CN204175268U - For reducing the pit shaft of heat waste - Google Patents
For reducing the pit shaft of heat waste Download PDFInfo
- Publication number
- CN204175268U CN204175268U CN201420587100.4U CN201420587100U CN204175268U CN 204175268 U CN204175268 U CN 204175268U CN 201420587100 U CN201420587100 U CN 201420587100U CN 204175268 U CN204175268 U CN 204175268U
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- CN
- China
- Prior art keywords
- pit shaft
- separating opening
- annular space
- separating
- steam
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- 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 - Fee Related
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- 239000002699 waste material Substances 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims description 53
- 235000014171 carbonated beverage Nutrition 0.000 claims description 19
- 238000010793 Steam injection (oil industry) Methods 0.000 abstract description 13
- 239000003921 oil Substances 0.000 description 46
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Degasification And Air Bubble Elimination (AREA)
Abstract
The utility model discloses a kind of pit shaft for reducing heat waste, it comprises sleeve pipe, be located in the oil pipe in sleeve pipe, sleeve pipe and oil pipe stretch in oil reservoir from ground, it is characterized in that: between sleeve pipe and oil pipe, form annular space, pit shaft also comprises the well head part be arranged on above the ground, well head part has the first flow for being connected with oil pipe and the second runner for being connected with annular space, first flow and the second runner isolated, pit shaft also comprises and to be arranged on above oil reservoir and the packer being positioned at annular space and the water separator be arranged on above packer, water separator have for separating of go out saturation water the first separating opening and for separating of the second separating opening going out dry saturated steam, first separating opening is connected with annular space, second separating opening is used for being connected with oil reservoir.The utility model adopts above structure, utilizes saturation water energy offset pit shaft heat-energy losses, thus steam energy in protection pit shaft, improve steam injection quality and shaft bottom steam quality.
Description
Technical field
The utility model belongs to a kind of oil field gas injection technology and oil production technology technology, particularly a kind of pit shaft reducing heat waste.
Background technology
In the process of heating exploitation viscous crude, the problem of ubiquity pit shaft thermal loss, this is because steam injection steam is the wet saturated steam with certain energy, steam injection steam arrives well head steam quality general about 70%, temperature is about 350 DEG C, and formation temperature is generally at about 100 DEG C.High temp objects steam injection steam will inevitably conduct heat to cryogenic object stratum, namely there is loss in the heat of steam injection steam, its result causes the steam quality injecting pit shaft to decline on the one hand, moisture increase in moist steam, cause arriving shaft bottom steam to carry energy and reduce, can not effective displace crude oil, thus reduce the heat utilization efficiency of steam, on the other hand along with steam injection number of times and the increase of time, sleeve pipe is in high-temperature high-pressure state for a long time and is damaged.
According to wellbore heat basic theories, the key reducing wellbore heat loss how to reduce pit shaft overall coefficient of heat transfer, namely increases entire thermal resistance.Due to the particularity of well wellbore structure, make the diabatic process of steam injection well shaft more complicated, cause the factor of wellbore heat loss to be also many-sided.Such as, the material of shaft structure, casing tube, the mode of well cementation and quality, the full state etc. of oil jacket annular space medium.In numerous influence factors, thermally insulating the borehole effect directly affects shaft bottom steam quality, and shaft bottom steam quality is again the key parameter of thermal recovery, and therefore shaft bottom steam quality is the most effective factor in many factors.Therefore the reduction steam injection wellbore heat loss that the effect of heat insulation ability of thermally insulating the borehole system is effective and feasible is only improved.
Utility model content
In order to overcome the above-mentioned defect of prior art, technical problem to be solved in the utility model there is provided a kind of pit shaft reducing heat waste, and it can reduce the heat waste of pit shaft, to improve the production efficiency of pit shaft.
Concrete technical scheme of the present utility model is:
A kind of pit shaft for reducing heat waste, it comprises sleeve pipe, be located in the oil pipe in described sleeve pipe, described sleeve pipe and described oil pipe stretch in oil reservoir from ground, it is characterized in that: between described sleeve pipe and described oil pipe, form annular space, described pit shaft also comprises the well head part be arranged on above the ground, described well head part has the first flow for being connected with described oil pipe and the second runner for being connected with described annular space, described first flow and described second runner isolated, described pit shaft also comprises and to be arranged on above oil reservoir and the packer being positioned at described annular space and the water separator be arranged on above described packer, described water separator have for separating of go out saturation water the first separating opening and for separating of the second separating opening going out dry saturated steam, described first separating opening is connected with described annular space, described second separating opening is used for being connected with oil reservoir.
Preferably, described water separator comprises the rotational flow separation room and dilatation separation chamber that are communicated with from top to bottom, and described rotational flow separation indoor are provided with rotational flow separation sheet to realize the rotational flow separation of carbonated drink; The cross-sectional diameter of described dilatation separation chamber is greater than described rotational flow separation room and is separated with the dilatation realizing carbonated drink; In described dilatation separation chamber, be also provided with a central tube, described central tube has the passage relative with described rotational flow separation room, and the bottom of described dilatation separation chamber is connected with described first separating opening.
Preferably, the passage of described central tube is connected with the second separating opening.
Preferably, the outer wall of described central tube is provided with and is separated with the obstruct realizing carbonated drink along himself radial obstruct separate sheet extended, described first separating opening is positioned at the below of described obstruct separate sheet.
Preferably, be also provided with the collecting chamber be connected with described dilatation separation chamber in the below of described obstruct separate sheet, described first separating opening is opened in the bottom of described collecting chamber.
Preferably, described obstruct separate sheet is outwards downward-sloping gradually by center.
Preferably, described first flow and described second runner parallel.
The utility model adopts above structure, utilizes saturation water energy offset pit shaft heat-energy losses, thus steam energy in protection pit shaft, improve steam injection quality and shaft bottom steam quality.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit the utility model scope of disclosure by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping understanding of the present utility model, are not the shape and the proportional sizes that specifically limit each parts of the utility model.Those skilled in the art, under instruction of the present utility model, can select various possible shape and proportional sizes to implement the utility model as the case may be.
Fig. 1 shows the structural representation of pit shaft in the utility model.
Fig. 2 shows the structural representation of water separator in the utility model.
The Reference numeral of above accompanying drawing: 1, well head part; 11, first flow; 12, the second runner; 2, oil pipe; 3, water separator; 31, the first separating opening; 32, the second separating opening; 4, packer; 5, annular space; 6, sleeve pipe; 10, ground; 20, stratum; 30, oil reservoir; 33, rotational flow separation room; 331, rotational flow separation sheet; 34, dilatation separation chamber; 35, central tube; 351, passage; 36, separate sheet is intercepted; 37, collecting chamber.
Detailed description of the invention
By reference to the accompanying drawings with the description of the utility model detailed description of the invention, can clearly understand details of the present utility model.But detailed description of the invention of the present utility model described here, only for explaining the purpose of this utility model, and can not to be understood as by any way be to restriction of the present utility model.Under instruction of the present utility model, technician can conceive based on distortion possible arbitrarily of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
With reference to shown in Fig. 1, the utility model discloses a kind of pit shaft for reducing heat waste, it comprises sleeve pipe 6, be located in the oil pipe 2 in described sleeve pipe 6, described sleeve pipe 6 and described oil pipe 2 enter stratum 20 from ground 10, stretch into oil reservoir 30 from stratum 20 again, annular space 5 is formed between described sleeve pipe 6 and described oil pipe 2, described pit shaft also comprises the well head part 1 be arranged on above ground 10, described well head part 1 has the first flow 11 for being connected with described oil pipe 2 and the second runner 12 for being connected with described annular space 5, first flow 11 and the second runner 12 isolated, described pit shaft also comprises and to be arranged on above oil reservoir 30 and the packer 4 being positioned at described annular space 5 and the water separator 3 be arranged on above described packer 4, described water separator 3 has the first separating opening 31 and the second separating opening 32, described first separating opening 31 is connected with described annular space 5.
Concrete, sleeve pipe 6 is the tubing strings for supporting oil, the gas well borehole wall, with ensure drilling process carry out with completion after the normal operation of whole oil well.Oil pipe 2 is the tubing strings for steam injection and exploitation.Oil pipe 2 is located in sleeve pipe 6, forms annular space 5 between sleeve pipe 6 and oil pipe 2.The upper end of oil pipe 2 and sleeve pipe 6 passes ground 10, and the lower end of oil pipe 2 and sleeve pipe 6 is stretched into underground from ground 10 and extends in oil reservoir 30.
Well head part 1 is positioned on ground 10, and is arranged on the upper end of oil pipe 2 and sleeve pipe 6.The first flow 11 of well head part 1 is connected to inject steam in oil pipe 2 with oil pipe 2.Second runner 12 of well head part 1 is connected with annular space 5, to be discharged from the second runner 12 by saturation water.First flow 11 and the second runner 12 isolated with guarantee inject steam and saturation water can not mix.
Packer 4 is set between oil pipe 2 and sleeve pipe 6.Packer 4 is positioned at the top of oil reservoir 30, completely cuts off for by oil reservoir 30.
Above packer 4, be also provided with water separator 3, obtain saturation water and dry saturated steam for the steam of injection is carried out separation.Water separator 3 has the first separating opening 31 isolating saturation water and the second separating opening 32 isolating dry saturated steam.First separating opening 31 is connected with annular space 5, to be imported in annular space 5 by isolated saturation water.Second separating opening is connected with oil reservoir, so that isolated dry saturated steam is injected oil reservoir.
Water separator 3 carries out carbonated drink separation by injecting the steam of described oil pipe 2, and by isolated saturation water from the first separating opening 31 discharged to annular space 5.The saturation water entered in annular space 5 derives ground 10 from the second runner 12 of well head part 1 again.In the process, isolated saturation water, outside oil pipe 2, is incubated oil pipe 2, scatters and disappears with the temperature reducing pit shaft, and then reduces the heat waste of pit shaft.
With reference to shown in Fig. 2, water separator 3 comprises the rotational flow separation room 33 and dilatation separation chamber 34 that are communicated with from top to bottom, is provided with rotational flow separation sheet 331 to realize the rotational flow separation of carbonated drink in described rotational flow separation room 33.Rotational flow separation sheet 331 indentation is arranged, can produce repeatedly effect of impact repeatedly to steam.The cross-sectional diameter of described dilatation separation chamber 34 is greater than described rotational flow separation room 33 and is separated with the dilatation realizing carbonated drink; A central tube 35 is also provided with in described dilatation separation chamber 34, described central tube 35 has the passage 351 relative with described rotational flow separation room 33, the passage 351 of described central tube 35 is connected with the second separating opening 32, so that the dry saturated steam through being separated is entered oil reservoir 30.The bottom of described dilatation separation chamber 34 is connected with described first separating opening 31, so that the saturation water through being separated is entered annular space 5.
Wet saturated steam enters described water separator 3 from rotational flow separation room 33.Because rotational flow separation room 33 is provided with rotational flow separation sheet 331, the saturated vapour of annular flow changes flow direction instantaneously under the effect of rotational flow separation sheet 331, produces eddy flow by force.Because described saturated vapour is different with the proportion of water, can produce different centrifugal force when eddy flow, the water that proportion is larger can throw away central axis, and the less steam of proportion flows downward along axis, thus realizes carbonated drink quick separating.After carbonated drink is separated, under gravity, isolated saturation water flows down along rotational flow separation room 33 wall, flows through dilatation separation chamber 34.
Dry saturated steam after being separated from rotational flow separation room 33 enters in dilatation separation chamber 34.The volume of dilatation separation chamber 34 will much larger than the volume of rotational flow separation room 33.Along with the increase of volume moment, steam pressure is declined rapidly.The sudden change of pressure makes steam and water produce different flow velocitys.Under described different in flow rate effect, steam and water and wall produce impact friction, and steam and water can produce different centrifugal force, and the water that proportion is larger can flow down along wall after producing friction with wall, the steam that proportion is less then continues descending, thus realizes carbonated drink quick separating.The isolated water of described carbonated drink flows down along dilatation separation chamber 34 wall under gravity, finally flows to the first separating opening 31.Isolated a part of saturated vapour enters central tube 35, enters oil pipe 2, carry out steam injection from central tube 35 from the second separating opening 32.
In one preferred embodiment, the outer wall of described central tube 35 is provided with and is separated with the obstruct realizing carbonated drink along himself radial obstruct separate sheet 36 extended, described first separating opening 31 is positioned at the below of described obstruct separate sheet 36.Except directly flowing to the steam of central tube 35, also have the steam flow in part dilatation separation chamber 34 to intercept separate sheet 36, this part steam swerves after rushing at rapidly and intercepting separate sheet 36 again.Because saturated vapour and institute have different proportion, saturated vapour and water is movement locus just difference after swerving.The water that proportion is larger can move downward along obstruct separate sheet 36; The steam that proportion is less can go back after shock intercepts separate sheet 36 in bounce-back, and steam just furthermore achieved that carbonated drink separation with water.
Further, be also provided with the collecting chamber 37 be connected with described dilatation separation chamber 34 in the below of described obstruct separate sheet 36, described first separating opening 31 is opened on described collecting chamber 37.Collecting chamber 37 can be collected the saturation water produced, and imports the comparatively stable saturation water of flow velocity in annular space 5.Described obstruct separate sheet 36 is outwards downward-sloping gradually by center, and downward-sloping obstruct separate sheet 36 more can be beneficial to saturation water and flow to the first separating opening 31 from intercepting separate sheet 36.
The pit shaft that the utility model reduces wellbore heat loss can adopt following steam injection method, and it comprises the following steps:
Steam is injected in pit shaft;
Carry out carbonated drink to the steam injected in pit shaft to be separated to obtain saturation water and dry saturated steam;
In annular space 5 between the saturation water lead-in bushing 6 obtained after carbonated drink is separated and oil pipe 2, to make saturation water, oil pipe 2 is incubated;
The dry saturated steam obtained after carbonated drink being separated is introduced in oil reservoir 30;
Drain into ground 10 by counter for the saturation water entering annular space 5, and derive from well head.
Pressure is 17.5Mpa, the high temperature and high pressure steam of temperature 353 DEG C enters in oil pipe 2 from first flow 11, enters water separator 3 and carries out carbonated drink separation.Water separator 3 enters oil reservoir 30 by the isolated dry saturated steam of the second separating opening 32 along oil pipe 2 and carries out steam injection, water separator 3 is 17.5Mpa by the pressure that the first separating opening 31 is separated, temperature is that the saturation water of 353 DEG C is discharged to ground 10 along annular space 5 is counter, and derives ground 10 from the second runner 12.In the process, isolated saturation water, outside oil pipe 2, is incubated oil pipe 2, scatters and disappears with the temperature reducing pit shaft, and then reduces the heat waste of pit shaft.
Each embodiment in this manual all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (7)
1. the pit shaft for reducing heat waste, it comprises sleeve pipe, be located in the oil pipe in described sleeve pipe, described sleeve pipe and described oil pipe stretch in oil reservoir from ground, it is characterized in that: between described sleeve pipe and described oil pipe, form annular space, described pit shaft also comprises the well head part be arranged on above the ground, described well head part has the first flow for being connected with described oil pipe and the second runner for being connected with described annular space, described first flow and described second runner isolated, described pit shaft also comprises and to be arranged on above oil reservoir and the packer being positioned at described annular space and the water separator be arranged on above described packer, described water separator have for separating of go out saturation water the first separating opening and for separating of the second separating opening going out dry saturated steam, described first separating opening is connected with described annular space, described second separating opening is used for being connected with oil reservoir.
2. pit shaft according to claim 1, is characterized in that: described water separator comprises the rotational flow separation room and dilatation separation chamber that are communicated with from top to bottom, and described rotational flow separation indoor are provided with rotational flow separation sheet to realize the rotational flow separation of carbonated drink; The cross-sectional diameter of described dilatation separation chamber is greater than described rotational flow separation room and is separated with the dilatation realizing carbonated drink; In described dilatation separation chamber, be also provided with a central tube, described central tube has the passage relative with described rotational flow separation room, and the bottom of described dilatation separation chamber is connected with described first separating opening.
3. pit shaft according to claim 2, is characterized in that: the passage of described central tube is connected with the second separating opening.
4. pit shaft according to claim 2, is characterized in that: the outer wall of described central tube is provided with and is separated with the obstruct realizing carbonated drink along himself radial obstruct separate sheet extended, described first separating opening is positioned at the below of described obstruct separate sheet.
5. pit shaft according to claim 4, is characterized in that: be also provided with the collecting chamber be connected with described dilatation separation chamber in the below of described obstruct separate sheet, described first separating opening is opened in the bottom of described collecting chamber.
6. pit shaft according to claim 4, is characterized in that: described obstruct separate sheet is outwards downward-sloping gradually by center.
7. pit shaft according to claim 1, is characterized in that: described first flow and described second runner parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587100.4U CN204175268U (en) | 2014-10-11 | 2014-10-11 | For reducing the pit shaft of heat waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587100.4U CN204175268U (en) | 2014-10-11 | 2014-10-11 | For reducing the pit shaft of heat waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175268U true CN204175268U (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420587100.4U Expired - Fee Related CN204175268U (en) | 2014-10-11 | 2014-10-11 | For reducing the pit shaft of heat waste |
Country Status (1)
| Country | Link |
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| CN (1) | CN204175268U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314543A (en) * | 2014-10-11 | 2015-01-28 | 中国石油天然气股份有限公司 | Shaft and method used for reducing heat loss |
-
2014
- 2014-10-11 CN CN201420587100.4U patent/CN204175268U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314543A (en) * | 2014-10-11 | 2015-01-28 | 中国石油天然气股份有限公司 | Shaft and method used for reducing heat loss |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 |