CN201024938Y - A hydraulic pressure release and salvage tool - Google Patents
A hydraulic pressure release and salvage tool Download PDFInfo
- Publication number
- CN201024938Y CN201024938Y CNU2007201038340U CN200720103834U CN201024938Y CN 201024938 Y CN201024938 Y CN 201024938Y CN U2007201038340 U CNU2007201038340 U CN U2007201038340U CN 200720103834 U CN200720103834 U CN 200720103834U CN 201024938 Y CN201024938 Y CN 201024938Y
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- bullet pawl
- slot
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Abstract
The utility model relates to a hydraulic release and retrievable tool, containing a drill stem adapter, a torque transmission mechanism and a slit pick mechanism, wherein, the torque transmission mechanism contains torque bushing which is connected to the drill stem adapter and is provided with a torque block and a sliding block which can slide along the axes direction; the slit pick mechanism contains a piston mandril and a slit pick; the piston mandril is connected to the inner surface of the drill stem adapter; and the slit pick can slide along the piston mandril by the function of the slit pick rebound spring. Compared with the prior art, the utility model can integrate hydraulic release and salvage function into one entity, bear relatively large pull, pressure and torque, reduce the construction procedure and difficulty and lower operation risk and cost; moreover, the utility model is simple in structure, simple in operation, reliable in performance and wide in application range.
Description
Technical field
The utility model relates to that oil drilling is given up and fishing tool, specifically, relates to a kind of liquid collecting and presses that to give up and salvage function be that the hydraulic pressure of one is given up and fishing tool.
Background technology
The multilateral well technology is to get out a plurality of branch well holes in a main borehole, branch's well casing string need be sent into a well and realize giving up in the Multilateral Wells operation, running tool commonly used is at present sent instrument to be connected by the shear pin connected mode with quilt, and realizes giving up by modes such as hydraulic pressure or back-offs.Because the underground working more complicated, therefore relatively strict to the design of shear pin, the shear pin design is too little, is easy to cut off in advance in sending into the way; Shear pin is too big, and difficulty increases when cutting off in the down-hole, destroys institute's running tool easily.And these running tools all can not rotate in operation process at present.In addition, in order to realize the reentry of main shaft and branch well hole, usually will send into the reentry steering tool in the Multilateral Wells operation, after the reentry operation is finished, also need the reentry steering tool is salvaged out, normal at present employing reversible fishing spear is salvaged.
Because underground working more complicated, branch's well casing string is sent into operation in the Multilateral Wells operation, and no matter adopting existing hydraulic pressure to give up still is that the back-off releasing tool is sent into, and the pipe string that is admitted to is hampered in the down-hole, tool string can not rotate, and is easy to influence efficiency of operation and success rate.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of collection to send into and gives up and salvage instrument into one, is used for easily and efficiently will the instrument of being admitted to being sent to the down-hole and carrying out instrument from the down-hole and salvage.
In order to solve the problems of the technologies described above, the utility model provides a kind of hydraulic pressure to give up and fishing tool, comprises tool joint, torque-transmitting mechanisms and slot bullet pawl mechanism, wherein:
Described torque-transmitting mechanisms comprises the torque sleeve that is connected in the described tool joint, the slide block that be fixed with the moment of torsion piece on it, can slide along axis direction;
Described slot bullet pawl mechanism comprises the piston axle on the inner surface that is connected tool joint, the slot bullet pawl that can slide along the piston axle under the effect of slot bullet pawl back-moving spring.
Above-mentioned hydraulic pressure give up and fishing tool in, described torque sleeve is along there being elongated hole on the tube axial direction, described slide block slides in described elongated hole.Further, described slide block slides along described piston axle.Further, between described moment of torsion mantle cavity and the described piston axle moment of torsion block reset spring is arranged, this moment of torsion block reset spring one end withstands on described torque sleeve end, and the other end withstands on the described slide block.
Above-mentioned hydraulic pressure give up and fishing tool in, described torque sleeve has a step towards tube axial direction on the end inwall of described elongated hole away from described that end of tool joint.Further, described slot bullet pawl back-moving spring is between described torque sleeve and described piston axle, and this described slot bullet pawl back-moving spring one end withstands on described torque sleeve on the step of tube axial direction, and the other end withstands on described slot bullet pawl tail end.
Above-mentioned hydraulic pressure give up and fishing tool in, the afterbody of described slot bullet pawl is positioned at described torque sleeve.Further, the tail end of described slot bullet pawl has the step towards tube axial direction, and described piston axle is positioned at the part in slot spring claw tube chamber, and outside raised step is arranged.
Above-mentioned hydraulic pressure give up and fishing tool in, there is a steeper slope pawl head corresponding position of described piston axle and described slot bullet pawl, and carries out the transition to slow slope.
Above-mentioned hydraulic pressure give up and fishing tool in, the instrument that is admitted to that matches with this instrument or by fishing tool possesses fish neck groove structure.Further, the described instrument that is admitted to further possesses the torsional channel structure.
Compared with prior art, the utlity model has following characteristics:
1) liquid collecting presses that to give up and salvage function be one;
2) can bear big pulling force, pressure and moment of torsion;
3) construction sequence and difficulty be can reduce, operating risk and cost reduced;
4) simple in structure, easy and simple to handle, dependable performance, applied widely.
Description of drawings
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is corresponding with the utility model indispensable structural representation of execution of instrument example that is admitted to;
Fig. 3 is that the utility model cooperates installation embodiment schematic diagram with the instrument of being admitted to.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
A kind of hydraulic pressure of the utility model design is given up and fishing tool, as shown in Figure 1, mainly is made up of torque-transmitting mechanisms, slot bullet pawl mechanism and hydraulic pressure releasing gadget, both can be used for sending into of instrument, also can be used for the salvaging of downhole tool.When needing running tool, ground the utility model and the instrument instrument of installing that need send into are sent into put in place after, pitching builds the pressure or directly with big discharge capacity turn on pump circulation, can give up smoothly; Before giving up,, then can pass through the torque-transmitting mechanisms transfer torque, realize rotation if the instrument of being sent into needs rotation; During salvaging, only need to send into instrument described in the utility model to the precalculated position according to brill program under the routine, apply certain the pressure of the drill then, press down instrument described in the utility model to the chamber that the downhole tool that will salvage runs through, after locking with the instrument that will salvage, can on carry the utility model, take the instrument that the down-hole will be salvaged out of, take the utility model and the instrument salvaging out apart on ground; If the instrument of being salvaged in the salvaging process is obstructed, can by on put pressure the utility model, perhaps come unfreezing by rotation the utility model, if it is serious to be obstructed, then the instrument of being salvaged is given up, prevent bit freezing.
Referring to Fig. 1, instrument described in the utility model is connected on the drilling rod by tool joint 1, and the instrument that send into is delivered to the precalculated position, down-hole, perhaps entering the precalculated position salvages, mainly comprise torque-transmitting mechanisms, slot bullet pawl mechanism and hydraulic pressure releasing gadget, wherein:
Torque-transmitting mechanisms is rotated in order to drive the instrument of being admitted in the process of running tool, comprises a tubulose torque sleeve 3 that is connected in the tool joint 1; Torque sleeve 3 has the elongated hole 17 of strip along tube axial direction; At elongated hole 17 that end away from tool joint 1, oriented the step 19 in axle center makes progress in the inwall week of torque sleeve 3; Sliding sleeve 5 is arranged in the hole of elongated hole 17, be fixed with moment of torsion piece 6 on the sliding sleeve 5; In the tube chamber of torque sleeve 3, there are moment of torsion block reset spring 4, one ends to withstand in the tool joint 1 along tube axial direction, the other end withstands on the slide block 5.
After torque sleeve 3 is socketed in the tool joint 1, further fixing by holding screw in first set screw hole 2 and tool joint 1; Step 19 on the inwall of torque sleeve 3 further improves torque sleeve 3 intensity herein, and provides stress point for instrument miscellaneous part described in the utility model.Load-bearing screw hole 7 is arranged on the slide block 5, moment of torsion piece 6 by the load-bearing screw in the load-bearing screw hole 7 on sliding sleeve 5.Under the effect of external force, sliding sleeve 5 can move on tube axial direction along the elongated hole on the torque sleeve 3 17.Torque sleeve 3 has a step 18 in middle position near tool joint 1, and torque sleeve 3 attenuates from this step 18 away from that end of tool joint 1, and elongated hole 17 passes this step 18.
When at ground the utility model with will send into downhole tool and assemble the time, elongated hole 17 provides certain activity space for the moment of torsion piece 6 in the sliding sleeve 5, go for cooperating of the utility model and multiple instrument, moment of torsion block reset spring 4 has guaranteed that moment of torsion piece 6 is positioned at the corresponding position of the instrument of being admitted to all the time in sending into process.
Slot bullet pawl mechanism is connected with the instrument of being admitted to or by fishing tool in order to instrument described in the utility model, comprises the tubular piston axle 14 of passing moment of torsion block reset spring 4, is socketed on the inner surface of tool joint 1; Along the slot bullet pawl 13 that piston axle 14 can be slided on tube axial direction, slot bullet pawl 13 is formed by tail pipe and along a plurality of bullet pawls that circumferentially distribute, and possesses elasticity preferably, adopts complete pipe material slot to form.The afterbody of slot bullet pawl 13 is positioned at the end of torque sleeve 3 away from that end of tool joint 1, is enclosed within the inside of torque sleeve 3, and with the inwall of torque sleeve 3 certain interval is arranged, and is convenient to slot bullet pawl 13 and slides in torque sleeve 3 along piston axle 14; A slot bullet pawl back-moving spring 20 is arranged in torque sleeve 3 pipes, and these slot bullet pawl back-moving spring 20 1 ends withstand on step 19 places of torque sleeve 3, and the other end withstands on the afterbody of slot bullet pawl 13.
Second set screw hole 8 is arranged on the step 19 of torque sleeve 3, and by the screw in this screw hole, torque sleeve 3 realizes that with piston axle 14 tightening is connected.The tail end of slot bullet pawl 13 has circumferential step 24 towards tube axial direction, and step 24 is connected and sealed by RUBBER O circle 11 and piston axle 14.Piston axle 14 has an outside raised step 25 in the part that is positioned at slot bullet pawl 13 chambeies and close slot bullet pawl 13 afterbodys, be with RUBBER O circle 12 on it, realize the sealing of piston axle 14 and slot bullet pawl 13 inwalls, and the step 24 on this step 25 and slot bullet pawl 13 tail ends makes slot bullet pawl 13 can not deviate from torque sleeve 3 under the effect of slot bullet pawl back-moving spring 20 to cooperating.Piston axle 14 is at that end away from tool joint 1, pawl head corresponding position with slot bullet pawl 13, carry out the transition to slow slope 22 by a steeper slope 21, and carry out the transition to a ledge structure 26 again, the pawl head of slot bullet pawl 13 is under the effect of external force or slot bullet pawl back-moving spring 20, can slide along steeper slope 21 and slow slope 22, and be parked in this step 26 places.Slot bullet pawl 13 has a step on the tail pipe external surface of distance torque sleeve 3 certain distances, be used for when the fishing tool of down-hole, and this stepped portions slides into after torque sleeve 3 contacts, and increases slot bullet pawl 13 and enters by the pressure of fishing tool.
The utility model is with will send into downhole tool and assemble the time on the ground, and in the intersection of torque sleeve 3 with slot bullet pawl 13, by the shear pin in the shear pin hole 9, realization torque sleeve 3 is connected with slot bullet pawl 13.Sent after instrument enters the precalculated position, cut off the shear pin in the shear pin hole 9 by building the pressure after, shear pin is positioned at the part of slot bullet pawl 13 and has stayed on the slot bullet pawl 13, and the part that is positioned at torque sleeve 3 comes off easily, therefore in the end of torque sleeve 3 pin hole 10 is arranged circumferentially, the parts that the shear pin of being cut off by the dowel fixes in the pin hole 10 is stayed in the torque sleeve 3 do not drop.
The hydraulic pressure releasing gadget, be used for being sent instrument to arrive the precalculated position after, instrument described in the utility model and the instrument that is admitted to broken away from realize giving up, comprise the nozzle connection 15 that is connected with piston axle 14, and the hole 16 that is used to install nozzle on the nozzle connection 15.On the head of hydraulic pressure releasing gadget, can further include a hole 23, be used for when circulating fluid, increasing the flow of circulation; Carry out hydraulic pressure when giving up building the pressure, also can build the pressure by pitching promptly increases the fluid pressure of suppressing in nozzle connection inside, certainly, also can realize fluid pressure is increased to without pitching and is enough to make instrument described in the utility model and the instrument that is admitted to break away from.
Carry out instrument when sending in order to be used with the utility model, the instrument that is admitted to also needs certain indispensable structure, as shown in Figure 2, the position of matching with moment of torsion piece 6 in the utility model torque-transmitting mechanisms, need design that torsional channel 30 is arranged, in order that moment of torsion piece 6 is placed this torsional channel 30; With first set screw hole, the 2 corresponding positions of instrument described in the utility model, design has screw hole 31, is convenient to install holding screw; In addition, the instrument that is admitted to is also needing to design fish neck groove 32 with the utility model slot bullet pawl 13 corresponding positions.
The utility model is with will send into downhole tool and assemble the time on the ground, the part that respectively will the instrument of being admitted to contains torsional channel 30 is installed to torque-transmitting mechanisms part of the present utility model, and the part that will contain fish neck groove 32 is installed to the utility model slot bullet pawl mechanism part.
When the installation instrument of being admitted to contains the part of torsional channel 30, moment of torsion piece 6 of the present utility model is installed in the torsional channel 30 that is sent instrument, and, further fixes holding screw by being installed on screw hole 31, like this, in sending into process as when running into the situation that needs rotation, then can be by rotation instrument described in the utility model, transfer torque to the instrument of being admitted to by moment of torsion piece 6, thereby realize the rotation of the instrument that is admitted to if there are mud cake or mud deposition in the down-hole, but turn on pump carries out circulation of drilling fluid.
When the installation instrument of being admitted to contains the part of fish neck groove 32, slot bullet pawl 13 of the present utility model is installed in the fish neck groove 32 that is sent instrument, stressed and the radial contraction of slot bullet pawl 13, after in entering fish neck groove 32, slot bullet pawl 13 flicks, and be stuck in the fish neck groove, make the utility model can not come off with the instrument that is admitted to easily.
As shown in Figure 3, after the part that the instrument of being admitted to contains the part of torsional channel 30 and contains fish neck groove 32 all is installed on the instrument described in the utility model, again with these two parts by being threaded togather, just can carry out being sent sending into of instrument to operate.Send into put in place after, confirm the institute's tool positioned of sending success, in the time of need giving up, drop into steel ball from ground, and the circulation discharge capacity of increasing drilling fluid, because the steel ball that falls under the pressure of drilling fluid is blocking up the hole 23 of hydraulic pressure releasing gadget, drilling fluid can only circulate by nozzle 16, therefore partly put aside bigger pressure at hydraulic pressure releasing gadget of the present utility model, make that the shear pin in the shear pin hole 9 is cut off, and slot bullet pawl 7 is admitted to the extruding force of instrument inwall and is radially bounced back, after this extruding force surpasses certain value, the slot bullet pawl 7 of instrument described in the utility model is just thrown off from fish neck groove 32 parts of the instrument of being admitted to, thereby realizes being admitted to giving up of instrument.
The utility model is when assembling with the instrument of being admitted to, at 9 places, shear pin hole shear pin can be installed, and then pin is not installed in the pin hole 10, instrument described in the utility model and the instrument of being admitted to are connected by slot bullet pawl 13 and fish neck groove 32, also can reach the bonding strength of the described instrument of being admitted to being sent into the down-hole.Having shear pin herein to connect when mounted, is to improve instrument described in the utility model and the bonding strength that is admitted to instrument in the process in order to send at instrument.
When giving up, also can not adopt pitching to lose, and directly by strengthening the circular flow of drilling fluid, still can produce in nozzle connection part of the present utility model is enough to realize the pressure of giving up.
The fishing tool that matches and use with the utility model must have fish neck groove structure.When utilizing instrument described in the utility model to carry out the downhole tool salvaging, only need to send into instrument described in the utility model and arrive the precalculated position according to brill program under the routine, apply certain the pressure of the drill then, press down instrument described in the utility model, slot bullet pawl 7 with contacted by fishing tool the back stressed, it is up to promote slot bullet pawl back-moving spring 20, simultaneously slot bullet pawl 7 is subjected to the extruding force of the vatman of institute tool inwall and radial contraction, enter in the vatman of the institute tool, continue to be fed into, enter by after the fish neck groove of fishing tool, slot bullet pawl 7 of the present utility model opens, under the effect of slot bullet pawl back-moving spring 20, slot bullet pawl 7 resets simultaneously.Like this, instrument described in the utility model just connects together with the instrument that will salvage, just can salvage.
The utility model is that a kind of internal diameter slot type is given up and fishing tool, and liquid collecting is pressed to give up and salvage function and is One has realized that an instrument possesses multiple use, is mainly used in the branch in the petroleum multilateral well operations Well casing string or Multilateral Wells instrument reentry fairlead etc. are admitted to sending into and salvaging of instrument, also can be used for routine Various tool sends into salvaging with recyclable instrument in the operation. Instrument described in the utility model can bear Big pulling force, pressure and moment of torsion are compared with existing instrument, owing to designed torque-transmitting mechanisms, are admitted to Instrument can rotate in sending into process, adapts to different drillng operation operating modes, can reduce the construction of Multilateral Wells The technical difficulty of program and construction improves efficiency of construction and success rate, reduces operating risk and operating cost, And it is simple in structure, and is easy and simple to handle, and dependable performance is applied widely.
Claims (11)
1. a hydraulic pressure is given up and fishing tool, it is characterized in that, comprises tool joint, torque-transmitting mechanisms and slot bullet pawl mechanism, wherein:
Described torque-transmitting mechanisms comprises the torque sleeve that is connected in the described tool joint, the slide block that be fixed with the moment of torsion piece on it, can slide along axis direction;
Described slot bullet pawl mechanism comprises the piston axle on the inner surface that is connected tool joint, the slot bullet pawl that can slide along the piston axle under the effect of slot bullet pawl back-moving spring.
2. instrument as claimed in claim 1 is characterized in that, described torque sleeve is along there being elongated hole on the tube axial direction, and described slide block slides in described elongated hole.
3. instrument as claimed in claim 2 is characterized in that, described slide block slides along described piston axle.
4. instrument as claimed in claim 3 is characterized in that, between described moment of torsion mantle cavity and the described piston axle moment of torsion block reset spring is arranged, and this moment of torsion block reset spring one end withstands on described torque sleeve end, and the other end withstands on the described slide block.
5. instrument as claimed in claim 1 is characterized in that, described torque sleeve has a step towards tube axial direction on the end inwall of described elongated hole away from described that end of tool joint.
6. instrument as claimed in claim 5, it is characterized in that, described slot bullet pawl back-moving spring is between described torque sleeve and described piston axle, and this described slot bullet pawl back-moving spring one end withstands on described torque sleeve on the step of tube axial direction, and the other end withstands on described slot bullet pawl tail end.
7. instrument as claimed in claim 1 is characterized in that, the afterbody of described slot bullet pawl is positioned at described torque sleeve.
8. instrument as claimed in claim 7 is characterized in that, the tail end of described slot bullet pawl has the step towards tube axial direction, and described piston axle is positioned at the part in slot spring claw tube chamber, and outside raised step is arranged.
9. instrument as claimed in claim 1 is characterized in that, there is a steeper slope pawl head corresponding position of described piston axle and described slot bullet pawl, and carries out the transition to slow slope.
10. instrument as claimed in claim 1 is characterized in that, the instrument that is admitted to that matches with this instrument or by fishing tool possesses fish neck groove structure.
11. instrument as claimed in claim 10 is characterized in that, the described instrument that is admitted to further possesses the torsional channel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201038340U CN201024938Y (en) | 2007-03-14 | 2007-03-14 | A hydraulic pressure release and salvage tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201038340U CN201024938Y (en) | 2007-03-14 | 2007-03-14 | A hydraulic pressure release and salvage tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201024938Y true CN201024938Y (en) | 2008-02-20 |
Family
ID=39098795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201038340U Expired - Fee Related CN201024938Y (en) | 2007-03-14 | 2007-03-14 | A hydraulic pressure release and salvage tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201024938Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206181A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Top packer recovery tool |
| CN104563931A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Downward-inserting and recycling combined tool for drilling well track measuring instrument |
| CN104790893A (en) * | 2015-02-12 | 2015-07-22 | 中国海洋石油总公司 | Feeding tool assembly for suspending packer used for horizontal well multi-sectional fracture |
| CN104879078A (en) * | 2014-03-02 | 2015-09-02 | 山东兆鑫石油工具有限公司 | Releasing apparatus |
| CN104963643A (en) * | 2015-05-29 | 2015-10-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Corss-core fishing spear tool |
| CN105114021A (en) * | 2015-09-17 | 2015-12-02 | 湖南唯科拓石油科技服务有限公司 | Hanging sealer for installing velocity string in oil pipe and feeding and recovering tool of hanging sealer |
| CN106522866A (en) * | 2015-09-15 | 2017-03-22 | 中国石油化工股份有限公司 | A fishing device |
| CN110043209A (en) * | 2019-05-28 | 2019-07-23 | 成都阿斯贝瑞科技有限公司 | A kind of novel hydraulic releasing tool |
-
2007
- 2007-03-14 CN CNU2007201038340U patent/CN201024938Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206181A (en) * | 2013-04-22 | 2013-07-17 | 中国海洋石油总公司 | Top packer recovery tool |
| CN104563931A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Downward-inserting and recycling combined tool for drilling well track measuring instrument |
| CN104563931B (en) * | 2013-10-27 | 2016-12-07 | 中国石油化工集团公司 | Enter under well-drilling borehole trajectory measurement instrument, reclaim tool kit |
| CN104879078A (en) * | 2014-03-02 | 2015-09-02 | 山东兆鑫石油工具有限公司 | Releasing apparatus |
| CN104879078B (en) * | 2014-03-02 | 2017-06-06 | 山东兆鑫石油工具有限公司 | A kind of releasing device |
| CN104790893A (en) * | 2015-02-12 | 2015-07-22 | 中国海洋石油总公司 | Feeding tool assembly for suspending packer used for horizontal well multi-sectional fracture |
| CN104963643A (en) * | 2015-05-29 | 2015-10-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Corss-core fishing spear tool |
| CN104963643B (en) * | 2015-05-29 | 2017-10-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of interior punching fishing spear instrument |
| CN106522866A (en) * | 2015-09-15 | 2017-03-22 | 中国石油化工股份有限公司 | A fishing device |
| CN105114021A (en) * | 2015-09-17 | 2015-12-02 | 湖南唯科拓石油科技服务有限公司 | Hanging sealer for installing velocity string in oil pipe and feeding and recovering tool of hanging sealer |
| CN105114021B (en) * | 2015-09-17 | 2019-01-15 | 湖南唯科拓石油科技服务有限公司 | The suspension sealer of installation speed tubing string and its feeding and recycling tool in oil pipe |
| CN110043209A (en) * | 2019-05-28 | 2019-07-23 | 成都阿斯贝瑞科技有限公司 | A kind of novel hydraulic releasing tool |
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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: 20080220 Termination date: 20150314 |
|
| EXPY | Termination of patent right or utility model |