CN85204194U - Hydrolic thermal sealing device - Google Patents
Hydrolic thermal sealing device Download PDFInfo
- Publication number
- CN85204194U CN85204194U CN 85204194 CN85204194U CN85204194U CN 85204194 U CN85204194 U CN 85204194U CN 85204194 CN85204194 CN 85204194 CN 85204194 U CN85204194 U CN 85204194U CN 85204194 U CN85204194 U CN 85204194U
- Authority
- CN
- China
- Prior art keywords
- packer
- sealing device
- fluid cylinder
- outside seal
- pipe
- 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.)
- Ceased
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Abstract
The utility model discloses an underground mining sealing device used for exploiting thick oil by injecting high-temperature steam into oil layers. The underground mining sealing device adopts a base sealing and lifting unsealing form, and is suitable to deep wells and inclined wells. Compared with mechanical packers, the utility model has the advantages of reliable operation, wide application, etc. The underground mining sealing device can ensure seal under the condition of 200 at, pressure difference and 400 DEG C temperature. The utility model can complete the construction steps of base sealing, steam injecting unsealing, etc., by the pipe column at one time.
Description
The present invention relates to a kind of down-hole sealing device that comes heavy crude producing to oil reservoir injection high-temperature steam.
At present, the heating power packer that heavy oil wells adopted is rotation adding pressure type packer, when this packer is transferred to the precalculated position of oil well by oil pipe, to rotate whole oil well pipe earlier, make the packer of tubing string bottom rely on its inner guiding device guiding, and then apply certain axial load for the oil well pipe post.Oil well pipe is passed to packer with this load, the rubber sealing element on the compression packer and packer is sealed in well.But the problem that this activities exists is, because oil pipe is subjected to axial compressive load in the limited oil well of sectional dimension, makes oil pipe produce helical buckling.Only depend on this limited oil well pipe axial load, be difficult to make packer set tight; Especially deep-well and inclined shaft because the borehole wall produces the component effect to oil pipe (generation helical buckling), make the load that is applied to oil well pipe can not pass to packer fully, thereby influence the sealing performance of packer.In addition, need adopt high strength tubing during this packer set, the seat envelope finished before steam injection, also will change into insulated tubing and could annotate vapour production, had so just strengthened labour intensity, had improved operating cost.
The present invention does not see that through looking into the world patent document 1963～in July, 1985 it has report.
The objective of the invention is to provide a kind of waterpower formula heating power packer, it can guarantee to inject the down-hole sealing of high-temperature steam oil well, and only need rise, oil well pipe (being steam injection string) can be finished seat envelope from packer next time, the production of annotating vapour and oil well separates to seal up until at last and put forward the packer activities.
The present invention is achieved in that
When one, seat seals:
1, packer is gone into the well, and the lower contact of packer (22) connects 30 to 50 meters tail pipe, and tail pipe is partly with devices such as screen casing and plug.
2, go into the well top connection (1) and the insulated tubing of packer directly connects, and packer and a whole set of steam injection string are in the lump in the lower going-into-well.
3, under the packer behind the precalculated position, thermal production well mouth is installed, connect pressure guiding pipeline.
4, after well head and pressure guiding pipeline install, begin to suppress, make packer set from oil pipe.
5, the 100at that boosts earlier, voltage stabilizing 5～10 minutes boosts to 150～180at again, stablizes after 15 minutes pressure is reduced to zero, boosts to 240at again, destroys pressure-bearing ball seat (20), at this moment packer the seat envelope finish.
6, the seat envelope of packer is to promote one-level fluid cylinder (8) and secondary fluid cylinder (9) and piston (10) respectively by hydraulic pressure, and the firsts and seconds fluid cylinder acts on the outside seal may (7) simultaneously, makes its pressurized and moulding again; Piston (10) promotes upper cone and releases slips, and slips just is stuck on the casing wall firmly, thus the whole packer of grappling.
7, after packer set is finished, just can steam injection pipeline be installed at well head.
Waterpower formula heating power packer is honored as a queen through seat and just can be utilized former seat tube sealing post to annotate vapour, and at this moment, the main outer seal of steam injection pressure (7) bears.Outside seal may be with the repressed moulding of nickel wire net can be used for protect that outside seal may is unlikely to be damaged in the process of going into the well; outside seal may adopts and is subjected to transfer moulding method simultaneously; can make this device under the situation of steam injecting temperature 370 degree, can bear 200 atmospheric pressure; and still can keep better seal; thereby adaptation is about the pressure reduction 200at on the outside seal may (7); be up to 370 ℃ requirement with vapor (steam) temperature, so this packer service behaviour is reliable.In addition, this packer has also been avoided the restriction of rotation adding pressure type packer to seat envelope load, thus this packer deep-well and inclined shaft all normally seat seal.
The deblocking program of this packer:
When the needs deblocking packer, only need to carry steam injection string, packer gets final product deblocking.
It is at first to pull down thermal production well mouth in proper order, upper lifting pipe post then, when on when putting forward load and surpassing the steam injection string gross weight, the deblocking shear pin (3) on the packer is cut off, pipe (4) and connected body (18) together rose in top connection (1) was related.At this moment, in the groove of lock dog (17) setback connected body (18), lower contact (22) and lower center tube (15) are broken away from, lower cone (16) is left behind by tail pipe weight, and the conical surface of lower cone (16) breaks away from slips, makes packer be in the deblocking state.Carry steam injection string in the continuation, safety screw (2) just moves the weight of packer and tail pipe to top connection (1), carries in the continuation along with tubing string, and packer will be regained slips (14), and proposes together outside the well in company with steam injection string, and the packer deblocking finishes.
The present invention has following advantage:
1, packer of the present invention is the seat envelope form of waterpower compression owing to what take, so it can be used in the middle-deep well.
2, the inside and outside sealing of packer employing of the present invention all is the combined high-temperature potted component, can bear the pressure reduction of 200at, and anti-400 ℃ of high temperature.
3, packer of the present invention not only is applicable to steamed well, also can be used for the construction of conventional well or inclined shaft simultaneously.
4, packer of the present invention, is annotated vapour, is driven a well and recover the oil and steps such as last deblocking only need once rise, steam injection string down its envelope, therefore can improve operating speed greatly, simplifies operation procedure.
Concrete structure of the present invention is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the sectional drawing of the waterpower formula heating power packer of proposition according to the present invention.
Below in conjunction with Fig. 1, describe the concrete structure and the working condition of packer of the present invention in detail.
After the top connection of this packer (1) and interior pipe (4) and connected body (18) connect successively by screw thread, the inside of upper center tube that the spiral marking connection of packing into gets up (5) and lower center tube (15) is fixed into one to interior pipe and upper center tube with safety screw (2) and deblocking shear pin (3).Protrusion-dispelling part (6), outside seal may (7), one-level fluid cylinder (8) and secondary fluid cylinder (9) are housed respectively in the outside of upper center tube (5), piston (10), retaining snap (11) and locking slide block (12) are housed in the cavity of secondary fluid cylinder (9), retaining snap (11) and locking slide block (12) make piston (10) can only folk prescription to mobile.Lower center tube (15) outside is equipped with upper cone (13), lower cone (16) and lower contact (22) successively, three slips of packing (14) between upper cone (13) and the lower cone (16).Lock dog (17) and sliding screw (19) are fixing with lower center tube (15) by thread connection lower cone (16), lower contact (22) together.It is spacing by the release shear pin (21) that is screwed in lower center tube (15) end being contained in the inner pressure-bearing ball seat (20) of connected body (18).
After the packer that is associated in the insulated tubing bottom arrives the desired depth of oil well down, begin power fluid to be injected oil well with high-pressure pump, the pressure guide hole (in figure do not draw) of power fluid on upper center tube acts on one respectively, on secondary fluid cylinder and the piston, the firsts and seconds fluid cylinder pushes outside seal may simultaneously under hydraulic action, make the moulding again of its pressurized, this moment, the packer outside seal may can be sealed on oil pipe and the sleeve pipe annular space, piston then promotes upper cone and bores out slips simultaneously, impel slips to be stuck on the casing wall firmly, thus fixing whole packer and down-hole string.
The deblocking of packer can be taked to carry the mode deblocking, but also dextrorotation oil well pipe, the lower cone of packer is rotated, and it is unsettled that packer is in, and is convenient to deblocking, though a kind of deblocking mode operation in back is little convenient, and is still fully desirable as a kind of auxiliary deblocking mode.
Claims (3)
1, a kind ofly inject high temperature and high pressure steam to oil reservoir to come the down-hole sealing device of heavy crude producing be by (1) top connection, (2) safety screw, (3) deblocking shear pin, (4) pipe in, (5) upper center tube, (7) outside seal may, (11) retaining snap, (12) locking slide block, (13) upper cone, (14) slips, (15) lower center tube, (16) lower cone, (17) lock dog, (18) connected body, (19) sliding screw, (20) pressure-bearing ball seat, (21) discharge shear pin, (22) lower splice component is formed.
It is characterized in that:
One-level fluid cylinder (8), secondary fluid cylinder (9) are housed in the A outside seal may (7).
B is equipped with a piston (10) in the secondary fluid cylinder.
2, a kind of according to the said down-hole of claim 1 sealing device, it is characterized in that: the outside seal may two ends are surrounded by the protrusion-dispelling part (6) with nickel wire compression moulding.
3, a kind of according to the said device of claim 1, it is characterized in that lock dog (17) is a hexahedron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204194 CN85204194U (en) | 1985-09-20 | 1985-09-20 | Hydrolic thermal sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204194 CN85204194U (en) | 1985-09-20 | 1985-09-20 | Hydrolic thermal sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204194U true CN85204194U (en) | 1986-10-08 |
Family
ID=4799562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204194 Ceased CN85204194U (en) | 1985-09-20 | 1985-09-20 | Hydrolic thermal sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204194U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131800A (en) * | 2014-07-18 | 2014-11-05 | 中国海洋石油总公司 | Thermal production well annulus safety control tool |
-
1985
- 1985-09-20 CN CN 85204194 patent/CN85204194U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131800A (en) * | 2014-07-18 | 2014-11-05 | 中国海洋石油总公司 | Thermal production well annulus safety control tool |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |