CN105804662A - Double-bearing simply supported beam type rock breaking hob and mixed PDC drill bit thereof - Google Patents
Double-bearing simply supported beam type rock breaking hob and mixed PDC drill bit thereof Download PDFInfo
- Publication number
- CN105804662A CN105804662A CN201610207843.8A CN201610207843A CN105804662A CN 105804662 A CN105804662 A CN 105804662A CN 201610207843 A CN201610207843 A CN 201610207843A CN 105804662 A CN105804662 A CN 105804662A
- Authority
- CN
- China
- Prior art keywords
- hob
- drill bit
- rock
- cutting rock
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 113
- 238000005520 cutting process Methods 0.000 claims abstract description 99
- 238000010079 rubber tapping Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000004519 grease Substances 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 17
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000007789 sealing Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 241000736919 Pelodiscus sinensis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
Abstract
The invention relates to a double-bearing simply supported beam type rock breaking hob and a mixed PDC drill bit thereof.The rock breaking hob comprises a spherical body, a through hole for a supporting shaft to penetrate through is formed in the center of the body, multiple rock breaking elements are arranged on the outer edge of the body, and the two ends of the supporting shaft are supported at the two ends of the through hole of the rock breaking hob through bearings respectively and penetrate out; the mixed PDC drill bit comprises a drill bit body, and multiple pairs of blades are distributed at the front end of the drill bit body, and rock breaking hobs are arranged between the blades or at the crown portions of the blades.Therefore, the supporting shaft has the function of a simply supported beam during work and bears shear force and torque of the rock breaking hobs during work, in this way, defects in the prior art are overcome, the advantage of breaking rock through fracturing of the rock breaking hob and the advantage of breaking rock through cutting of the PDC drill bit are effectively combined, and rock is fractured and cut at the same time, so that the drill bit has adaptability to diversity of a stratum in exploiting operation, drilling speed and efficiency are improved, and the service life of the drill bit is effectively prolonged.
Description
Technical field
The present invention relates to the technical field of drilling prospection instrument, particularly relate to a kind of duplex bearing freely-supported beam type Hob for cutting rock and hybrid PDC drill bit thereof, its structure carries out detritus in conjunction with Hob for cutting rock, utilize PDC drill bit composite sheet rotary cutting principle, the advantage of comprehensive two kinds of drill bits, reach complementary raising, formed a kind of new, it is easy to the hybrid bit of manufacture.
Background technology
PDC drill bit is commonly used to geological prospecting, coalfield drilling, the fields such as oil exploration, in recent years, during PDC drill bit uses, accident rate is low, rate of penetration is fast, its annual drill footage quantity rises always, use very extensive, but time in drilling more to some Special complex stratum, such as interlayer gravel, rubber stratum, easily there is not shock resistance in drilling process in PDC composite sheet, or stratum can not effective wedging, occur that composite sheet is damaged in advance, cause bit wear, life-span terminates in advance, can not effectively keep drill footage speed, thus having to re-start trip-out, the drill bit more renewed, or use rifler to carry out operation, increase drilling period and cost.
The applicant of the present invention utilizes duplex bearing freely-supported beam type Hob for cutting rock and is incorporated into hybrid PDC drill bit, Hob for cutting rock two ends all use axle and drill bit to be welded and fixed, thus playing the effect of simply supported beam, its bearing capacity is much stronger than the Cantilever Beams structure of rifler, also can undertake bigger shearing and moment of torsion simultaneously, and Hob for cutting rock is internal adopts dual bearing structure, effectively share the pressure of the drill load of simply supported beam, making the more effective incision stratum of Hob for cutting rock play detritus effect, safety coefficient is also improved.
For this, the designer of the present invention is because drawbacks described above, and by concentrating on studies and designing, comprehensive experience and the achievement being engaged in related industry for a long time for many years, research design goes out a kind of duplex bearing freely-supported beam type Hob for cutting rock and hybrid PDC drill bit thereof, to overcome drawbacks described above.
Summary of the invention
It is an object of the invention to provide a kind of duplex bearing freely-supported beam type Hob for cutting rock and hybrid PDC drill bit thereof, it overcomes PDC diamond compact bit in drillng operation, when boring more complicated interlayer stratum, gravel stratum, rubber stratum etc., or during positioning operation, damaging in advance occurs in PDC composite sheet life-span deficiency, also or cannot effective wedging lithostratigraphy, occur that in operation, Trionyx sinensis Wiegmann bores phenomenon of jumping, PDC drill bit does not arrive the awkward state that desirable drilling depth effect has to scrap in advance, thus in conjunction with the Cutting Rock advantage of Hob for cutting rock pressure break detritus advantage Yu PDC drill bit, rock is crushed simultaneously, cutting, thus reaching the drill bit various adaptability to stratum in mining operations, also improve bit speed and efficiency simultaneously, effectively extend bit life.
For solving the problems referred to above, the invention discloses a kind of duplex bearing freely-supported beam type Hob for cutting rock, it is characterized in that: the body that described Hob for cutting rock comprises spherical shape, the center of described body is provided with mean for supporting the through hole that axle runs through, outer rim is provided with multiple broken rock element, and the two ends of described support axle are stretched out respectively through bearings through hole two ends in Hob for cutting rock running through, thus, described support axle operationally undertakes simply supported beam function, bears shearing and the moment of torsion of Hob for cutting rock during work.
Wherein: the upper end of described support axle is stretched out after sequentially passing through end thrust bearings, end seal element and locking element, the lower end of described support axle is sequentially installed with load-bearing thrust bearing and potted component.
Wherein: between described support axle and through hole, there is gap, to be provided with the bearing grease being easy to rotate, oil leak hole and pressure release oil sac can in described support axle, be also provided with.
Wherein: described pressure release oil sac comprises oil sac body, the centre of oil sac body is provided with the not through interstitial hole to top, the upper end of described interstitial hole is provided with longitudinally through the oil outlet to outside, the end of described interstitial hole is provided with type of tamper evidence, inside is provided with extrusion, is provided with extrusion can be promoted to carry out seesawing to realize storage and the buffer spring of extruding between described type of tamper evidence and extrusion.
A kind of hybrid PDC drill bit, including drill body, it is characterised in that: the front end distribution of described drill body has multipair wing, between wing and wing or the bizet location arrangements of wing have Hob for cutting rock as above.
Wherein: the center of described drill body is longitudinally provided with main water hole, and top is provided with multiple tapping hole, and described main water hole connects with each tapping hole.
Wherein: described wing is provided with multiple cutting element, described cutting element is arranged to bit gauge protection from the heart portion of wing always.
Wherein: having angle between the axis and the axis of drill body that support axle of described Hob for cutting rock is β, described 60 ° > β > 30 °.
Wherein: having an offset distance between the axis and the axis of drill body that support axle of described Hob for cutting rock is δ, and described δ is more than zero but less than or equal to 25mm.
By said structure it can be seen that the duplex bearing freely-supported beam type Hob for cutting rock of the present invention and hybrid PDC drill bit thereof have the effect that
1, Hob for cutting rock uses duplex bearing simple beam structure, is greatly improved the uniformity of the Hob for cutting rock life-span when rock crushing and stress, also improves the safety of drilling well mining operations simultaneously, avoids bearing failure, the accident in Hob for cutting rock landing shaft bottom greatly.
2, operationally, Hob for cutting rock is subject to the counter-force of rock and promotes Hob for cutting rock rotation, rock is constantly ground crushing by the carbide button inlayed on Hob for cutting rock in rotation process, in the rotary course of drill bit, rock is rotated cutting by the cutting element above drill bit wing simultaneously, make the rock plastic failure in advance of densification, can also avoid when bit operation is unbalanced, composite sheet is subject to impact and lost efficacy in advance, drilling effect is desirably cut thus obtaining, meet drilling field PDC drill bit and deal with multiformity, demand during containing stratum operations such as gravels.
3, PDC drill bit rotary cutting rock and the principle of Hob for cutting rock rolling rock crushing are combined, drilling well can effectively extend bit life, and play Hob for cutting rock cutting, the advantage of PDC drill bit cutting, make drill bit can effectively adapt to its change when boring more bad ground, improve drilling efficiency and extend bit life.
The detailed content of the present invention can be obtained by explanation described later and institute's accompanying drawing.
Accompanying drawing explanation
Fig. 1 shows the phantom of the hybrid PDC drill bit in the present invention with duplex bearing freely-supported beam type Hob for cutting rock.
Fig. 2 shows the accompanying drawing that duplex bearing freely-supported beam type Hob for cutting rock carries out in Fig. 1 section view.
Fig. 3 shows the top view of Fig. 1.
Fig. 4 shows the exploded view of duplex bearing freely-supported beam type Hob for cutting rock of the present invention.
Fig. 5 shows the assembled sectional view of duplex bearing freely-supported beam type Hob for cutting rock of the present invention.
Fig. 6 shows the schematic diagram of pressure release oil sac of the present invention.
Fig. 7 this enforcement Hob for cutting rock and PDC drill bit body assembling schematic diagram.
Fig. 8 shows the top view of the hybrid PDC drill bit not installing duplex bearing freely-supported beam type Hob for cutting rock in the present invention.
Fig. 9 shows that in the present invention, hybrid PDC drill bit installs the schematic diagram of duplex bearing freely-supported beam type Hob for cutting rock.
Figure 10 shows that another embodiment does not install the top view of the hybrid PDC drill bit of duplex bearing freely-supported beam type Hob for cutting rock.
Figure 11 shows the top view of another embodiment.
Accompanying drawing labelling of the present invention is as follows:
Drill body 1, upper mounting seat 101, lower mounting seat 102, wing 2, cutting element 3, tapping hole 4, flap nozzle 5, Hob for cutting rock 6, broken rock element 7, support axle 8, locking element 9, end seal element 10, end thrust bearings 11, bearing grease 12, load-bearing thrust bearing 13, potted component 14, pressure release oil sac 15, oil sac body 151, interstitial hole 152, oil outlet 153, type of tamper evidence 154, squeeze sealing member 155, buffer spring 156, positioning convex 157, oil leak hole 16, electric welding layer 17, connect screw thread 18, main water hole 19, breaker slot 20, drill bit strengthens gauge pad 21.
Detailed description of the invention
Referring to Fig. 1 to Fig. 3, it is shown that the schematic diagram of a kind of embodiment of hybrid PDC drill bit in the present invention.
nullDescribed hybrid PDC drill bit includes substantially cylindrical drill body 1，The center of described drill body 1 is longitudinally provided with main water hole 19，Bottom outer rim is provided with connection screw thread 18，It is connected with drilling rod for drill bit and transmits moment of torsion，Middle part is provided with breaker slot 20，It is easy to operation，Top is provided with multiple tapping hole 4，Described main water hole 19 connects with each tapping hole 4，In each tapping hole 4, flap nozzle 5 is installed，Described activity is touched mouth 5 and is passed through sealing ring，It is threaded connection and is positioned in tapping hole 4，Drilling fluid passes through water hole by the bottom of main water hole 19 and tapping hole 4 access wall，By circulating，The landwaste cut is taken out of ground，The front end of drill body 1 can be distributed multipair wing，Described wing can comprise the operator wing and/or secondary wing，The quantity of described wing can be 2 to 15 pairs，Between wing and wing，Or the bizet location arrangements of wing has Hob for cutting rock 6.
Thus, described Hob for cutting rock 6 can be arranged on drill body 1 between the wing 2 arranged by weld layer 17, it is also possible to is arranged on wing 2.
nullIn embodiment shown in the figure，The upper end of drill body 1 is provided with two pairs of wings 2 being distributed respectively along the axle center of drill body 1，When arrange two to wing 2，Wing 2 can be the rimmer knife wing，The bearing installing Hob for cutting rock 6 can be provided with between two rimmer knife wings 2，Referring also to Fig. 7 and Fig. 8，Bearing can comprise mounting seat 101、Lower mounting seat 102 and accommodation portion between the two，The two ends of described Hob for cutting rock 6 are fixedly installed in mounting seat 101 and lower mounting seat 102 respectively，The size in accommodation portion is available for Hob for cutting rock 6 and inserts and carry out the rotation that can expect，The method that fixed form can be passed through to cool down electric welding，Namely two ends are as a whole with drill body 1 by electric welding layer 17 welding，Certainly，Or pin with bolts also by end and drill body 1 is riveting the mode connect and makes one，To meet job demand，This bolt connects or pin is riveting the mode connect and substituted for the connected mode of electric welding layer 17，Such structure is beneficial to drill bit cutter bearing after entering well use and rocks or under PDC composite sheet abrasion condition，After drill bit is repaired, secondary uses.
Wherein, described wing 2 is provided with multiple cutting element 3, described cutting element 3 uses PDC composite sheet in the present embodiment, also can require to use diamond gathering impregnated tooth or composite teeth to substitute PDC composite sheet according to stratum on wing 2, described cutting element 3 is arranged to bit gauge protection from the heart portion of wing always always, namely covers at the bottom of complete penetration of well.
Wherein, the outer rim of described lower mounting seat 102 is provided with multiple drill bit and strengthens gauge pad 21, and it can be the hard alloy pad in soldering or composite teeth that described drill bit strengthens gauge pad 21, to be effectively improved quality and the bit life of well.
Referring to Fig. 4-5, show the duplex bearing freely-supported beam type Hob for cutting rock of the present invention, described Hob for cutting rock 6 comprises the body of spherical shape, or with groove rotating body, the center of described body is provided with mean for supporting the through hole that axle 8 runs through, outer rim is provided with multiple broken rock element 7, the two ends of described support axle 8 are stretched out respectively through bearings through hole two ends in Hob for cutting rock 6 running through, the bearing of drill body 1 it is fixed on thereby through support axle 8, thus, described support axle 8 operationally undertakes simply supported beam function, bears shearing and the moment of torsion of Hob for cutting rock 6 during work.
In embodiment shown in the figure, the upper end of described support axle 8 is stretched out after sequentially passing through end thrust bearings 11, end seal element 10 and locking element 9, the lower end of described support axle 8 is sequentially installed with load-bearing thrust bearing 13 and potted component 14, thus, support the two ends of axle 8 respectively by bearings, the two ends of this support axle 8 are individually fixed in drill body 1, and body can rotate by relative support axle 8, realize the supporting role of simply supported beam thereby through support axle 8.
nullWherein，Between described support axle 8 and through hole, there is gap，To be provided with the bearing grease 12 being easy to rotate，Oil leak hole 16 and pressure release oil sac 15 also can be provided with in described support axle 8，Wherein，Described oil leak hole 16 can connect with above-mentioned gap with support axle 8 lower end outside，Described pressure release oil sac 15 is arranged in oil leak hole 16，Referring to Fig. 6，Described pressure release oil sac 15 can comprise oil sac body 151，The centre of described oil sac body 151 is provided with the not through interstitial hole 152 to top，The upper end of described interstitial hole 152 is provided with longitudinally through the oil outlet 153 to outside，The end of described interstitial hole 152 is dismountable is provided with type of tamper evidence 154，Inside is provided with squeeze sealing member 155，It is provided with between described type of tamper evidence 154 and squeeze sealing member 155 and squeeze sealing member 155 can be promoted to carry out seesawing to realize storage and the one-way sealing spring 156 of release，Described type of tamper evidence 154 can be provided with the unidirectional blocking ball 157 connecting one-way sealing spring 156 one end.
Thus, described pressure release oil sac 15 is set to check configuration, namely in Hob for cutting rock rotates, temperature rising causes that bearing grease 12 expands, when internal oil pressure is too high, unnecessary bearing grease 12 enters pressure release oil sac 15, reach check valve effect, and outside mud is without sealing in inside support axle, it is to avoid the lost of life of bearing or lost efficacy in advance.
Referring to Fig. 7 and 8, it is shown that the present invention installs the schematic diagram of Hob for cutting rock, having angle between the axis and the axis of drill body 1 that support axle of the Hob for cutting rock 6 assembled is β, described 60 ° > β > 30 °, it is preferred to 36 °.And there is also an offset distance between the two, namely the distance δ (referring also to Fig. 3 and Figure 10) that the axle center of Hob for cutting rock is certain with the axis deviation of drill body 1, described δ is more than zero but less than or equal to 25mm, it is preferably 6mm, this eccentric distance is beneficial to drill bit when rotated, Hob for cutting rock more effective rotation under rock counter-force effect.
Verify from actual result, the fixing Hob for cutting rock of simple beam structure adopting this kind of two ends fixing is better than one end to be fixed, the simple beam structure of encorbelmenting that one end supports, and more excellent then one end is fixed simultaneously, the cantilevered structure encorbelmented one end in heart portion, suffered by it 1/5th of shearing deficiency Cantilever Beams structure.
Referring to Figure 10 and 11, in another embodiment, described drill body 1 can be provided with three pairs of totally 6 wings 2, wherein two pairs is the rimmer knife wing, is for a pair the short sword wing, is provided with the bearing installing Hob for cutting rock 6 wherein on two rimmer knife wings, when bit operation, rock breaks by wing 2 in heart portion, and drill bit shoulder cuts, by Hob for cutting rock detritus and wing, the cutting way breaking rock and completes the plastic failure of rock, reaches the purpose that drill bit creeps into.
Wherein, the locking element 9 of described Hob for cutting rock 6 can be locking nut, after other elements have assembled, realizes self-locking by locking nut with the screw thread supported on axle 8, completes to support the secure fit of axle 8.
Wherein, the locking element 9 of described Hob for cutting rock 6 is jump ring retaining mechanism, after other elements have assembled, is positioned by jump ring, completes to support the secure fit of axle 8.
Wherein, the surface of described Hob for cutting rock 6 can be done hardening erosion resistance and be processed, can also surfacing wearing layer, it is inlayed or the detritus element 7 of soldering can be the anti-wear components such as hard-metal insert, composite teeth, impregnated with diamond tooth, and Hob for cutting rock 6 and broken rock element 7 can be made to be combined as a whole by soldering or method for embedding.
Wherein, described hybrid PDC drill bit can be steel body type and matrix-type PDC drill bit.
The present invention is in drilling well during fractured rock, the supernatural power of rock promotes Hob for cutting rock to pivot, in rotary course, rock is played crushing by Hob for cutting rock, and spreading crushes, the effect loosened, the rotation of drill bit simultaneously, the rock that Hob for cutting rock is destroyed by cutting element on drill bit wing in advance carries out plough cutting, has so given full play to Hob for cutting rock and drill bit advantage, plays to combine fully playing effect.
The present invention uses duplex bearing, beam simply support at each end structure Hob for cutting rock carries out assembling and on drill bit, can effectively improve stability and the safety of Hob for cutting rock, even if bearing damage, Hob for cutting rock is also unlikely to lose efficacy or fell into shaft bottom at once to cause security incident.
The present invention is more beneficial for being applicable to complicated stratum, such as sandwich stratum, gravel stratum, in use impact failure in advance, can be alleviated in bit operation by Hob for cutting rock and be subject to moment impact, improve drilling efficiency simultaneously, the scope of application being PDC drill bit is wider, efficiency improves, and the life-span increases, and meets the needs of drilling field development.
The bearing supporting axle in the present invention have employed thrust bearing, effectively shares load and moment of flexure, shearing that Hob for cutting rock bears.
The present invention installs a pressure release oil sac in relief hole, when Hob for cutting rock internal oil pressure is bigger, unnecessary oil can be drained, avoiding bearing locked, unique pressure compensator of pressure release oil sac can effectively regulate the oil pressure in Hob for cutting rock body, the rising of drill bit temperature at work, oil pressure increases, effectively being regulated, be more beneficial for extending the service life of bearing and sealing system, in hobboing cutter work, not revolvable situation occurs.Axle front end has also processed bearing fit mechanism and locking device.
The drill body of the present invention, carrying out after surface carries out intensive treatment, according to PDC composite sheet in technological requirement soldering, after cleaning to be cooled, process shaft datum clamp face, the Hob for cutting rock the assembled process by electric welding, make Hob for cutting rock and PDC drill bit assembly welding, can adopting recycled water cooling process during assembly welding, it is ensured that potted component in Hob for cutting rock, bearing element etc. will not produce heat effect or thermal failure damages.
It is readily apparent that above description and record are only illustrate rather than in order to limit the disclosure, application or use.Although describing in an embodiment and being described in the drawings embodiment, but the present invention be not intended to by accompanying drawing example and be described as in an embodiment it is now recognized that optimal mode to implement the specific examples of the teachings of the present invention, the scope of the present invention will include any embodiment falling into description and appended claims above.
Claims (9)
1. a duplex bearing freely-supported beam type Hob for cutting rock, it is characterized in that: the body body that described Hob for cutting rock comprises spherical shape, the center of described body is provided with mean for supporting the through hole that axle runs through, outer rim is provided with multiple broken rock element, the two ends of described support axle are stretched out respectively through bearings through hole two ends in Hob for cutting rock running through, thus, described support axle operationally undertakes simply supported beam function, bears shearing and the moment of torsion of Hob for cutting rock during work.
2. duplex bearing freely-supported beam type Hob for cutting rock as claimed in claim 1, it is characterized in that: the upper end of described support axle is stretched out after sequentially passing through end thrust bearings, end seal element and locking element, the lower end of described support axle is sequentially installed with load-bearing thrust bearing and potted component.
3. duplex bearing freely-supported beam type Hob for cutting rock as claimed in claim 1, it is characterised in that: between described support axle and through hole, there is gap, to be provided with the bearing grease being easy to rotate, in described support axle, also can be provided with oil leak hole and pressure release oil sac.
4. duplex bearing freely-supported beam type Hob for cutting rock as claimed in claim 1, it is characterized in that: described pressure release oil sac comprises oil sac body, the centre of oil sac body is provided with the not through interstitial hole to top, the upper end of described interstitial hole is provided with longitudinally through the oil outlet to outside, the end of described interstitial hole is provided with type of tamper evidence, inside is provided with extrusion, it is provided with between described type of tamper evidence and extrusion and extrusion can be promoted to carry out seesawing to realize storage and the buffer spring of extruding, pressure release oil sac when extrusion is squeezed, also can be made to form a check valve switch.
5. a hybrid PDC drill bit, including drill body, it is characterised in that: the distribution of the front end of described drill body has multipair wing, between wing and wing or the bizet location arrangements of wing just like the Hob for cutting rock described in claim 1-4.
6. hybrid PDC drill bit as claimed in claim 5, it is characterised in that: the center of described drill body is longitudinally provided with main water hole, and top is provided with multiple tapping hole, and described main water hole connects with each tapping hole.
7. hybrid PDC drill bit as claimed in claim 5, it is characterised in that: described wing is provided with multiple cutting element, and described cutting element is arranged to bit gauge protection from the heart portion of wing always.
8. hybrid PDC drill bit as claimed in claim 5, it is characterised in that: having angle between the axis and the axis of drill body that support axle of described Hob for cutting rock is β, described 60 ° > β > 30 °.
9. hybrid PDC drill bit as claimed in claim 5, it is characterised in that: having an offset distance between the axis and the axis of drill body that support axle of described Hob for cutting rock is δ, and described δ is more than zero but less than or equal to 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207843.8A CN105804662B (en) | 2016-04-05 | 2016-04-05 | Duplex bearing freely-supported beam type Hob for cutting rock and its hybrid PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610207843.8A CN105804662B (en) | 2016-04-05 | 2016-04-05 | Duplex bearing freely-supported beam type Hob for cutting rock and its hybrid PDC drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105804662A true CN105804662A (en) | 2016-07-27 |
| CN105804662B CN105804662B (en) | 2017-12-29 |
Family
ID=56459543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610207843.8A Active CN105804662B (en) | 2016-04-05 | 2016-04-05 | Duplex bearing freely-supported beam type Hob for cutting rock and its hybrid PDC drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105804662B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625789A (en) * | 2018-05-22 | 2018-10-09 | 西南石油大学 | The composite drill bit of Split teeth wheel and PDC |
| CN111502551A (en) * | 2020-04-20 | 2020-08-07 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN112145086A (en) * | 2020-09-28 | 2020-12-29 | 沧州格锐特钻头有限公司 | Drill bit with auxiliary drilling function |
| 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 |
| CN114541969A (en) * | 2022-04-26 | 2022-05-27 | 中建八局西南建设工程有限公司 | Percussion bit for rock stratum drilling |
| CN115788311A (en) * | 2023-01-09 | 2023-03-14 | 胜利油田万和石油工程技术有限责任公司 | Hybrid drill bit with enhanced core cutting function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR624923A (en) * | 1926-09-21 | 1927-07-29 | Improvements to probes for drilling wells | |
| US1734760A (en) * | 1927-12-17 | 1929-11-05 | Reed Roller Bit Co | Roller bit |
| US2038408A (en) * | 1935-02-18 | 1936-04-21 | Hughes Tool Co | Cross roller bit |
| US3389760A (en) * | 1966-09-01 | 1968-06-25 | Hughes Tool Co | Rolling cutters for rock formations mounted on simple beam bearings |
| US5839523A (en) * | 1995-02-14 | 1998-11-24 | Sandvik Ab | Methods and apparatus for lubricating a rotary cutter |
| CN103080458A (en) * | 2010-06-29 | 2013-05-01 | 贝克休斯公司 | Drill bits with anti-tracking features |
-
2016
- 2016-04-05 CN CN201610207843.8A patent/CN105804662B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR624923A (en) * | 1926-09-21 | 1927-07-29 | Improvements to probes for drilling wells | |
| US1734760A (en) * | 1927-12-17 | 1929-11-05 | Reed Roller Bit Co | Roller bit |
| US2038408A (en) * | 1935-02-18 | 1936-04-21 | Hughes Tool Co | Cross roller bit |
| US3389760A (en) * | 1966-09-01 | 1968-06-25 | Hughes Tool Co | Rolling cutters for rock formations mounted on simple beam bearings |
| US5839523A (en) * | 1995-02-14 | 1998-11-24 | Sandvik Ab | Methods and apparatus for lubricating a rotary cutter |
| CN103080458A (en) * | 2010-06-29 | 2013-05-01 | 贝克休斯公司 | Drill bits with anti-tracking features |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625789A (en) * | 2018-05-22 | 2018-10-09 | 西南石油大学 | The composite drill bit of Split teeth wheel and PDC |
| CN108625789B (en) * | 2018-05-22 | 2023-06-09 | 西南石油大学 | Composite drill bit of split roller cone and PDC |
| CN111502551A (en) * | 2020-04-20 | 2020-08-07 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN111502551B (en) * | 2020-04-20 | 2021-07-30 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN112145086A (en) * | 2020-09-28 | 2020-12-29 | 沧州格锐特钻头有限公司 | Drill bit with auxiliary drilling function |
| CN112145086B (en) * | 2020-09-28 | 2023-02-03 | 沧州格锐特钻头有限公司 | Drill bit with auxiliary drilling function |
| 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 |
| CN114541969A (en) * | 2022-04-26 | 2022-05-27 | 中建八局西南建设工程有限公司 | Percussion bit for rock stratum drilling |
| CN115788311A (en) * | 2023-01-09 | 2023-03-14 | 胜利油田万和石油工程技术有限责任公司 | Hybrid drill bit with enhanced core cutting function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105804662B (en) | 2017-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105804662A (en) | Double-bearing simply supported beam type rock breaking hob and mixed PDC drill bit thereof | |
| US7624825B2 (en) | Drill bit and cutter element having aggressive leading side | |
| CN205895148U (en) | Roll and protect footpath PDC drill bit | |
| CN106437525B (en) | A kind of composite drill bit suitable for bad ground | |
| CN102536124B (en) | Single-roller bit with PDC (polycrystalline diamond compact) composite plates | |
| RU2769361C2 (en) | Cutting tool with pre-formed segments with hard-facing | |
| CN201588553U (en) | Multifunctional compound drill bit | |
| US20070078632A1 (en) | Stress balanced cutting structure | |
| CN206769817U (en) | A kind of circular groove type diamond bit | |
| US10961784B2 (en) | Rotating cutter single cone bit | |
| CN105781426A (en) | Long-service-life drill bit with self-repairing capacity | |
| US10570665B2 (en) | Drill bit | |
| US20150233187A1 (en) | Frac plug mill bit | |
| WO2013029347A1 (en) | Composite bit with rotary cut rock-breaking function | |
| CN204941355U (en) | Reaming type Mixed drilling bit | |
| CN108222844A (en) | Combined cut PDC drill bit with spin driving toothing | |
| CA2522019C (en) | Nutating single cone drill bit | |
| CN103939022A (en) | Combined drill bit combining PDC drill bit and roller bit for joint rock breaking | |
| CN208137861U (en) | A kind of diamond bit with flexible cutting structure | |
| CN110273650A (en) | A kind of diamond bit with flexible cutting structure | |
| US7025155B1 (en) | Rock bit with channel structure for retaining cutter segments | |
| CN104364460A (en) | Gage cutter protection for drilling bits | |
| CN205823175U (en) | There is the PDC drill bit of anti-torsion impact | |
| CN207944889U (en) | Combined cut PDC drill bit with spin driving toothing | |
| CN205743718U (en) | A kind of coring PDC bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Double bearing simply supported beam rock breaking roller cutter and its hybrid PDC drill bit Effective date of registration: 20231113 Granted publication date: 20171229 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN EASTAR TOOL Co.,Ltd. Registration number: Y2023980065414 |