CN203097720U - Concentric slide block simultaneous casing drilling tool, central drill bit and centralizer - Google Patents
Concentric slide block simultaneous casing drilling tool, central drill bit and centralizer Download PDFInfo
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- CN203097720U CN203097720U CN 201220549095 CN201220549095U CN203097720U CN 203097720 U CN203097720 U CN 203097720U CN 201220549095 CN201220549095 CN 201220549095 CN 201220549095 U CN201220549095 U CN 201220549095U CN 203097720 U CN203097720 U CN 203097720U
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Abstract
The utility model discloses a concentric slide block simultaneous casing drilling tool, a central drill bit and a centralizer. The drilling tool consists of the centralizer, the trapezoidal opening central drill bit and semicircular hole dilating drilling sheets, wherein the trapezoidal opening central drill bit is connected with a hole opposite to the centralizer in a matching way through a triangular or hexagonal spline shaft to transmit torque; the trapezoidal opening central drill bit is connected and positioned through self positioning grooves, positioning holes, solid cylindrical pins and empty expansion pins; three semicircular hole dilating drilling sheets are positioned in a T-shaped chute and an R-shaped arc chute between which the included angle is 120 degrees; the axial line of the trapezoidal opening central drill bit serves as the center; the torque is transmitted through the T-shaped chute and the R-shaped arc chute; when the drilling tool moves downwards, the hole dilating drilling sheets slide backwards along the T-shaped chute and the R-shaped arc chute to the end surface of the centralizer under the resistance of rocks to be positioned, and a hole dilating simultaneous casing is formed; when the drilling tool is pulled upwards, the hole dilating drilling sheets slide downwards and are shrunk under the resistance of a pipe shoe to be withdrawn. The opening drill bit of the drilling tool is small in front area and centralized in stress, a harder or bigger rock can be preferentially crushed grade by grade by the drilling tool, and the crushing speed is relatively high.
Description
Technical field
The utility model relates to mine blasting, water power infrastructure, slope of highway underpin, railway prospecting, and geological disaster such as prevents at dark, the shallow bore hole broken location construction of correlation engineering; Be applicable to various rock-core borers, jumbolter, be used for geological mapping and get fields such as core, deep foundation pit support, high slope anchoring, Tunnel Landslide pipe shed support, boulder bed high-pressure rotary-spray, the following with one heart of a kind of down-the-hole hammer usefulness that relates to required usefulness managed concentric slide block casing drilling tool.
Background technology
The down-the-hole casing drilling tool of Chu Shouing in the market, major part all is the casing drilling tool of eccentric center principle, according to facts have proved for many years, all there are obvious defects in existing eccentric casing drilling tool or other concentric drilling tool, for example in use, torsional forces is big, boring circle, easily bit freezing, big with the pipe resistance, the eccentric swing amount is big, drilling tool discontinuity, intensity difference, must reverse when pulling out back, and the technological deficiency of accidents such as breaking of rod bar and sleeve pipe takes place easily.
The utility model content
Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of simple in structure, easy and simple to handle, easy-to-use concentric slide block casing drilling tool and center bit, guider adopt concentric slide block casing drilling tool and center bit, guider, can obviously strengthen crushing effect, and transmission is ingenious, and torsional forces is little, reliable in structure, resistance is little, and broken stone is even; Torsional forces is very little in drilling process simultaneously, does not have swing, and drilling rod is concentric, becomes hole circle.
The technical solution adopted in the utility model is as follows:
Center bit of the present utility model, comprise drill body and reamer sheet, described drill body is along on its central axis being the front portion, middle part and afterbody, the drill body front portion is arrow-shaped, taper or round boss structure, the diameter at drill body middle part is greater than the diameter of front portion, offer at least two skewed slots on the outer peripheral face at drill body front portion to middle part, the initiating terminal of this skewed slot is the drill body front portion, and at the drill body middle part is groove, the reamer sheet is positioned at this skewed slot and its coupling, the reamer sheet can be slided in skewed slot, all be inlaid with carbide alloy on the external surface of drill body front portion and reamer sheet, the afterbody of drill body is non-circular cylinder.
Owing to adopted said structure, center bit comprises drill body, wherein drill body is a column construction, and be symmetrically distributed with central axis, on the direction of central axis, be divided into the front portion, middle part and afterbody, and it is anterior, form integrative-structure between middle part and the afterbody, wherein the drill body front portion is arrow-shaped, taper or round boss structure, thereby be convenient to drill body in use, center bit front end area is little, stressed concentrating, meeting the classification of can going ahead of the rest of harder or bigger rock smashes, the diameter at drill body middle part is greater than the diameter of front portion, make the drill body middle part bigger than anterior, feasible middle part can support front, guarantee that it is stressed, on the outer peripheral face at drill body front portion to middle part, offer at least two skewed slots, this skewed slot can be two, three or four or more a plurality of skewed slots, the initiating terminal of this skewed slot is the drill body front portion, and in the middle part of drill body, be groove, make the groove of this skewed slot for the tail end at middle part from the initiating terminal of drill body front portion to drill body, because the drill body front portion is arrow-shaped, taper or round boss structure, therefore this groove is the skewed slot of incline structure, the reamer sheet is set in this skewed slot, this reamer sheet can mate with skewed slot, and can slide with respect to skewed slot, makes the reamer sheet to slide to the drill body front portion from the drill body middle part.When this drilling tool moves down, the reamer sheet is subjected to the rock resistance skewed slot end that rearward slides, thereby can form borehole-enlarging drilling tool and carry out reaming, when needs are upwards packed up drilling tool, upwards reel center bit, the reamer sheet is subjected to the shoe resistance to slide down to the skewed slot initiating terminal, thereby make drill bit dwindle withdrawal, need not counter-rotating can directly regain, it is easy to operate quick, simultaneously on the external surface of drill body front portion and reamer sheet, all be inlaid with carbide alloy, thereby hole and reaming, the crushing effect that has guaranteed center bit is good, is convenient to boring, and the afterbody of drill body is non-circular cylinder, adopt non-circular cylinder can make this drill bit can and guider between cooperatively interact, make that the location was accurate when drill body was installed in the guider, and the moment of torsion on the drill bit can be passed on the guider, be convenient to the transmission of moment of torsion.Center bit of the present utility model, simple in structure, easy and simple to handle, easy-to-use, can obviously strengthen crushing effect, and transmission is ingenious, torsional forces is little, reliable in structure, resistance is little, and broken stone is even.
Center bit of the present utility model offers three skewed slots on the outer peripheral face at drill body front portion to middle part, and three skewed slots are with respect on the central axis outer peripheral face that 120 ° are distributed in drill body at interval, and coupling has the reamer sheet in arbitrary skewed slot.
Owing to adopted said structure, skewed slot is three, and be distributed on the outer peripheral face of drill body, and three skewed slots are with respect to 120 ° at interval of central axiss, coupling has the reamer sheet in wherein arbitrary skewed slot, make that three reamer sheets are that the mutual angle in center is 120 degree with the axis of center bit, cooperate with the skewed slot of center bit and by skewed slot location transfer torque, and on each reamer sheet stressed evenly, in use, three reamer sheets slide to the tail end of skewed slot, are convenient to form the one-level boss thereby can form a similar full circle, thereby can carry out reaming at the end of drill bit, when meeting harder or bigger rock, the leading portion of drill bit carries out classification earlier and smashes, and the last hole wall that will expand is thinner, the afterbody boss that the reamer sheet forms, it is hit less, and torsional forces is very little in drilling process, does not have swing, drilling rod is concentric, becomes hole circle.
Center bit of the present utility model is provided with rectangular channel, dovetail groove or dovetail groove on the two side of described skewed slot, making skewed slot is the gathering sill of T shape structure.
Owing to adopted said structure, the groove of various ways structures such as rectangular channel, dovetail groove or dovetail groove is set on the two side of skewed slot, make the tangent plane of skewed slot form the gathering sill of T shape structure, the reamer sheet can slide in this gathering sill, slide to tail end from the initiating terminal of skewed slot, its slippage is convenient and swift, operates very easy.
Center bit of the present utility model, the afterbody of described drill body is triangle cylinder, semicircle cylinder, elliptic cylindrical, quadrangle cylinder, pentagon cylinder, hexagon cylinder, polygon or special-shaped cylinder, and the afterbody of drill body is provided with the pin breach.
Owing to adopted said structure, the afterbody of drill body can adopt triangle cylinder, semicircle cylinder, elliptic cylindrical, the quadrangle cylinder, the pentagon cylinder, the hexagon cylinder, multiple form of structure such as polygon or special-shaped cylinder, thereby be convenient to the location between drill body and the guider accurate, and moment of torsion on the drill body and impact can be passed to guider, the afterbody of drill body is provided with the pin breach simultaneously, be convenient to drill body and be connected location with the filled circles pin with hollow expansion pin with locating hole by himself pin breach, simple in structure, fiting effect is good.But avoid adopting circular cylinder because the afterbody of the drill body of circular cylinder in being inserted into guider after, not only be inconvenient to locate but also be not easy to transfer torque.
Center bit of the present utility model, described drill body front portion is the round boss structure, make the drill body front portion present the multistage boss of notch cuttype, between the boss at different levels with inclined-plane tapering transition reducing, the straight trough that is communicated with skewed slot also is set in the drill body front portion, the initiating terminal of straight trough is positioned at drill body, on the sidewall of the boss foremost of drill body front portion, is provided with the anterior ash pit of the drill bit that links to each other with the straight trough initiating terminal; The reamer sheet can slide in the straight trough in skewed slot, and the width of drill body afterbody is less than the middle part diameter.
Owing to adopted said structure, this drill body front portion is the round boss structure, make the drill body front portion present the multistage boss of notch cuttype, smash when meeting the classification of can going ahead of the rest of harder or bigger rock, minimizing is to drill body and reamer sheet impact, thereby guarantee its life-span, and between the boss at different levels with inclined-plane tapering transition reducing, from making the drill body front portion be protruding top, and it is big that diameter progressively becomes, tapering transition in inclined-plane between the boss at different levels, the drill body front portion also is provided with the straight trough that is communicated with skewed slot, and the initiating terminal of straight trough is positioned at the drill body front portion, therefore straight trough is connected with skewed slot, make its tail end of initiating terminal in the middle part of drill body from straight trough, the reamer sheet can slide in the straight trough in skewed slot, thereby is convenient to the folding and unfolding with the reamer sheet, when drilling tool moves down, the reamer sheet is rearward slided by the rock resistance and forms reaming with pipe, and the reamer sheet was subjected to the shoe resistance to dwindle withdrawal to lower slider when drilling tool upwards reeled, and need not counter-rotating can directly regain.The sidewall of the boss foremost of drill body front portion is provided with the anterior ash pit of drill bit, and the anterior ash pit of this drill bit links to each other with the straight trough initiating terminal, is beneficial to deslagging; The width of drill body afterbody is less than the middle part diameter, thereby is convenient to control cooperating between drill body and the guider, guarantees the safe and reliable of way-type drilling unit.
Center bit of the present utility model, the inside of described drill body is provided with center roof vent, on the outer peripheral face at drill body middle part, be provided with drill bit middle part ash pit, be provided with the drill bit middle part air vent that is communicated with center roof vent in the ash pit of described drill bit middle part, be provided with the drill bit straight trough air vent that is communicated with center roof vent in the described straight trough.
Owing to adopted said structure, drill bit middle part ash pit is convenient to the deslagging of drill bit, and being drilled with steam vent with guider master dreg discharging tunnel equidirectional in the ash pit of center bit middle part, discharge directions is consistent with the direction of slagging tap, and is not subjected to drilling tool pressure to meet soft mud dirt and can be convenient to deslagging by plug-hole.
Center bit of the present utility model, described reamer sheet comprises that top combines with the bottom and forms the brill sheet body of T shape structure, described brill sheet upper part of body semicircular in shape structure, bore the brill sheet arc hypotenuse of circular arc limit for tilting of sheet body, this place, angle, two ends of boring the sheet body is for boring sheet side convex body, bore sheet body bottom and be positioned at the middle part, non-circular arc limit of boring the sheet body, bore sheet side convex body and be the brill sheet side intrados of arcuate structure between the sheet body bottom to boring, the two side of described brill sheet body bottom is provided with the projection body, bore the sheet body and match with gathering sill, the reamer sheet can be slided in gathering sill with the combination of projection body.
Owing to adopted said structure, the reamer sheet can be divided into the top and the bottom of one, the brill sheet body of its two formation T shape structure that combines, bore sheet upper part of body semicircular in shape structure, make the amalgamation of a plurality of reamer sheet together, can form similar circle, thereby can form last one deck boss, thereby rock is smashed by hierarchical layered, last one deck is the reamer sheet, the impact minimum that it is subjected to, and reaming is effective, thereby increase its application life, bore the brill sheet arc hypotenuse of circular arc limit for tilting of sheet body, make that three reamer sheets spread apart after, external surface can form similar round structure in the middle part of its circular arc limit and the drill body, thereby form the reaming boss of last one deck, be convenient to carry out reaming.This place, angle, two ends of boring the sheet body is for boring sheet side convex body, bore sheet body bottom and be positioned at the middle part, non-circular arc limit of boring the sheet body, bore sheet side convex body and be the brill sheet side intrados of arcuate structure between the sheet body bottom to boring, the two side of described brill sheet body bottom is provided with the projection body, bore the sheet body and match with gathering sill, the reamer sheet can be slided in gathering sill with the combination of projection body.The projection body is convenient to bore the sheet body on the one hand and is slided in gathering sill, in addition can transfer torque, thereby guarantee that the moment of torsion that bears on the reamer sheet is less, being convenient to the reamer sheet simultaneously moves with respect to drill body, cooperatively interact between three reamer sheets, when drilling tool moved down, the reamer sheet was subjected to the rock resistance formation borehole-enlarging drilling tool that rearward slides, the reamer sheet was subjected to the shoe resistance to dwindle withdrawal to lower slider when drilling tool upwards reeled, and need not counter-rotating can directly regain.
Center bit of the present utility model on the outer peripheral face at the drill body middle part of skewed slot both sides, is provided with curve slope and arcuate furrow; Described curve slope can be fitted mutually with brill sheet side intrados, and described arcuate furrow can be fitted with brill sheet side convex body.
Owing to adopted said structure, described curve slope can be fitted mutually with brill sheet side intrados, described arcuate furrow can be fitted with boring sheet side convex body, makes the outer peripheral face at reamer sheet and drill body middle part fit, and the semicircle reamer sheet when making center bit cylindrical and reaming is arc transition, there is not obvious broken line, significantly reduce rotary resistance, torsional forces is very little in drilling process, does not have swing, drilling rod is concentric, becomes hole circle.
The guider that mates with center bit of the present utility model, comprise the guider body, the outer peripheral face of described guider body is provided with the guider ash pit, the two ends of guider body are provided with the guider center roof vent along the center, one end of guider body is provided with the non-circular drill bit tail end installing hole that the afterbody with drill body is complementary, the periphery of described guider body is provided with pin-and-hole and the guider air vent that is communicated with the guider center roof vent, described pin-and-hole is the through hole that runs through guider body sidewall, when center drill bit and guider assembling, this through hole can align with the pin breach.
Owing to adopted said structure, this guider and center bit mate mutually, wherein the outer peripheral face of guider body is provided with the guider ash pit of being convenient to deslagging, and the two ends at the guider body are provided with the guider center roof vent along the center, be convenient to be communicated with central through hole on the center bit, and by the enterprising gas that works of guider, one end of guider is provided with the non-circular drill bit tail end installing hole that the afterbody with drill body is complementary, this drill bit tail end installing hole can be for tri-angle-holed, semi-circular hole, slotted eye, quadrilateral hole, the pentagon hole, hexagonal hole, multiple hole such as polygonal hole or irregularly-shaped hole, but must be and the afterbody of the drill body identical non-circular hole that is complementary, the afterbody that this drill bit tail end installing hole is mainly used in drill body cooperatively interacts, thereby drill body is positioned, and can transfer torque, pin-and-hole is the through hole that runs through guider body sidewall, when center drill bit and guider assembling, this through hole can align with the pin breach, thereby can insert pin positions fixing, guarantee to be connected firmly between drill bit and the guider, what guarantee to use is safe and reliable.
The concentric slide block casing drilling tool that employing center bit of the present utility model and guider are combined to form, described reamer sheet is positioned at the skewed slot of drill body, the afterbody cooperation of described drill body is installed in the drill bit tail end installing hole, the guider center roof vent is communicated with center roof vent, drill bit middle part ash pit is communicated with the guider ash pit, described pin breach aligns with pin-and-hole, and by in the solid pin insertion pin-and-hole guider and center bit being fixed, the expansion pin that described solid pin is inserted in the pin-and-hole is spacing.
Owing to adopted said structure, the reamer sheet is that easy on and off slides, when spitting, impact cutting then need not the gap of rebounding, the halfpace position of guider is shorter than conventional drilling tool to the distance of reamer sheet, reaming break-up point and shoe distance are near, and dreg discharging tunnel is short, and slag stone falls after rise few, deslagging speed is fast, and the shoe resistance is little, drilling depth is fast; In whole drilling process, can reduce tube drawing power, easily reclaim, and be difficult for taking place disconnected shoe, with accidents such as pipe, drill bit, drilling rods.The end face that guider cooperates with center bit, the reducing end face fits and forms the back retainer of semicircle reamer sheet below the middle part of this end face and center bit under confined state, as the impact power transmission point of reamer sheet, the initiating terminal of center bit straight trough is the addressee stop position of semicircle reamer sheet.Employing center bit of the present utility model and the concentric slide block casing drilling tool that guider is combined to form can obviously strengthen crushing effect, and transmission are ingenious, and torsional forces is little, reliable in structure, and resistance is little, and broken stone is even; Torsional forces is very little in drilling process simultaneously, does not have swing, and drilling rod is concentric, becomes hole circle.
In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:
1, center bit of the present utility model, center bit front end area is little, and stressed concentrate met the classification of can going ahead of the rest of harder or bigger rock and smashed;
2, center bit of the present utility model, three semicircle reamer sheets are that the mutual angle in center is 120 degree with the axis of center bit, cooperate with the T type skewed slot of center bit and by T type skewed slot location transfer torque, semicircle reamer sheet when center bit cylindrical and reaming is arc transition, does not have obvious broken line, significantly reduces rotary resistance, torsional forces is very little in drilling process, do not have swing, drilling rod is concentric, becomes hole circle;
3, guider of the present utility model, the non-cylinder slotted eye of guider are connected with the non-cylinder of arrow-shaped center bit and cooperate transfer torque; Center bit, guider are connected location with the filled circles pin with hollow expansion pin with locating hole by the locating slot of self, and simple in structure, fiting effect is good;
4, concentric slide block casing drilling tool of the present utility model, when drilling tool moves down, the reamer sheet is rearward slided by the rock resistance and forms reaming with pipe, and the reamer sheet was subjected to the shoe resistance to dwindle withdrawal to lower slider when drilling tool upwards reeled, and need not counter-rotating can directly regain;
5, concentric slide block casing drilling tool of the present utility model is drilled with the steam vent with guider master dreg discharging tunnel equidirectional in the ash pit of center bit middle part, discharge directions is consistent with the direction of slagging tap, and is not subjected to drilling tool pressure to meet soft mud dirt and can be convenient to deslagging by plug-hole;
6, concentric slide block casing drilling tool of the present utility model, the reamer sheet is that easy on and off slides, when spitting, impact cutting then need not the gap of rebounding, the halfpace position of guider is shorter than conventional drilling tool to the distance of reamer sheet, reaming break-up point and shoe distance are near, and dreg discharging tunnel is short, and slag stone falls after rise few, deslagging speed is fast, and the shoe resistance is little, drilling depth is fast;
7, concentric slide block casing drilling tool of the present utility model in whole drilling process, can reduce tube drawing power, easily reclaim, and be difficult for taking place disconnected shoe, with accidents such as pipe, drill bit, drilling rods.
Description of drawings
Fig. 1 is that concentric slide block casing drilling tool of the present utility model is put the part view;
Fig. 2 is the structural representation of guider in the utility model;
Fig. 3 is the structural representation of reamer sheet in the utility model;
Fig. 4 is the structural representation of center bit in the utility model;
Fig. 5 is a concentric slide block casing drilling tool addressee view of the present utility model;
Fig. 6 is the assembling schematic diagram of concentric slide block casing drilling tool of the present utility model.
Mark among the figure: 1-guider, the 2-center bit, 3-reamer sheet, the 4-solid pin, 5-expansion pin, the 6-carbide alloy, 101-guider body, the 102-pin-and-hole, 103-guider air vent, 104-guider ash pit, 105-guider endoporus, 106-drill bit tail end installing hole, the 201-drill body, 202-drill bit step surface, 203-drill bit middle part ash pit, 204-drill bit middle part air vent, 205-drill bit afterbody, 206-pin breach, the 207-center roof vent, the 208-skewed slot, 209-T shape groove, the 210-straight trough, 211-drill bit straight trough air vent, the anterior ash pit of 212-drill bit, the 213-curve slope, the 214-arcuate furrow, 215-straight trough stopper, 301-bores the sheet body, 302-bores sheet arc hypotenuse, 303-bores sheet side intrados, 304-projection body, 305-bores the sheet side, 306-bores the sheet front bevel, 307-bores sheet side convex body.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Center bit of the present utility model, comprise drill body 201 and reamer sheet 3, described drill body 201 is along on its central axis being the front portion, middle part and afterbody, and it is anterior, middle part and afterbody are structure as a whole, drill body 201 front portions are the arrow-shaped structure, the diameter at drill body 201 middle parts is greater than the diameter of front portion, drill body 201 front portions offer at least two skewed slots 208 to the outer peripheral face at middle part, on the two side of described skewed slot 208 rectangular channel is set, make skewed slot 208 be the gathering sill of T shape structure, this skewed slot 208 can be 2,3,4,5 or a plurality of, present embodiment is preferably used 2 skewed slots 208, and 2 skewed slots 208 are distributed on the outer peripheral face of drill body 201 with respect to 180 ° at central axis interval, coupling has reamer sheet 3 in arbitrary skewed slot 208, the initiating terminal of this skewed slot 208 is drill body 201 front portions, also be on the outer peripheral face of arrow-shaped structure, and on drill body 201 middle parts, be groove, reamer sheet 3 is positioned at this skewed slot 208 and its coupling, reamer sheet 3 can be slided in skewed slot 208, described reamer sheet 3 comprises that top combines with the bottom and forms the brill sheet body 301 of T shape structure, its middle and upper part and bottom are structure as a whole, bore sheet body 301 bottoms and be positioned at the middle part, non-circular arc limit of boring sheet body 301, the top semicircular in shape structure of described brill sheet body 301, two are bored sheet body 301 and close up together, can form a similar circular configuration, bore the brill sheet arc hypotenuse 302 of circular arc limit for tilting of sheet body 301, thereby reduce resistance, this place, angle, two ends of boring sheet body 301 is for boring sheet side convex body 307, boring sheet side convex body 307 is the brill sheet side intrados 303 of arcuate structure to boring between sheet body 301 bottoms, on the outer peripheral face at drill body 201 middle parts of skewed slot 208 both sides, be provided with curve slope 213 and arcuate furrow 214; Described curve slope 213 can be fitted mutually with brill sheet side intrados 303, described arcuate furrow 214 can be fitted with brill sheet side convex body 307, the two side of described brill sheet body 301 bottoms is provided with projection body 304, this projection body 304 is a rectangular configuration, and bore sheet body 301 and match with gathering sill, reamer sheet 3 can be slided in gathering sill with the combination of projection body 304.On the external surface of drill body 201 front portions and reamer sheet 3, all be inlaid with carbide alloy 6, the afterbody of drill body 201 is a triangle cylinder, semicircle cylinder, elliptic cylindrical, the quadrangle cylinder, the pentagon cylinder, the hexagon cylinder, the cylinder of multiple structure such as polygon or special-shaped cylinder, but do not select circular cylinder for use, present embodiment in select drill body 201 afterbodys for use cross sectional shape cut round edge for circular by two parallel lines, its two limits are straight line, article two, the limit is a circular arc, thereby be convenient to the afterbody of drill body 201 and guider be positioned and be convenient to transfer torque, wherein the afterbody of this drill body 201 is provided with pin breach 206.The inside of described drill body 201 is provided with center roof vent 207, on the outer peripheral face at drill body 201 middle parts, be provided with drill bit middle part ash pit 203, be provided with the drill bit middle part air vent 204 that is communicated with center roof vent 207 in the ash pit 203 of described drill bit middle part.
The guider that mates with center bit of the present utility model, comprise guider body 201, the outer peripheral face of described guider body 201 is provided with guider ash pit 104, the two ends of guider body 201 are provided with the guider center roof vent along the center, one end of guider body 201 is provided with the non-circular drill bit tail end installing hole 106 that the afterbody with drill body 201 is complementary, this drill bit tail end installing hole can be for tri-angle-holed, semi-circular hole, slotted eye, quadrilateral hole, the pentagon hole, hexagonal hole, multiple hole such as polygonal hole or irregularly-shaped hole, the afterbody that this drill bit tail end installing hole is mainly used in drill body cooperatively interacts, thereby drill body is positioned, and can transfer torque, therefore the drill bit tail end installing hole 106 in the present embodiment is selected the hole identical shaped with the drill body afterbody for use, be that cross sectional shape is that circle is cut round edge by two parallel lines, its two limits are straight line, article two, the limit is the hole of circular arc, the periphery of described guider body 201 is provided with pin-and-hole 102 and the guider air vent 103 that is communicated with the guider center roof vent, described pin-and-hole 102 is for running through the through hole of guider body 201 sidewalls, when center drill bit 2 assembled with guider 1, this through hole can align with pin breach 206.
Concentric slide block casing drilling tool of the present utility model, center bit in the foregoing description and guider are made up, wherein said reamer sheet 3 is positioned at the skewed slot 208 of drill body 201, reamer sheet 3 can slide in skewed slot 208, and the cooperation of the afterbody of described drill body 201 is installed in the drill bit tail end installing hole 106, the guider center roof vent is communicated with center roof vent 207, can from the guider center roof vent, ventilate and import in the center roof vent 207, drill bit middle part ash pit 203 is communicated with guider ash pit 104, be convenient to the drill bit deslagging, described pin breach 206 aligns with pin-and-hole 102, and it is interior fixing with center bit 2 with guider 1 to insert pin-and-hole 102 by solid pin 4, and the expansion pin 5 that described solid pin 4 is inserted in the pin-and-hole 102 is spacing.
The concentric slide block casing drilling tool that employing center bit of the present utility model and guider are combined to form, with one heart under the slide block casing drilling tool when mobile the reamer sheet rearward slided along the T type skewed slot of center bit by the rock resistance, form reaming with pipe with guider end face location.When the slide block casing drilling tool upwards reeled with one heart, the reamer sheet was subjected to the shoe resistance to dwindle withdrawal to lower slider.Because of air latent drift angled-lift splits concentric simultaneous casing drilling tool of the present utility model when the bounce-back of work impact grinding rock, semicircle reamer sheet slides up and down along T type skewed slot and arc slot, need not lash space, guider correcting position is shorter than conventional drilling tool, and reaming break-up point and shoe distance are near, and it is little, few that slag stone falls after rise, dreg discharging tunnel is short, deslagging speed is fast, and the shoe resistance is little, and drilling depth is fast.
As shown in Figure 3 and Figure 4, embodiment 3 is on the basis of embodiment 1, center bit of the present utility model, drill body 201 front portions are the round boss structure, make drill body 201 front portions present the multistage boss of notch cuttype, adopt three grades of boss in this example, i.e. three grades of hierarchic structures, certainly can adopt 2 grades of boss structures or 4 grades of boss structures or 5 grades of boss structures or more multistage boss structure according to actual needs, between the boss at different levels with inclined-plane tapering transition reducing, make drill body 201 from beginning the diameter minimum foremost, increase gradually then, and carry out transition by the inclined-plane tapering, in the present embodiment, described skewed slot 208 is 3, and three skewed slots 208 are distributed on the outer peripheral face of drill body 201 with respect to 120 ° at central axis interval, coupling has reamer sheet 3 in arbitrary skewed slot 208, the straight trough 210 that is communicated with skewed slot 208 also is set in drill body 201 front portions, this straight trough 210 is communicated with skewed slot 208, the initiating terminal of straight trough 210 is positioned at drill body 201, on the sidewall of the boss foremost of drill body 201 front portions, be provided with the anterior ash pit 212 of the drill bit that links to each other with straight trough 210 initiating terminals, carry out deslagging thereby be convenient to drill body 201 anterior tops; Reamer sheet 3 can slide in the straight trough 210 in skewed slot 208, the width of drill body 201 afterbodys is less than the middle part diameter, and the circular arc limit portion of three reamer sheets 3 is stitched together, can form similar and circular configuration, can form the boss of afterbody, thereby be convenient to reaming, whole center bit front end area is little, area increases gradually then, and stressed concentrate met the classification of can going ahead of the rest of harder or bigger rock and smashed.On the two side of described skewed slot 208 rectangular channel is set, among dovetail groove or the dovetail groove any, make skewed slot 208 be the gathering sill of T shape structure, present embodiment is selected rectangular channel for use, the afterbody of described drill body 201 is a triangle cylinder, it can certainly be semicircle cylinder that triangle cylinder is provided with pin breach 206, elliptic cylindrical, the quadrangle cylinder, the pentagon cylinder, the hexagon cylinder, a kind of in the medium non-circular cylinder of polygon or special-shaped cylinder, thereby be convenient to location and transfer torque, triangle cylinder is provided with pin breach 206, the inside of described drill body 201 is provided with center roof vent 207, on the outer peripheral face at drill body 201 middle parts, be provided with drill bit middle part ash pit 203, be provided with the drill bit middle part air vent 204 that is communicated with center roof vent 207 in the ash pit 203 of described drill bit middle part, be provided with the drill bit straight trough air vent 211 that is communicated with center roof vent 207 in the described straight trough 210, discharge directions is consistent with the direction of slagging tap, and meets soft mud dirt and can not be convenient to deslagging by plug-hole.On the outer peripheral face at drill body 201 middle parts of skewed slot 208 both sides, be provided with curve slope 213 and arcuate furrow 214; Described curve slope 213 can be fitted mutually with brill sheet side intrados 303, described arcuate furrow 214 can be fitted with brill sheet side convex body 307, be beneficial to seamlessly transitting of reamer sheet and center bit cylindrical and reduce moment of torsion strength, bore the wedge structure of bottom for tilting of sheet body 301, form and bore sheet front bevel 306, when reamer sheet 3 when skewed slot 208 slides to straight trough 210, this brill sheet front bevel 306 can fit with straight trough 210, thereby make and be arc-shaped transition between the external surface of the external surface of reamer sheet 3 and drill body, and the circular arc limit portion of three reamer sheets 3 closes up together, form similar circular configuration as shown in Figure 5, and be positioned at the front portion of drill body.No obvious broken line between three semicircle reamer sheets when center bit cylindrical and reaming, arc transition reduces rotary resistance.
As shown in Figure 2, the guider that mates with center bit of the present utility model, comprise guider body 201, the outer peripheral face of described guider body 201 is provided with guider ash pit 104, the two ends of guider body 201 are provided with the guider center roof vent along the center, one end of guider body 201 is provided with the drill bit tail end installing hole 106 in the triangular column hole that the afterbody with drill body 201 is complementary, the periphery of described guider body 201 is provided with pin-and-hole 102 and the guider air vent 103 that is communicated with the guider center roof vent, described pin-and-hole 102 is for running through the through hole of guider body 201 sidewalls, when center drill bit 2 assembled with guider 1, this through hole can align with pin breach 206.
As Fig. 1, Fig. 5 and shown in Figure 6, the concentric slide block casing drilling tool that employing center bit of the present utility model and guider are combined to form, described reamer sheet 3 is positioned at the skewed slot 208 and straight trough 210 of drill body 201, reamer sheet 3 can slide in skewed slot 208 and straight trough 210, realize addressee and reaming, can slide with respect to skewed slot 208, the afterbody cooperation of described drill body 201 is installed in the drill bit tail end installing hole 106, with transfer torque, the guider center roof vent is communicated with center roof vent 207, drill bit middle part ash pit 203 is communicated with guider ash pit 104, described pin breach 206 aligns with pin-and-hole 102, and insert in the pin-and-hole 102 guider 1 is fixing with center bit 2 by solid pin 4, the expansion pin 5 that described solid pin 4 is inserted in the pin-and-hole 102 is spacing, under confined state, center bit and guider are linked together being used for, in skewed slot, deviate from the course of the work to prevent semicircle reamer sheet.
The concentric slide block casing drilling tool that employing center bit of the present utility model and guider are combined to form, as shown in Figure 1, with one heart under the slide block casing drilling tool when mobile, the reamer sheet is rearward slided along the T type skewed slot of center bit by the rock resistance, forms reaming with pipe with guider end face location.As shown in Figure 5, when the slide block casing drilling tool upwards reeled with one heart, the reamer sheet was subjected to the shoe resistance to dwindle withdrawal to lower slider.Because of air latent drift angled-lift splits concentric simultaneous casing drilling tool of the present utility model when the bounce-back of work impact grinding rock, semicircle reamer sheet slides up and down along T type skewed slot and arc slot, need not lash space, guider correcting position is shorter than conventional drilling tool, and reaming break-up point and shoe distance are near, and it is little, few that slag stone falls after rise, dreg discharging tunnel is short, deslagging speed is fast, and the shoe resistance is little, and drilling depth is fast.
Assemble this concentric slide block casing drilling tool: earlier that the flank of tooth that is inlaid with carbide alloy of center bit is downward, then three reamer sheets are inserted to respectively in the skewed slot of center bit, triangle dowel hole on the guider has the direction of pin-and-hole, align the sub-breach direction of serration spline pivot pin of center bit, the triangle dowel hole cover of guider is installed on the triangular prism of center bit.After this, connecting pin is inserted in the pin-and-hole of guider, pound again, prevent that solid pin from coming off, center bit and guider are linked together into hollow expansion pin.
The downward three reamer sheets of concentric slide block casing drilling tool arrive the front end of center bit during use in the effect lower slider of own wt, promptly be in the addressee state, position shown in Figure 5, or make it be in the addressee state below manually three reamer sheets being pushed to, be inserted in the sleeve pipe then, the rotation drilling tool makes center bit and three reamer sheets pass shoe, opens gas work then.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. center bit, it is characterized in that: it comprises drill body (201) and reamer sheet (3), described drill body (201) is along on its central axis being the front portion, middle part and afterbody, drill body (201) front portion is arrow-shaped, taper or round boss structure, the diameter at drill body (201) middle part is greater than the diameter of front portion, drill body (201) is anterior to offer at least two skewed slots (208) to the outer peripheral face at middle part, the initiating terminal of this skewed slot (208) is drill body (201) front portion, and at drill body (201) middle part is groove, reamer sheet (3) is positioned at this skewed slot (208) and its coupling, reamer sheet (3) can be slided in skewed slot (208), all be inlaid with carbide alloy (6) on the external surface of drill body (201) front portion and reamer sheet (3), the afterbody of drill body (201) is non-circular cylinder.
2. center bit as claimed in claim 1, it is characterized in that: to the outer peripheral face at middle part, offer three skewed slots (208) in drill body (201) front portion, and three skewed slots (208) are distributed on the outer peripheral face of drill body (201) with respect to 120 ° at central axis interval, and coupling has reamer sheet (3) in arbitrary skewed slot (208).
3. center bit as claimed in claim 2 is characterized in that: on the two side of described skewed slot (208) rectangular channel, dovetail groove or dovetail groove are set, make skewed slot (208) be the gathering sill of T shape structure.
4. center bit as claimed in claim 1, it is characterized in that: the afterbody of described drill body (201) is triangle cylinder, semicircle cylinder, elliptic cylindrical, quadrangle cylinder, pentagon cylinder or hexagon cylinder, and the afterbody of drill body (201) is provided with pin breach (206).
5. as claim 1 or 2 or 3 or 4 described center bits, it is characterized in that: described drill body (201) is anterior to be the round boss structure, make drill body (201) front portion present the multistage boss of notch cuttype, between the boss at different levels with inclined-plane tapering transition reducing, in drill body (201) front portion the straight trough (210) that is communicated with skewed slot (208) is set also, the initiating terminal of straight trough (210) is positioned at drill body (201); On the sidewall of the anterior boss foremost of drill body (201), be provided with the anterior ash pit (212) of the drill bit that links to each other with straight trough (210) initiating terminal; Reamer sheet (3) can slide in the straight trough (210) in skewed slot (208), and the width of drill body (201) afterbody is less than the middle part diameter.
6. center bit as claimed in claim 5, it is characterized in that: the inside of described drill body (201) is provided with center roof vent (207), on the outer peripheral face at drill body (201) middle part, be provided with drill bit middle part ash pit (203), be provided with the drill bit middle part air vent (204) that is communicated with center roof vent (207) in the described drill bit middle part ash pit (203), be provided with the drill bit straight trough air vent (211) that is communicated with center roof vent (207) in the described straight trough (210).
7. as claim 3 or 4 or 6 described center bits, it is characterized in that: described reamer sheet (3) comprises that top combines with the bottom and forms the brill sheet body (301) of T shape structure, the top semicircular in shape structure of described brill sheet body (301), bore sheet body (301) bottom and be positioned at the middle part, non-circular arc limit of boring sheet body (301), bore the brill sheet arc hypotenuse (302) of circular arc limit for tilting of sheet body (301), this place, angle, two ends of boring sheet body (301) is for boring sheet side convex body (307), bore sheet side convex body (307) and be the brill sheet side intrados (303) of arcuate structure to boring between sheet body (301) bottom, the two side of described brill sheet body (301) bottom is provided with projection body (304), bore sheet body (301) and match with gathering sill, reamer sheet (3) can be slided in gathering sill with the combination of projection body (304).
8. center bit as claimed in claim 7 is characterized in that: on the outer peripheral face at drill body (201) middle part of skewed slot (208) both sides, be provided with curve slope (213) and arcuate furrow (214); Described curve slope (213) can be fitted mutually with boring sheet side intrados (303), and described arcuate furrow (214) can be fitted with brill sheet side convex body (307).
9. guider with the center bit of one of right 1 to 8 coupling, it is characterized in that: comprise guider body (201), the outer peripheral face of described guider body (201) is provided with guider ash pit (104), the two ends of guider body (201) are provided with the guider center roof vent along the center, one end of guider body (201) is provided with the non-circular drill bit tail end installing hole (106) that the afterbody with drill body (201) is complementary, the periphery of described guider body (201) is provided with pin-and-hole (102) and the guider air vent (103) that is communicated with the guider center roof vent, described pin-and-hole (102) is for running through the through hole of guider body (201) sidewall, when center drill bit (2) assembled with guider (1), this pin-and-hole (102) can align with pin breach (206).
10. the concentric slide block casing drilling tool that is combined to form of the guider of a center bit that adopts one of claim 1 to 8 and claim 9, it is characterized in that: described reamer sheet (3) is positioned at the skewed slot (208) of drill body (201), the afterbody cooperation of described drill body (201) is installed in the drill bit tail end installing hole (106), the guider center roof vent is communicated with center roof vent (207), drill bit middle part ash pit (203) is communicated with guider ash pit (104), described pin breach (206) aligns with pin-and-hole (102), and it is interior fixing with guider (1) and center bit (2) to insert pin-and-hole (102) by solid pin (4), and the expansion pin (5) that described solid pin (4) is inserted in the pin-and-hole (102) is spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549095 CN203097720U (en) | 2011-11-10 | 2012-10-24 | Concentric slide block simultaneous casing drilling tool, central drill bit and centralizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120442694.6 | 2011-11-10 | ||
| CN201120442694 | 2011-11-10 | ||
| CN 201220549095 CN203097720U (en) | 2011-11-10 | 2012-10-24 | Concentric slide block simultaneous casing drilling tool, central drill bit and centralizer |
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| Publication Number | Publication Date |
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| CN203097720U true CN203097720U (en) | 2013-07-31 |
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| CN201210410945.1A Active CN102926663B (en) | 2011-11-10 | 2012-10-24 | Concentric sliding block simultaneous casing drilling tool, center drilling bit and centralizer |
| CN 201220549095 Withdrawn - After Issue CN203097720U (en) | 2011-11-10 | 2012-10-24 | Concentric slide block simultaneous casing drilling tool, central drill bit and centralizer |
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| CN201210410945.1A Active CN102926663B (en) | 2011-11-10 | 2012-10-24 | Concentric sliding block simultaneous casing drilling tool, center drilling bit and centralizer |
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| CN (2) | CN102926663B (en) |
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- 2012-10-24 CN CN 201220549095 patent/CN203097720U/en not_active Withdrawn - After Issue
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| CN102926663A (en) | 2013-02-13 |
| CN102926663B (en) | 2015-03-11 |
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