CN202970474U - Transmission shaft mechanism appropriate for hole opener - Google Patents
Transmission shaft mechanism appropriate for hole opener Download PDFInfo
- Publication number
- CN202970474U CN202970474U CN 201220648147 CN201220648147U CN202970474U CN 202970474 U CN202970474 U CN 202970474U CN 201220648147 CN201220648147 CN 201220648147 CN 201220648147 U CN201220648147 U CN 201220648147U CN 202970474 U CN202970474 U CN 202970474U
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- wing
- transmission shaft
- urceolus
- reamer
- fixed axis
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Abstract
The utility model discloses a transmission shaft mechanism appropriate for a hole opener. The transmission shaft mechanism appropriate for the hole opener comprises a transmission shaft and a fixed shaft fixedly connected with the transmission shaft. An inner cavity of the transmission shaft is communicated with an inner cavity of the fixed shaft. An expander driving knife blades of the hole opener to expand outwards is placed on the fixed shaft. When moving downwards, the transmission shaft mechanism appropriate for the hole opener can be completely matched with the knife blades under the action of pressure to effectively push the knife blade open, ensure that the diameter of the hole opener becomes big, and achieve the purpose of expanding well bores.
Description
Technical field
The utility model relates to a kind of underreamer instrument of drilling well, just relates to specifically a kind of driving shaft mechanism that is applicable to reamer, is used for the oil and gas well drilling technology, belongs to the design and manufacturing technology field of downhole tool.
Background technology
In the process of oil/gas drilling operation, in order to be lowered to the convenience of sleeve pipe, perhaps when the brill chance was easy to the stratum of undergauge, the well that is drilled to usually had undergauge in various degree, in this case, just well need to be expanded as the larger well of diameter.Towards deep-well, ultradeep well, and the field such as Well-drilling shifts along with oil/gas drilling, and the problem that drilling well faces is also come more.The reaming hole technology also at development, not only can be used as the instrument of simple expansion well as a kind of important means of processing the drilling well unusual condition, also can be used as to answer the collapse instrument on leakiness stratum of commute, can realize small clearance cementing, reduces drilling cost.The reaming hole technology is exactly to adopt a kind of technology that enlarges well with the brill hole reaming tool.Common reamer mainly comprises two kinds of fixed-wing reamer and movable wing reaming hole cutter devices, the fixed-wing reamer mainly is made of drill bit and reamer wing two parts, because reamer wing is larger than the diameter of drill bit, so can get out the borehole diameter that the well that drill bit is got out expands designing requirement to; The movable wing reamer has two kinds of arm-type and piece formulas, and arm-type reamer is that the reaming hole body is fixed on body by bearing pin, and the reaming hole body can be done the rotation of certain angle around bearing pin, and after the reaming hole body opened, therefore diameter can enlarge well through greater than drill bit and reamer body; The reaming hole body of piece formula reamer is wedge-like substantially, but the reaming hole body is fixed on body, therefore can not rotate, but when needing the stratum of reaming hole, under the effect of hydraulic pressure, the reaming hole body is pushed out body and implements reaming hole.
For example, notice of authorization number is exactly a kind of formula reamer for CN202100198 U; Notice of authorization number for CN201843524 U, CN201778658 U and application publication number be the patent document of 101725322 A disclosed be exactly arm-type reamer.
Above-mentioned prior art can be completed specific reaming hole task, but also there is following deficiency: one, due in drilling process, the flexible of reamer wing easily causes drilling fluid to be easy to enter the joint component of reaming hole body, affect the flexibility ratio of wing, the reamer of fixed-wing is received the restriction of tool body wall thickness, therefore the reaming hole size is less, and self energy high-ranking military officer eye enlarges 25% left and right at most, can not satisfy the demand comprehensively.Two, can not suitably enlarge as required the diameter of reamer reaming hole, the limitation of use is larger.Three, hermetically-sealed construction is unreasonable, and in drilling process, in the telescopic process of reamer wing, drilling fluid easily enters the joint component of reaming hole body, affects the flexibility ratio of wing.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that existing reamer exists, a kind of driving shaft mechanism that is applicable to reamer is provided, when moving down under pressure, the utility model can coordinate with wing comprehensively, effectively push wing open, make the diameter of reamer become large, reach the purpose that enlarges well.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of driving shaft mechanism that is applicable to reamer is characterized in that: comprise power transmission shaft and the fixed axis that is fixedly connected with power transmission shaft, the power transmission shaft inner chamber is communicated with the fixed axis inner chamber, is provided with the expander that the wing that drives reamer expands outwardly on fixed axis.
The end that described fixed axis is connected with power transmission shaft is provided with the urceolus sealing ring, the outer tube inner wall fitted seal of urceolus sealing ring and reamer.
The end that described power transmission shaft is connected with fixed axis is provided with passage, and passage is communicated with the urceolus of reamer and the space between power transmission shaft, and the space is between the fixed cover sealing ring of urceolus sealing ring and reamer urceolus.
The other end of described fixed axis is provided with cam path, and expander is arranged in cam path; Be disposed with runner and fixed axis sealing ring, the inwall fitted seal of fixed axis sealing ring and urceolus between cam path and fixed axis end.
Described expander is the cam bit that is fixedly installed in cam path.
Employing the utility model has the advantage of:
one, the utility model comprises power transmission shaft and the fixed axis that is fixedly connected with power transmission shaft, the power transmission shaft inner chamber is communicated with the fixed axis inner chamber, be provided with the expander that the wing that drives reamer expands outwardly on fixed axis, adopt this structure, can coordinate with wing when moving down under pressure comprehensively, effectively push wing open, make the diameter of reamer become large, reach the purpose that enlarges well, and by the expander drive wing mechanism that arranges separately, when implementing reaming hole, the reaming hole arm is convenient to open, has contractility, can not be subject to the restriction of tool body wall thickness as fixed reamer, therefore the reaming hole size is larger, the maximum reaming hole amplitude 25% that surpasses fixed reamer, can be good at satisfying on-the-spot needs.
Two, in the utility model, the end that fixed axis is connected with power transmission shaft is provided with the urceolus sealing ring, the outer tube inner wall fitted seal of urceolus sealing ring and reamer, assembling inter-axle shaft mechanism is sealed in urceolus, in drilling process, although wing mechanism carries out the reaming hole operation outwards opening, drilling fluid is difficult for entering the joint part of reamer inside, can not affect the flexibility ratio of wing mechanism.
Three, in the utility model, the end that described power transmission shaft is connected with fixed axis is provided with passage, passage is communicated with the urceolus of reamer and the space between power transmission shaft, and the space is between the fixed cover sealing ring of urceolus sealing ring and reamer urceolus, the passage that arranges can make liquid by entering the space, reach and increase power transmission shaft top bearing area, power transmission shaft can be moved down faster, the purpose that wing is opened rapidly under expander drives.
Four, in the utility model, the other end of described fixed axis is provided with cam path, and expander is arranged in cam path, expander and fixed axis is connected and fixed more reliable; Be disposed with runner and fixed axis sealing ring between cam path and fixed axis end; the inwall fitted seal of fixed axis sealing ring and urceolus; the fixed axis inner chamber is communicated with by runner with the wing groove; when reaming hole creeps into; liquid in the driving shaft mechanism inner chamber enters the wing groove by runner, can play the effect of cleaning and cooling wing, fixed axis sealing ring and outer tube inner wall fitted seal; can avoid liquid to enter the fixed axis bottom, also just can not affect the normal slip of driving shaft mechanism.
Five, in the utility model, described expander is the cam bit that is fixedly installed in cam path, adopts cam bit to drive wing, and easier to be stressed, reliability is higher.
Description of drawings
Fig. 1 is the general assembly schematic diagram of the utility model when being applied to wing in reamer mechanism and extending out
Fig. 2 is the general assembly schematic diagram of the utility model when being applied to wing in reamer mechanism and drawing in
Fig. 3 is the structural representation of Fig. 1 or Fig. 2 axial rotation 90 degree
Fig. 4 is the utility model structural representation
Fig. 5 is reamer outer tube structure schematic diagram
Fig. 6 is the structure for amplifying schematic diagram of the operator wing of reamer
Fig. 7 is the structure for amplifying schematic diagram of the secondary wing of reamer
Fig. 8 is the cam path structure for amplifying schematic diagram in Fig. 4
Fig. 9 is the radial section schematic diagram of Fig. 8
Figure 10 is B-B face structural representation in Fig. 1
Figure 11 be in Fig. 1 lower end A to structural representation
Be labeled as in figure: 1, power transmission shaft; 2, end cap; 3, packing ring; 4, fixed cover; 5, fixed cover sealing ring; 6, urceolus sealing ring; 7, urceolus; 8, fixing sliding sleeve; 9, connecting pin; 10, back-moving spring; 11, fixed axis; 12, plug sealing ring; 13, cam bit; 14, wing pin; 15, the operator wing; 16, secondary wing; 17, wing stop screw; 18, stop screw packing ring; 19, stopper slot; 20, cam bit screw; 21, fixed axis sealing ring; 22, plug; 23, expansion orbit; 24, spring groove; 25, pin-and-hole; 26, wing groove; 27, wing pin-and-hole; 28, end cap groove; 29, runner; 30, cam path, 31, passage.
The specific embodiment
A kind of driving shaft mechanism that is applicable to reamer comprises power transmission shaft 1 and the fixed axis 11 that is fixedly connected with power transmission shaft 1, and power transmission shaft 1 inner chamber is communicated with fixed axis 11 inner chambers, is provided with the expander that the wing that drives reamer expands outwardly on fixed axis 11.
In the utility model, the end that described fixed axis 11 is connected with power transmission shaft 1 is provided with urceolus sealing ring 6, the urceolus 7 inwall fitted seal of urceolus sealing ring 6 and reamer.
In the utility model, the end that described power transmission shaft 1 is connected with fixed axis 11 is provided with passage 31, and passage 31 is communicated with the urceolus 7 of reamer and the space between power transmission shaft 1, and the space is between the fixed cover sealing ring 5 of urceolus sealing ring 6 and reamer urceolus 7.
In the utility model, the other end of described fixed axis 11 is provided with cam path 30, and expander is arranged in cam path 30; Be disposed with runner 29 and fixed axis sealing ring 21 between cam path 30 and fixed axis 11 ends, the inwall fitted seal of fixed axis sealing ring 21 and urceolus 7.
In the utility model, described expander is the cam bit 13 that is fixedly installed in cam path 30.
Embodiment 2
The present embodiment is that the utility model is applied to the detailed description of carrying out in reaming hole.
Reamer, comprise urceolus 7 and wing mechanism, also comprise and being arranged in urceolus 7 and along urceolus 7 driving shaft mechanism and resetting-mechanism that driving shaft mechanism is resetted in axial sliding, described urceolus 7 upper ends are provided with the first hermetically-sealed construction with driving shaft mechanism outer wall fitted seal, the lower end is provided with wing groove 26, the end of urceolus 7 is provided with the second hermetically-sealed construction, wing mechanism is arranged in wing groove 26, be provided with on driving shaft mechanism and drive the expander that wing mechanism expands outwardly, and the inner chamber of driving shaft mechanism is communicated with wing groove 26.
Wherein, described wing mechanism comprises the operator wing 15 and secondary wing 16, the described operator wing 15 is identical two of structure, be symmetricly set in wing groove 26, secondary wing 16 is identical two of structure, be symmetricly set in wing groove 26, and the operator wing 15 and secondary wing 16 be arranged on same circumference, the external diameter of circumference is identical with the external diameter of urceolus 7.The quantity of the operator wing 15 and secondary wing 16 is not limited to this, but as best mode.
Wherein, be provided with the expansion orbit 23 that coordinates with expander on the described operator wing 15 and secondary wing 16, but be not limited to this mode of expansion orbit, also can adopt other structure of the prior art to realize; The expansion end of the operator wing 15 is hook solid, and the expansion end of secondary wing 16 is the point of a knife shape, and this is best mode for the structure of the operator wing 15 and secondary wing 16, also can adopt similar wing structure of the prior art.
Further, described expansion orbit 23 comprises the straight section of indent and is the segmental arc of one with straight section, and before expanding outwardly, expander is positioned on the straight section of indent, and when expanding outwardly, expander moves on segmental arc.
Wherein, the expansion end of the described operator wing 15 is hook solid, and it is trapezoidal that hook solid is, and trapezoidal upper base is the outer end, and the expansion end of two operator wings arranges in opposite directions, but is not limited to this shape.
Wherein, be provided with stopper slot 19 along extending out direction on the described operator wing 15 and secondary wing 16, be fixedly connected with the locating part that is arranged in stopper slot 19 on wing groove 26, locating part coordinates the expansion ratio that wing is extended out to limit with stopper slot 19, and described locating part is wing stop screw 17.
Wherein, described expander is the cam bit 13 that is fixedly installed on driving shaft mechanism, and described cam bit 13 is four, and the expansion orbit 23 with the operator wing 15 and secondary wing 16 coordinates respectively, and expander also is confined to cam bit, and quantity also is not limited to four.
Wherein, described the first hermetically-sealed construction comprises fixed cover 4 and end cap 2, the upper end of urceolus 7 is set to end cap groove 28, fixed cover 4 and end cap 2 are arranged in end cap groove 28, fixed cover 4 is fixed in end cap groove 28 by end cap 2, is provided with the fixed cover sealing ring 5 that coordinates with the driving shaft mechanism outer wall on fixed cover 4.
Wherein, described the second hermetically-sealed construction comprises plug 22 and plug sealing ring 12, and plug 22 is arranged on urceolus 7 bottoms, and plug sealing ring 12 is arranged on urceolus 7 inwalls and plug 22 fitted seal.
Wherein, have a plurality of pin-and-holes 25 on described urceolus 7, be provided with connecting pin 9 in pin-and-hole 25, be provided with the fixedly sliding sleeve 8 that coordinates with driving shaft mechanism in urceolus 7, fixedly sliding sleeve 8 is connected with urceolus 7 by connecting pin 9.
Wherein, wing groove 26 shapes and wing mechanism that described urceolus 7 lower ends arrange are suitable, be provided with the wing pin-and-hole 27 that is connected with wing mechanism in wing groove 26, the described operator wing 15 be connected wing 16 and be connected with wing groove 26 by wing pin 14, wing pin-and-hole 27 respectively.
Wherein, described driving shaft mechanism comprises power transmission shaft 1 and the fixed axis 11 that is fixedly connected with power transmission shaft 1, and power transmission shaft 1 inner chamber is communicated with fixed axis 11 inner chambers; The end that fixed axis 11 is connected with power transmission shaft 1 is provided with urceolus sealing ring 6, urceolus sealing ring 6 and urceolus 7 inwall fitted seal, fixed cover sealing ring 5 and power transmission shaft 1 outer wall fitted seal.
Wherein, the end that described power transmission shaft 1 is connected with fixed axis 11 is provided with passage 31, and passage 31 is communicated with space between urceolus 7 and power transmission shaft 1, and the space is between fixed cover sealing ring 5 and urceolus sealing ring 6.
Wherein, the other end of described fixed axis 11 is provided with cam path 30, and expander is arranged in cam path 30; Be provided with runner 29 and fixed axis sealing ring 21 between cam path 30 and fixed axis 11 ends, fixed axis 11 inner chambers are communicated with by runner 29 with wing groove 26, fixed axis sealing ring 21 and urceolus 7 inwall fitted seal.
Wherein, described resetting-mechanism comprises back-moving spring 10 and spring groove 24, and spring groove 24 is arranged in urceolus 7 inner chambers, and back-moving spring 10 is arranged in spring groove 24 and coordinates with fixed axis 11.
the operating principle of reamer is: in the time of use, the upper end is connected on drilling tool, G.I.H, need the well section of reaming hole when arrival after, slush pump increases discharge capacity, sprain to press and cause pump pressure to raise in the down-hole, aboveground pressure promotes power transmission shaft 1 and moves down, power transmission shaft 1 compression reseting spring 10 continues descending, be arranged on that the cam bit 13 of power transmission shaft 1 lower end is descending to be contacted with the segmental arc of the expansion orbit 23 of the operator wing 15 and secondary wing 16 respectively, due to the operator wing 15, the internal diameter of the circumference that secondary wing 16 forms is less than cam bit 13 external diameters, deficiency so that cam bit 13 pass through, so cam bit 13 promotes the operator wing 15 simultaneously and secondary wing 16 is expanded outward, the operator wing 15 and secondary wing 16 are opened, under the drive of rig, continue to creep into, because the operator wing outwards opens, strengthened the diameter of reamer, therefore just can enlarge the diameter of well when creeping into, when needs further enlarge the diameter of well, reamer is taken out ground, change larger cam bit 13, G.I.H again, and repeat the work progress of above-mentioned reaming hole, because the model of cam bit 13 is larger, therefore when pushing the operator wing 15 and secondary wing 16 open, the opening width of the operator wing 15 and secondary wing 16 will be larger, therefore the diameter that cuts well will be larger, therefore can play the technique effect of further expansion well.
Embodiment 3
The present embodiment is that the utility model is applied to the detailed description of carrying out in reaming hole equally.
Urceolus 7 is cylindrical structure, there are wing groove 26 and the wing pin-and-hole 27 that is connected the operator wing 15 and secondary wing 16 in cylindrical lower end, the operator wing 15 and secondary wing 16 are connected in wing groove 26 by wing pin-and-hole 27, there is end cap groove 28 rear end of urceolus 7, end cap 2 after assembling is arranged in end cap groove 28, front end at end cap 2 has fixed cover 4, is provided with fixed cover sealing ring 5 between fixed cover 4 and power transmission shaft 1; Be provided with pin-and-hole 25 and spring groove 24 in the stage casing of urceolus 7, after assembling, by pin-and-hole 25 by connecting pin 9 fixed outer cylinders 7 and fixing sliding sleeve 8; The lower end of power transmission shaft 1 is that the reaming hole end is provided with cam path 30 and runner 29, cam path 30 is used for laying cam bit 13, power transmission shaft 1 is connected with fixed axis 11, the cylindrical of fixed axis 11 is all directions structure, outer surface cover at fixed axis 11 has fixedly sliding sleeve 8, and fixedly sliding sleeve 8 is from all directions shape in cylindrical, and the outer all directions structure of fixed axis 11 matches with the fixing interior all directions structure of sliding sleeve 8, the all directions structure that arranges can play and slide up and down, and makes power transmission shaft 1 to the effect of urceolus 7 transmitting torques.
The passage 31 that arranges on power transmission shaft can make liquid pass through, and can play the long-pending effect of enlarging section, reaches the area that increases power transmission shaft 1 upper pressure, promotes power transmission shaft 1, and cam bit 13 is moved downward, and pushes the operator wing 15, secondary wing 16 open; The runner 29 of lower end can play the effect of cleaning and cooling wing when reaming hole creeps into; Are spring grooves 24 in the lower end of fixed axis 11, are provided with back-moving spring 10; Fixedly be provided with fixed pin holes on sliding sleeve 8 bodies, be used for and being fixedly connected with of urceolus 7; Be fixed with respectively the expansion orbit of 13, one cam bits of four cam bits, 13 corresponding wings on four faces of the lower end of power transmission shaft 1 by cam bit screw 20.
Wing mechanism is made of the operator wing 15 and secondary wing 16, the front end of the operator wing 15 is the hook type shape, curved configuration partly has backward trapezoidal, owing to being symmetrical arranged two operator wings 15, so, the trapezium structure that arranges is when drawing two operator wings 15 in, and two trapezium structures can hold mutually, and the operator wing diameter that reaches after gathering is fully consistent with urceolus.The front end of secondary wing 16 is straight pointed shape, straight pointed shape also has backward trapezoidal, owing to being symmetrical arranged two secondary wings 16, so, the trapezium structure that arranges is when drawing two secondary wings 16 in, two trapezium structures also can hold mutually, and the secondary wing diameter that reaches after gathering is fully consistent with urceolus.The structure of drawing in has a lot, and therefore, the structure of wing mechanism is not limited to this.Be provided with expansion orbit 23 on the operator wing 15 and secondary wing 16, wing pin 14 passes pin-and-hole and the wing pin-and-hole 27 of the operator wing 15, the fixing operator wing 15, and secondary wing 16 carries out same fixing; Two symmetrical installations of the wing 15 of operating, two symmetrical installations of secondary wing 16, when 15 gathering of the later operator wing is installed, the crotch part of the curved configuration part of its front end symmetrical wing of trapezoidal mutual income backward; Also be provided with stopper slot 19 on major and minor wing, be connected with wing stop screw 17 in stopper slot, wing stop screw 17 and stop screw packing ring 18 are fixed the wing limited block, carry out spacing to the operator wing 15 and secondary wing 16, restriction wing unlimited expansion is limited in the diameter range of regulation the wing after expansion.
Embodiment 4
The assembling sequence of reamer is:
At the urceolus 7 internal thread directions back-moving spring 10 of packing into, then put into fixedly sliding sleeve 8, fixedly sliding sleeve 8 is from all directions shape in cylindrical, the outer all directions structure of fixed axis 11 matches with the fixing interior all directions structure of sliding sleeve 8; Urceolus sealing ring 6 is installed on power transmission shaft 1, after fixed cover 4 is loaded onto fixed cover sealing ring 5, power transmission shaft 1 is put into urceolus 7 from urceolus 7 internal thread directions, place packing ring 3 on urceolus 7 internal thread end faces, put into again end cap 2, end cap 2 to be threaded, is then put into pin-and-hole 25 to connecting pin 9 with urceolus 7.
Four cam bits 13 are installed on respectively in the cam path 30 on four faces of lower end of power transmission shaft 1, then by cam bit screw 20, the pin-and-hole in cam bit 13 and cam path 30 are connected; Plug 22 and power transmission shaft 1 are threaded connection.
Claims (5)
1. driving shaft mechanism that is applicable to reamer, it is characterized in that: comprise power transmission shaft (1) and the fixed axis (11) that is fixedly connected with power transmission shaft (1), power transmission shaft (1) inner chamber is communicated with fixed axis (11) inner chamber, is provided with the expander that the wing that drives reamer expands outwardly on fixed axis (11).
2. the driving shaft mechanism that is applicable to reamer according to claim 1, it is characterized in that: the end that described fixed axis (11) is connected with power transmission shaft (1) is provided with urceolus sealing ring (6), urceolus (7) the inwall fitted seal of urceolus sealing ring (6) and reamer.
3. the driving shaft mechanism that is applicable to reamer according to claim 2, it is characterized in that: the end that described power transmission shaft (1) is connected with fixed axis (11) is provided with passage (31), passage (31) is communicated with the urceolus (7) of reamer and the space between power transmission shaft (1), and the space is positioned between the fixed cover sealing ring (5) of urceolus sealing ring (6) and reamer urceolus (7).
4. the driving shaft mechanism that is applicable to reamer according to claim 1, it is characterized in that: the other end of described fixed axis (11) is provided with cam path (30), and expander is arranged in cam path (30); Be disposed with runner (29) and fixed axis sealing ring (21) between cam path (30) and fixed axis (11) end, the inwall fitted seal of fixed axis sealing ring (21) and urceolus (7).
5. the driving shaft mechanism that is applicable to reamer according to claim 1 is characterized in that: described expander is for being fixedly installed on the cam bit (13) in cam path (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220648147 CN202970474U (en) | 2012-11-30 | 2012-11-30 | Transmission shaft mechanism appropriate for hole opener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220648147 CN202970474U (en) | 2012-11-30 | 2012-11-30 | Transmission shaft mechanism appropriate for hole opener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970474U true CN202970474U (en) | 2013-06-05 |
Family
ID=48511562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220648147 Expired - Fee Related CN202970474U (en) | 2012-11-30 | 2012-11-30 | Transmission shaft mechanism appropriate for hole opener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337656A (en) * | 2016-08-19 | 2017-01-18 | 李泓胜 | PCD drill bit capable of reaming hole forcibly and internally |
-
2012
- 2012-11-30 CN CN 201220648147 patent/CN202970474U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337656A (en) * | 2016-08-19 | 2017-01-18 | 李泓胜 | PCD drill bit capable of reaming hole forcibly and internally |
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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 |
Granted publication date: 20130605 Termination date: 20211130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |