CN209603885U - Inner tube is inserted into linking bilayer tubular column structure - Google Patents
Inner tube is inserted into linking bilayer tubular column structure Download PDFInfo
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- CN209603885U CN209603885U CN201822112165.4U CN201822112165U CN209603885U CN 209603885 U CN209603885 U CN 209603885U CN 201822112165 U CN201822112165 U CN 201822112165U CN 209603885 U CN209603885 U CN 209603885U
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- inner tube
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Abstract
The utility model is that a kind of inner tube is inserted into linking bilayer tubular column structure, the inner tube that the outer tube and more piece connected including more piece by pipe fitting is mutually inserted；The utility model inner tube is inserted into linking bilayer tubular column structure, and inner and outer tubes when the double-deck tubing string tripping in can be made to be attached in well head, and then realizes the double-deck tubing string tripping in simultaneously.The utility model divides claw spring formula clamping portion insert structure using circumferential, and in shaft mouth operation, upper section inner tube can be inserted directly into next section inner tube and connect, and operation is simple；Retaining mechanism is constituted using retaining ring body and limit body, it can be ensured that can not exit in the circumferential annular stop chamber for dividing claw spring formula clamping portion to enter limit body, two section inner tubes is made to be connected firmly；Pin feature is fixed using limit body 5, it can be ensured that the position between the double-deck tubing string is correct.
Description
Technical field
The utility model be about in a kind of oil exploitation the double-deck tubular column structure more particularly to a kind of inner tube insertion connection
Formula bilayer tubular column structure.
Background technique
The double-deck string technology all play the role of in sand control, well workover field it is vital, the double-deck tubing string simultaneously tripping in for
Construction success rate is improved, simplification of flowsheet, running string number is reduced, reduces cost all there is practical significance.And in reality
In Oil Field operation, due to cannot achieve the attended operation of the double-deck tubing string at well head, lead to not realize that the double-deck tubing string is same
When tripping in.It is the outer tube used after first lower assembling in the prior art when the double-deck tubing string tripping in, it is then interior after tripping in assembling again
Pipe finally carries out underground docking；Using the existing this double-deck tubing string tripping in mode, there is a problem of that construction is complicated, at high cost, and
There is also certain failure rates for docking.
The present inventor based on years of experience and practice in relevant industries, proposes a kind of inner tube insertion linking as a result,
The double-deck tubular column structure, to overcome the deficiencies of existing technologies.
Utility model content
The purpose of this utility model is to provide a kind of inner tubes to be inserted into linking bilayer tubular column structure, so that under the double-deck tubing string
Fashionable inner and outer tubes are able to carry out connection in well head, and then realize the double-deck tubing string tripping in simultaneously.
The purpose of this utility model is achieved in that a kind of inner tube insertion linking bilayer tubular column structure, including more piece
The inner tube being mutually inserted by the outer tube and more piece of pipe fitting connection；The internal diameter of the outer tube is in up big and down small ladder-like, big
The first support ring of support upwardly is formed between diameter section and path section；Said inner tube top outer wall is equipped with the snap ring of evagination, interior
Tube bottom end pipe wall, which is formed, circumferentially divides claw spring formula clamping portion, which is arranged in the card on lower section another section inner tube top
On ring；One section of downward retaining annular groove is equipped on the outer wall of inner tube below the snap ring, downward retaining annular groove is by multi-turn zigzag
Annular groove close-packed arrays are constituted；A retaining ring body is arranged on the outer wall of inner tube of downward retaining ring trench bottom, in retaining ring body
Wall surface is equipped with the retaining ring tooth with downward retaining annular groove corresponding matching；The external side of retaining ring is coatedly arranged with one first company
Ring is connect, which is equipped with an annular cavity from bottom to top, and the retaining ring body is covered by the annular cavity；
First connection ring outer wall is fixedly connected with a limit body by the first pin, and limit body top upwardly extends, wall in limit sleeve body
Annular stop chamber is formed between outer wall of inner tube；First connection ring bottom end is fixedly connected with the second connection ring, second connection
Ring is fixed on outer wall of inner tube by the second pin；The outer diameter of the snap ring, the first connection ring and the second connection ring is respectively less than outer tube
Path section internal diameter；Limit body outer diameter it is identical as the major diameter section internal diameter of outer tube and limit body bottom be resisted against first
On pushing out ring.
In a better embodiment of the utility model, the outer diameter of pawl spring formula clamping portion and the internal diameter of limit body
It is identical.
In a better embodiment of the utility model, the first connection ring bottom end and the welding of the second connection ring top are solid
It is fixed.
In a better embodiment of the utility model, the shear strength of the first pin is greater than the shear strength of the second pin.
It is equipped in a better embodiment of the utility model, on the outside of outer tube upper and lower end and to be connect with pipe fitting inner wall
External screw thread.
From the above mentioned, the utility model inner tube is inserted into linking bilayer tubular column structure, interior when can make the double-deck tubing string tripping in
Pipe and outer tube are attached in well head, and then realize the double-deck tubing string tripping in simultaneously.The utility model divides claw spring formula using circumferential
Clamping portion insert structure, in shaft mouth operation, upper section inner tube can be inserted directly into next section inner tube and connect, easy to operate easy
Row；Retaining mechanism is constituted using retaining ring body and limit body, it can be ensured that circumferential that claw spring formula clamping portion is divided to enter limit sleeve
It can not be exited in the annular stop chamber of body, two section inner tubes is made to be connected firmly；Pin feature is fixed using limit body 5, it can
Ensure that the position between the double-deck tubing string is correct.
Detailed description of the invention
Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model
It encloses.Wherein:
Fig. 1: the schematic diagram of linking bilayer tubular column structure is inserted into for the utility model inner tube.
Fig. 2: for the structural schematic diagram of the utility model outer tube.
Fig. 3: for the structural schematic diagram of the utility model inner tube.
Fig. 4: for partial enlargement structural representation at I in Fig. 1.
Fig. 5: for the schematic diagram of the section structure at A-A in Fig. 3.
Fig. 6: for the structural schematic diagram that first segment outer tube is arranged by elevator in well head.
Fig. 7: for the structural schematic diagram that first segment inner tube is arranged in first segment outer tube.
Fig. 8: for the structural schematic diagram for connecting the second section outer tube above first segment outer tube.
Fig. 9: for the structural schematic diagram for lifting the second section outer tube with elevator.
Figure 10: the second section inner tube to be arranged in the second section outer tube and the second section inner tube and first segment inner tube are interconnected
Structural schematic diagram.
Drawing reference numeral:
100, inner tube is inserted into linking bilayer tubular column structure；
1, outer tube；
11, the first support ring；
2, inner tube；
21, snap ring；
22, pawl spring formula clamping portion；
23, downward retaining annular groove；
3, retaining ring body；
31, retaining ring tooth；
4, the first connection ring；
41, annular cavity；
5, body is limited；
51, annular stop chamber；
6, the second connection ring；
71, well head；
72, elevator；
81, the first pin；
82, the second pin；
9, pipe fitting.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model proposes a kind of inner tubes to be inserted into linking bilayer tubular column structure 100, packet
Include the outer tube 1 that more piece is connected by pipe fitting 9 and the inner tube 2 that more piece is mutually inserted；The internal diameter of the outer tube 1 is in up big and down small rank
Scalariform forms the first support ring 11 of support upwardly between major diameter section and path section；2 top outer wall of said inner tube is equipped with outer
Convex snap ring 21, as shown in Figure 1, shown in Figure 5,2 bottom end tube wall of inner tube, which is formed, circumferentially divides claw spring formula clamping portion 22, pawl spring formula clamping
Portion 22 is arranged on the snap ring 21 on another 2 top of section inner tube in lower section；One section is equipped on 2 outer wall of inner tube below the snap ring 21
Downward retaining annular groove 23, downward retaining annular groove 23 is made of multi-turn zigzag annular groove close-packed arrays；As shown in Figure 3, Figure 4, it is located at
A retaining ring body 3 is arranged on 2 outer wall of inner tube of downward 23 bottom of retaining annular groove, 3 inner wall of retaining ring body is equipped with and stops downwards
Move back the retaining ring tooth 31 of 23 corresponding matching of annular groove；3 outside of the retaining ring body is coatedly arranged with one first connection ring 4, this
One connection ring, 4 inner wall is equipped with an annular cavity 41 from bottom to top, and the retaining ring body 3 is covered by the annular cavity 41；The
One connection ring, 4 outer wall is fixedly connected with a limit body 5 by the first pin 81, and limit 5 top of body upwardly extends, and limits body 5
Annular stop chamber 51 is formed between 2 outer wall of inner wall and inner tube；First connection ring, 4 bottom end is fixedly connected with the second connection ring 6, described
Second connection ring 6 is fixed on 2 outer wall of inner tube by the second pin 82；The snap ring 21, the first connection ring 4 and the second connection ring 6
Outer diameter be respectively less than the path section internal diameter of outer tube 1；Limit body 5 outer diameter is identical as the major diameter section internal diameter of outer tube 1 and limit sleeve
The bottom of body 5 is resisted against in the first support ring 11；The outer diameter of pawl spring formula clamping portion 22 is identical as the limit internal diameter of body 5；
The shear strength of first pin 81 is greater than the shear strength of the second pin 82.
The utility model inner tube is inserted into linking bilayer tubular column structure, can be realized the tripping in operation simultaneously of the double-deck tubing string.Such as
Shown in Fig. 6, firstly, 1 upper end of first segment outer tube is connected with pipe fitting by the tripping in first segment outer tube 1 in well head 71 of elevator 72
9, elevator 72 is connected on pipe fitting 9；As shown in fig. 7, the tripping in first segment inner tube 2 in first segment outer tube 1, the first segment inner tube
The bottom of fixed limit body 5 is resisted against in the first support ring 11 of first segment outer tube 1 on 2；As shown in figure 8, in first segment
The second section outer tube 1 is connected above outer tube 1, the lower thread of the second section outer tube 1 is connected to the top of above-mentioned pipe fitting, then, then
Upper second pipe fitting 9 is connected on 1 top of the second section outer tube；As shown in figure 9, replacement elevator, is connected to second with elevator 72
On pipe fitting 9, first segment outer tube 1 and first segment inner tube 2 are extended downwardly into well simultaneously as a result,；As shown in Figure 10, in the second section
Second section inner tube 2 is set in outer tube 1, and first segment inner tube 2 is connected to by the pawl spring formula clamping portion 22 of 2 bottom end of the second section inner tube
On the snap ring 21 on top, thus the second section inner tube 2 is connected with each other with first segment inner tube 2.And then connection third section outer tube 1
With third section inner tube 2, and the second section outer tube 1 and the second section inner tube 2 are extended downwardly into well simultaneously；So by 1 He of more piece outer tube
More piece inner tube 2 is alternately while in lower going-into-well.After the double-deck tubing string tripping in finishes, the inner tube tubing string after connection is integrally transferred,
Thus the second pin 82 connected in each inner tube 2 is cut, and makes retaining ring body 3 along the downward retaining ring on inner pipe wall
Slot 23 is climb tooth, while limit body 5 being pushed to move up, and enters the pawl spring formula clamping portion 22 of a section inner tube 2 annular
In limit chamber 51, being fixedly connected for more piece inner tube 2 is completed.
When needing to propose inner tube, inner tube 2 is above proposed from well head, and the first pin 81 connected in each inner tube 2 is cut, by
This can play out together the inner tube being mutually permanently connected.
From the above mentioned, the utility model inner tube is inserted into linking bilayer tubular column structure, interior when can make the double-deck tubing string tripping in
Pipe and outer tube are attached in well head, and then realize the double-deck tubing string tripping in simultaneously.The utility model divides claw spring formula using circumferential
Clamping portion insert structure, in shaft mouth operation, upper section inner tube can be inserted directly into next section inner tube and connect, easy to operate easy
Row；Retaining mechanism is constituted using retaining ring body and limit body, it can be ensured that circumferential that claw spring formula clamping portion is divided to enter limit sleeve
It can not be exited in the annular stop chamber of body, two section inner tubes is made to be connected firmly；Pin feature is fixed using limit body 5, it can
Ensure that the position between the double-deck tubing string is correct.
Further, in the present embodiment, 4 bottom end of the first connection ring and 6 top of the second connection ring are by being welded and fixed
's；The external screw thread connecting with 9 inner wall of pipe fitting is equipped on the outside of 1 upper and lower end of outer tube；Outer tube 1 is 7 inch pipes, inner tube 2 is 5 inch pipes.
The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model
It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model
Change and modify, should belong to the range of the utility model protection.
Claims (5)
1. a kind of inner tube is inserted into linking bilayer tubular column structure, which is characterized in that outer tube connect including more piece by pipe fitting with
The inner tube that more piece is mutually inserted；The internal diameter of the outer tube is formed between major diameter section and path section in up big and down small ladder-like
The first support ring of support upwardly；Said inner tube top outer wall is equipped with the snap ring of evagination, and inner tube bottom end tube wall forms circumferential point
Claw spring formula clamping portion, the pawl spring formula clamping portion are arranged on the snap ring on lower section another section inner tube top；Below the snap ring
Outer wall of inner tube be equipped with one section of downward retaining annular groove, downward retaining annular groove is made of multi-turn zigzag annular groove close-packed arrays；Position
In being arranged with a retaining ring body on the outer wall of inner tube of downward retaining ring trench bottom, wall surface is equipped with and downward retaining ring in retaining ring body
The retaining ring tooth of slot corresponding matching；The external side of retaining ring is coatedly arranged with one first connection ring, in first connection ring
Wall is equipped with an annular cavity from bottom to top, and the retaining ring body is covered by the annular cavity；First connection ring outer wall is by
One pin is fixedly connected with a limit body, and limit body top upwardly extends, formed between wall and outer wall of inner tube in limit sleeve body
Annular stop chamber；First connection ring bottom end is fixedly connected with the second connection ring, and second connection ring is fixed on by the second pin
On outer wall of inner tube；The outer diameter of the snap ring, the first connection ring and the second connection ring is respectively less than the path section internal diameter of outer tube；Limit sleeve
The outer diameter of body it is identical as the major diameter section internal diameter of outer tube and limit body bottom be resisted against in the first support ring.
2. inner tube as described in claim 1 is inserted into linking bilayer tubular column structure, which is characterized in that pawl spring formula clamping portion
Outer diameter with limit the internal diameter of body it is identical.
3. inner tube as described in claim 1 is inserted into linking bilayer tubular column structure, which is characterized in that the first connection ring bottom end with
Second connection ring top is welded and fixed.
4. inner tube as described in claim 1 is inserted into linking bilayer tubular column structure, which is characterized in that the shear strength of the first pin
Greater than the shear strength of the second pin.
5. inner tube as described in claim 1 is inserted into linking bilayer tubular column structure, which is characterized in that on the outside of outer tube upper and lower end
Equipped with the external screw thread being connect with pipe fitting inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822112165.4U CN209603885U (en) | 2018-12-14 | 2018-12-14 | Inner tube is inserted into linking bilayer tubular column structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822112165.4U CN209603885U (en) | 2018-12-14 | 2018-12-14 | Inner tube is inserted into linking bilayer tubular column structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209603885U true CN209603885U (en) | 2019-11-08 |
Family
ID=68396159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822112165.4U Active CN209603885U (en) | 2018-12-14 | 2018-12-14 | Inner tube is inserted into linking bilayer tubular column structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209603885U (en) |
-
2018
- 2018-12-14 CN CN201822112165.4U patent/CN209603885U/en active Active
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