CN205025449U - Annotate vapour technology tubular column - Google Patents
Annotate vapour technology tubular column Download PDFInfo
- Publication number
- CN205025449U CN205025449U CN201520602056.4U CN201520602056U CN205025449U CN 205025449 U CN205025449 U CN 205025449U CN 201520602056 U CN201520602056 U CN 201520602056U CN 205025449 U CN205025449 U CN 205025449U
- Authority
- CN
- China
- Prior art keywords
- tubing string
- steam injection
- tubular column
- packer
- sleeve pipe
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- 238000005516 engineering process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 44
- 239000007788 liquid Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000010734 process oil Substances 0.000 abstract 1
- 210000003128 Head Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 210000003284 Horns Anatomy 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
The utility model relates to an annotate vapour technology tubular column, tubular column in stretching into oil gas well casing, the tubular column has and is stretching into in the time of in the sleeve pipe the tubular column with can form the annular space between the sleeve pipe, the tubular column has and is close to the first end of oil gas well well head and keeping away from the second end of oil gas well well head, the tubular column is inside follows first end extremely the second end is formed with fluid passage, the setting is in the tubular column is close to the sealing element of second end, sealing element with the tubular column cooperatees, sealing element can the tubular column is gone into down in -process in the sleeve pipe is sealed the annular space. The utility model discloses string structure is simple, does not increase operation procedure and expense, and under the prerequisite that does not improve the operating cost, can guarantee does not have liquid with notes vapour in -process oil jacket annular space before annotating vapour, reduced thermal production well annular space heat loss, improves and annotates vapour efficiency.
Description
Technical field
The utility model belongs to heavy crude petroleum thermal recovery steam injection field, particularly a kind of steam injection technology tubing string.
Background technology
Usually, under viscous crude refers to formation condition, viscosity is greater than 50 millis handkerchief second (mPa.s), or degassed crude viscosity is the high viscosity heavy crude of 1000 ~ 10000 milli handkerchief seconds under reservoir temperature.Viscous crude is except viscosity is higher, and density is also higher, and the viscosity of viscous crude varies with temperature more remarkable.
In the recovery process of heavy crude reservoir, because Viscosity of Heavy Crude Oil is higher, density is comparatively large, and oil reservoir filtrational resistance is large, makes crude oil more difficult from the pit shaft of stratum inflow Oil/gas Well.Even if crude oil can flow to the wellbore bottom of Oil/gas Well, in the process flowed from wellbore bottom to pit shaft mouth, because step-down is degassed and radiating and cooling, Crude viscosity increases further, and viscous crude mobility is deteriorated, and exploitation difficulty strengthens.In the recovery process of heavy crude reservoir, extensively adopt the method injecting vapours in heavy crude reservoir, the saturated moist steam by a certain amount of HTHP injects oil reservoir, to reduce Viscosity of Heavy Crude Oil, improves its mobility.
At present, during heavy crude heat extraction, normally under enter completion tubular column after, then by steam injection oil reservoir.And when running string, in the annular space formed between tubing string and sleeve pipe, usually can retain liquid, injection liquid when this partially liq source may be drilling well, also may be underground water.Under normal circumstances, the thermal conductivity of liquid is higher than the thermal conductivity of air, therefore the heat energy of steam is passed to the liquid in oil jacket annular space more easily by tubing string, sleeve pipe and overlying rock is passed to again through annulus fluid, thus cause the steam thermal energy being actually used in heating Heavy Oil Reservoir to incur loss, cause the huge waste injecting steam thermal energy.
Utility model content
The purpose of this utility model is a kind of exploitation being applicable to the not high heavy crude reservoir of underground water hydraulic pressure of design, before steam injection and in steam injection process tubing string oil jacket annular space in the steam injection technology tubing string of no liquid.
For achieving the above object, of the present utility modelly following technical proposal is adopted.
The utility model provides a kind of steam injection technology tubing string, comprising:
Can stretch into the tubing string in Oil/gas Well sleeve pipe, described tubing string has when stretching in described sleeve pipe, can form annular space between described tubing string and described sleeve pipe; Described tubing string has the first end near described Oil/gas Well well head, and away from the second end of described Oil/gas Well well head; Described tubing string inside is formed with fluid passage from described first end to described second end; Be arranged on the potted component of described tubing string near described second end, described potted component matches with described tubing string, in the process that described potted component is entered in described sleeve pipe under described tubing string, seals described annular space.
As a preferred embodiment, between described first end and described potted component, be provided with packer.Model for packer does not do requirement, as long as can meet the packer setting requirement, preferred packer is thermal packer.
As a preferred embodiment, described potted component comprises hollow tube and seal.Described seal is arranged on described hollow tube in socket mode, during described seal matches with affiliated sleeve pipe and can make to enter under described tubing string in described sleeve pipe process, seal described annular space, thus entering in the process in described sleeve pipe under described tubing string, the liquid in described annular space is extruded and returns out from the fluid passage of described tubing string.Described hollow tube can be dry pipe or steel pipe.Be provided with packer between described first end and described potted component, described hollow tube and described packer can be one-body molded, and namely described potted component and packer are designed to integration tool; Or described potted component is an independent downhole tool, and namely described hollow tube two ends are connected on described tubing string.Preferably, described seal and packer are all arranged on more than oil reservoir, can make to have better steam injection passage during steam injection, ensure steam injection efficiency.
As a preferred embodiment, described seal only need ensure described packer complete set before do not lose efficacy, described sealing member material can be rubber, is provided with packer between described first end and described potted component, and the heat resisting temperature of seal sets temperature higher than described packer; Seal quantity can be one or more.
As a preferred embodiment, described tubing string can be oil pipe or insulated tubing, is preferably insulated tubing, can reduce the thermal losses of injecting steam better.Described insulated tubing comprises the first insulated tubing and the second insulated tubing, is provided with telescoping tube between described first insulated tubing and described second insulated tubing.Telescoping tube two ends are threaded connection joint, then are connected with insulated tubing.Telescoping tube can be out of shape in the longitudinal extension of auto-compensation oil pipe, reduces risk, improves success rate.
The utility model compared with prior art tool has the following advantages:
1, tubular column structure is simple, does not increase operation procedure and expense;
2, oil jacket annular space no liquid before steam injection and in steam injection process, annular space heat waste is low, and steam injection efficiency is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described.
Fig. 1 is the structural representation of an embodiment of the present utility model;
Fig. 2 is the structural representation of an embodiment of the present utility model.
Reference numeral in accompanying drawing: 1, sleeve pipe; 2, tubing string; 3, opening; 4, potted component; 5, packer; 6, oil jacket annular space; 201, the first insulated tubing; 202, the second insulated tubing; 203, telescoping tube; 401, hollow tube; 402, seal.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Accompanying drawings 1, a kind of steam injection technology tubing string that present embodiment provides, comprise the tubing string 2 that can stretch in Oil/gas Well sleeve pipe 1, tubing string 2 has when stretching in sleeve pipe 1, can form oil jacket annular space 6 between tubing string 2 and sleeve pipe 1; Tubing string 2 has the first end of close Oil/gas Well well head, and away from the second end of Oil/gas Well well head; Tubing string 2 inside is formed with fluid passage from first end to the second end; Be arranged on the potted component 4 of tubing string 2 near the second end, potted component 4 matches with tubing string 2, and potted component 4 can be entered for 2 times in the process in sleeve pipe 1 at tubing string, Seal Oil cover annular space 6.
Concrete, tubing string 2 can be oil pipe or insulated tubing, is preferably insulated tubing, can reduce the thermal losses of injecting steam better.Tubing string 2 comprises the first insulated tubing 201, second insulated tubing 202 and the inside of telescoping tube 203, first insulated tubing 201 that is arranged between the first insulated tubing 201 and the second insulated tubing 202 and the second insulated tubing 202 is formed with fluid passage; Tubing string 2 forms opening 3 away from the fluid passage place at one end place of Oil/gas Well well head, and opening 3 can be horn mouth; Tubing string 2 is provided with potted component 4 near opening 3 place, and potted component 4 matches with tubing string 2, potted component 4 can be entered for 2 times in the process of sleeve pipe 1, the oil jacket annular space 6 formed between Sealed casing pipe 1 and tubing string 2 at tubing string.
Tubing string 2 is provided with packer 5 near between one end of Oil/gas Well well head and potted component 4, and packer 5 is close to potted component 4 side.Potted component 4 comprises hollow tube 401 and seal 402, and seal 402 is set on hollow tube 401, and seal 402 matches with sleeve pipe 1 and makes potted component 4 Seal Oil can overlap annular space 6.Seal 402 can be interference fit or other modes matched with the fit system of sleeve pipe 1, and the external diameter of interference fit and seal 402 is greater than the internal diameter of sleeve pipe 1, makes potted component 4 can realize sealing with sleeve pipe 1.Hollow tube 401 two ends are connected on tubing string 2 with helicitic texture.
Seal 402 need ensure packer 5 complete set before do not lose efficacy.Preferably, seal 402 is made up of rubber, and the heat resisting temperature of seal 402 sets temperature higher than packer 5.Seal 402 can realize the sealing state of oil jacket annular space 6 between sleeve pipe 1 and tubing string 2 when not reaching its heat resisting temperature.The quantity of seal 402 can be one or more, according to the quantity of practical effect determination seal 402.
In one preferred embodiment, telescoping tube 203 two ends are threaded connection joint, then are connected with the first insulated tubing 201 and the second insulated tubing 202.Telescoping tube 203 can auto-compensation oil pipe dilatation vertically, reduces risk, improves success rate.
In one preferred embodiment, packer 5 is thermal packer.In the utility model, requirement is not done for the model of packer 5, as long as the packer setting requirement can be met.
In one preferred embodiment, for making to have better steam injection passage during steam injection, ensure steam injection efficiency, reach the effect better reducing steam injection heat waste, the position of potted component 4 is selected more than oil reservoir.As long as the heat resistance of potted component 4 ensures that seal 402 did not lose efficacy before packer 5 sets.For ensureing sealing effectiveness, the seal that can suitably select heat resistance better, such as, under steam injecting temperature, seal did not lose efficacy.
During real work, tubing string enters for 2 times in the process of sleeve pipe 1, potted component 4 coordinates due to its seal 402 and sleeve pipe 1, potted component 4 can oil jacket annular space 6 between Sealed casing pipe 1 and tubing string 2, the oil jacket annular space 6 between sleeve pipe 1 and tubing string 2 is made to be in sealing state, play the effect of piston, liquid in extruding oil jacket annular space 6 enters after the fluid passage of tubing string 2 inside from opening 3 in tubing string 2, returns that (oily liquid in pipe also can be extracted out with other equipment such as flushing pumps, retain in oil pipe when having a small amount of liquid to extract out and also do not affect steam injection efficiency), to ensure that before steam injection no liquid in oil jacket annular space 6.
During steam injection, vapours enters oil reservoir from opening 3 downwards along the fluid passage of tubing string 2 inside, and the heat of steam passes to oil reservoir, at the steam injection process initial stage, still be in sealing state between potted component 4 and sleeve pipe 1, ensure that in steam injection process no liquid in oil jacket annular space 6.Along with injecting increasing of vapours amount, the heat of steam is delivered to potted component 4 and packer 5, and the temperature of potted component 4 and packer 5 raises gradually.Because the heat resisting temperature of potted component 4 sets temperature higher than packer 5, therefore along with temperature raises, packer 5 first completes and sets, and makes the oil jacket annular space 6 between packer 5 and sleeve pipe 1 realize sealing.Enter under tubing string and terminate to steam injection, oil jacket annular space 6 is in sealing state all the time, ensure that no liquid in oil jacket annular space 6.
Steam injection technology tubing string in the utility model, tubular column structure is simple, does not increase operation procedure and expense, under the prerequisite not improving operating cost, can to ensure before steam injection and no liquid in oil jacket annular space in steam injection process, reduce thermal production well annular space heat waste, improve steam injection efficiency.
Accompanying drawings 2, the structure of the steam injection technology tubing string of another present embodiment of the application is substantially identical with aforementioned, and can have and the substantially identical technique effect in last embodiment.In the following description, be only described from aforementioned different structure member and effect thereof, for identical structure member, then the description thereof will be omitted.
As shown in Figure 2, in the present embodiment, hollow tube 401 and the packer 5 of potted component 4 can be formed in one and make, and make potted component 4 and packer 5 can form an integrated downhole tool, can ensure equally before steam injection with oil jacket annular space 6 no liquid in steam injection process.Its advantage to reduce by a downhole tool, and tubular column structure is simple, and only needing to change seal 402 during damage can reuse.
By reference to the accompanying drawings the utility model is elaborated above, but the utility model is not limited to above-mentioned embodiment.Of the present utility model focusing on thisly can ensure annular space no liquid; reduce the tubular column structure of thermal loss; as long as other instruments can meet tubing string requirement; even if make various change to the utility model; as long as its thinking meets innovation of the present utility model, then still fall within protection domain of the present utility model.
Claims (10)
1. a steam injection technology tubing string, is characterized in that, comprising:
Can stretch into the tubing string in Oil/gas Well sleeve pipe, described tubing string has when stretching in described sleeve pipe, can form annular space between described tubing string and described sleeve pipe; Described tubing string has the first end near described Oil/gas Well well head, and away from the second end of described Oil/gas Well well head; Described tubing string inside is formed with fluid passage from described first end to described second end;
Be arranged on the potted component of described tubing string near described second end, described potted component matches with described tubing string, in the process that described potted component is entered in described sleeve pipe under described tubing string, seals described annular space.
2. steam injection technology tubing string according to claim 1, is characterized in that, is provided with packer between described first end and described potted component.
3. steam injection technology tubing string according to claim 2, is characterized in that, described packer is thermal packer.
4. steam injection technology tubing string according to claim 1, is characterized in that, described potted component comprises hollow tube and seal, and described seal is arranged on described hollow tube in socket mode.
5. steam injection technology tubing string according to claim 4, is characterized in that, described hollow tube two ends are connected on described tubing string.
6. steam injection technology tubing string according to claim 4, is characterized in that, is provided with packer between described first end and described potted component, and described hollow tube and described packer are formed in one.
7. steam injection technology tubing string according to claim 4, is characterized in that, described sealing member material is rubber.
8. steam injection technology tubing string according to claim 7, it is characterized in that, be provided with packer between described first end and described potted component, the heat resisting temperature of described seal sets temperature higher than described packer, can lose sealing after described seal reaches its heat resisting temperature.
9. steam injection technology tubing string according to claim 4, is characterized in that, described seal quantity is one or more.
10. steam injection technology tubing string according to claim 1, it is characterized in that, described tubing string is insulated tubing, and described insulated tubing comprises the first insulated tubing and the second insulated tubing, is provided with telescoping tube between described first insulated tubing and described second insulated tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520602056.4U CN205025449U (en) | 2015-08-11 | 2015-08-11 | Annotate vapour technology tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520602056.4U CN205025449U (en) | 2015-08-11 | 2015-08-11 | Annotate vapour technology tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205025449U true CN205025449U (en) | 2016-02-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520602056.4U Active CN205025449U (en) | 2015-08-11 | 2015-08-11 | Annotate vapour technology tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205025449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156062A (en) * | 2015-07-21 | 2015-12-16 | 胡显三 | Sealing barrel |
-
2015
- 2015-08-11 CN CN201520602056.4U patent/CN205025449U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156062A (en) * | 2015-07-21 | 2015-12-16 | 胡显三 | Sealing barrel |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |