CN203515414U - Claw sleeve type anchor device - Google Patents
Claw sleeve type anchor device Download PDFInfo
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- CN203515414U CN203515414U CN201320576031.2U CN201320576031U CN203515414U CN 203515414 U CN203515414 U CN 203515414U CN 201320576031 U CN201320576031 U CN 201320576031U CN 203515414 U CN203515414 U CN 203515414U
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- slips
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- central tube
- sleeve
- grappling
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Abstract
The utility model relates to the technical field of anchor devices used for well cementing and completion in oil and gas fields, and provides a claw sleeve type anchor device. The claw sleeve type anchor device comprises a center cylinder, an upper spacer sleeve, an anchor device body, a positioning claw sleeve, an anchor shear pin and a hydraulic driving device; the upper spacer sleeve is fixedly installed on the outer side of the upper portion of the center cylinder; the positioning claw sleeve is fixed to the outer side of the middle of the center cylinder through the anchor shear pin; at least two open grooves are distributed in the lower periphery of the side wall of the positioning claw sleeve. The claw sleeve type anchor device is reasonable and compact in structure and convenient to use; a boss positioning block is arranged on the positioning claw sleeve, an outer cylinder is arranged outside a pressure building cylinder, as a result, limiting protection of the positioning claw sleeve and the pressure building cylinder can be realized, the adaptability of the anchor device to various well conditions and the reliability of the anchor device are improved, and it is avoided that the anchor device is anchored in advance; the outer side of the upper portion of the positioning claw sleeve is in the shape of a narrow-end-up frustum which is matched with the inner side of the lower portion of a slip, so that the slip is pushed to extend in the radial direction, teeth-shaped protrusions of the slip are embedded into the wall of a well, and a good anchoring effect is achieved.
Description
Technical field
the utility model relates to the anchoring device technical field that the solid completion practice of oil gas field is used, and is a kind of pawl shell type anchoring device.
Background technology
in the work progresss such as oilfield well completion, well workover, stimulation work, often need to use anchoring device by tubing string grappling, position orientation, and often there is the problem of the following aspects in conventional anchoring device: 1. complex structure, the various processing cost that causes of parts are high; 2. reliability is not high, may be due to the abnormal situation that occurs grappling in advance in down-hole.
Summary of the invention
the utility model provides a kind of pawl shell type anchoring device, has overcome the deficiency of above-mentioned prior art, the problem that it can effectively solve existing anchoring device poor reliability, easily shift to an earlier date grappling.
the technical solution of the utility model realizes by following measures: a kind of pawl shell type anchoring device, comprise central tube, upper interstage sleeve, anchoring device, locating detent cover, grappling shear pin and fluid pressure drive device, the upper outside of central tube is installed with interstage sleeve; The outside, middle part of central tube is fixed with locating detent cover by grappling shear pin; The lower circumference of locating detent cover sidewall is distributed with the open slot that is no less than two, the bottom of locating detent cover is separated into the location calvus identical with open slot quantity by open slot, the inside and outside both sides, bottom of each location calvus are all fixed with boss locating piece, the central tube arranged outside of corresponding boss locating piece position has locating slot, and the boss locating piece of inner side is positioned at locating slot by the extruding of fluid pressure drive device; Central tube outside between upper interstage sleeve and locating detent cover be provided with can be after pressurized circumferentially extending be embedded into the anchoring device in the borehole wall; Thereby the lower outside of central tube is fixed with and can promotes the up fluid pressure drive device that struts anchoring device and can push and unclamp boss locating piece of locating detent cover; The top and bottom of central tube are respectively arranged with internal thread or external screw thread.
the further optimization and/or improvements to above-mentioned utility model technical scheme below:
above-mentioned fluid pressure drive device can comprise build the pressure cylinder and urceolus, build the pressure cylinder upper inner be provided with interior ring platform, the cylinder that builds the pressure is fixed on the lower outside of central tube by being positioned at the cylindrical shell shear pin of Huan Tai position, an inner side, upper end that builds the pressure for corresponding boss locating piece position is provided with the positioning boss that is pressed on boss locating piece and is positioned at ring platform top, build the pressure cylinder outside be set with urceolus, bottom and the central tube of urceolus are fixed together; There is the first boss that is positioned at the cylinder top that builds the pressure in the outside, locating detent cover middle part of corresponding open slot top position, and packing element shear pin is positioned at the middle part of the first boss, and the top of urceolus is sleeved on the first boss outside; Be positioned at and on the central tube of cylindrical shell shear pin below and the cylinder that builds the pressure, be respectively arranged with the central tube inlet opening that can interconnect and an inlet opening that builds the pressure; The lower inside of urceolus has a joint ring platform that is positioned at the cylinder below of building the pressure, and between between build the pressure cylinder outside and the urceolus inner side between the interior ring platform and central tube above central tube inlet opening, above an inlet opening that building the pressure, outside joint ring platform inner side and central tube, is provided with sealing ring.
the above-mentioned lower outside that builds the pressure cylinder can be provided with the groove that builds the pressure that is positioned at cylindrical shell shear pin below.
can there be fixed cover in the above-mentioned central tube outside that is positioned at the cylinder below that builds the pressure, the lower outside of urceolus and the upper inner of fixed cover are threaded connection and are fixed together, the lower inside of fixed cover is provided with the inner convex platform that is sleeved on central tube outside, is provided with inner side and is fixed on the spacing ring on central tube lateral wall between the bottom of urceolus and the top of inner convex platform.
between the lower inside of the above-mentioned cylinder that builds the pressure and central tube outside, can be provided with lock ring, build the pressure and be threaded connection and be fixed together outside lower inside and the lock ring of cylinder, on lock ring, there is axially open, in axially open, be provided with at least one inside and be fixed on the anti-rotation nail on central tube, on the inwall of lock ring, be distributed with retaining pawl, the central tube arranged outside of moving travel position on corresponding lock ring has the cylindrical shell pawl matching with retaining pawl.
above-mentioned anchoring device can comprise slips sleeve and slips; The upper inner of slips sleeve and the lower outside of upper interstage sleeve are fixedly installed togather, and the bottom of slips sleeve is sleeved on the upper outside of locating detent cover, and the lower end seat of slips sleeve is in urceolus top; The grappling through hole row of circumference uniform distribution at least two row on slips sleeve, every row grappling through hole row include at least two spaced grappling through holes from top to bottom; The arranged outside of the central tube of corresponding slips sleeve position has the slips mounting groove that quantity is identical with grappling through hole row columns, in each slips mounting groove, is provided with the slips that is positioned at slips sleeve; The outside of the slips of corresponding grappling lead to the hole site is distributed with transversely arranged dentation, between the adjacent dentation of same column, is provided with radial groove; The lower inside of slips is up-narrow and down-wide taper type, and the upper outside of locating detent cover is the up-narrow and down-wide taper type matching with slips lower inside, and the top of locating detent cover penetrates slips sleeve and is positioned at the lower inside of slips.
the quantity of above-mentioned grappling through hole row can be four row, and every row grappling through hole row all have two grappling through holes.
the utility model reasonable and compact in structure; easy to use; it arranges boss locating piece by putting at locating detent, and outside the cylinder that builds the pressure, urceolus is set, and can realize the position limitation protection to locating detent cover and the cylinder that builds the pressure; improve it to the compliance of various hole conditions and reliability; avoid it to shift to an earlier date grappling, the upper outside of locating detent cover is the up-narrow and down-wide taper type matching with slips lower inside, thereby promotes slips circumferentially extending; make its dentation embed the borehole wall inner, there is good anchoring effect.
Accompanying drawing explanation
accompanying drawing 1 is looked half section structural representation for the master of the utility model most preferred embodiment.
accompanying drawing 2 is that accompanying drawing 1 is at the local structure for amplifying schematic diagram at D place.
accompanying drawing 3 is analysed and observe structure for amplifying schematic diagram at A-A place for accompanying drawing 1.
accompanying drawing 4 is analysed and observe structure for amplifying schematic diagram at B-B place for accompanying drawing 1.
coding in accompanying drawing is respectively: cylinder centered by 1, 2 is upper interstage sleeve, 3 is locating detent cover, 4 is boss locating piece, 5 is grappling shear pin, 6 is open slot, 7 is locating slot, 8 is the cylinder that builds the pressure, 9 is urceolus, 10 is cylindrical shell shear pin, 11 is positioning boss, cylinder inlet opening centered by 12, 13 is an inlet opening that builds the pressure, 14 is sealing ring, 15 is interior ring platform, 16 is fixed cover, 17 is inner convex platform, 18 is spacing ring, 19 is lock ring, 20 is axially open, 21 is anti-rotation nail, 22 is slips sleeve, 23 is slips, 24 is grappling through hole, 25 is slips mounting groove, 26 is dentation, 27 is radial groove, 28 is location calvus, 29 is the groove that builds the pressure.
The specific embodiment
the utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in accompanying drawing 1,2,3,4, this pawl shell type anchoring device comprises central tube 1, upper interstage sleeve 2, anchoring device, locating detent cover 3, grappling shear pin 5 and fluid pressure drive device, and the upper outside of central tube 1 is installed with interstage sleeve 2; The outside, middle part of central tube 1 is fixed with locating detent cover 3 by grappling shear pin 5; The lower circumference that locating detent overlaps 3 sidewalls is distributed with the open slot 6 that is no less than two, the bottom of locating detent cover 3 is separated into the location calvus 28 identical with open slot 6 quantity by open slot 6, the inside and outside both sides, bottom of each location calvus 28 are all fixed with boss locating piece 4, central tube 1 arranged outside of corresponding boss locating piece 4 positions has locating slot 7, and the boss locating piece 4 of inner side is positioned at locating slot 7 by the extruding of fluid pressure drive device; Central tube 1 outside between upper interstage sleeve 2 and locating detent cover 3 be provided with can be after pressurized circumferentially extending be embedded into the anchoring device in the borehole wall; Thereby the lower outside of central tube 1 is fixed with and can promotes locating detent and overlap the 3 up fluid pressure drive devices that strut anchoring device and can push and unclamp boss locating piece 4; The top and bottom of central tube 1 are respectively arranged with internal thread or external screw thread.In use, by the building the pressure of fluid pressure drive device, thereby promote locating detent, overlap 3 up extruding anchoring devices, thus circumferentially extending be embedded into the interior grappling process that realizes of the borehole wall after anchoring device pressurized; In this process, by boss locating piece 4, embed the position-limiting action of the interior formation of locating slot 7 to locating detent cover 3, can avoid its in the process of G.I.H because external force shifts to an earlier date grappling, thereby improve the reliability of its grappling, by the operation that builds the pressure, make to move and strut anchoring device on Pressure Actuated Device and realize grappling, convenient and swift.
can according to actual needs, above-mentioned pawl shell type anchoring device be made further optimization and/or improvements:
as shown in accompanying drawing 1,2,3,4, fluid pressure drive device comprises build the pressure cylinder 8 and urceolus 9, cylinder 8 the upper inner that builds the pressure is provided with interior ring platform 15, the cylinder 8 that builds the pressure is fixed on the lower outside of central tube 1 by being positioned at the cylindrical shell shear pin 10 of ring platform 15 positions, cylinder 8 inner sides, upper end that build the pressure of corresponding boss locating piece 4 positions are provided with the positioning boss 11 that is pressed on boss locating piece 4 and is positioned at ring platform 15 tops, cylinder 8 the outside that builds the pressure is set with urceolus 9, and the bottom of urceolus 9 and central tube 1 are fixed together; The locating detent of corresponding open slot 6 top positions overlaps 3 outsides, middle part the first boss that is positioned at cylinder 8 tops that build the pressure, and packing element shear pin 5 is positioned at the middle part of the first boss, and the top of urceolus 9 is sleeved on the first boss outside; Be positioned on the central tube 1 of cylindrical shell shear pin 10 belows and the cylinder 8 that builds the pressure and be respectively arranged with the central tube inlet opening 12 that can interconnect and the inlet opening 13 that builds the pressure; The lower inside of urceolus 9 has the joint ring platform that is positioned at cylinder 8 belows that build the pressure, building the pressure between cylinder 8 outsides and urceolus 9 inner sides, be provided with sealing ring 14 between inside joint ring platform and central tube 1 outside between the interior ring platform 15 and central tube 1 above central tube inlet opening 12, above the inlet opening 13 that building the pressure.Urceolus 9 is set, can realizes cylinder 8 the protection that builds the pressure, avoid building the pressure cylinder 8 in the process of G.I.H because external force moves, thereby guarantee its positioning action to locating hole.The gap surrounding between sealing ring 14 and urceolus 9 inner sides and central tube 1 outside will form hydraulic cavities, in use, high-pressure fluid enters in hydraulic cavities by central tube inlet opening 12 and the inlet opening 13 that builds the pressure successively, liquid in hydraulic cavities reaches after certain pressure, the cylinder 8 that builds the pressure will be subject to thrust upwards, thereby cutting off cylindrical shell shear pin 10 starts up, when positioning boss 11 moves to boss locating piece 4 top, the extruding force being subject to due to location calvus 30 disappears, boss locating piece 4 will become flexible, cause locating detent cover 3 can cut off grappling shear pin 5 when being subject to building the pressure the thrust of cylinder 8, and up under the effect of the cylinder 8 that builds the pressure, thereby strut anchoring device.
as shown in Figure 1, cylinder 8 the lower outside that builds the pressure is provided with the groove 29 that builds the pressure that is positioned at cylindrical shell shear pin 10 belows.The groove 29 that builds the pressure can make to build the pressure cylinder 8 outsides at this position formation step, can be convenient to thus high-pressure fluid by central tube inlet opening 12 and rear the exerting pressure to cylindrical shell shear pin 10 of an inlet opening 13 that build the pressure.
as shown in Figure 1, there is fixed cover 16 in central tube 1 outside that is positioned at cylinder 8 belows that build the pressure, the upper inner of the lower outside of urceolus 9 and fixed cover 16 is threaded connection and is fixed together, the lower inside of fixed cover 16 is provided with the inner convex platform 17 that is sleeved on central tube 1 outside, is provided with inner side and is fixed on the spacing ring 18 on central tube 1 lateral wall between the bottom of urceolus 9 and the top of inner convex platform 17.
as shown in accompanying drawing 1,4, build the pressure and be provided with lock ring 19 between cylinder 8 lower inside and central tube 1 outside, build the pressure cylinder 8 lower inside and lock ring 19 outsides are threaded connection and are fixed together, on lock ring 19, there is axially open 20, in axially open 20, be provided with at least one inside and be fixed on the anti-rotation nail 21 on central tube 1, on the inwall of lock ring 19, be distributed with retaining pawl, central tube 1 arranged outside of moving travel position on corresponding lock ring 19 has the cylindrical shell pawl matching with retaining pawl.Being used in conjunction with of retaining pawl and cylindrical shell pawl, can guarantee that it can continue grappling after pin is cut off, and is not subject to the interference of other external force in well.
as shown in Figure 1, anchoring device can comprise slips sleeve 22 and slips 23; The lower outside of the upper inner of slips sleeve 22 and upper interstage sleeve 2 is fixedly installed togather, and the bottom of slips sleeve 22 is sleeved on the upper outside of locating detent cover 3, and the lower end seat of slips sleeve 22 is in urceolus 9 tops; The grappling through hole row of circumference uniform distribution at least two row on slips sleeve 22, every row grappling through hole row include at least two spaced grappling through holes 24 from top to bottom; The arranged outside of the central tube 1 of corresponding slips sleeve 22 positions has the slips mounting groove 25 that quantity is identical with grappling through hole row columns, is provided with the slips 23 that is positioned at slips sleeve 22 in each slips mounting groove 25; The outside of the slips 23 of corresponding grappling through hole 24 positions is distributed with transversely arranged dentation 26, between the adjacent dentation 26 of same column, is provided with radial groove 27; The lower inside of slips 23 is up-narrow and down-wide taper type, and the upper outside of locating detent cover 3 is the up-narrow and down-wide taper type matching with slips 23 lower inside, and the top of locating detent cover 3 penetrates slips sleeve 22 and is positioned at the lower inside of slips 23.In use, locating detent cover 3 is subject to after thrust that fluid pressure drive device makes progress, to cut off grappling shear pin 5 continues up, because the lower inside of its upper outside and slips 23 is all up-narrow and down-wide taper type, it will promote slips 23 and radially outwards stretch, now dentation 26 leans out in slips 23 covers and is embedded in the borehole wall through grappling through hole 24, realizes its anchoring effect; In this process, the bottom of radial groove 27 will be stuck in slips sleeve 22 inner sides between the adjacent grappling through hole 24 of same column, and the degree of depth of radial groove 27 will affect the size of stretching out of dentation 26; According to demand, anchoring device also can adopt existing known technology.
as shown in Figure 1, the quantity of grappling through hole row is four row, and every row grappling through hole row all have two grappling through holes 24.
above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
Claims (10)
1. a pawl shell type anchoring device, is characterized in that comprising central tube, upper interstage sleeve, anchoring device, locating detent cover, grappling shear pin and fluid pressure drive device, and the upper outside of central tube is installed with interstage sleeve; The outside, middle part of central tube is fixed with locating detent cover by grappling shear pin; The lower circumference of locating detent cover sidewall is distributed with the open slot that is no less than two, the bottom of locating detent cover is separated into the location calvus identical with open slot quantity by open slot, the inside and outside both sides, bottom of each location calvus are all fixed with boss locating piece, the central tube arranged outside of corresponding boss locating piece position has locating slot, and the boss locating piece of inner side is positioned at locating slot by the extruding of fluid pressure drive device; Central tube outside between upper interstage sleeve and locating detent cover be provided with can be after pressurized circumferentially extending be embedded into the anchoring device in the borehole wall; Thereby the lower outside of central tube is fixed with and can promotes the up fluid pressure drive device that struts anchoring device and can push and unclamp boss locating piece of locating detent cover; The top and bottom of central tube are respectively arranged with internal thread or external screw thread.
2. pawl shell type anchoring device according to claim 1, it is characterized in that fluid pressure drive device comprises build the pressure cylinder and urceolus, build the pressure cylinder upper inner be provided with interior ring platform, the cylinder that builds the pressure is fixed on the lower outside of central tube by being positioned at the cylindrical shell shear pin of Huan Tai position, an inner side, upper end that builds the pressure for corresponding boss locating piece position is provided with the positioning boss that is pressed on boss locating piece and is positioned at ring platform top, build the pressure cylinder outside be set with urceolus, bottom and the central tube of urceolus are fixed together; There is the first boss that is positioned at the cylinder top that builds the pressure in the outside, locating detent cover middle part of corresponding open slot top position, and packing element shear pin is positioned at the middle part of the first boss, and the top of urceolus is sleeved on the first boss outside; Be positioned at and on the central tube of cylindrical shell shear pin below and the cylinder that builds the pressure, be respectively arranged with the central tube inlet opening that can interconnect and an inlet opening that builds the pressure; The lower inside of urceolus has a joint ring platform that is positioned at the cylinder below of building the pressure, and between between build the pressure cylinder outside and the urceolus inner side between the interior ring platform and central tube above central tube inlet opening, above an inlet opening that building the pressure, outside joint ring platform inner side and central tube, is provided with sealing ring.
3. pawl shell type anchoring device according to claim 2, the lower outside of the cylinder that it is characterized in that building the pressure is provided with the groove that builds the pressure that is positioned at cylindrical shell shear pin below.
4. according to the pawl shell type anchoring device described in claim 2 or 3, it is characterized in that being positioned at the build the pressure central tube outside of cylinder below and have fixed cover, the lower outside of urceolus and the upper inner of fixed cover are threaded connection and are fixed together, the lower inside of fixed cover is provided with the inner convex platform that is sleeved on central tube outside, is provided with inner side and is fixed on the spacing ring on central tube lateral wall between the bottom of urceolus and the top of inner convex platform.
5. according to the pawl shell type anchoring device described in claim 2 or 3, between it is characterized in that building the pressure outside lower inside and the central tube of cylinder, be provided with lock ring, build the pressure and be threaded connection and be fixed together outside lower inside and the lock ring of cylinder, on lock ring, there is axially open, in axially open, be provided with at least one inside and be fixed on the anti-rotation nail on central tube, on the inwall of lock ring, be distributed with retaining pawl, the central tube arranged outside of moving travel position on corresponding lock ring has the cylindrical shell pawl matching with retaining pawl.
6. pawl shell type anchoring device according to claim 4, between it is characterized in that building the pressure outside lower inside and the central tube of cylinder, be provided with lock ring, build the pressure and be threaded connection and be fixed together outside lower inside and the lock ring of cylinder, on lock ring, there is axially open, in axially open, be provided with at least one inside and be fixed on the anti-rotation nail on central tube, on the inwall of lock ring, be distributed with retaining pawl, the central tube arranged outside of moving travel position on corresponding lock ring has the cylindrical shell pawl matching with retaining pawl.
7. according to the pawl shell type anchoring device described in claim 2 or 3, it is characterized in that anchoring device comprises slips sleeve and slips; The upper inner of slips sleeve and the lower outside of upper interstage sleeve are fixedly installed togather, and the bottom of slips sleeve is sleeved on the upper outside of locating detent cover, and the lower end seat of slips sleeve is in urceolus top; The grappling through hole row of circumference uniform distribution at least two row on slips sleeve, every row grappling through hole row include at least two spaced grappling through holes from top to bottom; The arranged outside of the central tube of corresponding slips sleeve position has the slips mounting groove that quantity is identical with grappling through hole row columns, in each slips mounting groove, is provided with the slips that is positioned at slips sleeve; The outside of the slips of corresponding grappling lead to the hole site is distributed with transversely arranged dentation, between the adjacent dentation of same column, is provided with radial groove; The lower inside of slips is up-narrow and down-wide taper type, and the upper outside of locating detent cover is the up-narrow and down-wide taper type matching with slips lower inside, and the top of locating detent cover penetrates slips sleeve and is positioned at the lower inside of slips.
8. pawl shell type anchoring device according to claim 4, is characterized in that anchoring device comprises slips sleeve and slips; The upper inner of slips sleeve and the lower outside of upper interstage sleeve are fixedly installed togather, and the bottom of slips sleeve is sleeved on the upper outside of locating detent cover, and the lower end seat of slips sleeve is in urceolus top; The grappling through hole row of circumference uniform distribution at least two row on slips sleeve, every row grappling through hole row include at least two spaced grappling through holes from top to bottom; The arranged outside of the central tube of corresponding slips sleeve position has the slips mounting groove that quantity is identical with grappling through hole row columns, in each slips mounting groove, is provided with the slips that is positioned at slips sleeve; The outside of the slips of corresponding grappling lead to the hole site is distributed with transversely arranged dentation, between the adjacent dentation of same column, is provided with radial groove; The lower inside of slips is up-narrow and down-wide taper type, and the upper outside of locating detent cover is the up-narrow and down-wide taper type matching with slips lower inside, and the top of locating detent cover penetrates slips sleeve and is positioned at the lower inside of slips.
9. pawl shell type anchoring device according to claim 5, is characterized in that anchoring device comprises slips sleeve and slips; The upper inner of slips sleeve and the lower outside of upper interstage sleeve are fixedly installed togather, and the bottom of slips sleeve is sleeved on the upper outside of locating detent cover, and the lower end seat of slips sleeve is in urceolus top; The grappling through hole row of circumference uniform distribution at least two row on slips sleeve, every row grappling through hole row include at least two spaced grappling through holes from top to bottom; The arranged outside of the central tube of corresponding slips sleeve position has the slips mounting groove that quantity is identical with grappling through hole row columns, in each slips mounting groove, is provided with the slips that is positioned at slips sleeve; The outside of the slips of corresponding grappling lead to the hole site is distributed with transversely arranged dentation, between the adjacent dentation of same column, is provided with radial groove; The lower inside of slips is up-narrow and down-wide taper type, and the upper outside of locating detent cover is the up-narrow and down-wide taper type matching with slips lower inside, and the top of locating detent cover penetrates slips sleeve and is positioned at the lower inside of slips.
10. pawl shell type anchoring device according to claim 9, is characterized in that the quantity of grappling through hole row is four row, and every row grappling through hole row all have two grappling through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320576031.2U CN203515414U (en) | 2013-09-17 | 2013-09-17 | Claw sleeve type anchor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320576031.2U CN203515414U (en) | 2013-09-17 | 2013-09-17 | Claw sleeve type anchor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515414U true CN203515414U (en) | 2014-04-02 |
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ID=50374361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320576031.2U Expired - Fee Related CN203515414U (en) | 2013-09-17 | 2013-09-17 | Claw sleeve type anchor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203515414U (en) |
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2013
- 2013-09-17 CN CN201320576031.2U patent/CN203515414U/en not_active Expired - Fee Related
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| 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: 20140402 Termination date: 20200917 |
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| CF01 | Termination of patent right due to non-payment of annual fee |