CN102518408A - Telescopic pressure relief type steam injection packer - Google Patents
Telescopic pressure relief type steam injection packer Download PDFInfo
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- CN102518408A CN102518408A CN2011104046710A CN201110404671A CN102518408A CN 102518408 A CN102518408 A CN 102518408A CN 2011104046710 A CN2011104046710 A CN 2011104046710A CN 201110404671 A CN201110404671 A CN 201110404671A CN 102518408 A CN102518408 A CN 102518408A
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- 238000010793 Steam injection (oil industry) Methods 0.000 title abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 21
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Abstract
The invention provides a telescopic pressure relief type steam injection packer, which comprises: the steam injection device comprises a central pipe, an outer pipe, an expansion cylinder and a protection bushing, wherein the central pipe and the outer pipe are arranged in a sealing mode, the expansion cylinder which expands when heated is sleeved outside the outer pipe, the protection bushing is arranged between the central pipe and the outer pipe, the central pipe and the outer pipe are connected through the protection bushing, and the protection bushing is made of high-temperature-resistant materials which are solid in a normal state and melt at the steam injection temperature. The invention can be used in the thick oil steam injection well, can meet the requirements of the thick oil well on the general steam injection separation and layer selection steam injection process, and can simultaneously realize two process technologies of oil well oil sleeve annular sealing and tubular column thermal compensation. The construction process is reduced, the production cost of the oil well is reduced, and the economic benefit is improved.
Description
Technical field
The present invention relates to a kind of packer that is used for the viscous crude field heat extraction by steam injection, annotate the vapour packer in particular to a kind of flexible pressure release type.
Background technology
Along with the industrial applications of steam injection oil recovery technique, the demand of the down-hole being annotated the vapour packer is also increasing.During steam injection, the method for packing oil sets annular space has oil sets annular space to annotate nitrogen and two kinds of methods of following thermal packer.Wherein descend the construction sequence of thermal packer easy, construction cost is less, and effect of heat insulation is also better, in injecting-steam viscous crude oil well, uses comparatively general.
Present many down-holes steam injection string is when adopting thermal packer; Also to compensate expanding with heat and contract with cold of tubing string; So general down-hole steam injection string mainly is made up of expansion loop and two kinds of instruments of thermal packer, the two split is provided with, the long oil pipe of midfeather rice up to a hundred; Construction sequence is complicated, and cost is also higher.And the thermal packer that has is the design solutions sealing mechanism not, and after notes vapour finished, the packer normally situation of deblocking happened occasionally, and this just has to increase the operation of workover treatment, has delayed the ordinary production of oil well simultaneously, has increased the cost of production of oil well.
Summary of the invention
The present invention aims to provide a kind of flexible pressure release type and annotates the vapour packer, and the construction sequence that brings with expansion loop and thermal packer split setting in the solution prior art is complicated, and cost is than problems such as height.
For this reason; The present invention proposes a kind of flexible pressure release type and annotates the vapour packer; Said flexible pressure release type is annotated the vapour packer and comprised: sealing is provided with between central tube 1, outer tube 4, said central tube 1 and the said outer tube 4; The said outer tube 4 outer expansion cylinders of meeting thermal expansion that are arranged with; Be provided with protection lining 14 between said central tube 1 and the said outer tube 4, said central tube 1 is connected through protection lining 14 with said outer tube 4, and said protection lining 14 is by processing for exotic material solid-state, that under steam injecting temperature, melt under the normality.
Further, said lining 14 is processed by high-temperature nylon, and the lower end of said central tube 1 is connected with short circuit 15, and the lower end of said outer tube 4 is arranged with box cupling 13, and said protection lining 14 is set between said box cupling 13 and the said short circuit 15.
Further; Said box cupling is connected with said outer tube through screw thread, and said short circuit is socketed in outside the said central tube through screw thread, buckles and buckles outward in said protection lining is provided with; The interior button with said short circuit of said protection lining is connected, and outer the button with said box cupling of said protection lining is connected.
Further, said expansion cylinder comprises: be set in annular expansion body 7 and the main cavity 8 between said expansion body 7 and said outer tube 4 on the said outer tube 4 through welding, in the said main cavity 8 the chemically expansible agent be housed, said expansion body 7 is a steel material.
Further, said flexible pressure release type is annotated the vapour packer and is also comprised: the compensated cavity 10 that communicates with said main cavity 8 passing hole channels, be equipped with said chemically expansible agent in the said compensated cavity 10.
Further; Said compensated cavity 10 is arranged on the below of said main cavity 8; Be socketed with fixed cover 20 outside the said outer tube 4; Said compensated cavity 10 is formed by the space between said fixed cover 20 and the said outer tube 4, and the wall thickness of said fixed cover 20 sidewalls is greater than the wall thickness of said expansion body 7 sidewalls, and said fixed cover 20 is the steel material of hardness greater than the hardness of said expansion body 7.
Further; Said flexible pressure release type is annotated the vapour packer and is also comprised: be installed in the pressure release pin 11 on the said outer tube; The material of said expansion body 7 is carbon steel or alloy steel, and the material of said fixed cover 20 is carbon steel or the alloy steel of hardness greater than said expansion body 7.
Further, said pressure release pin 11 is connected with said compensated cavity 10.
Further; Be provided with airtight and watertight padding 5 between said central tube 1 and the said outer tube 4; Said airtight and watertight padding 5 is positioned at the upper end of said outer tube 4; The upper end of said expansion body 7 is provided with the last helmet 6 of annular, and the lower end of said expansion body 7 is provided with the following helmet 9 of annular, and the said helmet 6 of going up is separately positioned on the said outer tube 4 with said helmet 9 down; Saidly go up helmet 6, it is said that helmet 9 is concordant with the outer rim of said fixed cover 20 down, the external diameter of said expansion body 7 is less than the said external diameter of going up helmet 6, said helmet 9 down and said fixed cover 20.
Further; The sidewall of said outer tube 4 is provided with boss 40; Said main cavity 8 lays respectively at said boss with said compensated cavity 10, and about in the of 40 both sides; Be provided with the connecting hole 42 that connects said main cavity 8 and said compensated cavity 10 in the said boss 40, the volume of said compensated cavity 10 account for said main cavity 8 volume 15% to 30%.
The present invention adopts the protection lining of processing for exotic material solid-state, that under steam injecting temperature, melt under the normality as connecting the connector of said central tube 1 with said outer tube 4; The protection lining guarantees that packer goes into the well in the process; The relative fixed of central tube and outer tube prevents packer in the process of going into the well, and central tube 1 produces axially-movable with respect to outer tube 4; Stop central tube upwards to slide, cause the pressure release pin to be cut off and cause packer to lose efficacy with respect to outer tube.When annotating vapour, the protection lining melts, and can realize that central tube moves vertically, compensates expanding with heat and contract with cold of steam injection string.Simultaneously; The present invention has the expansion cylinder of meeting thermal expansion, can realize the function of thermal packer, thereby; The function of thermal-arrest expansion loop of the present invention and two kinds of instruments of thermal packer is an one; Can realize the sealing of oil well oil jacket annular space and two technologies of tubing string thermal compensation simultaneously, improve notes vapour effect, practice thrift the cost of production of oil well.
And then, be installed in the deblocking problem that pressure release pin on the said outer tube has solved the thermal expansion packer, reduced the operation of workover treatment, guaranteed the ordinary production of oil well.
Further; The present invention utilizes compensated cavity to increase the expansion pressure of main cavity in the expansion body; When the expansion pressure of main cavity does not reach sealing load or expansion pressure reduction; Chemically expansible agent meeting in the compensated cavity adds in the main cavity, for main cavity provides additional, can keep sealing effectiveness for a long time.
Description of drawings
Fig. 1 annotates vapour packer overall structure sketch map according to the flexible pressure release type of the embodiment of the invention;
The structure of the amplification of A part among Fig. 2 Fig. 1;
The structure of the amplification of B part among Fig. 3 Fig. 1;
Wherein, it is longer that flexible pressure release type is annotated vapour packer overall structure, watches clearly for view, and the pressure release type that will stretch is annotated vapour packer overall structure and is divided into A, B two parts.
The drawing reference numeral explanation:
1, central tube 2, pressure cap 3, pressure ring 4, outer tube 5, airtight and watertight padding 6, last helmet
7, expansion body 8, main cavity 9, following helmet 10, compensated cavity 11, pressure release pin 12, plug
13, box cupling 14, protection lining 15, short circuit 16, lower contact 20, fixed cover 40, boss
42, connecting hole
The specific embodiment
To understand in order technical characterictic of the present invention, purpose and effect being had more clearly, to contrast the description of drawings specific embodiment of the present invention at present.
Extremely shown in Figure 3 like Fig. 1; The present invention proposes a kind of flexible pressure release type and annotates the vapour packer; Said flexible pressure release type is annotated the vapour packer and comprised: sealing is provided with between central tube 1, outer tube 4, said central tube 1 and the said outer tube 4; The said outer tube 4 outer expansion cylinders of meeting thermal expansion that are arranged with; Be provided with protection lining 14 between said central tube 1 and the said outer tube 4, said central tube 1 is connected through protection lining 14 with said outer tube 4, and said protection lining 14 is by processing for exotic material solid-state, that under steam injecting temperature, melt under the normality.Steam injecting temperature is generally 260 ℃ to 300 ℃, and the material that exotic material can select for use 260 to 300 degree to melt for example is high-temperature nylon, polyphenylene sulfide, polymeric liquid crystal copolymer or polytetrafluoroethylplastic plastic etc.Said central tube 1 is connected through protection lining 14 with said outer tube 4, and what concrete connected mode can see below further describes.As shown in Figures 2 and 3; Be provided with airtight and watertight padding 5 between said central tube 1 and the said outer tube 4, said airtight and watertight padding 5 is positioned at the upper end of said outer tube 4, and compresses with pressure cap 2 and pressure ring 3; 4 of pressure cap 2 and outer tubes are used screwed connection, to realize the sealing between central tube 1 and the said outer tube 4.Airtight and watertight padding 5 can be selected the various encapsulants of existing thermal packer for use.This paper is said to be last with left end among Fig. 1 up and down, and for down, this above-below direction is with should the locality of flexible pressure release type notes vapour packer in pit shaft consistent with right-hand member.
The present invention adopts under the normality to solid-state, and the protection lining that the exotic material that under steam injecting temperature, melts is processed is as connecting the connector of said central tube 1 with said outer tube 4, protects lining to guarantee that packer goes into the well in the process; Promptly annotate before the vapour; The relative fixed of central tube and outer tube prevents packer in work progress, and central tube 1 produces axially-movable with respect to outer tube 4; Stop central tube upwards to slide, in order to avoid the pressure release pin is cut off and caused packer to lose efficacy with respect to outer tube.When annotating vapour, the protection lining melts, and can realize that central tube moves vertically, compensates expanding with heat and contract with cold of steam injection string.Simultaneously; The present invention has the expansion cylinder of meeting thermal expansion, can realize the function of thermal packer, thereby; The function of thermal-arrest expansion loop of the present invention and two kinds of instruments of thermal packer is an one, can realize the sealing of oil well oil jacket annular space and two technologies of tubing string thermal compensation simultaneously
Further, as shown in figures 1 and 3, the lower end of said central tube 1 is connected with short circuit 15, and short circuit 15 belows connect lower contact 16, and the lower end of said outer tube 4 is arranged with box cupling 13, and said protection lining 14 is set between said box cupling 13 and the said short circuit 15.Can realize flexible pressure release type notes vapour packer and the oil pipe of bottom or being connected of other parts like this; Simultaneously; Box cupling 13 and short circuit 15 all are positioned at the lower end of said central tube 1 and outer tube 4; Thereby make protection lining 14 be positioned at the lower end of said central tube 1 and outer tube 4, and can realize annotating vapour rear center pipe 1 and produce enough downward axially-movable distances with respect to outer tube 4, can realize compensation to the abundance of steam injection string.Usually the central tube 1 of this flexible pressure release type notes vapour packer can produce 3 to 4 meters motion with respect to outer tube 4, can compensate elongating or shortening of more than 1000 meter steam injection string.Certainly, if compensate more stroke, can adjust dimensionally associated components.
Further; Said box cupling 13 is connected with said outer tube 4 through screw thread; Said short circuit 15 is socketed in outside the said central tube 1 through screw thread; Said protection lining 14 buckle in being provided with and is buckled outward, and said protection lining 14 interior buckled and be connected with said short circuit 15, and outer the button with said box cupling 13 of said protection lining 14 is connected.Like this, protection lining 14 is not connected short circuit 15 and box cupling 13 through interior the button with outer deduction of points, thereby makes protection lining 14 connect central tube 1 and outer tube 4.Utilize protection lining 14 through interior buckle with outer buckle central tube 1 and outer tube 4 can be so that be connected and stablizes, stress equalization, interior button and detain outward and be convenient to process also is convenient to the thawing of being heated.With respect to alternate manner, aforesaid way connects stable under normal conditions, at high temperature, melts rapidly.
Further; As shown in Figure 2; Said expansion cylinder comprises: be set in annular expansion body 7 and the main cavity 8 between said expansion body 7 and said outer tube 4 on the said outer tube 4 through welding, in the said main cavity 8 the chemically expansible agent be housed, said expansion body 7 is a steel material.Expansion body 7 produces expanded radially under the effect of chemically expansible agent expanded by heating, be adjacent to internal surface of sleeve pipe after the distortion, and expansion puts in place, and the sealing oil sets annular space is accomplished the action of seat envelope, has realized the function of thermal packer.The chemical agent that the chemically expansible agent can adopt existing thermal packer to use, for example liquid ethanol or ether.
Further, as shown in Figure 3, said flexible pressure release type is annotated the vapour packer and is also comprised: the compensated cavity 10 that communicates with said main cavity 8 passing hole channels, be equipped with said chemically expansible agent in the said compensated cavity 10.The chemically expansible agent of being equipped with in chemically expansible agent of being equipped with in the compensated cavity 10 and the main cavity 8 is same chemically expansible agent; Its effect is in order to have increased the expansion pressure of main cavity in the expansion body; When the expansion pressure of main cavity does not reach the expansion pressure reduction of sealing load or main cavity; Chemically expansible agent meeting in the compensated cavity adds in the main cavity, for main cavity provides additional, can keep sealing effectiveness for a long time.
Further, said compensated cavity 10 is arranged on the below of said main cavity 8, and the chemically expansible agent in the compensated cavity 10 at high temperature produces expansion; Because fixed cover 20 steel body intensity are bigger, can not produce distortion, therefore; That part of liquid that the back volume change of expanding is big or vapour, liquid mixture enter into main cavity 8 through connecting hole 42 under action of pressure; Produce high pressure together with the chemically expansible agent in the main cavity 8, make expansion body 7 produce radial deformation, the sealing oil sets annular space.Compensated cavity 10 is arranged on the advantage of main cavity 8 belows: the overall construction design of 1. being convenient to packer; 2. under the condition of high temperature, the liquid in the compensated cavity 10 produces vaporization phenomenon, and under the gravity segregation effect, steam is migration upwards, helps replenishing the pressure of main cavity 8.
Be socketed with fixed cover 20 outside the said outer tube 4, said compensated cavity 10 is formed by the space between said fixed cover 20 and the said outer tube 4, and said fixed cover 20 is the steel material of hardness greater than the hardness of said expansion body 7; For example; The material of expansion body 7 is carbon steel or alloy steel, and the material of fixed cover 20 is carbon steel or alloy steel, its objective is in order to make expansion body 7 expanses; And fixed cover 20 keeps stable, thereby compensated cavity 10 is replenished for the expansion of main cavity 8 provides tension force.The wall thickness of expansion body 7 sidewalls will guarantee the expansion body 7 generation expanded radially of being heated, and the wall thickness of said fixed cover 20 sidewalls can guarantee further that greater than the wall thickness of said expansion body 7 sidewalls compensated cavity 10 or fixed cover 20 do not expand.Punch on the end wall of fixed cover 20 lower ends, be used for can chemically expansible agent in compensated cavity 10, and with plug 12 shutoff, the fixing and sealing with welding manner then.
Further, as shown in Figure 3, said flexible pressure release type is annotated the vapour packer and is also comprised: be installed in the pressure release pin 11 on the said outer tube 4.Pressure release pin 11 is installed on the outer tube, is positioned at the top of short circuit 15, directly or indirectly links to each other with main cavity 8, and fixes and be sealedly connected on the outer tube 4 with welding manner.After annotating vapour and finishing, on carry central tube 1, when the short circuit that is connected with central tube 1 15 arrives pressure releases and pins 11 places, cut off pressure release and pin 11; Thereby destroy the sealing of main cavity 8, make main cavity 8 pressure discharge, expansion body is regained; The packer deblocking can propose tubing string, thereby makes packer be able to deblocking.Further, as shown in Figure 3, said pressure release pin 11 is connected with said compensated cavity 10; Such connected mode is convenient to the overall construction design of packer, helps the layout of each parts; This mode and pressure release pin 11 is compared with main cavity 8 ways of connecting, and the pressure release effect is similar.Pressure release pin 11 is positioned on the outer tube 4 of compensated cavity 10 inboards.
Further, as shown in Figure 3, the sidewall of said outer tube 4 is provided with boss 40, and said main cavity 8 lays respectively at said boss with said compensated cavity 10, and about in the of 40 both sides.Said outer tube 4 is provided with two boss up and down respectively; The upper end of expansion body 7 is welded on the upper boss (not indicating among the figure) of said outer tube 4; And block the upper end of expansion body 7 with the last helmet 6 of annular; The lower end of expansion body 7 is welded on lower boss, on the promptly said boss 40, and blocks the lower end of expansion body 7 with the following helmet 9 of annular.The said helmet 6 of going up is welded on respectively on the boss of said outer tube 4 with said helmet 9 down, and the concordant and external diameter of the said outer rim that goes up helmet 6, said helmet 9, said fixed cover 20 is not down collided with protection expansion body 7 or main cavity 8 greater than the external diameter of said expansion body 7.Be provided with the connecting hole 42 that connects said main cavity 8 and said compensated cavity 10 in the boss 40, boss 40 provides interface channel for said compensated cavity 10 with said main cavity 8 again both for expansion body 7 or main cavity 8 provide protection.Said compensated cavity 10 is 15% to 30% with the volume ratio of said main cavity 8.Above-mentioned ratio draws according to repeatedly calculating and testing; If the volume of said compensated cavity 10 is lower than 15% of said main cavity 8; Then compensation effect is relatively poor; Can not fully compensate the expansion pressure of expansion body 7,, might cause said main cavity 8 to damage expansion body 7 because of pressure is excessive if the volume of said compensated cavity 10 surpasses 30% of said main cavity 8.
Operating principle of the present invention is once simply described below:
Flexible pressure release type notes vapour packer is gone into the well in the process; Promptly annotating before the vapour, is solid-state under the normality, and the protection lining that the exotic material that under steam injecting temperature, melts is processed guarantees the relative fixed of central tube and outer tube; Prevent that packer is in the process of going into the well; Central tube 1 produces axially-movable with respect to outer tube 4, stops central tube upwards to slide with respect to outer tube, in order to avoid the pressure release pin is cut off and caused packer to lose efficacy.
After flexible pressure release type notes vapour packer was gone into the well and arrived the precalculated position, under the steam injecting temperature condition, the chemically expansible agent began to expand; Make expansion body 7 produce expanded radially simultaneously, in the time of 260 ℃ to 300 ℃, expansion body 7 expands and puts in place; The sealing oil sets annular space is accomplished the action of seat envelope.Compensated cavity 10 is used to compensate the chemical agent amount of chemical expansion agent in the expansion body 7, and increases the expansion pressure of expansion body 7 cavitys, has improved sealing effectiveness.In addition, when annotating vapour, the screw thread of protection lining 14 melts under steam injecting temperature, has removed centering core barrel 1 and has fixed with being connected of outer tube 4, can realize that central tube moves downward with respect to outer tube 4 vertically, the elongation of compensation steam injection string.When temperature reduced, central tube 1 moved upward with respect to outer tube 4, the shortening of compensation steam injection string.
After annotating vapour and finishing, on carry steam injection string, central tube 1 moves upward, the short circuit 15 that is attached thereto is cut off pressure release pin 11, and the pressure in expansion body and the compensated cavity is discharged, expansion body 7 pressure releases are shunk, the smooth deblocking of realization packer can propose steam injection string.
The present invention can be used in the thick oil filling steamed well, can satisfy general notes vapour, branch, the requirement of choosing layer steam injection technology of heavy oil wells, can realize the sealing of oil well oil jacket annular space and two technologies of tubing string thermal compensation simultaneously.Reduce working procedure, reduced the cost of production of oil well, improved economic benefit.
The above is merely the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.For each ingredient of the present invention can make up under the condition of not conflicting each other, any those skilled in the art, equivalent variations of under the prerequisite that does not break away from design of the present invention and principle, having done and modification all should belong to the scope that the present invention protects.
Claims (10)
1. a flexible pressure release type is annotated the vapour packer; Said flexible pressure release type is annotated the vapour packer and comprised: sealing is provided with between central tube (1), outer tube (4), said central tube (1) and the said outer tube (4); The outer expansion cylinder of meeting thermal expansion that is arranged with of said outer tube (4) is characterized in that
Be provided with protection lining (14) between said central tube (1) and the said outer tube (4); Said central tube (1) is connected through protection lining (14) with said outer tube (4), and said protection lining (14) is by processing for exotic material solid-state, that under steam injecting temperature, melt under the normality.
2. flexible pressure release type as claimed in claim 1 is annotated the vapour packer; It is characterized in that; Said protection lining (14) is processed by high-temperature nylon, polyphenylene sulfide, polymeric liquid crystal copolymer or polytetrafluoroethylplastic plastic; The lower end of said central tube (1) is connected with short circuit (15), and the lower end of said outer tube (4) is arranged with box cupling (13), and said protection lining (14) is set between said box cupling (13) and the said short circuit (15).
3. flexible pressure release type as claimed in claim 2 is annotated the vapour packer; It is characterized in that; Said box cupling is connected with said outer tube through screw thread, and said short circuit is socketed in outside the said central tube through screw thread, buckles and buckles outward in said protection lining is provided with; The interior button with said short circuit of said protection lining is connected, and outer the button with said box cupling of said protection lining is connected.
4. flexible pressure release type as claimed in claim 1 is annotated the vapour packer; It is characterized in that; Said expansion cylinder comprises: through welding be set in the annular expansion body (7) on the said outer tube (4) and be positioned at said expansion body (7) and said outer tube (4) between main cavity (8); Said main cavity is equipped with the chemically expansible agent in (8), and said expansion body (7) is a steel material.
5. flexible pressure release type as claimed in claim 4 is annotated the vapour packer, it is characterized in that, said flexible pressure release type is annotated the vapour packer and also comprised: the compensated cavity (10) that communicates with said main cavity (8) passing hole channel, be equipped with said chemically expansible agent in the said compensated cavity (10).
6. flexible pressure release type as claimed in claim 5 is annotated the vapour packer; It is characterized in that; Said compensated cavity (10) is arranged on the below of said main cavity (8), is socketed with fixed cover (20) outside the said outer tube (4), and said compensated cavity (10) is formed by the space between said fixed cover (20) and the said outer tube (4); The wall thickness of said fixed cover (20) sidewall is greater than the wall thickness of said expansion body (7) sidewall, and said fixed cover (20) is the steel material of hardness greater than the hardness of said expansion body (7).
7. flexible pressure release type as claimed in claim 6 is annotated the vapour packer; It is characterized in that; Said flexible pressure release type is annotated the vapour packer and is also comprised: be installed in the pressure release pin (11) on the said outer tube; The material of said expansion body (7) is carbon steel or alloy steel, and the material of said fixed cover (20) is carbon steel or the alloy steel of hardness greater than said expansion body (7).
8. flexible pressure release type as claimed in claim 7 is annotated the vapour packer, it is characterized in that, said pressure release pin (11) is connected with said compensated cavity (10).
9. flexible pressure release type as claimed in claim 6 is annotated the vapour packer; It is characterized in that; Be provided with airtight and watertight padding (5) between said central tube (1) and the said outer tube (4), said airtight and watertight padding (5) is positioned at the upper end of said outer tube (4), and the upper end of said expansion body (7) is provided with the last helmet (6) of annular; The lower end of said expansion body (7) is provided with the following helmet (9) of annular; The said helmet (6) of going up is separately positioned on the said outer tube (4) with said helmet (9) down, saidly goes up helmet (6), said helmet (9) is concordant with the outer rim of said fixed cover (20) down, the external diameter of said expansion body (7) less than said go up helmet (6), said under the external diameter of helmet (9) and said fixed cover (20).
10. flexible pressure release type as claimed in claim 6 is annotated the vapour packer; It is characterized in that; The sidewall of said outer tube (4) is provided with boss (40); Said main cavity (8) and said compensated cavity (10) lay respectively at said boss (40) both sides up and down, are provided with the connecting hole (42) that connects said main cavity (8) and said compensated cavity (10) in the said boss (40), the volume of said compensated cavity (10) account for said main cavity (8) volume 15% to 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104046710A CN102518408A (en) | 2011-12-07 | 2011-12-07 | Telescopic pressure relief type steam injection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104046710A CN102518408A (en) | 2011-12-07 | 2011-12-07 | Telescopic pressure relief type steam injection packer |
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| Publication Number | Publication Date |
|---|---|
| CN102518408A true CN102518408A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104046710A Pending CN102518408A (en) | 2011-12-07 | 2011-12-07 | Telescopic pressure relief type steam injection packer |
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| CN (1) | CN102518408A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108505965A (en) * | 2018-03-23 | 2018-09-07 | 中煤科工集团西安研究院有限公司 | One kind suppressing desealed hydraulic expansion packer and solution encapsulation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106522907A (en) * | 2015-09-15 | 2017-03-22 | 中国石油化工股份有限公司 | Salvageable thermal production well pipe string and application method thereof |
| CN106522871A (en) * | 2015-09-15 | 2017-03-22 | 中国石油化工股份有限公司 | Open hole packer |
| CN106522871B (en) * | 2015-09-15 | 2019-04-05 | 中国石油化工股份有限公司 | A kind of open hole packer |
| CN106522907B (en) * | 2015-09-15 | 2019-04-05 | 中国石油化工股份有限公司 | Salvageable thermal recovery well casing string and its application method |
| CN108505965A (en) * | 2018-03-23 | 2018-09-07 | 中煤科工集团西安研究院有限公司 | One kind suppressing desealed hydraulic expansion packer and solution encapsulation method |
| CN108505965B (en) * | 2018-03-23 | 2020-10-09 | 中煤科工集团西安研究院有限公司 | Pressing and deblocking type hydraulic expansion packer and deblocking method |
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