CN117287161A - Self-adjusting multistage steam injection pipe column for thickened oil development - Google Patents
Self-adjusting multistage steam injection pipe column for thickened oil development Download PDFInfo
- Publication number
- CN117287161A CN117287161A CN202210688464.0A CN202210688464A CN117287161A CN 117287161 A CN117287161 A CN 117287161A CN 202210688464 A CN202210688464 A CN 202210688464A CN 117287161 A CN117287161 A CN 117287161A
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- Prior art keywords
- steam injection
- self
- adjusting
- hole
- pipe column
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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.)
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 67
- 238000007789 sealing Methods 0.000 claims description 27
- 239000003814 drug Substances 0.000 claims description 10
- 239000003129 oil well Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 125000003158 alcohol group Chemical group 0.000 claims description 2
- 239000000295 fuel oil Substances 0.000 claims 8
- 239000003921 oil Substances 0.000 claims 1
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/08—Down-hole devices using materials which decompose under well-bore conditions
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a self-adjusting multistage steam injection pipe column for thickened oil development, and belongs to the technical field of oil extraction engineering. The self-adjusting steam injection pipe column comprises a plurality of self-adjusting steam injection pipe columns which are vertically communicated on a steam injection pipe, the bottoms of the steam injection pipe columns are sealed, the self-adjusting steam injection pipe columns comprise a central pipe and an outer pipe, an outer pipe sleeve is fixed outside the central pipe, an adjusting spring a, a sliding sleeve and an adjusting spring b which are sleeved on the central pipe are sequentially arranged between the central pipe and the outer pipe from top to bottom, two ends of the adjusting spring a are respectively connected with a fixed ring a and the sliding sleeve, and two ends of the adjusting spring b are respectively connected with the sliding sleeve and the fixed ring b. The beneficial effects of the invention are as follows: the problem of inaccurate steam distribution can be thoroughly solved technically, and meanwhile, the labor intensity of field operators can be reduced; meanwhile, the possibility of mechanical injury and scalding accidents of field operators is avoided.
Description
Technical Field
The invention relates to a self-adjusting multistage steam injection pipe column for thickened oil development, and belongs to the technical field of oil extraction engineering.
Background
The most effective way for thick oil development is steam huff and puff, so that whether good steam can be used or not and the steam can be injected, and the improvement of the effective utilization rate of the steam is important for thick oil thermal recovery. At present, most of thick oil wells enter a high-pass huff-puff stage, the average huff-puff of the thick oil wells in the old region is 8-9 cycles, and due to the physical property differences of all layers of the oil wells and the overburden effect of steam, the contradiction of all reservoirs is increasingly prominent, the utilization degree of oil reservoirs and the whole development effect are seriously influenced, and the prior art has the following defects:
1. the two layers cannot be injected with steam at the same time, only the lower layer or the upper layer can be injected first, imbalance of the steam injection layer and the well stewing is necessarily caused, so that the heat loss of the steam injection layer is increased, and the thermal recovery effect is poor;
2. the steam injection quantity of the upper layer and the lower layer is realized by means of artificial wellhead ball injection, so that in some cases, the error between the actual steam injection quantity and the designed steam injection quantity of the upper layer and the lower layer is larger due to human error;
3. during steam injection, injection allocation is realized by throwing balls at the thermal production wellhead, and great potential safety hazards exist in operation due to high temperature and high pressure at the wellhead.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a self-adjusting multi-stage steam injection pipe column for thickened oil development, improve the suction profile of an oil well and improve the utilization degree of an oil layer.
The technical scheme of the invention is as follows: a self-adjusting multistage steam injection pipe column for viscous crude development, includes a plurality of self-adjusting steam injection pipe columns that communicate from top to bottom on the steam injection pipeline, steam injection pipeline bottom is sealed, self-adjusting steam injection pipe column includes, center tube and outer tube, and outer tube cover is fixed outside the center tube, from last to being equipped with in proper order between center tube and the outer tube and overlapping and establish adjustment spring a, sliding sleeve and adjustment spring b on the center tube, adjustment spring a both ends are connected solid fixed ring a and sliding sleeve respectively, and sliding sleeve and solid fixed ring b are connected respectively at adjustment spring b both ends, and sliding sleeve sliding connection center tube has through-hole a and through-hole b of relative setting to open respectively on center tube and the outer tube, open through-hole c mobilizable setting in between through-hole a and through-hole b on the sliding sleeve, gu fixed ring b bottom is equipped with the automatic isolation device of fixing on the center tube periphery.
The bottom of the steam injection pipeline is sealed through a plug.
And the top end of the self-adjusting steam injection pipe column is communicated with the steam injection pipeline through an upper joint.
And the bottom end of the self-adjusting steam injection pipe column is communicated with the steam injection pipeline through a lower joint.
The self-adjusting steam injection pipe column is positioned in an oil well casing of the oil well.
The two ends of the outer tube are respectively fixed on the upper joint and the fixed ring b.
The automatic packing device comprises an annular groove fixed on the central tube, the sealing cylinder is fixed on the central tube through the annular groove, the end part of the sealing cylinder is provided with an inclined plane a, the inclined plane a is opposite to the outer wall of the central tube, the piston is connected with the outer wall of the central tube in a sliding mode, the end part of the piston is provided with an inclined plane b matched with the inclined plane a, the other end of the piston and the annular groove are surrounded to form a sealed medicament chamber, and an expansion medicament is filled in the medicament chamber.
The swelling agent is alcohol.
An inner balance hole is formed in the central tube where the adjusting spring a is located, an outer balance hole is formed in the outer tube, and the outer balance hole is opposite to the adjusting spring b.
The sealing cylinder is a degradable sealing cylinder.
The beneficial effects of the invention are as follows: the problem of inaccurate steam distribution can be thoroughly solved technically, and meanwhile, the labor intensity of field operators can be reduced; meanwhile, the possibility of mechanical injury and scalding accidents of field operators is avoided.
1. Realize the simultaneous steam injection of multilayer, make the braising well balanced, rational utilization heat energy.
2. According to the pressure of stratum and the variation condition of steam injection pressure, the steam injection aperture can be automatically adjusted, and the accuracy of the steam quantity of each layer is ensured.
3. The pipe column is simple in structure and convenient to operate.
4. The automatic sealing of the steam injection unit is realized, the sealing is tight, and the pollution of an oil layer is avoided after the rubber cylinder is degraded.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Reference numerals in the drawings are as follows: 1. the device comprises an upper joint, a lower joint, a central tube, an outer balance hole, a regulating spring a, a regulating spring 6, a sliding sleeve 7, a regulating spring b, a regulating spring 8, a fixing ring a, a fixing ring 9, a fixing ring b, a fixing ring 10, an outer tube, a through hole 11, a through hole a,12, a through hole b,13, a through hole c,14, an annular groove, 15, a sealing cylinder, 16, a piston, 17, an annular groove, 18, an inner balance hole, 19 and an expanding medicament.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present invention, and from which other drawings can be obtained by those skilled in the art without inventive faculty.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the sectional view of the device structure is not partially enlarged to general scale for the convenience of description, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
The invention is described in further detail below with reference to fig. 1 and the specific examples: this is taken as an example to describe the present application further.
A self-adjusting multistage steam injection pipe column for thickened oil development comprises a plurality of self-adjusting steam injection pipe columns which are vertically communicated on a steam injection pipeline, the bottoms of the steam injection pipelines are sealed, the self-adjusting steam injection pipe columns comprise a central pipe 3 and an outer pipe 10, the outer pipe 10 is sleeved and fixed outside the central pipe 3, an adjusting spring a5, a sliding sleeve 6 and an adjusting spring b7 which are sleeved and arranged on the central pipe 3 are sequentially arranged between the central pipe 3 and the outer pipe 10 from top to bottom, two ends of the adjusting spring a5 are respectively connected with a fixed ring a8 and the sliding sleeve 6, two ends of the adjusting spring b7 are respectively connected with the sliding sleeve 6 and a fixed ring b9, the sliding sleeve 6 is in sliding connection with the central pipe 3, the central pipe 3 and the outer pipe 10 are respectively provided with a through hole a11 and a through hole b12 which are oppositely arranged, the sliding sleeve 6 is provided with a through hole c13, the through hole c13 is movably arranged between the through hole a11 and the through hole b12, the through hole a11 and the through hole b12 are in a collinear way, the through hole c13 is positioned below the central line of the through hole a11 and the through hole b12 in the initial state, namely the through hole c13 is staggered with the through hole a11 and the through hole b12, the through hole c13 is in the initial state, the through hole c13 is in a position and the through hole b12 is in a staggered mode, the composite opening is under the action of the through hole c13 and the through hole b 13 is under the action, and the automatic opening and the through hole 13 is in the automatic opening, and the bottom opening is formed by the through hole 13 and the through hole 13, and the through hole 13 is automatically and the through hole 13 and the through hole 3.
The bottom of the steam injection pipeline is sealed by a plug, so that steam is prevented from flowing out from the position without an oil layer at the bottom.
The top end of the self-adjusting steam injection pipe column is communicated with a steam injection pipeline through an upper joint 1. The top end of the self-adjusting steam injection pipe column is connected with the steam injection pipeline into a whole.
The bottom end of the self-adjusting steam injection pipe column is communicated with the steam injection pipeline through a lower joint 2. The bottom end of the self-adjusting steam injection pipe column is connected with the steam injection pipeline into a whole.
The two ends of the outer tube 10 are respectively fixed on the upper joint 1 and the fixed ring b9, and the upper joint 1 and the fixed ring b9 are both fixed on the central tube, so that the relative positions of the outer tube 10 and the central tube 3 are fixed, and the relative positions of the through hole a11 and the through hole b12 are fixed.
The automatic packing device comprises an annular groove 14 fixed on the central tube 3, a sealing cylinder 15 is fixed on the central tube 3 through the annular groove 14, an inclined plane a is arranged at the end part of the sealing cylinder 15, the inclined plane a is opposite to the outer wall of the central tube 3, a piston 16 is connected with the outer wall of the central tube 3 in a sliding mode, an inclined plane b matched with the inclined plane a is arranged at the end part of the piston 16, a sealed medicament chamber is formed by encircling the other end of the piston 16 and the annular groove 17, and an expansion medicament 19 is filled in the medicament chamber. The expansion agent 19 is heated and expands to push the piston 16 to move towards the sealing cylinder 15, the other end of the sealing cylinder 15 is fixed on the annular groove, so that the sealing cylinder 15 is extruded and deformed and expands outwards along the radial direction of the central pipe 3, the self-adjusting steam injection pipe column is positioned in a petroleum casing of an oil well, and the periphery of the deformed sealing cylinder 15 is contacted with the inner wall of the petroleum casing, and finally forms a seal.
The swelling agent 19 is alcohol.
An inner balance hole 18 is formed in the central tube 3 where the adjusting spring a5 is located, so that the pressure of the area where the adjusting spring a5 is located is the same as the pressure in the central tube 3, an outer balance hole 4 is formed in the outer tube 10, the outer balance hole 4 is opposite to the adjusting spring b7, and the pressure of the outer tube 10 is the same as the pressure of the area where the adjusting spring b7 is located.
The working process of the invention comprises the following steps:
the through hole b12 is opposite to the oil layer, steam entering the steam injection pipeline is injected from the air inlet at the top of the central pipe 3, flows out from the through hole a11, the through hole c13 and the through hole b12, enters the oil layer, after a period of steam injection, the temperature of the oil layer is increased, the pressure is increased, the air outlet resistance is increased, the pressure at the bottom end of the sliding sleeve 6 is increased, the sliding sleeve 6 is pushed upwards, the through hole c13 moves upwards along with the sliding sleeve 6, the composite opening of the through hole a11, the through hole c13 and the through hole b12 is increased, and under the condition that the air outlet resistance is increased and the air outlet speed is slowed down, the size of the air outlet is increased, the automatic regulation of the air outlet flow is realized, and the purpose of quantitatively injecting steam is achieved. Conversely, when the oil layer pressure becomes smaller, the air outlet resistance is also small, the steam air outlet flow rate can be accelerated, at the moment, the pressure at the bottom end of the sliding sleeve 6 is reduced, the sliding sleeve 6 moves downwards, the through hole c13 moves downwards along with the sliding sleeve 6, the composite openings of the through hole a11, the through hole c13 and the through hole b12 are reduced, and the steam air outlet is reduced under the condition that the steam air outlet flow rate is accelerated, so that the steam air outlet flow rate is regulated, and the purpose of quantitative steam injection is achieved.
In order to prevent random flow of steam in the petroleum casing pipe and interference of steam injection to oil layers at different depths, the petroleum casing pipe needs to be sealed and isolated, and the invention can realize automatic sealing through an automatic sealing device, specifically, after steam injection, the temperature of the wall of the central pipe 3 is increased, so that the expansion agent 19 in the agent chamber is heated and expanded, the piston 16 is pushed to move upwards, the sealing cylinder 15 is extruded, the sealing cylinder 15 is deformed and expanded outwards along the radial direction of the central pipe 3, the periphery of the deformed sealing cylinder 15 is contacted with the inner wall of the petroleum casing pipe, and finally sealing is formed. After the steam injection is finished, the tube bundle is lifted up, the sealing cylinder 15 is broken and broken under the action of external force, the unsealing is finished, the broken sealing cylinder 15 falls into the well, the sealing cylinder 15 is a degradable sealing cylinder which is made of composite high polymer material, and the main component (C 3 H 4 O 2 ) n The material is slowly degraded at a temperature of above 350 ℃ and a certain temperature of 120 ℃ for about one year, and the main product is H 2 O、CO 2 Zero pollution to stratum is realized.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (10)
1. A be used for multistage vapour pipe column of self-interacting of viscous crude development, a serial communication port, including a plurality of self-interacting vapour pipe columns of upper and lower intercommunication on the vapour injection pipeline, vapour pipe pipeline bottom is sealed, self-interacting vapour pipe column includes, center tube (3) and outer tube (10), outer tube (10) cover is established and is fixed outside center tube (3), be equipped with between center tube (3) and outer tube (10) from last to being equipped with down in proper order and overlap adjustment spring a (5) on center tube (3), sliding sleeve (6) and adjustment spring b (7), fixed ring a (8) and sliding sleeve (6) are connected respectively at adjustment spring a (5) both ends, sliding sleeve (6) and fixed ring b (9) are connected respectively at adjustment spring b (7) both ends, open respectively on center tube (3) and outer tube (10) through-hole a (11) and through-hole b (12) that set up relatively, it has through-hole c (13) to open on sliding sleeve (6), through-hole c (13) mobilizable set up is equipped with fixed periphery in between through-hole a (11) and through-hole b (12) and fixed ring b (9) and seal outside the center tube (3).
2. The self-adjusting multi-stage steam injection string for heavy oil development of claim 1, wherein the bottom of the steam injection pipeline is sealed by a plug.
3. The self-adjusting multistage steam injection pipe column for heavy oil exploitation according to claim 1, wherein the top end of the self-adjusting steam injection pipe column is communicated with a steam injection pipeline through an upper joint (1).
4. The self-adjusting multistage steam injection pipe column for heavy oil exploitation according to claim 1, wherein the bottom end of the self-adjusting steam injection pipe column is communicated with a steam injection pipeline through a lower joint (2).
5. The self-adjusting multi-stage steam injection string for heavy oil development of claim 1, wherein the self-adjusting steam injection string is located within a petroleum casing of an oil well.
6. A self-adjusting multistage steam injection string for heavy oil development according to claim 3, characterized in that the two ends of the outer tube (10) are fixed on the upper joint (1) and the fixing ring b (9), respectively.
7. The self-adjusting multistage steam injection string for thickened oil development according to claim 1, wherein the automatic packing device comprises an annular groove (14) fixed on a central tube (3), a sealing cylinder (15) is fixed on the central tube (3) through the annular groove (14), an inclined surface a is arranged at the end part of the sealing cylinder (15), the inclined surface a is opposite to the outer wall of the central tube (3), a piston (16) is connected with the outer wall of the central tube (3) in a sliding manner, an inclined surface b matched with the inclined surface a is arranged at the end part of the piston (16), a sealed medicament chamber is formed by the other end of the piston (16) and the annular groove (17) in a surrounding mode, and an expanding medicament (19) is filled in the medicament chamber.
8. The self-adjusting multi-stage steam injection string for heavy oil development of claim 7, wherein the swelling agent is alcohol.
9. The self-adjusting multistage steam injection pipe column for heavy oil exploitation according to claim 1, wherein the central pipe (3) where the adjusting spring a (5) is located is provided with an inner balance hole (18), the outer pipe (10) is provided with an outer balance hole (4), and the outer balance hole (4) is opposite to the adjusting spring b (7).
10. Self-adjusting multistage steam injection string for heavy oil development according to claim 1, characterized in that the sealing cylinder (15) is a degradable sealing cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210688464.0A CN117287161A (en) | 2022-06-17 | 2022-06-17 | Self-adjusting multistage steam injection pipe column for thickened oil development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210688464.0A CN117287161A (en) | 2022-06-17 | 2022-06-17 | Self-adjusting multistage steam injection pipe column for thickened oil development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117287161A true CN117287161A (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210688464.0A Pending CN117287161A (en) | 2022-06-17 | 2022-06-17 | Self-adjusting multistage steam injection pipe column for thickened oil development |
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| Country | Link |
|---|---|
| CN (1) | CN117287161A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118065821A (en) * | 2024-04-25 | 2024-05-24 | 克拉玛依三盛有限责任公司 | Stress deformation prevention repairing mechanism for multi-wheel steam injection of thickened oil well |
-
2022
- 2022-06-17 CN CN202210688464.0A patent/CN117287161A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118065821A (en) * | 2024-04-25 | 2024-05-24 | 克拉玛依三盛有限责任公司 | Stress deformation prevention repairing mechanism for multi-wheel steam injection of thickened oil well |
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