CN207177816U - Tieback inserts cementing assembly - Google Patents
Tieback inserts cementing assembly Download PDFInfo
- Publication number
- CN207177816U CN207177816U CN201720893251.6U CN201720893251U CN207177816U CN 207177816 U CN207177816 U CN 207177816U CN 201720893251 U CN201720893251 U CN 201720893251U CN 207177816 U CN207177816 U CN 207177816U
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- Prior art keywords
- borehole jack
- annular groove
- insertion tube
- cementing
- outside
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- Withdrawn - After Issue
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Abstract
It the utility model is related to tie back liner cementing technology field, it is a kind of tieback insertion cementing assembly, it includes cementing device, switch hole overcoat, perforate covers shear pin, insertion tube, interior pass borehole jack, close seat, close seat shear pin, limited block and blind guide shoe, the lower outside of cementing device is provided with upper annular groove, upper land is provided with the outside of upper annular groove upper end, the outer set upper side of switch hole is provided with borehole jack annular groove, switch hole overcoat is set with the top of upper annular groove and land is located in borehole jack annular groove, circumferentially there is at least one perforate set shear pin in the upper outside of switch hole overcoat, cementing device covers shear pin by perforate with switch hole overcoat and is fixedly installed togather.The utility model is rational in infrastructure, it is easy to use, effectively solve the problems, such as to avoid putting because sealing device failure can not carry out the subsequent construction operation such as following injected water mud after insertion tube inserts tie-back sleeve to put pipe string damage sealing device, cause seal failure, there is the characteristics of efficient and construction safety.
Description
Technical field
Tie back liner cementing technology field is the utility model is related to, is a kind of tieback insertion cementing assembly.
Background technology
, can be because on insertion drum outer wall when being cemented the well using traditional tieback insertion instrument in the construction of oil gas field drilling liner cementing
Sealing device failure, cause blow-by between insertion tube and tie-back sleeve, cause insertion tube to be inserted into steady when being built the pressure in tie-back sleeve
Incessantly press, easily occur staying the unusual service conditions such as cement plug in pipe during tie-back cementing.In order to ensure cementing operation quality, eliminate well cementation and apply
Work unusual service condition, pipe string can only be all proposed in well, change the sealing device on pipe string outer wall, then transfer pipe string and be inserted into back
In connect cylinder, subsequent construction operation is carried out after voltage stabilizing is normal in pipe inner-outer circulation and pipe again.So as to extend the engineering time and increase
The risk of construction operation, insertion tube pushes the risk that cement plug is stayed in not in place and tail pipe after the completion of being additionally present of construction, no
Increase only construction it is follow-up remedy expense, extend completion time again, have impact on cementing operation quality.
The content of the invention
The utility model provides a kind of tieback insertion cementing assembly, overcomes the deficiency of above-mentioned prior art, its energy
When effectively solving existing traditional tieback insertion instrument well cementation because of sealing device failure and on put put pipe string change sealing device and
Caused by waste of material, the problem of wasting time and energy, staying cement plug in low construction efficiency, pipe.
The technical solution of the utility model is realized by following measures：A kind of tieback inserts cementing assembly, its
It is characterised by:Cut including cementing device, switch hole overcoat, perforate set shear pin, insertion tube, interior pass borehole jack, closing seat, closing seat
Nail, limited block and blind guide shoe, the lower outside of cementing device are provided with upper annular groove, upper land are provided with the outside of upper annular groove upper end, is opened
Close set upper side outside hole and be provided with borehole jack annular groove, switch hole overcoat is set with the top of upper annular groove and upper land is located at borehole jack annular groove
It is interior, circumferentially there are at least one perforate set shear pin, cementing device and switch hole overcoat in the upper outside of switch hole overcoat
Shear pin is covered by perforate to be fixedly installed togather, the lower outside of upper annular groove and the upper inner of insertion tube are fixedly mounted on one
Rise, compression spring is installed in the upper annular groove between switch hole overcoat and insertion tube；Sealing dress is provided with insertion drum outer wall
Put, inner groove is provided with insertion tube lower inside, interior pass borehole jack can be moved down by being set with inner groove, in interior pass borehole jack top
The cavity of side is provided with closing seat that can be descending, closes the cavity that seat is fixed on interior pass borehole jack upper inner by closing seat shear pin
Interior, provided with that can make interior pass borehole jack, with its descending inner card cage, closing seat is interior to be provided with the passage for putting into the ball that builds the pressure on the outside of closing seat；It is interior
Annular groove upper inner is provided with and internally closes the spacing limited block of the descending progress of borehole jack, circumferentially divides at least provided with one on interior pass borehole jack
The blind hole of the vertical shape of cloth, blind hole is interior to be provided with bearing pin, and it is recessed that interior pass borehole jack top is provided with a borehole jack above blind via bottom
Groove, corresponded in insertion tube inside middle portion and exterior bayonet slot is provided with borehole jack groove location, outer end is installed in borehole jack groove and is located at wild card
Limited block in groove；Interior pass borehole jack lower inside is provided with borehole jack land, is provided with the outside of interior pass borehole jack and internally closes the descending progress of borehole jack
The positioner of positioning；The upper circulation port of at least one inside and outside insertion, insertion tube middle part edge are circumferentially arranged at upper land bottom
Circle distribution has the lower circulation port of at least one inside and outside insertion, closes borehole jack bottom inside and is provided with least one circumferential hole
Circulation port is covered, borehole jack circulation port is corresponding with lower circulation hole site, and insertion tube bottom is installed with blind guide shoe.
Here is the further optimization and/or improvements to above-mentioned utility model technical scheme：
Above-mentioned positioner may include positioning screw and lock ring, closes be provided with screw locating slot on the outside of the middle part of borehole jack inside,
Outside is installed with least one positioning screw being uniformly distributed along the circumference in the middle part of insertion tube, and the inner of positioning screw is located at screw
In locating slot, the interior pass borehole jack lower outside below lower circulation port is provided with set annular groove, and lock ring, insertion tube are provided with set annular groove
Lower inside is provided with the cylinder annular groove below set annular groove.
Above-mentioned sealing device can be rectangular seal, lower annular groove is provided with the outer wall of insertion tube, on the top of lower annular groove
Outside, which is located above lower circulation port, is provided with the first outer land, and it is close that at least one rectangle being vertically arranged is provided with the first outer land
Seal, it is located in the lower end outside of lower annular groove below lower circulation port and is provided with the second outer land, is provided with least in the second outer land
One rectangular seal being vertically arranged.
It is provided between above-mentioned corresponding switch sleeve shear pin and upper circulation port between the cementing device and switch hole overcoat of position
At least one O-ring seal, at least one is provided between the cementing device and switch hole overcoat of circulation port lower position in correspondence
Individual O-ring seal, at least one O-ring seal is installed between the closing seat of corresponding inner card cage top position and interior pass borehole jack,
At least one O-ring seal is installed between the interior pass borehole jack of position and insertion tube between corresponding exterior bayonet slot and screw locating slot,
At least one O-shaped sealing is installed between the interior pass borehole jack of position and insertion tube between corresponding screw locating slot and borehole jack circulation port
Circle, at least one O-ring seal is installed between the interior pass borehole jack of position and insertion tube between circulation port and lock ring under corresponding.
The upper end of above-mentioned insertion tube can be threadably secured with the lower end of annular groove and be installed together.
Above-mentioned insertion tube lower end can be threadably secured with blind guide shoe and be installed together.
The utility model is rational in infrastructure, easy to use, effectively solves after insertion tube inserts tie-back sleeve due to sealing device
The problem of failure can not carry out the subsequent construction operation such as following injected water mud, avoid putting and put pipe string replacing sealing device, have
The characteristics of efficiently and safe.
Brief description of the drawings
Accompanying drawing 1 is the main view half section schematic of the best embodiment of the utility model.
Accompanying drawing 2 is partial enlargement cross section structure diagram at the C of accompanying drawing 1.
Accompanying drawing 3 is enlarged section structural representation at the A-A of accompanying drawing 1.
Accompanying drawing 4 is enlarged section structural representation at the B-B of accompanying drawing 1.
Coding in accompanying drawing is respectively：1 is cementing device, and 2 be switch hole overcoat, and 3 be that perforate covers shear pin, and 4 be insertion tube,
5 be interior pass borehole jack, and 6 is close seat, and 7 is close seat shear pin, and 8 be limited block, and 9 be blind guide shoe, and 10 be upper annular groove, and 11 be upper ring
Platform, 12 be borehole jack annular groove, and 13 be compression spring, and 14 be inner groove, and 15 be inner card cage, and 16 be the ball that builds the pressure, and 17 be bearing pin, and 18 be hole
Groove is covered, 19 be exterior bayonet slot, and 20 be borehole jack land, and 21 be upper circulation port, and 22 be lower circulation port, and 23 be borehole jack circulation port, and 24 are
Positioning screw, 25 be lock ring, and 26 be screw locating slot, and 27 be set annular groove, and 28 be cylinder annular groove, and 29 be rectangular seal, under 30 are
Annular groove, 31 be the first outer land, and 32 be the second outer land, and 33 be O-ring seal.
Embodiment
The utility model is not limited by following embodiments, can according to the technical solution of the utility model and actual conditions come
Determine specific embodiment.
In the utility model, for the ease of description, the description of the relative position relation of each part is according to specification
The Butut mode of accompanying drawing 1 is described, such as：The position relationship of forward and backward, upper and lower, left and right etc. is according to Figure of description
Butut direction determine.
The utility model is further described with reference to embodiment and accompanying drawing：
As shown in accompanying drawing 1,2,3,4, tieback insertion cementing assembly includes cementing device 1, switch hole overcoat 2, perforate
Shear pin 3, insertion tube 4 are covered, interior pass borehole jack 5, seat 6 is closed, closes seat shear pin 7, limited block 8 and blind guide shoe 9, under cementing device 1
Upper annular groove 10 is provided with the outside of portion, upper land 11 is provided with the outside of the upper upper end of annular groove 10, the upper end of switch hole overcoat 2 is provided with borehole jack annular groove
12, switch hole overcoat 2 is set with the top of upper annular groove 10 and upper land 11 is located in borehole jack annular groove 12, in switch hole overcoat 2
Upper outside circumferentially have at least one perforate set shear pin 3, cementing device 1 is cut with switch hole overcoat 2 by perforate set
Nail 3 is fixedly installed togather, and the lower outside and the upper inner of insertion tube 4 of upper annular groove 10 are fixedly installed togather, and are switching
Compression spring 13 is installed in upper annular groove 10 between hole overcoat 2 and insertion tube 4；Sealing device is provided with the outer wall of insertion tube 4,
Inner groove 14 is provided with the lower inside of insertion tube 4, interior pass borehole jack 5 can be moved down by being set with inner groove 14, on interior pass borehole jack 5
Cavity on the inside of portion is provided with closing seat 6 that can be descending, closes seat 6 and is fixed on by closing seat shear pin 7 in the interior pass top of borehole jack 5
In the cavity of side, closing the outside of seat 6 and being provided with can make interior pass borehole jack 5 close in seat 6 and be suppressed provided with input with its descending inner card cage 15
The passage of pressure ball 16；The upper inner of inner groove 14 is provided with and internally closes the spacing limited block 8 of the descending progress of borehole jack 5, on interior pass borehole jack 5
At least provided with the blind hole of a circumferential vertical shape, bearing pin 17 is provided with blind hole, the interior pass top of borehole jack 5 is provided with a position
Borehole jack groove 18 above blind via bottom, correspond to the opening position of borehole jack groove 18 in the inside middle portion of insertion tube 4 and be provided with exterior bayonet slot 19,
The limited block 8 that outer end is located in exterior bayonet slot is installed in borehole jack groove 18；The interior pass lower inside of borehole jack 5 is provided with borehole jack land 20,
The interior outside of pass borehole jack 5, which is provided with, internally closes the descending positioner positioned of borehole jack 5；The upper bottom of land 11 circumferentially have to
Circumferentially there is the lower circulation port of at least one inside and outside insertion at the upper circulation port 21 penetrated inside and outside few one, the middle part of insertion tube 4
22, the bottom of borehole jack 5 is closed inside is provided with least one circumferential borehole jack circulation port 23, borehole jack circulation port 23 and lower circulation port
22 positions are corresponding, and the bottom of insertion tube 4 is installed with blind guide shoe 9.In use, when tie back liner is cemented the well, will insert
Voltage stabilizing is to certain numerical value after cylinder 4 inserts in tie-back sleeves a period of time that build the pressure, if the sealing device on the outer wall of insertion tube 4 makes to insert
Enter cylinder 4 and tie-back sleeve sealing is good, continue to build the pressure and cut the external-open borehole jack shear pin 3 of cementing device 1, then switch hole overcoat 2 moves down
Circulation port 21 in opening, manage inside and outside establish and circulate, carry out the subsequent construction operations such as cementing；If occur because on the outer wall of insertion tube 4
Sealing device failure, insertion tube 4, which is inserted into when being built the pressure in tie-back sleeve, surely incessantly presses, under this operating mode, to cementing device 1
Interior to throw the ball 16 that builds the pressure, the ball 16 that builds the pressure, which enters to close in seat 6, to be built the pressure, and closes seat 6 and closing seat shear pin 7 is cut under hydraulic action
After start descending, after a descending segment distance, the outside of limited block 8 is slipped from exterior bayonet slot 19, the inner side of limited block 8 is slipped into inner card cage
After 15, interior pass borehole jack 5 release it is spacing, because the outside of limited block 8 is still located in borehole jack groove 18, in now limited block 8 will drive
Close borehole jack 5 and moved downwardly together with seat 6 is closed, when closing 6 bottom contact hole set 20 upper end of land of seat, closing seat 6 will drive
Interior pass borehole jack 5 is descending together, after a descending segment distance, it is interior close the positioner that the outside of borehole jack 5 is provided with will first make interior pass borehole jack 5 and
Close seat 6 and stop descending, now borehole jack circulation port 23 and lower circulation port 22, which are realized, misplaces, and is followed under being made by the interior pass outer wall of borehole jack 5
Annular distance 22 is closed, and makes to keep good sealing between insertion tube 4 and tie-back sleeve, continues to cut perforate set shear pin 3, switch after building the pressure
Hole overcoat 2 moves down the upper circulation port 21 of opening, manages inside and outside foundation circulation, carries out the subsequent construction operations such as cementing.The utility model
It is rational in infrastructure, it is easy to use, effectively solve after insertion tube 4 inserts tie-back sleeve because sealing device is influenceed in cementing quality and pipe
The problem of staying the subsequent construction operation such as cement plug, avoid to put and put pipe string and cause sealing device to fail, have efficiently and peace
The characteristics of complete.
A kind of above-mentioned tieback insertion cementing assembly can be made further optimization and/or improvements according to being actually needed：
As shown in accompanying drawing 1,2,3,4, positioner includes positioning screw 24 and lock ring 25, outside the middle part for closing borehole jack 5 inside
Side is provided with screw locating slot 26, and at least one positioning screw 24 being uniformly distributed along the circumference is installed with the outside of the middle part of insertion tube 4,
The inner of positioning screw 24 is located in screw locating slot 26, and the interior lower outside of pass borehole jack 5 positioned at the lower lower section of circulation port 22 is provided with
Annular groove 27 is covered, lock ring 25 is provided with set annular groove 27, the lower inside of insertion tube 4 is provided with the cylinder annular groove 28 positioned at the lower section of set annular groove 27.
In use, after closing seat 6 drives the interior pass descending segment distance of borehole jack 5, due to descending, the screw positioning of interior pass borehole jack 5
Groove 26 and the position of positioning screw 24 change, when screw locating slot 26 comes downwards to the upper end of screw locating slot 26 and positioning screw
24 contact, make it is interior pass borehole jack 5 and close seat 6 stop it is descending, at the same time, lock ring 25 also because with it is interior close borehole jack 5 it is descending from the collar
An annular groove 28 is sprung into groove 27, also make interior pass borehole jack 5 and close seat 6 stop it is descending, so as to borehole jack circulation port 23 and lower circulation port
22 realize dislocation, close lower circulation port 22 by the interior pass outer wall of borehole jack 5.
As shown in accompanying drawing 1,2, sealing device is rectangular seal 29, and lower annular groove 30 is provided with the outer wall of insertion tube 4,
The upper outside of lower annular groove 30 is provided with the first outer land 31 positioned at the lower top of circulation port 22, is provided with least in the first outer land 31
One rectangular seal 29 being vertically arranged, it is located in the lower end outside of lower annular groove 30 below lower circulation port 22 and is provided with the second outer shroud
Platform 32, at least one rectangular seal 29 being vertically arranged is provided with the second outer land 32.In use, by inserting
Enter the lower annular groove 30 that the outer wall of cylinder 4 is provided with so that insertion tube 4 is when inserting tie-back sleeve, by the upper end of lower annular groove 30 to tieback
The upper end progress of cylinder is spacing, by setting the first outer 31 and second outer land 32 of land on lower annular groove 30, and in the first outer shroud
Install rectangular seal 29 in 31 and second outer land 32 of platform additional, strengthen the sealing between insertion tube 4 and tie-back sleeve.
As shown in accompanying drawing 1,2, the cementing device 1 and switch hole of position between corresponding switch sleeve shear pin 3 and upper circulation port 21
At least one O-ring seal 33 is installed, the cementing device 1 and switch hole of the lower position of circulation port 21 in correspondence between overcoat 2
At least one O-ring seal 33 is installed between overcoat 2, the closing seat 6 of the corresponding top position of inner card cage 15 and interior pass borehole jack 5 it
Between at least one O-ring seal 33 is installed, the interior pass borehole jack 5 of position is with inserting between corresponding exterior bayonet slot 19 and screw locating slot 26
Enter and at least one O-ring seal 33 is installed between cylinder 4, position is interior between corresponding screw locating slot 26 and borehole jack circulation port 23
Close and at least one O-ring seal 33 is installed between borehole jack 5 and insertion tube 4, corresponding lower position between circulation port 22 and lock ring 25
Interior pass borehole jack 5 and insertion tube 4 between at least one O-ring seal 33 is installed.By in diverse location mounting O-shaped sealing ring
33, it is cementing device 1 and switch hole overcoat 2, closing seat 6 and interior pass borehole jack 5 in order to ensure the utility model in use
And the interior sealing closed between borehole jack 5 and insertion tube 4, so as to ensure the sealing in pipe, make pipe is inside and outside to establish circulation and insert
Enter tie-back sleeve build the pressure it is normal after, the subsequent construction operation such as cementing can be continued.
As shown in accompanying drawing 1,2, the upper end of insertion tube 4 and the lower end of annular groove are threadably secured and are installed together.Using
During, using threaded connection, facilitate insertion into the dismounting of cylinder 4 and cementing device 1.
As shown in accompanying drawing 1,2, the lower end of insertion tube 4 is threadably secured with blind guide shoe 9 and is installed together.Using process
In, using threaded connection, facilitate insertion into the dismounting of cylinder 4 and blind guide shoe 9.
Above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger adaptability and optimal implementation
Effect, can be according to the non-essential technical characteristic of increase and decrease be actually needed, to meet the needs of different situations.
Claims (10)
1. a kind of tieback inserts cementing assembly, it is characterised in that covers shear pin including cementing device, switch hole overcoat, perforate, inserts
Enter cylinder, interior pass borehole jack, closing seat, closing seat shear pin, limited block and blind guide shoe, the lower outside of cementing device and be provided with upper annular groove,
Upper land is provided with the outside of upper annular groove upper end, the outer set upper side of switch hole is provided with borehole jack annular groove, is set with out on the top of upper annular groove
Close hole overcoat and upper land is located in borehole jack annular groove, circumferentially have at least one perforate in the upper outside of switch hole overcoat
Shear pin is covered, cementing device covers shear pin by perforate with switch hole overcoat and is fixedly installed togather, and the lower outside of upper annular groove is with inserting
The upper inner for entering cylinder is fixedly installed togather, and compression bullet is provided with the upper annular groove between switch hole overcoat and insertion tube
Spring；Sealing device is provided with insertion drum outer wall, inner groove is provided with insertion tube lower inside, being set with inner groove can be downwards
Borehole jack is closed in mobile, the interior cavity for closing borehole jack upper inner is provided with closing seat that can be descending, closes seat by closing seat shear pin
It is fixed in the cavity of interior pass borehole jack upper inner, closing on the outside of seat to be provided with can be such that interior pass borehole jack is closed with its descending inner card cage
Close the passage for being provided with seat and putting into the ball that builds the pressure；Inner groove upper inner, which is provided with, internally closes the spacing limited block of the descending progress of borehole jack,
At least provided with the blind hole of a circumferential vertical shape on interior pass borehole jack, blind hole is interior to be provided with bearing pin, and interior pass borehole jack top is set
There is a borehole jack groove above blind via bottom, corresponded in insertion tube inside middle portion and wild card is provided with borehole jack groove location
Groove, the limited block that outer end is located in exterior bayonet slot is installed in borehole jack groove；Interior pass borehole jack lower inside is provided with borehole jack land, interior pass
It is provided with the outside of borehole jack and internally closes the descending positioner positioned of borehole jack；Upper land bottom circumferentially has at least one
Circumferentially there is the lower circulation port of at least one inside and outside insertion at the upper circulation port of outer insertion, insertion tube middle part, closes borehole jack inside
Bottom is provided with least one circumferential borehole jack circulation port, and borehole jack circulation port is corresponding with lower circulation hole site, insertion tube
Bottom is installed with blind guide shoe.
A kind of 2. tieback insertion cementing assembly according to claim 1, it is characterised in that：Positioner includes positioning spiral shell
Nail and lock ring, close be provided with screw locating slot on the outside of the middle part of borehole jack inside, outside is installed with least one in the middle part of insertion tube
The individual positioning screw being uniformly distributed along the circumference, the inner of positioning screw are located in screw locating slot, the interior pass below lower circulation port
Borehole jack lower outside is provided with set annular groove, and lock ring is provided with set annular groove, and insertion tube lower inside is provided with the cylinder below set annular groove
Annular groove.
A kind of 3. tieback insertion cementing assembly according to claim 1 or 2, it is characterised in that：Sealing device is rectangle
Sealing ring, lower annular groove is provided with the outer wall of insertion tube, is located in the upper outside of lower annular groove above lower circulation port and is provided with first
Outer land, at least one rectangular seal being vertically arranged is provided with the first outer land, is located in the lower end outside of lower annular groove
The second outer land is provided with below lower circulation port, at least one rectangular seal being vertically arranged is provided with the second outer land.
A kind of 4. tieback insertion cementing assembly according to claim 1 or 2, it is characterised in that：Corresponding switch sleeve shear pin
At least one O-ring seal is installed between upper circulation port between the cementing device of position and switch hole overcoat, corresponds to and follows
At least one O-ring seal, corresponding inner card cage top are installed between the cementing device and switch hole overcoat of annular distance lower position
At least one O-ring seal is installed, between corresponding exterior bayonet slot and screw locating slot between the closing seat of position and interior pass borehole jack
At least one O-ring seal, corresponding screw locating slot and borehole jack circulation port are installed between the interior pass borehole jack and insertion tube of position
Between position interior pass borehole jack and insertion tube between at least one O-ring seal is installed, it is corresponding lower between circulation port and lock ring
At least one O-ring seal is installed between the interior pass borehole jack and insertion tube of position.
A kind of 5. tieback insertion cementing assembly according to claim 3, it is characterised in that：Corresponding switch sleeve shear pin with it is upper
At least one O-ring seal is installed, circulation port in correspondence between circulation port between the cementing device of position and switch hole overcoat
At least one O-ring seal, corresponding inner card cage top position are installed between the cementing device and switch hole overcoat of lower position
Closing seat and interior pass borehole jack between at least one O-ring seal is installed, position between corresponding exterior bayonet slot and screw locating slot
Interior pass borehole jack and insertion tube between at least one O-ring seal is installed, between corresponding screw locating slot and borehole jack circulation port
At least one O-ring seal, corresponding lower position between circulation port and lock ring are installed between the interior pass borehole jack and insertion tube of position
Interior pass borehole jack and insertion tube between at least one O-ring seal is installed.
A kind of 6. tieback insertion cementing assembly according to claim 1 or 2 or 5, it is characterised in that：The upper end of insertion tube
It is threadably secured and is installed together with the lower end of annular groove.
A kind of 7. tieback insertion cementing assembly according to claim 3, it is characterised in that：The upper end of insertion tube and annular groove
Lower end be threadably secured and be installed together.
A kind of 8. tieback insertion cementing assembly according to claim 4, it is characterised in that：The upper end of insertion tube and annular groove
Lower end be threadably secured and be installed together.
A kind of 9. tieback insertion cementing assembly according to claim 1 or 2 or 5 or 7 or 8, it is characterised in that：Insertion tube
Lower end is threadably secured with blind guide shoe and is installed together.
A kind of 10. tieback insertion cementing assembly according to claim 6, it is characterised in that：Draw with blind insertion tube lower end
Footwear, which are threadably secured, to be installed together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720893251.6U CN207177816U (en) | 2017-07-21 | 2017-07-21 | Tieback inserts cementing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720893251.6U CN207177816U (en) | 2017-07-21 | 2017-07-21 | Tieback inserts cementing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207177816U true CN207177816U (en) | 2018-04-03 |
Family
ID=61736333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720893251.6U Withdrawn - After Issue CN207177816U (en) | 2017-07-21 | 2017-07-21 | Tieback inserts cementing assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207177816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227943A (en) * | 2017-07-21 | 2017-10-03 | 中国石油集团西部钻探工程有限公司 | Tieback inserts cementing assembly |
-
2017
- 2017-07-21 CN CN201720893251.6U patent/CN207177816U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227943A (en) * | 2017-07-21 | 2017-10-03 | 中国石油集团西部钻探工程有限公司 | Tieback inserts cementing assembly |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180403 Effective date of abandoning: 20230728 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180403 Effective date of abandoning: 20230728 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |