CN106194138B - Mechanical heat insulation type horizontal well steam injection pipe column - Google Patents
Mechanical heat insulation type horizontal well steam injection pipe column Download PDFInfo
- Publication number
- CN106194138B CN106194138B CN201610812065.5A CN201610812065A CN106194138B CN 106194138 B CN106194138 B CN 106194138B CN 201610812065 A CN201610812065 A CN 201610812065A CN 106194138 B CN106194138 B CN 106194138B
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- CN
- China
- Prior art keywords
- steam injection
- heat
- pipe column
- heat insulation
- horizontal well
- 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.)
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 44
- 238000009413 insulation Methods 0.000 title abstract description 34
- 238000000926 separation method Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 14
- 239000003129 oil well Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000009747 swallowing Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/003—Insulating arrangements
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a mechanical heat insulation type horizontal well steam injection pipe column, which comprises a steam injection pipe column and is characterized in that a heat insulation steam injection device is connected in series on the steam injection pipe column, and the device consists of a thermal packer and a radial positioning mechanism of a ball blocking separator arranged on a central pipe of the thermal packer. After the invention is realized, because the heat-insulating steam injection device is arranged, mechanical heat-insulating treatment can be carried out on each casing of the horizontal well according to the use requirement, compared with the prior art, the invention can effectively reduce the heat-insulating cost of the horizontal well casing, improve the heat-insulating quality and simplify the heat-insulating operation.
Description
Technical Field
The invention relates to steam huff and puff equipment of a thermal production well, in particular to a mechanical heat insulation type horizontal well steam injection pipe column.
Background
At present, in the field of oil exploitation, the main method for thinning thick oil is a steam swallowing and spitting method, and a device for realizing the method is steam swallowing and spitting equipment, wherein the equipment consists of a steam boiler and a steam injection pipe column, and the steam injection pipe column consists of a heat insulation pipe, a telescopic pipe, an oil pipe and the like. When the steam handling equipment is installed, the steam injection pipe column is conveyed to a preset underground position through the inner hole of the oil well casing pipe, and the upper end of the steam injection pipe column is fixedly connected with the exhaust port of the ground steam boiler. The implementation of the steam swallowing and spitting method firstly needs to solve the problem of the heat insulation of the oil well casing, namely, the method is used for preventing the steam under the injection well from reversely entering a heat insulation area, namely an upper end space area formed between the excircle of a steam injection pipe column and the inner hole of the oil well casing, so that the oil well casing is prevented from deforming and damaging under the action of high temperature, and the oil well casing cannot be operated under the safe condition. Currently, for horizontal wells, the oil well casing insulation method adopted by people is mainly a nitrogen insulation method, namely, a special device is used for filling nitrogen into an insulation area. The main problem of the oil well casing heat insulation method is high implementation cost; secondly, the nitrogen is injected for 1 to 2 times according to the loss condition of the nitrogen in the steam injection period, and the operation is troublesome.
In the prior art, a mechanical thermal insulation method for insulating a vertical well section casing of a vertical well or a horizontal well is also invented, and the method is realized by a thermal packer which is arranged in a steam injection pipe column and has double functions of thermal insulation and selective injection. The packer consists of a central pipe and a setting component arranged on the excircle of the central pipe. In application, the thermal packer can automatically block an annular gap formed between an inner hole of the oil well casing and the outer circle of the steam injection pipe column at the position of the thermal packer under the action of heat energy of injected steam, and the annular gap is also called as 'seat sealing' to prevent the steam from entering the heat insulation area, so that the purpose of heat insulation of the oil well casing is achieved. Compared with a nitrogen heat insulation method, the heat insulation method has the outstanding characteristics of low implementation cost and remarkable heat insulation effect. However, since such a thermal packer does not have a radial positioning function, it is not easy to be installed in a horizontal direction, in other words, if it is installed in a horizontal section steam injection string of a horizontal well, it is not possible to ensure the horizontal direction and the horizontal section steam injection string are coaxial with each other, and it is difficult to obtain an ideal setting effect.
In addition, in the prior art, a downhole tool for oil reservoir selection and injection operation, namely a ball blocking barrier is invented. The blocking ball separator consists of a central tube and a radial positioning mechanism which is arranged on the excircle of the central tube and has an elastic supporting function. In the application, the setting quantity of stifled ball separation ware is no less than two to be established ties on the preset position of notes steam pipe post through its center tube respectively, be used for with a plurality of light "stifled ball" separation between two adjacent stifled ball separation wares, make stifled ball can form the shutoff to this oil well casing perforation under the air current effect of injected steam, make this oil reservoir exempt from to inject steam, thereby reach the oil reservoir and select attention.
Disclosure of Invention
The invention aims to provide a mechanical heat insulation type horizontal well steam injection pipe column for people, so that the heat insulation operation cost of a horizontal well casing pipe is reduced and the heat insulation effect is improved.
The invention is realized by the following steps that the thermal-insulation steam injection device is connected in series on the steam injection pipe column, and the thermal-insulation steam injection device consists of a thermal packer and a radial positioning mechanism of a ball-blocking separator arranged on a central pipe of the thermal-insulation steam injection pipe column.
After the invention is realized, because the heat-insulating steam injection device is arranged, mechanical heat-insulating treatment can be carried out on each casing of the horizontal well according to the use requirement, compared with the prior art, the invention can effectively reduce the heat-insulating cost of the horizontal well casing, improve the heat-insulating quality and simplify the heat-insulating operation.
Drawings
Fig. 1 is a schematic diagram of one form of the present invention.
Fig. 2 is a schematic view of the structure of the heat-insulating steam injection device of the present invention.
Detailed Description
Fig. 1 shows an embodiment of the present invention. It can be seen from the figure that the steam injection pipe column comprises an existing steam injection pipe column, wherein the steam injection pipe column comprises a heat insulation pipe 1, a telescopic pipe 3, an oil pipe 6 and the like, and is characterized in that a heat insulation steam injection device 5 is connected in series between oil pipe sections of the steam injection pipe column, and the heat insulation steam injection device comprises a thermal packer and a radial positioning mechanism of a ball blocking separator arranged on a central pipe of the thermal packer.
As can be seen from FIG. 2, the basic configuration of the above-described thermal packer is identical to that of the prior art. The outer part of the right side of the central tube is provided with a soft expansion ring 10 and an axial positioning component thereof, and the positioning component consists of an upper joint 7, a pressing cap 9 and a sealing blocking sleeve 11; the outside of the left central tube of the soft expanding ring is provided with a thermal hydraulic cylinder through a locking ring 20 and the like, and the thermal hydraulic cylinder respectively consists of a cylinder body, a piston 16 and a thrust head thereof, and thermal expansion liquid 17. The cylinder body consists of a cylinder barrel 18 and a cylinder cover 19, and the piston thrust head consists of a stop outer ring 12, a stop inner ring 14, an outer sleeve 15 and a compensation spring 13. A ratchet type non-return mechanism is arranged between the piston thrust head and the central tube, the piston thrust head is matched with the inner hole of the soft expansion ring, and the piston thrust head and the inner hole form a radial expansion mechanism of the soft expansion ring. In addition, the left end of the central pipe 8 is provided with an external thread, and an internal thread is arranged in the inner hole of the upper joint 7, and the internal thread and the external thread form an abutting piece connecting structure.
As can be seen from fig. 2, the radial positioning mechanism of the ball-plugging stopper is fixedly arranged on the outer part of the left side of the central tube through a positioning cap 25, and the mechanism is completely the same as the prior art. The device comprises a pair of limit caps 26 and a plurality of support blocks 21 positioned between the limit caps, wherein a radial sliding mechanism and an elastic support mechanism are arranged between the support blocks and a central tube 8, and a radial anti-falling mechanism is arranged between the outer sides of the inner ends of the support blocks and the inner circular surface of the peripheral wall of the limit caps; the end surfaces of the two axial sides of the supporting block are matched with the inner end surface of the limiting cap at the same side, and the supporting block and the limiting cap form sliding contact.
The middle part of the supporting block 21 is provided with a guide hole which is matched with a guide post 22 fixed on the central tube and is in sliding contact with the central tube, and the guide hole and the guide post form a radial sliding mechanism of the supporting block.
Thrust spring positioning holes are formed in two sides of the guide hole of the supporting block 21, and a thrust spring 23 is arranged between the spring positioning holes and the excircle of the central tube, so that an elastic supporting mechanism of the supporting block is formed.
The inner end of the supporting block 21, namely the left side and the right side close to the axis of the central tube 8, are provided with outer convex bodies 24, the outer convex bodies are matched with the inner circular surfaces of the peripheral walls of the limiting caps on the same side, and when the supporting block moves outwards in the radial direction to the limiting position, the supporting block and the limiting caps form clamping stagnation contact so as to prevent the supporting block from being separated from the limiting caps, thereby forming the radial anti-disengaging mechanism of the supporting block.
It should be noted that the form of the structure of the present invention shown in fig. 1 is not exclusive. Such as: according to the actual use requirement, the heat insulation steam injection device 5 can also be connected in series between the heat insulation pipe sections of the vertical section of the horizontal well.
It should also be noted that the form of construction of the insulated steam injection unit shown in fig. 2 is not exclusive. For example: the invention can also be used by integrating the cylinder 18 with the cylinder cover 19 or by integrating the stop outer ring 12 with the outer sleeve 15, which are components of the piston thrust block, and by eliminating the spring 9.
The invention uses the installation method and the working principle thereof:
the use and installation method comprises the following steps:
according to the use requirement, the heat-insulating steam injection device 5 is connected in series in a steam injection pipe column through an adjacent piece connecting structure, then the heat-insulating steam injection device is inserted into the inner hole of the upper oil well casing 2 and is sent to a preset underground position, and then the upper end of the heat-insulating pipe 1 is fixedly connected with the exhaust port of the ground steam boiler. In the present embodiment, the downhole location of the present invention is shown in fig. 1, which shows the thermal insulation steam injection device 5 located at the front of the lower well casing 4, i.e., at the left-hand location as shown.
The working principle is as follows: after the invention is sent into the underground, the radial positioning mechanism of the ball blocking separator of the heat insulation steam injection device 5 automatically realizes radial positioning with the inner hole of the oil well casing pipe at the position under the action of the supporting spring 23 and the supporting block 21, so that the two parts keep coaxial. When steam is injected, the thermal packer of the thermal insulation steam injection device 5 extends the piston rightwards under the pushing of the thermal expansion liquid 17 under the action of steam heat energy, so that the soft expansion ring 10 expands outwards under the action of the internal supporting force of the piston thrust head, and an annular gap formed between the outer surface of the oil pipe at the position of the soft expansion ring and the inner surface of the oil well casing is sealed, and the purpose of mechanical thermal insulation is achieved.
Claims (1)
1. The utility model provides a machinery thermal-insulated formula horizontal well steam injection tubular column, includes the steam injection tubular column, this steam injection tubular column includes thermal-insulated pipe, flexible pipe, oil pipe, and thermal-insulated steam injection device has established ties between the oil pipe of this steam injection tubular column which characterized in that, the device comprises the radial positioning mechanism of thermal packer and the stifled ball separation ware of setting on its central siphon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812065.5A CN106194138B (en) | 2016-08-27 | 2016-08-27 | Mechanical heat insulation type horizontal well steam injection pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812065.5A CN106194138B (en) | 2016-08-27 | 2016-08-27 | Mechanical heat insulation type horizontal well steam injection pipe column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106194138A CN106194138A (en) | 2016-12-07 |
| CN106194138B true CN106194138B (en) | 2020-05-12 |
Family
ID=58067424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610812065.5A Active CN106194138B (en) | 2016-08-27 | 2016-08-27 | Mechanical heat insulation type horizontal well steam injection pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106194138B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222852A (en) * | 2016-12-21 | 2018-06-29 | 中国石油天然气股份有限公司 | Horizontal well steam injection tubing string |
| CN107060711A (en) * | 2017-01-19 | 2017-08-18 | 郭立波 | A kind of horizontal well sectional steam injection pipe column |
| CN111691849B (en) * | 2020-07-14 | 2021-11-02 | 中国石油集团渤海钻探工程有限公司 | Technological method for solving deformation of casing pipe at paste-salt layer section |
| CN114135261A (en) * | 2021-11-12 | 2022-03-04 | 中国石油天然气股份有限公司 | Supercritical steam huff-puff well heat-insulation steam injection pipe column and gas injection method |
| CN115354985B (en) * | 2022-06-29 | 2023-12-29 | 中国地质大学（武汉） | Thermal injection well thermosensitive casing protection method and device |
-
2016
- 2016-08-27 CN CN201610812065.5A patent/CN106194138B/en active Active
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| Publication number | Publication date |
|---|---|
| CN106194138A (en) | 2016-12-07 |
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| DD01 | Delivery of document by public notice |
Addressee: Guo Xinzhu Document name: Notification of Publication and of Entering the Substantive Examination Stage of the Application for Invention |
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