CN202954780U - Combined rubber plug for well cementation - Google Patents
Combined rubber plug for well cementation Download PDFInfo
- Publication number
- CN202954780U CN202954780U CN2012206916569U CN201220691656U CN202954780U CN 202954780 U CN202954780 U CN 202954780U CN 2012206916569 U CN2012206916569 U CN 2012206916569U CN 201220691656 U CN201220691656 U CN 201220691656U CN 202954780 U CN202954780 U CN 202954780U
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- assembly
- mud scraper
- subassembly
- mud
- snap ring
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Abstract
The utility mode provides a combined rubber plug for well cementation. The combined rubber plug comprises a sealing subassembly, a first mud scraper subassembly, a second mud scraper subassembly and a self-lock snap ring, wherein the sealing subassembly, the first mud scraper subassembly, the second mud scraper subassembly and the self-lock snap ring are annular; the upper end of the first mud scraper subassembly is connected with the lower end of the sealing subassembly through a thread; the lower end of the first mud scraper subassembly is connected with the upper end of the second mud scraper subassembly through the thread; a snap ring groove and a sealing ring groove are arranged at the outer wall of the second mud scraper subassembly; the snap ring is arranged at the lower end of the outer wall of the second mud scraper subassembly; the self-lock snap ring is sleeved inside the snap ring groove; the shape is of an inverted truncated cone; the outer walls of the sealing subassembly, the first mud scraper subassembly and the second mud scraper subassembly are provided with annular lips of which the included angles together with the axial direction are orderly increased are arranged on the circumference; the diameter of the upper end face of each annular lip is greater than that of the lower end face; different functions of rubber plugs are combined together; and different plastic subassemblies are separately fabricated and assembled finally. Thus, the combined rubber plug is convenient to process and operate, and especially the combined rubber plug has good tightness, sewage disposal function and positioning function.
Description
Technical field
The utility model belongs to the drilling technology field, is specifically related to a kind of well cementation combined type plug.
Background technology
In the well cementing operation process, after cement paste has injected, need be lowered to the bruising plug, to replace cement paste in sleeve pipe, enter annular space.Under normal circumstances, the bruising plug is obstructed while going downwards to the block ring position, and due to the sealing function of plug, pump pressure raises.In this process, the bruising plug mainly contains three effects: the one, bear the top head of liquid descending, and cement paste in sleeve pipe is replaced to annular space, and internal surface of sleeve pipe is cleaned out; The 2nd, the displacement fluid on isolation bottom cement and plug top, do not make displacement fluid and cement alter mutually; The 3rd, when the bruising plug goes downwards to the block ring position, descending being obstructed causes pump pressure to raise (this process is called bruising).Following problem often appears in plug at present commonly used: the one, and the top displacement fluid is scurried into the bottom cement paste; The 2nd, the internal surface of sleeve pipe cleaning is unclean.
The utility model content
The purpose of this utility model be solve the cleaning internal surface of sleeve pipe that existing well cementation exists with plug clean, seal the bad displacement fluid that causes and scurry into cement paste and holding up when binding round/holding up the footwear one-way sealing and losing efficacy, plug is because of the problem of annular space buffer brake rollback.
For reaching above-mentioned purpose, the utility model provides a kind of well cementation combined type plug, and its special character is, comprises that setting assembly, first scrapes mud assembly, second and scrape mud assembly and self-locking snap ring; This setting assembly, first scrapes that mud assembly, second is scraped the mud assembly and the self-locking snap ring is all annular; The first lower end of scraping the upper end of mud assembly and described setting assembly is by thread connection, and the upper end thread connection of mud assembly is scraped in its lower end and second; This second is scraped on mud assembly outer wall and is provided with annular groove and closure gasket groove, and annular groove is placed in this second lower end of scraping mud assembly outer wall; Described self-locking card ring set is located in this annular groove, and its profile is reverse frustoconic; Described setting assembly, first is scraped mud assembly and second and is scraped the outer wall of mud assembly and circumferentially be provided with the annular lip increased successively with axial angle, and the upper surface diameter of this annular lip is greater than its lower surface diameter.
The external diameter of above-mentioned setting assembly is less than described first and scrapes the external diameter that mud assembly and second is scraped the mud assembly.
The utility model has the advantages that: by the rubber plug combination of difference in functionality together, the assembly of different colloids is separately made, and processing and operation are convenient in finally assembling, especially have good sealing, decontamination function and positioning function.
The accompanying drawing explanation
Below with reference to accompanying drawing, the utility model is described in further details:
Fig. 1 is combined type plug structural representation for well cementation.
In figure: 1, self-locking snap ring; 2, second scrape the mud assembly; 3, first scrape the mud assembly; 4, setting assembly; 5, annular lip; 6, annular groove; 7, closure gasket groove.
The specific embodiment
For solve the cleaning internal surface of sleeve pipe that existing well cementation exists with plug clean, seal the bad displacement fluid that causes and scurry into cement paste and holding up when binding round/holding up the footwear one-way sealing and losing efficacy, plug is because of the problem of annular space buffer brake rollback, the present embodiment provides the combined type plug of the well cementation shown in a kind of Fig. 1, comprises that setting assembly 4, first scrapes mud assembly 3, second and scrape mud assembly 2 and self-locking snap ring 1; This setting assembly 4, first scrapes that mud assembly 3, second is scraped mud assembly 2 and self-locking snap ring 4 is all annular; The first lower end of scraping the upper end of mud assembly 3 and setting assembly 4 is by thread connection, and the upper end thread connection of mud assembly 2 is scraped in its lower end and second; This second is scraped on mud assembly 2 outer walls and is provided with annular groove 6 and closure gasket groove 7, and annular groove 6 is placed in this second lower end of scraping mud assembly 2 outer walls, and self-locking snap ring 1 is set in this annular groove 6, and its profile is reverse frustoconic; Setting assembly 4, first is scraped mud assembly 3 and second and is scraped the outer wall of mud assembly 2 and circumferentially be provided with the annular lip 5 increased successively with axial angle, and the upper surface diameter of this annular lip 5 is greater than its lower surface diameter.The external diameter of setting assembly 4 is slightly less than first and scrapes the external diameter that mud assembly 3 and second is scraped mud assembly 2.
It should be noted that second, to scrape mud assembly 2 elasticity tensions moderate, has tear resistance preferably, and first to scrape mud assembly 3 elasticity tensions larger, and the elasticity tension of setting assembly 4 is less.The effect of setting assembly 4 is mainly to be subject to the top hydraulic action, and annular lip 5 and casing wall close contact, play sealing function, cuts off top displacement fluid and bottom cement paste.
During work, scrape mud assembly 2 by second, in sleeve pipe, cement paste is pressed into annular space, and inwall is cleaned substantially, possible residual water mud, and through elasticity tension, larger first scrapes mud assembly 3 and is cleaned.Setting assembly 4 is under the pressure-acting of top displacement fluid, and its annular lip 5 is fully opened, and with the internal surface of sleeve pipe close contact, reaches good sealing effectiveness.
During work, the well cementation that the present embodiment provides needs with the bottom plug matched with it, holds up hoop to be used in conjunction with the combined type plug.The bottom plug self-locking ring snaps in holds up the hoop annular groove, and the snap ring of this utility model snaps in the annular groove of bottom plug, holds up hoop, bottom plug, bruising plug to form one and connects string.
With the combined type plug by the rubber plug combination of difference in functionality together, the assembly of different colloids is separately made in the well cementation that the present embodiment provides, and finally assembling, be convenient to processing.Using method is identical with plug commonly used, convenient operation.
More than exemplifying is only to illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, within the every and same or analogous design of the utility model all belongs to protection domain of the present utility model.
Claims (2)
1. a well cementation combined type plug is characterized in that: comprise that setting assembly, first scrapes mud assembly, second and scrape mud assembly and self-locking snap ring; This setting assembly, first scrapes that mud assembly, second is scraped the mud assembly and the self-locking snap ring is all annular;
The first lower end of scraping the upper end of mud assembly and described setting assembly is by thread connection, and the upper end thread connection of mud assembly is scraped in its lower end and second;
This second is scraped on mud assembly outer wall and is provided with annular groove and closure gasket groove, and annular groove is placed in this second lower end of scraping mud assembly outer wall;
Described self-locking card ring set is located in this annular groove, and its profile is reverse frustoconic;
Described setting assembly, first is scraped mud assembly and second and is scraped the outer wall of mud assembly and circumferentially be provided with the annular lip increased successively with axial angle, and the upper surface diameter of this annular lip is greater than its lower surface diameter.
2. well cementation as claimed in claim 1 combined type plug, it is characterized in that: the external diameter of described setting assembly is less than described first and scrapes the external diameter that mud assembly and second is scraped the mud assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206916569U CN202954780U (en) | 2012-12-14 | 2012-12-14 | Combined rubber plug for well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206916569U CN202954780U (en) | 2012-12-14 | 2012-12-14 | Combined rubber plug for well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202954780U true CN202954780U (en) | 2013-05-29 |
Family
ID=48460357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206916569U Expired - Fee Related CN202954780U (en) | 2012-12-14 | 2012-12-14 | Combined rubber plug for well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202954780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522878A (en) * | 2016-12-08 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Anti-seizing rubber plug |
| CN106555563A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | Casing recess cleans well cementing impact pressure plug |
-
2012
- 2012-12-14 CN CN2012206916569U patent/CN202954780U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106555563A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | Casing recess cleans well cementing impact pressure plug |
| CN106555563B (en) * | 2015-09-24 | 2019-09-20 | 中国石油化工股份有限公司 | Casing recess cleans well cementing impact pressure rubber plug |
| CN106522878A (en) * | 2016-12-08 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Anti-seizing 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: 20130529 Termination date: 20201214 |