CN208950528U - Bridge plug - Google Patents
Bridge plug Download PDFInfo
- Publication number
- CN208950528U CN208950528U CN201821227898.6U CN201821227898U CN208950528U CN 208950528 U CN208950528 U CN 208950528U CN 201821227898 U CN201821227898 U CN 201821227898U CN 208950528 U CN208950528 U CN 208950528U
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- China
- Prior art keywords
- brambles
- packing element
- central tube
- bridge plug
- centrum
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- 238000007873 sieving Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a bridge plug belongs to unconventional oil and gas resource reservoir transformation technical field. The bridge plug comprises a central pipe and components such as an upper joint, a main rubber cylinder, a cone, a slip and a lower joint which are arranged outside the central pipe in a sleeved mode, has the characteristic of a small-diameter large channel, can be conveyed to a target layer through a sleeve deformation section, and is put into a soluble fracturing ball with a corresponding size to realize a temporary plugging function. Because the outer diameter of the tool is smaller, the tool can smoothly change into small sections through a shaft channel, and complete releasing, seat sealing and fracturing construction operations, thereby solving the problem of running-in caused by the reduction of a sleeve channel; and simultaneously, the utility model discloses the internal diameter is great, treats that soluble fracturing ball can realize directly returning after dissolving and put into production fast, has possessed the function that current conventional big latus rectum bridging plug possessed, has shortened construction operation cycle, has practiced thrift a large amount of time cost and human cost.
Description
Technical field
The utility model relates to unconventional petroleum resources stimulation technology field, in particular to a kind of bridge plug.
Background technique
Bridge plug is used for oil/gas well sealing, in oil/gas well formation testing by layer, separate stratum fracfturing acidification, selective sand control, seperated layer water injection, divides
The fields such as layer production and closing water layer, closing dried layer and closing waste layer are widely used.
In oil/gas well stratified operation, usually used bridge plug is big orifice bridge plug.However, practice of construction process at the scene
In, there is pit shaft latus rectum and becomes smaller in part well, big orifice bridge plug outer diameter it is larger cannot smoothly tripping in etc., largely effect on operation
Go on smoothly and implementation result.
Utility model content
The utility model embodiment provides bridge plug a kind of, can solve the above problems.
Specifically, including technical solution below:
A kind of bridge plug is provided, which includes:
Central tube and be sequentially sleeved at the outside of central tube and mutually abut top connection, main packing element, centrum, slips, under
Connector；Wherein, the upper end of the slips is connected on the conical surface of the centrum；The top connection is fixedly connected in described
The outside of heart pipe；
The bridge plug further include:
The first brambles pipe between the lower contact and the central tube is set, and the first brambles pipe is fixed on described
The outside of central tube, and the lower contact can be moved upwards along the first brambles pipe, and be fixed on the first brambles pipe；
The first shear pin being connected between the lower contact and the central tube；
The second brambles pipe between the centrum and the central tube is set, and the second brambles pipe is fixed in described
The outside of heart pipe, and the centrum can move upwards along the second brambles pipe, and be fixed on the second brambles pipe；
The second shear pin being connected between the centrum and the central tube.
In a kind of possible design, the internal channel diameter of the bridge plug is not less than 50mm, the outer dia of the bridge plug
No more than 93mm.
In a kind of possible design, the main packing element is internally provided with expansion slot；
The expansion slot is located at the middle part of the main packing element.
In a kind of possible design, the first brambles external tooth is provided in the outer pipe wall of the first brambles pipe, it is internal
The first brambles internal tooth is provided on tube wall；
The outside of the central tube is provided with central tube brambles external tooth, the central tube brambles external tooth and first brambles
Internal tooth is locking；
The lower contact is internally provided with lower contact brambles internal tooth, and the lower contact brambles internal tooth can be along first chaste tree
Spine external tooth moves upwards, and is fixed on the first brambles external tooth.
In a kind of possible design, the second brambles external tooth is provided in the outer pipe wall of the second brambles pipe, it is internal
The second brambles internal tooth is provided on tube wall；
The outside of the central tube is provided with central tube brambles external tooth, the central tube brambles external tooth and second brambles
Internal tooth is locking；
The centrum is internally provided with centrum brambles internal tooth, and the centrum brambles internal tooth can be along the second brambles external tooth
It moves upwards, and is fixed on the second brambles external tooth.
In a kind of possible design, the bridge plug further include:
It is set in the first secondary packing element and the second secondary packing element of the outside of the central tube；
Described first secondary packing element is set between the top connection and the main packing element；
Described second secondary packing element is set between the main packing element and the centrum.
In a kind of possible design, there is the abutting being bonded to each other between the described first secondary packing element and the main packing element
Face；
There is the bearing surface being bonded to each other between described second secondary packing element and the main packing element.
In a kind of possible design, the bridge plug further include: be set in the outside of the central tube the first retaining ring and
Second retaining ring；
First retaining ring is set between the top connection and the first secondary packing element；
Second retaining ring is set between the described second secondary packing element and the centrum.
In a kind of possible design, there is the abutting being bonded to each other between first retaining ring and the first secondary packing element
Face；
There is the bearing surface being bonded to each other between second retaining ring and the second secondary packing element.
Technical solution bring beneficial effect provided by the embodiment of the utility model includes at least:
Bridge plug provided by the embodiment of the utility model has the characteristics that " the big channel of minor diameter ", can pass through casing deformation section
It send to target zone, the soluble pressure break ball for putting into corresponding size realizes temporary plugging function.Since the utility model tool external diameter is smaller,
Shaft way can be passed through to become smaller section, completion gives up, setting and pressing crack construction operation, solves sleeve channel and becomes smaller and brings
Tripping in problem；Meanwhile the utility model internal diameter is larger, and the directly row of returning can be achieved after the dissolution of soluble pressure break ball and quickly throw
It produces, has the function that existing conventional big orifice bridge plug has, shorten the construction operation period, saved a large amount of time cost
And human cost.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of bridge plug provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of central tube provided by the embodiment of the utility model；
Fig. 3 is the structural schematic diagram of main packing element provided by the embodiment of the utility model；
Fig. 4 is the structural schematic diagram of the first brambles pipe provided by the embodiment of the utility model；
Fig. 5 is the structural schematic diagram of lower contact provided by the embodiment of the utility model；
Fig. 6 is the structural schematic diagram of the second brambles pipe provided by the embodiment of the utility model；
Fig. 7 is the structural schematic diagram of centrum provided by the embodiment of the utility model.
Appended drawing reference in figure respectively indicates:
1- top connection；
The first retaining ring of 2-；
The secondary packing element of 3- first；
The main packing element of 4-；401- expansion slot；
The secondary packing element of 5- second；
The second retaining ring of 6-；
7- centrum；701- centrum brambles internal tooth；702- centrum shear pin nail hole；The 703- centrum conical surface；
8- slips；
9- lower contact；901- lower contact brambles internal tooth；902- lower contact shear pin nail hole；The 903- lower contact conical surface；
The first shear pin of 10-；
11- the first brambles pipe；1101- the first brambles external tooth；1102- the first brambles internal tooth；
The second shear pin of 12-；
13- the second brambles pipe；1301- the second brambles external tooth；1302- the second brambles internal tooth；
14- central tube；1401- central tube brambles external tooth；1402- the second shear pin nail hole；The center 1403- tube seat；1404-
First shear pin nail hole.
Specific embodiment
To keep the technical solution of the utility model and advantage clearer, the utility model is implemented below in conjunction with attached drawing
Mode is described in further detail.
In the description of the present invention, it should be noted that the orientation of the instructions such as term " on ", "lower", "inner", "outside"
Or positional relationship be based on the utility model product using when the orientation or positional relationship usually put, be merely for convenience of describing
The utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " etc.
It is only used for distinguishing description, is not understood to indicate or imply relative importance or implicitly indicates indicated technical characteristic
Quantity.
The utility model embodiment provides a kind of bridge plug, as shown in Figure 1, the bridge plug includes:
Central tube 14 and be sequentially sleeved at the outside of central tube 14 and mutually abut top connection 1, main packing element 4, centrum 7,
Slips 8, lower contact 9；Wherein, the upper end of slips 8 is connected on the conical surface of centrum 7；Top connection 1 is fixedly connected on central tube 14
It is external；
The bridge plug further include:
The first brambles pipe 11 between lower contact 9 and central tube 14 is set, and the first brambles pipe 11 is fixed on central tube 14
Outside, and lower contact 9 can be moved upwards along the first brambles pipe 11, and be fixed on the first brambles pipe 11；
The first shear pin 10 being connected between lower contact 9 and central tube 14；
The second brambles pipe 13 between centrum 7 and central tube 14 is set, and the second brambles pipe 13 is fixed on central tube 14
Outside, and centrum 7 can move upwards along the second brambles pipe 13, and be fixed on the second brambles pipe 13；
The second shear pin 12 being connected between centrum 7 and central tube 14.
In application, by setting tool, adapter, set cylinder, bridge plug is sequentially connected, wherein adapter pass through give up bar company
Central tube 14 is connect, using cable or coiled tubing by above-mentioned tool string, the predetermined level being fed through in casing, by transmitting signal
Or the movement of hydraulic-driven setting tool, inside center bar is above mentioned, so that the first shear pin 10, the second shear pin 12 are successively cut
Disconnected, so that lower contact 9, slips 8, centrum 7, main packing element 4 be pulled to move upwards, slips 8 is under compressive forces along centrum 7
The radial motion of conical surface direction is contacted with the inner wall of casing；Main packing element 4 is then radially expanded under compressive forces, with casing
Inner wall fits closely.When setting tool thrust reaches certain value, completion is given up (bar off center pipe 14 of giving up), and centrum 7 is logical
It crosses between the second brambles pipe 13 and central tube 14 and realizes locking, lower contact 9 passes through real between the first brambles pipe 11 and central tube 14
It is existing locking, it prevents main packing element 4 and slips 8 from springing back, keeps sealing and the anchoring effect of tool；Then, corresponding ruler is put into well head
Very little dissolvable pressure break ball, by well pumping liquid dissolvable pressure break ball sent to 1 upper end opening of top connection, reach envelope
The purpose of stifled target zone lower end.After the completion of Contraction in Site, dissolvable pressure break ball is dissolved, can be gone into operation.
Bridge plug provided by the embodiment of the utility model can have the spy in " the big channel of minor diameter " by above-mentioned tectonic sieving
Point, and then can be given by casing deformation section to target zone, the soluble pressure break ball for putting into corresponding size realizes temporary plugging function.Due to
The utility model tool external diameter is smaller, can pass through shaft way and become smaller section, and completion is given up, setting and pressing crack construction is made
Industry solves sleeve channel and becomes smaller bring tripping in problem；Meanwhile the utility model internal diameter is larger, it is molten to soluble pressure break ball
The directly row of returning can be achieved after solution and quickly go into operation, have the function that existing conventional big orifice bridge plug has, shorten construction and make
The industry period has saved a large amount of time cost and human cost.
In a kind of possible design, the stress levels of the bridge plug can be not less than 50MPa, and 120-150 DEG C of temperature resistant grade, bridge
The outer dia of plug can be not more than 93mm, smooth tripping in and packing can be achieved after shaft way becomes smaller, and internal channel diameter can
It is preferable to meet the practical pressure break demand in scene not less than 50mm, it can be achieved that quickly the row of returning goes into operation after storey increase design.
As shown in Fig. 2, the inside of central tube 14 is hollow structure, diameter is not less than 50mm.Outside the upper end of central tube 14
Screw thread is provided on wall, for being fixedly connected with top connection 1.The upper end of central tube 14 is also provided with ball seat, solvable for accommodating
Blastomere is decompressed, realizes and blocks.
It, can also be in the lower end setting center tube seat 1403 of central tube 14 for the ease of bar clamping central tube 14 of giving up.
In application, bar of giving up first is stuck on center tube seat 1403, and after completion is given up, off center tube seat 1403.
Further, the quantity of center tube seat 1403 can be 4, and the tube wall along central tube 14 is in 90 ° of distributions.
Further, the first shear pin nail hole 1404 and the second shear pin are additionally provided on the lower end tube wall of central tube 14
Hole 1402.
In application, the first shear pin nail hole 1404 is corresponding with lower contact shear pin nail hole 902 (as shown in Figure 5), for pacifying
Fill the first shear pin 10；Second shear pin nail hole 1402 is corresponding with centrum shear pin nail hole 702 (as shown in Figure 7), for pacifying
Fill the second shear pin 12.Wherein, the quantity of the first shear pin nail hole 1404 can be 4, and the tube wall along central tube 14 is in 90 ° points
Cloth；The quantity of second shear pin nail hole 1402 can be 2, and the tube wall along central tube 14 is in 180 ° of distributions.
In above-mentioned bridge plug, main packing element 4 is set on central tube 14, and main packing element 4 is under compressive forces along diameter
To expansion, to be fitted closely with internal surface of sleeve pipe.
In order to be conducive to main 4 compression-expansion of packing element, as shown in figure 3, can make main packing element 4 is internally provided with expansion slot 401.
Illustratively, expansion slot 401 can be located at the middle part of main packing element 4.
In application, can be preferentially radially expanded at expansion slot 401 when main packing element 4 is by compressing force, so set,
It can be conducive to fitting closely between main packing element 4 and internal surface of sleeve pipe.
Further, in order to be deformed main packing element 4 uniformly and stably after by compressing force, as shown in Figure 1, can make
Bridge plug further include:
It is set in the first secondary packing element 3 and the second secondary packing element 5 of the outside of central tube 14；
First secondary packing element 3 is set between top connection 1 and main packing element 4；
Second secondary packing element 5 is set between main packing element 4 and centrum 7.
In application, compressing force acts on the both ends of main packing element 4 through the first secondary packing element 5 of secondary packing element 3, second respectively, compress
Power is scattered between the first secondary packing element 3, main packing element 4 and the second secondary packing element 5, so that winner's packing element 4 is generated and is stablized deformation.
In addition, can also make the first pair to preferably make main packing element 4 radially dilatancy after by compressing force
There is the bearing surface being bonded to each other between packing element 3 and main packing element 4；
There is the bearing surface being bonded to each other between second secondary packing element 5 and main packing element 4.
Illustratively, as shown in Figure 1, can make that there is the inclined-plane being bonded to each other between the first secondary packing element 3 and main packing element 4, second
There is the inclined-plane that is bonded to each other, and two inclined-planes are towards the direction of main 4 radial deformation of packing element between secondary packing element 5 and main packing element 4.So
Setting can make the first secondary packing element 3 and the second secondary main packing element 4 of 5 pairs of packing element play the role of righting.
Further, it in order to protect packing element, avoids squeezing under compressive forces impaired, can also make the bridge plug include:
It is set in the first retaining ring 2 and the second retaining ring 6 of the outside of central tube 14；
First retaining ring 2 is set between top connection 1 and the first secondary packing element 3；
Second retaining ring 6 is set between the second secondary packing element 5 and centrum 7.
First retaining ring 2 can be used for protecting the first secondary packing element 3, avoid being damaged because of the extruding of top connection 1, the second retaining ring 6 can
For protecting the second secondary packing element 5, avoid being damaged because of the extruding of centrum 7.
Correspondingly, it can also make that there is the bearing surface being bonded to each other between the first retaining ring 2 and the first secondary packing element 3；
There is the bearing surface being bonded to each other between second retaining ring 6 and the second secondary packing element 5.
Illustratively, as shown in Figure 1, can make that there is the inclined-plane being bonded to each other between the first retaining ring 2 and the first secondary packing element 3, the
There is the inclined-plane being bonded to each other, and two inclined-planes are towards the direction of 4 radial deformation of packing element between two retaining rings 6 and the second secondary packing element 5.Such as
This setting, can make the first retaining ring 2 and the second retaining ring 6 play guiding role to the deformation of packing element.
In above-mentioned bridge plug, the first brambles pipe 11 is fixedly connected on central tube 14, used in lower contact 9 to be fixed on
On heart pipe 14, while making lower contact 9 by upward compressing force, can be moved upwards along the first brambles pipe 11；Second
Brambles pipe 13 is fixed on central tube 14, for centrum 7 to be fixed on central tube 14, while is pressing centrum 7 upwards
In the case where contracting power, it can be moved upwards along the second brambles pipe 13.
In view of the convenience that the first brambles pipe 11 uses, as shown in figure 4, can make in the outer pipe wall of the first brambles pipe 11
It is provided with the first brambles external tooth 1101, the first brambles internal tooth 1102 is provided in inner pipe wall；
And as shown in Fig. 2, the outside of central tube 14 is provided with central tube brambles external tooth 1401, central tube brambles external tooth 1401
It is locking with the first brambles internal tooth 1102；
As shown in figure 5, lower contact 9 is internally provided with lower contact brambles internal tooth 901, lower contact brambles internal tooth 901 can edge
First brambles external tooth 1101 moves upwards, and is fixed on the first brambles external tooth 1101.
In application, lower contact 9 is under compressive forces, so that lower contact brambles internal tooth 901 is along the first brambles external tooth
1101 move upwards, and after completing to give up, are engaging in lower contact brambles internal tooth 901 on first brambles external tooth 1101, realize
It is locking between lower contact 9 and central tube 14.
Further, as shown in figure 5, being also correspondingly arranged on lower contact shear pin nail hole 902 in lower contact 9, and under connect
The corresponding first shear pin nail hole 1404 of the quantity of head shear pin nail hole 902 and position is configured, in order to the first shear pin
10 installation.
Illustratively, the quantity of lower contact shear pin nail hole 902 can be 4, and along the outer wall of lower contact 9 in 90 ° of distributions.
In addition, as shown in figure 5, be additionally provided with the lower contact conical surface 903 in lower contact 9, the conical surface can be conducive to bridge plug it is smooth under
Enter in well.
Similarly, as shown in fig. 6, can make to be provided with the second brambles external tooth 1301 in the outer pipe wall of the second brambles pipe 13,
The second brambles internal tooth 1302 is provided in inner pipe wall；
And as shown in Fig. 2, the outside of central tube 14 is provided with central tube brambles external tooth 1401, central tube brambles external tooth 1401
It is locking with the second brambles internal tooth 1302；
As shown in fig. 7, centrum 7 is internally provided with centrum brambles internal tooth 701, centrum brambles internal tooth 701 can be along the second chaste tree
Spine external tooth 1301 moves upwards, and is fixed on the second brambles external tooth 1301.
In application, centrum 7 is under compressive forces so that centrum brambles internal tooth 701 along the second brambles external tooth 1301 to
Upper movement, and after completing to give up, so that centrum brambles internal tooth 701 is engaging in the second brambles external tooth 1301, realizes centrum 7 and center
It is locking between pipe 14.
Further, as shown in fig. 7, being also correspondingly arranged on centrum shear pin nail hole 702 on centrum 7, and centrum is sheared
The corresponding second shear pin nail hole 1402 of the quantity of pin hole 702 and position is configured, in order to the peace of the second shear pin 12
Dress.
Illustratively, the quantity of centrum shear pin nail hole 702 can be 2, and along the outer wall of centrum 7 in 180 ° of distributions.
In addition, the upper end of slips 8 is connected to the centrum conical surface as shown in fig. 7, being additionally provided with the centrum conical surface 703 on centrum 7
On 703, and cooperate with the centrum conical surface 703.After extruding force of the slips 8 by lower contact 9, it can be slid up along the centrum conical surface 703
It is dynamic, so that the inner wall of the teeth contact casing of slips 8, and be engaging on internal surface of sleeve pipe.
The big channel bridge plug of a kind of minor diameter disclosed by the utility model, the vertical wells such as natural gas, coal bed gas, shale gas,
It is applicable in high angle hole, horizontal well, oil/gas well formation testing by layer, separate stratum fracfturing in the case of becoming smaller especially suitable for shaft way
Acidification, selective sand control, seperated layer water injection, layerwise production and closing water layer close the construction operations such as dried layer and closing waste layer.Together
When, overall structure, mode of giving up involved in the utility model, packing element combination, locking mode can be replaced by other way
Generation, but method and system framework still falls within the utility model mode.
The above is merely for convenience of it will be understood by those skilled in the art that the technical solution of the utility model, not to
Limit the utility model.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of bridge plug, which is characterized in that the bridge plug includes:
Central tube (14) and be sequentially sleeved at the outside of the central tube (14) and mutually abut top connection (1), main packing element
(4), centrum (7), slips (8), lower contact (9)；Wherein, the upper end of the slips (8) is connected to the conical surface of the centrum (7)
On；The top connection (1) is fixedly connected on the outside of the central tube (14)；
It is further characterized in that the bridge plug further include:
The first brambles pipe (11) being arranged between the lower contact (9) and the central tube (14), the first brambles pipe
(11) it is fixed on the outside of the central tube (14), and the lower contact (9) can be moved upwards along the first brambles pipe (11),
And it is fixed on the first brambles pipe (11)；
The first shear pin (10) being connected between the lower contact (9) and the central tube (14)；
The second brambles pipe (13) being arranged between the centrum (7) and the central tube (14), the second brambles pipe (13)
It is fixed on the outside of the central tube (14), and the centrum (7) can move upwards along the second brambles pipe (13), and fixed
On the second brambles pipe (13)；
The second shear pin (12) being connected between the centrum (7) and the central tube (14).
2. bridge plug according to claim 1, which is characterized in that the internal channel diameter of the bridge plug is not less than 50mm, described
The outer dia of bridge plug is not more than 93mm.
3. bridge plug according to claim 1, which is characterized in that the main packing element (4) is internally provided with expansion slot
(401)；
The expansion slot (401) is located at the middle part of the main packing element (4).
4. bridge plug according to claim 1, which is characterized in that be provided in the outer pipe wall of the first brambles pipe (11)
First brambles external tooth (1101) is provided with the first brambles internal tooth (1102) in inner pipe wall；
The outside of the central tube (14) is provided with central tube brambles external tooth (1401), the central tube brambles external tooth (1401) with
The first brambles internal tooth (1102) is locking；
The lower contact (9) is internally provided with lower contact brambles internal tooth (901), and the lower contact brambles internal tooth (901) can edge
The first brambles external tooth (1101) moves upwards, and is fixed on the first brambles external tooth (1101).
5. bridge plug according to claim 1, which is characterized in that be provided in the outer pipe wall of the second brambles pipe (13)
Second brambles external tooth (1301) is provided with the second brambles internal tooth (1302) in inner pipe wall；
The outside of the central tube (14) is provided with central tube brambles external tooth (1401), the central tube brambles external tooth (1401) with
The second brambles internal tooth (1302) is locking；
The centrum (7) is internally provided with centrum brambles internal tooth (701), and the centrum brambles internal tooth (701) can be along described
Two brambles external tooths (1301) move upwards, and are fixed on the second brambles external tooth (1301).
6. bridge plug according to claim 1, which is characterized in that the bridge plug further include:
It is set in the first secondary packing element (3) and the second secondary packing element (5) of the outside of the central tube (14)；
Described first secondary packing element (3) is set between the top connection (1) and the main packing element (4)；
Described second secondary packing element (5) is set between the main packing element (4) and the centrum (7).
7. bridge plug according to claim 6, which is characterized in that between the described first secondary packing element (3) and the main packing element (4)
With the bearing surface being bonded to each other；
There is the bearing surface being bonded to each other between described second secondary packing element (5) and the main packing element (4).
8. bridge plug according to claim 6, which is characterized in that the bridge plug further include:
It is set in the first retaining ring (2) and the second retaining ring (6) of the outside of the central tube (14)；
First retaining ring (2) is set between the top connection (1) and the first secondary packing element (3)；
Second retaining ring (6) is set between the described second secondary packing element (5) and the centrum (7).
9. bridge plug according to claim 8, which is characterized in that first retaining ring (2) and the first secondary packing element (3) it
Between there is the bearing surface that is bonded to each other；
There is the bearing surface being bonded to each other between second retaining ring (6) and the second secondary packing element (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821227898.6U CN208950528U (en) | 2018-08-01 | 2018-08-01 | Bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821227898.6U CN208950528U (en) | 2018-08-01 | 2018-08-01 | Bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112576231A (en) * | 2021-02-24 | 2021-03-30 | 四川省威沃敦化工有限公司 | All-metal soluble fracturing sectionalizer |
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