CN204060540U - A kind of double layer oil pipe isolation steering knuckle - Google Patents
A kind of double layer oil pipe isolation steering knuckle Download PDFInfo
- Publication number
- CN204060540U CN204060540U CN201420346895.XU CN201420346895U CN204060540U CN 204060540 U CN204060540 U CN 204060540U CN 201420346895 U CN201420346895 U CN 201420346895U CN 204060540 U CN204060540 U CN 204060540U
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- CN
- China
- Prior art keywords
- double layer
- oil pipe
- layer oil
- outer tube
- steering knuckle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002955 isolation Methods 0.000 title claims abstract description 23
- 125000006850 spacer group Chemical group 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 11
- 239000004576 sand Substances 0.000 abstract description 11
- 238000005406 washing Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 7
- 239000000356 contaminant Substances 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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- Pipeline Systems (AREA)
Abstract
The utility model relates to a kind of double layer oil pipe isolation steering knuckle.The operation of conventional levels well sand-flushing adopts all or part of double layer oil pipe, and the packer be mated, only in the construction coordinating sand washing drill bit bottom, does not possess preventing or reduces the function of formation leakage, reduce the operating efficiency of sand cleaning fluid.A kind of double layer oil pipe isolation steering knuckle, comprise coaxially sheathed outer tube and interior pipe, double layer oil pipe annular space is formed between outer tube and interior pipe, double layer oil pipe annular space comprises the blind end being communicated with end and being formed by horn-like joint, its large end and the tube wall end of outer tube be airtight to be connected and its end is mutually concordant with outer tube end, and small end is connected with interior pipe is airtight; The outer tube of double layer oil pipe isolation steering knuckle is arranged with the self-styled gum cover be close to its outer wall, and the two ends of self-styled gum cover are provided with spacer ring, and the spacer ring sidepiece near blind end is provided with stop collar.The utility model can hydraulic slip at the bottom of control well, reduces formation contaminant and also improves liquid utilization ratio.
Description
Technical field
the utility model relates to a kind of sand washing machine double layer oil pipe joint, especially a kind of double layer oil pipe isolation steering knuckle.
Background technology
When conventional application double layer oil pipe or concentric oil tubes carry out horizontal well sand washing clean-out service, the all or part of double layer oil pipe of general employing or concentric oil tubes carry out operation, the packer be mated, only in the construction coordinating sand washing drill bit bottom, does not possess preventing or reduces the function of formation leakage.In this kind of construction, because the perforated interval of horizontal well has rice up to a hundred even to go up more than km, its each perforated interval all participates in the liquid-circulating of sand washing operation, and therefore the wastage on stratum is very considerable.The leakage of sand washing liquid, not only directly reduces the operating efficiency of sand cleaning fluid, and more formation causes various pollution, and the oil productive capacity on stratum is reduced, and more difficult recovery.
Summary of the invention
The purpose of this utility model be to provide one can double layer oil pipe with the use of, reach hydraulic slip at the bottom of control well, reduce formation contaminant and improve liquid utilization ratio double layer oil pipe isolation steering knuckle.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of double layer oil pipe isolation steering knuckle, comprise coaxially sheathed outer tube and interior pipe, outer tube two ends are respectively by screwed connection tubing coupling, double layer oil pipe annular space is formed between outer tube and interior pipe, described double layer oil pipe annular space comprises the blind end being communicated with end and being formed by horn-like joint, described horn-like joint is cavity body, comprise large end and small end, its large end and the tube wall end of outer tube be airtight to be connected and its end is mutually concordant with outer tube end, and small end is connected with interior pipe is airtight; The outer tube of double layer oil pipe isolation steering knuckle is arranged with the self-styled gum cover be close to its outer wall, the two ends of self-styled gum cover are provided with spacer ring, spacer ring sidepiece near blind end is provided with stop collar, described stop collar is provided with flow channels, the outer tube wall below stop collar is provided with the through hole corresponding with flow channels.
The inwall of described stop collar is provided with groove.
Compared with prior art, the utility model has following beneficial effect: the utility model on double layer oil pipe with self-styled gum cover, connection and the fluid course that can not only complete double layer oil pipe and plain tubing are changed, under the mating reaction of upper and lower two joints and double layer oil pipe, can make in oil jacket annular space, to form specific non-current insulating space.After shaft bottom perforated interval enters this non-current insulating space, the liquid-circulating system had can be isolated, thus stop the formation leakage of this perforated interval, reduce formation contaminant, and make the utilization ratio of work on hand circulating fluid keep not falling.In the operations such as horizontal well sand washing, in the length-adjustable situation of double layer oil pipe, segregate perforated interval is more, then its lost circulation prevention function is more obvious, and efficiency and the utilization rate of working cycles liquid are higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is using state reference diagram of the present utility model;
Fig. 3 is spacing nested structure schematic diagram.
Wherein: 1. outer tube; 2. pipe in; 3. horn-like joint; 4. self-styled gum cover; 5. spacer ring; 6. stop collar; 7. flow channels; 8. through hole; 9. groove; 10. double layer oil pipe annular space; 11. tubing couplings; 12. double layer oil pipe pipe strings; Double layer oil pipe isolation steering knuckle on 13.; 14. times double layer oil pipe isolation steering knuckles.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is described in detail.
See Fig. 1, a kind of double layer oil pipe isolation steering knuckle, comprise coaxially sheathed outer tube 1 and interior pipe 2, double layer oil pipe annular space 10 is formed between outer tube 1 and interior pipe 2, double layer oil pipe annular space 10 is comprised the blind end that formed by horn-like joint 3 and is communicated with end, horn-like joint 3 is cavity bodys, and its large end and the tube wall end of outer tube 1 be airtight to be connected and its end is mutually concordant with outer tube 1 end, and small end is connected with interior pipe 2 is airtight; Outer tube 1 is arranged with the self-styled gum cover 4 be close to its outer wall, the two ends of self-styled gum cover 4 are provided with spacer ring 5, spacer ring 5 sidepiece near blind end is provided with stop collar 6, stop collar 6 is provided with flow channels 7, stop collar 6 is provided with groove 9 and the through hole 8 corresponding with flow channels 7 on outer tube 1 tube wall of below.
Groove 9 on stop collar 6, because the internal diameter of stop collar differs less with ridden oil-pipe external wall external diameter, the through hole on both is if there is the situation of mutual dislocation, extreme influence is circulated, for this reason, process groove in the inner side of stop collar, be equivalent to the wall thickness of stop collar to decrease a part.
See Fig. 2, in use, adopt two double layer oil pipe isolation steering knuckles, namely double layer oil pipe isolation steering knuckle 13 is gone up and lower double layer oil pipe isolation steering knuckle about 14 matches use, and its middle connected double-layer oil pipe pipe string 12, the length of double layer oil pipe pipe string 12 is more than or equal to perforation length at the bottom of Horizontal Well.
In such cases, its operating principle is: in the oil jacket annular space of well head, inject working cycles liquid, when liquid flows to the self-styled gum cover at upper double layer oil pipe isolation steering knuckle 13 place, run into the stop of self-styled gum cover 4, liquid can enter into the flow channels 7 of the stop collar of double layer oil pipe isolation steering knuckle 13, and flow in double layer oil pipe annular space 10 from the through hole 8 outer tube 1 tube wall corresponding with it, when hydraulic fluid continues to go downwards to lower double layer oil pipe isolation steering knuckle 14 place, flow out from the flow channels 7 on outer tube 1 tube wall and stop collar 6 flow channels 7 corresponding with it, and under the self-styled gum cover 4 that lower double layer oil pipe is isolated on steering knuckle 14 acts on, continue descending along oil jacket annular space, thus coordinate the instrument of bottom to carry out operation.Under the self-styled gum cover 4 and double layer oil pipe string acting in conjunction therebetween of upper and lower two double layer oil pipes isolation steering knuckle, oil jacket annular space in tubing string between two double layer oil pipe isolation steering knuckles has been isolated hydraulic fluid circulating system by shutoff, and be everyly isolated out normal circulation system by the horizontal well perforation Duan Junhui that this interval is included in, thus reach the object reducing and prevent perforated interval formation leakage.
For the formation leakage amount caused when fundamentally reducing horizontal well sand washing operation, reduce formation contaminant and sand cleaning fluid is provided carry efficiency, and reduce the usage quantity of double layer oil pipe or concentric oil tubes.Double layer oil pipe of the present utility model is adopted to isolate steering knuckle, just can realize the airtight isolation of wherein one section of oil jacket annular space, if this airtight distance piece long enough, then can isolate enough perforated intervals, segregate perforated interval is made not participate in the work of the circulating system, thus fundamentally can reduce formation leakage, reach the object of lost circulation prevention.
Claims (2)
1. a double layer oil pipe isolation steering knuckle, it is characterized in that: comprise coaxially sheathed outer tube (1) and interior pipe (2), outer tube (1) two ends are respectively by screwed connection tubing coupling (11), double layer oil pipe annular space (10) is formed between outer tube (1) and interior pipe (2), described double layer oil pipe annular space (10) comprises the blind end being communicated with end and being formed by horn-like joint (3), described horn-like joint (3) is cavity body, comprise large end and small end, its large end and the tube wall end of outer tube be airtight to be connected and its end is mutually concordant with outer tube (1) end, small end is connected with interior pipe (2) is airtight, the outer wall of outer tube (1) is arranged with the self-styled gum cover (4) be close to it, the two ends of self-styled gum cover (4) are provided with spacer ring (5), spacer ring (5) sidepiece near blind end is provided with stop collar (6), described stop collar (6) is provided with flow channels (7), the outer tube wall of stop collar (6) below is provided with the through hole (8) corresponding with flow channels (7).
2. a kind of double layer oil pipe isolation steering knuckle according to claim 1, is characterized in that: the inwall of described stop collar (6) is provided with groove (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420346895.XU CN204060540U (en) | 2014-06-27 | 2014-06-27 | A kind of double layer oil pipe isolation steering knuckle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420346895.XU CN204060540U (en) | 2014-06-27 | 2014-06-27 | A kind of double layer oil pipe isolation steering knuckle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204060540U true CN204060540U (en) | 2014-12-31 |
Family
ID=52202079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420346895.XU Expired - Lifetime CN204060540U (en) | 2014-06-27 | 2014-06-27 | A kind of double layer oil pipe isolation steering knuckle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204060540U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700766A (en) * | 2019-11-21 | 2020-01-17 | 西南石油大学 | Same-diameter double-layer continuous oil pipe connecting device |
-
2014
- 2014-06-27 CN CN201420346895.XU patent/CN204060540U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700766A (en) * | 2019-11-21 | 2020-01-17 | 西南石油大学 | Same-diameter double-layer continuous oil pipe connecting device |
| CN110700766B (en) * | 2019-11-21 | 2024-05-24 | 西南石油大学 | Same-diameter double-layer continuous oil pipe connecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |