface cut end.
As used herein, term " rotating cutting elements " is commonly referred to as the cutting element that at least one surface of cutting element or part rotate along with the contact on itself and stratum.Along with rotating cutting elements contact stratum, cutting action can allow a part for cutting element to rotate around the cutting element axis extending through cutting element.The rotation at least partially of rotating cutting elements can allow cutting surfaces to use the whole outward flange cuts formation of cutting surfaces instead of fix in tradition see in cutting element such and use outer peripheral same sector cuts formation.Rotating cutting elements of the present disclosure can comprise the rotating cutting elements of all kinds and size.Such as, the size of rotating cutting elements can comprise when being not limited to 9mm, 13mm, 16mm and 19mm.In addition, rotating cutting elements can comprise those and remains on the rotating cutting elements that in outer support member, that kept by maintaining body or limiter or the two combination kept.
The example of available rotating cutting elements in the disclosure can at least at U.S. Patent Publication No.2007/0278017, and 2011/0297454 and 2012/0132471 and U.S. Patent No. 7,703,559 and 8,091, find in 655, these patents are openly incorporated into this by reference.Such as, some rotating cutting elements comprises the internal rotating cutting element being arranged on enclosure or cutter recess and maintaining body inside.The rotation of internal rotating cutting element can be controlled by the frictional force between side direction cutting force and area supported.If side direction cutting force produces can overcome the moment of torsion coming from frictional force, rotating part rotates motion.Side direction cutting force can be subject to the impact of cutter angle of heel, back rake angle and geometry (comprising working surface pattern disclosed herein).In addition, side direction cutting force can be subject to the impact of the surface finish characteristic of cutting element parts surface, the friction characteristics on stratum and drilling parameter such as depth of cut.Frictional force on area supported such as can be subject to the impact of surface finish characteristic, slurry compounding etc.The design of rotating cutting elements disclosed herein can be selected as guaranteeing that side direction cutting is made every effort to overcome and takes frictional force thus allow rotating part to rotate.Various design of the present disclosure is considered to be described together with the exemplary embodiments of rotating cutting elements below.But the disclosure is not limited thereto.Those skilled in the art can recognize that any cutting element that can rotate around himself axis may be used to drill bit of the present disclosure or other cutting tool.
According to embodiment of the present disclosure, down-hole cutting tool can have tool body, and tool body has longitudinal axis from wherein extending through and cut surface.Multiple wing can extend along azimuth direction from tool body, and multiple cutting element, comprise at least one rotating cutting elements and at least one conical cutting element, can be arranged on multiple wing.Conical cutting element can be arranged on standing in the region of high-strength impact in drillng operation on wing, and rotating cutting elements can be arranged on standing in the region of high wearing and tearing on wing.Such as, multiple conical cutting element can be arranged on one or more wing closest in the wing region of cut surface, and multiple rotating cutting elements can be arranged in the remaining area of wing.In other embodiments, multiple conical cutting element can be arranged in the wing region of the center line closest to longitudinal axis or drill bit on one or more wing, and arrange along cut surface, and multiple rotating cutting elements can be arranged in each wing region adjacent with conical cutting element region.As used herein, conical cutting element region refers to the region being provided with conical cutting element wherein, and rotating cutting elements region refers to the region being provided with rotating cutting elements wherein.
Such as, Fig. 4 shows on-plane surface cutting element (be in particular conical cutting element, but the cutting element of other type also can be used in other embodiment one or more) according to an embodiment of the present disclosure and the layout of rotating cutting elements on drill bit.As shown in the figure, drill bit 400 has drill body 402, and it has longitudinal axis 405 from wherein extending through and bit face 404.Multiple wing 410 is radial along bit face 404 from longitudinal axis to be extended and axially extends along drill body 402 from bit face 404.Especially, the drill bit shown in Fig. 4 has multiple operator wing 417 and multiple secondary wing 418, wherein, operator the wing 417 from than secondary wing 418 closer to longitudinal axis point extend.Multiple conical cutting element 420 and multiple rotating cutting elements 430 are arranged on wing 410.As shown in the figure, conical cutting element 420 is arranged in the region of the wing 410 closest to longitudinal axis 405 at least one wing 410, and rotating cutting elements 430 is arranged in the remaining area of wing 410.Conical cutting element region extends a radial distance 411 around bit face 404 from longitudinal axis 405, and rotating cutting elements region extends a distance along drill body 402 from conical cutting element region.
The cutting element that the wing of cutting tool can comprise single type or the cutting element that can comprise more than a type.For example, referring to Fig. 4, the operator wing 417 has the cutting element of two types, namely comprise multiple conical cutting element 420 and multiple rotating cutting elements 430, and secondary wing 418 has cutting element, i.e. multiple rotating cutting elements 430 of a type.But the disclosure is not limited thereto.Such as, according to some embodiment, wing can only comprise conical cutting element.In other embodiments, wing can comprise the cutting element more than two types, such as the combination of conical cutting element, rotating cutting elements and fixed cutter, and fixed cutter such as can be arranged in the rule region, footpath of drill bit.
In addition, as shown in Figure 4, conical cutting element 420 is only arranged on the operator wing 417, and wherein, as shown in rotation profile view, the radial distance in conical cutting element region is not overlapping with secondary wing 418.But according to other embodiment, conical cutting element can only be arranged on the wing chosen to form the conical cutting element region of extension one radial distance overlapping with not having the wing of conical cutting element.In another other embodiment, conical cutting element can be arranged on all wings of cutting tool.In such embodiments, as shown in rotation profile view, the conical cutting element region be formed on each wing can radial equalization be arranged, and occupies identical region to make the conical cutting element region on each wing.Selectively, as shown in rotation profile view, in the embodiment that conical cutting element is arranged on all wings of cutting tool, being formed in conical cutting element on each wing can unequal setting and/or extend different radial distances, occupies different regions to make conical cutting element region.
According to the conical cutting element region of embodiment of the present disclosure and rotating cutting elements region shown in the rotation profile view of Fig. 5.Especially, the profile of drill bit 500 is illustrated it and seems to make all wings 510 and the cut surface of whole cutting elements rotates to single rotation profile 512.In rotation profile view, the wing top of all wings 510 of drill bit 500 is formed and limits from longitudinal axis 505 towards the external diameter of drill bit 500 and along the axially extended combination of longitudinal axis 505 or composite cutter wing contour 512.As shown in the figure, wing profile 512 has hat top 514, and it is arranged on the axial uppermost point of wing profile 512.It should be noted that term " topmost " is a relative term and with being uppermost part in figure in Figure 5.Multiple conical cutting element 520 is arranged in the region 525 of the wing 510 between longitudinal axis 505 and hat top 514, and wherein, conical cutting element region 525 extends a radial distance from longitudinal axis 505.Multiple rotating cutting elements 530 is arranged in the wing region 535 adjacent with conical cutting element region 525, and wherein, rotating cutting elements region 535 extends a distance along drill body from conical cutting element region 525.In certain embodiments, rotating cutting elements region 535 can extend the Distance Remaining of wing from conical cutting element region 525, in other embodiments, rotating cutting elements region 535 can extend the distance that is less than the Distance Remaining of wing from conical cutting element region 525.
According to some embodiment, on-plane surface cutting element region can extend whole distance to Guan Ding from longitudinal axis.As described above, the Guan Ding of outline portion substantially with the plane tangent perpendicular to drill axis.Such as, but in other embodiments, on-plane surface cutting element region can be extended on the part distance between longitudinal axis and hat top, on-plane surface cutting element region 525 as shown in Figure 5.Such as, on-plane surface cutting element region can extend to Guan Ding from the position of departing from longitudinal axis, from the position of departing from longitudinal axis, extend one push up radial inner distance relative to hat, or from longitudinal axis, extend one relative to being preced with the radial inner distance in top.Therefore, according to embodiment of the present disclosure, on-plane surface cutting element region can extend various radial distance at longitudinal axis and each position be preced with in the bit face region between pushing up.
In addition, on drill bit longitudinal axis 505 or near, on-plane surface cutting element (in one embodiment for conical) can be used as central core component 524 and is included.This core parts are directly attached to being formed on the drill body in the cavity between wing, instead of on wing (conical cutting element 520 and rotating cutting elements are attached on wing).According to the disclosure, it is lower than the cut edge of the first radial cuts element 522 cutting element of non-planar-face cutting element or other type (no matter be) that center on-plane surface core parts 524 can be set to its summit.In a special embodiment, the height on the summit of conical core element can lower than the cut edge of the first radial cuts element, low 0 to 1 inch in certain embodiments, the bit diameter of low 0.1 to 0.35 times in other embodiments, or to the bit diameter of 0.1 times.In addition, the coning angle of conical core element can be 60 to 120 degree in certain embodiments, is 80 to 90 degree in other embodiments.The diameter of conical core element can be 0.25 to 1.5 inches, and is 0.3 to 0.7 inch in other embodiments.In addition, departing from the height of cut edge can from about 0.1 to 6 or in other embodiments from about 0.5 to 3 with the ratio of the diameter of conical cutting element.In addition, the diameter of the prostheses or cavity (that is, the region between multiple wing) that are provided with conical core element wherein can reach 3 times of on-plane surface core parts diameter.Core parts are equally at the U.S. Patent application No.13/528 transferring the possession of this assignee, and be described in 518, this application entirety is incorporated into this by reference.
On-plane surface core parts can be arranged on center line of bit or be adjacent to center line of bit, and namely spacing distance is from 0 to the radius value (for symmetrical inserts) of on-plane surface core inserts.But, the disclosure also comprises the asymmetric on-plane surface core inserts (similar with the shape shown in Fig. 8) of use, in this case, distance center line of bit distance can from zero to the summit and inserts center line of the radius of on-plane surface core inserts and circular cone cut end side-play amount sum.In addition, although the embodiment shown in Fig. 5 shows on-plane surface core parts 524 and is panelized into and makes its axis coaxial or parallel with drill bit longitudinal axis 505, be positioned at the scope of the present disclosure equally be the center line of core on-plane surface inserts and drill bit longitudinal axis at angle.When using asymmetric on-plane surface core inserts, this at angle to inlay may be useful.In addition, on-plane surface core inserts can be mounted to make the cylindric substrate 526 of on-plane surface core parts 524 be ± 0.1 inch from the yardstick upwards of bit face in the hole in bit central region, and preferably concordant with bit face in various embodiments.
According to the disclosure, the first radial cuts element 522 can be conical cutting element.In particular embodiments, the radius of curvature of the rounded vertex of this conical cutting element can be 0.010 to 0.125 inch.In certain embodiments, conical cutting element can be 0.01 at the lower limit of the excursion of the radius of curvature of the first radial position, 0.02,0.04,0.05, in 0.06 or 0.075 inch any one, the upper limit can be 0.05, and 0.06,0.075, in 0.085,0.10 or 0.0125 inch any one.In addition, special embodiment can use cutting element that is asymmetric or that tilt, as shown in Figure 8, wherein, and the axis of the conical cutting tip 135 of conical cutting element 128 and the axis disalignment of base material 134.In addition, also can desirably, conical cutting element to be placed on wing (coning angle for given asymmetric degree and particular circle taper-cut element) according to inclination angle, specific direction, to make to be formed with an angle between the radial penetrale and the line being parallel to drill bit longitudinal axis of conical cutting element.In various embodiments, this angle can be 4 to 45 degree.In other embodiments, this angle can be greater than 0 degree.In certain embodiments, the lower limit of this angle excursion can be any one in 0,2,5,10,15,20 or 30 degree, and the upper limit can be any one in 15,20,25,30,35,40 or 45 degree, and wherein, any lower limit can combinationally use with any upper limit.Conical cutting element by conical cutting element is placed on such radial position, the core weakened of the core in bit central region can be made to be formed in owing to can produce recess in core.
With reference to Fig. 9, the present inventor finds rotating cutting elements 930 and on-plane surface cutting element 920 to combinationally use the cutting action (being illustrated by the broken lines) that single drill bit can be made to have two types: as Fig. 9 schematically shows, the cutting that the pressure pressure break of being undertaken by on-plane surface cutting element 920 formation or planing produce, and the cutting that the shearing undertaken by rotating cutting elements 930 formation produces.
Usually, when on wing rotating cutting elements being arranged on down-hole cutting tool, such as drill bit or reamer reamer, rotating cutting elements can be embedded in cutter recess (or the hole when on-plane surface cutting element) to change the angle on cutter percussion stratum.Such as, the back rake angle (i.e. vertical orientations) of cutter and angle of heel (i.e. lateral position) can be adjusted.Usually, back rake angle is restricted to the angle 150 between cut surface and the line orthogonal with just cut earth formation material being formed in rotating cutting elements 142.As shown in Figure 10, when rotating cutting elements 142 has the back rake angle of zero degree, cut surface 44 is substantially perpendicular to or is orthogonal to earth formation material.When measuring from earth formation material, the cut surface 44 with the cutter 142 of negative back rake angle 150 engages with earth formation material with the angle being less than 90 °.Similarly, when measuring from earth formation material, the cut surface with the rotating cutting elements of positive back rake angle engages with earth formation material with the angle being greater than 90 °.According to each embodiment of the present disclosure, the negative back rake angle of rotating cutting elements can be >5 degree, >10 degree, >15 degree, >20 degree, >25 degree, >30 degree, and/or <10 degree, <15 degree, <20 degree, <25 degree, <30 degree, <35 degree, wherein, the arbitrary upper limit can use with arbitrary lower values.
In addition, in one embodiment, the angle of heel scope of rotating cutting elements can be 0 to ± 45 degree, such as 5 to ± 35 degree, 10 to ± 35 degree or 15 to ± 30 degree.In a special embodiment, the direction (plus or minus) of angle of heel can be chosen based on the distribution of cutting element, that is, spiral or helical structure is arranged and chosen later before according to rotating cutting elements being.In addition, angle of heel can be chosen along the position (such as in conical area, in shoulder regions, in Guan Ding region, etc.) of wing based on cutting element.Such as, in certain embodiments, the scope being placed on the angle of heel of each rotating cutting elements in the Guan Ding of drill bit and/or shoulder regions can be 10 to 30 degree or-10 to-30 and spends.In other embodiments, the angle of heel scope being placed on each rotating cutting elements in the Guan Ding of drill bit and/or shoulder regions can be 20 to 30 degree or-20 to-30 and spends.In certain embodiments, radial direction to be arranged in outside shoulder, namely the scope of the angle of heel of the rotating cutting elements in footpath rule region can be 5 to 35 degree or-5 to-35 and spend.In more specifically embodiment, rotating cutting elements in rule region, footpath can be >5 degree, >10 degree, >15 degree, >20 degree, >25 degree, >30 degree, and/or <10 degree, <15 degree, <20 degree, <25 degree, <30 degree, <35 degree, wherein, these angles arbitrary can be positive or bear, and the arbitrary upper limit can use with arbitrary lower values.In addition, in certain embodiments, rotating cutting elements can be placed in the conical area of drill bit, and angle of heel can be less than 20 degree or be 10 to 15 degree in more specifically embodiment.In various embodiments, cutting element can be permanently connected or can roll, but can have such angle of heel if fix or roll.Can understand clearly, any angle of heel of arbitrary region can be used alone or use with other range combinations any in other region.
But on-plane surface cutting element does not have cut surface, therefore the orientation of on-plane surface cutting element must be variously defined.When considering the orientation of conical cutting element, except the vertical of cutting element body or lateral position, the non-planar geometry of cut end also can affect on-plane surface cutting element how and with which type of angle percussion stratum.Particularly, except affecting the interactional aggressivity of on-plane surface cutting element and stratum, cut end geometry (is in particular, geometry type, apex angle, radius of curvature) have impact on the aggressivity that on-plane surface cutting element clashes into stratum significantly.When conical cutting element as shown in figure 11, back rake angle is defined as being formed in the angle 150 between the axis (being in particular the axis of conical cut end) of conical cutting element 144 and the line orthogonal with just cut earth formation material.As shown in figure 11, be the conical cutting element 144 of zero for back rake angle, the axis of conical cutting element 144 is substantially perpendicular to or is orthogonal to earth formation material.When measuring from earth formation material, the axis with the conical cutting element 144 of negative back rake angle angle 150 engages with the angle that earth formation material becomes to be less than 90 °.Similarly, when measuring from earth formation material, the axis with the conical cutting element 144 of positive back rake angle angle 150 engages with the angle that earth formation material becomes to be greater than 90 °.This orientation can be used to the back rake angle describing all on-plane surface cutting elements.In a special embodiment, the back rake angle angle of on-plane surface cutting element can be zero, or in other embodiments can for negative or positive.In an embodiment, the back rake angle scope of on-plane surface cutting element can be-35 to 35 degree, can be-10 to 10 degree in other embodiments, in other other embodiment, can be zero to 10 degree, can be-5 to 5 degree in other other embodiment.In addition, the back rake angle angle of the on-plane surface cutting element here used in disclosed embodiment can be chosen from the combination of the one or more back rake angle angles within the scope of these.
Except axis is relative to except the orientation on stratum, the aggressivity of on-plane surface cutting element also can be dependent on Vertex angle, or the angle between the leading edge portion depending on stratum and on-plane surface cutting element particularly.For conical cutting element (but, be applied to all molded non-planars, comprise other point or domed shape), because conical cutting element has cone shape, thus there is not leading edge; But the costa of conical cutting surfaces can be confirmed as conical cutting element along with the rotation of the drill bit point the most front in each axial point along conical cut end surface.Change kind of a mode, as shown in figure 12, the sectional view of the conical cutting element that the plane along bit direction is cut out is shown.The costa 145 of the conical cutting element 144 in this plane can be counted as relevant to stratum.The angle of shock of conical cutting element 144 is defined as being formed in the angle 155 between the costa 145 of conical cutting element 144 and just cut stratum.The angle of shock can according to back rake angle and coning angle change, thus, the angle of shock of conical cutting element can be calculated as back rake angle and add the coning angle of half (namely, the angle of shock=(0.5* coning angle)+back rake angle), wherein, if back rake angle 150 is negative as shown in figure 11, so this formula will increase negative value to (0.5* coning angle) value.In an embodiment, the scope of the angle of shock 155 can be about 5 to 100 degree, and can be about 20 to 65 degree in other embodiments.In addition, the angle of shock of the conical cutting element (or other on-plane surface cutting element) here in disclosed embodiment can from choosing within the scope of these.
Such as, the combination in on-plane surface cutting element region and rotating cutting elements region, such as those combinations as above, can be used on the down-hole cutting tool of such as drag bit (such as shown in Figure 4), reamer reamer or Double Circular Bit and so on.According to embodiment of the present disclosure, down-hole cutting tool can have tool body, and tool body has longitudinal axis from wherein extending through and cut end.As used herein, the cut end of downhole tool refers to instrument and contacts with borehole bottom and the longitudinal end cutting bottom, and link is contrary with cut end and closest with drill string instrument being connected to ground installations.Multiple wing can extend in azimuth from tool body, and multiple cutting element can be arranged on multiple wing.Cutting element comprises at least one rotating cutting elements and at least one on-plane surface cutting element, and wherein, this at least one on-plane surface cutting element is arranged in the wing region closest to cut end.In one or more embodiments, on-plane surface cutting element can be conical cutting element or other pointed cutting element.
Such as, in certain embodiments, down-hole cutting tool can be the Double Circular Bit with tool body, and wherein, tool body has the boot segment of the cut end of the instrument of being positioned at and departs from the reamer reamer section of boot segment in the vertical.Multiple guiding wing can extend from the boot segment of tool body, and multiple reamer reamer wing can extend from the reamer reamer section of tool body.Such as, Figure 13 shows the lateral view of the Double Circular Bit according to embodiment of the present disclosure.As shown in the figure, Double Circular Bit 101 comprises boot segment 106, described boot segment 106 there is the guiding wing 108 that extends from it and be positioned at guide wing 108 axially away from the footpath rule pad 112 of the end of the cut end 103 of drill bit 101.Reamer reamer section 107 has the fraising wing 111 from its extension and pad 117 is advised in footpath and boot segment 106 longitudinally departs from.As shown in the figure, boot segment 106 and reamer reamer section 107 separate a fore-and-aft distance, and this fore-and-aft distance can comprise spacer 102.But other Double Circular Bit can have the boot segment adjacent with reamer reamer section.Multiple on-plane surface cutting element (being conical cutting element in an illustrated embodiment) 116 and multiple rotating cutting elements 110 are arranged on and guide on wing 108 and reamer reamer wing 111.In addition, Double Circular Bit 101 has body 114 and the threaded ends 104 contrary with cut end 103.Body 114 can comprise spanner flat 115 or similar item for connecting rotating power source, such as drilling rod or hydraulic motor.
According to embodiment of the present disclosure, at least one on-plane surface cutting element (being conical cutting element in one or more embodiments) can be arranged on and guide on wing and/or reamer reamer wing, and at least one rotating cutting elements can be arranged on guiding wing and/or reamer reamer wing.Such as, Figure 14 shows the rotation profile view of the Double Circular Bit 201 according to embodiment of the present disclosure.Drill bit 201 has boot segment 206 and reamer reamer section 207, and boot segment 206 has the multiple guiding wing 208 from its extension and reamer reamer section 207 has the multiple reamer reamer wings 211 extended from it.On-plane surface cutting element region 216 (region with on-plane surface cutting element of cutting tool) can extend a distance along the bit face of boot segment 206 from the longitudinal axis of drill bit 201, and rotating cutting elements region 210 (region with rotating cutting elements of cutting tool) can extend remaining distance along the guiding wing 208 of boot segment 206.In addition, as shown in the figure, on-plane surface cutting element region 216 can extend a distance along reamer reamer wing 211 from reamer reamer wing 211 and the immediate region of boot segment 206, and the remaining distance of rotating cutting elements region 210 extensible reamer reamer wing 211.But in other embodiments, on-plane surface cutting element region can extend the whole distance guiding wing 208, the whole distance of rotating cutting elements region extensible reamer reamer wing 211.On-plane surface cutting element region and rotating cutting elements region other combination, such as referring to Figure 4 and 5 drag bit described in combination, can be used on the boot segment of Double Circular Bit.
In addition, the various combinations in one or more on-plane surface cutting element region and one or more rotating cutting elements region can be used in the reamer reamer section of Double Circular Bit.Such as, at least one on-plane surface cutting element can be arranged on on the reamer reamer wing in the cut end of instrument immediate on-plane surface cutting element region, and at least one rotating cutting elements can be arranged in the rotating cutting elements region adjacent with on-plane surface cutting element region.In other embodiments, at least one on-plane surface cutting element can be arranged on on the reamer reamer wing in the link of instrument immediate on-plane surface cutting element region, and at least one rotating cutting elements can be arranged on the cut end of instrument in immediate rotating cutting elements region.In addition, on-plane surface cutting element region can be formed on one or more reamer reamer wing.As above with reference to described by Fig. 5, when watching in rotation profile view, on-plane surface cutting element region can overlapping, the same position that is adjacent to or occupies reamer reamer wing.
In addition, in some embodiment of the present disclosure, down-hole cutting tool can for having the reamer reamer of tool body and the multiple wings from tool body extension.The various combinations in one or more on-plane surface cutting element region and one or more rotating cutting elements region, such as, described by the reamer reamer section of reference Double Circular Bit, can be used on reamer reamer cutting tool.
Inventor of the present disclosure has been found that and in cutting tool experiences a shock the region damaged, uses on-plane surface cutting element and in frayed region, use the design of the cutting tool of rotating cutting elements can improve life-span of cutting tool at cutting tool.According to embodiment disclosed herein, on-plane surface cutting element can provide impact property that the is hard and enhancing needed for Complex formation drilling, and rotating cutting elements can be provided in abrasion resistance required in abrasion stratum.Such as, laboratory data and on-the-spot test demonstrate, and the resistance to impact of conical cutting element is four times of traditional PD C cutter, and rotating cutting elements can have the abrasion resistance of enhancing owing to having the better dissipation of heat than traditional PDC cutter.
Although the present invention is described with reference to the embodiment of limited quantity, obtain it will be appreciated by those of skill in the art that of disclosure benefit and can design other embodiment, it can not depart from scope of the present invention disclosed herein.Therefore, scope of the present invention should only be limited by appended claim.
Claims (26)
1. a drill bit, comprising:
Drill body, it has the longitudinal axis and bit face that run through extension;
From multiple wings that drill body extends, wherein, described multiple wing has the wing profile comprising Guan Ding;
Be arranged on the multiple cutting elements on described multiple wing, described multiple cutting element comprises:
Multiple on-plane surface cutting element; And
Multiple rotating cutting elements;
Wherein, described multiple on-plane surface cutting element be arranged at least one wing be positioned at vertical
In on-plane surface cutting element region between axis and hat top.
2. the drill bit of claim 1, wherein, described multiple on-plane surface cutting element has cut end, and described cut end has the taper shape, convex or the female flank surface that stop with round as a ball summit.
3. the drill bit of claim 2, wherein, described multiple on-plane surface cutting element comprises multiple conical cutting element.
4. the drill bit of claim 3, wherein, described multiple conical cutting element has the back rake angle of scope from-35 to 35 degree.
5. the drill bit of claim 1, wherein, at least one rotating cutting elements comprises the cut surface being roughly plane.
6. the drill bit of claim 1, to comprise further in the region be arranged between at least two wings and to have the prostheses cutting element of pointed end.
7. the drill bit of claim 1, wherein, the first radial cuts element be arranged on wing has the angle between the radial penetrale being formed in the first radial cuts element and the line of the longitudinal axis being parallel to drill bit, and wherein, this angle is greater than zero.
8. the drill bit of claim 1, wherein, described multiple rotating cutting elements is arranged in the rotating cutting elements region adjacent with on-plane surface cutting element region.
9. the drill bit of claim 1, wherein, when observing in rotation profile view, described multiple rotating cutting elements is arranged in the rotating cutting elements region overlapping with on-plane surface cutting element region.
10. the drill bit of claim 1, wherein, at least one on-plane surface cutting element rotatably remains on wing.
The drill bit of 11. claims 1, wherein, at least one fixed cutter is arranged in the rule region, footpath of wing profile.
The drill bit of 12. claims 1, wherein, at least one in described multiple wing only comprises on-plane surface cutting element disposed thereon.
The drill bit of 13. claims 1, wherein, at least one in described multiple wing only comprises rotating cutting elements disposed thereon.
14. 1 kinds of down-hole cutting tools, comprising:
Tool body, it has the longitudinal axis and cut end that run through extension;
From multiple wings that tool body extends;
Be arranged on the multiple cutting elements on described multiple wing, described multiple cutting element comprises:
At least one rotating cutting elements; And
At least one on-plane surface cutting element;
Wherein, at least one on-plane surface cutting element described is positioned at the closest with cut end of wing
On-plane surface cutting element region in.
The drill bit of 15. claims 14, wherein, the cut end of described multiple on-plane surface cutting element has the taper shape, convex or the female flank surface that stop with round as a ball summit.
The drill bit of 16. claims 15, wherein, described multiple on-plane surface cutting element comprises multiple conical cutting element.
The cutting tool of 17. claims 14, wherein, at least one rotating cutting elements described and at least one on-plane surface cutting element described are positioned on identical wing.
The cutting tool of 18. claims 14, wherein, at least one rotating cutting elements described is arranged in the rotating cutting elements region adjacent with on-plane surface cutting element region.
The cutting tool of 19. claims 14, wherein, when observing in rotation profile view, at least one rotating cutting elements described is arranged in the rotating cutting elements region overlapping with on-plane surface cutting element region.
The cutting tool of 20. claims 14, wherein, cutting tool is Double Circular Bit, it reamer reamer section comprising boot segment and depart from the vertical with boot segment, wherein, described multiple wing comprises the guiding wing extended from the boot segment of tool body and the reamer reamer wing extended from the reamer reamer section of tool body.
The cutting tool of 21. claims 20, wherein, at least one on-plane surface cutting element described is arranged on and guides on wing, and at least one rotating cutting elements described is arranged on reamer reamer wing.
The cutting tool of 22. claims 20, wherein, at least one on-plane surface cutting element is arranged on cut end immediate on-plane surface cutting element region on reamer reamer wing, and at least one rotating cutting elements is arranged in the rotating cutting elements region adjacent with on-plane surface cutting element region.
The cutting tool of 23. claims 14, wherein, cutting tool is reaming tool.
The cutting tool of 24. claims 14, wherein, at least one on-plane surface cutting element rotatably remains on wing.
The cutting tool of 25. claims 14, wherein, at least one in described multiple wing only comprises on-plane surface cutting element disposed thereon.
The cutting tool of 26. claims 14, wherein, at least one in described multiple wing only comprises rotating cutting elements disposed thereon.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261684412P | 2012-08-17 | 2012-08-17 | |
| US61/684,412 | 2012-08-17 | ||
| US13/836,172 | 2013-03-15 | ||
| US13/836,172 US20140262536A1 (en) | 2013-03-15 | 2013-03-15 | Downhole cutting tools having hybrid cutting structures |
| PCT/US2013/050509 WO2014028152A1 (en) | 2012-08-17 | 2013-07-15 | Downhole cutting tools having hybrid cutting structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104619946A true CN104619946A (en) | 2015-05-13 |
Family
ID=50101390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380046979.XA Pending CN104619946A (en) | 2012-08-17 | 2013-07-15 | Downhole cutting tools having hybrid cutting structures |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104619946A (en) |
| WO (1) | WO2014028152A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112969839A (en) * | 2018-11-12 | 2021-06-15 | 阿特拉钻孔技术有限合伙公司 | Drill bit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464599A (en) * | 2015-07-24 | 2016-04-06 | 四川深远石油钻井工具股份有限公司 | PDC drill bit with directional easy controllability enhancing performance |
| CN116988739B (en) * | 2023-09-26 | 2023-12-26 | 西南石油大学 | High-density PDC drill bit with longitudinal teeth distributed |
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| CN101627178A (en) * | 2007-01-25 | 2010-01-13 | 贝克休斯公司 | Rotary drag bit and methods therefor |
| US20100276145A1 (en) * | 2009-05-04 | 2010-11-04 | Smith International, Inc. | Milling system and method of milling |
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| US5655614A (en) * | 1994-12-20 | 1997-08-12 | Smith International, Inc. | Self-centering polycrystalline diamond cutting rock bit |
| US6206117B1 (en) * | 1997-04-02 | 2001-03-27 | Baker Hughes Incorporated | Drilling structure with non-axial gage |
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| CN112969839A (en) * | 2018-11-12 | 2021-06-15 | 阿特拉钻孔技术有限合伙公司 | Drill bit |
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| WO2014028152A1 (en) | 2014-02-20 |
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Application publication date: 20150513 |