CN205618085U - Anti - ream bit that circulates of gas well gas that wearability is high - Google Patents
Anti - ream bit that circulates of gas well gas that wearability is high Download PDFInfo
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- CN205618085U CN205618085U CN201620439299.5U CN201620439299U CN205618085U CN 205618085 U CN205618085 U CN 205618085U CN 201620439299 U CN201620439299 U CN 201620439299U CN 205618085 U CN205618085 U CN 205618085U
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- cutter
- drill collar
- circular plate
- bearing
- cutter shaft
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Abstract
The utility model provides an anti - ream bit that circulates of gas well gas that wearability is high, include the center pin to the drill collar that is equipped with the return flow line, penetrating about the return flow line, the outside top -down of drill collar is equipped with centralizer, combination formula cutter structure and direction in proper order and digs the structure soon, dig the hydrophthalmia that is equipped with with the return flow line intercommunication soon between the structure in combination formula cutter structure and direction on the drill collar, the barrel that the centralizer set up with the axial the drill collar outside and with the drill collar including the cover, connecting plate fixed connection through three piece at least even settings between barrel inner wall and the drill collar outer wall, barrel outer wall are followed the barrel surface and evenly are equipped with three at least bead strips, and bead strip surface is equipped with the wearing layer, and every upward the length direction of wearing layer is all parallel with the barrel central line, to sum up, this device arranges that the sediment is smooth and easy, to wash the little wearability of medium flow resistance high.
Description
Technical field
The utility model belongs to mining production or technical field of construction, is specifically related to the high gas well gas reacting cycle reaming bit of a kind of wearability.
Background technology
Producing and requirement of engineering for satisfied, improving operating efficiency and economic benefit, major diameter engineering gas well gas clean-out machine technique is gradually used widely in fields such as collieries；But traditional direct circulation reaming bit is less due to water logging, being unfavorable for that bigger sillar timely enters drilling tool internal channel, easily blocking bit port, traditional direct circulation reaming bit area of passage is less, flow resistance at drill bit for the scouring media is relatively big, is unfavorable for setting up reverse circulation system；Additionally
Cutter on drill bit is the part directly contacting with landwaste, rubble, easy to wear and need to change in time, wherein, the quality of cutter arrangement directly influences again cutting effect and the driving speed of 1 rig, the problem that traditional reaming bit cutter in use reflects is: because wearing no resistance, the phenomenon of cutter premature failure easily occur, the unreasonable deslagging of cutter structure has some setbacks；Tool rest abrasion simultaneously is more serious, thus needs the cutter frequently more renewing, and expends a large amount of manpower, financial resources and material resources, causes use cost higher, and therefore, the cutter in the urgent need to developing a kind of super abrasive solves current problems faced.
Utility model content
The utility model, in order to solve weak point of the prior art, provides the gas well gas reacting cycle reaming bit that the wearability that a kind of deslagging is smooth and easy, scouring media flow resistance is little is high.
For solving above-mentioned technical problem, the utility model adopts the following technical scheme that the high gas well gas reacting cycle reaming bit of a kind of wearability, including the central axial drill collar being provided with return flow line, return flow line is penetrating up and down, is sequentially provided with centralizer, combined knife lamps structure from top to bottom and guides rotation digging structure outside drill collar；It is provided with, between combined knife lamps structure and guiding rotation digging structure, the hydrophthalmia connecting with return flow line on drill collar；
Centralizer includes being enclosed within outer and the coaxial setting with drill collar the cylinder of drill collar, it is connected by least three pieces of connecting plates being uniformly arranged are fixing between cylinder inboard wall with drill collar outer wall, cylinder body outer wall is uniformly provided with at least three fin bars along barrel outer surface, fin bar outer surface is provided with wearing layer, and the length direction of every upper wearing layer is all parallel with Barrel alignment；
Combined knife lamps structure includes coaxial the first Circular Plate being sequentially arranged at from top to bottom on drill collar outer wall, second Circular Plate, 3rd Circular Plate and the 4th Circular Plate, first Circular Plate is identical with the second Circular Plate outside dimension, 3rd Circular Plate is identical with the outside dimension of the 4th Circular Plate, second Circular Plate and the 4th Circular Plate outward flange circumferentially direction are uniformly provided with at least three respectively and install slotted eye, install and be equipped with wear-resisting cutter head at slotted eye, the upper end of the wear-resisting cutter head in the second Circular Plate is fixing with the first Circular Plate lower surface to be connected, the upper end of the wear-resisting cutter head in the 4th Circular Plate is fixing with the 3rd Circular Plate lower surface to be connected；
Guide rotation digging structure and include that plate is dug in the rotation of three pieces of guiding, the rotation of three pieces of guiding is dug plate and is evenly arranged along drill collar circumference, the rotation of three pieces of guiding is dug plate the inner and is extend into inside drill collar, three pieces guide rotation and dig plate inner edge interconnection, three pieces guide rotation and dig the connecting line at the inner edge of plate and overlap with drill collar center line, three pieces of upper and lowers guiding the rotary track that plate outer end edges is dug in rotation are respectively cylinder and up big and down small cone, and three pieces guide rotation and dig wearing layer under plate outer end edges surface configuration.
The wear-resisting cutter head being positioned in the second Circular Plate includes resistance to knife-grinding seat and disk cutter, and resistance to knife-grinding seat upper end is fixed on the first Circular Plate lower surface, and disk cutter is located on resistance to knife-grinding seat；Disk cutter includes cutter shaft and cutter hub, cutter shaft two ends are all fixed on resistance to knife-grinding seat bottom by connecting bearing pin, cutter shaft is obliquely installed and the upper end of cutter shaft is more than the distance of cutter shaft lower end and drill collar center line with the distance of drill collar center line, the center line of cutter shaft and the angle of horizontal plane are 10 °-40 °, it is in axial direction sequentially provided with the first rolling bearing from bottom to top on cutter shaft, thrust bearing and the second rolling bearing, cutter shaft respectively with the first rolling bearing, thrust bearing and the second rolling bearing are interference fits, it is provided with bearing chamber in cutter hub, first rolling bearing, the outer ring of thrust bearing and the second rolling bearing coordinates with bearing chamber internal wall transitions；It is provided with the back-up ring for limiting the first rolling bearing position on the downside of bearing chamber in cutter hub, the threaded union (screwed)bonnet (UB having for compressing the second rolling bearing of cutter hub upper end inner ring, cutter shaft two ends are equipped with bearing holder (housing, cover), the bearing holder (housing, cover) of upside is positioned between union (screwed)bonnet (UB and cutter shaft, and the bearing holder (housing, cover) of downside is positioned between cutter hub and cutter shaft；Cutter hub is obliquely installed and cutter hub external form is upper coarse and lower fine conical structure, and cutter hub outer surface is radially provided with cutting tooth, and the outer surface of resistance to knife-grinding seat is provided with groove, is fixedly embedded at the resistance to roll flute protruding from the outer surface of resistance to knife-grinding seat in groove；Cutting tooth and resistance to roll flute are made by composite polycrystal-diamond；Cutter hub outer surface circumference is at least provided with an ash pit.
Resistance to roll flute external form is cylinder type, cutting tooth protrude from cutter hub outer surface be shaped as spherical.
Cutter shaft is provided with oil filler point, the oil filler point connection external world and the first rolling bearing, thrust bearing and the second rolling bearing；Being provided with at the oil-in of oil filler point threaded has hexagon socket head cap screw.
It is provided with the first sealing ring between the bearing holder (housing, cover) of upside and union (screwed)bonnet (UB, be provided with the second sealing ring between the bearing holder (housing, cover) of downside and cutter hub, between each bearing holder (housing, cover) and cutter shaft, be provided with the 3rd sealing ring, between union (screwed)bonnet (UB and cutter shaft, be provided with the 4th sealing ring.
Using technique scheme, the utility model has the advantages that bottom hydrophthalmia and drill collar and all can pass through bigger sillar, thus can largely avoided return flow line and block in import department.Upper wearing layer and lower wearing layer are welding-on alloy, so can extend service life of the present utility model.Guide rotation and dig the effect that plate primarily serves guide digging, guide rotation and dig the radius of gyration less than lower cone palm for the maximum radius of gyration of plate.The utility model arranges the guiding rotation that the radius of gyration increases successively and digs plate, so can fully reduce boring resistance, reduce reaming difficulty, improve reaming efficiency.
By increasing the fixing resistance to roll flute being made up of composite polycrystal-diamond at the outer surface of resistance to knife-grinding seat, considerably increase the wearability of away drill cuttings；It is radially provided with the cutting tooth being made up of composite polycrystal-diamond by cutter hub outer surface, instead of traditional carbide cutting tooth, improve the wearability of cutting tooth, decrease the replacing number of times of away drill cuttings, and then reduce construction cost, improve operating efficiency；
Cutter hub outer surface circumference is at least provided with an ash pit, and the bottom land of ash pit is arc structure, and ash pit is reasonable in design, and the flowing making rock consider to be worth doing is smooth and easy, thus decreases the abrasion to cutter hub for the rock bits, extends the service life of cutter hub；
Cutter shaft is provided with oil filler point, the oil filler point connection external world and the first rolling bearing, thrust bearing and the second rolling bearing, by oil filler point to the first rolling bearing, lubricating oil is injected on thrust bearing and the second rolling bearing, add the first rolling bearing, thrust bearing and the service life of the second rolling bearing, it is provided with the first sealing ring between the bearing holder (housing, cover) of upside and union (screwed)bonnet (UB, it is provided with the second sealing ring between the bearing holder (housing, cover) of downside and cutter hub, it is provided with the 3rd sealing ring between each bearing holder (housing, cover) and cutter shaft, it is provided with the 4th sealing ring between union (screwed)bonnet (UB and cutter shaft, first sealing ring, second sealing ring, 3rd sealing ring and the 4th sealing ring are for sealing the lubricating oil between cutter shaft and cutter hub, prevent lubricating oil from leaking, hexagon socket head cap screw is used for blocking oil filler point；Union (screwed)bonnet (UB and bearing holder (housing, cover) are used to fix the first rolling bearing, thrust bearing and the second rolling bearing, prevent it when construction, move along cutter shaft.
Brief description
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the structural representation of wear-resisting cutter head in the utility model；
Fig. 4 is the sectional view in Fig. 3 at A-A.
Detailed description of the invention
As Figure 1-4, the high gas well gas reacting cycle reaming bit of a kind of wearability of the present utility model, including the central axial drill collar 1 being provided with return flow line 2, return flow line is penetrating about 2, and drill collar 1 is outside to be sequentially provided with centralizer, combined knife lamps structure from top to bottom and guides rotation digging structure；It is provided with, between combined knife lamps structure and guiding rotation digging structure, the hydrophthalmia 3 connecting with return flow line 2 on drill collar 1；
Centralizer includes being enclosed within outer and the coaxial setting with drill collar 1 the cylinder 4 of drill collar 1, it is connected by least three pieces of connecting plates being uniformly arranged 5 are fixing between cylinder 4 inwall with drill collar 1 outer wall, cylinder 4 outer wall is circumferentially uniformly provided with at least three fin bars 6, fin bar 6 outer surface is provided with wearing layer 7, the length direction of every upper wearing layer 7 all with cylinder 4 centerline parallel；
Combined knife lamps structure includes coaxial the first Circular Plate 8 being sequentially arranged at from top to bottom on drill collar 1 outer wall, second Circular Plate 9, 3rd Circular Plate 10 and the 4th Circular Plate 11, first Circular Plate 8 is identical with the second Circular Plate 9 outside dimension, 3rd Circular Plate 10 is identical with the outside dimension of the 4th Circular Plate 11, second Circular Plate 9 and the 4th Circular Plate 11 outward flange are circumferentially uniformly provided with at least three respectively and install slotted eye, install and be equipped with wear-resisting cutter head 100 at slotted eye, the upper end of the wear-resisting cutter head 100 in the second Circular Plate 9 is fixing with the first Circular Plate 8 lower surface to be connected, the upper end of the wear-resisting cutter head 100 in the 4th Circular Plate 11 is fixing with the 3rd Circular Plate 10 lower surface to be connected；First Circular Plate the 8th, the second Circular Plate the 9th, the 3rd Circular Plate 10 and the 4th Circular Plate 11 all use 30mm steel plate to process.
Guide rotation digging structure and include that plate 14 is dug in the rotation of three pieces of guiding, the rotation of three pieces of guiding is dug plate 14 and is evenly arranged along drill collar 1 circumference, the rotation of three pieces of guiding is dug plate 14 the inner and is extend into drill collar 1 inside, three pieces guide rotation and dig plate 14 inner edge interconnection, three pieces guide rotation and dig the connecting line at the inner edge of plate 14 and overlap with drill collar 1 center line, three pieces of upper and lowers guiding the rotary track that plate 14 outer end edges is dug in rotation are respectively cylinder and up big and down small cone, and three pieces guide rotation and dig wearing layer 15 under plate 14 outer end edges surface configuration.
The number of connecting plate 5 and upper wearing layer 7 is six, and a upper wearing layer 7 is all radially corresponding to one piece of connecting plate 5 and arranges.
Drill collar 1 in the middle of the utility model is existing mature technology, and specific configuration repeats no more.
The wear-resisting cutter head 100 being positioned in the second Circular Plate 9 includes resistance to knife-grinding seat 101 and disk cutter, and disk cutter is located on resistance to knife-grinding seat 101；nullDisk cutter includes cutter shaft 102 and cutter hub 103，Cutter shaft 102 two ends are all fixed on resistance to knife-grinding seat 101 bottom by connecting bearing pin 104，Cutter shaft 102 is obliquely installed and the upper end of cutter shaft 102 is more than the distance of cutter shaft 102 lower end and drill collar 1 center line with the distance of drill collar 1 center line，The center line of cutter shaft 102 and the angle of horizontal plane are 10 °-40 °，It is in axial direction sequentially provided with the first rolling bearing 105 from bottom to top on cutter shaft 102、Thrust bearing 106 and the second rolling bearing 107，Cutter shaft 102 respectively with the first rolling bearing 105、Thrust bearing 106 and the second rolling bearing 107 are interference fits，It is provided with bearing chamber in cutter hub 103，First rolling bearing 105、The outer ring of thrust bearing 106 and the second rolling bearing 107 coordinates with bearing chamber internal wall transitions；It is provided with the back-up ring 119 for limiting the first rolling bearing 105 position on the downside of bearing chamber in cutter hub 103；Cutter hub 103 threaded upper ends is connected with the union (screwed)bonnet (UB 108 for compressing the second rolling bearing, cutter shaft 102 two ends are equipped with bearing holder (housing, cover) 109, the bearing holder (housing, cover) 109 of upside is positioned between union (screwed)bonnet (UB 108 and cutter shaft 102, and the bearing holder (housing, cover) 109 of downside is positioned between cutter hub 103 and cutter shaft 102；Cutter hub is obliquely installed, and cutter hub external form is upper coarse and lower fine conical structure, and cutter hub 103 outer surface is radially provided with cutting tooth 110, and resistance to knife-grinding seat 101 outer surface is provided with groove, is fixedly embedded at the resistance to roll flute 111 protruding from resistance to knife-grinding seat 101 outer surface in groove；Cutting tooth 110 and resistance to roll flute 111 are made by composite polycrystal-diamond；Cutter hub 103 outer surface circumference is at least provided with an ash pit 112.
Resistance to roll flute 111 external form is cylindrical, cutting tooth 110 protrude from cutter hub 103 outer surface be shaped as spherical.
Cutter shaft 102 is provided with oil filler point 113, and oil filler point 113 connects extraneous and the first rolling bearing the 105th, thrust bearing 106 and the second rolling bearing 107；Being provided with at the oil-in of oil filler point 113 threaded has hexagon socket head cap screw 114.
It is provided with the first sealing ring 115 between the bearing holder (housing, cover) 109 of upside and union (screwed)bonnet (UB 108, it is provided with the second sealing ring 116 between the bearing holder (housing, cover) 109 of downside and cutter hub 103, it is provided with the 3rd sealing ring 117 between each bearing holder (housing, cover) 109 and cutter shaft 102, between union (screwed)bonnet (UB 108 and cutter shaft 102, be provided with the 4th sealing ring 118.
All can pass through bigger sillar bottom hydrophthalmia 3 and drill collar 1, thus can largely avoided return flow line 2 and block in import department.Upper wearing layer 7 and lower wearing layer 15 are welding-on alloy, so can extend service life of the present utility model.Guiding rotation and digging the effect that plate primarily serves guide digging, the utility model arranges the guiding rotation that the radius of gyration increases successively and digs plate 14, so can fully reduce boring resistance, reduce reaming difficulty, improve reaming efficiency
Combined knife lamps structure, by increasing the fixing resistance to roll flute 111 being made up of composite polycrystal-diamond at resistance to knife-grinding seat 101 outer surface, considerably increases the wearability of wear-resisting cutter head 100；Cutter hub 103 outer surface circumference is at least provided with an ash pit 112, and the bottom land of ash pit 112 is arc structure, and ash pit 112 is reasonable in design, and the flowing making rock consider to be worth doing is smooth and easy, thus decreases the abrasion to cutter hub 103 for the rock bits；nullCutter shaft 102 is provided with oil filler point 113，Oil filler point 113 connects extraneous and the first rolling bearing 105、Thrust bearing 106 and the second rolling bearing 107，By oil filler point 113 to the first rolling bearing 105、Lubricating oil is injected on thrust bearing 106 and the second rolling bearing 107，Add the first rolling bearing 105、Thrust bearing 106 and the service life of the second rolling bearing 107，It is provided with the first sealing ring 115 between the bearing holder (housing, cover) 109 of upside and union (screwed)bonnet (UB 108，It is provided with the second sealing ring 116 between the bearing holder (housing, cover) 109 of downside and cutter hub 103，It is provided with the 3rd sealing ring 117 between each bearing holder (housing, cover) 109 and cutter shaft 102，It is provided with the 4th sealing ring 118 between union (screwed)bonnet (UB 108 and cutter shaft 102，First sealing ring 115、Second sealing ring 116、3rd sealing ring 117 and the 4th sealing ring 118 are for sealing the lubricating oil between cutter shaft 102 and cutter hub 103，Prevent lubricating oil from leaking；Union (screwed)bonnet (UB 108 and bearing holder (housing, cover) 109 are used to fix the first rolling bearing the 105th, thrust bearing 106 and the second rolling bearing 107, prevent it when construction, move along cutter shaft 102.
Shape of the present utility model, material, structure etc. are not made any pro forma restriction by the present embodiment; every any simple modification, equivalent variations and modification made above example according to technical spirit of the present utility model, belongs to the protection domain of technical solutions of the utility model.
Claims (4)
1. the high gas well gas reacting cycle reaming bit of a wearability, it is characterised in that: including the central axial drill collar being provided with return flow line, return flow line is penetrating up and down, is sequentially provided with centralizer, combined knife lamps structure from top to bottom and guides rotation digging structure outside drill collar；It is provided with, between combined knife lamps structure and guiding rotation digging structure, the hydrophthalmia connecting with return flow line on drill collar；
Centralizer includes being enclosed within outer and the coaxial setting with drill collar the cylinder of drill collar, it is connected by least three pieces of connecting plates being uniformly arranged are fixing between cylinder inboard wall with drill collar outer wall, cylinder body outer wall is uniformly provided with at least three fin bars along barrel outer surface, fin bar outer surface is provided with wearing layer, and the length direction of every upper wearing layer is all parallel with Barrel alignment；
Combined knife lamps structure includes coaxial the first Circular Plate being sequentially arranged at from top to bottom on drill collar outer wall, second Circular Plate, 3rd Circular Plate and the 4th Circular Plate, first Circular Plate is identical with the second Circular Plate outside dimension, 3rd Circular Plate is identical with the outside dimension of the 4th Circular Plate, second Circular Plate and the 4th Circular Plate outward flange circumferentially direction are uniformly provided with at least three respectively and install slotted eye, install and be equipped with wear-resisting cutter head at slotted eye, the upper end of the wear-resisting cutter head in the second Circular Plate is fixing with the first Circular Plate lower surface to be connected, the upper end of the wear-resisting cutter head in the 4th Circular Plate is fixing with the 3rd Circular Plate lower surface to be connected；
Guide rotation digging structure and include that plate is dug in the rotation of three pieces of guiding, the rotation of three pieces of guiding is dug plate and is evenly arranged along drill collar circumference, the rotation of three pieces of guiding is dug plate the inner and is extend into inside drill collar, three pieces guide rotation and dig plate inner edge interconnection, three pieces guide rotation and dig the connecting line at the inner edge of plate and overlap with drill collar center line, three pieces of upper and lowers guiding the rotary track that plate outer end edges is dug in rotation are respectively cylinder and up big and down small cone, and three pieces guide rotation and dig wearing layer under plate outer end edges surface configuration；
The wear-resisting cutter head being positioned in the second Circular Plate includes resistance to knife-grinding seat and disk cutter, and resistance to knife-grinding seat upper end is fixed on the first Circular Plate lower surface, and disk cutter is located on resistance to knife-grinding seat；Disk cutter includes cutter shaft and cutter hub, cutter shaft two ends are all fixed on resistance to knife-grinding seat bottom by connecting bearing pin, cutter shaft is obliquely installed and the upper end of cutter shaft is more than the distance of cutter shaft lower end and drill collar center line with the distance of drill collar center line, the center line of cutter shaft and the angle of horizontal plane are 10 °-40 °, it is in axial direction sequentially provided with the first rolling bearing from bottom to top on cutter shaft, thrust bearing and the second rolling bearing, cutter shaft respectively with the first rolling bearing, thrust bearing and the second rolling bearing are interference fits, it is provided with bearing chamber in cutter hub, first rolling bearing, the outer ring of thrust bearing and the second rolling bearing coordinates with bearing chamber internal wall transitions；It is provided with the back-up ring for limiting the first rolling bearing position on the downside of bearing chamber in cutter hub, the threaded union (screwed)bonnet (UB having for compressing the second rolling bearing of cutter hub upper end inner ring, cutter shaft two ends are equipped with bearing holder (housing, cover), the bearing holder (housing, cover) of upside is positioned between union (screwed)bonnet (UB and cutter shaft, and the bearing holder (housing, cover) of downside is positioned between cutter hub and cutter shaft；Cutter hub is obliquely installed and cutter hub external form is upper coarse and lower fine conical structure, and cutter hub outer surface is radially provided with cutting tooth, and the outer surface of resistance to knife-grinding seat is provided with groove, is fixedly embedded at the resistance to roll flute protruding from the outer surface of resistance to knife-grinding seat in groove；Cutting tooth and resistance to roll flute are made by composite polycrystal-diamond；Cutter hub outer surface circumference is at least provided with an ash pit.
2. the high gas well gas reacting cycle reaming bit of a kind of wearability according to claim 1, it is characterised in that: resistance to roll flute external form is cylinder type, cutting tooth protrude from cutter hub outer surface be shaped as spherical.
3. the high gas well gas reacting cycle reaming bit of a kind of wearability according to claim 2, it is characterised in that: cutter shaft is provided with oil filler point, and oil filler point connection is extraneous with the first rolling bearing, thrust bearing and the second rolling bearing；Being provided with at the oil-in of oil filler point threaded has hexagon socket head cap screw.
4. the high gas well gas reacting cycle reaming bit of a kind of wearability according to claim 3, it is characterized in that: between the bearing holder (housing, cover) of upside and union (screwed)bonnet (UB, be provided with the first sealing ring, it is provided with the second sealing ring between the bearing holder (housing, cover) of downside and cutter hub, it is provided with the 3rd sealing ring between each bearing holder (housing, cover) and cutter shaft, between union (screwed)bonnet (UB and cutter shaft, be provided with the 4th sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620439299.5U CN205618085U (en) | 2016-05-16 | 2016-05-16 | Anti - ream bit that circulates of gas well gas that wearability is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620439299.5U CN205618085U (en) | 2016-05-16 | 2016-05-16 | Anti - ream bit that circulates of gas well gas that wearability is high |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205618085U true CN205618085U (en) | 2016-10-05 |
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ID=57024050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620439299.5U Expired - Fee Related CN205618085U (en) | 2016-05-16 | 2016-05-16 | Anti - ream bit that circulates of gas well gas that wearability is high |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205618085U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740679A (en) * | 2017-10-06 | 2018-02-27 | 西南石油大学 | A kind of coiled tubing drilling combination sealing drill bit |
| RU2655505C1 (en) * | 2017-09-01 | 2018-05-28 | федеральное государственное бюджетное образовательное учреждение высшего образования "Кузбасский государственный технический университет имени Т.Ф. Горбачева" (КузГТУ) | Drilling tools |
-
2016
- 2016-05-16 CN CN201620439299.5U patent/CN205618085U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2655505C1 (en) * | 2017-09-01 | 2018-05-28 | федеральное государственное бюджетное образовательное учреждение высшего образования "Кузбасский государственный технический университет имени Т.Ф. Горбачева" (КузГТУ) | Drilling tools |
| CN107740679A (en) * | 2017-10-06 | 2018-02-27 | 西南石油大学 | A kind of coiled tubing drilling combination sealing drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20170516 |