CN202249930U - Self-locking rubber plug - Google Patents
Self-locking rubber plug Download PDFInfo
- Publication number
- CN202249930U CN202249930U CN 201120397044 CN201120397044U CN202249930U CN 202249930 U CN202249930 U CN 202249930U CN 201120397044 CN201120397044 CN 201120397044 CN 201120397044 U CN201120397044 U CN 201120397044U CN 202249930 U CN202249930 U CN 202249930U
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- main body
- self
- lock pin
- along
- spacing
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Abstract
The utility model relates to a self-locking rubber plug, which comprises a main body, at least two lock pins and springs, wherein the length direction of the main body extends along the axial direction of the main body; a pressure relief channel is formed in the main body; the lock pins are embedded and matched with positioning grooves of corresponding connecting bases for positioning; the springs are used for driving the corresponding lock pins to be adjusted in a telescoping manner along the radial direction of the main body; guiding blind holes are formed on the outer peripheral face of the main body and used for guided sliding assembly with the lock pins in a one-to-one correspondence manner, and the guiding directions of the guiding blind holes extend along the radial direction of the main body; the guiding blind holes are isolated from the channel cavity of the pressure relief channel; and the tail end of each guide blind hole is provided with a blocking bottom face used for the top mounting of the corresponding spring. According to the utility model, the problem that the self-locking rubber plug is stressed laterally to easily damage the lock pins in the prior art is improved.
Description
Technical field
The utility model relates to the oil drilling field, relates in particular to the self-locking plug that is used to cement the well in a kind of Casing Drilling Technique.
Background technology
Oil field float collar, float shoe formula pressure controls of adopting in the well drilling and cementing construction are waited device with fixed attention more; Owing to disturbed by gas contained in the down-hole liquid and other impurity; The situation that well cementation liquid flows backwards or the time that builds the pressure is coagulated often occurs, not only increased difficulty of construction, but also influenced cementing quality.
For addressing the above problem, use the self-locking plug usually, the self-locking plug has the mechanical self-latching positioning function, can control well cementation liquid reliably and flow backwards.According to Chinese patent CN 201810264 U disclosed " a kind of lockpin-type cementing plug "; Well cementation jumped a queue be defined as above-below direction along the moving direction of corresponding well cementation tube; Described cementing plug comprises cylindrical bodies; The upper end of said main body is equipped with skirt along shape glue bowl, and the periphery of said main body is provided with sealing ring.Offer between the lower surface of said main body and the outer peripheral face of said main body and be used for the unidirectional pressure release passage that releases of the pressure between said glue bowl and the said sealing ring; Described pressure release passage comprises the main channel that an end is communicated with the lower surface of said main body; The length bearing of trend of said main channel is axial consistent with said main body; Described pressure release passage also comprises length direction and assembling passage that with said main channel be communicated with parallel with the length direction of said main channel; Lower channel and upper channel that axially spaced-apart through two said main bodys in edge between the outer peripheral face of described assembling passage and said main body is set up in parallel are communicated with; Described upper channel is arranged on the main body between said sealing ring and the said glue bowl, is provided with the unidirectional ball-and-seat that is released into said cementing plug below of the pressure that is used between said sealing ring and the said glue bowl between described assembling passage and the described upper channel.Also offer the guiding blind hole of length direction between the outer peripheral face of described main channel and said main body along the radially deepening of said main body; Slidable fit is useful on the lock pin of locating with the locating slot scarf of corresponding Connection Block in the described guiding blind hole; The top is furnished with and is used for the spring that said lock pin is regulated along said main body radial expansion between the conduit wall of described lock pin and said main channel, also is provided with on the outer peripheral face of said main body to be used for said lock pin and to move radially spacing stop screw along said main body.
During use, said fixedly plug comes downwards to the Connection Block position for putting under the promotion of liquid, and in the descending process of fixing plug, the pressure between said sealing ring and the said glue bowl can be through ball-and-seat release, thereby the assurance main body gets in the Connection Block smoothly; Under the effect of spring, lock pin just can embed in the locating slot on the Connection Block, realizes the lock-bit of said cementing plug simultaneously.
But the shortcoming that existing cementing plug exists is: be used to realize that lock pin withstands on the duct wall of said trunk line along an end of the spring of said main body radial expansion adjusting; For avoiding mutual interference; Said lock pin same circumferencial direction under the set-up mode of this spring can only have one, that is to say, fixedly plug is realized by a lock pin in the lock-bit that makes progress in same week; Because fixing glue beyond the Great Wall, the below also exists pressure differential; And said main body can only lean on one-sided lock pin to bear one-sided pressure, and lock pin very easily is damaged, and finally causing fixedly, plug lost efficacy; And lock pin to be that stop screw by correspondence carries out spacing, assemble very loaded down with trivial details.
Summary of the invention
The purpose of the utility model is to provide a kind of self-locking plug, and to improve in the prior art, the self-locking plug is because the one-sided stressed problem that causes lock pin to damage easily.
In order to address the above problem, the technical scheme of the utility model is:
A kind of self-locking plug; Described self-locking plug comprises that length direction is along its axially extended main body; Offer pressure release passage in the said main body; Described self-locking plug also comprises at least two lock pins that are used for locating with the locating slot scarf of corresponding Connection Block and drives the springs that corresponding lock pin is regulated along said main body radial expansion; Offer guide direction on the outer peripheral face of said main body and radially extend and be used for the guiding blind hole of the corresponding one by one guiding of each lock pin slidable fit along said main body, the channel lumens of said guiding blind hole and said pressure release passage is isolated, and said each guiding blind hole end all has and is used for the shutoff bottom surface that corresponding spring top is adorned.
Described lock pin is divided into two groups, and to the spacing parallel arranging setting, described every group of lock pin all has two and be distributed in the periphery of said main body at least to said two groups of lock pins along body shaft.
The hole of said each guiding blind hole is along locating all to be fixed with spacing catch, and said lock pin is arranged in the spacing hole of offering on the corresponding spacing catch.
The beneficial effect of the utility model is: lock pin has at least two in the utility model; Said main body is when locating with the locating slot scarf of corresponding Connection Block; The suffered pressure of main body is born by all lock pins jointly; Single lock pin can not bear very big power, compared with prior art, has improved existing self-locking plug because the one-sided stressed problem that causes lock pin to damage easily.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the user mode figure of Fig. 1.
The specific embodiment
A kind of self-locking plug embodiment is shown in Fig. 1 ~ 2: self-locking plug 1 comprises that length direction is along its axially extended main body 2.The upper end of said main body 2 is fixed with glue bowl 9, and the periphery of said main body 2 is provided with sealing ring 6, is provided with the pressure release passage of the pressure derivation that is used between said sealing ring 6 and the said glue bowl 8 between the lower surface 20 of said main body 2 and the outer peripheral face of said main body 2.Described self-locking plug 1 also comprises and is used at least two lock pins 3 of locating with locating slot 23 scarves of corresponding Connection Block 22 and drives the spring 4 that corresponding lock pin 3 is regulated along said main body 2 radial expansions.Offer guide direction on the outer peripheral face of said main body 2 and radially extend and be used for the guiding blind hole 12 of the corresponding one by one guiding slidable fit of each lock pin 3 along said main body 2; Said guiding blind hole 12 is isolated with the channel lumens of said pressure release passage, and said each guiding blind hole 12 end all have the shutoff bottom surface (figure does not mark) that is used for corresponding spring 4 top dresses.
Lock pin 3 in the foregoing description is divided into two groups, and said two groups of lock pins are set up in parallel along main body 2 axially spaced-aparts, and described every group of lock pin all has two and be distributed in the periphery of said main body 2 at least.In other embodiment of the utility model, described lock pin 3 is gone back one group, three groups or four groups; Described every group of lock pin 3 also can not be the periphery that is distributed in said main body 2 by the form that is uniformly distributed with.
The hole of each the guiding blind hole 12 in the foregoing description is along locating all to be fixed with spacing catch 15; Said lock pin 3 is arranged in the spacing hole of offering on the corresponding spacing catch 15, and the Kong Yanchu of described spacing hole is provided with said lock pin 3 along the spacing spacing end face of guiding moving direction block.In other embodiment of the utility model, described spacing catch 15 can also not established, and needs to use the spring 4 with reasonable stroke this moment, can come downwards to locating slot 23 places of corresponding Connection Block 22 smoothly to guarantee self-locking plug 1.
Axially offer the screw (not marking among the figure) that runs through its front/rear end along it in the glue bowl 9 in the foregoing description; Be equipped with screw rod 12 in the described screw; Be threaded respectively in the upper and lower side of said glue bowl 9 on the said screw rod 12 and be useful on the seaming chuck 10 and push-down head 8 that said glue bowl 9 moves axially the location, said screw rod 12 is connected away from an end and described main body 2 coaxial threaded of said seaming chuck 10.Described glue bowl 9 is set side by side with multiple tracks skirt shape along its axially spaced-apart and turns edge 11.In other embodiment of the utility model; Said screw rod 12 can also be the multidiameter structure in assembling place that is connected of said glue bowl 9; Described multidiameter is provided with a plurality of positioning boss side by side along its axially spaced-apart, offers in the described glue bowl 9 to be used for cooperating with said boss block and said glue bowl 9 being moved along its axis spacing annular spacing groove.
The length bearing of trend of main channel 16 and said main body 2 is axial consistent in the foregoing description.Described pressure release passage also comprises two length direction and assembling passages 17 that with said main channel 16 be communicated with parallel with the length direction of said main channel 16; Described two assembling passages 17 are symmetrically distributed along the axis of said main bodys, between the outer peripheral face of described two assembling passages 17 and said main body 2 all the lower channel 19 and the upper channel 18 that are set up in parallel of the axially spaced-apart through two said main bodys 2 in edge be communicated with.Described upper channel 18 is arranged on the main body 2 between said sealing ring 6 and the said glue bowl 9, is provided with the unidirectional ball-and-seat 7 that is released into 1 side under the said self-locking plug of the pressure that is used between said sealing ring 6 and the said glue bowl 9 between described assembling passage 17 and the described upper channel 18.In other embodiment of the utility model, the length direction of described main channel 16 can be not yet axial consistent with said main body 2.
As shown in Figure 2 during use, described self-locking plug 1 is dropped in the corresponding stationary magazine creel, self-locking plug 1 in the tube under the effect of fluid pressure, comes downwards to Connection Block 22 places of stationary magazine creel bottom above it, and Connection Block 22 inner spaces from top to bottom diminish gradually.When self-locking plug 1 came downwards to certain position, Connection Block 22 had limited the descending of self-locking plug 1, realized bruising.The lock pin 3 of self-locking this moment plug 1 is in the locating slot 23 of Connection Block 22, and self-locking plug 1 is realized self-locking, and the cement paste of self-locking plug 1 below can't be got in the stationary magazine creel, coagulates requirement thereby satisfy to open to press to wait.
In the descending process of self-locking plug 1; Form a confined space between sealing ring 6 and the said glue bowl 9, this confined space is full of liquid, and diminishing and produce high pressure with distance between self-locking plug 1 and the Connection Block 22; Limit the descending of self-locking plug 1; But, thereby guarantee the 1 smooth self-locking of self-locking plug because the existence of pressure release passage can realize the unidirectional release of pressure between sealing ring 6 and the said glue bowl 9.Because guiding blind hole 21 is not communicated with main channel 16; Make can along main body 2 circumferentially offer two, three or more; Thereby a plurality of lock pins 3 can be set; A plurality of lock pins 3 are shared the pressure that said self-locking plug 1 is born jointly, make single lock pin 3 owing to stressed reducing is not easy to damage, and finally guarantee the 1 smooth self-locking of self-locking plug.
Claims (3)
1. self-locking plug; Described self-locking plug comprises that length direction is along its axially extended main body; Offer pressure release passage in the said main body; It is characterized in that: described self-locking plug also comprises at least two lock pins that are used for locating with the locating slot scarf of corresponding Connection Block and drives the springs that corresponding lock pin is regulated along said main body radial expansion; Offer guide direction on the outer peripheral face of said main body and radially extend and be used for the guiding blind hole of the corresponding one by one guiding of each lock pin slidable fit along said main body, the channel lumens of said guiding blind hole and said pressure release passage is isolated, and said each guiding blind hole end all has and is used for the shutoff bottom surface that corresponding spring top is adorned.
2. self-locking plug according to claim 1 is characterized in that: described lock pin is divided into two groups, and to the spacing parallel arranging setting, described every group of lock pin all has two and be distributed in the periphery of said main body at least to said two groups of lock pins along body shaft.
3. self-locking plug according to claim 1; It is characterized in that: the hole of said each guiding blind hole is along locating all to be fixed with spacing catch; Said lock pin is arranged in the spacing hole of offering on the corresponding spacing catch, and the Kong Yanchu of described spacing hole is provided with said lock pin along the spacing spacing end face of guiding moving direction block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397044 CN202249930U (en) | 2011-10-18 | 2011-10-18 | Self-locking rubber plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120397044 CN202249930U (en) | 2011-10-18 | 2011-10-18 | Self-locking rubber plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249930U true CN202249930U (en) | 2012-05-30 |
Family
ID=46111189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120397044 Expired - Fee Related CN202249930U (en) | 2011-10-18 | 2011-10-18 | Self-locking rubber plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249930U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790550A (en) * | 2012-11-05 | 2014-05-14 | 王震 | Intelligent downhole plug device |
| CN106837238A (en) * | 2016-12-21 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of self-locking plug |
-
2011
- 2011-10-18 CN CN 201120397044 patent/CN202249930U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790550A (en) * | 2012-11-05 | 2014-05-14 | 王震 | Intelligent downhole plug device |
| CN106837238A (en) * | 2016-12-21 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of self-locking plug |
| CN106837238B (en) * | 2016-12-21 | 2019-05-07 | 中国石油天然气股份有限公司 | A kind of self-locking rubber plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20171018 |