CN212428706U - Large-drift-diameter treatment-free underground high-pressure temporary plugging device - Google Patents
Large-drift-diameter treatment-free underground high-pressure temporary plugging device Download PDFInfo
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- CN212428706U CN212428706U CN202020341575.0U CN202020341575U CN212428706U CN 212428706 U CN212428706 U CN 212428706U CN 202020341575 U CN202020341575 U CN 202020341575U CN 212428706 U CN212428706 U CN 212428706U
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Abstract
The utility model belongs to the technical field of oil gas field is technical operation instrument in the pit, especially, relate to a big latus rectum exempts from to handle temporary stifled device of high pressure in the pit. The utility model discloses a releasing mechanism, card sealing mechanism, temporary blocking, supporting seat and mounting are combined organically and are formed. The utility model discloses a through type's releasing structure, it is simple reliable to make the whole size of instrument short and small, make full use of releasing structure size's change makes releasing load adjustable characteristic. The utility model is designed to bear the main load through the bottom support seat, thereby avoiding the stress on the central tube and leading the central tube to break through the limitation of material performance; the central pipe has a larger drift diameter with the pipe diameter being more than or equal to 50mm, and can be consistent with the inner diameter of a production oil pipe, so that later-stage liquid drainage and oil pipe passing operation can be smoothly carried out, and the construction safety is ensured. The utility model provides a cone, parachute-guard, retaining ring and packing element all adopt and can remove the material certainly, can remove failure by oneself after the construction, follow-up need not special treatment and can realize the full latus rectum of pit shaft.
Description
Technical Field
The utility model belongs to the technical field of oil gas field reservoir transformation, especially, relate to a temporary stifled device of big latus rectum free treatment downhole high pressure.
Background
In the development of oil and gas fields in the prior art, after the fracturing construction of a coiled tubing of an oil and gas well is completed, a production string is usually required to be matched with pressurized equipment to perform production. The operation technology degree of difficulty is big under pressure, and the construction risk is high, utilizes the equipment under pressure to cooperate the production string down, often causes other high risk wells etc. to stop, is unfavorable for the quick development of oil gas resource. At present, two underground temporary plugging schemes based on the traditional bridge plug form appear, one is a fishable bridge plug with temporary plugging arranged inside, a cable is sealed inside a shaft to temporarily plug underground high pressure, then a production pipe column is normally tripped in by adopting a normal pressure tripping process, and the bridge plug is taken out by tripping a fishing drill at the later stage; the other scheme is a fully soluble bridge plug with a temporary plug arranged inside, and the full drift diameter of the shaft can be realized without processing and dissolving completely in the later period. However, the salvaging type temporary plugging bridge plug has higher requirement on the reliability of the tool during operation, so that the construction risk is higher, the later salvaging difficulty is gradually increased along with the lengthening of the production time, and the subsequent shaft operation is not utilized; the full-soluble temporary plugging bridge plug can keep the full drift diameter of a shaft without special post treatment, but the inner diameter of a central pipe is often smaller due to the limitation of the performance of the existing soluble material and the limitation of the pressure bearing capacity, so that the subsequent construction is not facilitated, and the interference of different working condition factors on a large number of soluble parts is larger, so that the construction safety is influenced.
Therefore, aiming at the requirement of temporarily blocking underground high pressure to realize the production of a well head under normal pressure after the fracturing construction of the continuous oil pipe of the oil-gas well is finished at present, a downhole high-pressure temporary blocking tool which is reliable in structure, simple to operate, large in inner drift diameter and free of treatment in the later stage needs to be developed, so that the construction efficiency and the operation safety of oil-gas field transformation are improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a stifled device is temporarily exempted from to handle high pressure in pit by big latus rectum, aim at provide a structure reliable, easy operation, interior latus rectum big, the later stage exempt from to handle temporarily stifled device in pit to improve oil gas field transformation efficiency of construction and operation security.
In order to achieve the above object, the utility model adopts the following technical scheme:
a large-drift-diameter treatment-free underground high-pressure temporary plugging device comprises a releasing mechanism, a blocking mechanism, a temporary plug, a supporting seat and a fixing piece; the lower end of the releasing mechanism is detachably connected with the inner side wall of the temporary plug, and the outer side wall of the upper part of the releasing mechanism is contacted with the upper end face of the card sealing mechanism; the supporting seat is sleeved on the outer side wall of the lower end of the temporary plug and is fixed through a fixing piece; the card sealing mechanism is arranged on the periphery of the releasing mechanism, and the lower end of the card sealing mechanism is connected in a gap between the upper part of the supporting seat and the temporary plug and sealed with the temporary plug through a sealing piece.
The releasing mechanism comprises a releasing rod and a stress rod; the releasing rod and the stress rod are arranged up and down, and the outer side walls of the upper end and the lower end of the stress rod are respectively connected with the releasing rod and the inner side wall of the temporary plug through screw threads.
The hand throwing rod is a hollow cylindrical body consisting of an upper section of cylinder and a lower section of cylinder, the outer diameter of the upper end cylinder is larger than that of the lower section of cylinder, and the length of the upper end cylinder is smaller than that of the lower section of cylinder; the upper end surface of the card sealing mechanism is contacted with the joint of the upper section of the cylinder and the lower section of the cylinder of the hand throwing rod.
The stress rod is a cylindrical body with a ring-shaped groove in the middle for breaking.
The sealing and clamping mechanism comprises a movable sleeve, a slip, a cone, a second seat-prevention shear pin, an umbrella protector, a retaining ring, a rubber cylinder and a central pipe; the movable sleeve, the slips, the cone, the umbrella protector, the protective ring and the rubber cylinder are all sleeved outside the central pipe; the rubber cylinder is sleeved in the middle of the central pipe, and the retaining ring, the umbrella protector, the cone and the slips are sequentially and symmetrically arranged towards two sides by taking the rubber cylinder as a center; the cone is fixed with the central pipe through a second anti-seat shear pin; the movable sleeve is in contact with the slips at the upper part and is fixed with the central pipe through the first anti-seating shear pin; the upper end of the central tube is in contact with the releasing mechanism, and the lower end of the central tube is connected in a gap between the supporting seat and the temporary plug and is sealed with the temporary plug through a sealing ring.
The cone, the umbrella protector, the protective ring and the rubber cylinder are made of soluble materials.
The pipe diameter of the central pipe is larger than or equal to 50mm and is consistent with the inner diameter of the oil pipe for production.
The temporary plug is an integral structure formed by an upper section of columnar body and a lower section of columnar body with different outer diameters; the upper section of cylindrical body is a hollow cylindrical body, the outer diameter of the upper section of cylindrical body is smaller than that of the lower section of cylindrical body, and an inclined contact circular bead surface is arranged at the joint of the upper section of cylindrical body and the lower section of cylindrical body; the supporting seat is a hollow cylindrical body, and a boss matched with the contact circular bead surface is arranged in the middle of the inner side wall of the supporting seat.
The fixing piece adopts a starting shear pin.
Has the advantages that:
(1) the utility model discloses a releasing mechanism, card sealing mechanism, temporary blocking, supporting seat and mounting are combined organically and are formed. The lower end of the releasing mechanism is connected with the inner side wall of the temporary plug, the supporting seat is sleeved on the outer side wall of the lower end of the temporary plug and is fixed through a fixing piece, and a gap is formed between the upper part of the supporting seat and the temporary plug; the card sealing mechanism is sleeved on the periphery of the releasing mechanism, the upper end of the card sealing mechanism is in contact with the releasing mechanism, and the lower end of the card sealing mechanism is connected in a gap between the upper part of the supporting seat and the temporary plug and sealed with the temporary plug. The utility model discloses used simple instrument structure, realized the reliable temporary stifled of pit shaft high pressure.
(2) The utility model discloses the technical scheme of stress stick is adopted to the structure of giving up for the load of giving up is adjustable.
(3) The utility model discloses a center tube latus rectum is great, makes later stage flowing back and crosses the smooth and easy going on of oil pipe operation, has guaranteed the safety of construction.
(4) The utility model discloses a cone, parachute-guard, retaining ring and packing element adopt be soluble material, and the instrument dissolves inefficacy by oneself after the construction, and follow-up need not special treatment and can realize the full latus rectum of pit shaft.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some 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 structural diagram of the present invention;
FIG. 2 is a schematic view of the initial state of the present invention during operation;
FIG. 3 is a schematic view of the plugging state of the present invention during operation;
FIG. 4 is a schematic view of the pump in an open state during operation of the present invention;
FIG. 5 is a schematic view of the self-release state of the present invention during operation;
fig. 6 is a schematic sectional view of the stress bar of the present invention.
In the figure: 1-throwing a handle; 2-a movable sleeve; 3-first anti-seating shear pins; 4-slips; 5-a cone; 6-second anti-seating shear pins; 7-umbrella protection; 8-protecting the ring; 9-a rubber cylinder; 10-a central tube; 11-stress bar; 12-a sealing ring; 13-temporary plugging; 14-a support base; 15-starting the shear pin; 16-a cannula; 17-setting tool push cylinder; 18-setting the tool joint; 19-annular groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
the large-drift-diameter treatment-free underground high-pressure temporary plugging device comprises a releasing mechanism, a blocking mechanism, a temporary plug 13, a supporting seat 14 and a fixing piece, wherein the releasing mechanism is arranged on the releasing mechanism; the lower end of the releasing mechanism is detachably connected with the inner side wall of the temporary plug 13, and the outer side wall of the upper part of the releasing mechanism is contacted with the upper end face of the card sealing mechanism; the supporting seat 14 is sleeved on the outer side wall of the lower end of the temporary plug 13 and is fixed through a fixing piece; the card sealing mechanism is arranged on the periphery of the releasing mechanism, and the lower end of the card sealing mechanism is connected in a gap between the upper part of the supporting seat 14 and the temporary plug 13 and sealed with the temporary plug 13 through a sealing piece.
Preferably the fastener is a trigger pin 15.
When the underground high-pressure temporary plugging tool is actually used, the upper end of the large-drift-diameter treatment-free underground high-pressure temporary plugging tool is connected with a base sealing tool joint screw thread in the prior art, a push cylinder arranged on the base sealing tool is installed in place and then is contacted with a sealing and clamping mechanism, and the upper end of the base sealing tool is connected with a cable to a wellhead; the blocking mechanism moves downwards under the thrust action of a blocking tool to complete contact and clamping with the inner side wall of the sleeve 16, and the sealing is extruded, and a part of the upper part of the releasing mechanism is released after a preset load is reached. The temporary plug 13 is matched with the blocking mechanism to realize sealing, and at the moment, the whole tool is in a shaft blocking working state. After the shaft operation is finished, the oil-gas well is provided with a wellhead facility, a pump truck is connected to pump pressure into the shaft, after the design pressure is reached, the temporary plug 13 is forced by a downward piston to cut off a fixing piece, namely, a shear pin 15 is started, and the temporary plug 13 falls into the bottom of the well, so that the oil-gas well normally drains liquid and is put into production.
The temporary plug 13 is installed together with the supporting seat 14 through the starting shear pin 15, is limited upwards, and can be opened by shearing the starting shear pin 15 downwards. The fixing piece adopts a starting shear pin 15, so that the replacement is quick and convenient, and the pump-on load of the temporary plug 13 can be controlled by adjusting the quantity and the size.
The utility model discloses a simple structure instrument has realized that the pit shaft high pressure is reliable temporarily stifled. The utility model discloses a center tube latus rectum is not less than 50mm, makes later stage flowing back and crosses the smooth and easy going on of oil pipe operation, has guaranteed the safety of construction.
Example two:
the large-drift-diameter treatment-free downhole high-pressure temporary plugging device shown in fig. 1-3 and 6 is different from the first embodiment in that: the releasing mechanism comprises a releasing rod 1 and a stress rod 11; releasing rod 1 and stress rod 11 set up from top to bottom, stress rod 11 upper and lower both ends lateral wall respectively with releasing rod 1 and temporary jam 13 inside wall screw thread connection.
Furthermore, the stress rod 11 is a cylindrical body with an annular groove 19 for breaking at the middle part.
In practical use, when the blocking mechanism moves downwards under the thrust action of the blocking tool to complete contact and clamping with the inner side wall of the sleeve 16 and squeeze and seal, and after a preset load is reached, the throwing rod 1 breaks a weak point arranged in the middle of the stress rod 11, namely the annular groove 19, and the tool is completely released.
In a specific application, the stress rod 11 adopts the prior art, and the stress rod 11 can be used for adjusting the releasing load through the set size of the stress rod 11.
The utility model discloses a this technical scheme for the instrument is not only connected conveniently, and intensity satisfies the requirement moreover. By adopting the technical scheme that the releasing structure is provided with the stress rod, the releasing load is adjustable.
Adopt the technical scheme of the utility model, make full use of the change of giving up the structural dimension makes the characteristic of giving up load adjustable to make the whole size of instrument short and small, make full use of the change of giving up the structural dimension makes the characteristic of giving up load adjustable.
Example three:
the large-drift-diameter treatment-free downhole high-pressure temporary plugging device shown in fig. 1-5 is different from the first embodiment in that: the blocking mechanism comprises a movable sleeve 2, a slip 4, a cone 5, a second anti-seat shear pin 6, an umbrella protector 7, a protective ring 8, a rubber cylinder 9 and a central pipe 10; the movable sleeve 2, the slips 4, the cone 5, the umbrella protector 7, the protective ring 8 and the rubber cylinder 9 are all sleeved outside the central tube 10; the rubber cylinder 9 is sleeved in the middle of the central tube 10, and the retaining ring 8, the umbrella 7, the cone 5 and the slips 4 are sequentially and symmetrically arranged towards two sides by taking the rubber cylinder 9 as the center; the cone 5 is fixed with a central tube 10 through a second anti-seating shear pin 6; the movable sleeve 2 is in contact with a slip 4 positioned at the upper part and is fixed with the central pipe 10 through a first anti-seating shear pin 3; the upper end of the central tube 10 is contacted with the releasing mechanism, and the lower end of the central tube 10 is connected in a gap between the upper part of the supporting seat 14 and the temporary plug 13 and sealed with the temporary plug 13.
In practical use, when the large-drift diameter treatment-free underground high-pressure temporary plugging tool is lowered to a designed depth, the movable sleeve 2 moves downwards under the thrust action of the seat sealing tool, slips 4 symmetrically arranged by taking the rubber sleeve 9 as a center are pushed and expanded, the slips 4 and the cone 5 slide relatively and clamp the inner side wall of the sleeve 16, the umbrella protector 7 is pushed by the cone 5 to expand an annular gap between the filling tool and the sleeve, the compressed rubber sleeve 9 is further compacted together with the protective ring 8, finally the rubber sleeve 9 is in close contact with the inner side wall of the sleeve 16 and the central tube 10 to form reliable extrusion sealing, after a preset load is reached, the releasing mechanism is pulled off at a weak point, the tool is completely released, a channel inside the central tube 10 is tightly matched with the central tube 10 through the temporary plug 13 to realize sealing, and at the moment, the whole tool is in a shaft plugging working state.
The technical scheme of the utility model, center tube 10 latus rectum is great, makes later stage flowing back and crosses the smooth and easy going on of oil pipe operation, has guaranteed the safety of construction.
Example four:
according to the large drift diameter treatment-free downhole high-pressure temporary plugging device shown in fig. 1 and 5, the difference from the first embodiment is that: a sealing ring 12 is arranged between the central tube 10 and the releasing mechanism.
In practical use, the arrangement of the sealing ring 12 enables the temporary plug 13 to have a better sealing effect with the central tube 10, and the cost is lower.
Example five:
the large-drift-diameter treatment-free downhole high-pressure temporary plugging device shown in fig. 1, 3 and 4 is different from the first embodiment in that: the cone 5, the umbrella 7, the protective ring 8 and the rubber cylinder 9 are made of soluble materials.
Preferably, the pipe diameter of the central pipe 10 is more than or equal to 50mm and is consistent with the inner diameter of the oil pipe for production.
In practical use, the cone 5, the umbrella 7, the retaining ring 8 and the rubber sleeve 9 are made of soluble metal, the soluble parts of the cone 5, the umbrella 7, the retaining ring 8 and the rubber sleeve 9 are gradually dissolved and lose efficacy in a period of normal liquid drainage and production of an oil-gas well, finally, the residual part of the tool automatically falls into the bottom of the well, and the full drift diameter of the shaft can be realized without special treatment in the subsequent design.
The central tube 10 has a larger drift diameter with the tube diameter being more than or equal to 50mm, and the drift diameter is consistent with the inner diameter of the production oil tube, so that later-stage liquid drainage and oil tube passing operation are smoothly carried out, and the construction safety is ensured.
The soluble material in this embodiment is the prior art.
Example six:
the large-drift-diameter treatment-free downhole high-pressure temporary plugging device shown in fig. 1, 4 and 5 is different from the first embodiment in that: the temporary plug 13 is an integral structure formed by an upper section of columnar body and a lower section of columnar body with different outer diameters; the upper section of cylindrical body is a hollow cylindrical body, the outer diameter of the upper section of cylindrical body is smaller than that of the lower section of cylindrical body, and an inclined contact circular bead surface is arranged at the joint of the upper section of cylindrical body and the lower section of cylindrical body; the supporting seat 14 is a hollow cylindrical body, and a boss matched with the contact shoulder surface is arranged in the middle of the inner side wall of the supporting seat 14.
During the in-service use, supporting seat 14 and temporary jam 13 adopt this technical scheme for the releasing load that releasing mechanism transmitted for temporary jam 13 all acts on supporting seat 14, has avoided the center tube 10 atress of card sealing mechanism, thereby has broken through the restriction of material performance.
Example seven:
a temporary plugging method of a large-drift-diameter treatment-free underground high-pressure temporary plugging device comprises the following steps
The method comprises the following steps: the upper end of a lost handle rod 1 of the large-drift-diameter treatment-free underground high-pressure temporary plugging tool is connected with a base sealing tool joint through a screw thread, a push cylinder arranged on the base sealing tool is installed in place and then is contacted with the upper end face of a movable sleeve 2, and the upper end of the base sealing tool is connected with a cable to a wellhead;
step two: the movable sleeve 2 moves downwards under the thrust action of a seat sealing tool, slips 4 symmetrically arranged by taking a rubber sleeve 9 as a center are pushed and opened, the slips 4 and a cone 5 slide relatively and are opened to clamp the inner side wall of a sleeve 16, meanwhile, an umbrella protector 7 is pushed by the cone 5 to open and fill an annular gap between the tool and the sleeve 16, the compressed rubber sleeve 9 is further compacted together with a retaining ring 8, the rubber sleeve 9 is tightly contacted with the inner side wall of the sleeve 16 and a central tube 10 to form extrudable seal, after a preset load is reached, a hand rod 1 is thrown to break an annular groove 19 in the middle of a stress rod 11, the tool is completely released, and a channel in the central tube 10 is sealed by matching of a temporary plug 13 and a sealing ring 12;
step three: after the shaft operation is finished, installing a wellhead facility in the oil-gas well, connecting a pump truck to pump pressure into the shaft, shearing a starting shear pin 15 by the downward piston force of a temporary plug 13 after the design pressure is reached, and enabling the temporary plug 13 to fall into the bottom of the well, so that the oil-gas well normally drains liquid and puts into production;
step four: after normal liquid discharge and delivery of the oil-gas well, the cone 5, the protective umbrella 7, the protective ring 8 and the rubber cylinder 9 are gradually dissolved and lose efficacy, and finally the residual part of the tool automatically falls into the well bottom.
The utility model provides a technical problem that the high pressure realized well head ordinary pressure downhole drilling under slim hole pit shaft temporarily blocks up, through a reliable structure, easy operation's the temporary stifled instrument of high pressure in the processing well is exempted from in the big latus rectum, the production string has been realized normally going into to the well head behind the inside high pressure of temporary stifled well section of thick bamboo, suppress in the pit shaft and press and beat the inside temporary blocking 13 of temporary stifled ware, but flowing back gas production passageway of UNICOM, final instrument dissolves by oneself in the pit shaft environment, need not follow-up processing and can realize the full latus rectum of pit shaft, the operation security and the efficiency of construction that oil gas well flowing back gas production was put into production have been improved.
To sum up, the utility model discloses a releasing mechanism, card mechanism, temporary plugging up, supporting seat and mounting are combined organically and are formed. The lower end of the releasing mechanism is connected with the inner side wall of the temporary plug, the supporting seat is sleeved on the outer side wall of the lower end of the temporary plug and is fixed through a fixing piece, and a gap is formed between the upper part of the supporting seat and the temporary plug; the card sealing mechanism is sleeved on the periphery of the releasing mechanism, the upper end of the card sealing mechanism is in contact with the releasing mechanism, and the lower end of the card sealing mechanism is connected in a gap between the upper part of the supporting seat and the temporary plug and sealed with the temporary plug. The utility model discloses used simple instrument structure, realized the reliable temporary stifled of pit shaft high pressure.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a stifled device is temporarily stopped up to big latus rectum exemption from to handle underground high pressure which characterized in that: comprises a releasing mechanism, a card sealing mechanism, a temporary plug (13), a supporting seat (14) and a fixing piece; the lower end of the releasing mechanism is detachably connected with the inner side wall of the temporary plug (13), and the outer side wall of the upper part of the releasing mechanism is contacted with the upper end face of the card sealing mechanism; the supporting seat (14) is sleeved on the outer side wall of the lower end of the temporary plug (13) and is fixed through a fixing piece; the card sealing mechanism is arranged on the periphery of the releasing mechanism, and the lower end of the card sealing mechanism is connected in a gap between the upper part of the supporting seat (14) and the temporary plug (13) and sealed with the temporary plug (13) through a sealing piece.
2. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 1, wherein: the releasing mechanism comprises a releasing rod (1) and a stress rod (11); the hand throwing rod (1) and the stress rod (11) are arranged up and down, and the outer side walls of the upper end and the lower end of the stress rod (11) are respectively in threaded connection with the inner side walls of the hand throwing rod (1) and the temporary plug (13).
3. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 2, wherein: the hand throwing rod (1) is a hollow cylindrical body consisting of an upper section of cylinder and a lower section of cylinder, the outer diameter of the upper end cylinder is larger than that of the lower section of cylinder, and the length of the upper end cylinder is smaller than that of the lower section of cylinder; the upper end surface of the card sealing mechanism is contacted with the joint of the upper section of cylinder and the lower section of cylinder of the hand throwing rod (1).
4. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 2, wherein: the stress rod (11) is a cylindrical body with a ring-shaped groove (19) for breaking at the middle part.
5. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 1, wherein: the blocking mechanism comprises a movable sleeve (2), a slip (4), a cone (5), a second anti-seat shear pin (6), a protective umbrella (7), a protective ring (8), a rubber cylinder (9) and a central tube (10); the movable sleeve (2), the slips (4), the cone (5), the umbrella protector (7), the protective ring (8) and the rubber cylinder (9) are all sleeved outside the central tube (10); the rubber cylinder (9) is sleeved in the middle of the central tube (10), and the retaining ring (8), the umbrella protector (7), the cone (5) and the slips (4) are sequentially and symmetrically arranged towards two sides by taking the rubber cylinder (9) as a center; the cone (5) is fixed with the central tube (10) through a second anti-seating shear pin (6); the movable sleeve (2) is in contact with a slip (4) positioned at the upper part and is fixed with the central pipe (10) through a first anti-seat shear pin (3); the upper end of the central tube (10) is in contact with the releasing mechanism, and the lower end of the central tube (10) is connected in a gap between the supporting seat (14) and the temporary plug (13) and sealed with the temporary plug (13) through a sealing ring (12).
6. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 5, wherein: the cone (5), the umbrella protector (7), the protective ring (8) and the rubber cylinder (9) are made of soluble materials.
7. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 5, wherein: the pipe diameter of the central pipe (10) is larger than or equal to 50mm and is consistent with the inner diameter of the oil pipe for production.
8. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 1, wherein: the temporary plug (13) is an integrated structure consisting of an upper section of columnar body and a lower section of columnar body with different outer diameters; the upper section of cylindrical body is a hollow cylindrical body, the outer diameter of the upper section of cylindrical body is smaller than that of the lower section of cylindrical body, and an inclined contact circular bead surface is arranged at the joint of the upper section of cylindrical body and the lower section of cylindrical body; the supporting seat (14) is a hollow cylindrical body, and a boss matched with the contact shoulder surface is arranged in the middle of the inner side wall of the supporting seat (14).
9. The large-drift-diameter treatment-free downhole high-pressure temporary plugging device according to claim 1, wherein: the fixing piece adopts a starting shear pin (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020341575.0U CN212428706U (en) | 2020-03-18 | 2020-03-18 | Large-drift-diameter treatment-free underground high-pressure temporary plugging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020341575.0U CN212428706U (en) | 2020-03-18 | 2020-03-18 | Large-drift-diameter treatment-free underground high-pressure temporary plugging device |
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| CN212428706U true CN212428706U (en) | 2021-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236881A (en) * | 2020-03-18 | 2020-06-05 | 中国石油天然气集团有限公司 | Large-drift-diameter treatment-free underground high-pressure temporary plugging device and method |
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2020
- 2020-03-18 CN CN202020341575.0U patent/CN212428706U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236881A (en) * | 2020-03-18 | 2020-06-05 | 中国石油天然气集团有限公司 | Large-drift-diameter treatment-free underground high-pressure temporary plugging device and method |
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