CN114251077B - Double packer steam injection integrated device and method for oil field thick oil exploitation - Google Patents
Double packer steam injection integrated device and method for oil field thick oil exploitation Download PDFInfo
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- CN114251077B CN114251077B CN202210188872.XA CN202210188872A CN114251077B CN 114251077 B CN114251077 B CN 114251077B CN 202210188872 A CN202210188872 A CN 202210188872A CN 114251077 B CN114251077 B CN 114251077B
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- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 113
- 239000011229 interlayer Substances 0.000 claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 18
- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 81
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 37
- 238000003825 pressing Methods 0.000 claims description 36
- 239000004576 sand Substances 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 23
- 239000000295 fuel oil Substances 0.000 claims description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 19
- 239000001569 carbon dioxide Substances 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 210000002445 nipple Anatomy 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 8
- 239000003129 oil well Substances 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 14
- 238000012856 packing Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- -1 compound carbon dioxide Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- E21B33/122—Multiple string packers
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
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- 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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the field of oil field thick oil exploitation equipment, in particular to a double packer steam injection integrated device and method for oil field thick oil exploitation. The technical scheme is as follows: the lower end of the upper packer is connected with the lower packer through an interlayer spacing pipe and a connecting core pipe, and the lower end of the steam injection valve is provided with a seat packer and a one-way oil extractor; go up the inner chamber installation core tube of giving up the packer, the lower extreme connecting layer spacer tube of core tube of giving up, connect core tube, compensation core tube, the lower extreme of compensation core tube passes down the packer and is connected to the seat and annotates the vapour stopper, and the downside of ball seat is equipped with the seat and seals the ware, and the seat seals the ware through locking constant force round pin fixed connection at the casing inner chamber of annotating the vapour valve, and beneficial effect is: the invention is put into the well once, so that the seat sealing of two oil layers is reliable, the loss of injected substances and energy during steam injection is avoided, the steam injection efficiency is improved, meanwhile, the corrosion to an oil well casing is reduced, and the service life of an oil well is prolonged; the construction procedures are reduced, the labor intensity of workers is reduced, and the construction period is shortened.
Description
Technical Field
The invention relates to the field of equipment and a method for exploiting thick oil in an oil field, in particular to a double packer steam injection integrated device and a double packer steam injection integrated method for exploiting thick oil in an oil field.
Background
In the process of oil exploitation, a large number of thick oil wells exist, so that thick oil plays an important role in oil exploitation, and because thick oil has the characteristics of long molecular chain hydrocarbon and heavy molecular weight, the formed viscosity is high and the flowability is poor, so that the thick oil has the characteristic of great difficulty in thick oil development. At present, the heavy oil is mainly mined in a thermal recovery mode, and because the viscosity of the heavy oil is very sensitive relative to the temperature, the viscosity of the heavy oil is obviously reduced when the temperature is increased within a certain temperature range, and the viscosity of the heavy oil is reduced by about one half when the temperature is increased by 10 ℃; when the long chain structure in the thick oil is completely destroyed, the viscosity of the thick oil is reduced very little along with the rise of the temperature, namely, the temperature is continuously increased and the viscosity of the thick oil is reduced very little when exceeding a certain temperature range. Therefore, the current common method is to inject a certain amount of high-temperature composite carbon dioxide steam into the heavy oil layer, and reduce the viscosity of the heavy oil in the oil reservoir by soaking for a period of time, so that the method is an effective method for exploiting the heavy oil.
In addition, there are also some heavy oil wells whose downhole reservoir morphology is: the upper strata is water, and the lower floor is the viscous crude, like this, at compound carbon dioxide's steam injection in-process, because the upper strata is sealed not tight, when injecting compound carbon dioxide's steam to the lower floor, often the upper strata can absorb a large amount of steam, can cause a large amount of heats and the waste of injecting the material like this, simultaneously, because carbon dioxide and water can take place following reaction: CO 22+H2O=H2CO3The generated carbonic acid is unstable and can generate hydrogen ions and bicarbonate ions to further corrode the metal casing, so that the service life of the oil well is shortened, and great economic loss is caused; moreover, when two packers are put in, the mode of putting in for multiple times is adopted, so that the construction procedures are increased, the labor intensity of workers is increased, the construction period is prolonged, and the problem of sealing failure is easily caused by multiple butt joints, so that a large amount of heat and waste of injected substances are caused.
Disclosure of Invention
The invention aims to provide a double packer steam injection integrated device and a method for oil field thick oil exploitation aiming at the defects in the prior art, wherein two packers are used for sealing the water layer at the upper part at one time, the whole pipe column is connected through a locking constant force pin, the whole pipe column is lowered to a set position, the two packers are simultaneously sealed by pressing the seat seals, then a channel is opened for steam injection, after the steam injection is completed, the well is stewed, then a release is taken out, and the production pipe column is lowered; when steam needs to be injected again, the tubular column can be put into the steam injection process again, and the steam injection process can be realized for many times.
The invention provides a double packer steam injection integrated device for oil field thick oil exploitation, which adopts the technical scheme that: including last packer, lower packer and steam injection valve, go up the lower extreme of packer and install down the packer, steam injection valve is installed to the lower extreme of lower packer, wherein: the lower end of the upper packer is connected with the lower packer through the interlayer spacing pipe and the connecting core pipe, and the seat packer and the one-way oil extractor are installed at the lower end of the steam injection valve;
a releasing core tube is arranged in the inner cavity of the upper packer, the upper end of the releasing core tube is connected with a releasing upper joint, the lower end of the releasing core tube is connected with an interlayer inner spacer tube of the interlayer spacer tube, the lower end of the interlayer inner spacer tube is connected with a compensating core tube through a connecting core tube, the lower end of the compensating core tube penetrates through the lower packer to be connected to a seat seal steam injection plug, a ball seat is connected with the seat seal steam injection plug through a shear pin, a seat seal device is arranged on the lower side of the ball seat, and the seat seal device is fixedly connected to the inner cavity of a shell of the steam injection valve through a locking constant force pin;
the seat sealer is of a concave groove structure and is provided with a plurality of through holes, a plurality of one-way steam injection valves are arranged on a steam injection body on the lower side of each steam injection valve, a one-way oil extractor is connected to the lower end of each steam injection valve, an oil extraction sealing cylinder, a one-way valve, a sand filtering layer and a sand filtering core pipe are arranged in each one-way oil extractor, a protruding oil extraction sealing cylinder is arranged outside each sand filtering core pipe, the lower end of each sand filtering core pipe is connected with a blind plug, a plurality of one-way valves are arranged in each oil extraction sealing cylinder, and the sand filtering layer is arranged on the lower side of each one-way valve.
Preferably, the upper packer comprises a setting piston, a pushing nipple, a fishing head, a first setting shear pin, a first locking spring, a rubber cylinder upper pressing sleeve, a first central pipe, a rubber cylinder liner pipe, a first sealing rubber cylinder, a rubber cylinder lower pressing sleeve, an upper cone, a slip, a plate spring, a lower cone, a slip sleeve, a lower cone retaining ring, a lower joint and a retaining ring, wherein the upper end of the pushing nipple is provided with the setting piston and is arranged in a cavity formed between the outer wall of the releasing core pipe and the releasing upper joint; the lower extreme outside that bulldozes the nipple joint is connected and is pressed the cover on the packing element, and the inner is connected with the fishing head through first seat shear pin, the lower extreme and the first center tube of fishing head are connected, and presses cover, packing element bushing pipe, first sealed packing element, packing element to press down the cover, go up centrum, slips, leaf spring, centrum and lower centrum shelves ring to be located the outer wall of first center tube on the packing element, and the lower extreme and the packing element bushing pipe cooperation of pressing the cover on the packing element are connected, and the outside of packing element bushing pipe is equipped with first sealed packing element and presses down the cover, the centrum is gone up in the lower extreme contact of packing element pressing down the cover, goes up and is equipped with the slips between centrum and the lower centrum, and the slips outside is equipped with the leaf spring.
Preferably, the upper end and the lower end of the slip are of conical structures and are used for being matched with an upper cone body and a lower cone body, slip sleeves are arranged on the outer sides of the upper cone body and the lower cone body and used for limiting the slip to move between the upper cone body and the lower cone body, grooves are formed in the outer sides of the slip, plate springs are arranged in the grooves, and external teeth are fixed on the outer sides of the plate springs and used for being locked with the casing wall.
Preferably, the upper side of the releasing core tube is provided with a first air inlet hole which is positioned on the upper side of the seat sealing piston, and two sides of the seat sealing piston are provided with sealing rings; the upper pressing sleeve of the rubber cylinder is in sliding fit with the outer wall of the first central pipe through a first lock spring; the lower end of the first central pipe is connected with a lower joint through a lower cone, the outer wall of the lower joint is provided with a baffle ring, the outer side of the lower end of the lower joint is movably connected with an interlayer outer partition pipe, and the inner end of the lower joint is hermetically connected with the outer wall of the lower end of the releasing core pipe.
Preferably, foretell connection core pipe includes compensation overcoat, two public connectors and outer tube, and the upper end of compensation core pipe is through two public connectors connection compensation overcoat, the outer spacer tube in upper end connecting layer of outer tube, the lower extreme of outer tube is connected the center tube top connection of packer down.
Preferably, the lower packer comprises a central pipe upper joint, a second central pipe, a sealing piston, a second locking spring sleeve, a second seat sealing shear pin, a second sealing rubber cylinder, a deblocking stop ring, a deblocking shear pin and a limiting stop ring, wherein the upper end of the second central pipe is connected with the central pipe upper joint, and the lower end of the second central pipe is connected with the steam injection valve; the sealing piston is arranged in a cavity between the second central pipe and the upper joint of the central pipe, and a second sealing rubber cylinder is arranged between the lower end of the sealing piston and the deblocking ring; an unsealing shear pin is arranged between the unsealing baffle ring and the second central pipe, and a limiting baffle ring is arranged on the lower side of the unsealing baffle ring; the lower end of the upper joint of the central pipe is movably connected with a second lock spring sleeve, the second lock spring sleeve is connected with the outer wall of the sealing piston through a second seat seal shear pin, and the second lock spring is connected with the outer wall of the sealing piston.
Preferably, a third air inlet hole is formed in the upper side of the second central tube, the third air inlet hole is located in the upper side of the sealing piston, and a sealing ring is arranged at the upper end part of the sealing piston; and a second air inlet hole is formed in the lower side of the compensation core pipe.
Preferably, the outer side of the check valve is of an inclined surface structure and is in sliding fit with an inclined surface opening at the lower end of the oil extraction sealing cylinder; and a fourth air inlet is arranged on the sand filtering core pipe and is communicated with the oil extraction sealing cylinder through the fourth air inlet.
The invention provides a using method of a double packer steam injection integrated device for oil field thick oil exploitation, which adopts the technical scheme that the using method comprises the following steps:
firstly, a setting process: a seat sealing steel ball is thrown in from a well mouth, high-pressure gas starts to be thrown in after the seat sealing steel ball falls on a ball seat, the high-pressure gas enters an interlayer inner partition pipe along an inner cavity of a releasing core pipe and then enters a compensating core pipe, the seat sealing steel ball seals the ball seat, so the high-pressure gas enters a cavity between the compensating core pipe and a second center pipe along a second air inlet hole, a sealing piston is pushed to move downwards through a third air inlet hole of the second center pipe to shear a second seat sealing shear pin, the sealing piston drives a second locking spring to move along a second locking spring sleeve and lock, and the sealing piston pushes a second sealing rubber sleeve to expand to realize seat sealing of a lower packer; in addition, high-pressure gas can enter a cavity between the releasing core tube and the releasing upper joint along the first air inlet hole to push the seat sealing piston to move downwards, further push the push short section to move, the push short section cuts the first seat sealing shear pin, further push the rubber sleeve upper pressure sleeve and the rubber sleeve lower pressure sleeve to move downwards, and drive the first sealing rubber sleeve to expand to realize seat sealing of the upper packer; meanwhile, the upper pressing sleeve of the rubber cylinder locks a fixed position through a first locking spring, in addition, the downward movement of the lower pressing sleeve of the rubber cylinder drives an upper cone to extrude the slips, the slips expand outwards to push the plate spring to move outwards, and the position of the device is fixed through the outer teeth on the outer side to fix the wall of the sleeve;
secondly, a steam injection process: after seat sealing, continuously improving the pressure of injected gas, cutting off a shear pin, enabling a seat sealing steel ball and a ball seat to fall into a seat sealer, and injecting steam of high-temperature composite carbon dioxide into a steam injection valve through a releasing core pipe, a layer partition pipe and a connecting core pipe due to the fact that through holes are distributed in the seat sealer, then injecting the steam of the high-temperature composite carbon dioxide into a heavy oil reservoir through a plurality of one-way steam injection valves, and stewing after steam injection is completed;
after the well stewing is finished, releasing pressure, discharging redundant high-temperature composite carbon dioxide steam from a one-way oil extractor, pushing a one-way valve open by the high-temperature composite carbon dioxide steam, entering the sand filtering core pipe from a fourth air inlet, then passing through holes distributed on the seat sealer, and discharging along the steam injection valve, the connecting core pipe, the interlayer spacing pipe and the releasing core pipe to realize pressure release; after pressure relief is finished, the pipe column is rotated forward, the upper joint of the releasing gadget, the releasing gadget core pipe, the seat seal piston, the interlayer inner spacing pipe, the compensation outer sleeve, the double-male connector and the compensation core pipe are lifted out, and then the oil production pipe column is put in for oil production operation.
Compared with the prior art, the invention has the following beneficial effects:
1. because the device of the invention is put into the well at one time, and realizes the synchronous seat sealing of two oil layers, and the sealing ring is arranged between the lower end of the releasing core tube and the lower joint, the upper and lower packers can be effectively isolated, so that the seat sealing of the two oil layers is reliable, the loss of injected substances and energy during steam injection is avoided, the steam injection efficiency is improved, simultaneously, the corrosion of the injected high-temperature composite carbon dioxide steam to the metal casing of the oil well is reduced, and the service life of the oil well is prolonged;
2. because the process is one-time construction operation, the problem of sealing failure caused by secondary butt joint is avoided, the water content in production is reduced, and the production benefit is improved; in addition, the construction procedures are reduced by once putting the tubular column, the labor intensity of workers is reduced, the construction period is shortened, and better benefits are created for the development of oil fields;
3. in addition, the steam injection valve is organically combined with the seat seal device and the one-way oil extraction device, so that the design is simplified, the adopted oil extraction sealing cylinder is matched with the one-way valve in an inclined plane, the structure is simple, the effect is obvious, the one-way valve is closed during steam injection, and the steam of the high-temperature composite carbon dioxide is discharged into an oil layer of the thick oil through the one-way steam injection valve; when the pressure is released, the one-way steam injection valve is closed, and the one-way valve is opened, so that the release of the redundant pressure after the soaking is convenient, the steam injection and the pressure release are effectively realized, and the absorption effect of the stratum on the steam of the high-temperature composite carbon dioxide is improved;
4. in addition, the one-way oil extractor realizes one-way liquid discharge, improves the production effect of the stratum, simultaneously reduces the impact of sand on the filter layer in production, and prolongs the production period of thickened oil exploitation.
Drawings
FIG. 1 is a schematic overall profile of the present invention;
FIG. 2 is a schematic representation of the upper sub and upper packer section of the upper portion of the present invention;
FIG. 3 is a schematic diagram of the construction of the intermediate zone spacer, the connecting core tube and the lower packer section of the present invention;
FIG. 4 is a schematic structural view of a lower steam injection valve, a seat seal, a one-way oil extraction device and a blind plug portion of the present invention;
in the upper diagram: the packer comprises an upper packer 100, an interlayer spacing pipe 200, a connecting core pipe 300, a lower packer 400, a steam injection valve 500, a setting packer 600, a one-way oil extractor 700, a releasing upper joint 1, a releasing core pipe 2, a setting piston 3, a pushing short section 4, a fishing head 5, a first setting shear pin 6, a first lock spring 7, a rubber sleeve upper pressing sleeve 8, a first central pipe 9, a rubber sleeve liner pipe 10, a first sealing rubber sleeve 11, a rubber sleeve lower pressing sleeve 12, an upper cone 13, a slip 14, a plate spring 15, a lower cone 16, a slip sleeve 17, a lower cone retainer ring 18, a lower joint 19, a retainer ring 20, an interlayer outer spacing pipe 21, an interlayer inner spacing pipe 21.1, a compensation outer sleeve 22, an outer pipe 22.1, a double male pipe 23, a compensation core pipe 24, a central pipe joint upper joint 25, a second central pipe 26, a sealing piston 27, a second lock spring 28, a second lock spring sleeve 29, a second setting seal shear pin 30, a second sealing rubber sleeve 31, a deblocking retainer ring 32, a deblocking shear pin 33, The device comprises a limiting stop ring 34, a seat sealing steam injection plug 35, a ball seat 36, a shear pin 37, a locking constant force pin 38, a one-way steam injection valve 39, a spring 40, a constant pressure screw 41, a steam injection body 42, an oil extraction sealing cylinder 43, a one-way valve 44, a sand filtering layer 45, a sand filtering core pipe 46, a blind plug 47, a first air inlet hole 801, a second air inlet hole 802, a third air inlet hole 803 and a fourth air inlet hole 804.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Embodiment 1, referring to fig. 1 to 4, the present invention provides a dual packer steam injection integrated device for heavy oil recovery in an oil field, including an upper packer 100, a lower packer 400, and a steam injection valve 500, wherein the lower end of the upper packer 100 is provided with the lower packer 400, and the lower end of the lower packer 400 is provided with the steam injection valve 500, wherein: the packer comprises an upper packer 100, a lower packer 400, a steam injection valve 500, a connecting core pipe 300, a packer 600, a one-way oil extractor 700, a lower packer 200, a connecting core pipe 300, a lower packer 400, a lower packer 600, a one-way oil extractor 700, a lower packer 100, a lower packer, a;
the inner cavity of the upper packer 100 is provided with a releasing core tube 2, the upper end of the releasing core tube 2 is connected with a releasing upper joint 1, the lower end of the releasing core tube 2 is connected with an interlayer inner spacer tube 21.1 of an interlayer spacer tube 200, the lower end of the interlayer inner spacer tube 21.1 is connected with a compensation core tube 24 through a connecting core tube 300, the lower end of the compensation core tube 24 penetrates through a lower packer 400 to be connected with a seat seal steam plug 35, a ball seat 36 is connected with the seat seal steam plug 35 through a shear pin 37, a seat seal 600 is arranged on the lower side of the ball seat 36, the seat seal 600 is fixedly connected with the inner cavity of the shell of the steam injection valve 500 through a locking constant force pin 38, the locking constant force pin 38 adopts a pin capable of being sheared, and the shearing force of the locking constant force pin is larger than that of the first seat seal shear pin 6.
The seat seal 600 is of a concave groove structure and is provided with a plurality of through holes, a plurality of one-way steam injection valves 39 are arranged on a steam injection body 42 on the lower side of the steam injection valve 500, a one-way oil extractor 700 is connected to the lower end of the steam injection valve 500, an oil extraction sealing cylinder 43, a one-way valve 44, a sand filtering layer 45 and a sand filtering core pipe 46 are arranged in the one-way oil extractor 700, a convex oil extraction sealing cylinder 43 is arranged outside the sand filtering core pipe 46, a blind plug 47 is connected to the lower end of the sand filtering core pipe 46, a plurality of one-way valves 44 are arranged in the oil extraction sealing cylinder 43, and a sand filtering layer 45 is arranged on the lower side of the one-way valve 44.
The upper packer 100 comprises a setting piston 3, a pushing nipple 4, a fishing head 5, a first setting shear pin 6, a first lock spring 7, a rubber sleeve upper pressing sleeve 8, a first central pipe 9, a rubber sleeve liner pipe 10, a first sealing rubber sleeve 11, a rubber sleeve lower pressing sleeve 12, an upper cone 13, a slip 14, a plate spring 15, a lower cone 16, a slip sleeve 17, a lower cone retainer ring 18, a lower joint 19 and a retainer ring 20, wherein the setting piston 3 is arranged at the upper end of the pushing nipple 4 and is installed in a cavity formed between the outer wall of a releasing core pipe 2 and a releasing upper joint 1; the outer side of the lower end of the pushing and pressing short section 4 is connected with an upper rubber sleeve pressing sleeve 8, the inner end of the pushing and pressing short section is connected with a fishing head 5 through a first seat seal shear pin 6, the lower end of the fishing head 5 is connected with a first central pipe 9, the upper rubber sleeve pressing sleeve 8, a rubber sleeve liner pipe 10, a first seal rubber sleeve 11, a rubber sleeve lower pressing sleeve 12, an upper cone 13, a slip 14, a plate spring 15, a lower cone 16 and a lower cone retainer ring 18 are positioned on the outer wall of the first central pipe 9, the lower end of the upper rubber sleeve pressing sleeve 8 is connected with the rubber sleeve liner pipe 10 in a matched mode, a first seal rubber sleeve 11 and a rubber sleeve lower pressing sleeve 12 are arranged on the outer side of the rubber sleeve liner pipe 10, and the upper rubber sleeve 8 presses the first seal rubber sleeve 11 downwards to enable the first seal rubber sleeve 11 to expand to achieve a packing function; the lower end of the rubber cylinder lower pressing sleeve 12 contacts the upper cone 13, a slip 14 is arranged between the upper cone 13 and the lower cone 16, a plate spring 15 is arranged on the outer side of the slip 14, and the slip 14 pushes the plate spring 15 to be fixed with the wall of the sleeve after being expanded, so that a locking function is achieved.
The upper end and the lower end of the slip 14 are in a conical structure and are used for being matched with an upper cone body 13 and a lower cone body 16, a slip sleeve 17 is arranged on the outer side of the upper cone body 13 and the outer side of the lower cone body 16 and is used for limiting the slip 14 to move between the upper cone body 13 and the lower cone body 16, a groove is arranged on the outer side of the slip 14, a plate spring 15 is arranged in the groove, and external teeth are fixed on the outer side of the plate spring 15 and are used for being locked with a sleeve wall.
The upper side of the releasing core tube 2 is provided with a first air inlet hole 801 which is positioned on the upper side of a seat seal piston 3, and two sides of the seat seal piston 3 are provided with sealing rings; the upper pressing sleeve 8 of the rubber cylinder is in sliding fit with the outer wall of the first central pipe 9 through the first locking spring 7; the lower end of the first central tube 9 is connected with a lower joint 19 through a lower cone 16, the outer wall of the lower joint 19 is provided with a baffle ring 20, the outer side of the lower end of the lower joint 19 is movably connected with an interlayer outer partition tube 21, and the inner end of the lower joint 19 is hermetically connected with the outer wall of the lower end of the releasing core tube 2.
The connection core pipe 300 comprises a compensation outer sleeve 22, a double male connector 23 and an outer pipe 22.1, wherein the upper end of the compensation core pipe 24 is connected with the compensation outer sleeve 22 through the double male connector 23, the upper end of the outer pipe 22.1 is connected with an interlayer outer spacing pipe 21, and the lower end of the outer pipe 22.1 is connected with a central pipe upper connector 25 of a lower packer 400.
The lower packer 400 comprises a central pipe upper joint 25, a second central pipe 26, a sealing piston 27, a second lock spring 28, a second lock spring sleeve 29, a second seat sealing shear pin 30, a second sealing rubber cylinder 31, a deblocking ring 32, a deblocking shear pin 33 and a limiting ring 34, wherein the upper end of the second central pipe 26 is connected with the central pipe upper joint 25, and the lower end of the second central pipe 26 is connected with a steam injection valve 500; the sealing piston 27 is installed in a cavity between the second central tube 26 and the central tube upper joint 25, and a second sealing rubber cylinder 31 is arranged between the lower end of the sealing piston 27 and the unblocking baffle ring 32; an unsealing shear pin 33 is arranged between the unsealing retaining ring 32 and the second central pipe 26, and a limiting retaining ring 34 is arranged on the lower side of the unsealing retaining ring 32; the lower end of the central pipe upper joint 25 is movably connected with a second lock spring sleeve 29, the second lock spring sleeve 29 is connected with the outer wall of the sealing piston 27 through a second seat seal shear pin 30, the second lock spring 28 is connected with the outer wall of the sealing piston 27, and the sealing piston 27 drives the second lock spring 28 to move downwards and is in sliding fit with the second lock spring sleeve 29.
The upper side of the second central tube 26 of the invention is provided with a third air inlet 803 positioned at the upper side of the sealing piston 27, and the upper end part of the sealing piston 27 is provided with a sealing ring; the lower side of the compensating core tube 24 is provided with a second air inlet hole 802, and high-pressure gas enters a cavity between the compensating core tube 24 and the second central tube 26 along the second air inlet hole 802 and pushes the sealing piston 27 to move downwards through a third air inlet hole 803 of the second central tube 26.
The outer side of the one-way valve 44 is of an inclined surface structure and is in sliding fit with an inclined surface opening at the lower end of the oil extraction sealing cylinder 43; the sand filtering core pipe 46 is provided with a fourth air inlet hole 804, and is communicated with the oil extraction sealing cylinder 43 through the fourth air inlet hole 804.
The invention provides a using method of a double packer steam injection integrated device for oil field thick oil exploitation, which comprises the following steps:
firstly, a setting process: a seat sealing steel ball is thrown in from a wellhead, after the seat sealing steel ball falls on a ball seat 36, high-pressure gas starts to be thrown in, the high-pressure gas enters an interlayer inner partition pipe 21.1 along an inner cavity of the releasing core pipe 2 and then enters the compensating core pipe 24, the seat sealing steel ball seals the ball seat 36, so that the high-pressure gas enters a cavity between the compensating core pipe 24 and the second central pipe 26 along a second gas inlet 802, a sealing piston 27 is pushed to move downwards through a third gas inlet 803 of the second central pipe 26 to shear a second seat sealing shear pin 30, the sealing piston 27 drives a second locking spring 28 to move along a second locking spring sleeve 29 and lock, and the sealing piston 27 pushes the second sealing rubber cylinder 31 to expand to realize seat sealing of the lower packer 400; in addition, high-pressure gas can enter a cavity between the releasing core tube 2 and the releasing upper joint 1 along the first gas inlet hole 801 to push the seat seal piston 3 to move downwards, further push the push nipple 4 to move, the push nipple 4 cuts the first seat seal shear pin 6, further push the rubber sleeve upper pressure sleeve 8 and the rubber sleeve lower pressure sleeve 12 to move downwards, and drive the first seal rubber sleeve 11 to expand to realize seat seal of the upper packer 100; meanwhile, the upper pressure sleeve 8 of the rubber cylinder is locked at a fixed position through the first locking spring 7, in addition, the downward movement of the lower pressure sleeve 12 of the rubber cylinder drives the upper centrum 13 to extrude the slips 14, the slips 14 expand outwards to push the plate spring 15 to move outwards, and the position of the device is fixed through the outer teeth on the outer side to fix the sleeve wall;
secondly, a steam injection process: after the seat is sealed, the pressure of the injected gas is continuously increased, the shear pins 37 are cut off, the seat seal steel balls and the ball seats 36 fall into the seat seal device 600 together, through holes are distributed on the seat seal device 600, therefore, the steam of the high-temperature composite carbon dioxide is injected into the steam injection valve 500 through the releasing core pipe 2, the interlayer spacing pipe 200 and the connecting core pipe 300, at the moment, the steam of the high-temperature composite carbon dioxide in the pipe column is injected into the heavy oil reservoir through the plurality of one-way steam injection valves 39, and after the steam injection is finished, the well stewing is carried out;
after the well stewing is finished, releasing pressure, discharging redundant high-temperature composite carbon dioxide steam from the one-way oil extractor 700, pushing the one-way valve 44 open by the high-temperature composite carbon dioxide steam, entering the sand filtering core pipe 46 from the fourth air inlet hole 804, and then discharging the steam along the steam injection valve 500, the connecting core pipe 300, the interlayer spacing pipe 200 and the releasing core pipe 2 through holes distributed on the seat sealer 600 to realize pressure release; after pressure releasing is finished, the pipe column is rotated forward, the releasing upper joint 1, the releasing core pipe 2, the seat seal piston 3, the interlayer inner spacing pipe 21.1, the compensation outer sleeve 22, the double male joint 23, the compensation core pipe 24, the seat seal steam injection plug 35, the ball seat 36 and the seat seal device 600 are lifted out, and then the oil production pipe column is put in for oil production operation.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, the technical solution according to the present invention is subject to corresponding simple modifications or equivalent changes, as far as the scope of the present invention is claimed.
Claims (9)
1. The utility model provides an oil field viscous crude is exploited and is annotated integrative device of vapour with two packers, includes packer (100), lower packer (400) and notes steam valve (500), goes up packer (100) lower extreme and installs lower packer (400), and notes steam valve (500), characterized by are installed to the lower extreme of lower packer (400): the packer is characterized by further comprising an interlayer spacing pipe (200), a connecting core pipe (300), a seat packer (600) and a one-way oil extractor (700), wherein the lower end of the upper packer (100) is connected with the lower packer (400) through the interlayer spacing pipe (200) and the connecting core pipe (300), and the seat packer (600) and the one-way oil extractor (700) are installed at the lower end of the steam injection valve (500);
a releasing core tube (2) is installed in the inner cavity of the upper packer (100), the upper end of the releasing core tube (2) is connected with a releasing upper joint (1), the lower end of the releasing core tube (2) is connected with an interlayer inner spacer tube (21.1) of an interlayer spacer tube (200), the lower end of the interlayer inner spacer tube (21.1) is connected with a compensation core tube (24) through a connection core tube (300), the lower end of the compensation core tube (24) penetrates through the lower packer (400) to be connected with a seat seal steam plug (35), a ball seat (36) is connected with the seat seal steam plug (35) through a shear pin (37), a seat seal (600) is arranged on the lower side of the ball seat (36), and the seat seal (600) is fixedly connected to the inner cavity of the shell of the steam injection valve (500) through a locking constant force pin (38);
the seat seals ware (600) is the concave groove structure, and is equipped with a plurality of through-holes, is equipped with a plurality of one-way steam injection valves (39) on steam injection body (42) of the downside of steam injection valve (500), connects one-way oil recovery ware (700) at the lower extreme of steam injection valve (500), be equipped with oil recovery sealed cylinder (43), check valve (44), sand filtering layer (45) and sand filtering core pipe (46) in one-way oil recovery ware (700), the outside of sand filtering core pipe (46) is equipped with convex oil recovery sealed cylinder (43), and blind plug (47) are connected to the lower extreme of sand filtering core pipe (46), be equipped with a plurality of check valves (44) in oil recovery sealed cylinder (43), the downside of check valve (44) is equipped with sand filtering layer (45).
2. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 1, wherein: the upper packer (100) comprises a setting piston (3), a pushing nipple (4), a fishing head (5), a first setting shear pin (6), a first locking spring (7), a rubber sleeve upper pressing sleeve (8), a first central pipe (9), a rubber sleeve liner pipe (10), a first sealing rubber sleeve (11), a rubber sleeve lower pressing sleeve (12), an upper cone (13), a slip (14), a plate spring (15), a lower cone (16), a slip sleeve (17), a lower cone retaining ring (18), a lower joint (19) and a retaining ring (20), wherein the setting piston (3) is arranged at the upper end of the pushing nipple (4) and is installed in a cavity formed between the outer wall of the releasing core pipe (2) and the releasing upper joint (1); the outer side of the lower end of the pushing and pressing short section (4) is connected with an upper rubber sleeve pressing sleeve (8), the inner end of the pushing and pressing short section is connected with the fishing head (5) through a first seat seal shear pin (6), the lower end of the fishing head (5) is connected with a first central pipe (9), the upper rubber sleeve pressing sleeve (8), a rubber sleeve liner pipe (10), a first sealing rubber sleeve (11), a rubber sleeve lower pressing sleeve (12), an upper cone body (13), a slip (14), a plate spring (15), a lower cone body (16) and a lower cone body retaining ring (18) are positioned on the outer wall of the first central pipe (9), the lower end of the upper rubber sleeve pressing sleeve (8) is connected with the rubber sleeve liner pipe (10) in a matched mode, the outer side of the rubber sleeve liner pipe (10) is provided with the first sealing rubber sleeve (11) and the rubber sleeve lower pressing sleeve (12), the lower end of the lower rubber sleeve lower pressing sleeve (12) contacts with the upper cone body (13), and the slip (14) is arranged between the upper cone body (13) and the lower cone body (16), and a plate spring (15) is arranged outside the slip (14).
3. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 2, wherein: the upper end and the lower end of the slip (14) are of conical structures and are matched with an upper cone body (13) and a lower cone body (16), slip sleeves (17) are arranged on the outer sides of the upper cone body (13) and the lower cone body (16) and are used for limiting the slip (14) to move between the upper cone body (13) and the lower cone body (16), a groove is formed in the outer side of the slip (14), a plate spring (15) is arranged in the groove, and external teeth are fixed on the outer side of the plate spring (15) and are used for being locked with a sleeve wall.
4. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 3, wherein: the upper side of the releasing core pipe (2) is provided with a first air inlet hole (801) which is positioned on the upper side of the seat sealing piston (3), and two sides of the seat sealing piston (3) are provided with sealing rings; the upper pressing sleeve (8) of the rubber cylinder is in sliding fit with the outer wall of the first central pipe (9) through a first locking spring (7); the lower end of the first central pipe (9) is connected with a lower joint (19) through a lower cone body (16), the outer wall of the lower joint (19) is provided with a retaining ring (20), the outer side of the lower end of the lower joint (19) is movably connected with an interlayer outer partition pipe (21), and the inner end of the lower joint (19) is hermetically connected with the outer wall of the lower end of the releasing core pipe (2).
5. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 4, wherein: connect core pipe (300) including compensation overcoat (22), two public connector (23) and outer tube (22.1), compensation overcoat (22) is connected through two public connector (23) to the upper end of compensation core pipe (24), outer spacer tube (21) between the upper end connecting layer of outer tube (22.1), center tube top connection (25) of packer (400) are down connected to the lower extreme of outer tube (22.1).
6. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 5, wherein: the lower packer (400) comprises a central pipe upper joint (25), a second central pipe (26), a sealing piston (27), a second lock spring (28), a second lock spring sleeve (29), a second seat sealing shear pin (30), a second sealing rubber cylinder (31), a deblocking stop ring (32), a deblocking shear pin (33) and a limiting stop ring (34), wherein the upper end of the second central pipe (26) is connected with the central pipe upper joint (25), and the lower end of the second central pipe (26) is connected with a steam injection valve (500); the sealing piston (27) is arranged in a cavity between the second central pipe (26) and the central pipe upper joint (25), and a second sealing rubber cylinder (31) is arranged between the lower end of the sealing piston (27) and the deblocking ring (32); an unsealing shear pin (33) is arranged between the unsealing baffle ring (32) and the second central pipe (26), and a limiting baffle ring (34) is arranged on the lower side of the unsealing baffle ring (32); the lower end of the central pipe upper joint (25) is movably connected with a second lock spring sleeve (29), the second lock spring sleeve (29) is connected with the outer wall of the sealing piston (27) through a second seat seal shear pin (30), and the second lock spring (28) is connected with the outer wall of the sealing piston (27).
7. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 6, wherein: a third air inlet hole (803) is formed in the upper side of the second central pipe (26), the third air inlet hole is located in the upper side of the sealing piston (27), and a sealing ring is arranged at the upper end part of the sealing piston (27); and a second air inlet hole (802) is formed in the lower side of the compensation core pipe (24).
8. The integrated dual packer steam injection device for the heavy oil recovery of the oil field as claimed in claim 7, wherein: the outer side of the one-way valve (44) is of an inclined surface structure and is in sliding fit with an inclined surface opening at the lower end of the oil extraction sealing cylinder (43); the sand filtering core pipe (46) is provided with a fourth air inlet hole (804) which is communicated with the oil extraction sealing cylinder (43) through the fourth air inlet hole (804).
9. The use method of the double packer steam injection integrated device for the heavy oil recovery of the oil field as claimed in claim 8 is characterized in that: the method comprises the following steps:
firstly, a setting process: a seat sealing steel ball is thrown in from a wellhead, after the seat sealing steel ball falls on a ball seat (36), high-pressure gas starts to be thrown in, the high-pressure gas enters an interlayer inner partition pipe (21.1) along an inner cavity of a releasing core pipe (2) and then enters a compensating core pipe (24), and the seat sealing steel ball seals the ball seat (36), so that the high-pressure gas can enter a cavity between the compensating core pipe (24) and a second central pipe (26) along a second air inlet hole (802), a sealing piston (27) is pushed to move downwards through a third air inlet hole (803) of the second central pipe (26), a second seat sealing shear pin (30) is cut off, the sealing piston (27) drives a second lock spring (28) to move and lock along a second lock spring sleeve (29), and the sealing piston (27) pushes a second sealing rubber cylinder (31) to expand to realize seat sealing of a lower packer (400); in addition, high-pressure gas can enter a cavity between the releasing core tube (2) and the releasing upper joint (1) along the first air inlet hole (801), the seat sealing piston (3) is pushed to move downwards, the pushing nipple (4) is further pushed to move, the pushing nipple (4) is pushed to cut the first seat sealing shear pin (6), the rubber sleeve upper pressing sleeve (8) and the rubber sleeve lower pressing sleeve (12) are further pushed to move downwards, and the first sealing rubber sleeve (11) is driven to expand to realize seat sealing of the upper packer (100); meanwhile, the upper pressing sleeve (8) of the rubber cylinder locks a fixed position through a first locking spring (7), in addition, the downward movement of the lower pressing sleeve (12) of the rubber cylinder drives an upper cone (13) to extrude a slip (14), the slip (14) expands outwards to push a plate spring (15) to move outwards, and the position of the device is fixed through the outer teeth on the outer side to fix the sleeve wall;
secondly, a steam injection process: after seat sealing, the pressure of injected gas is continuously improved, a shear pin (37) is cut off, a seat sealing steel ball and a ball seat (36) fall into a seat sealing device (600), through holes are distributed on the seat sealing device (600), so that steam of high-temperature composite carbon dioxide is injected into a steam injection valve (500) through a releasing core pipe (2), an interlayer spacing pipe (200) and a connecting core pipe (300), at the moment, the steam of the high-temperature composite carbon dioxide in a pipe column is injected into the heavy oil reservoir through a plurality of one-way steam injection valves (39), and after steam injection is completed, well stewing is carried out;
thirdly, after the well stewing is finished, releasing pressure, discharging redundant high-temperature composite carbon dioxide steam from a one-way oil extractor (700), pushing a one-way valve (44) open by the high-temperature composite carbon dioxide steam, entering a sand filtering core pipe (46) from a fourth air inlet (804), then discharging the steam along a steam injection valve (500), a connecting core pipe (300), an interlayer spacing pipe (200) and a releasing core pipe (2) through holes distributed on a seat sealer (600) to realize pressure release; after pressure release is finished, the pipe column is rotated forward, the releasing upper joint (1), the releasing core pipe (2), the setting piston (3), the interlayer inner spacing pipe (21.1), the compensation outer sleeve (22), the double-male connector (23) and the compensation core pipe (24) are lifted up and taken out, and then the oil production pipe column is put in for oil production operation.
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