CN210714497U - Double-layer combined sleeve - Google Patents
Double-layer combined sleeve Download PDFInfo
- Publication number
- CN210714497U CN210714497U CN201921131922.0U CN201921131922U CN210714497U CN 210714497 U CN210714497 U CN 210714497U CN 201921131922 U CN201921131922 U CN 201921131922U CN 210714497 U CN210714497 U CN 210714497U
- Authority
- CN
- China
- Prior art keywords
- casing
- coupling joint
- thread coupling
- double
- external thread
- 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.)
- Active
Links
- 230000008878 coupling Effects 0.000 claims abstract description 62
- 238000010168 coupling process Methods 0.000 claims abstract description 62
- 238000005859 coupling reaction Methods 0.000 claims abstract description 62
- 239000002131 composite material Substances 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 5
- 239000004568 cement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008855 peristalsis Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Images
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The utility model discloses a double-layer combined sleeve structure, which comprises an internal thread coupling joint, an external thread coupling joint, an outer sleeve and an inner sleeve; two ends of the outer casing pipe are respectively in threaded connection with the internal thread coupling joint and the external thread coupling joint, so that the sealing performance and the connection performance of the casing pipe are realized, one end of the inner casing pipe is connected with the internal thread coupling joint in a threaded connection mode, and the other end of the inner casing pipe is inserted into an inner hole clamping groove of the external thread coupling joint; the utility model can effectively solve the problems of processing and assembling of the double-layer combined casing, so that the double-layer combined casing has stable and reliable structure, and the plastic deformation resistance of the inner-layer casing is effectively improved, thereby improving the external extrusion strength of the whole double-layer combined casing, and being particularly suitable for shale gas horizontal section oil layer casings which need multiple fracturing operations; in the service process, the drilling fluid enters the annular space to balance the pressure difference between the inner wall and the outer wall of the outer casing pipe, and the extrusion resistance of the outer casing pipe is effectively improved.
Description
Technical Field
The utility model belongs to the technical field of the structure and the assembly of the used sleeve pipe of oil, gas field exploration and development, concretely relates to double-deck combination sleeve pipe.
Background
With the deepening of the production and development of various oil fields at home and abroad, most oil fields have different degrees of casing damage, and great influence is caused on the production and development of petroleum. The double-layer combined casing pipe is an important means for the early protection of the casing pipe, most of the double-layer combined casing pipes adopt a method of cement injection between an inner casing pipe and an outer casing pipe, so that the extrusion strength of the casing pipe can be improved, but in an area with large stratum peristalsis, the extrusion force of the stratum is directly transmitted to the inner casing pipe through an outer casing pipe and a cement ring, the damage is caused to the inner casing pipe, the oil extraction engineering cannot be carried out, and the construction is complex and is not easy to operate. Meanwhile, the prior documents and patents and the like do not have a specific assembling method of the double-layer combined sleeve.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a double-deck combination sleeve pipe, its connection structure can realize accomplishing the assembly in the mill, the well team job site only need with internal thread coupling joint with external thread coupling joint high speed connect can, guaranteed safe efficient lower casing operation process, simultaneously, anti crowded intensity is high, the inlayer sleeve pipe is not fragile.
In order to achieve the purpose, the technical scheme adopted by the utility model is that the double-layer combined casing comprises an internal thread coupling joint, an external thread coupling joint outer casing and an inner casing, wherein one end of the external thread coupling joint connecting casing is provided with an inner hole clamping groove for connecting the inner casing, and two ends of the outer casing are respectively connected with the internal thread coupling joint and the external thread coupling joint; the first end of the inner-layer sleeve is provided with an inner-layer sleeve external thread, the inner-layer sleeve is in threaded connection with the internal thread coupling joint through the inner-layer sleeve external thread, the wall of the second end of the inner-layer sleeve is flat, and the second end of the inner-layer sleeve is inserted into an inner hole clamping groove of the external thread coupling joint.
Outer sheathed tube both ends all set up outer sleeve pipe external screw thread, and interior thread coupling connects and the outer threaded coupling connects all to be provided with and is used for connecting outer sheathed tube internal thread, and outer sleeve pipe both ends connect and connect threaded connection with interior thread coupling and outer threaded coupling respectively.
The length of the outer sleeve is less than the length of the inner sleeve.
An annular space is arranged between the outer casing and the inner casing.
The end face of the inner-layer sleeve connected with the external thread coupling joint and the end face of the inner hole clamping groove are provided with gaps.
The annular space is communicated with the inner side of the inner sleeve.
Compared with the prior art, the utility model discloses following beneficial effect has at least: the outer casing pipe is connected with the internal thread coupling joint and the external thread coupling joint through threads, so that the connection strength and the sealing performance of the double-layer casing pipe are effectively guaranteed; the double-deck sheathed tube structural integrity has effectively been guaranteed to inlayer sleeve pipe one end and interior thread coupling joint threaded connection, during the other end inserts the hole draw-in groove that the external thread coupling connects, because the terminal surface that inlayer bushing connection external thread coupling connects is equipped with the clearance with the terminal surface of hole draw-in groove, and the in-service in-process, drilling fluid gets into the annular space clearance, and the pressure differential of outer sleeve pipe inside and outside wall is balanced, effectively improves outer sheathed tube anti crowded intensity outward.
In addition, the assembly of the single double-layer sleeve is carried out in a production factory, the assembly precision and the quality reliability are ensured, the double-layer combined sleeve of the utility model also has the advantages and the characteristics of simple, convenient and reliable assembly method and high production efficiency; during field operation, the internal thread coupling joint and the external thread coupling joint are tightly connected through threads, the mode of the internal thread coupling joint and the external thread coupling joint is the same as that of conventional casing running, and safe, efficient and timely casing running operation is guaranteed.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal thread collar joint structure of the present invention;
FIG. 3 is a schematic view of the external thread coupling joint structure of the present invention;
FIG. 4 is a schematic view of the outer casing structure of the present invention;
fig. 5 is a schematic view of the inner casing structure of the present invention.
1-female thread collar joint, 2-male thread collar joint, 3-outer casing, 4-inner casing, 11-joint connection female thread, 12-inner casing connection thread, 13-outer casing connection thread, 21-joint male thread, 22-male collar joint female thread, 23-female hole clamping groove, 41-inner casing male thread, 31-outer casing male thread;
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a double-layer combined casing comprises an internal thread coupling joint 1, an external thread coupling joint 2, an outer casing 3 and an inner casing 4, wherein one end of the external thread coupling joint 2, which is connected with the casing, is provided with an inner hole clamping groove 23 for connecting the inner casing, and two ends of the outer casing 3 are respectively connected with the internal thread coupling joint 1 and the external thread coupling joint 2; the first end of the inner casing 4 is provided with inner casing external threads 41, the inner casing 4 is in threaded connection with the internal thread coupling joint 1 through the inner casing external threads 41, the wall of the second end of the inner casing 4 is flat, and the second end of the inner casing 4 is inserted into the inner hole clamping groove 23 of the external thread coupling joint 2; outer sleeve pipe 3's both ends all set up outer sleeve pipe external screw thread 31, and interior thread coupling connects 1 and outer thread coupling connects 2 and all is provided with the internal thread that is used for connecting outer sleeve pipe 3, and outer sleeve pipe 3 both ends connect 1 and outer thread coupling and connect 2 threaded connection with interior thread coupling respectively.
As shown in fig. 2, one end of the inside collar joint 1 is provided with a joint connection inside thread 11, one end of the inside collar joint 1 connection sleeve is processed with an inner layer sleeve connection thread 12 and an outer layer sleeve connection thread 13 of different intermediate diameters, and the inner layer sleeve connection thread 12 and the outer layer sleeve connection thread 13 are stepped threads.
As shown in fig. 3, one end of the outside collar nipple 2 is provided with a nipple male thread 21, the nipple male thread 21 is used for connecting the inside collar nipple 1, and one end of the connection sleeve is provided with an outside collar nipple female thread 22 and a bore neck 23 for connecting the inner casing 4.
As shown in fig. 4, the outer layer casing outer threads 31 are provided at both ends of the outer layer casing 3;
as shown in fig. 5, the first end of the inner casing 4 is provided with an inner casing external thread 41, and the second end is flat on both the inner and outer walls.
In the structure shown in fig. 1, an annular space exists between the inner casing 4 and the outer casing 3, and the value of the annular space is 3-10 mm; the outer casing 3 is 100 and 150mm shorter than the inner casing 4.
The method for assembling the single double-layer combined sleeve comprises the following steps:
the first end of the inner casing 4 is connected with the internal thread coupling joint 1;
one end of the outer casing 3 is connected with the internal thread coupling joint 1;
the other end of the outer casing 3 is connected with the external thread coupling joint 2, and the second end of the inner casing 4 is inserted into an inner hole clamping groove 23 of the external thread coupling joint 2;
the double-layer combined casing string is assembled in such a way that the joint connection internal thread 11 of the internal thread coupling joint 1 is connected with the joint external thread 21 of the external thread coupling joint 2.
An annular gap is arranged between the assembled inner casing 4 and the assembled outer casing 3, and the annular gap is communicated with the inner wall annulus of the inner casing 4.
The double-layer combined sleeve assembled and formed through the embodiment ensures the assembly precision and quality reliability because the assembly of a single double-layer sleeve is carried out in a production factory. Outer sleeve pipe and interior thread collar connect and the outer thread collar connects all through threaded connection, have effectively guaranteed double-deck sheathed tube joint strength and sealing performance. The first end of inlayer sleeve pipe 4 and interior thread collar joint 1 threaded connection, the second end of inlayer sleeve pipe 4 inserts in the hole draw-in groove 23 of external thread collar joint 2, has effectively guaranteed double-deck sheathed tube structural integrity. During field operation, the internal thread coupling joint 1 and the external thread coupling joint 2 are tightly connected through threads, the mode of the casing running is the same as that of the conventional casing running, and safe, efficient and timely casing running operation is guaranteed. Meanwhile, as the gap is formed between the end face of the inner casing 4 connected with the external thread coupling joint 2 and the end face of the inner hole clamping groove 23, the drilling fluid enters the annular gap in the service process, the pressure difference between the inner wall and the outer wall of the outer casing 3 is balanced, and the external extrusion resistance of the outer casing is effectively improved. Furthermore, the utility model discloses a double-deck combination sleeve pipe still has that assembly method is simple, convenient, reliable, advantage and characteristics that production efficiency is high.
Claims (6)
1. A double-layer combined casing is characterized by comprising an internal thread coupling joint (1), an external thread coupling joint (2), an outer casing (3) and an inner casing (4), wherein an inner hole clamping groove (23) for connecting the inner casing is formed in one end, connected with the casing, of the external thread coupling joint (2), and two ends of the outer casing (3) are respectively connected with the internal thread coupling joint (1) and the external thread coupling joint (2); the first end of inlayer sleeve pipe (4) sets up inlayer sleeve pipe external screw thread (41), and inlayer sleeve pipe (4) are connected with interior thread coupling joint (1) threaded connection through inlayer sleeve pipe external screw thread (41), and the pipe wall is leveled to inlayer sleeve pipe (4) second end, and inlayer sleeve pipe (4) second end inserts hole draw-in groove (23) that the external thread coupling connects (2).
2. The double-layer combined casing according to claim 1, wherein the outer casing external threads (31) are arranged at both ends of the outer casing (3), the internal thread coupling joint (1) and the external thread coupling joint (2) are provided with internal threads for connecting the outer casing (3), and both ends of the outer casing (3) are respectively in threaded connection with the internal thread coupling joint (1) and the external thread coupling joint (2).
3. The double-layer composite bushing according to claim 1, wherein the length of the outer bushing (3) is smaller than the length of the inner bushing (4).
4. The double-layer composite bushing according to claim 1, wherein an annular space is provided between the outer bushing (3) and the inner bushing (4).
5. The double-layer combined casing pipe according to claim 4, wherein the end face of the inner-layer casing pipe (4) connected with the external thread coupling joint (2) and the end face of the inner hole clamping groove (23) are provided with gaps.
6. The double-layer composite sleeve according to claim 4, characterized in that the annular gap communicates with the inside of the inner sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921131922.0U CN210714497U (en) | 2019-07-18 | 2019-07-18 | Double-layer combined sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921131922.0U CN210714497U (en) | 2019-07-18 | 2019-07-18 | Double-layer combined sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210714497U true CN210714497U (en) | 2020-06-09 |
Family
ID=70933147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921131922.0U Active CN210714497U (en) | 2019-07-18 | 2019-07-18 | Double-layer combined sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210714497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388183A (en) * | 2019-07-18 | 2019-10-29 | 中国石油天然气集团有限公司 | A double-layer combined casing and its assembly method |
| CN112161142A (en) * | 2020-10-31 | 2021-01-01 | 杨新超 | Pipeline water injection valve and seabed conveying pipeline using same |
-
2019
- 2019-07-18 CN CN201921131922.0U patent/CN210714497U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388183A (en) * | 2019-07-18 | 2019-10-29 | 中国石油天然气集团有限公司 | A double-layer combined casing and its assembly method |
| CN110388183B (en) * | 2019-07-18 | 2024-12-27 | 中国石油天然气集团有限公司 | Double-layer combined casing and assembly method thereof |
| CN112161142A (en) * | 2020-10-31 | 2021-01-01 | 杨新超 | Pipeline water injection valve and seabed conveying pipeline using same |
| CN112161142B (en) * | 2020-10-31 | 2022-04-05 | 山东中力高压阀门股份有限公司 | Pipeline water injection valve and seabed conveying pipeline using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210714497U (en) | Double-layer combined sleeve | |
| CN202689965U (en) | Air-tight seal oil pipe threaded joint applied to high-temperature and high-pressure gas well | |
| CN102900377A (en) | Threaded connection type all-aluminum alloy drill stem | |
| CN102678065A (en) | High-airtightness special buttress thread pipe joint | |
| CN210714498U (en) | Double-layer combined sleeve with circumferential weld | |
| CN203531775U (en) | Straight-thread connector with three torque shoulders | |
| CN202673178U (en) | High-sealing buttress threaded conduit connecting joint | |
| CN202165026U (en) | Sealing structure for underground tool pipe joint | |
| CN110374520B (en) | Double-layer combined sleeve with girth weld and assembly method thereof | |
| CN221053636U (en) | High anti-torque sealing joint for petroleum casing pipe | |
| CN110439477B (en) | Double-layer combined sleeve with mismatched strength | |
| CN203403832U (en) | Air-tight seal screwed joint | |
| CN202689964U (en) | Casing thread connecting structure for heat production well | |
| CN110388183B (en) | Double-layer combined casing and assembly method thereof | |
| CN110439478B (en) | Double-layer combined sleeve structure with inner-layer sleeve in threaded connection and assembling method thereof | |
| CN212508136U (en) | Double-wall drill rod | |
| CN201943592U (en) | Novel external thickening oil pipe and sleeve | |
| CN204040938U (en) | A kind of Oil/gas Well thimble assembly | |
| CN202140031U (en) | An expansion pipe thread connection structure | |
| CN201778666U (en) | A non-coupling oil casing | |
| CN201466660U (en) | Split type cable connection structure for oil gas exploitation intellect drill string adapter | |
| CN201943598U (en) | Split assembled heat-insulating oil tube connecting structure | |
| CN201715131U (en) | Airtight saw-toothed thread connector and casing and coupling utilizing same | |
| CN206625815U (en) | A kind of anti-leak thermal extraction casing head | |
| CN213743282U (en) | Digital non-standard drilling tool connecting joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |