CN106471206A

CN106471206A - Single water channel drill bit and the system using single water channel drill bit

Info

Publication number: CN106471206A
Application number: CN201580021879.0A
Authority: CN
Inventors: 科迪·A·皮尔斯; 迈克尔·D·鲁普; 克里斯蒂安·M·兰贝特
Original assignee: Longyear TM Inc
Current assignee: Longyear TM Inc
Priority date: 2014-04-07
Filing date: 2015-04-06
Publication date: 2017-03-01
Also published as: AU2015244141B2; CA2944907A1; AU2015244141A1; EP3129576A1; CL2016002568A1; PE20161426A1; WO2015157173A1; EP3129576A4

Abstract

The present invention is embodied as including boring bar tool, and described boring bar tool has can increase flushing and bit life, also reduce the axially tapered water channel of blocking simultaneously.Described boring bar tool can have the single recess extending in described cutting face and extend to multiple holes of the inner space of described boring bar tool from described cutting face.It is embodied as the hole-drilling system also including there is boring bar tool, described boring bar tool has single recess and multiple hole.

Description

Single water channel drill bit and the system using single water channel drill bit

Background technology

Technical field

Present invention relates generally to can be used for boring the boring bar tool of geological structure and/or manual construction, and be related to manufacture and Method using such boring bar tool.

Technical background

Drill bit and other boring bar tools are often used in holing for exploration or other purposes in rock and other stratum. A type of drill bit for this generic operation is impregnated bit.Impregnated bit includes can be by comprising powder hard particle materials The substrate formed cutting tip of (such as tungsten carbide) or brill hat.Hard particle materials can be sintered and/or (all with binding agent As copper alloy) infiltration.Additionally, the cutting tip of impregnated bit can be had (impregnated with) grinding cutting to be situated between by impregnated Matter, such as naturally occurring or synthetic diamond.

During drilling operation, grinding cutting medium gradually exposes when support matrix material is worn away.By a support group The abrasion of matter and continuously expose new grinding cutting medium, thus forming cutting tip, can help to provide always sharp keen cutting Cut surface.Impregnated boring bar tool can continue efficiently to cut before the cutting tip of instrument is consumed.Once the cutting portion of instrument Point it is consumed, instrument rust and typically require displacement.

Impregnated bit and most of other kinds of boring bar tool typically require during drilling operation using drilling fluids Or air.Generally, drilling fluids or air pass through drill string and through bit face pumping from surface.Then drilling fluids can pass through Gap between drill string and the wall of a borehole returns to surface.Alternatively, drilling fluids can along drill string and stratum it Between the anchor ring that formed downwards, pump through bit face and returned by drill string.Drilling fluids can play some important function, bag Include and chip is rinsed upwards and leaves boring, remove chip so that grinding cutting medium causes excessive drill bit from bit face Abrasion, lubricates and cooling bit face during holing, and the friction reducing rotary drill column.

Spread all over bit face in order to contribute to pilot bore hole fluid, drill bit will generally include the water channel or logical near cutting face Road, it passes through drill bit from internal diameter to external diameter.Therefore, water channel can concurrently facilitate cooling bit face and wash away chip.Unfortunately, When holing in broken and abrasive layer, or when hole with high permeability, chip may blocking water channel, thus hindering boring to flow The flowing of body.The minimizing advancing to the drilling fluids in outside inside drill bit may result in the removal of chip not enough, the inequality of drill bit Even abrasion, the generation of larger frictional force, drill bit is scorching hot, or can ultimately result in the other problemses of drill bit failures.Additionally, often broken Under broken and abrasiveness surface condition, discrete material will not smoothly be sent in drill string or core barrel.

Present solutions for reducing water channel blocking include increasing the depth of water channel, increase the width of water channel, and Make the side of water channel radially tapered, therefore when water channel extends to external diameter from the internal diameter of drill bit, its width increases.Although these Every kind of can minimizing to a certain extent in method blocks and increases flushing, but they also each present from a level to The various shortcomings of another level.

For example, deeper water channel can reduce the intensity of drill bit, reduces the speed in water channel porch for the drilling fluids, and because This reduces the rinse capability of drilling fluids, and increases due to being related to the additional processing that cuts into water channel in the base substrate of drill bit Manufacturing cost.Broader water channel can reduce the cutting surface of bit face, and therefore reduce the boring performance of drill bit and reduce Drilling fluids are in the speed of water channel porch.Similarly, tapered radially water channel can reduce the cutting surface of bit face and subtract Small bore fluid is in the speed of water channel porch.

It should be appreciated that the many in Present solutions can remove than the external diameter of drill bit bigger percentage ratio from the internal diameter of drill bit Material, thus creating water channel.The bit body volume reducing in inner radius may result in drill bit in the premature abrasion of inner radius.So Premature abrasion may result in drill bit to lose efficacy and increase boring cost by needing more frequently to replace drill bit.

The cutting surface hydropenia of conventional bit leads to smear removal rate to decline, thus leading to the abrasion of cutting surface to increase. Additionally, lacking current also can remove heat extraction from cutting surface in drilling bit high-speed rotary running with minimizing.Known to these Drill bit design is also associated with the contact stress measurements value of relatively low permeability and reduction.

Therefore, conventional water channel haves the shortcomings that many can be solved.Specifically, in the related art, need to drill bit Cutting surface more efficient high velocity fluid flow be provided and remove the drill bit of the heat from cutting surface.In the related art, also Need to provide the drill bit of higher smear removal rate and permeability compared with normal drill bit.

Content of the invention

The present invention be embodied as utilization can provide drilling fluids around the cutting face of boring bar tool improve flowing Boring bar tool, system and method overcome one or more of this area problem.For example, the present invention's is one or more concrete Implement the boring bar tool including there is water channel, it can increase the speed in water channel porch for the drilling fluids, and cuts thus providing The improvement of bits is rinsed.Specifically, the one or more of the present invention are embodied as including the boring with axially tapered water channel Instrument.

For example, of core sampling drill bit is embodied as may include handle and annular bit hat.Annular bit hat may include longitudinal direction Axis, cutting face, inner surface and outer surface.Annular bit hat can limit inner space around longitudinal axis for receiving drill core Sample.Drill bit may also include at least one water channel extending to outer surface from the inner surface of annular bit hat.At least one water channel can For axially tapered, thus the longitudinal size of the outer surface that at least one water channel is preced with annular bit exists more than at least one water channel Longitudinal size at the inner surface of annular bit hat.

In addition, the cutting tip being embodied as may include handle and being fixed to handle of boring bar tool.Cutting tip may include to be cut Bevel, inner surface and outer surface.Boring bar tool may also include one or more water channels, and described water channel is by the interior table from cutting tip Face extend to outer surface the first side surface, from the inner surface of cutting tip extend to outer surface second, opposite, side surface, with And extend and extend to from the inner surface of cutting tip the top table of outer surface between the first side surface and the second side surface Face limits.Top surface can along substantially from cutting face towards the direction of handle from the inner surface of cutting tip to its external surface tapered.

Additionally, earth-boring bit be embodied as may include handle and be fixed to handle and extend outwardly away from handle brill hat.Boring hat can Including cutting face, inner surface and outer surface.Drill bit may also include multiple recesses, and described recess is prolonged with the first distance at inner surface Reach in cutting face and extended in cutting face with second distance at outer surface.Second distance can more than described first away from From, and multiple recess can extend to outer surface from the inner surface boring hat.

Formed the method for drill bit with axially tapered water channel be embodied as can relate to be formed by hard particle materials and The annular bit hat that multiple grinding cutting media are constituted.The method may also refer to multiple plugs are placed in annular bit hat.Multiple plugs In each plug can increase longitudinal size from first end to opposed second ends along its length.The method can be additionally related to use Binder material infiltration annular bit hat, this binder material is configured to be bonded to hard particle materials and multiple grinding cutting is situated between Matter.Additionally, the method can relate to remove multiple plugs to expose multiple axially tapered water channels from the annular bit hat of infiltration.

Apart from the above, hole-drilling system may include rig, be adapted for secure to rig and the drill string that rotated by rig and It is adapted for secure to the drill bit of drill string.Drill bit may include handle and annular bit hat.Annular bit hat may include longitudinal axis, cutting face, interior Surface and outer surface.Annular bit hat can limit inner space around longitudinal axis for receiving drill core sample.Annular bit is preced with May also include at least one water channel extending to outer surface from inner surface.At least one water channel can be axially tapered, thus extremely A few water channel is more than at least one water channel at the inner surface that annular bit is preced with the longitudinal size of the outer surface that annular bit is preced with Longitudinal size.

In one aspect, the core sampling drill bit being to have longitudinal axis disclosed herein.Core sampling drill bit can wrap Include handle and annular bit hat.Annular bit hat can be around the longitudinal axis of drill bit.Annular bit hat can have cutting face, inner surface and appearance Face.Annular bit hat and handle can coordinate to limit the inner space being configured to receiving drill core sample around longitudinal axis.Annular Bore hat and can limit single recess, and recess can radially extend from the inner surface to outer surface.Recess can with respect to longitudinal axis from Cutting face axially extends at least a portion of annular bit hat.Annular bit hat can limit multiple holes further.In multiple holes Each hole can be enclosed in annular bit hat between the interior and exterior surfaces.At least one of multiple holes Kong Kecong cutting face is prolonged Reach inner space.Also disclose the hole-drilling system including drill bit.

The exemplary other feature and advantage being embodied as of the present invention will be set forth in the description below, and will partly It is clear that or can be known by such exemplary practice being embodied as from this description.By wanting in appended right The apparatus particularly pointing out in asking and combination, can achieve and obtain such feature and advantage being embodied as.By description below And claims, these and other features will become clear from, or can pass through the such exemplary tool being listed herein below Body implement practice and know.

Brief description

In order to describe the mode of the above and other advantages and features that can obtain the present invention, will be by reference to shown in accompanying drawing Only certain embodiments of the present invention, come the present invention being briefly discussed above more particularly described below.It should be pointed out that accompanying drawing do not press than Example is drawn, and for the purpose of illustration, is typically designated by like reference numerals in the element of all in figure similar structures or function. It should be appreciated that these accompanying drawings only describe the exemplary embodiments of the present invention, and therefore it is not considered limiting of its scope, will Describe and illustrate the present invention by using accompanying drawing with supplementary features and details, wherein：

Fig. 1 illustrates the perspective view of the boring bar tool according to the axially tapered water channel of the inclusion being embodied as of the present invention；

Fig. 2 illustrates the upward view of the boring bar tool of Fig. 1；

Fig. 3 illustrates the partial sectional view of the boring bar tool of Fig. 2 along the hatching 3-3 intercepting of Fig. 2；

Fig. 4 illustrates the boring bar tool according to the axially tapered and tapered radially water channel of the inclusion being embodied as of the present invention Perspective view；

Fig. 5 illustrates the upward view of the boring bar tool of Fig. 4；

Fig. 6 illustrates the partial sectional view of the boring bar tool of Fig. 5 along the hatching 6-6 intercepting of Fig. 5；

Fig. 7 illustrates the axially tapered brill with the tapered water channel of biradial of another inclusion being embodied as according to the present invention The upward view of hole instrument；

Fig. 8 illustrates the brill according to the axially tapered recess of the inclusion being embodied as of the present invention and axially tapered closure slot The perspective view of hole instrument；

Fig. 9 illustrates the sectional view of the boring bar tool of Fig. 8 along the hatching 9-9 intercepting of Fig. 8；

Figure 10 illustrates the partial sectional view of the boring bar tool of Fig. 9 along the hatching 10-10 intercepting of Fig. 9；

Figure 11 illustrates the boring according to the inclusion being embodied as of the present invention with the boring bar tool of axially tapered water channel The schematic diagram of system；

Figure 12 illustrate according to the present invention be embodied as forming the boring bar tool with axially tapered water channel The perspective view of plug；

Figure 13 illustrates the side view of the plug of Figure 11；And

Figure 14 illustrates the top view of the plug of Figure 11.

Figure 15 illustrates the perspective view as disclosed herein with the exemplary drill bit of single recess and multiple hole.

Figure 16 illustrates the bottom perspective view of the drill bit of Figure 15.

Figure 17 illustrates the top view of the drill bit of Figure 15.

The separation of the side surface of annular bit hat that Figure 18 illustrates as disclosed herein to be defined in single recess in drill bit, The view of local transparent.As illustrated, multiple wear members are partially embedded to limit the lower surface of recess and the side of drill bit The part on surface.Be embedded in lower surface and side surface wear member partly shown in broken lines, and from lower surface and side The part of the wear member that surface extends is shown in solid.

Figure 19 illustrates the perspective view as disclosed herein with another exemplary drill bit of single recess and multiple hole.

Figure 20 illustrates the top view of the drill bit of Figure 19.

Figure 21 illustrates the perspective view as disclosed herein with another exemplary drill bit of single recess and multiple hole.

Figure 22 illustrates the top view of the drill bit of Figure 21.

Specific embodiment

Being embodied as of the present invention is related to provide drilling fluids to improve flowing around the cutting face of boring bar tool Boring bar tool, system and method.For example, the one or more of the present invention are embodied as including the boring bar tool with water channel, its The speed in water channel porch for the drilling fluids can be increased, and thus provide the flushing of the chip of improvement.Specifically, the present invention One or more be embodied as including the boring bar tool with axially tapered water channel.

In view of this disclosure it will be appreciated that according to the present invention one or more be embodied as axially tapered Water channel can ensure that water channel the opening in the inner surface of boring bar tool be less than opening in the outer surface of boring bar tool for the water channel. Therefore, water channel can be by increasing the speed in the water channel porch in the inner surface of boring bar tool for the drilling fluids Lai as nozzle Work.The ability that axially tapered water channel increases the speed in water channel porch for the drilling fluids can provide the increase of chip to rush Wash, and can help to prevent the blocking of water channel.Additionally, axially tapered water channel can provide drilling fluids improvement flow and not The notable bit body volume sacrificed in inner radius or the cutting surface of reduction bit face.Therefore, one or more tools of the present invention The axially tapered water channel that body is implemented can provide the boring performance of raising and increased drill life.

Additionally or alternatively, in order to have axially tapered water channel, at one or many of the present invention Individual be embodied as, boring bar tool may include axially and radially tapered water channel (or in other words, double tapered water channels).Mirror In this disclosure it will be appreciated that double tapered water channel can help ensure that water channel at it from the inner surface of boring bar tool Increase the size of every axis during the outer surface extending to boring bar tool.The increase size of double tapered water channels can reduce chip and stay Probability in water channel, and therefore improve the boring performance of boring bar tool.

Additionally, double tapered water channels can allow the relatively draw opening in inner radius, also allow in outer radius relatively simultaneously Big water channel opening.Therefore, the one or more of the present invention are embodied as increasing the amount of the host material in inner radius, and from And the life-span contributing to increase drill bit is also provided with the flushing imitated simultaneously.The increase life-span of such drill bit can make drill string by minimizing Disengage to reduce boring cost to replace the needs of the drill bit of premature abrasion from boring.

Boring bar tool as herein described can be used for rock cutting, subsurface mineral stratum, pottery, Colophonium, concrete and its His hard material.These boring bar tools may include for example core sampling drill bit, drag bit, roller cone drill bits, reamer, regulator, Housing or lever brake watt (rod shoe) etc..For the ease of description, accompanying drawing and to comprise corresponding text interpretation hereinafter impregnated The example of core sampling drill bit, and form such drill bit and the method using such drill bit.However, in view of in disclosure herein Hold it will be appreciated that the system of the present invention, method and apparatus can be made together with other boring bar tools (such as those described above) With.

Referring now to accompanying drawing, Fig. 1 and Fig. 2 is shown respectively perspective view and the top view of boring bar tool 100.More particularly, Fig. 1 and Fig. 2 illustrates the impregnated core sampling drill bit 100 with axially tapered water channel being embodied as according to the present invention.As Shown in Fig. 1, drill bit 100 may include handle or base substrate 102, and it is configurable to drill bit 100 is connected to the part of drill string.Drill bit 100 may also include cutting tip or bore hat 104.

Fig. 1 and Fig. 2 also illustrates that drill bit 100 can limit inner space around its center axis 106 for receiving drill core Sample.Therefore, handle 102 and bore both hats 104 can have by inner surface 107 and outer surface 108 limit generally annular in shape.Cause This, drilled material piece may pass through the inner space of drill bit 100 and is upward through the drill string of attachment.Drill bit 100 can be for appointing What size, and therefore can be used for collecting the drill core sample of any size.Although drill bit 100 can have any diameter and can use In removing and collect the drill core sample with any required diameter, but in some are embodied as, the diameter of drill bit 100 can be about In the range of 1 inch to about 12 inches.Same although the otch of drill bit 100 (that is, the radius of outer surface deducts the half of inner surface Footpath) can be any width, but be embodied as according to some, otch can be in the range of about 1/4 inch to about 6 inches.

Bore hat 104 to be configurable to during boring procedure material requested be cut or holes.Specifically, drill bit 100 brill hat 104 may include cutting face 109.Cutting face 109 is configurable to rotate in drill bit 100 and be advanced to stratum When middle, material is holed or cut.As depicted in figs. 1 and 2, in one or more being embodied as, cutting face 109 can be wrapped Include the substantially axial multiple grooves 110 extending in cutting face 109.Groove 110 can help to allow quickly opening of green bit 100 Dynamic.In being optionally embodied as, cutting face 109 may not include groove 110 or may include other features to contribute to boring Hole process.

Cutting face 109 may also include water channel, this water channel can allow drilling fluids or other lubricants flow through cutting face 109 with Contribute to providing cooling during holing.For example, Fig. 1 illustrates to bore hat 104 and may include to prolong in generally axial direction from cutting face 109 Reach the multiple recesses 112 boring in hat 104 of drill bit 100.In addition, recess 112 can extend to from the inner surface 107 boring hat 104 Bore the outer surface 108 of hat 104.As water channel, recess 112 can allow drilling fluids to flow to brill from the inner surface 107 boring hat 104 The outer surface 108 of hat 104.Therefore, recess 112 can allow drilling fluids to rush chip and chip from the inner surface 107 of drill bit 100 Wash outer surface 108, and also provide cooling to cutting face 109.

Bore hat 104 and can have any amount of recess, it provides the desired amount of fluid/chip stream and also allows for boring hat 104 maintain required structural intergrity.For example, Fig. 1 and Fig. 2 illustrates that drill bit 100 includes nine recesses 112.In view of the public affairs of this paper Open content it will be appreciated that the present invention does not so limit.In other being embodied as, it is recessed that drill bit 100 may include at least one Mouth or up to 20 or more recesses, this depends on required configuration and stratum hole to be drilled.In addition, recess 112 can be preced with around boring 104 girth is evenly or unevenly spaced apart.For example, Fig. 2 illustrates around the girth equally spaced from each other nine boring hat 104 Individual recess 112.However, in being optionally embodied as, recess 112 can interlock or in other words will not be evenly spaced apart.

As depicted in figs. 1 and 2, each recess 112 can be by least three surface 112a, and 112b, 112c limit.Specifically Say, each recess 112 can be limited by the first side surface 112a, opposite flank 112b and top surface 112c.The present invention's During some are embodied as, side surface 112a, each in 112b can be along the direction of the inner surface being approximately perpendicular to brill hat 104 from brill The inner surface 107 of hat 104 extends to the outer surface 108 boring hat 104, as shown in Figure 2.Therefore, some in the present invention are specifically real Shi Zhong, width 114 at the outer surface 108 boring hat 104 for each recess 112 can be substantially equal to each recess 112 and boring hat 104 Inner surface 107 at width 116.In other words, each between the first side surface 112a and the second side surface 112b is recessed Mouth 112 can be substantially equal between the first side surface 112a and the second side surface 112b in the circumferential distance 114 at outer surface 108 Circumferential distance 116 at inner surface 107 for each recess 112.Optional in the present invention is embodied as, in following article more detailed Carefully explain, side surface 112a, one or more of 112b can have radially and/or circumferentially taper.

Therefore, recess 112 can have allow itself it is anticipated that operation any shape.Specifically, the shape of recess 112 Can be changed according to the characteristic on the characteristic needed for drill bit 100 or stratum hole to be drilled with configuration.For example, Fig. 2 illustrates when from cutting When face 109 is observed, recess can have rectangular shape.However, in being optionally embodied as, recess can have square, triangle Shape, circle, trapezoidal, polygon, elliptical shape or any combination of them.

Additionally, recess 112 can have allow itself it is anticipated that operation any width or length.For example, Fig. 2 illustrates recess 112 can have length more than its width (that is, the distance between opposite flank 112a and 112b) (that is, from inner surface 107 to The distance of outer surface 108).However, being embodied as in the optional of the present invention, recess 112 can have the width more than its length, Or it is substantially equal to the width of its length.

Additionally, the independent recess 112 boring in hat 104 is configurable to equably there is same size and shape, or optional Ground has different sizes and shapes.For example, Fig. 1-Fig. 3 illustrates that all recesses 112 boring in hat 104 have same size and structure Type.However, in other being embodied as, each recess 112 boring hat 104 can have different size and configuration.For example, one In being embodied as, drill bit 100 may include around the alternate two kinds of various sizes of recesses 112 of girth boring hat 104.

As it was previously stated, water channel (that is, recess 112) can be axially tapered.Specifically, as shown in figure 3, each recess 112 top surface 112c can be along substantially from cutting face 109 towards the direction of handle 102 from inner surface 107 to outer surface 108 gradually Contracting.In other words, the height of each recess 112 or longitudinal size can extend from the inner surface 107 boring hat 104 with recess 112 Increase to outer surface 108.Therefore, as shown in figure 3, in some are embodied as, each recess 112 is at outer surface 108 Longitudinal size 124 can be more than longitudinal size 120 at inner surface 107 for each recess 112.In other words, each recess 112 can Extend in cutting face 109 with the first distance 120 at inner surface 107 and extended with second distance 124 at outer surface 120 To in cutting face 109, wherein second distance 124 is more than the first distance 120.

In view of this disclosure is it will be appreciated that the axial taper of recess 112 can help ensure that each recess 112 It is less than opening at the outer surface 108 boring hat 104 for each recess 112 in the opening at inner surface 107.This difference of opening size Different can drilling fluids be delivered to bore hat 104 outer surface 108 when increase its speed at inner surface 107.Therefore, as above institute State, the axial taper of recess 112 can provide the more effective flushing of chip and the cooling in cutting face 109.Additionally, the increasing of recess 112 Plus size may also help ensure that when drilling fluids force chip from inner surface 107 to outer surface 108, chip will not block or It is blocked in recess 112.

In addition, as shown in Figures 2 and 3, the axial taper of recess 112 can provide increased size not subtract to recess 112 The size in little cutting face 109.The present invention one or more be embodied as in it will be appreciated that the increase surface in cutting face 109 Long-pending can offer is more effectively holed.Additionally, the axial taper of recess 112 can provide flushing and the cooling of increase, also do not subtract simultaneously Bradawl is preced with volume at inner surface 107 for the material.Bore hat increase volume at inner surface 107 for the material to can help to increase drill bit 100 drill life.

In addition to recess 112, bore hat 104 and may include other feature, described feature can further help in will hole Fluid or other lubricants are directed to cutting face 109, or are directed to outer surface 108 from the inner surface 107 boring hat 104.For example, scheme 1- Fig. 3 illustrates that drill bit 110 may include and extends radially into the multiple grooves 122,124 boring in hat 104.Specifically, the present invention's During some are embodied as, drill bit 100 may include the multiple inside grooves 122 radially extending from inner surface 107 towards outer surface 108.Many Individual inside groove 122 can help to guide drilling fluids towards cutting face 109 from handle 102 along the inner surface 107 of drill bit 100.As Shown in Fig. 1-Fig. 3, some in the present invention are embodied as, and inside groove 122 can be along boring the inner surface 107 of hat 104 from handle 102 axle To extending to recess 112.Therefore, inside groove 122 can help to for drilling fluids to be directed to recess 112.Optionally it is being embodied as In, inside groove 122 can extend to cutting face 109 from handle 102, or extends even along handle 102.

In addition Fig. 1-Fig. 3 illustrates, in some are embodied as, drill bit 100 may include multiple water jackets 124.Water jacket 124 can be from The outer surface 108 boring hat 104 radially extends towards inner surface 107.Multiple water jackets 124 can help to drilling fluids along drill bit 100 outer surface 108 guides towards handle 102 from recess 112.As shown in Figure 1-Figure 3, some in the present invention are embodied as, Water jacket 124 can axially extend to handle 102 along outer surface 108 from recess 112.In being optionally embodied as, water jacket 124 can be from Cutting face 109 extends to handle 102, or extends even along handle 102.

As it was previously stated, the one or more of the present invention are embodied as may include double tapered water channels.For example, Fig. 4-Fig. 6 shows Go out the various views of the boring bar tool 200 including double tapered water channels.Specifically, Fig. 4 illustrates there is double tapered recesses The perspective view of core sampling drill bit 200, Fig. 5 illustrates its upward view, and Fig. 6 illustrates its partial sectional view.Similar to drill bit 100, drill bit 200 may include handle 202 and bores hat 204.

Bore hat 204 can have by inner surface 207 and outer surface 208 limit generally annular in shape.Bore hat 204 can in addition from Handle 202 extends and terminates at cutting face 209.As shown in figure 4, some in the present invention are embodied as, cutting face 209 can edge The direction being approximately perpendicular to the longitudinal axis 206 of drill bit 200 extends to outer surface 208 from inner surface 207.It is embodied as at some In, cutting face 209 may include multiple grooves 210.Bore hat 204 and may also include multiple double tapered water channels 212, following article is more detailed Ground is explained.

As it was previously stated, drill bit 200 may include double tapered water channels.For example, Fig. 5 illustrate in recess 212 each may include Radial direction taper in addition to axial taper.More particularly, each recess 212 can be by least three surface 212a, 212b, 212c Limit.Specifically, each recess 212 can be limited by the first side surface 212a, opposite flank 212b and top surface 212c. Some in the present invention are embodied as, the first side surface 212a can along be approximately perpendicular to the direction of the inner surface boring hat 204 from The inner surface 207 boring hat 204 extends to the outer surface 208 boring hat 204, as shown in Figure 5.

As it was previously stated, water channel (that is, recess 212) can be tapered radially.Specifically, as shown in figure 5, each recess 212 the second side surface 212b can along the substantially clockwise direction of the girth around cutting face 209 from inner surface 207 to outer surface 208 is tapered.As used herein, term " clockwise " and " counterclockwise " refer to when observing the cutting face of drill bit with respect to drill bit The direction of longitudinal axis.Therefore, the width of each recess 212 can extend to from the inner surface 207 boring hat 204 with recess 212 Outer surface 208 and increase.Therefore, as shown in figure 5, in some are embodied as, each recess 212 width at outer surface 208 Degree 214 can be more than width 216 at inner surface 207 for each recess 212.In other words, in the first side surface 212a and second Circumferential distance 214 at outer surface 208 for each recess 212 between side surface 212b can more than in the first side surface 212a and Circumferential distance 216 at inner surface 207 for each recess 212 between second side surface 212b.

In view of this disclosure is it will be appreciated that the radial direction taper of recess 212 can ensure that each recess 212 in interior table Opening at face 207 is less than opening at the outer surface 208 boring hat 204 for each recess 212.This difference of opening size can be Drilling fluids increase its speed at inner surface 207 when being delivered to the outer surface 208 boring hat 204.Therefore, as described above, recessed The radial direction taper of mouth 212 can provide the more effective flushing of chip and the cooling in cutting face 209.Additionally, the increase width of recess 212 May also help ensure that chip will not block or be blocked in when drilling fluids force chip from inner surface 207 to outer surface 208 In recess 212.

Fig. 4-Fig. 6 illustrates that the radial direction taper of recess 212 can be formed by the second tapered side surface 212b.It should be appreciated that making Select for another, the first side surface 212a can have taper.For example, the first side surface 212a can be along around cutting face 209 Girth direction substantially counterclockwise tapered to outer surface 208 from inner surface 207.In addition, in some are embodied as, the first side Surface 212a and the second side surface 212b both of which can have along the substantially clockwise direction of girth around cutting face 209 from interior Surface 207 extends to the taper of outer surface 208.In such being embodied as, the radial direction taper of the second side surface 212b can be following The mode of stating has the taper bigger than the first side surface 212a：The width of recess 212 extends to from inner surface 207 with recess 212 Outer surface 208 and increase.

As it was previously stated, in addition to tapered radially, water channel (that is, recess 212) can be axially tapered.Specifically, such as Shown in Fig. 6, the top surface 212c of each recess 212 can along substantially from cutting face 209 towards the direction of handle 202 from inner surface 207 is tapered to outer surface 208.In other words, the longitudinal size of each recess 212 can be with recess 212 from the interior table boring hat 204 Face 207 extends to outer surface 208 and increases.Therefore, as shown in fig. 6, in some are embodied as, each recess 212 is in appearance Longitudinal size 224 at face 208 can be more than longitudinal size 220 at inner surface 207 for each recess 212.In other words, each Recess 212 can be extended in cutting face 209 with the first distance 220 at inner surface 207 and at outer surface 208 with second away from Extend in cutting face 209 from 224, wherein second distance 224 is more than the first distance 220.

In view of this disclosure is it will be appreciated that the axial taper of recess 212 can help ensure that each recess 212 It is less than opening at the outer surface 208 boring hat 204 for each recess 212 in the opening at inner surface 207.This difference of opening size Different can drilling fluids be delivered to bore hat 204 outer surface 208 when increase its speed at inner surface 207.Therefore, as above institute State, the axial taper of recess 212 can provide the more effective flushing of chip and the cooling in cutting face 209.Additionally, the increasing of recess 212 Plus size may also help ensure that when drilling fluids force chip from inner surface 207 to outer surface 208, chip will not block or It is blocked in recess 212.

In view of this disclosure it will be appreciated that double tapered recess 212 can ensure that recess 212 at it from drill bit 200 Inner surface 207 extend to the size increasing every axis (that is, radial and axial both) during outer surface 208.Double tapered recessed The increase size of mouth 212 can reduce the probability that chip is stayed in recess 212, and therefore improves the boring performance of drill bit 200. Additionally, as it was previously stated, the increase size of double tapered recess 212 can help to make volume at inner surface 107 for the host material Maximize, thus the life-span of drill bit 200 can be increased by the premature bit wear reducing at inner surface 207.

In addition to water channel, brill hat 204 may include the multiple grooves for pilot bore hole fluid, similar to herein in above phase For the groove described in drill bit 100.For example, some in the present invention are embodied as, and drill bit 200 may include can be from inner surface 207 The multiple inside grooves 222 radially extending towards outer surface 208.Multiple inside grooves 222 can help to drilling fluids along drill bit 200 Inner surface 207 guides towards cutting face 209 from handle 202.As Figure 4-Figure 6, some in the present invention are embodied as, inside groove 222 can axially extend to recess 212 along inner surface 207 from handle 202.Therefore, inside groove 222 can help to guide drilling fluids To recess 212.

In addition, boring hat 204 to may include full inside groove 222a.As shown in figure 4, full inside groove 222a can extend to cutting from handle 202 Face 209 and do not intersect with recess 212.Similarly, drill bit 200 may include water jacket 224 and full water jacket 224a.Water jacket 224 can be from Handle 202 extends to recess 212, and full water jacket 224a can be extended to cutting face 209 from handle 202 and not intersected with recess 212.Can Being embodied as of choosing, full inside groove 222a and/or full water jacket 224a can extend to cutting face 209 and also along recessed from handle 202 The side surface 212a of mouth 212,212b run.

As it was previously stated, being embodied as in the one or more of the present invention, the water channel of boring bar tool can have radial direction taper. For example, Fig. 4-Fig. 6 illustrates the recess 212 with the second side surface 212b, and this second side surface has radial direction taper.As in addition A kind of selection, two side surfaces all can have radial direction taper.For example, Fig. 7 illustrates the core sampling including double tapered recesses 312 The upward view of drill bit 300, wherein side surface 312a, are respectively provided with radial direction taper both in 312b.

Similar to herein in others as discussed above drill bit, drill bit 300 may include handle 302 and bores hat 304.Boring hat 304 can Have by inner surface 307 and outer surface 308 limit generally annular in shape.Bore hat 304 therefore can limit around central axis 306 Space for receive drill core sample.Bore hat 304 in addition to extend from handle 302 and terminate at cutting face 309.Cutting face 309 may include the multiple grooves 310 extending wherein.In addition, drill bit 300 may include inside groove 322 and water jacket 324 for around Drill bit 300 pilot bore hole fluid.

Additionally, as shown in fig. 7, the second side surface 312b of each recess 312 can along the girth around cutting face 309 substantially Clockwise direction is tapered to outer surface 308 from the inner surface 307 boring hat 304.In addition, the first side surface of each recess 312 312a can along the direction substantially counterclockwise of the girth around cutting face 309 from the inner surface 307 boring hat 304 to outer surface 308 gradually Contracting.Therefore, the width of each recess 312 can extend to outer surface 308 with recess 312 from the inner surface 307 boring hat 304 and increase Plus.

Therefore, as shown in fig. 7, in some are embodied as, width 314 at outer surface 308 for each recess 312 can be big In width 316 at inner surface 307 for each recess 312.In other words, in the first side surface 312a and the second side surface 312b Between circumferential distance 314 at outer surface 308 for each recess 312 can be more than in the first side surface 312a and the second side surface Circumferential distance 316 at inner surface 307 for each recess 312 between 312b.

Extend into recessed in the cutting face boring hat herein always in each in above-described axially tapered water channel Mouthful.In view of this disclosure is it will be appreciated that the present invention may include the various other or other water with axial taper Road.For example, one or more boring bar tools being embodied as of the present invention may include one or more envelopes with axial taper Close fluid slot, entitled " the Core Drill Bit with Extended Crown that on December 14th, 1 submits to The U.S. Patent Application Serial Number of Longitudinal dimension (have and stretch the coring bit boring hat longitudinal size) " Sealing fluid slit described in 11/610,680, disclosure of which is incorporated by reference herein in its entirety accordingly.

For example, Fig. 8-Figure 10 illustrates the core sampling including axially tapered recess and axially tapered closure slot The various views of drill bit 400.Similar to herein in others as discussed above drill bit, drill bit 400 may include handle 402 and bores hat 404. Bore hat 404 can have by inner surface 407 and outer surface 408 limit generally annular in shape.Bore hat 404 can in addition prolong from handle 402 Stretch and terminate at cutting face 409.In some are embodied as, cutting face 409 may include the multiple grooves extending wherein 410, as Figure 8-Figure 10.

As shown in figure 8, drill bit 400 may include configuration similar to above in relation to the double tapered recess described in Fig. 4-Fig. 6 212 double tapered recess 412.Therefore, recess 412 may include top surface 412c, and this top surface can be along substantially from cutting Face 409 is tapered to outer surface 408 from inner surface 407 towards the direction of handle 402.In addition, the first side surface of each recess 412 412a can extend to brill hat 404 along the direction being approximately perpendicular to the inner surface boring hat 404 from the inner surface 407 boring hat 404 Surface 408.Additionally, the second side surface 412b of each recess 412 can be along the substantially clockwise side of the girth around cutting face 409 To tapered to outer surface 408 from inner surface 407.

In addition to double tapered recesses 412, drill bit may include multiple closure slot 430.Following article is explained in greater detail, Closure slot 430 can have axially and/or radially taper.It should be appreciated that denuded by boring due to boring hat 404, so recess 412 can be worn.Carry out with abrasion, closure slot 430 can become to be exposed at cutting face 409 and therefore become recessed Mouthful.It should be appreciated that the configuration of drill bit 400 therefore can allow the longitudinal size boring hat 404 to stretch and lengthen, and substantially do not reduce The structural intergrity of drill bit 400.The stretching, extension longitudinal size boring hat 404 can then allow drill bit 400 to last much longer and need Less to load and to disengage boring to replace drill bit 400.

Specifically, Fig. 8 illustrates to bore hat 404 and may include to extend a spacing from cutting face 409 towards the handle 402 of drill bit 400 From multiple closure slot 430.In addition, closure slot 430 can extend to, from the inner surface 407 boring hat 404, the appearance boring hat 404 Face 408.As water channel, closure slot 430 can allow drilling fluids from the inner surface 407 boring hat 404 flow to brill hat 404 Surface 408.Therefore, closure slot 430 can allow drilling fluids to be flushed to chip and chip from the inner surface 407 of drill bit 400 Outer surface 408, and also provide cooling to cutting face 409.

Bore hat 404 and can have any amount of closure slot 430, it provides the desired amount of fluid/chip stream or brill hat vertical To size, also allow for boring the structural intergrity needed for hat 404 maintains simultaneously.For example, Fig. 8 and Figure 10 illustrates that drill bit 400 may include Six closure slot 430.In view of this disclosure is not it will be appreciated that the present invention so limits.In other concrete reality Shi Zhong, drill bit 400 may include at least one closure slot or up to 20 or more closure slot, this depend on required configuration and Stratum hole to be drilled.In addition, closure slot 430 evenly or unevenly can be spaced apart around the girth boring hat 404.For example, scheme 8- Figure 10 illustrates around the girth closure slot equally spaced from each other 430 boring hat 404.However, being optionally embodied as In, closure slot 430 can be interlocked or in other words will not be evenly spaced apart.

As shown in figure 8, each closure slot 430 can be limited by four surfaces 430a, 430b, 430c and 430d.Specifically Say, each closure slot 430 can be by the first side surface 430a, opposite flank 430b, top surface 430c and opposing floor portion table Face 430d limits.Some in the present invention are embodied as, side surface 430a, and each in 430b can bore hat along being approximately perpendicular to The direction of 404 inner surface extends to the outer surface 408 boring hat 404 from the inner surface 407 boring hat 404.Optional in the present invention In being embodied as, explain as explained in greater detail below, side surface 430a, one or more of 430b can have radially and/or Circumferential taper.

Therefore, closure slot 430 can have and allows it is anticipated that any shape of operation, and this shape can be according to brill The characteristic on the characteristic needed for 400 or stratum hole to be drilled and change.For example, Fig. 9 illustrates that closure slot can have trapezoidal shape. However, in being optionally embodied as, closure slot 430 can have square, triangle, circle, rectangle, polygon or ellipse Round-shaped, or any combination of them.

Additionally, closure slot 430 can have allow itself it is anticipated that operation any width or length.For example, Fig. 9 illustrates Closure slot 430 can have length more than its width (that is, the distance between opposite flank 430a and 430b) (that is, from interior The distance of outer surface 408 is arrived on surface 407).Additionally, the independent closure slot 430 bored in hat 404 is configurable to equably to have Same size and shape, or alternatively there are different sizes and shapes.For example, Fig. 8-Figure 10 illustrates to bore all envelopes in hat 404 Close slit 430 and can have same size and configuration.However, in other being embodied as, boring each closure slot of hat 404 430 can have different size and configuration.

Additionally, boring the water channel that hat 404 may include each row.For example, Fig. 8 illustrate bore hat 404 may include from cutting face 409 with First distance 432 extends to a line recess 412 boring in hat 404.In addition, Fig. 8 illustrates that boring hat 404 may include away from cutting face 409 Second distance 434 starts from boring the first row closure slot 430 in hat 404, and starts away from cutting face 409 the 3rd distance 436 The second row closure slot 430 in brill hat 404.Optional in the present invention is embodied as, and bores hat 404 and may include single row The closure slot 430 of closure slot 430 or multiple row, it is each axially staggered each other.

In some cases, a part for recess 412 can be with the first row closure slot 430 axial overlap.In other words, One distance 432 can be more than second distance 434.Similarly, a part for the closure slot 430 in the first row can with the second row in Closure slot axial overlap.In view of this disclosure is it will be appreciated that the axial overlap of water channel 412,430 can help to Guarantee that the first row closure slot 430 will be opened to become recess 412 before recess 412 is denuded during boring completely, from And allow drill bit 400 to cut with remaining valid when drill bit 400 is denuded.

In addition, as shown in figure 8, the closure slot 430 in the first row can be from recess 412 circumferential offset.Similarly, the second row In closure slot 430 can closure slot 430 from the first row and recess 412 circumferential offset.Optionally it is being embodied as In, one or more of closure slot 430 in the first row and the second row can each other or with recess 412 circumferential alignment.

As it was previously stated, in one or more being embodied as, closure slot 430 can have double tapered.For example, Fig. 9 illustrates Each had radial direction taper in closure slot 430.Some in the present invention are embodied as, and the first side surface 430a can edge The direction being approximately perpendicular to the inner surface 407 boring hat 404 extends to the outer surface boring hat 404 from the inner surface 407 boring hat 404 408, as shown in Figure 9.

Additionally, the second side surface 430b of each closure slot 430 can be substantially clockwise along the girth around brill hat 404 Direction is tapered to outer surface 408 from inner surface 407.In other words, the width of each closure slot 430 can be with closure slot 430 extend to outer surface 408 from the inner surface 407 boring hat 404 and increase.Therefore, as shown in figure 9, in some are embodied as, Each closure slot 430 can be more than each closure slot 430 width at inner surface 407 in the width 414 at outer surface 408 416.In other words, each closure slot 430 between the first side surface 430a and the second side surface 430b is in outer surface 408 The circumferential distance 414 at place can exist more than each closure slot 430 between the first side surface 430a and the second side surface 430b Circumferential distance 416 at inner surface 407.

In view of this disclosure is it will be appreciated that the radial direction taper of closure slot 430 can ensure that each closure slot 430 are less than opening at the outer surface 408 boring hat 404 for each closure slot 430 in the opening at inner surface 407.Open-mouth ruler This very little difference can increase its speed at inner surface 407 when drilling fluids are delivered to the outer surface 408 boring hat 404.Cause This, as described above, the radial direction taper of closure slot 430 can provide the more effective flushing of chip and the cooling of drill bit 400.Additionally, The increase width of closure slot 430 may also help ensure that and forces chip from inner surface 407 to outer surface 408 in drilling fluids When, chip will not block or be blocked in closure slot 430.

Fig. 8-Figure 10 also illustrates that the radial direction taper of closure slot 430 can be formed by the second tapered side surface 430b.Should Understand, alternatively or additionally, the first side surface 430a can have taper.For example, the first side surface 430a Can be tapered to outer surface 408 from inner surface 407 along the direction substantially counterclockwise around the girth boring hat 404.

As it was previously stated, in addition to tapered radially, water channel (that is, closure slot 430) can be axially tapered.Specifically Say, as shown in Figure 10, the top surface 430c of each closure slot 430 can along substantially from cutting face 409 towards the direction of handle 402 Tapered to outer surface 408 from inner surface 407.In other words, the longitudinal size of each closure slot 430 can be with closure slot 430 extend to outer surface 408 from the inner surface 407 boring hat 404 and increase.Therefore, as shown in Figure 10, it is embodied as at some In, longitudinal size 444 at outer surface 408 for each closure slot 430 can be more than each closure slot 430 in inner surface 407 The longitudinal size 442 at place.Or in other words, top surface 430c at outer surface 408 for each closure slot 430 is away from cutting Than each closure slot 430, the top surface 430c at inner surface 407 is farther in face 409.

Alternatively or additionally, lower surface 430d of each closure slot 430 can be along substantially from handle 402 is tapered to outer surface 408 from inner surface 407 towards the direction in cutting face 409.In other words, each closure slot 430 is vertical Outer surface 408 can be extended to closure slot 430 from the inner surface 407 boring hat 404 to size and increase.Or in other words Say, each closure slot 430 lower surface 430d at outer surface 408 than each closure slot 430 at inner surface 407 Lower surface 430d closer to cutting face 409.Therefore, in some are embodied as, closure slot 430 can have biaxially bores Degree, wherein top surface 430c and lower surface 430d are respectively provided with taper.

In view of this disclosure is it will be appreciated that the axial taper of closure slot 430 can ensure that each closure slot 430 are less than opening at the outer surface 408 boring hat 404 for each closure slot 430 in the opening at inner surface 407.Open-mouth ruler This very little difference can increase its speed at inner surface 407 when drilling fluids are delivered to the outer surface 408 boring hat.Therefore, As described above, the axial taper of closure slot 430 can provide the more effective flushing of chip and the cooling of drill bit 404.Additionally, closing The increase size of slit 430 may also help ensure that when drilling fluids force chip from inner surface 407 to outer surface 408, broken Bits will not block or be blocked in closure slot 430.

In view of this disclosure is it will be appreciated that double tapered closure slot 430 can ensure that closure slot 430 at it Increase the size of every axis when the inner surface 407 of drill bit 400 extends to outer surface 408.Double tapered closure slot 430 Increase size and can reduce the probability that chip is stayed in closure slot 430, and therefore improve the boring performance of drill bit 400.This Outward, double tapered closure slot 430 can provide effective flushing, also reduce the material at the inner surface 407 of drill bit 400 simultaneously Remove.Therefore, double tapered closure slot 430 can be by helping minimizing near the premature abrasion of the drill bit 400 of inner surface 407 Contribute to increasing the drill life of drill bit.

Fig. 8-Figure 10 illustrates that the turning of water channel 412,430 may include circular surface or inclined-plane further.Water channel 412,430 The circular surface at turning can help to reduce stress concentration, and therefore can help to increase the intensity of drill bit 400.

In addition to water channel, brill hat 404 may include the multiple grooves for pilot bore hole fluid, similar to herein in above phase For the groove described in drill bit 200.For example, some in the present invention are embodied as, and drill bit 400 may include from inner surface 407 court Multiple inside grooves 422 that exterior surface 408 radially extends.Multiple inside grooves 422 can help to drilling fluids along in drill bit 400 Surface 407 guides towards cutting face 409 from handle 402.As Figure 8-Figure 10, some in the present invention are embodied as, inside groove 422 can axially extend to recess 412 along inner surface 407 from handle 402.Therefore, inside groove 422 can help to guide drilling fluids To recess 412.

In addition, boring hat 404 to may include the full inside groove 422b intersecting with closure slot 430.As shown in Figure 10, full inside groove 422a Cutting face 409 can be extended to from handle 402.Some in the present invention are embodied as, and full inside groove 422b can be with one or more envelopes Close slit 430 to intersect, as shown in Figure 10.Similarly, drill bit 400 may include water jacket 424 and full water jacket 424a.Water jacket 424 can Extend to recess 412 from handle 402, and full water jacket 424a can from handle 402 extend to cutting face 409 simultaneously also with closure slot 430 Intersecting.

Except water channel 412,430 and groove 422, outside 424, drill bit 400 may also include closed fluid passages 440.Closing stream Body passage 440 can be enclosed in drill bit 400 between inner surface 407 and outer surface 408.Additionally, as shown in Figure 10, sealing fluid Passage 440 can extend to water channel 412,430 from handle 402 or extend to cutting face 409.Closed fluid passages 440 can therefore by Drilling fluids are directed to cutting face 409 and bore, without flowing through, the inner surface 407 being preced with 404.In view of this disclosure is it should manage Solution, when holing in chiltern, broken or segmentation stratum, closed fluid passages 440 can help ensure that drill core sample is not drilled Hole fluid goes out drill bit 400.

Some of the present invention are embodied as may include extra or optional feature, described spy for closed fluid passages 440 Levy and can help to prevent from washing drill core sample off.For example, in some are embodied as, drill bit 400 may include along in brill hat 404 The thin-walled on surface 407.Thin-walled enclosed flume 412,430 can bore, so that described water channel will not extend radially into, the inside being preced with 404. Thin-walled can help to reduce and flow to any fluid boring within hat 404, and hence helps to prevent chiltern or segmentation drill core Sample is washed off.Additionally, drill bit 400 may not include inside groove 422.In view of this disclosure is it will be appreciated that such concrete In enforcement, drilling fluids are flowable axially to flow to water channel 412 boring in closed fluid passages 440 in hat 404, and 430, and And it is then out water channel 412,430 to cutting face 409 or outer surface 408.

Figure 15-Figure 22 illustrates the various views of exemplary core sampling drill bit 700.Drill bit 700 has longitudinal axis 706. In illustrative aspects, drill bit 700 may include handle 702 and annular bit hat 704.It is contemplated that drill bit 700 can with respect to conventional drill bit Improved permeability is provided.It is also contemplated that arriving, as measured by with respect to conventional drill bit, drill bit 700 can provide bit cutting face Enhanced chip/smear removal and enhanced cooling.It is contemplated that, drill bit 700 can provide improvement with respect to conventional drill bit Wearability.

In one aspect, annular bit hat 704 can have the cutting face of adjacent exterior circumferential surface 708 and inner surface 707 709.It is contemplated that annular bit hat 704 and handle 702 can coordinate (such as being schemed around the inner space 705 of longitudinal axis 706 with limiting Shown in 16).It is also contemplated that arriving, inner space 705 is configurable to during using drill bit 700 receive water or other borings Fluid.In one aspect, water or other drilling fluids can supply inner space 705 at the desired pressure.

On the other hand, and reference picture 15- Figure 17, similar to drill bit 400 as described herein, annular bit hat 704 can Limit multiple fluid passages or hole 740, wherein at least one hole extends to inner space 705 from cutting face 709.Optionally, many Each hole 740 in individual hole can extend to inner space 705 from cutting face 709.In a further aspect, and as Figure 15-Figure 17 Shown, each hole 740 in multiple holes can be enclosed in annular bit hat 704 between inner surface 707 and outer surface 708.In behaviour In work it is envisioned that, multiple holes 740 are configurable to essentially directly draw water (or other drilling fluids) from inner space 705 Lead cutting face 709.It is also contemplated that arriving, directly cutting can be increased to cutting face 709 supply pressure (hydraulic) water (or other drilling fluids) Flow velocity on face, thus allow the more rapid convection current cooling removing chip and significantly increasing cutting face.It is also contemplated that arriving, many The contact area in cutting face 709 can be reduced in individual hole 740 with respect to conventional drill bit, thus improving the permeability of drill bit 700.To set Expect, multiple holes 740 can allow the spatial abnormal feature of water (or other drilling fluids) with respect to cutting face 709, thus improving drill bit 700 wearability.With it is contemplated that multiple hole 740 can provide in the distribution on cutting face 709 in water (or other drilling fluids) Motility.It is contemplated that the fluid that multiple holes 740 can correspond essentially to as described in herein in relation to other exemplary drill bit leads to Road, such as, but not limited to herein in relation to the fluid passage 440 described in drill bit 400.

In illustrative aspects, multiple holes 740 optionally substantially can be equally spaced around cutting face 709.Optionally, one A little aspects, as shown in Figure 21-Figure 22, multiple holes 740 randomly can be spaced apart with the central point 701 of drill bit 700.In its other party Face, multiple holes 740 optionally can pattern around cutting face 709.For example, in illustrative aspects, multiple holes 740 can be appointed Selection of land is essentially homogeneously spaced apart with the central point 701 of drill bit 700.In these areas, and with reference to Figure 17 it is envisioned that, can There is provided the hole 740 of at least two concentric row, the wherein hole in each corresponding row is basic with the central point 701 of drill bit 700 On be evenly spaced apart.Optionally, in other illustrative aspects, the hole of at least two concentric row may include interior concentric row The hole 740a and hole 740b of outer concentric row.In these areas it is envisioned that, each respective aperture 740b of outer concentric row can be relatively In interior concentric row corresponding aperture 740a with selected orientation positions.In other illustrative aspects it is envisioned that, multiple hole Ke Bao Include many device to holes, wherein every device to hole includes the endoporus 740a in interior concentric row hole and corresponding exit orifice 740b in outer concentric row hole.If Expect, each hole 740a, 740b can have respective central point 741a, 741b.It is also contemplated that arriving, exit orifice 740b of every device to hole Central point 741b can be with respect to the radian 744 of the central point 741a of the endoporus 740a through the central point 701 of drill bit and this device to hole Positioned with selected angle 745.In illustrative aspects, it is also contemplated that arriving, chosen angle 745 may correspond to mutually tackle through each The endoporus 740a in hole, the central point 741a of exit orifice 740b, the angle between the radian 744 of 741b and orientation line 746.

More generally say it is envisioned that, multiple holes 740 can provide in the configuration of any selection.It is also contemplated that arriving, can be distributed Multiple holes 740 are to optimize the wearing character of the drill bit 700 for application-specific.

It is contemplated that each hole 740 in multiple holes can be provided with selected shape.In illustrative aspects, multiple holes 740 Can have substantially cylindrical in shape (substantially circular cross-sectional profiles).It is envisaged however that, multiple holes 740 can have Any shape, includes, for example, but not limited to, substantially conical (taper) shape and (has substantially circular cross section wheel Wide), there is the shape of substantial rectangular cross-sectional profiles, there is the substantially shape of square cross facial contour, S-shaped shape etc..

In illustrative aspects, and with reference to Figure 15 and Figure 17, the outer surface 708 of annular bit hat 704 can limit towards longitudinally At least one passage 738 that axis 706 extends radially inward.In these areas, at least one passage optionally include multiple Passage.Optionally, in some respects, handle 702 can have outer surface, and the outer surface 708 of annular bit hat 704 can be with handle 702 Outer surface coordinate to limit at least one passage 738.Optionally, the outer surface of handle 702 can be with the outer surface of annular bit hat 704 708 cooperations are to limit each passage 738 of at least one passage.

In a further aspect, each passage 738 in multiple passages can have width.In these areas, each passage 738 Width can be from the outer surface 708 of annular bit hat 704 with moving radially inwardly to longitudinal axis 706 (and inner surface 707) Reduce.In illustrative aspects, multiple passages 738 are optionally circumferentially substantially first-class around the outer surface 708 of annular bit hat 704 Away from spaced apart.In other illustrative aspects, multiple passages 738 are optionally the size being substantially identical.It is contemplated, however, that Arrive, at least one of multiple passages passage 738 optionally has the sizes different from the size of at least one other passage. Optionally, at some exemplary aspects, multiple passages 738 may include more than first passage and more than second passage, wherein Each passage in more than first passage has first size, and more than second passage has second different from first size Size.As used herein, " size " of passage 738 typically refers to passage 2 dimensional region measured in the planes, this plane base Perpendicular to the longitudinal axis 706 of drill bit 700 in basis.

In illustrative aspects, and with reference to Figure 17, when annular bit hat 704 limits multiple passages 738 as disclosed herein With during many device to holes 740 it is envisioned that, at least one of multiple passages passage can near corresponding to hole positioning.It is also contemplated that arriving, Each passage 738 in multiple passages can have central point 739.In illustrative aspects, chosen angle 745 can be selected acute angle, And at least one of multiple passages passage 738 is optionally positioned to corresponding orientation line 746 substantial registration so that taking Pass through the central point 739 of passage to line.Optionally it is envisioned that, each passage 738 in multiple passages may be positioned to and accordingly takes To line 746 substantial registration so that orientation line passes through the central point 739 of passage.

Optionally, in other illustrative aspects, and reference picture 19- Figure 22 it is envisioned that, annular bit hat 704 interior table Face 707 can limit and be arranged essentially parallel at least one groove 710 that the longitudinal axis 706 of drill bit 700 extend.In these areas, extremely Each groove 710 in a few groove optionally corresponds to from outer surface 708 footpath boring the inner surface 707 of hat 704 towards brill hat To the circular groove extending.It is contemplated that at least one groove optionally includes multiple grooves 710.Optionally, in some respects, if Expect, the inner surface of handle 702 can be coordinated with the inner surface 707 boring hat 704 to limit at least one groove 710.In illustrative aspects, And as disclosed further herein it is envisioned that, each groove 710 is optionally positioned to the respective aperture 740 with annular bit hat 704 Or accordingly device to hole is in fluid communication.

In illustrative aspects, and reference picture 19- Figure 20 it is envisioned that, be limited to bore hat 704 inner surface 707 on every Individual groove 710 can have central point 711.In these areas, at least one groove 710 can be positioned so as to corresponding as disclosed Orientation line 746 substantial registration is so that orientation line passes through the central point 711 of groove.Optionally, when at least one groove includes multiple grooves When it is envisioned that, it is substantially right with respective orientation line 746 as disclosed that each groove 710 in multiple grooves can be positioned so that Standard is so that orientation line passes through the central point 711 of groove.

In a further aspect, annular bit hat 704 can limit single recess 712, and this recess is with respect to longitudinal axis 706 in ring Shape bores longitudinal extension in the cutting face 709 of hat and a part for circumferential exterior surface 708.In this aspect, recess 712 can be from inner surface 707 extend radially into outer surface 708.It is contemplated that recess 712 is configurable to allow rupture and the ejection of required drill core sample. In illustrative aspects, the drilling fluids that pressurize be can be positioned so that and connected so that grasping in boring with a part for the recess 712 being limited During work, the desired amount of drilling fluids can be delivered in recess.

Optionally, such as recess 112 disclosed herein, 212,312,412, recess 712 can be for axially and/or radially gradually Contracting.When recess 712 is axially tapered, longitudinal size at the outer surface 708 of annular bit hat 704 for the recess can be more than recessed Longitudinal size at the inner surface 707 of annular bit hat for the mouth.When recess 712 is tapered radially, recess can have variable Width, and the inner surface 707 that width at the outer surface 708 of annular bit hat 704 for the recess can be preced with annular bit more than recess The width at place.In illustrative aspects, recess 712 can be axially tapered and tapered radially.

In illustrative aspects, when drill bit 700 includes both single recess 712 and multiple hole 740 it is envisioned that, recess 712 Drill core can be allowed essentially freely to flow to, from cutting face 709, the external diameter 708 boring hat 704.It is also contemplated that arriving, non-homogeneous boring is preced with 704 can produce non-equilibrium movement, thus allowing the easily broken of drill core.

In illustrative aspects, and with reference to Figure 18, drill bit 700 also optionally includes the single recess of multiple embedded restriction 712 lower surface 742 of annular bit hat 704 and/or at least one of side surface 744,746 partly in wear member 760.It is contemplated that optionally but be not limited to, due to the rotation of drill bit in use, multiple wear members 760 can neighbouring as punching Hit wall (for example, rear wall) recess 740 side wall embed lower surface 742 partly in.At this aspect it is envisioned that, multiple Wear member 760 can the abutment of adjacent bottom surface and corresponding side wall and be embedded in the region of lower surface 742.Another Outer aspect, the multiple wear members 760 in lower surface 742 can be positioned with desired, predetermined array.At one In example, the array of multiple wear members 760 may include a series of row of wear members.At this aspect it is envisioned that, often row can Including the multiple wear members 760 substantially positioning along common axis.Optionally, common axis can be arranged essentially parallel to adjacent Side wall.It is therefore contemplated that arriving, the array of multiple wear members 760 may include the row of a series of wear member, where each row base Parallel to each other in basis and parallel with adjacent side wall.

In a further aspect, optionally but be not limited to, due to the rotation of drill bit 700 in use, multiple wear members 760 Can embed side wall as impingement wall (for example, rear wall) partly in.In this aspect it is envisioned that, multiple wear members 760 can be adjacent The abutment of nearly lower surface 742 and side wall and in the region of embedded side wall.In a further aspect, in lower surface 742 Multiple wear members 760 can be positioned with desired, predetermined array.In one example, the battle array of multiple wear members 760 Row may include a series of row of wear members.At this aspect it is envisioned that, often row may include and substantially positions along common axis Multiple wear members 760.Optionally, common axis can be arranged essentially parallel to adjacent lower surface.It is therefore contemplated that arriving, many The array of individual wear member 760 may include the row of a series of wear member, and where each row is substantially parallel to each other, and with adjacent Lower surface 742 parallel.In a further aspect, the array being positioned at the multiple wear members 760 on the wall of side can be with drill bit 700 Cutting face 709 be spaced apart required distance.

On the other hand, at least a portion of multiple wear members 760 can be from the respective lower surface that it is embedded 742 and/or side wall 744,746 extend upright and unafraidly.In one aspect, it is also contemplated that arriving, this array may include the wear-resisting of additional row Component 760, the wear member of this additional row becomes primary relationship to be encapsulated in drill bit 700 with the wear member with exposure row, The wear member of this exposure row is positioned in one of lower surface 742 and/or side surface 744,746 of drill bit.Pass through This mode, other wear member 760 can the normal wear according to drill bit 700 during operation and expose.

In one aspect, each wear member 760 can be slender member, and such as but not limited to, this slender member can have There is the rectangular shape including longitudinal axis.As shown in figure 18 it is envisioned that, slender member 760 can be oriented so that each The longitudinal axis of slender member are arranged essentially parallel to neighbouring lower surface 742 and/or side wall 744,746.Conditional not having In the case of it is envisioned that, each wear member 760 can comprise tungsten carbide, TSD (heat-staple diamond), PDC (polycrystalline diamond Composite), CBN (cubic boron nitride), signle crystal alumina, carborundum, wear-resistant ceramic material, diamond synthesis material, natural At least one in diamond and polycrystalline diamond abrasive compact.

In use it is envisioned that, drill bit 700 can achieve expectation under than the lower horizontal thrust needed for known drill bit Level of interpenetration.Due to the increase of annular bit 700 intensity and flushing it is envisioned that, compared with known drill bit, drill bit 700 Less functional product life-span worn and torn and there is increase, the functional product life-span that wherein drill bit 700 has can be shown More than known drill bit the functional product life-span up to about 5 times.It is also contemplated that arriving, the disclosed increase of annular bit 700 Intensity and flushing can allow the bigger depth using diamond insert in the fabrication process.It is contemplated that, disclosed annular bit 700 can produce higher fluid velocity at cutting face 709, thus provide faster rock remove and heat transfer pass and Limit the abrasion of the diamond in drill bit, it is typically due to the high temperature of rock and friction and weares and teares.

As it was previously stated, the handle 102,202,302,402,702 of the various boring bar tools of the present invention is configurable to drill bit It is fixed to upsilonstring components.For example, handle 102,202,302,402,702 may include American Petroleum Institute's (API) threaded joints or Other features are to contribute to being attached to upsilonstring components.Unrestricted by way of example, handle portion 102,202,302,402, 702 by steel, another kind of ferrous alloy or can show any other materials of acceptable physical characteristics and formed.

Some in the present invention are embodied as, and the brill hat 104,204,304,404,704 of the boring bar tool of the present invention can It is made up of one or more layers.For example, some according to the present invention are embodied as, and bore hat 104,204,304,404,704 and can wrap Include two layers.Specifically, bore hat 104,204,304,404,704 and may include the hypothalluses carrying out drilling operation, and by base Matter layer is connected to the backing layer of handle 102,202,302,402,702.In these are embodied as, hypothalluses can comprise to grind and grind Lose the grinding cutting medium of the material holed.

In some are embodied as, boring hat 104,204,304,404,704 can be by the base of hard particle materials (such as metal) Matter is formed.In view of this disclosure is it will be appreciated that hard particle materials may include dusty material, such as powdered-metal or conjunction Gold, and ceramic compound.Some according to the present invention are embodied as, and hard particle materials may include tungsten carbide.As used herein, Term " tungsten carbide " means to comprise any material of the chemical compound (combination of such as WC, W2C and WC and W2C) of tungsten and carbon Material composition.Therefore, tungsten carbide includes such as cast tungsten carbide, cemented tungsten carbide and coarse-grain tungsten.According to the present invention in addition or can That selects is embodied as, and hard particle materials may include carbide, tungsten, ferrum, cobalt and/or molybdenum and their carbide, boride, conjunction Gold, or any other suitable material.

As it was previously stated, bore hat 104,204,304,404,704 may also include be dispersed in multiple in whole hard particle materials Grinding cutting medium.Grinding cutting medium may include natural diamond, diamond synthesis, polycrystalline diamond or heat-staple Buddha's warrior attendant Stone product, aluminium oxide, carborundum, silicon nitride, tungsten carbide, cubic boron nitride, aluminium oxide, plus crystal seed or unseeded colloidal sol- One or more of gel alumina, or other suitable materials.

Can have any institute for the grinding cutting medium in one or more boring bar tools being embodied as of the present invention Need the combination of characteristic or characteristic.For example, grinding cutting medium can have any size, shape, granularity, quality, grit, concentration Deng.In certain embodiments, grinding cutting medium can be very little and substantially circular, just to be bored by core sampling Fineness is left on the materials of 100,200,300,400,700 cuttings.In other embodiments, Cutting Medium can larger to have Power ground is cut in the material holed or stratum.

Grinding cutting medium evenly or unevenly can disperse in whole boring in hat 104,204,304,404,704.Equally, Grinding cutting medium can be aligned in a specific way so that the borehole characteristic of medium be present in respect to bore hat 104,204,304, In 404,704 vantage point.Similarly, grinding cutting medium can be contained in brill hat 104,204 with various density as needed, For special-purpose in 304,404,704.For example, interval larger grinding cutting medium farther out is compared with being closely packed together Less grinding cutting medium can quickly cut material.Therefore, in view of this disclosure is it will be appreciated that grinding cutting The size of medium, density and shape can be according to the required cost of drill bit 100,200,300,400,700 and performance with various combinations There is provided.

For example, bore hat 104,204,304,404,704 to be manufactured into any required specification or give any desirable characteristics. By this way, bore hat 104,204,304,404,704 and can be customized and design to have for being holed to certain material Optkmal characteristics.For example, hard wearability substrate can be made into soft abrasiveness unconsolidated formation is holed, and soft ductility base Matter can be made into extremely hard non-abrasive consolidating stratum is holed.By this way, matrix solidity can match specifically Layer, thus allow hypothalluses to denude with controlled desired rate.

It should be appreciated that according to the present invention be embodied as have customization cutting tip boring bar tool can with substantially any The hole-drilling system of type is used together to carry out various drilling operations.For example, Figure 11 and corresponding text illustrate or describe a kind of this The hole-drilling system of sample, the boring bar tool of the present invention can be used together with described hole-drilling system.It will be appreciated, however, that institute in Figure 11 Show an example of the system that the boring bar tool being only the present invention with described hole-drilling system can be used therewith.

For example, Figure 11 illustrates the hole-drilling system 500 including drill bit head 510.Drill bit head 510 can be connected to mast 520, This mast is connected to rig 530 then.Drill bit head 510 is configurable to have the one or more tubulose structures being connected to thereon Part 540.Tubular element may include but be not limited to drilling rod, housing and down-hole hammer.For the ease of reference, tubular element 540 will be at this It is described below as upsilonstring components in literary composition.Upsilonstring components 540 can then be connected to other upsilonstring components 540 with formed drill string or Tool tubular column 550.In turn, drill string 550 can be connected to the boring bar tool 560 including axially tapered water channel, such as above Described core sampling drill bit 100,200,300,400,700.As previously mentioned, boring bar tool 560 be configurable to Material 570 hole to be drilled or stratum engage.

In at least one example, the drill bit head 510 being shown in Figure 11 is configurable to rotation during boring procedure Drill string 550.Specifically, drill bit head 510 can change the speed that drill bit head 510 is rotated with it.For example, the rotation of drill bit head The moment of torsion of rotational speed rate and/or the drill bit head 510 being sent to drill string 550 can select on demand according to boring procedure.

Additionally, hole-drilling system 500 is configurable to for approximately longitudinally downward power to be applied to drill string 550 to force drillman Tool 560 enters in stratum 570 during drilling operation.For example, hole-drilling system 500 may include chain drive component, and this chain drives Assembly is configured to sliding part moves with respect to mast 520 so that power approximately longitudinally is applied to boring bar tool drill bit 560, as mentioned above.

As used herein, term " longitudinal " means the length along drill string 550.In addition, as used herein, term " on Portion ", " top " and " in ... top ", " bottom " and " in ... lower section " refer to the lengthwise position on drill string 550.Term " on Portion ", " top " and " in ... top " refer to the position closer to drill bit head 510, and " bottom " and " in ... lower section " refers to more Position near boring bar tool 560.

Therefore, in view of this disclosure it will be appreciated that the boring bar tool of the present invention can be used for any in this area Purpose.For example, the impregnated core sampling drill bit 100,200,300,400,700 having diamond could attach to the end of drill string 550, This end is subsequently connected to drilling machine or rig 530.Because drill string 550 and therefore drill bit 560 rotate and pushed away by drilling machine 530 Dynamic, the material that drill bit 560 just can grind off in drilled subsurface formations 570.Can be by the drill core being drilled sample from drill string 550 Take out.Due to ablation, the cutting tip of drill bit 560 can over time and denude.This process sustainable until drill bit 560 Cutting tip be consumed, and drill string 550 and then drill bit 560 can be replaced by acting boring.

The method being embodied as also including being formed the boring bar tool with axially tapered water channel of the present invention.Describe below Form at least one method of the boring bar tool with axially tapered water channel.Certainly, as initial question, this area general Logical it will be recognized that the method that explains in detail can be modified to install using one or more parts of the present invention various Configuration.

As initial problem, as used herein, term " infiltration " is related to bond vitrified agent material and makes the viscous of melting Knot agent is penetrated in the space of substrate or hole and fills described space or hole.After the cooling period, binding agent is curable, thus by base The granule of matter is bonded together.As used herein, term " sintering " is meant to remove and is combined by coalescence and combine at adjacent At least a portion (it can be along with contraction) in the hole between granule between grain.

One or more of method of the present invention may include and forms axially tapered water in boring bar tool using plug Road.For example, Figure 12-Figure 14 illustrates plug 600 (such as drill bit 200,700 recess that can be used for forming axially tapered water channel 212,712 or the slit 430 of drill bit 400) various views.As shown in Figure 12-Figure 14, plug 600 may include corresponding to axially gradually The surface on the surface of water channel of contracting.For example, plug 600 may include top surface 602, lower surface 604, the first side surface 608 and Second side surface 606.In addition, plug 600 may include the inclined-plane 610 on the surface 602,604,606,608 of connection plug 600.

As shown in figure 13, the top surface 602 of plug 600 can have taper so that the first end of plug 600 can have first Longitudinal size 612, and fill in 600 the second end and can have the second longitudinal direction size 614 more than first longitudinal direction size 612.Cause This, following article is explained in greater detail, and the taper of top surface 602 can help to form the axial taper of water channel.

Similarly, Figure 14 illustrates that the second side surface 606 can have taper so that the first end of plug 600 can have the One width 616, and fill in 600 the second end and can have the second width 618 more than the first width 616.Therefore, following article is more Explained in detail, the taper of the second side surface 606 can help to form the radial direction taper of water channel.It should be appreciated that the shape of plug 600 Can be changed according to the required form of the water channel of stand-by plug 600 formation and configuration with configuration.

Some in the present invention are embodied as, and plug 600 can by graphite, carbon or the other materials with desired material properties Formed.For example, not significantly melting or the material rotting can be formed by plug 600 by infiltration or during sintering.Following article is more detailed Ground is explained, by using the plug 600 being formed by the material of not significantly melting, fills in 600 and can be relatively easy to the boring bar tool from infiltration Remove.

A kind of method of the present invention may include the substrate providing hard particle materials and grinding cutting medium, all as described above Hard particle materials and grinding cutting dielectric material.Some in the present invention are embodied as, and hard particle materials may include powder Mixture.Method may also refer to substrate compacting or is otherwise shaped as desired form.For example, method can relate to substrate Be formed as the shape of annular bit hat.Then method can relate to multiple plugs are placed in substrate.For example, method can relate to bottom Surface 602 is placed in the surface corresponding to cutting face of annular bit hat to form recess 112,212,312,412,712.Remove Outside this or alternatively, the surface certain distance corresponding to cutting face that method can relate to away from annular bit hat will be filled in To form closure slot 430 in 600 main bodys being placed into annular bit hat.

Then method may include and uses binding agent permeable matrices.Binding agent may include copper, zinc, silver, molybdenum, nickel, cobalt, or they Mixture and alloy.Binding agent can cool down, thus being bonded to substrate (hard particle materials and grinding cutting medium), thus by substrate It is combined together.Binding agent will not may significantly be bonded to plug 600, thus allow to remove plug 600 with expose axially tapered or Double tapered water channels.

Another kind of method of the present invention generally include offer substrate and with substrate filling have be placed on therein plug 600 Mould.Mould can be of a material that, binder material may will not significantly be bonded on this material, such as graphite Or carbon.Then method can relate to make substrate densification by gravity and/or vibration.Then method can relate to comprising previous materials One or more of binding agent permeable matrices.Binding agent can cool down, thus being bonded to substrate, (hard particle materials and grinding are cut Cut medium), thus substrate is combined together.Binding agent will not may significantly be bonded to plug 600 or mould, thus allowing to move Except plug 600 is to expose axially tapered or double tapered water channels.

Before the infiltration of substrate, afterwards or in unison, one or more method of the present invention may include burns substrate Tie required density.Because sintering is related to make porosity densification and the removal in structure, so the structure being sintered can be Shrink during sintering process.Structure can experience between the linear contraction between 1% and 40% in during sintering.Therefore, work as design Process (model, mould etc.) or machine during the feature in not fully sintered structure it is desirable to studying and considering dimensional contraction.

In illustrative aspects, the core sampling drill bit with longitudinal axis may include handle and annular bit hat.In the party Face, annular bit is preced with the longitudinal axis around drill bit and is had cutting face, inner surface and outer surface.In one aspect, annular bit Hat and handle cooperation are to limit the inner space being configured to receiving drill core sample around longitudinal axis.In this aspect, annular bit Hat can limit single recess, and this recess extends to outer surface and with respect to longitudinal axis from cutting face axial direction from inner surface radial direction Extend at least a portion of annular bit hat.

In a further aspect, annular bit hat can limit multiple holes further.Each hole in multiple holes can in inner surface and It is enclosed between outer surface in annular bit hat, and at least one of multiple hole Kong Kecong cutting face extends to inner space. In a further aspect, multiple holes substantially equidistantly can be distributed around cutting face.Optionally, the central point of multiple Kong Keyu drill bits Randomly it is spaced apart.On the other hand, multiple holes optionally can pattern around cutting face.

Optionally, multiple holes may include the hole of at least two concentric row, wherein the hole in the row of each corresponding concentric with The central point of drill bit is substantially equally spaced.In this aspect, the hole of at least two concentric row may include interior concentric row Hole and outer concentric row hole, each respective aperture of its concentric row in China and foreign countries with respect to interior concentric row corresponding aperture with selected Orientation positions.

Optionally, multiple holes may also include many device to holes, and every device to hole includes the interior concentric endoporus in row hole and outer concentric row Corresponding exit orifice, each hole in multiple holes has a central point, and the central point of the exit orifice of wherein every device to hole is with respect to through drill bit Central point and this device to hole the central point of endoporus radian with chosen angle position.In this aspect, the outer surface of annular bit hat The multiple passages extending internally radially toward the longitudinal axis can be limited.In this aspect, at least one of multiple passages passage can Near the hole positioning to reply.On the other hand, each passage in multiple passages can have central point, and wherein chosen angle is Selected acute angle, and the central point of at least one of plurality of passage passage be oriented to through in corresponding device to hole The orientation line substantial registration of the central point of hole and exit orifice.

In a further aspect, recess can be axially tapered, the longitudinal ruler of the outer surface being preced with annular bit by this recess The very little longitudinal size more than recess at the inner surface that annular bit is preced with.Optionally, recess can be tapered radially, is had by this recess There is variable-width, wherein recess is more than the width at the inner surface of annular bit hat in the width of the outer surface that annular bit is preced with. On the other hand, recess can be tapered radially, has variable-width, the outer surface that wherein recess is preced with annular bit by this recess The width at place is more than the width at the inner surface of annular bit hat.

At another optional aspect, the central point of each passage in multiple passages can be positioned so that with through corresponding device to hole Endoporus and exit orifice central point orientation line substantial registration.In this aspect, the inner surface of annular bit hat can limit to external diameter At least one groove to the longitudinal axis extending outwardly away from drill bit.Here, each groove at least one groove can have central point, should Central point is oriented to and respective orientation line substantial registration.In addition, at least one groove may include multiple grooves.

In one aspect, the outer surface of annular bit hat can limit at least one extending internally radially toward the longitudinal axis and lead to Road.In one aspect, at least one passage may include multiple passages.

In another optional aspect, handle can have outer surface.In this aspect, the outer surface of annular bit hat can be outer with handle Surface engagement is to limit each passage at least one passage.Each passage in this aspect, multiple passages has width, And the outer surface that the width of wherein each passage is preced with from annular bit reduces with moving radially inwardly to longitudinal axis.Another On the one hand, multiple passages circumferentially substantially can be equally spaced around the outer surface of annular bit hat.In yet another aspect, multiple Passage can be the size being substantially identical.

Some according to the present invention are embodied as, and the time of process of osmosis and/or temperature can increase to allow binding agent to fill out Fill the larger amt of substrate and more substantial hole.This can reduce the contraction of during sintering, increase the strong of gained boring bar tool simultaneously Degree.

The present invention therefore can be effected without departing from its spirit or essential characteristics in other specific forms.Described enforcement Example is considered in all respects only as exemplary and nonrestrictive.For example, some in the present invention are embodied as, axle Can be formed by removing material from brill hat to tapered water channel, rather than using plug.Therefore, in some are embodied as, Axially tapered water channel or can cut into water channel processing by using water spray, laser, spark machined (EDM) or other technologies Bore hat and formed.Therefore, the scope of the present invention is by appended claims rather than by explanation instruction above.Fall into power The equivalent implication of sharp claim and within the scope of all changes all cover within the scope of the present invention.

Claims

1. a kind of core sampling drill bit with longitudinal axis, including：

Handle；

Around the annular bit hat of the described longitudinal axis of described drill bit, described annular bit hat has cutting face, inner surface and appearance Face, described annular bit hat and the cooperation of described handle are to limit the inside being configured to receiving drill core sample around described longitudinal axis Space.

Wherein said annular bit hat limits single recess, and wherein said recess extends to described appearance from described inner surface radial direction Face, and wherein said recess axially extends to described annular bit hat at least with respect to described longitudinal axis from described cutting face In a part, and

Wherein said annular bit hat limits multiple holes further, and each hole in wherein said multiple holes is in described inner surface and institute State and be enclosed between outer surface in described annular bit hat, and at least one of wherein said multiple hole hole is from described cutting face Extend to described inner space.

2. core sampling drill bit according to claim 1, wherein said recess is axially tapered, and thus described recess exists The longitudinal size of the described outer surface of described annular bit hat is more than described recess at the described inner surface that described annular bit is preced with Longitudinal size.

3. core sampling drill bit according to claim 1, wherein said recess is tapered radially, thus described recess tool There is variable-width, the width of the described outer surface that wherein said recess is preced with described annular bit is more than in described annular bit hat Width at described inner surface.

4. core sampling drill bit according to claim 2, wherein said recess is tapered radially, thus described recess tool There is variable-width, the width of the described outer surface that wherein said recess is preced with described annular bit is more than in described annular bit hat Width at described inner surface.

5. core sampling drill bit according to claim 1, the described outer surface of wherein said annular bit hat limits towards institute State at least one passage that longitudinal axis extend radially inwardly.

6. core sampling drill bit according to claim 5, wherein said handle has outer surface, and wherein said annular bit The described outer surface of hat is coordinated with the described outer surface of described handle to limit each passage at least one passage described.

7. core sampling drill bit according to claim 5, at least one passage wherein said includes multiple passages.

8. core sampling drill bit according to claim 7, each passage in wherein said multiple passages has width, and And the described outer surface that the described width of wherein each passage is preced with from described annular bit is with to described longitudinal axis radially-inwardly Move and reduce.

9. core sampling drill bit according to claim 7, described in wherein said multiple passages are preced with around described annular bit Outer surface is circumferentially substantially equally spaced.

10. core sampling drill bit according to claim 7, wherein said multiple passages are the size being substantially identical.

11. core sampling drill bits according to claim 1, wherein said multiple holes are substantially equidistant around described cutting face Ground distribution.

The central point of 12. core sampling drill bits according to claim 1, wherein said multiple holes and described drill bit is randomly It is spaced apart.

13. core sampling drill bits according to claim 1, multiple holes optionally pattern around described cutting face.

14. core sampling drill bits according to claim 13, wherein said multiple holes include at least two concentric row Hole, and the described hole wherein in the row of each corresponding concentric is substantially equally spaced with the central point of described drill bit.

15. core sampling drill bits according to claim 14, the hole of wherein said at least two concentric row include interior with The hole of the row of the heart and the hole of outer concentric row, each respective aperture of wherein said outer concentric row is with respect to described interior concentric row Corresponding aperture with selected orientation positions.

16. core sampling drill bits according to claim 15, wherein said multiple holes include many device to holes, and every device to hole includes institute State the interior concentric endoporus in row hole and the corresponding exit orifice of described outer concentric row, each hole in the plurality of hole has center Point, the described central point of the described exit orifice of wherein every device to hole is with respect to through described in the central point of described drill bit and described device to hole The radian of the described central point of endoporus is positioned with chosen angle.

17. core sampling drill bits according to claim 16, the described outer surface of wherein said annular bit hat limits direction Multiple passages that described longitudinal axis extend radially inwardly.

18. core sampling drill bits according to claim 17, at least one of wherein said multiple passages passage is close Hole positioning to reply.

19. core sampling drill bits according to claim 17, each passage in wherein said multiple passages has center Point, wherein said chosen angle is selected acute angle, and at least one of wherein said multiple passage passage described in Heart point is oriented to the orientation line substantial registration with the described central point through the described endoporus of corresponding device to hole and described exit orifice.

20. core sampling drill bits according to claim 19, each passage in wherein said multiple passages described in Heart point is oriented to the orientation line substantial registration with the described central point through the described endoporus of corresponding device to hole and described exit orifice.

21. core sampling drill bits according to claim 20, the described inner surface of wherein said annular bit hat outwards limits Radially extend at least one groove of the described longitudinal axis away from described drill bit, each groove tool at least one groove wherein said There is central point, and the described central point of each groove of at least one groove wherein said is oriented to respective orientation line substantially Be aligned.

22. core sampling drill bits according to claim 21, at least one groove wherein said includes multiple grooves.