CN202417415U - Heat-sensitive umbrella-shaped folding type multi-layer packer - Google Patents
Heat-sensitive umbrella-shaped folding type multi-layer packer Download PDFInfo
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- CN202417415U CN202417415U CN2011205406494U CN201120540649U CN202417415U CN 202417415 U CN202417415 U CN 202417415U CN 2011205406494 U CN2011205406494 U CN 2011205406494U CN 201120540649 U CN201120540649 U CN 201120540649U CN 202417415 U CN202417415 U CN 202417415U
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Abstract
The utility model discloses a heat-sensitive umbrella-shaped folding type multi-layer packer. The heat-sensitive umbrella-shaped folding type multi-layer packer comprises a power module, a packing module and a mining module, wherein double power heads of the power module are used for driving a movable outer pipe in the mining module to move up and down and further driving the heat-sensitive umbrella-shaped packing module which can be folded axially and squeezed and enlarged radially to move up and down; a fixed center pipe with a double-layer structure in the mining module is fixedly connected with the double power heads; the fixed center pipe with the double-layer structure can be used as a channel for mining and transporting target minerals, and the design of a bionic upper arch arm is adopted, so that the packing effect of double-layer high temperature-resistant rubber can be effectively improved; and an umbrella-shaped folding rod system structure and a multi-group structure of the packing module can be selected according to packing needs, so that multi-layer packing can be further realized. By applying the heat-sensitive umbrella-shaped folding type multi-layer packer disclosed by the utility model, the mining purity of oil shale and other minerals can be effectively improved, and the mutual pollution degree of the minerals among various reservoirs during the mining process can be reduced.
Description
Technical field
The utility model relates to a kind of multiple packer, is specifically related to a kind of umbrella formula folded form multiple packer that adopts the thermometal sheet, when being used for mineral such as producing oil shale mineral between reservoir is up and down carried out packing effectively.
Background technology
Gas hydrates are that the permafrost band has the characteristics wide, that reserves are huge that distribute by a kind of solid chemical compound that methane and water generate under the cryogenic high pressure condition on land; In addition, need extract the underground water of certain one deck position sometimes during groundwater abstraction, prevent to pollute mutually between the underground water of different layers position; During mineral such as producing oil shale, only needs are exploited the mineral of certain one deck position and are not whole mineral usually.
Therefore, want to realize the purpose of only exploitation, a certain certain layer of transhipment position target mineral, must use packer to realize.
Mostly existing packer is the individual layer packing, and the packing effect is not very desirable, causes up and down that mineral such as the gas hydrates between reservoir, underground water, oil shale pollute mutually, and the quality of quarry thing is had a negative impact.
Summary of the invention
The utility model is for addressing the above problem, provide a kind of easy and simple to handle, simple in structure, to covering the temperature-sensitive umbrella formula folded form multiple packer that the stratum has good packing effect down.
The utility model is realized through following scheme:
A kind of temperature-sensitive umbrella formula folded form multiple packer comprises power plant module, packing module and exploitation module;
Wherein, power plant module includes double power head rig 1, double power head 2 and pump 3; The double-deck fixed center pipe 5 that has in the exploitation module is fixedly connected with double power head 2;
The movable outer tube 4 that described double power head 2 drives in the exploitation modules moves downward, so drive can axially fold, last platen 14 and umbrella formula packing leverage in the radially squeezed packing module.
Particularly, packing module comprises upper sleeve post 6, upper top cover 7, big footpath shrinking connecting-rod 8, path shrinking connecting-rod 9, top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11, upper press cover 12, bolt 13, goes up platen 14, double-deck high-temperature resistant rubber 15, bionical up-bow arm 16, fixed connecting plate 17, bend arm 18, platen 19, transition bow arm connecting rod 20, transition platen 21, lower cover 22, thermometal sheet 23, casing nipple 26 and bottom casing string 27 down down;
The exploitation module comprises movable outer tube 4, fixed center pipe 5, Expansion spray tube 24 and suction tube 25.
Described double power head rig 1 moves up and down through double power head 2 drive activity outer tubes 4, moves up and down thereby drive the packing module, realizes the axially folding, radially squeezed of packing module, thus under cover the stratum and carry out packing; In addition, 2 pairs of fixed center pipes 5 of double power head play the effect of fixed limit.
Fixed center pipe 5 is a double-decker, thereby forms outer annulus and internal layer tubular space, pumps into high-pressure water heating or steam downwards by outer annulus, from Expansion spray tube 24 ejections; The target mineral are drawn into the face of land through the internal layer tubular space of suction tube 25, fixed center pipe 5, and the bottom seals of fixed center pipe 5 prevents that mineral and hot water from covering the stratum under getting into;
By pump 3 power of inject high pressure hot water with suction target mineral is provided, thereby realizes exploitation, the transhipment of target mineral;
Be provided with segment length's groove corresponding to target layer mineral place on movable outer tube 4 sidewalls, Expansion spray tube 24 reaches the target layer mineral with suction tube 25 from this elongated slot;
Shrinking connecting-rod 8 upper ends, big footpath are fixed on upper top cover 7 soffits, and path shrinking connecting-rod 9 lower ends are fixed on upper press cover 12 upper surfaces, are slidingly connected between big footpath shrinking connecting-rod 8 and the path shrinking connecting-rod 9, the packing module are played the effect of guide and limit;
Top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11 have curved-surface structure at upper and lower edge respectively, match with the circular shape of double-deck high-temperature resistant rubber 15, improve the effect of packing;
Movable outer tube 4 passes the through hole of upper top cover 7, and the through hole side of upper top cover 7 and movable outer tube 4 tight fits, plays the effect of guide and limit and one-level packing.
At least three following platens 19 are separately fixed at the relevant position, bottom of fixed center pipe 5, and lower cover 22 is fixed by bolts to the bottom of fixed center pipe 5.
The upper end of double-deck high-temperature resistant rubber 15 is grasped by upper press cover 12 and last platen 14, and the lower end of double-deck high-temperature resistant rubber 15 is grasped with lower cover 22 by the following platen 19 of the bottom.
The structure that bionical up-bow arm 16 is copied people's pin; Comprise shank, heel and tiptoe; Bionical up-bow arm 16 upper ends are equivalent to the shank of human body, and hinged with last platen 14, bionical up-bow arm 16 lower ends are equivalent to the heel and the tiptoe of human body; Tiptoe partly is in the knee of double-deck high-temperature resistant rubber 15, and heel part is with bow arm 18 is hinged down;
At least two transition platens 21 are slidingly connected at relevant position, fixed center pipe 5 lower end, and the end of transition platen 21 is hinged with the position near the middle part of bending arm 18 down with transition bow arm connecting rod 20;
The bionical up-bow arm 16 of bottom at least two groups, down bend arm 18, down the type of attachment and the above-mentioned type of attachment of platen 19, transition bow arm connecting rod 20 and transition platen 21 are similar, repeat no more here;
Select the group number of packing as required, can realize multistage packing.
Alternatively, bionical up-bow arm 16 and bow arm 18 down can be at last platens 14, arrange many groups equably on the circumferencial direction of platen 19 and transition platen 21 down, be preferably four groups more than the time, can carry out better packing to double-deck high-temperature resistant rubber 15.
The course of work of the utility model is:
The first step on the face of land, is screwed onto casing nipple 26 corresponding positions with top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11; The bottom that upper top cover 7 tight fits are installed in movable outer tube 4 is fixed on the soffit of upper top cover 7 with big footpath shrinking connecting-rod 8 slightly on the top, and path shrinking connecting-rod 9 is fixed on upper press cover 12 upper surfaces; Upper press cover 12 is fixed by bolts to the bottom of movable outer tube 4; Other parts in the packing module are connected the relevant position according to above-mentioned connected mode;
Second step was lowered into packing module and exploitation module underground, made the packing module cover the stratum being under, exploited module and was in the target layer mineral;
In the 3rd step, the double power head 2 drive activity outer tubes 4 in the power plant module are being with upper top cover 7 to move downward, and when upper top cover 7 touched the top edge curved surface back-up ring 10 of uppermost position in fig-ure, upper top cover 7 stop motions realized the one-level packing; Movable outer tube 4 continues to move downward; And through each bionical up-bow arm 16 swings of last platen 14 drives; Whole packing module is folded, extends out; The heel position of bionical up-bow arm 16 is overhanging, and then oppresses double-deck high-temperature resistant rubber 15 and top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11, realizes main packing; Above-mentioned action is similar to the action that struts umbrella;
The 4th step pumped into high-pressure water heating or steam by pump 3 downwards from fixed center pipe 5 outer annuluses, and from Expansion spray tube 24 ejections, the target mineral are broken, and broken target mineral are drawn into the face of land through suction tube 25; Meanwhile, because the hot water or the steam of high temperature make thermometal sheet 23 dilatancies, thereby can realize auxiliary packing;
In the 5th step, after the target mineral mining was accomplished, with carrying on the movable outer tube 4, packing module in bottom bounced back, and then whole packing module and exploitation module are risen to the face of land.
The temperature-sensitive umbrella formula folded form multiple packer of the utility model has the following advantages and beneficial effect: can be used as the passage of exploitation, migration target mineral through double-deck fixed center pipe, and simple in structure, easy to operate; The design of bionical up-bow arm has improved the packing effect of double-deck high-temperature resistant rubber effectively; The umbrella formula folding rod architecture of packing module can realize the multilayer packing with many group structures, further improves the packing effect.The utility model can improve effectively mineral such as oil shale exploitation purity, reduce the degree that the mineral between each reservoir pollute mutually in the recovery process, have good application prospects.
Description of drawings
Fig. 1 is a temperature-sensitive umbrella formula folded form multiple packer general illustration
Fig. 2 is the packing module diagram
Fig. 3 is the enlarged drawing of the elongated slot of Expansion spray tube, suction tube and movable outer tube
Fig. 4 is the structure chart of bionical up-bow arm
Among the figure:
1 double power head rig, 2 double power heads, 3 pumps, 4 movable outer tubes, 5 fixed center pipes, 6 upper sleeve posts,
7 upper top covers, 8 big footpath shrinking connecting-rods, 9 path shrinking connecting-rods, 10 top edge curved surface back-up rings, 11 lower limb curved surface back-up rings,
12 upper press covers, 13 bolts, platen on 14,15 double-deck high-temperature resistant rubbers, 16 bionical up-bow arms, 17 fixed connecting plates,
18 times bow arms, 19 times platens, 20 transition bow arm connecting rod, 21 transition platens, 22 lower covers, 23 thermometal sheets,
24 Expansion spray tubes, 25 suction tubes, 26 casing nipples, 27 bottom casing strings,
The A superstratum, B target layer mineral covers the stratum under the C, 101 elongated slots, 102 outer annuluses,
103 internal layer tubular spaces, 201 tiptoes, 202 shanks, 203 heels.
The specific embodiment
Do further explain below in conjunction with accompanying drawing and embodiment:
Fig. 1 is temperature-sensitive umbrella formula folded form multiple packer general illustration, and is as shown in the figure, and a kind of temperature-sensitive umbrella formula folded form multiple packer of the utility model comprises power plant module, packing module and exploitation module;
Wherein, power plant module includes double power head rig 1, double power head 2 and pump 3;
Fig. 2 is the packing module diagram, and the packing module comprises upper sleeve post 6, upper top cover 7, big footpath shrinking connecting-rod 8, path shrinking connecting-rod 9, top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11, upper press cover 12, bolt 13, goes up platen 14, double-deck high-temperature resistant rubber 15, bionical up-bow arm 16, fixed connecting plate 17, bend arm 18, platen 19, transition bow arm connecting rod 20, transition platen 21, lower cover 22, thermometal sheet 23, casing nipple 26 and bottom casing string 27 down down;
Adopt the mode of three layers of packing in the present embodiment, promptly have three following platens 19 and two transition platens 21, the compartment of terrain is arranged in the bottom of fixed center pipe 5.
The exploitation module comprises movable outer tube 4, fixed center pipe 5, Expansion spray tube 24 and suction tube 25.
Described double power head rig 1 moves up and down through double power head 2 drive activity outer tubes 4, moves up and down thereby drive the packing module, realizes the axially folding, radially squeezed of packing module, thus under cover the stratum and carry out packing; In addition, 2 pairs of fixed center pipes 5 of double power head play the effect of fixed limit.
Fig. 3 is the enlarged drawing of the elongated slot of Expansion spray tube, suction tube and movable outer tube; Visible from figure, described fixed center pipe 5 is a double-decker, thereby forms outer annulus and internal layer tubular space; Pump into high-pressure water heating or steam downwards by outer annulus, from Expansion spray tube 24 ejections; The target mineral are drawn into the face of land through the internal layer tubular space of suction tube 25, fixed center pipe 5, and the bottom seals of fixed center pipe 5 prevents that mineral and hot water from covering the stratum under getting into;
By pump 3 power of inject high pressure hot water with suction target mineral is provided, thereby realizes exploitation, the transhipment of target mineral;
Be provided with segment length's groove corresponding to target layer mineral place on movable outer tube 4 sidewalls, Expansion spray tube 24 reaches the target layer mineral with suction tube 25 from this elongated slot;
Shrinking connecting-rod 8 upper ends, big footpath are fixed on upper top cover 7 soffits, and path shrinking connecting-rod 9 lower ends are fixed on upper press cover 12 upper surfaces, are slidingly connected between big footpath shrinking connecting-rod 8 and the path shrinking connecting-rod 9, the packing module are played the effect of guide and limit;
Top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11 have curved-surface structure at upper and lower edge respectively, match with the circular shape of double-deck high-temperature resistant rubber 15, improve the effect of packing;
Casing nipple 26 inwalls are provided with screw thread, and top edge curved surface back-up ring 10 is fixedly connected on the inwall of casing nipple 26 through screw thread with lower limb curved surface back-up ring 11.
Movable outer tube 4 passes the through hole of upper top cover 7, and the through hole side of upper top cover 7 and movable outer tube 4 tight fits, plays the effect of guide and limit and one-level packing.
Three following platens 19 are separately fixed at the relevant position, bottom of fixed center pipe 5, and lower cover 22 is fixed by bolts to the bottom of fixed center pipe 5.
The upper end of double-deck high-temperature resistant rubber 15 is grasped by upper press cover 12 and last platen 14, and the lower end of double-deck high-temperature resistant rubber 15 is grasped with lower cover 22 by the following platen 19 of the bottom in three following platens 19.
Fig. 4 is the structure chart of bionical up-bow arm; The structure that described bionical up-bow arm 16 is copied people's pin comprises shank, heel and tiptoe, and bionical up-bow arm 16 upper ends are equivalent to the shank of human body; Hinged with last platen 14; Bionical up-bow arm 16 lower ends are equivalent to the heel and the tiptoe of human body, and tiptoe partly is in the knee of double-deck high-temperature resistant rubber 15, and heel part is with bow arm 18 is hinged down;
Two transition platens 21 are slidingly connected at relevant position, fixed center pipe 5 lower end, and the end of transition platen 21 is hinged with the position near the middle part of bending arm 18 down with transition bow arm connecting rod 20;
The bionical up-bow arm 16 that the bottom is two groups, down bend arm 18, down the type of attachment and the above-mentioned type of attachment of platen 19, transition bow arm connecting rod 20 and transition platen 21 are similar, repeat no more here; Select packing group number as required, and then realize more stable multistage packing more than three groups.
In the present embodiment; Bionical up-bow arm 16 and bow arm 18 are down arranged four groups equably on the circumferencial direction of last platen 14, time platen 19 and transition platen 21; Certainly, layout group number can carry out better packing to double-deck high-temperature resistant rubber 15 greater than 4 o'clock, and this is similar to the support of umbrella; The groups of holders number is got over for a long time, and what umbrella cover can be supported is more complete.
The course of work of the utility model is:
The first step on the face of land, is screwed onto casing nipple 26 corresponding positions with top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11; The bottom that upper top cover 7 tight fits are installed in movable outer tube 4 is fixed on the soffit of upper top cover 7 with big footpath shrinking connecting-rod 8 slightly on the top, and path shrinking connecting-rod 9 is fixed on upper press cover 12 upper surfaces; Upper press cover 12 is fixed by bolts to the bottom of movable outer tube 4; Other parts in the packing module are connected the relevant position according to above-mentioned connected mode;
Second step was lowered into packing module and exploitation module underground, made the packing module cover the stratum being under, exploited module and was in the target layer mineral;
In the 3rd step, the double power head 2 drive activity outer tubes 4 in the power plant module are being with upper top cover 7 to move downward, and when upper top cover 7 touched the top edge curved surface back-up ring 10 of uppermost position in fig-ure, upper top cover 7 stop motions realized the one-level packing; Movable outer tube 4 continues to move downward; And through each bionical up-bow arm 16 swings of last platen 14 drives; Whole packing module is folded, extends out; The heel position of bionical up-bow arm 16 is overhanging, and then oppresses double-deck high-temperature resistant rubber 15 and top edge curved surface back-up ring 10, lower limb curved surface back-up ring 11, realizes main packing; Above-mentioned action is similar to the action that struts umbrella;
The 4th step pumped into high-pressure water heating or steam by pump 3 downwards from fixed center pipe 5 outer annuluses, and from Expansion spray tube 24 ejections, the target mineral are broken, and broken target mineral are drawn into the face of land through suction tube 25; Meanwhile, because the hot water or the steam of high temperature make thermometal sheet 23 dilatancies, thereby can realize auxiliary packing;
In the 5th step, after the target mineral mining was accomplished, with carrying on the movable outer tube 4, packing module in bottom bounced back, and then whole packing module and exploitation module are risen to the face of land.
The foregoing description only is used to explain the utility model; Wherein group number of the structure of each parts, connected mode and packing etc. all can change to some extent; Every equivalents of on the basis of the utility model technical scheme, carrying out and improvement all should not got rid of outside the protection domain of the utility model.
Claims (9)
1. a temperature-sensitive umbrella formula folded form multiple packer comprises power plant module, packing module and exploitation module; Power plant module includes double power head rig (1), double power head (2) and pump (3), it is characterized in that:
The double-deck fixed center pipe (5) that has in the described exploitation module is fixedly connected with double power head (2);
Upper top cover (7) in the described packing module is slidingly connected with movable outer tube (4), and last platen (14) is fixedly connected with movable outer tube (4), and following platen (19) is fixedly connected with fixed center pipe (5), and transition platen (21) is slidingly connected with fixed center pipe (5);
The movable outer tube (4) that described double power head (2) drives in the exploitation module moves downward, so drive can axially fold, last platen (14) and umbrella formula packing leverage in the radially squeezed packing module.
2. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 1; It is characterized in that: described exploitation module comprises movable outer tube (4), fixed center pipe (5), Expansion spray tube (24) and suction tube (25); Described fixed center pipe (5) is a double-decker, has outer annulus and internal layer tubular space, and Expansion spray tube (24) links to each other with outer annulus; Suction tube (25) links to each other with the internal layer tubular space, the bottom seals of fixed center pipe (5).
3. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 1 and 2; It is characterized in that: be provided with segment length's groove corresponding to target layer mineral place on described movable outer tube (4) sidewall, Expansion spray tube (24) and suction tube (25) reach the target layer mineral from this elongated slot.
4. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 1; It is characterized in that: describedly can axially fold, radially squeezed packing module comprises upper sleeve post (6), upper top cover (7), big footpath shrinking connecting-rod (8), path shrinking connecting-rod (9), top edge curved surface back-up ring (10), lower limb curved surface back-up ring (11), upper press cover (12), bolt (13), go up platen (14), double-deck high-temperature resistant rubber (15), bionical up-bow arm (16), fixed connecting plate (17), bend arm (18), at least three following platens (19), transition bow arm connecting rod (20), at least two transition platens (21), lower cover (22), thermometal sheet (23), casing nipple (26) and bottom casing string (27) down, described top edge curved surface back-up ring (10) and lower limb curved surface back-up ring (11) are fixedly connected on the inwall of casing nipple (26); Movable outer tube (4) passes the through hole of upper top cover (7), and the through hole side of upper top cover (7) and movable outer tube (4) tight fit; Upper press cover (12) is fixed on movable outer tube (4) external surface, and last platen (14) is fixed on the bottom of movable outer tube (4);
At least three following platens (19) are separately fixed at the relevant position, bottom of fixed center pipe (5), and lower cover (22) is fixed on the lowermost end of fixed center pipe (5).
5. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 4; It is characterized in that: described big footpath shrinking connecting-rod (8) upper end is fixed on upper top cover (7) soffit; Path shrinking connecting-rod (9) lower end is fixed on upper press cover (12) upper surface, is slidingly connected between big footpath shrinking connecting-rod (8) and the path shrinking connecting-rod (9).
6. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 4; It is characterized in that: the upper end of described double-deck high-temperature resistant rubber (15) is grasped by upper press cover (12) and last platen (14); The lower end of double-deck high-temperature resistant rubber (15) is grasped by the following platen (19) of the bottom and lower cover (22), and thermometal sheet (23) is bonded between the double-deck high-temperature resistant rubber (15).
7. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 4; It is characterized in that: described at least two transition platens (21) are slidingly connected at fixed center pipe (5) relevant position, lower end, and the end of transition platen (21) is hinged with the position near the middle part of bending arm (18) down with transition bow arm connecting rod (20).
8. a kind of temperature-sensitive umbrella formula folded form multiple packer according to claim 4; It is characterized in that: described bionical up-bow arm (16) is copied the structure of people's pin, comprises shank, heel and tiptoe, and bionical up-bow arm (16) upper end is equivalent to the shank of human body; Hinged with last platen (14); Bionical up-bow arm (16) lower end is equivalent to the heel and the tiptoe of human body, and tiptoe partly is in the knee of double-deck high-temperature resistant rubber (15), and heel part is with bow arm (18) is hinged down.
9. according to each described a kind of temperature-sensitive umbrella formula folded form multiple packer in the claim 4 to 8, it is characterized in that: described bionical up-bow arm (16) and following bow arm (18) are arranged more than four groups on the circumferencial direction of last platen (14), following platen (19) and transition platen (21) equably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205406494U CN202417415U (en) | 2011-12-21 | 2011-12-21 | Heat-sensitive umbrella-shaped folding type multi-layer packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205406494U CN202417415U (en) | 2011-12-21 | 2011-12-21 | Heat-sensitive umbrella-shaped folding type multi-layer packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417415U true CN202417415U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205406494U Expired - Fee Related CN202417415U (en) | 2011-12-21 | 2011-12-21 | Heat-sensitive umbrella-shaped folding type multi-layer packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417415U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418494A (en) * | 2011-12-21 | 2012-04-18 | 吉林大学 | Heat-sensitive umbrella type folded multilayer packer |
| CN107605422A (en) * | 2017-10-20 | 2018-01-19 | 吉林大学 | For the combined type packer under high temperature and high pressure condition and packing method |
-
2011
- 2011-12-21 CN CN2011205406494U patent/CN202417415U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418494A (en) * | 2011-12-21 | 2012-04-18 | 吉林大学 | Heat-sensitive umbrella type folded multilayer packer |
| CN102418494B (en) * | 2011-12-21 | 2013-12-04 | 吉林大学 | Heat-sensitive umbrella type folded multilayer packer |
| CN107605422A (en) * | 2017-10-20 | 2018-01-19 | 吉林大学 | For the combined type packer under high temperature and high pressure condition and packing method |
| CN107605422B (en) * | 2017-10-20 | 2023-04-25 | 吉林大学 | Combined packer and packing method for high-temperature high-pressure working condition |
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Granted publication date: 20120905 Termination date: 20121221 |