CN207761622U - The wear-resisting anti-backflow rubber plug of well cementation - Google Patents
The wear-resisting anti-backflow rubber plug of well cementation Download PDFInfo
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- CN207761622U CN207761622U CN201721534246.2U CN201721534246U CN207761622U CN 207761622 U CN207761622 U CN 207761622U CN 201721534246 U CN201721534246 U CN 201721534246U CN 207761622 U CN207761622 U CN 207761622U
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- rubber plug
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- seal head
- wear
- bruising
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Abstract
The utility model discloses a kind of wear-resisting anti-backflow rubber plugs of well cementation, including rubber plug mechanism and Peng Ya mechanisms, rubber plug mechanism includes rubber plug body, rubber plug core, self-locking tooth and seal head, multiple fins with back rake angle are provided on rubber plug body, rubber plug body fixation is set on rubber plug core, seal head is fixedly connected with rubber plug core, and self-locking tooth is provided on seal head；Peng Ya mechanisms include impacting seat and bruising float collar, and impacting seat and bruising float collar are axially through impacting seat sealing is fixed in bruising float collar, is provided on impacting seat inner wall and the matched self-locking structure of self-locking tooth on seal head.After in the utility model sleeve pipe, side and tube wall contact surface are larger, and since the motive force of liquid is injected at rubber plug rear portion, can remain has larger contact force and contact area between side and tube wall, good isolation effect is played in the automatic compensation after abrasion.
Description
Technical field
The utility model discloses a kind of wear-resisting anti-backflow rubber plugs for oil gas field cementing operation operation, belong to oil gas field
Underground operation tool.
Background technology
After spudder completes, in order to make can smoothly to produce from now on, needs to carry out well cementing operation, but implementing
Before well cementing operation, due to there is the drilling mud for not returning out ground in well, implement conventional cementing operation, carry out water filling
Before and after mud, be required for using rubber plug by casing the cement mortar of mud, injection and the mud of replacement separate, keep away
Exempt to cause the slurry of drilling mud and cementing slurry, reaching prevents cementing slurry from being occurred by the problem of drilling mud pollution.
The rubber plug in well is put under the promotion of well cementation pump fluid injection body, bruising from impacting seat is come downwards to from well head, is finally reached casing shoe
Place forms the effect of good cement sealing quality.
In the prior art, Chinese patent " 200810102991.9 " discloses a kind of Skidproof well cementing rubber plug, described anti-skidding solid
Well rubber plug includes：Chock plug, collet, the multistage plate-like wing and skid resistant course, are distributed with multiple pits or prominent on the lower surface of skid resistant course
It rises.In cementing job, the lower surface of skid resistant course and cements, for dimpled Skidproof well cementing rubber plug, cement meeting
It is filled into skid resistant course pit.Chinese patent " CN203603840U " discloses a kind of wear-resisting rubber plug of well cementation, and the well cementation is used
Wear-resisting rubber plug includes pedestal and rubber plug body, and the rubber plug body rear portion is cylindrical in shape in spherical or ellipsoid, front, rubber plug body front
It is connected on pedestal, fin is provided on the outer wall of rubber plug body front.After in the utility model sleeve pipe, side is contacted with tube wall
Face is larger, and due to the motive force of rubber plug top pumping liquid, can remain has larger contact force between side and tube wall
And contact area, form the automatic compensation effect after abrasion.
Existing cementing plug can preferably realize the cement mortar of injection and being isolated for subsequent mud, can also realize compared with
Good bruising, still, when float collar is using failing, since the density of annular space cement mortar is generally all higher than the density of mud in pipe,
The rubber plug of onsite application cannot hinder cement mortar to flow back, and patent " 200810102991.9 " discloses Skidproof well cementing rubber plug and patent
" CN203603840U " discloses well cementation and is not always the case with wear-resisting rubber plug, causes lower cement plug overlength, increases and bores the plug time, simultaneously
Annular space top cement mortar will lack, and influence the cementing quality on top, and hidden danger has been buried to later oil well production.
Invention content
The purpose of the utility model is to overcome the above problems of the existing technology, provide a kind of cement the well and are resisted back with wear-resisting
Gummosis plug.After in the utility model sleeve pipe, side and tube wall contact surface are larger, and since pushing away for liquid is injected at rubber plug rear portion
Power, can remain has larger contact force and contact area between side and tube wall, and the automatic compensation after abrasion is played good
Good isolation effect.Meanwhile after the rubber plug and impacting seat bruising, seal head is by self-locking tooth and impacting seat self-locking and seals, energy
Larger back pressure is born, even if float collar can prevent cement mortar from flowing back if failure, to ensure accurately controlling for cement plug, is saved
The plug time is bored, cementing quality is improved.
To achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of wear-resisting anti-backflow rubber plug of well cementation, it is characterised in that：Including rubber plug mechanism and Peng Ya mechanisms, rubber plug mechanism packet
Rubber plug body, rubber plug core, self-locking tooth and seal head are included, multiple fins with back rake angle are provided on rubber plug body, rubber plug body is fixed
It is set on rubber plug core, seal head is fixedly connected with rubber plug core, and self-locking tooth is provided on seal head；Peng Ya mechanisms include impacting seat
With bruising float collar, impacting seat and bruising float collar are axially through impacting seat sealing is fixed in bruising float collar, on impacting seat inner wall
It is provided with and the matched self-locking structure of self-locking tooth on seal head.
Multiple annular grooves are arranged at intervals on the rubber plug outer core, rubber plug body corresponds to annular groove and is provided with multiple raised lines,
Rubber plug body is embedded in annular groove by raised line and vulcanizes on rubber plug core.
The rubber plug body rear portion is in sphere or spheroid, and front is in cylinder, and being arranged at intervals on cylinder multiple has back rake angle
Fin.
The seal head is threadedly attached in the front end of rubber plug core, and seal head front is hollow cone cylinder, and rear end is envelope
Closed end is provided with annular groove on the cylinder of hollow cone cylinder, sealing ring is provided in annular groove.
The self-locking tooth is cylindrical, and the inner cylinder face front end of self-locking tooth is in horn-like, and the outer wall of self-locking tooth is zigzag
Screw thread or multiple equidistant zigzag slots.
Self-locking structure in the impacting seat is saw-tooth thread or multiple equidistant zigzag skewed slots.
Using the utility model has the advantage of：
One, the utility model includes rubber plug body, rubber plug core, seal head, self-locking tooth, impacting seat and bruising float collar etc., described
Rubber plug body rear portion is in sphere or spheroid, and front is in cylinder, and multiple fins for having back rake angle are arranged at intervals on cylinder cylinder, should
The advantageous effect of structure is that rubber plug body side surface and tube wall contact surface are larger, under the promotion force effect of liquid, can be remained
There are larger contact force and contact area between rubber plug body side surface and tube wall, and there is wear-compensating effect, to improve rubber plug
Isolation and cleaning effect, and multiple fins for playing the role of back rake angle have righting placed in the middle, and frictional resistance is smaller.
Two, in the utility model, multiple annular grooves are arranged at intervals on the rubber plug outer core, front outer wall is cone column
Body, rubber plug body insertion vulcanization can be such that rubber plug core is not detached with rubber plug body, move integrally, ensure isolation effect on rubber plug core.
Three, in the utility model, the seal head is threadedly attached in the front end of rubber plug core, and the seal head front is
It is hollow, the weight of rubber plug integral head can be mitigated, can slow down the fin quilt cover tube wall eccentric wear of rubber plug body in net horizontal section, ensure glue
Plug is placed in the middle always, improves isolation effect.
Four, in the utility model, the rubber plug core and seal head front outer wall are cone cylinder, the impacting seat be it is hollow,
Big angle is fallen in the rear end of inner cylinder face, which can guide rubber plug to enter impacting seat, smoothly realize bruising.
Five, in the utility model, sealing ring is provided in the seal head forward cylinder, the middle part of seal head is pillar
Body, middle part cylinder are less than forward cylinder, and excessive by the conical surface between two cylinders, the self-locking tooth is that hollow thin-wall cylinder body outer wall is
Saw-tooth thread or multiple equidistant zigzag slots, and side wall is axially provided with perforation notch, self-locking tooth is mounted in seal head
On the paxilla in portion, impacting seat is mounted on by screw thread and sealing structure in bruising float collar, and impacting seat inner wall is also set on cylindrical surface
Be equipped with saw-tooth thread or multiple equidistant zigzag skewed slots, the tooth form on impacting seat inner wall cylindrical surface and cylindrical surface with it is close
End socket cooperates, and the advantageous effect of the structure is that, when rubber plug and impacting seat bruising, seal head is self-locking in bruising by self-locking tooth
In seat, positive sealing bruising had both been realized, also realize reversed sealing anti-backflow, ensure cement plug precise control, play saving and bore plug
Time and the effect for improving cementing quality.
Description of the drawings
Fig. 1 is the utility model rubber plug mechanism structure schematic diagram；
Fig. 2 is that the utility model touches sub- mechanism structure schematic diagram；
Fig. 3 is the structural schematic diagram after the utility model rubber plug mechanism and the bruising self-locking of Peng Ya mechanisms.
In figure label for：1, rubber plug body, 2, rubber plug core, 3, self-locking tooth, 4, seal head, 5, sealing ring, 6, impacting seat, 7 touch
Press float collar.
Specific implementation mode
Embodiment 1
A kind of wear-resisting anti-backflow rubber plug of well cementation, including rubber plug mechanism and Peng Ya mechanisms, rubber plug mechanism include rubber plug body 1,
Rubber plug core 2, self-locking tooth 3 and seal head 4, multiple fins with back rake angle are provided on rubber plug body 1, and the fixation of rubber plug body 1 is arranged
On rubber plug core 2, seal head 4 is fixedly connected with rubber plug core 2, and self-locking tooth 3 is provided on seal head 4；Peng Ya mechanisms include bruising
Seat 6 and bruising float collar 7, impacting seat 6 and bruising float collar 7 are axially through the sealing of impacting seat 6 is fixed in bruising float collar 7, bruising
It is provided with and the 3 matched self-locking structure of self-locking tooth on seal head 4 on 6 inner walls of seat.
In the present embodiment, multiple annular grooves are arranged at intervals on 2 outer wall of rubber plug core, rubber plug body 1 corresponds to annular groove and sets
Multiple raised lines are equipped with, rubber plug body 1 is embedded in annular groove by raised line and vulcanizes on rubber plug core 2.
In the present embodiment, 1 rear portion of the rubber plug body is in sphere or spheroid, and front is in cylinder, is arranged at intervals on cylinder
Multiple fins for having back rake angle.
In the present embodiment, the seal head 4 is threadedly attached in the front end of rubber plug core 2, and 4 front of seal head is hollow cone
Cylinder, rear end are blind end, and annular groove is provided on the cylinder of hollow cone cylinder, sealing ring 5 is provided in annular groove.
In the present embodiment, the self-locking tooth 3 is cylindrical, and the inner cylinder face front end of self-locking tooth 3 is in horn-like, self-locking tooth 3
Outer wall be saw-tooth thread or multiple equidistant zigzag slots.
In the present embodiment, the self-locking structure in the impacting seat 6 is saw-tooth thread or multiple equidistant zigzag skewed slots.
Embodiment 2
As shown, a kind of wear-resisting anti-backflow rubber plug of well cementation, including rubber plug body 1, rubber plug core 2, self-locking tooth 3, seal head
4, sealing ring 5, impacting seat 6, bruising float collar 7, rubber plug body 1 are attached to the rear portion of rubber plug core 2, glue by the vulcanization of multiple annular grooves
In spherical or ellipsoid, front is in cylinder, and multiple fins for having back rake angle are provided on cylinder outer wall at cock body 1 rear portion,
The front outer wall of rubber plug core 2 is cone cylinder, and 4 casing threads of seal head is connected to the front of rubber plug core 2, the front of seal head 4
For hollow cone cylinder, sealing ring 5 is set, and the middle part of seal head 4 is paxilla, 4 middle part paxilla of seal head and front on cylinder
It is excessive to bore the cylinder conical surface, self-locking tooth 3 is hollow thin-wall cylinder, and big angle is fallen in cylinder inboard wall front end, and cylinder body outer wall is saw-tooth thread
Or multiple equidistant zigzag slots, cylinder lateral wall are axially provided with perforation notch, self-locking tooth 3 is mounted on the small of 4 middle part of seal head
On cylinder, impacting seat 6 is mounted on by screw thread and sealing structure in bruising float collar 7, and the rear end of 6 inner cylinder face of impacting seat is big
Angle is additionally provided with the saw-tooth thread coordinated with seal head 4 or multiple equidistant zigzag skewed slots on inner wall cylindrical surface.
The utility model is at the scene in use, be arranged bruising mechanism shown in Fig. 2 the artificial bottom of a well on casing runs through
Position, and be lowered into well together with casing, cementing operation is then carried out, at the end of cementing operation cementing, input is shown in FIG. 1
Rubber plug mechanism, then mud is replaced, when rubber plug runs to bruising float collar 7, seal head 4 enters in impacting seat 6, and self-locking tooth 3 is stuck in bruising
In seat 6, as shown in figure 3, seal head 4 realizes two way seal with impacting seat 6, to realize that the bruising of cementing operation forward direction and direction are anti-
Reflux, cementing operation terminate.
Claims (6)
1. a kind of wear-resisting anti-backflow rubber plug of well cementation, it is characterised in that：Including rubber plug mechanism and Peng Ya mechanisms, rubber plug mechanism includes
Rubber plug body（1）, rubber plug core（2）, self-locking tooth（3）And seal head（4）, rubber plug body（1）On be provided with multiple wings with back rake angle
Piece, rubber plug body（1）Fixation is set in rubber plug core（2）On, seal head（4）With rubber plug core（2）It is fixedly connected, seal head（4）On set
It is equipped with self-locking tooth（3）, seal head（4）Front is hollow cone cylinder, and rear end is blind end；Peng Ya mechanisms include impacting seat（6）With
Bruising float collar（7）, impacting seat（6）With bruising float collar（7）Axially through impacting seat（6）Sealing is fixed on bruising float collar（7）
It is interior, impacting seat（6）It is provided on inner wall and seal head（4）On self-locking tooth（3）Matched self-locking structure.
2. the wear-resisting anti-backflow rubber plug of well cementation according to claim 1, it is characterised in that：The rubber plug core（2）On outer wall
It is arranged at intervals with multiple annular grooves, rubber plug body（1）Corresponding annular groove is provided with multiple raised lines, rubber plug body（1）It is embedded in by raised line
Annular groove simultaneously vulcanizes in rubber plug core（2）On.
3. the wear-resisting anti-backflow rubber plug of well cementation according to claim 2, it is characterised in that：The rubber plug body（1）Rear portion is in
Sphere or spheroid, front are in cylinder, and multiple fins for having back rake angle are arranged at intervals on cylinder.
4. the wear-resisting anti-backflow rubber plug of well cementation according to claim 3, it is characterised in that：The seal head（4）Pass through spiral shell
Line is connected to rubber plug core（2）Front end, be provided with annular groove on the cylinder of hollow cone cylinder, sealing ring be provided in annular groove
（5）.
5. the wear-resisting anti-backflow rubber plug of well cementation according to claim 4, it is characterised in that：The self-locking tooth（3）In cylinder
Shape, self-locking tooth（3）Inner cylinder face front end be in horn-like, self-locking tooth（3）Outer wall be saw-tooth thread or multiple equidistant saws
Serrate slot.
6. the wear-resisting anti-backflow rubber plug of well cementation according to claim 5, it is characterised in that：The impacting seat（6）It is interior from
Lock construction is saw-tooth thread or multiple equidistant zigzag skewed slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721534246.2U CN207761622U (en) | 2017-11-16 | 2017-11-16 | The wear-resisting anti-backflow rubber plug of well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721534246.2U CN207761622U (en) | 2017-11-16 | 2017-11-16 | The wear-resisting anti-backflow rubber plug of well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207761622U true CN207761622U (en) | 2018-08-24 |
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ID=63188919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721534246.2U Active CN207761622U (en) | 2017-11-16 | 2017-11-16 | The wear-resisting anti-backflow rubber plug of well cementation |
Country Status (1)
| Country | Link |
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| CN (1) | CN207761622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720092A (en) * | 2020-07-03 | 2020-09-29 | 常熟市石油固井工具有限公司 | Spherical high-pressure rubber plug for well cementation operation |
-
2017
- 2017-11-16 CN CN201721534246.2U patent/CN207761622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720092A (en) * | 2020-07-03 | 2020-09-29 | 常熟市石油固井工具有限公司 | Spherical high-pressure rubber plug for well cementation operation |
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