CN115874970A - Bidirectional pressure-bearing wedge type sealer - Google Patents
Bidirectional pressure-bearing wedge type sealer Download PDFInfo
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- CN115874970A CN115874970A CN202310214919.XA CN202310214919A CN115874970A CN 115874970 A CN115874970 A CN 115874970A CN 202310214919 A CN202310214919 A CN 202310214919A CN 115874970 A CN115874970 A CN 115874970A
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Abstract
The invention provides a bidirectional pressure-bearing wedge type sealer which comprises an upper centralizer (2) and a sealing wedge (3) sleeved on a hollow cone body (4) from top to bottom, and further comprises a wedge containing pipe (5) and a lower centralizer (6), wherein the Rong Xieguan (5) is installed at the bottom of the cone body (4), and the lower centralizer (6) is sleeved on the Rong Xieguan (5). The invention has the beneficial effects that: this scheme can realize two-way pressure-bearing, can deal with bigger backpressure, and better assurance leakproofness is difficult for sliding, and application scope is wider, and during the use, sealed wedge tightly pastes mutually with sleeve pipe (7) inner wall under the extrusion, keeps the relative position of this device fixed, and difficult not hard up need additionally hang on the tubular column again. The reverse well washing and the forward well washing can play a role, and the applicable range is wider.
Description
Technical Field
The invention belongs to the technical field of oil field development and production equipment, and particularly relates to a bidirectional pressure-bearing wedge type sealer.
Background
The well sealing tool frequently used at present is a packer, and the general packer has the following problems: the effective period is short, and the product generally loses efficacy in about one year; the pressure bearing is low, the forward direction is less than 25MPa, and the reverse direction is less than 8MPa; the damaged packer is easy to cause the major repair of an oil well, and the major repair rate of the common packer which is put into the well for more than one year exceeds 60 percent; the hardness of metal teeth on a common packer is higher than that of the inner wall of a shaft, when the packer is used, an external force is needed to bite the packer into the inner wall of the shaft to fix the packer, and under alternating load, gaps at the bite position are larger and deeper, so that the inner wall of the shaft (casing) is easily damaged.
Prior art CN105239956A, published 2016, 1, 3, discloses a wedge sealer. However, the following problems exist in the using process: 1. the sealing device can only bear pressure in one direction, and when the sealing device is subjected to a slightly larger reverse pressure, the annular sealing wedge in the sealing device is easy to slide upwards to lose the sealing effect; 2. when the oil pumping pipe works, fluid can flow in a forward and reverse reciprocating mode, and the device is easy to loose and displace due to the fact that the device can only bear pressure in a single direction, so that the device needs to be hung on a pipe column during installation and keeps the position of the device fixed; 3. the application range is smaller, and the sealing function can be exerted only when the reverse well-flushing leakage of the oil pumping well is lost, because of the positive pressure, the sealing function can not be exerted at other times.
Disclosure of Invention
In view of the above, the invention aims to provide a packing tool which can overcome all the defects of the existing products, has completely different structures, can bear pressure in two directions in a shaft casing, is matched with a lost hand head or a load-limiting short joint to play a sealing role in a shaft independently and has wider application, and the invention provides a two-way pressure-bearing wedge type sealer.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a bidirectional pressure-bearing wedge type sealer comprises an upper centralizer 2 and a sealing wedge 3 which are sleeved on a hollow cone 4 from top to bottom, and further comprises a wedge accommodating pipe 5 and a lower centralizer 6, wherein the wedge accommodating pipe 5 is installed at the bottom of the cone 4, and the lower centralizer 6 is sleeved on the wedge accommodating pipe 5;
the sealing wedge 3 is formed by sleeving an outer cylinder and an inner cylinder, and the outer cylinder is sleeved on the outer side of the inner cylinder;
a plurality of first sealing structures which are annularly distributed are arranged on the pipe wall of the inner side of the inner cylinder;
the outer surface of the cone 4 is provided with a plurality of second sealing structures distributed annularly, the second sealing structures are matched with a plurality of first sealing structures distributed annularly on the inner side pipe wall of the inner cylinder, and the outer diameter of the lower section of the cone 4 is gradually increased from top to bottom.
Furthermore, the middle part of the outer side pipe wall of the inner cylinder is provided with an annular sealing bulge, and the outer diameter of the upper part of the inner cylinder is larger than that of the middle lower part; a circle of lug boss is arranged on the outer side of the upper edge of the inner cylinder;
the outer barrel is sleeved on the middle lower portion of the inner barrel, an annular sealing groove matched with the annular sealing bulge of the inner barrel is formed in the upper portion of the pipe wall on the inner side of the outer barrel, and a plurality of gaps are formed in the pipe wall of the outer barrel.
Further, the outer cylinder and the inner cylinder are made of elastic materials.
Furthermore, the first sealing structure on the inner side pipe wall of the inner cylinder is divided into an upper part and a lower part, the upper part is provided with a plurality of annular sealing grooves, and the middle lower part is provided with a plurality of annular first barbs or first convex rings; the middle section of 4 surfaces of centrum is provided with a plurality of sealing rings, and the hypomere is provided with a plurality of annular second barbs or second bulge loops, still is provided with cyclic annular microgroove between each second barb and the second bulge loop.
Furthermore, the upper centralizer 2 and the lower centralizer 6 are of hollow structures, and a plurality of grooves extending from the top to the bottom are formed in the outer side of the centralizers.
Furthermore, one end of the upper centralizer 2 and one end of the lower centralizer 6 are hollow cylinders, and the other end of the upper centralizer and the other end of the lower centralizer are hollow cones.
Further, the wedge accommodating tube 5 is a hollow cylinder with an outer diameter smaller than that of the bottom end of the vertebral body 4, and the top end of the wedge accommodating tube 5 is connected with the bottom of the vertebral body 4.
Further, the bottom end of the wedge accommodating pipe 5 can be blocked, or a one-way throttle valve is installed.
The invention has the advantages and positive effects that: this scheme can realize two-way pressure-bearing, can deal with bigger backpressure, and better assurance leakproofness is difficult for sliding, and application scope is wider, and during the use, sealed wedge tightly pastes with 7 inner walls of sleeve pipe mutually under the extrusion, keeps the relative position of this device fixed, and difficult not hard up need additionally hang on the tubular column again. The reverse well washing and the forward well washing can play a role, and the applicable range is wider.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the present invention in an initial stage of assembly;
FIG. 2 is a schematic view of the installation of the sealing wedge and vertebral body of the present invention;
FIG. 3 is a schematic view of the sealing wedge of the present invention as it descends from the small diameter segment to the end of the vertebral body (the large diameter segment);
FIG. 4 is a schematic view of the sealing wedge of the present invention as it is lowered into the wedge tube;
FIG. 5 is a schematic structural diagram of the outer cylinder of the sealing wedge in the invention;
FIG. 6 is a schematic structural view of an inner cylinder of the sealing wedge of the present invention;
FIG. 7 is a schematic view of the structure of a vertebral body according to the present invention;
FIG. 8 is a longitudinal cross-sectional view of the centralizer of the present invention;
FIG. 9 is a cross-sectional view of the centralizer of the present invention;
fig. 10 is a schematic view of the outer surface of the lower portion of a vertebral body of the present invention with a raised collar.
Reference numerals: 1-lifting the short section; 2-mounting a centralizer; 3-sealing wedge; 4-vertebral body; 5-Rong Xieguan; 6-lower centralizer; 7-a sleeve; 8-one-way throttle valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention, and the embodiments and features of the embodiments of the present invention can be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially in general scale for convenience of description when describing the embodiments of the present invention, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and height should be included in the actual fabrication.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in FIG. 1, the invention comprises an upper centralizer 2 and a sealing wedge 3 sleeved on a hollow cone 4 from top to bottom, and also comprises a wedge accommodating tube 5 and a lower centralizer 6, wherein the wedge accommodating tube 5 is arranged at the bottom of the cone 4, and the lower centralizer 6 is sleeved on the wedge accommodating tube 5;
as shown in fig. 8 and 9, the upper centralizer 2 and the lower centralizer 6 are hollow structures made of nylon materials, one end of each of the centralizers is a hollow cylinder, the other end of each of the centralizers is a hollow cone, and a plurality of grooves extending from the top to the bottom are formed in the outer side of each of the centralizers;
as shown in fig. 2, 5 and 6, the sealing wedge 3 is formed by sleeving an outer cylinder and an inner cylinder; the outer cylinder is a nylon cylinder, the inner cylinder is a rubber cylinder, and the outer cylinder and the inner cylinder are tightly attached.
The upper part of the pipe wall of the inner side of the rubber cylinder is provided with an annular sealing groove, the middle lower part of the pipe wall of the inner side of the rubber cylinder is provided with a plurality of first barbs distributed in an annular manner, the middle part of the pipe wall of the outer side of the rubber cylinder is provided with an annular sealing bulge, and the outer diameter of the upper part of the rubber cylinder is larger than that of the middle lower part of the pipe wall; a circle of boss is arranged on the outer side of the upper edge of the rubber cylinder; the outer diameter of the boss is slightly larger than the inner diameter of the sleeve, after the rubber cylinder enters the sleeve, the boss is in interference fit with the sleeve to block a gap between the rubber cylinder and the sleeve, and when the rubber cylinder works, pressure can be borne, and fluid cannot enter the gap.
The nylon cylinder is sleeved at the middle lower part of the rubber cylinder, the upper part of the inner side pipe wall of the nylon cylinder is provided with an annular sealing groove matched with the annular sealing bulge of the rubber cylinder, and the pipe wall of the nylon cylinder is provided with a plurality of gaps which extend along the axial direction and are not intersected with each other;
an outer chamfer is arranged at the bottom of the outer side of the nylon cylinder.
As shown in fig. 7, the upper section of the outer surface of the vertebral body 4 is smooth and can be replaced by a short section for placing an upper centralizer, the middle section is provided with a sealing ring, and the lower section is provided with a plurality of second barbs distributed annularly and adapted to a sealing groove and a first barb which are arranged on the inner side tube wall of the inner tube; the inner diameter of the inner cylinder of the sealing wedge 3 is gradually increased from top to bottom. During the installation, sealing wedge 3 down overlaps on centrum 4 from last, because the internal diameter of the first barb part in inner tube lower part is greater than the external diameter at centrum upper portion and middle part, sealing wedge 3 moves down smoothly, and the seal groove that reaches inner tube upper portion moves the seal ring position at centrum middle part, and the seal groove is equivalent with the seal ring diameter, mutually supports, and under the low pressure condition at installation initial stage, sealing wedge 3 stops down, and centrum 4 and sealing wedge 3 relative position are fixed.
The first barb can be replaced by the first convex ring, the second barb can be replaced by the second convex ring, and the first barb and the second barb can also be replaced by annular grains and the like, can appear independently and can also appear in a combined mode.
The outer diameters of the upper section and the middle section of the vertebral body 4 are the same, and the outer diameter of the lower section is gradually increased from top to bottom.
The barb structure can be changed into a convex ring structure when the pressure is low, as shown in figure 10. A plurality of annular fine grains can be arranged between each barb structure. Or the barbs and the convex rings are alternately arranged.
The wedge containing pipe 5 is a hollow cylinder with the outer diameter smaller than that of the vertebral body 4, and the top end of the wedge containing pipe 5 is connected with the bottom of the vertebral body 4 through threads.
If the bottom ends of the wedge accommodating pipes 5 do not need to be communicated, a plug part can be selected to block according to the situation; if the fluid is required to pass through, a one-way throttle valve 8 can be arranged at the bottom end of the wedge-containing pipe 5.
When the device is used, a missing hand head or a load-limiting short section (used when the structure is lost in a well) or a lifting short section (used when the structure is not lost in the well) is installed at the top of the cone 4, all parts are installed in sequence, the cylindrical ends of the upper centralizer 2 and the lower centralizer 6 are oppositely placed, the upper centralizer 2 and the lower centralizer 6 are tightly attached to the inner wall of the casing 7 when the device is lowered into the well, the sealing wedge 3 can be protected from being scratched by the inner wall of the casing 7, and therefore the device can smoothly enter a preset position. Upon entry into the well, the sealing wedge 3 is located in the upper middle portion of the vertebral body 4, as shown in fig. 1.
After the structure enters a preset position, an oil pipe gate is closed, a backwashing well is pressurized, and fluid extrudes the sealing wedge 3 to be tightly attached to the outer wall of the cone 4 and the inner wall of the casing 7 to wedge downwards. As the pressure increases, the sealing wedge 3 wedges more tightly into the annular space formed by the outer wall of the cone 4 and the inner wall of the cannula 7. The annular first sealing structure on the pipe wall on the inner side of the rubber cylinder and the annular second sealing structure on the outer wall of the cone 4 are mutually staggered and extruded to be tightly buckled with each other to form a plurality of sealing rings which can not move mutually within a certain pressure range, so that fluid can not pass through the sealing rings, and the sealing rings are tightly attached to the inner wall of the sleeve and fixed on the inner wall of the sleeve. Meanwhile, the sealing wedge 3 is tightly attached to the inner wall of the sleeve 7 under the extrusion action, so that the sealing wedge cannot move under the action of force from top to bottom or from bottom to top within a large force bearing range. The purposes of bidirectional sealing and fixing the position of the sealing ring are achieved. As shown in fig. 3. Compared with the original sealer, the reverse direction can bear larger pressure.
After the preset pressure is finished, if a throwing head is arranged at the top of the vertebral body 4, a throwing head pin needs to be pressed and cut off (the throwing head belongs to a national standard product and can be directly purchased); if the load-limiting short section is installed, the lifting pipe column is disconnected from the end face of the weak point of the load-limiting short section. Thus, the structure can be lost in the well bore.
If the bottom end of the wedge containing pipe 5 is provided with a dead plug, the upper part and the lower part are not communicated; if the bottom end of the wedge-containing pipe 5 is connected with the one-way throttle valve 8, the lower fluid can flow upwards, but the upper fluid cannot flow downwards.
When the device finishes the mission or needs to be unsealed for other reasons and is taken out from the shaft, the lower pipe column drags the releasing head (the fishing tool is a standard product) or the load-limiting short section, the upper pipe column lifts up the cone 4 to move upwards and separate from the sealing wedge 3, and the sealing wedge 3 falls into the position of the wedge containing pipe 5 because of no adhesion. Or the backwashing well is pressed, the sealing wedge 3 is wedged downwards more, and when the pressure is enough, the sealing wedge 3 can be separated from the vertebral body 4 and sleeved on the small-diameter wedge containing pipe 5. At this time, the structure can be lifted out of the shaft along with the pipe column. As shown in fig. 4.
This scheme can realize two-way pressure-bearing, can deal with bigger backpressure, and better assurance leakproofness is difficult for sliding, and application scope is wider, and during the use, sealed wedge tightly pastes with 7 inner walls of sleeve pipe mutually under the extrusion, keeps the relative position of this device fixed, and difficult not hard up need additionally hang on the tubular column again. The reverse well washing and the forward well washing can play a role, and the applicable range is wider.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The utility model provides a two-way pressure-bearing wedge type sealer which characterized in that: the sealing device comprises an upper centralizer (2) and a sealing wedge (3) which are sleeved on a hollow cone body (4) from top to bottom, and further comprises a wedge accommodating pipe (5) and a lower centralizer (6), wherein the Rong Xieguan (5) is installed at the bottom of the cone body (4), and the lower centralizer (6) is sleeved on the Rong Xieguan (5);
the sealing wedge (3) is formed by sleeving an outer cylinder and an inner cylinder, and the outer cylinder is sleeved on the outer side of the inner cylinder;
a plurality of first sealing structures which are annularly distributed are arranged on the pipe wall of the inner side of the inner cylinder;
the outer surface of the cone body (4) is provided with a plurality of second sealing structures distributed annularly, the second sealing structures are matched with a plurality of first sealing structures distributed annularly on the pipe wall of the inner side of the inner cylinder, and the outer diameter of the lower section of the cone body (4) is gradually increased from top to bottom.
2. The double-direction pressure-bearing wedge sealer according to claim 1, wherein: the middle part of the outer side pipe wall of the inner cylinder is provided with an annular sealing bulge, and the outer diameter of the upper part of the inner cylinder is larger than that of the middle lower part; a circle of lug boss is arranged on the outer side of the upper edge of the inner cylinder;
the outer barrel is sleeved on the middle lower portion of the inner barrel, an annular sealing groove matched with the annular sealing bulge of the inner barrel is formed in the upper portion of the pipe wall on the inner side of the outer barrel, and a plurality of gaps are formed in the pipe wall of the outer barrel.
3. The double-direction pressure-bearing wedge sealer according to claim 1, wherein: the outer cylinder and the inner cylinder are made of elastic materials.
4. The double-direction pressure-bearing wedge sealer according to claim 1, wherein: the first sealing structure on the inner side pipe wall of the inner cylinder is divided into an upper part and a lower part, the upper part is provided with a plurality of annular sealing grooves, and the middle lower part is provided with a plurality of annular first barbs or first convex rings; the middle section of centrum (4) surface is provided with a plurality of sealing rings, and the hypomere is provided with a plurality of annular second barb or second bulge loop, still is provided with cyclic annular fine grain between each second barb and the second bulge loop.
5. The double-direction pressure-bearing wedge sealer according to claim 1, wherein: the upper centralizer (2) and the lower centralizer (6) are of hollow structures, and a plurality of grooves extending from the top to the bottom are formed in the outer side of the centralizers.
6. The double-direction pressure-bearing wedge sealer according to claim 5, wherein: one end of the upper centralizer (2) and one end of the lower centralizer (6) are hollow cylinders, and the other end of the upper centralizer and the other end of the lower centralizer are hollow cones.
7. The double-direction pressure-bearing wedge sealer according to claim 1, wherein: the Rong Xieguan (5) is a hollow cylinder with an outer diameter smaller than the outer diameter of the bottom end of the cone body (4), and the top end of the Rong Xieguan (5) is connected with the bottom of the cone body (4).
8. The double-direction pressure-bearing wedge sealer according to claim 1, wherein: the bottom end of Rong Xieguan (5) can be blocked or a one-way throttle valve can be installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310214919.XA CN115874970B (en) | 2023-03-08 | 2023-03-08 | Bidirectional pressure-bearing wedge sealer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310214919.XA CN115874970B (en) | 2023-03-08 | 2023-03-08 | Bidirectional pressure-bearing wedge sealer |
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| CN115874970A true CN115874970A (en) | 2023-03-31 |
| CN115874970B CN115874970B (en) | 2023-06-09 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4457369A (en) * | 1980-12-17 | 1984-07-03 | Otis Engineering Corporation | Packer for high temperature high pressure wells |
| CN104514512A (en) * | 2013-09-30 | 2015-04-15 | 扬州市油田金达实业有限公司 | Packer |
| CN105239956A (en) * | 2015-11-04 | 2016-01-13 | 天津市益彰石油科技发展有限公司 | Wedge type sealer |
| CN205370502U (en) * | 2015-12-31 | 2016-07-06 | 天津港锐石油工程科技有限公司 | Wedge -type seal ware |
| CN206972189U (en) * | 2017-04-26 | 2018-02-06 | 天津市益彰石油科技发展有限公司 | From profit run-resistant wedge-type sealer and its thread-off proof ring-shaped wedged seal |
| CN109882111A (en) * | 2019-04-11 | 2019-06-14 | 天津市益彰石油科技发展有限公司 | The logical profit wedge-type sealer of anti-sticking anticreep |
| CN209724285U (en) * | 2019-04-11 | 2019-12-03 | 天津市益彰石油科技发展有限公司 | The logical profit wedge-type sealer of anti-sticking anticreep |
| CN111726958A (en) * | 2020-07-29 | 2020-09-29 | 北京量子显示科技有限公司 | External member for sealing LED display module and assembling method |
-
2023
- 2023-03-08 CN CN202310214919.XA patent/CN115874970B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4457369A (en) * | 1980-12-17 | 1984-07-03 | Otis Engineering Corporation | Packer for high temperature high pressure wells |
| CN104514512A (en) * | 2013-09-30 | 2015-04-15 | 扬州市油田金达实业有限公司 | Packer |
| CN105239956A (en) * | 2015-11-04 | 2016-01-13 | 天津市益彰石油科技发展有限公司 | Wedge type sealer |
| CN205370502U (en) * | 2015-12-31 | 2016-07-06 | 天津港锐石油工程科技有限公司 | Wedge -type seal ware |
| CN206972189U (en) * | 2017-04-26 | 2018-02-06 | 天津市益彰石油科技发展有限公司 | From profit run-resistant wedge-type sealer and its thread-off proof ring-shaped wedged seal |
| CN109882111A (en) * | 2019-04-11 | 2019-06-14 | 天津市益彰石油科技发展有限公司 | The logical profit wedge-type sealer of anti-sticking anticreep |
| CN209724285U (en) * | 2019-04-11 | 2019-12-03 | 天津市益彰石油科技发展有限公司 | The logical profit wedge-type sealer of anti-sticking anticreep |
| CN111726958A (en) * | 2020-07-29 | 2020-09-29 | 北京量子显示科技有限公司 | External member for sealing LED display module and assembling method |
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|---|---|
| CN115874970B (en) | 2023-06-09 |
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