CN2522597Y - Desert auger drilling rig - Google Patents
Desert auger drilling rig Download PDFInfo
- Publication number
- CN2522597Y CN2522597Y CN 01274748 CN01274748U CN2522597Y CN 2522597 Y CN2522597 Y CN 2522597Y CN 01274748 CN01274748 CN 01274748 CN 01274748 U CN01274748 U CN 01274748U CN 2522597 Y CN2522597 Y CN 2522597Y
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- Prior art keywords
- derrick
- pipeline
- joint
- connects
- hydraulic
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a desert auger drilling rig. A derrick is arranged on a bird wagon. A transmission mechanism of the bird wagon pushes the simultaneous rotation of the two front wheels and the two back wheels through a output shaft and a universal flex shaft; the bird wagon is provided with a derrick landing gear, a driving force device, a spiral drilling rod, a tie-in. a aiguille and a extension supporting leg; the landing of the derrick, the driving force device and the extension supporting leg; are controlled by a hydraulic-pressure loop of a hydraulic-pressure system. An oil pump of the hydraulic-pressure loop is provided with power by a motorcycle engine. The utility model realized the driving of the front wheels and the back wheels. The hydraulic-pressure traditional system of the utility model is of high pressure, low temperature rising and huge power. The mechanical function components controlled by the hydraulic-pressure traditional system is of reliable performance. The whole performance and the working efficiency of the drilling machine are high. Detonator used for exploration can be arranged through the middle of the drilling rod. The utility model reduces the operation cost.
Description
Technical field
The utility model relates to oil exploration and geology mining site drilling equipment, specifically a kind of desert screw drilling machine vehicle.
Background technology
Carry out oil exploration and the probing of geology mining site in desert area and conditions of similarity area, need to use the wagon drill of conveniently moving, existing wagon drill has plenty of import equipment, and its structure is too complicated, the cost height.
In order to adapt to the desert area drillng operation better, particularly adapt to after can not forming the drilling well of borehole wall area and finishing, transfer the requirement of explosive in the middle of the drilling rod, improve hydraulic system simultaneously and increase power, the realization front and back wheel drives, and we have developed the new model of probing wagon drill again.
Summary of the invention
The purpose of this utility model is in order to adapt to the desert area oil, the requirement of geological prospecting, a kind of improved desert screw drilling machine vehicle is provided, it realizes that front and rear wheel drives simultaneously, its hydraulic pressure legacy system pressure height, temperature rise is low, power is big, the mechanical functional parts reliable in action of its control, rig whole capability and high efficiency, and can in the middle of drilling rod, transfer exploration explosive, reduce operating cost.
The purpose of this utility model is achieved in that
A kind of desert screw drilling machine vehicle, it on an offroad vehicle, is characterized in that derrick installation:
In the transmission mechanism of this car, behind automobile engine, speed-changing gear box, be connected with a transfer case, the output shaft of this transfer case drives front and rear wheel respectively by universal telescopic shaft and rotates simultaneously;
This car is provided with derrick take-off and landing device, power head device, auger stem, joint, drill bit and telescopic outrigger;
Being configured to of described derrick take-off and landing device: the affixed a plate of this derrick, this junction plate lower end is articulated in a support, this support is connected in a base, this junction plate upper end is articulated in the top of an oil cylinder piston, this oil cylinder lower end is articulated in this base, the stroke of this oil cylinder limits two positions of derrick, and one is the operating position, and derrick is positioned at tail of the body perpendicular to ground; It is two for the folding and unfolding position, and derrick is positioned at the vehicle body top to be placed, by the bracket supports that is fixed in vehicle body;
Described power head device is arranged on the derrick, and this power head device can be along the slide that is provided with on the derrick, and it is contained in central tube on the unit head, this central tube lower end jointed rod joint and drilling rod by gearbox drive;
The derrick of this car rises and falls, unit head motor and telescopic outrigger be by the hydraulic circuit control of same hydraulic system.
Being configured to of described transfer case, this transfer case have-has the closed box of lid, and power shaft, jackshaft and output shaft are housed in the bearing support of this casing;
Described power shaft has overhanging end to connect the automobile gear gearbox, circumferentially be fixed with a shift fork cover at the middle part of this power shaft, this shift fork overlaps when moving axially to the right left respectively with before the gear coupling interlock, backgear, before being somebody's turn to do, the backgear kink is on this power shaft, before being somebody's turn to do, back kink gear respectively be fixed on the jackshaft before, back fixed gear engagement, front gear on this jackshaft and the engagement of the fixed gear on the output shaft, before this output shaft has, back overhanging end is protruding from the housing bearing seat of transfer case, its overhanging end forward drives front axle through universal telescopic shaft, and its overhanging end backward connects trailing wheel differential gear train assembly through universal telescopic shaft.
Described derrick is contained on the translating device, and it is configured to:
The base that bearing and oil cylinder connected of this derrick take-off and landing device is for can move horizontally base, this base connects drilling machine platform with slide rail, this drilling machine platform is fixed in vehicle body, and an end hinged of this movable base moves oil cylinder, and this moves oil cylinder and holds the seat hinged securement in the bearing of drilling machine platform in addition.
The drilling rod that described unit head lower end connects is an auger stem, and this drilling rod is for placing the hollow tube of explosive, and its shaft cylindrical is provided with flight, and these shaft two ends are respectively arranged with female adapter and male connection, and this nipple place is provided with the shackle muscle;
This drilling rod lower end connects the joint and the disposable drill bit of split, joint is the hollow cylinder that internal thread hole is arranged at top, little rank, the upper end cylinder of its underpart circular hole and drill bit joint portion ladder cylinder matches, the lower surface of this joint contacts with the terrace of drill bit joint portion, this joint is provided with at least one driving part, is connected with at least one helical blade on the periphery of joint;
Drill bit is made up of the joint portion and the operate portions of disjunctor, and the joint portion is up-small and down-big ladder cylinder, and the cylindrical center of this ladder is for there being end circular hole; There is drill lip on the surface of its operate portions, has a position that is used to drive on the drill bit at least; The corresponding site of this position and joint constitutes the grafting that can finish synchronous rotation;
After drill bit broke away from joint, this drilling rod communicated with the endoporus of joint and can put from the top down and establish explosive.
The gabarit of described drill bit operate portions is cone shape.
The pipeline of described hydraulic system hydraulic circuit is configured to:
One group of three high-pressure and hydraulic oil pump, its input connect fuel tank through oil filter respectively, and each delivery side of pump is connected with pressure meter respectively;
Wherein a delivery side of pump is communicated with the multiple directional control valve group through pipeline, and the outlet that this multichannel is changed the valve group connects compression motor through pipeline, and another outlet connects the unit head motor through pipeline;
Another delivery side of pump connects the multiple directional control valve group through pipeline, the output of one of this reversal valve group connects the derrick lift ram by the road, on the pipeline of this oil cylinder, be provided with one-way damper valve, two outputs in addition of this reversal valve group connect two rear support leg oil cylinders respectively through pipeline, this oil cylinder be provided with bidirectional hydraulic lock into and out of pipeline, another output of this reversal valve connects two derricks through pipeline and moves oil cylinder, this oil cylinder be provided with bidirectional hydraulic lock into and out of pipeline, another output channel of this reversal valve group connects compression motor;
Another delivery side of pump connects hydraulic oil cooler assembly and overflow valve respectively through pipeline, and the loop of this cooler is communicated with fuel tank through oil filter.
Described hydraulic oil pump is driven through transmission mechanism by the motor of locomotive.
The utility model has following actively useful effect;
1. this wagon drill is realized the forward and the oppositely four-wheel drive of the variable-ratio of front and rear wheel with transmission case, adapts to desert area and open-air drilling operation;
2. the derrick of this wagon drill can be hoisted and translation by HYDRAULIC CONTROL SYSTEM, and is easy to operate;
3. this wagon drill uses supporting auger stem, and joint and series disposable drill bit can be abandoned drill bit in operation, and places explosive from top to bottom from the drilling rod top, the special adaptation in the desert area that can not form the borehole wall from the middle requirement of transferring explosive of drilling rod;
4. the functional parts of main machinery of this wagon drill are by HYDRAULIC CONTROL SYSTEM, the pressure height, and temperature rise is low, and this hydraulic system provides power by locomotive engine, and power is big, rig overall work ability and high efficiency.
Accompanying drawing number
Fig. 1 is the structural representation of the utility model one embodiment, and derrick is positioned at the folding and unfolding position;
Fig. 2 is the rear elevation of Fig. 1, and derrick is positioned at the operating position;
Fig. 3 is the elevational cross-sectional view of transfer case among Fig. 1;
Fig. 4 is the lateral view of Fig. 3;
Fig. 5 is the structural representation of derrick take-off and landing device of the present utility model;
Fig. 6 is the A-A partial view of Fig. 5;
Fig. 7 is the structural representation of Fig. 1 medium power head unit;
Fig. 8 is the structural representation of derrick translating device of the present utility model;
Fig. 9 is the vertical view of Fig. 8;
Figure 10 is the structural representation of the auger stem installed in the utility model derrick;
Figure 11 is and the supporting joint of Figure 10 and the structural representation of drill bit;
Figure 12 is the B-B partial sectional view of Figure 11;
Figure 13 is the hydraulic circuit pipeline configuration figure of the utility model Hydraulic Power Transmission System one embodiment.
Accompanying drawing number:
1. offroad vehicle
101. wheel assembly before motor 102. speed-changing gear boxs 103.
104. the universal telescopic shaft in universal telescopic shaft 106. backs before trailing wheel and the differential assembly 105.
107. support 108. telescopic outriggers
2. transfer case
201. casing 202. power shafts 203. jackshafts
204. output shaft 205. shift forks overlap 206. kink gears
207. kink gear 208. is fixed in the gear that the gear 209. of axle is fixed in axle
210. be fixed in the gear 211. preceding overhanging end 212. back overhanging ends of axle
3. derrick
301. junction plate
4. derrick take-off and landing device
401. support 402. bases 403. oil cylinders
404. hinge pin 405. hinge pins 406. tilt adjustment plates
407. alignment pin 408. oil cylinders are locked 409. connectors
410. bearing pin
5. power head device
501. kinetic pump 502. gear-boxes 503. central tubes
504. gear 505. gears 506. locknuts
507. junction block 508. drilling rods 509. shackle casings
510. attachment screw
6. derrick translating device
601. movable pedestal 602. drilling machine platforms 603. move oil cylinder
604. bearing
7. auger stem 701. hollow tubes 702. flights
703. female adapter 704. male connections 705. shackle muscle
706. sheath
8. joint
801. internal thread 802. circular holes 803. helical blades
804. under stretch convex
9. drill bit
901. ladder cylinder 902. has end circular hole 903. drill lips
904. breach 905. sealing rings
10. hydraulic drive circuit
The specific embodiment
Please refer to Fig. 1, Fig. 2, the utility model is a kind of desert screw drilling machine vehicle, it is installed in derrick 3 on the offroad vehicle 1, in the transmission mechanism of this car, behind 1 of automobile engine 01, speed-changing gear box 102, be connected with a transfer case 2, the output shaft of this transfer case 2 drives front and rear wheel active rotation simultaneously respectively by universal telescopic shaft, and realizes speed change.
This car is provided with derrick take-off and landing device 4, power head device 5, auger stem 7, joint 8, drill bit 9 and telescopic outrigger 108;
Please refer to Fig. 5, Fig. 6, being configured to of described derrick take-off and landing device 4: these derrick 3 affixed a plate 301, this junction plate lower end is articulated in a support 401, this support is connected in a base 402, this junction plate upper end is articulated in the top of an oil cylinder piston 403, and this oil cylinder lower end is articulated in this base 402, and the stroke of this oil cylinder 403 limits two positions of derrick 3, one is the operating position, and derrick is positioned at tail of the body perpendicular to ground; It is two for the folding and unfolding position, and derrick is positioned at the vehicle body upper horizontal to be placed, by support 107 supportings of being fixed in vehicle body;
Please refer to Fig. 7, described power head device 5 is arranged on the derrick 3, and this power head device 5 can move along the slide rail on the derrick, and it is contained in central tube on the unit head, this central tube lower end jointed rod joint 507 and drilling rod 7 by gear-box 502 transmissions.
The derrick of this car rises and falls, unit head motor and telescopic outrigger be by hydraulic circuit 10 controls of same hydraulic system.
Please refer to Fig. 3, Fig. 4, being configured to of described transfer case 2, this transfer case have-has the closed box 201 of lid, and power shaft 202, jackshaft 203 and output shaft 204 are housed in the bearing support of this casing;
Described power shaft 202 has overhanging end to connect the automobile gear gearbox, circumferentially be fixed with shift fork cover 205 at the middle part of this power shaft, this shift fork overlaps when moving axially to the right left respectively with the forward and backward gear 206,207 of gear coupling interlock, this forward and backward gear kink is on this power shaft 202, and this forward and backward kink gear is realized two stage speed change with forward and backward fixed gear 208,209 engagements that are fixed on the jackshaft respectively; Front gear 208 on this jackshaft and the fixed gear engagement 210 on the output shaft 204, this output shaft has forward and backward overhanging end 211,212 protruding from the housing bearing seat of transfer case 2, its overhanging end 211 forward drives front axle through universal telescopic shaft 105, and its overhanging end 212 backward connects trailing wheel differential gear train assembly through universal telescopic shaft 106.
Please refer to Fig. 8, Fig. 9, described derrick 3 is contained on the translating device 6, and it is configured to:
The base that bearing and oil cylinder connected 402 of this derrick take-off and landing device is for can move horizontally base, this base connects drilling machine platform 602 with slide rail, this drilling machine platform 602 is fixed in vehicle body, the hinged mobile oil cylinder 603 of one end of this movable base, this moves oil cylinder 603 and holds the seat hinged securement in the bearing 604 of drilling machine platform 602 in addition.
Please refer to Figure 10, the drilling rod 7 that described unit head 5 lower ends connect is an auger stem, this drilling rod is for placing the hollow tube 701 of explosive, its shaft cylindrical is provided with flight 702, these shaft two ends are respectively arranged with female adapter 703 and male connection 704, and this nipple place is provided with shackle muscle 705;
Please refer to Figure 11, Figure 12, this drilling rod lower end connects the joint 8 and the disposable drill bit 9 of split, joint 8 has the hollow cylinder of internal thread hole 801 for top, little rank, the upper end cylinder of its underpart circular hole and drill bit joint portion ladder cylinder 901 matches, the lower surface of this joint contacts with the terrace of drill bit joint portion, has a driving part 804 on this joint at least, the corresponding site of this position and drill bit constitutes the grafting that can finish synchronous rotation, is connected with at least one helical blade 803 on the periphery of joint;
After drill bit broke away from joint, this drilling rod 7 communicated with the endoporus of joint 8 and can put the explosive of establishing exploration usefulness from the top down.
During enforcement, the gabarit of described drill bit operate portions 12 can be cone shape and see Figure 11.
Please refer to Figure 13, the pipeline of described hydraulic system hydraulic circuit 10 is configured to:
One group of three high-pressure and hydraulic oil pump B1 comprises pump B101, pump B102, pump B103, and its input connects fuel tank through oil filter B21, B22, B23 respectively, and each delivery side of pump is connected with pressure meter B2 respectively;
Wherein the output of a pump 101 is communicated with multiple directional control valve group B15 through pipeline, and the outlet that this multichannel is changed valve group B15 connects compression motor B8 through pipeline, and another outlet connects unit head motor B13 through pipeline;
The output of another pump 102 connects multiple directional control valve group B7 through pipeline, the output of one of this reversal valve group B7 connects derrick lift ram B12 by the road, on the pipeline of this oil cylinder B12, be provided with one-way damper valve B14, two outputs in addition of this reversal valve group B7 connect two rear support leg oil cylinder B24 respectively through pipeline, this oil cylinder B24 advances, go out pipeline and be provided with bidirectional hydraulic lock B9, another output of this reversal valve group B7 connects two derricks through pipeline and moves oil cylinder B10, this oil cylinder B10 advances, go out pipeline and be provided with bidirectional hydraulic lock B9, another output of this reversal valve group B7 connects compression motor B8 through pipeline;
The output of another pump 103 connects hydraulic oil cooler assembly B17 and overflow valve B3 respectively through pipeline, and the loop of this cooler is communicated with fuel tank through oil filter B18.
During enforcement, described hydraulic oil pump B1 uses railroad traction, is driven through transmission mechanism by the motor of locomotive.
Claims (7)
1. desert screw drilling machine vehicle, it on an offroad vehicle, is characterized in that derrick installation:
In the transmission mechanism of this car, behind automobile engine, speed-changing gear box, be connected with a transfer case, the output shaft of this transfer case drives front and rear wheel respectively by universal telescopic shaft and rotates simultaneously;
This car is provided with the derrick take-off and landing device, power head device, auger stem, joint, drill bit and telescopic outrigger;
Being configured to of described derrick take-off and landing device: the affixed a plate of this derrick, this junction plate lower end is articulated in a support, this support is connected in a base, this junction plate upper end is articulated in the top of an oil cylinder piston, this oil cylinder lower end is articulated in this base, the stroke of this oil cylinder limits two positions of derrick, and one is the operating position, and derrick is positioned at tail of the body perpendicular to ground; It is two for the folding and unfolding position, and derrick is positioned at the vehicle body top to be placed, by the bracket supports that is fixed in vehicle body;
Described power head device is arranged on the derrick, and this power head device can be along the slide that is provided with on the derrick, and it is contained in central tube on the unit head, this central tube lower end jointed rod joint and drilling rod by gearbox drive;
The derrick of this car rises and falls, unit head motor and telescopic outrigger be by the hydraulic circuit control of same hydraulic system.
2. desert screw drilling machine vehicle as claimed in claim 1 is characterized in that: being configured to of described transfer case, and this transfer case has the closed box of lid, and power shaft, jackshaft and output shaft are housed in the bearing support of this casing;
Described power shaft has overhanging end to connect the automobile gear gearbox, circumferentially be fixed with a shift fork cover at the middle part of this power shaft, this shift fork overlaps when moving axially to the right left respectively with before the gear coupling interlock, backgear, before being somebody's turn to do, the backgear kink is on this power shaft, before being somebody's turn to do, back kink gear respectively be fixed on the jackshaft before, back fixed gear engagement, front gear on this jackshaft and the engagement of the fixed gear on the output shaft, before this output shaft has, back overhanging end is protruding from the housing bearing seat of transfer case, its overhanging end forward drives front axle through universal telescopic shaft, and its overhanging end backward connects trailing wheel differential gear train assembly through universal telescopic shaft.
3. desert screw drilling machine vehicle as claimed in claim 1 is characterized in that: described derrick is contained on the translating device, and it is configured to:
The base that bearing and oil cylinder connected of this derrick take-off and landing device is for can move horizontally base, this base connects drilling machine platform with slide rail, this drilling machine platform is fixed in vehicle body, and an end hinged of this movable base moves oil cylinder, and this moves oil cylinder and holds the seat hinged securement in the bearing of drilling machine platform in addition.
4. desert screw drilling machine vehicle as claimed in claim 1, it is characterized in that: the drilling rod that described unit head lower end connects is an auger stem, this drilling rod is for placing the hollow tube of explosive, its shaft cylindrical is provided with flight, these shaft two ends are respectively arranged with female adapter and male connection, and this nipple place is provided with the shackle muscle;
This drilling rod lower end connects the joint and the disposable drill bit of split, joint is the hollow cylinder that internal thread hole is arranged at top, little rank, the upper end cylinder of its underpart circular hole and drill bit joint portion ladder cylinder matches, the lower surface of this joint contacts with the terrace of drill bit joint portion, this joint is provided with at least one driving part, is connected with at least one helical blade on the periphery of joint;
Drill bit is made up of the joint portion and the operate portions of disjunctor, and the joint portion is up-small and down-big ladder cylinder, and the cylindrical center of this ladder is for there being end circular hole; There is drill lip on the surface of its operate portions, has a position that is used to drive on drill bit at least; The corresponding site of this position and joint constitutes the grafting that can finish synchronous rotation;
After drill bit broke away from joint, this drilling rod communicated with the endoporus of joint and can put from the top down and establish explosive.
5. desert screw drilling machine vehicle as claimed in claim 4 is characterized in that: the gabarit of described drill bit operate portions is cone shape.
6. desert screw drilling machine vehicle as claimed in claim 1 is characterized in that: the pipeline of described hydraulic system hydraulic circuit is configured to:
One group of three high-pressure and hydraulic oil pump (B1) comprises pump (B101), pump (B102), pump (B103), and its input connects fuel tank through oil filter (B21), (B22), (B23) respectively, and each delivery side of pump is connected with pressure meter (B2) respectively;
Wherein the output of a pump (101) is communicated with multiple directional control valve group (B15) through pipeline, and the outlet that this multichannel is changed valve group (B15) connects compression motor (B8) through pipeline, and another outlet connects unit head motor (B13) through pipeline;
The output of another pump (102) connects multiple directional control valve group (B7) through pipeline, the output of one of this reversal valve group (B7) connects derrick lift ram (B12) by the road, on the pipeline of this oil cylinder (B12), be provided with one-way damper valve (B14), two outputs in addition of this reversal valve group (B7) connect two rear support leg oil cylinders (B24) respectively through pipeline, this oil cylinder (B24) advances, go out pipeline and be provided with bidirectional hydraulic lock (B9), another output of this reversal valve group (B7) connects two derricks through pipeline and moves oil cylinder (B10), this oil cylinder (B10) advances, go out pipeline and be provided with bidirectional hydraulic lock (B9), another output of this reversal valve group (B7) connects compression motor (B8) through pipeline;
The output of another pump (103) connects hydraulic oil cooler assembly (B17) and overflow valve (B3) respectively through pipeline, and the loop of this cooler is communicated with fuel tank through oil filter (B18).
7. desert screw drilling machine vehicle as claimed in claim 6 is characterized in that: described hydraulic oil pump (B1) is driven through transmission mechanism by the motor of locomotive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274748 CN2522597Y (en) | 2001-12-28 | 2001-12-28 | Desert auger drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274748 CN2522597Y (en) | 2001-12-28 | 2001-12-28 | Desert auger drilling rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2522597Y true CN2522597Y (en) | 2002-11-27 |
Family
ID=33679313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01274748 Expired - Lifetime CN2522597Y (en) | 2001-12-28 | 2001-12-28 | Desert auger drilling rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2522597Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704837A (en) * | 2012-05-30 | 2012-10-03 | 河南省水利勘测有限公司 | Shallow hole drilling machine |
-
2001
- 2001-12-28 CN CN 01274748 patent/CN2522597Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704837A (en) * | 2012-05-30 | 2012-10-03 | 河南省水利勘测有限公司 | Shallow hole drilling machine |
| CN102704837B (en) * | 2012-05-30 | 2014-09-17 | 河南省水利勘测有限公司 | Shallow hole drilling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA PETROLEUM GROUP CO., GEOPHYSICAL EXPLORATION Free format text: FORMER NAME OR ADDRESS: GEOPHYSICAL PROSPECTING BUREAU, CHINA PETROLEUM GROUP |
|
| CP03 | Change of name, title or address |
Address after: 072751, Shao Yongmei, 11, mailbox, science and information, Zhuozhou, Hebei Province Patentee after: China Petroleum Group Dongfang Geophysical Exploration Bureau Co Ltd Address before: 072750 Hebei Province, Zhuozhou City Fan Yang Road, No. 65 Patentee before: Geophysical Exploration Bureau, China Petroleum Group |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050914 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |