CN2753875Y - Thermo-expansion type packer - Google Patents
Thermo-expansion type packer Download PDFInfo
- Publication number
- CN2753875Y CN2753875Y CN 200420036569 CN200420036569U CN2753875Y CN 2753875 Y CN2753875 Y CN 2753875Y CN 200420036569 CN200420036569 CN 200420036569 CN 200420036569 U CN200420036569 U CN 200420036569U CN 2753875 Y CN2753875 Y CN 2753875Y
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- type packer
- expansion type
- heat expansion
- expansion
- oil
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Abstract
The utility model relates to a thermo-expansion type packer which adjusts the steam injection layer position of an oil reservoir in the process of the thermal power exploitation of high-congeal thick oil, which comprises a central pipe 2, an expansion barrel 9, expansion liquor 8, a non-metal sealing sleeve 10, a pressure-releasing rod 11, a pressure-releasing baffle plate 13, etc., wherein the cavity of the expansion barrel 9 is filled with the expansion liquor 8. The expansion liquor 8 expands after the action of the heat energy generated when an oil well is injected with steam so that the diameters of the expansion barrel 9 and the non-metal sealing sleeve 10 are enlarged, sealing the annular space of an oil pipe and a sleeve pipe of the oil well and separating the upper part oil layer and the lower part oil layer of the oil well to reach the goals of layer-separating steam injection and layer-separating oil exploitation. The utility model is provided with a pressure-releasing unsealing device which is convenient for the thermo-expansion type packer to unseal. The utility model adopts a separated design, wherein a main body part can be continuously used and an expansion body part can be replaced; both adopt the fixed form of thread connection and can save one third of manufacturing cost. The utility model is suitable for gorging and disgorging the steam-injecting well of the thermal power exploitation of the thick oil.
Description
Technical field
The utility model relates to a kind of oil exploitation downhole tool, specifically is the packer that is used for Seal Oil casing and oil pipe annular space in a kind of heavy oil development process.
Background technology
In the heavy oil development process, the packer that is used for the sealing of oil well casing and oil pipe annular space mainly contains two classes at present, and a class is the heat-resisting packer of hydraulic pressure seat sealed type, and another kind of is the heat expansion type packer.The heat expansion type packer is with its easy construction, and cost is lower etc., and advantage is widely adopted.Its basic principle is: inflation fluid is housed in the packer, under the effect of steam (thickened oil recovery must be injected high steam and is used for reducing thick oil viscosity in oil well), inflation fluid vaporization in the packer, volume increases, produce the outer wall distortion of pressure promotion packer inflation tube, its diameter is increased, reach the purpose of Sealed casing pipe and oil pipe annular space.The shortcoming that the heat expansion type packer in use exists is: packer is designed to integral type, and its expansion cylinder is a metalwork, and at expanded by heating, diameter increases the back and produces permanent deformation, can not reuse, and causes packer integral body to scrap.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of above-mentioned heat expansion type packer, a kind of split type heat expansion type packer is provided, the expander of this packer can be changed, and remaining most of spare and accessory parts can be reused, and reaches the purpose of saving manufacturing cost.
The technical scheme that the utility model technical solution problem is adopted is: normally used overall thermal expanding packer is designed to the split formula, can be designed to main part by reusable accessory, it comprises: box cupling, pressure release baffle plate, central tube, pedestal, connected body, pressure cap, back-up ring.Disposable accessory is an expander, and it comprises: expansion of metal tube, nonmetal sealing shroud, pressure release bar, joint ring, sealing ring.The fixedly employing threaded connection mode of main part and expander is equipped with the heatproof graphite-seal ring between the two, realizes high temperature resistant, high pressure sealing.The fixedly employing welding manner of the main part of the heat expansion type packer of Shi Yonging and expander in the past.
The beneficial effects of the utility model are that still intact spare and accessory parts were reused after the heat expansion type packer was used, and reached to reduce production costs, and increased the purpose of economic benefit.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is overall structure figure of the present utility model.
Fig. 2 is a main part structure chart of the present utility model.
Fig. 3 is an expander structure chart of the present utility model.
Box cupling on 1. oil pipes among the figure, 2. central tube, 3. pressure cap, 4. back-up ring, 5. carbon seal ring, 6. connected body, 7. graphite-seal ring, 8. inflation fluid, 9. expansion cylinder, 10. nonmetal sealing shroud, 11. the pressure release bar, 12. pedestals, 13. pressure release baffle plates, box cupling under 14. oil pipes, 15. plugs.
The specific embodiment
As shown in Figure 3, the expansion cylinder of heat expansion type packer (9) adopts the mild steel welding fabrication.Pressure release bar (11) adopts regular screw threads to connect with expansion cylinder (9), the sealing of the implementation first order, the column cap position, garden of pressure release bar (11) and expansion cylinder (9) adopt the brazing welding, realize second level sealing (first order sealing and second level sealing should be finished before expansion cylinder (9) welding fabrication).
Fill inflation fluid (8) in the cavity of the expansion cylinder of heat expansion type packer (9).
The plug of heat expansion type packer (15) adopts regular screw threads to connect with expansion cylinder (9), carries out first order sealing.The column cap position, garden of plug (15) and expansion cylinder (9) adopt the electric welding welding, realize second level sealing.
The nonmetal sealing shroud (10) of heat expansion type packer adopts matched in clearance directly to assemble with expansion cylinder (9).
As shown in Figure 2, on the oil pipe of heat expansion type packer under box cupling (1) and the oil pipe box cupling (14) have the standard cone gas thread to be used for connecting with oil pipe in the oil well.
Adopt the standard cone gas thread to connect on the central tube of heat expansion type packer (2) and the oil pipe under box cupling (1) and the oil pipe between the box cupling (14).
The pressure cap of heat expansion type packer (3) adopts regular screw threads to connect with connected body (6).
Between back-up ring of heat expansion type packer (4) and connected body (6), the central tube (2) is matched in clearance.
The connected body of heat expansion type packer (6) adopts regular screw threads to connect with pedestal (12).
Between the pedestal of heat expansion type packer (12), pressure cap (3) and the central tube (2) is matched in clearance, and pressure cap (3) compresses back-up ring (4), carbon seal ring (5) is fixing and sealing by screwing.。
Between the pressure release baffle plate (13) of heat expansion type packer and the central tube (2) is matched in clearance, by box cupling (14) location under the oil pipe.
The design of the pedestal of heat expansion type packer (12) lower end has aperture, is used for pressure release bar (11) and passes.
(Fig. 3, Fig. 2 composition diagram 1) as shown in Figure 1,
Directly assemble the regular screw threads fixed expansion tube (9) between pedestal (12) and the connected body (6) between expansion cylinder of heat expansion type packer (9) and the pedestal (12) for matched in clearance.
Seal by graphite-seal ring (7) between pedestal of heat expansion type packer (12) and expansion cylinder (9) and the connected body (6).
The course of work during heat expansion type packer set:
The following box cupling (14) of heat expansion type packer connects 10 to 20 meters tail pipe.
The last box cupling (1) of heat expansion type packer directly connects with oil pipe, and a whole set of steam injection string is in the lump in the lower going-into-well.
According to oil well interval difference, the heat expansion type packer down to behind the precalculated position of (layer steam injection) on the interlayer between the upper and lower oil reservoir or oil reservoir top (heat insulation notes vapour), is installed thermal production well mouth, connect with the ground steam injection pipeline.
In oil well, inject high steam, inflation fluid (8) after the expansion cylinder (9) of heat expansion type packer is heated after about 2 hours in the body begins vaporization, volume increases, produce expansionary force and promote the expansion of expansion cylinder (9) outer wall, its diameter is increased, after increasing simultaneously, the diameter of nonmetal sealing shroud (10) seals up the interior oil pipe of oil well and the annular space of sleeve pipe, the complete seat envelope of heat expansion type packer after about 6 hours.
Course of work during heat expansion type packer deblocking:
Steam injection finishes, after determining the interior no pressure of oil well, unload thermal production well mouth, carry oil pipe directly, the central tube of oil pipe and heat expansion type packer (2) moves upward simultaneously, central tube (2) will drive pressure release baffle plate (13) and move upward, the expansion cylinder (9) and the nonmetal sealing shroud (10) of the heat expansion type packer of seat envelope then do not move upward, when pressure release baffle plate (13) moves up to pressure release bar (11) position, carry oil pipe in the continuation, the pressure release baffle plate (13) of heat expansion type packer is with the screw thread top slide fastener of pressure release bar (11) with expansion cylinder (9), and the weld of brazing is simultaneously backed down, inflation fluid (8) in the expansion cylinder (9) flows out the back pressure release, and the heat expansion type packer is by deblocking.Carry oil pipe in the continuation, a whole set of steam injection string proposes oil well, is lowered to deep well pump and directly pumps.
Last box cupling (1), pressure cap (3), the connected body (6) of the heat expansion type packer of dilatancy are screwed off, change expansion cylinder (9), inflation fluid (8), nonmetal sealing shroud (10), pressure release bar (11), plug (15), carbon seal ring (5), graphite-seal ring and both can reuse after (7).
The heat expansion type packer is applicable to the notes vapour well of handling up of viscous crude heating exploitation.Especially be applied to handle up and annotate the layer steam injection or the operation of heat insulation notes vapour of vapour well.
Claims (9)
1, a kind of heat expansion type packer that is used for heavy crude heat extraction, comprise box cupling on (1) oil pipe, (2) central tube, (3) pressure cap, (4) back-up ring, (5) carbon seal ring, (6) connected body, (7) graphite-seal ring, (8) inflation fluid, (9) expansion cylinder, (10) nonmetal sealing shroud, (11) pressure release bar, (12) pedestal, (13) pressure release baffle plate, box cupling under (14) oil pipe, (15) plug, it is characterized in that: the central tube of heat expansion type packer (2) passes in the middle of pedestal (12), and pressure release baffle plate (13) is arranged at the bottom of heat expansion type packer, and the expansion cylinder of heat expansion type packer (9) has cavity, pressure release bar (11) is arranged at expansion cylinder (9) bottom, and central tube (2) two ends have that box cupling (14) is the standard cone gas thread under box cupling on the oil pipe (1) and the oil pipe.
2, heat expansion type packer according to claim 1, it is characterized in that pressure release bar (11) and expansion cylinder (9) adopt regular screw threads to connect, the brazing welding is adopted in the sealing of the implementation first order, the column cap position, garden of pressure release bar (11) and expansion cylinder (9), realizes second level sealing.
3, heat expansion type packer according to claim 1 is characterized in that the cavity of expansion cylinder (9) is a welding fabrication, fills inflation fluid (8) in the cavity.
4, heat expansion type packer according to claim 1 is characterized in that plug (15) and expansion cylinder (9) adopt regular screw threads to connect, and carries out first order sealing, and the column cap position, garden of plug (15) and expansion cylinder (9) adopt the electric welding welding, realize second level sealing.
5, heat expansion type packer according to claim 1 is characterized in that pressure cap (3) and connected body (6) adopt regular screw threads to connect.
6, heat expansion type packer according to claim 1, the expander that it is characterized in that the heat expansion type packer partly is disposable use, the main part of heat expansion type packer is can be reusable, and pedestal (12) adopts regular screw threads to connect fixed expansion tube (9) with connected body (6).
7, heat expansion type packer according to claim 1 is characterized in that being between pedestal (12), pressure cap (3) and the central tube (2) matched in clearance, and pressure cap (3) compresses back-up ring (4), carbon seal ring (5) is fixing and sealing by screwing.
8, heat expansion type packer according to claim 1 is characterized in that between pedestal (12) and expansion cylinder (9) and the connected body (6) by graphite-seal ring (7) sealing.
9, heat expansion type packer according to claim 1 is characterized in that being between pressure release baffle plate (13) and the central tube (2) matched in clearance, by box cupling (14) location under the oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420036569 CN2753875Y (en) | 2004-03-24 | 2004-03-24 | Thermo-expansion type packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420036569 CN2753875Y (en) | 2004-03-24 | 2004-03-24 | Thermo-expansion type packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753875Y true CN2753875Y (en) | 2006-01-25 |
Family
ID=35925983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420036569 Expired - Fee Related CN2753875Y (en) | 2004-03-24 | 2004-03-24 | Thermo-expansion type packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753875Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715223A (en) * | 2014-12-02 | 2016-06-29 | 马爱民 | High-temperature sealing device |
| CN109882112A (en) * | 2019-03-06 | 2019-06-14 | 王成军 | A kind of expansion self-sealing packer |
| CN113719247A (en) * | 2020-05-25 | 2021-11-30 | 中国石油天然气股份有限公司 | Thermal expansion casing pipe tripping method and device |
-
2004
- 2004-03-24 CN CN 200420036569 patent/CN2753875Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715223A (en) * | 2014-12-02 | 2016-06-29 | 马爱民 | High-temperature sealing device |
| CN109882112A (en) * | 2019-03-06 | 2019-06-14 | 王成军 | A kind of expansion self-sealing packer |
| CN113719247A (en) * | 2020-05-25 | 2021-11-30 | 中国石油天然气股份有限公司 | Thermal expansion casing pipe tripping method and device |
| CN113719247B (en) * | 2020-05-25 | 2023-11-28 | 中国石油天然气股份有限公司 | Method and device for breaking out thermal expansion sleeve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060125 |