CN103485723A - Device and method for controlling RWD (reaming while drilling) drilling pressure distribution relationship - Google Patents

Device and method for controlling RWD (reaming while drilling) drilling pressure distribution relationship Download PDF

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Publication number
CN103485723A
CN103485723A CN201210195004.0A CN201210195004A CN103485723A CN 103485723 A CN103485723 A CN 103485723A CN 201210195004 A CN201210195004 A CN 201210195004A CN 103485723 A CN103485723 A CN 103485723A
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China
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drill
reamer
wing
pilot bit
pressure
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CN201210195004.0A
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CN103485723B (en
Inventor
马汝涛
林雅玲
王辉
任荣权
王宏伟
纪友哲
李显义
韩飞
贾涛
朱英杰
王雪
卢静
耿莉
田毅
王金宏
刘洋
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China National Petroleum Corp
CNPC Engineering Technology R&D Co Ltd
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China National Petroleum Corp
CNPC Drilling Research Institute Co Ltd
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Abstract

The invention discloses a device for controlling RWD (reaming while drilling) drilling pressure distribution relationship, and belongs to the field of drilling equipment. The device comprises an RWD device (1), a short drill collar (2) and a pilot bit (3), wherein the RWD device (1) is connected with the upper end of the short drill collar (2), the lower end of the short drill collar (2) is connected with the pilot bit (3), at least one reaming cutter assembly (11) is arranged on the RWD device (1), and the diameter of the pilot bit (3) is smaller than the outer diameter of the RWD device (1) in the expansion state of the reaming cutter assembly (11). The invention also discloses a method for utilizing the device for controlling the RWD drilling pressure distribution relationship. The RWD drilling pressure distribution relationship can be controlled within the set range through regulating the cutting depth per revolution of the pilot bit and the cutting capability of a seaming device, and the safety and the stability of the reaming process are enhanced.

Description

Control is with the device and method that bores reaming hole the pressure of the drill relations of distribution
Technical field
The present invention relates to the drilling equipment field, particularly a kind of control is with the device that bores reaming hole the pressure of the drill relations of distribution and control with the method for boring reaming hole the pressure of the drill relations of distribution.Can rationally adjust with the pressure of the drill relations of distribution of boring in the reaming hole process, improve the safety and stability of reaming hole operation.
Background technology
Drilling technology with in boring the reaming hole process, the relations of distribution of the pressure of the drill between pilot bit and drill-following reamer are one of parameters that need special concern, if the pressure of the drill relations of distribution are unreasonable, very easily cause stick-slip or the violent oscillation crosswise of neck eye drill string, drilling tool damages too early, and rate of penetration decreases.
Recently meaning of the pressure of the drill that the pressure of the drill relations of distribution are generally born separately with pilot bit and drill-following reamer, generally arrange the pressure of the drill distribution ratio of pilot bit and drill-following reamer with alphabetical f wsign,
f w = W r W b
W wherein bborn the pressure of the drill by pilot bit, Wr is born the pressure of the drill by drill-following reamer.
Normally, f waffected by the sectional area of pilot bit and drill-following reamer institute broken formation larger, thereby often with the cross-sectional area on drill-following reamer and pilot bit excision stratum, be compared to the ratio of the two suffered the pressure of the drill during estimation.It is single that this method relates to factor, and accuracy rate is not high, is difficult to accordingly correct coupling design with boring required pilot bit and the reamer of reaming hole.
Prior art has the thick cylinder that the borehole wall is considered as being subject to interior external pressure, analyzed the compressive strength difference on pilot bit and stratum that drill-following reamer cuts, the calculating that has proposed to characterize the alias index of above-mentioned difference and be introduced into the pressure of the drill distribution ratio, but this method hypothesis drill-following reamer is identical with the power of pilot bit rock cutting, and the adaptation field is narrower.
In realizing process of the present invention, the inventor finds that at least there is following problem in prior art: existing drilling tool can not rationally be adjusted with the pressure of the drill relations of distribution of boring in the reaming hole process, has larger safety and stability hidden danger in the reaming hole operation; And without effective method, can instruct the design of drill-following reamer and pilot bit to guarantee that the pressure of the drill distribution ratio is in rational scope.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provides a kind of control with the device that bores reaming hole the pressure of the drill relations of distribution and has controlled with the method for boring reaming hole the pressure of the drill relations of distribution, can rationally adjust with the pressure of the drill relations of distribution of boring in the reaming hole process, instruct the design process of drill-following reamer and pilot bit, and then improve the safety and stability of reaming hole operation.Described technical scheme is as follows:
On the one hand, provide a kind of control with the device that bores reaming hole the pressure of the drill relations of distribution, described device comprises: drill-following reamer, stub boring are quickly and pilot bit, described drill-following reamer is connected with described stub boring upper end quickly, described stub boring lower end quickly is connected with described pilot bit, be provided with at least one reaming hole toolbox on described drill-following reamer, the diameter of described pilot bit is less than the external diameter of described drill-following reamer under described reaming hole toolbox expansion state.Like this, the footpath, neck eye hole of pilot bit cutting is less, and drill-following reamer continues cutting on the neck eye basis of pilot bit cutting, makes the footpath, main borehole hole of again being cut by drill-following reamer enlarge, and is conducive to balance drilling tool and the discharge that is cut mudstone.
Further, described reaming hole toolbox comprises reamer wing, wing cutting teeth and wing stable section, and described reamer wing telescopically is arranged on described reaming hole toolbox, and described wing cutting teeth and described wing stable section are covered on described reamer wing; Described wing stable section is arranged on the middle part of described reaming hole toolbox, and the two ends of described wing stable section are provided with described wing cutting teeth.The reaming hole toolbox integrally along the circumferential direction is arranged on the rod member of drill-following reamer, and the reaming hole toolbox is enlargement and contraction operationally.Wherein the outline line of reamer wing is comparatively sharp-pointed, can cut the ground of different geology; The wing cutting teeth is the PDC cutting teeth, have than the large forward leaning angle of existing cutting dental transition, thereby its cutting power is strengthened greatly; The wing stable section is covered in the middle part of reaming hole toolbox, and it is mainly used in stablizing reamer wing, wing cutting teeth in cutting reaming hole process by the carbide alloy manufacture, improves the stability of whole drilling tool, and this wing stable section does not have cutting power.
Further, described wing cutting teeth is the taper cutting teeth that top rake is 25 °～30 °.
Further, be provided with three, four or six described reaming hole toolboxs on described drill-following reamer.Be preferably three reaming hole toolboxs are set on drill-following reamer, its spreading performance and symmetric stability can be better like this.
Further, be provided with many neck eye wings on described pilot bit, between every two described neck wings for returning the bits groove; The nose of described neck eye wing is provided with wear-resistant pad, and the same lateral edges of many described neck eye wings is provided with Cutter, and described wear-resistant pad partly covers described Cutter.The bizet be preferably at pilot bit arranges four neck eye wings, at four, leads four roads of the interval parts formation indent of eye wings to return the bits groove, and the ground cut by neck eye wing is discharged by returning the bits groove.Be provided with abreast a plurality of Cutters at top and shoulder by neck eye wing, those Cutters are the PDC cutting teeth, have larger cutting power.At every wear-resistant pad of leading the nose setting of eye wing, its surfacing, do not possess cutting power, but can change by the thickness of adjusting those wear-resistant pads the cutting power of Cutter.So-called wear-resistant pad partly covers Cutter, but these capped Cutters are all not capped.A wear-resistant pad surfacing, in the wing place, is returned bits groove place wear-resistant pad is not set.In addition, for further increasing the cutting power ratio of drill-following reamer and pilot bit, also can be adjusted Cutter setting angle and the cutter set density of pilot bit.Basic law is: the Cutter top rake is larger, and cutting power is stronger; Cutter set density is less, and cutting power is stronger.
Further, each only on described neck eye wing spacing ground be disposed with several described Cutters, be arranged between each Cutter on a neck wing certain gap arranged.
Further, described wear-resistant pad is the hard alloy layer that thickness is 2～3mm.
Further, the tooth footpath of described wing cutting teeth is less than the tooth footpath of described Cutter.
On the other hand, provide a kind of control with the method for boring reaming hole the pressure of the drill relations of distribution, with boring reaming hole the pressure of the drill distribution ratio f wfactor except the geometric area of neck eye and main borehole than also have the cutting power etc. of formation characteristics, drilling tool self, described method comprises: according to the Teale(name, in 1964, propose) rock that proposes is than merit expression formula:
E s = W A + 120 π · Ω · W · T A · v - - - ( 1 )
In formula (1), E sfor rock compares merit; W is the pressure of the drill; A is the sectional area that rock crushing tool cutting stratum generates well; T is moment of torsion; Ω is rotating speed; V is rate of penetration.
Derive the pressure of the drill distribution ratio f wfor:
f w = W r W b = σ r σ b · η b η r · k b k r · A r A b - - - ( 2 )
In formula (2), k rfor reamer acutance, k bfor the drill bit acutance; η bfor drill bit drilling efficiency, η rfor reamer drilling efficiency, σ rfor boring, reamer meets rock stratum compressive strength, σ bfor bit drills is met rock stratum compressive strength, A bfor the neck eye sectional area that the bit cutting stratum generates, A rfor reamer enlarges the annular cross-sectional area formed after the neck eye.
When drill-following reamer and pilot bit distance is closer, be considered as described drill-following reamer and described pilot bit in stratum of the same race, the pressure of the drill distribution ratio f wonly relevant to the cutting power of described drill-following reamer and described pilot bit.Normally, evaluation drilling tool cutting power index the most intuitively is rate of penetration, and when the drilling tool of equal nominal dimension creeps into same stratum under the same process condition, rate of penetration is faster, and cutting power is stronger.
Drill-following reamer is with the consumable accessory bored in the reaming hole drilling assembly, therefore pays close attention to the pressure of the drill particular importance that drill-following reamer bears.The expression formula of the pressure of the drill distribution ratio is rewritten as:
f r = W R W R + W B = 1 - 1 f W + 1
Wherein, f rfor acting on the pressure of the drill portion in total the pressure of the drill on drill-following reamer, it has been generally acknowledged that f rthe reaming hole process is comparatively stable between 20～35% the time, now f wbe about 30～50%.The difference of below considering drill-following reamer and the two cutting power of pilot bit is born the rule that affects of the pressure of the drill on drill-following reamer.With f rfor function, k r/ k bfor variable, draw relation curve as shown in Figure 1.
Curve in Fig. 1 shows, in the situation of other parameter constants, with boring the more stronger (k of cutting power of reamer wing r/ k blarger), its pressure of the drill of getting is less; Otherwise, with boring the more more weak (k of cutting power of reamer wing r/ k bless), its pressure of the drill of getting is larger; In the situation that the most extreme, drill-following reamer at all can not be cut stratum (k r/ k bbe 0), the pressure of the drill meeting 100% puts on reamer wing so.
According to above-mentioned principle, can control with boring reaming hole the pressure of the drill relations of distribution by the cutting power relation of adjusting pilot bit and drill-following reamer.
Further, described method also comprises:
S1, adjust the wear-resistant pad thickness of described pilot bit, controls the maximum depth of cut that described pilot bit often turns and change the cutting power of described pilot bit;
S2, change the reamer wing cloth tooth mode of described drill-following reamer, makes the cutting power of described reamer wing be better than the cutting power of described pilot bit;
By the adjustment in S1 and S2 step, control the pressure of the drill relations of distribution of described drill-following reamer and described pilot bit.
The specific design method of adjusting the drilling tool cutting power is as follows:
At first, determine neck eye diameter and main borehole diameter, try to achieve geometric area and compare A r/ A b; Secondly, default the pressure of the drill distribution ratio f w, in conjunction with A r/ A bcan try to achieve the drilling tool acutance and compare k r/ k b; Finally, use said method to adjust the acutance of pilot bit and drill-following reamer, and tested, the pressure of the drill distribution ratio can be limited in comparatively rational scope.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought also comprises: by disclosing a kind of drilling tool cutting power of adjusting to control with the devices and methods therefor that bores reaming hole the pressure of the drill relations of distribution,
1, consider the characteristic of property of pilot bit and drill-following reamer in the design process of drill-following reamer and reaming hole toolbox, the two cutting power of Proper Match, by the cutting power of adjusting drill-following reamer and pilot bit, control with boring reaming hole the pressure of the drill relations of distribution, simple to operation;
2, computational methods are easy, and result is more accurate than traditional approach, is convenient to the field;
3, the pilot bit proposed and reamer wing structure are easy to adjust, and can set as required design parameter.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the relation curve schematic diagram of reaming hole the pressure of the drill ratio of the present invention and reamer wing cutting power;
Fig. 2 is the structural representation of the control that provides of the embodiment of the present invention one with the device that bores reaming hole the pressure of the drill relations of distribution;
Fig. 3 is the reaming hole toolbox structural representation of the device that provides of the embodiment of the present invention one;
Fig. 4 is the pilot bit structural representation of the device that provides of the embodiment of the present invention one;
Fig. 5 is the top view of the pilot bit of this Fig. 3.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment mono-
The present embodiment provides a kind of control with the device that bores reaming hole the pressure of the drill relations of distribution, referring to Fig. 2, this device comprises drill-following reamer 1, stub boring quickly 2 and pilot bit 3, drill-following reamer 1 quickly is connected 2 upper end with stub boring, stub boring quickly 2 lower end is connected with pilot bit 3, be provided with at least one reaming hole toolbox 11 on drill-following reamer 1, the diameter of pilot bit 3 is less than the external diameter of drill-following reamer 1 under reaming hole toolbox 11 expansion states.Pilot bit 3 is arranged on device bottom, uses pilot bit 3 broken formations to form the less neck eye of diameter; Drill-following reamer 1 is arranged on the drill string upper end of this device, and the cutting diameter after drill-following reamer 1 expansion is greater than the cutting diameter of pilot bit 3, and drill-following reamer 1 high-ranking military officer's eye is expanded as the main borehole that diameter is larger.
Reaming hole toolbox 11 is fixed on the outer wall of drill-following reamer 1 along the circumferencial direction of drill-following reamer 1, offer the cavity that can hold reaming hole toolbox 11 on the periphery wall of drill-following reamer 1, reaming hole toolbox 11 is installed in this cavity and when contraction state, its external diameter is a bit larger tham the external diameter of drill-following reamer 1 mobile jib, or both are basically identical.Lower position at the reaming hole toolbox 11 of drill-following reamer 1 arranges cutter protection part 12; while putting in the drilling well the inside under whole drilling tool; when reaming hole toolbox 11 is not opened work; the neck eye that diameter is less may collide reaming hole toolbox 11, and the setting of cutter protection part 12 avoided reaming hole toolbox 11 under extend through in journey damaged.
Preferably, be provided with four reaming hole toolboxs 11 on drill-following reamer 1, like this, drill-following reamer 1 had both had stronger cutting power, had again good balance quality.As other embodiment, can be as required on this drill-following reamer 1 and consider that mechanical characteristic arranges the reaming hole toolbox 11 of three or six or other quantity.
In conjunction with referring to Fig. 3, reaming hole toolbox 11 comprises reamer wing 101, wing cutting teeth 102 and wing stable section 103, reamer wing 101 telescopicallies are arranged on reaming hole toolbox 11, wing cutting teeth 102 and wing stable section 103 are covered on reamer wing 101, wing stable section 103 is arranged on the middle part of reaming hole toolbox 11, and the two ends of wing stable section 103 are provided with wing cutting teeth 102.This wing cutting teeth 102 is elected the PDC cutting teeth as, makes the cutting power of wing cutting teeth 102 stronger; This wing stable section 103 forms for the Hardmetal materials manufacture, wing stable section 103 covers on reamer wing 101, be positioned at the medium position of reamer wing 101, and be fixedly connected on drill-following reamer 1 mobile jib, strengthen reamer wing and the stability of wing cutting teeth in working angles, thereby improved the stability of whole drilling tool.Preferably, wing cutting teeth 102 is taper cutting teeths that top rake is 25 °～30 °, with existing wing cutting teeth, compares, and has strengthened the forward leaning angle of wing cutting teeth, thereby has strengthened the cutting power of this wing cutting teeth 102.
Embodiment bis-
The present embodiment provides a kind of control with the device that bores reaming hole the pressure of the drill relations of distribution, this device comprises drill-following reamer 1, stub boring quickly 2 and pilot bit 3, the drill-following reamer 1 of this device, stub boring are quickly 2 identical with the annexation in embodiment mono-with the annexation of pilot bit 3, parts that the drill-following reamer 1 of this device the is included and annexation of each parts is identical with embodiment mono-or on the basis that can realize embodiment mono-same function, rational improvement and optimization are arranged.
In conjunction with referring to Fig. 4 and Fig. 5, the bizet of pilot bit 3 is provided with many neck eye wings 31, consider groove 32 to be worth doing for returning between every neck eye wing 31, the end of neck eye wing 31 is provided with wear-resistant pad 301, the same lateral edges of many neck eye wings 31 is provided with Cutter 302, and wear-resistant pad 301 partly covers part Cutter 302.Neck eye wing 31 considers with returning the bizet that groove 32 is spaced apart and arranged in pilot bit 3 to be worth doing, can greatly improve the cutting power of Cutter 302 and cut into speed, can in time the ground be cut be discharged by returning bits groove 32.Only lead on eye wing 31 and be disposed with several Cutters 302 to spacing at each, those Cutters 302 are the PDC cutting teeth.Wear-resistant pad 301 is hard alloy layers that thickness is 2mm～3mm, the wear-resistant pad 301 that this carbide alloy is made does not possess cutting power, can change by the thickness that changes wear-resistant pad 301 height that Cutter 302 exposes neck eye wing 31 and wear-resistant pad 301, Cutter 302 exposes higher, and its cutting power is stronger; Otherwise Cutter 302 exposes lower, its cutting power is more weak.Therefore, can change by the thickness that changes wear-resistant pad 301 cutting power of pilot bit 3, thereby adjust with boring reaming hole the pressure of the drill relations of distribution.
Preferably, the tooth footpath of the wing cutting teeth 102 on drill-following reamer 1 is less than the tooth footpath of the Cutter 302 on pilot bit 3.Make wing cutting teeth 102 lead the cutting ability on wall near the eyes better.
Embodiment tri-
The embodiment of the present invention provides a kind of control with the method for boring reaming hole the pressure of the drill relations of distribution, with boring reaming hole the pressure of the drill distribution ratio f wfactor except the geometric area of neck eye and main borehole than also have the cutting power of formation characteristics, drilling tool self.The method comprises, according to the Teale rock than merit expression formula:
E s = W A + 120 π · Ω · W · T A · v - - - ( 1 )
In formula (1), E sfor rock compares merit; W is the pressure of the drill; A is the sectional area that rock crushing tool cutting stratum generates well; T is moment of torsion; Ω is rotating speed; V is rate of penetration.
Derive the pressure of the drill distribution ratio f wfor:
f w = W r W b = σ r σ b · η b η r · k b k r · A r A b - - - ( 2 )
In formula (2), k rfor reamer acutance, k bfor the drill bit acutance; η bfor drill bit drilling efficiency, η rfor reamer drilling efficiency, σ rfor boring, reamer meets rock stratum compressive strength, σ bfor bit drills is met rock stratum compressive strength, A bfor the neck eye sectional area that the bit cutting stratum generates, A rfor reamer enlarges the annular cross-sectional area formed after the neck eye.
When closer, be considered as drill-following reamer 1 and pilot bit 3 in stratum of the same race, the pressure of the drill distribution ratio f when drill-following reamer 1 and pilot bit 3 distances wonly relevant to the cutting power of drill-following reamer 1 and pilot bit 3.Normally, evaluation drilling tool cutting power index the most intuitively is rate of penetration, and when the drilling tool of equal nominal dimension creeps into same stratum under the same process condition, rate of penetration is faster, and cutting power is stronger.
Drill-following reamer is with the consumable accessory bored in the reaming hole drilling assembly, therefore pays close attention to the pressure of the drill particular importance that drill-following reamer bears.The expression formula of the pressure of the drill distribution ratio is rewritten as:
f r = W R W R + W B = 1 - 1 f W + 1
Wherein, f rfor acting on the pressure of the drill portion in total the pressure of the drill on drill-following reamer, it has been generally acknowledged that f rthe reaming hole process is comparatively stable between 20～35% the time, now f wbe about 30～50%.The difference of below considering drill-following reamer and the two cutting power of pilot bit is born the rule that affects of the pressure of the drill on drill-following reamer.With f rfor function, k r/ k bfor variable, draw relation curve as shown in Figure 1.
Curve in Fig. 1 shows, in the situation of other parameter constants, with boring the more stronger (k of cutting power of reamer wing r/ k blarger), its pressure of the drill of getting is less; Otherwise, with boring the more more weak (k of cutting power of reamer wing r/ k bless), its pressure of the drill of getting is larger; In the situation that the most extreme, drill-following reamer at all can not be cut stratum (k r/ k bbe 0), the pressure of the drill meeting 100% puts on reamer wing so.
According to above-mentioned principle, can control with boring reaming hole the pressure of the drill relations of distribution by the cutting power relation of adjusting pilot bit and drill-following reamer.
Determining that impact is with boring reaming hole the pressure of the drill distribution ratio f wfactor after, the method also comprises:
S1, adjust wear-resistant pad 301 thickness of pilot bit 3, controls the maximum depth of cut that pilot bit 3 often turns and change the cutting power of pilot bit 3;
S2, change the reamer wing 101 cloth tooth modes of drill-following reamer 1, makes the cutting power of reamer wing 101 be better than the cutting power of pilot bit 3;
By the adjustment in S1 and S2 step, control the pressure of the drill relations of distribution of drill-following reamer 1 and pilot bit 3.
The further method for designing of adjusting the drilling tool cutting power has:
At first, determine neck eye diameter and main borehole diameter, try to achieve geometric area and compare A r/ A b; Secondly, default the pressure of the drill distribution ratio f w, in conjunction with A r/ A bcan try to achieve the drilling tool acutance and compare k r/ k b; Finally, use said method to adjust the acutance of pilot bit and drill-following reamer, and tested, the pressure of the drill distribution ratio can be limited in comparatively rational scope.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (10)

1. a control is with the device that bores reaming hole the pressure of the drill relations of distribution, described device comprises drill-following reamer (1), stub boring quickly (2) and pilot bit (3), described drill-following reamer (1) quickly is connected the upper end of (2) with described stub boring, the described stub boring quickly lower end of (2) is connected with described pilot bit (3), it is characterized in that:
Be provided with at least one reaming hole toolbox (11) on described drill-following reamer (1), the diameter of described pilot bit (3) is less than the external diameter of described drill-following reamer (1) under described reaming hole toolbox (11) expansion state.
2. device according to claim 1, it is characterized in that, described reaming hole toolbox (11) comprises reamer wing (101), wing cutting teeth (102) and wing stable section (103), it is upper that described reamer wing (101) telescopically is arranged on described reaming hole toolbox (11), and described wing cutting teeth (102) and described wing stable section (103) are covered on described reamer wing (101);
Described wing stable section (103) is arranged on the middle part of described reaming hole toolbox (11), and the two ends of described wing stable section (103) are provided with described wing cutting teeth (102).
3. device according to claim 2, is characterized in that, described wing cutting teeth (102) is the taper cutting teeth that top rake is 25 °～30 °.
4. device according to claim 1, is characterized in that, is provided with three, four or six described reaming hole toolboxs (11) on described drill-following reamer (1).
5. according to claim 1 or 2 described devices, it is characterized in that, be provided with many neck eye wings (31) on described pilot bit (3), between every two described neck eye wings (31), for returning, consider groove (32) to be worth doing;
The nose of described neck eye wing (31) is provided with wear-resistant pad (301), and the same lateral edges of many described neck eye wings (31) is provided with Cutter (302), and described wear-resistant pad (301) partly covers described Cutter (302).
6. device according to claim 5, is characterized in that, each only is disposed with to the upper spacing of described neck eye wing (31) several described Cutters (302).
7. device according to claim 5, is characterized in that, described wear-resistant pad (301) is the hard alloy layer that thickness is 2mm～3mm.
8. device according to claim 5, is characterized in that, the tooth footpath of described wing cutting teeth (102) is less than the tooth footpath of described Cutter (302).
9. a control, with the method for boring reaming hole the pressure of the drill relations of distribution, is characterized in that, the rock proposed according to Teale is than merit expression formula:
E s = W A + 120 π · Ω · W · T A · v - - - ( 1 )
In formula, E sfor rock compares merit; W is the pressure of the drill; A is the sectional area that rock crushing tool cutting stratum generates well; T is moment of torsion; Ω is rotating speed; V is rate of penetration;
Derive the pressure of the drill distribution ratio f wfor:
f w = W r W b = σ r σ b · η b η r · k b k r · A r A b - - - ( 2 )
In formula (2), k rfor reamer acutance, k bfor the drill bit acutance; η bfor drill bit drilling efficiency, η rfor reamer drilling efficiency, σ rfor boring, reamer meets rock stratum compressive strength, σ bfor bit drills is met rock stratum compressive strength, A bfor the neck eye sectional area that the bit cutting stratum generates, A rfor reamer enlarges the annular cross-sectional area formed after the neck eye;
When drill-following reamer (1) and pilot bit (3) distance are closer, be considered as described drill-following reamer (1) and described pilot bit (3) in stratum of the same race, the pressure of the drill distribution ratio f wonly relevant to the cutting power of described drill-following reamer (1) and described pilot bit (3).
10. method according to claim 9, is characterized in that,
S1, adjust wear-resistant pad (301) thickness of described pilot bit (3), controls the maximum depth of cut that described pilot bit (3) often turns and change the cutting power of described pilot bit (3);
S2, change reamer wing (101) the cloth tooth mode of described drill-following reamer (1), makes the cutting power of described reamer wing (101) be better than the cutting power of described pilot bit (3);
By the adjustment in S1 and S2 step, control the pressure of the drill relations of distribution of described drill-following reamer (1) and described pilot bit (3).
CN201210195004.0A 2012-06-13 2012-06-13 Control the device and method of reaming-while-drillibit bit pressure distribution relation Active CN103485723B (en)

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CN108603396A (en) * 2016-01-28 2018-09-28 斯伦贝谢技术有限公司 Stage underreamer wing
CN110984865A (en) * 2019-12-06 2020-04-10 河北菲克森煤矿机械制造有限公司 Rock fracturing drill bit and method for releasing rock stress
CN111322012A (en) * 2020-03-18 2020-06-23 长江大学 Variable-diameter while-drilling reamer and variable-diameter adjusting structure thereof
CN113882809A (en) * 2021-12-06 2022-01-04 山东金锐石油装备有限公司 PDC drill bit with telescopic cutting auxiliary tooth assembly and using method
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CN108603396A (en) * 2016-01-28 2018-09-28 斯伦贝谢技术有限公司 Stage underreamer wing
CN108603396B (en) * 2016-01-28 2020-07-07 斯伦贝谢技术有限公司 Step type under-reaming device blade
US11002080B2 (en) 2016-01-28 2021-05-11 Schlumberger Technology Corporation Staged underreamer cutter block
US11225838B2 (en) 2016-01-28 2022-01-18 Schlumberger Technology Corporation Underreamer cutter block
US11814903B2 (en) 2016-01-28 2023-11-14 Schlumberger Technology Corporation Staged underreamer cutter block
CN110984865A (en) * 2019-12-06 2020-04-10 河北菲克森煤矿机械制造有限公司 Rock fracturing drill bit and method for releasing rock stress
CN111322012A (en) * 2020-03-18 2020-06-23 长江大学 Variable-diameter while-drilling reamer and variable-diameter adjusting structure thereof
CN114151013A (en) * 2021-11-19 2022-03-08 中煤科工集团西安研究院有限公司 Large-diameter hole expanding drill bit while drilling in underground coal mine
CN114151013B (en) * 2021-11-19 2023-08-11 中煤科工集团西安研究院有限公司 Underground large-diameter reaming while drilling bit for coal mine
CN113882809A (en) * 2021-12-06 2022-01-04 山东金锐石油装备有限公司 PDC drill bit with telescopic cutting auxiliary tooth assembly and using method
CN113882809B (en) * 2021-12-06 2022-02-08 山东金锐石油装备有限公司 PDC drill bit with telescopic cutting auxiliary tooth assembly and using method

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