CN203822225U - Expansion pipe casing repairing tool - Google Patents
Expansion pipe casing repairing tool Download PDFInfo
- Publication number
- CN203822225U CN203822225U CN201420239450.1U CN201420239450U CN203822225U CN 203822225 U CN203822225 U CN 203822225U CN 201420239450 U CN201420239450 U CN 201420239450U CN 203822225 U CN203822225 U CN 203822225U
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- CN
- China
- Prior art keywords
- expansion
- seal
- expansion tube
- head
- joint ring
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an expansion pipe casing repairing tool used for oil field casing-damaged well repairing operation. The tool comprises an expansion pipe, the two ends of the expansion pipe expand to form an upper expansion cavity and a lower expansion cavity, the lower end of the expansion pipe is connected with a guide head and is sealed, an expansion head is arranged in the lower expansion cavity of the part, located above the guide head, of the expansion pipe, the expansion head and the lower expansion cavity are sealed through a sealing piece, the upper end of the expansion head is connected with a pull rod, seal is formed between the expansion head and the pull rod, a seal ring is arranged on the periphery of the pull rod in a sleeved mode and located in the upper expansion cavity of the expansion pipe, the space between an inner hole of the seal ring and the pull rod is sealed through a sealing piece, the space between the seal ring and the upper expansion cavity is sealed through a sealing piece, threads are arranged at the position, above the seal ring, of the periphery of the pull rod, a limiting ring is installed on the upper portion of the seal ring through the threads and enables the seal ring to be fixed into the upper expansion cavity, and the space between the expansion pipe, the pull rod, the expansion head and the seal ring is sealed through a sealing piece to form a seal cavity together. Due to the fact that the mode of the low-pressure pressurized seal cavity is adopted, the expansion pipe casing repairing tool can greatly improve the force by which the expansion head expands the expansion pipe.
Description
Technical field
The utility model relates to the workover tool using in oil field development, is that expansion tube is repaiied cover instrument specifically, for to occurring that the oil-water well of casing damage carries out repair.
Background technology
The oil well in oil field or well are through long-term production, because corrosion there will be cased perforated; Sometimes because of reasons such as the variation of underground pit shaft ambient stress, cave-ins, there will be the problems such as casing collapse, fracture.In order to repair down-hole casing, occurred that a kind of expansion tube repaiies cover technology.This technology is the sleeve pipe of minor diameter to be delivered to cover by pit shaft damage position, then makes it be fixed on cover damage place, down-hole the casing expandable of minor diameter, reaches the object of repairing damaged sleeve pipe.If the applying date is on October 13rd, 2006, application number is the Chinese patent that 200610016410.0 denominations of invention are " expansion pipe combined well repairing device ", disclosed is exactly such fix tool, this device has a swollen head in the lower end of expansion tube, by hydraulic coupling, promote swollen expansion expansion tube, the breakage that is fixed on sleeve pipe after expansion tube is inflated reaches the object of repairing casing.Swollen head is to promote by the hydraulic coupling below it expansion tube that expands, it is except overcoming the needed power of expansion expansion tube, also to overcome swollen head top hydraulic coupling, because the needed power of expansion expansion tube is very large, promote swollen needed below hydraulic coupling just very high, sometimes because ground goes out the problems such as ability of equipment, may not provide the needed below of swollen head work, down-hole hydraulic coupling.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides expansion tube to repair cover instrument, and compared with prior art, below swollen head, under the constant condition of hydraulic coupling, this instrument can significantly improve the power of swollen expansion expansion tube.
The technical solution of the utility model is: expansion tube is repaiied cover instrument, comprise expansion tube, expansion tube two ends are expanded and are formed upper expansion chamber and lower expansion chamber, expansion tube lower end is connected with guide head and seals, in the lower expansion chamber of expansion tube more than guide head, swollen head is set, between swollen head and lower expansion chamber, by seal, seal, between swollen upper end cylinder lever connecting rod and the two, form sealing, seal ring set is in pull bar periphery and be positioned at the upper expansion chamber of expansion tube, between joint ring endoporus and pull bar, by seal, seal, between joint ring and upper expansion chamber, by seal, seal, joint ring is above arranges screw thread in pull bar periphery, spacing ring is arranged on joint ring above and joint ring is fixed in upper expansion chamber by screw thread, expansion tube, pull bar, between swollen head and joint ring, by seal, seal the common annular seal space that forms.
Compared with prior art, the beneficial effects of the utility model are, structurally it has adopted the mode of setting up a low pressure gas means of press seals chamber above swollen head to reduce the upward pressure of swollen, thereby reached under the constant condition of below swollen head hydraulic coupling, improved the object of the power of swollen expansion expansion tube.Meanwhile, joint ring has also played centralizing function to pull bar, and, seal ring seal the annular seal space of swollen head top, avoided down-hole foreign matter to enter and disturbed the situation of swollen head work, thereby avoided expansion force to increase or swollen head is met the risk of card.
Accompanying drawing explanation
Fig. 1 is that expansion tube is repaiied cover tool construction figure.
The specific embodiment
Expansion tube is repaiied cover tool construction and is seen Fig. 1, expansion tube is repaiied cover instrument and is comprised expansion tube 6, expansion tube 6 two ends are expanded and are formed upper expansion chamber and lower expansion chamber, expansion tube 6 lower ends are connected and seal with guide head 12, in the lower expansion chamber of more than 12 expansion tube 6 of guide head, arrange swollen 9, between the lower expansion chamber of swollen 9 and expansion tube 6, by seal 10, seal, between swollen 9 upper end cylinder lever connecting rod 1 and the two, form sealing, joint ring 3 is enclosed within pull bar 1 periphery and is positioned at the upper expansion chamber of expansion tube 6, between joint ring 3 endoporus and pull bar, by seal 5, seal, between joint ring 3 and the upper expansion chamber of expansion tube 6, by seal 4, seal, joint ring more than 3 arranges screw thread in pull bar 1 periphery, spacing ring 2 is arranged on joint ring by screw thread and more than 3 also joint ring 3 is fixed in upper expansion chamber, expansion tube 6, pull bar 1, between swollen 9 and joint ring 3, by seal, seal the common annular seal space 7 that forms.
Expansion tube 6 lower ends can be connected by screw thread with guide head 12, and establish seal 11 and seal, and certainly, also can adopt the mode of welding to connect between the two.
Swollen 9 upper ends are connected by oil pipe thread with pull bar 1, and this connection has sealing effectiveness.Certainly, also can adopt other connected mode, as use a unsealed combination seal part sealing of being threaded, or and adopt the gas thread of other thread seal.
In order to improve sealing effectiveness, seal 10 and seal 4 can adopt the mode of combination sealing, as adopted multiple tracks " V " type rubber seal interval to install the structure of polytetrafluoroethylene (PTFE) circle additional.
It is not damaged in order to guarantee swollen head seal 5 in up process,, the periphery of the pull bar 1 between swollen 9 and joint ring 4 is smooth surface, usually, this surperficial roughness design is less than 1.6 μ m.
This instrument completes after assembling on ground, has just sealed atmospheric air in annular seal space 7, can certainly replace with other gas, or makes it produce negative pressure.
In order to improve the sealing effectiveness between expansion tube 6 and oil well sleeve pipe, expansion tube 6 peripheries are provided with multiple tracks soft metal seal 8, and the material of described soft metal seal 8 is red copper, aluminium, aluminium alloys etc.In order to protect soft metal seal 8, expansion tube 6 external diameters at upper expansion chamber and lower expansion chamber place are greater than the external diameter of the outer set soft metal seal 8 of expansion tube 6.
When casing damaged well workover treatment, expansion tube is repaiied to cover instrument and with oil pipe or drilling rod, be sent to precalculated position, down-hole, on ground, beat hydraulic pressure, hydraulic coupling passes to by oil pipe or drilling rod swollen 9 belows that expansion tube is repaiied cover instrument, this hydraulic coupling is made as P1, air pressure in annular seal space 7 is made as P2, and the oil jacket annular space hydrostatic pressure that expansion tube is repaiied the cover instrument degree of depth of living in is made as P3, the axial thrust load of swollen 9 expansion expansion tubes=(P1-P2) * swollen stressed pressure reduction area.In expansion expansion tube process swollen 9 and pull bar 1 up, by compression, pressure P 2 constantly raises the air in annular seal space 7, when P3 > P2, joint ring 3 can remain in expansion chamber, and when P2 >=P3, it is up with pull bar 1 that joint ring 3 can leave expansion chamber.By above-mentioned force analysis, can find out, under P3 > P2 state, being 200610016410.0 denominations of invention with application number compares for the instrument described in the Chinese patent of " expansion pipe combined well repairing device ", just can realize expansion tube workover treatment to swollen 9 one less hydraulic coupling P1.
Simultaneously, 3 pairs of pull bars 1 of joint ring have also played centralizing function, make swollen 9 placed in the middle and expansion force is more even in up process, and, joint ring 3 has sealed the annular seal space 7 of swollen 9 tops, avoided down-hole foreign matter to enter annular seal space 7 and disturbed swollen 9 situation of working, thereby having avoided the risk that expansion force increases or swollen is met card.
Claims (7)
1. expansion tube is repaiied cover instrument, comprise expansion tube, expansion tube two ends are expanded and are formed upper expansion chamber and lower expansion chamber, expansion tube lower end is connected with guide head and seals, in the lower expansion chamber of expansion tube more than guide head, swollen head is set, between swollen head and lower expansion chamber, by seal, seal, between swollen upper end cylinder lever connecting rod and the two, form sealing, it is characterized in that, seal ring set is in pull bar periphery and be positioned at the upper expansion chamber of expansion tube, between joint ring endoporus and pull bar, by seal, seal, between joint ring and upper expansion chamber, by seal, seal, joint ring is above arranges screw thread in pull bar periphery, spacing ring is arranged on joint ring above and joint ring is fixed in upper expansion chamber by screw thread, expansion tube, pull bar, between swollen head and joint ring, by seal, seal the common annular seal space that forms.
2. expansion tube according to claim 1 is repaiied cover instrument, it is characterized in that, on ground, complete after assembling, and in described annular seal space, be atmospheric air.
3. expansion tube according to claim 1 is repaiied cover instrument, it is characterized in that, the periphery of the pull bar between swollen head and joint ring is smooth surface.
4. expansion tube according to claim 1 is repaiied cover instrument, it is characterized in that, the connection between pull bar and swollen head is oil pipe thread.
5. expansion tube according to claim 1 is repaiied cover instrument, it is characterized in that, expansion tube periphery is provided with multiple tracks soft metal seal.
6. expansion tube according to claim 5 is repaiied cover instrument, it is characterized in that, the material of described soft metal seal is red copper.
7. expansion tube according to claim 1 is repaiied cover instrument, it is characterized in that, the expansion tube external diameter at upper expansion chamber and lower expansion chamber place is greater than the external diameter of the outer set soft metal seal of expansion tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239450.1U CN203822225U (en) | 2014-05-12 | 2014-05-12 | Expansion pipe casing repairing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239450.1U CN203822225U (en) | 2014-05-12 | 2014-05-12 | Expansion pipe casing repairing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203822225U true CN203822225U (en) | 2014-09-10 |
Family
ID=51477738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420239450.1U Withdrawn - After Issue CN203822225U (en) | 2014-05-12 | 2014-05-12 | Expansion pipe casing repairing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203822225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967438A (en) * | 2014-05-12 | 2014-08-06 | 中国石油化工股份有限公司 | Tool for repairing sleeve with expansion pipe |
-
2014
- 2014-05-12 CN CN201420239450.1U patent/CN203822225U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967438A (en) * | 2014-05-12 | 2014-08-06 | 中国石油化工股份有限公司 | Tool for repairing sleeve with expansion pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140910 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |