CN202954783U - Novel check valve for well cementation - Google Patents
Novel check valve for well cementation Download PDFInfo
- Publication number
- CN202954783U CN202954783U CN 201220518953 CN201220518953U CN202954783U CN 202954783 U CN202954783 U CN 202954783U CN 201220518953 CN201220518953 CN 201220518953 CN 201220518953 U CN201220518953 U CN 201220518953U CN 202954783 U CN202954783 U CN 202954783U
- Authority
- CN
- China
- Prior art keywords
- valve
- guide rod
- spool
- well cementation
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a novel check valve for well cementation. The novel check valve is formed by an upper valve body, a lower valve base, a valve plug and a spring. The upper valve body is a horn-shaped drum body, and the inner wall hole transits in big-to-small slanting mode to form a sealing conical hole. A rubber sealing layer is arranged on the outer surface of the head portion of the valve plug, and the edge of the rubber sealing layer is vulcanized to from an opened fill-shaped rubber annular sealing tape. The spring is sleeved on a guide rod disposed at the lower end of the valve plug, and the valve plug and the sealing conical hole form a sealing structure under driving of the spring. The guide rod disposed at the lower end of the valve plug is conical, the lower end of the guide rod is arranged in a positioning hole of the lower valve base, and a tapered sealing base formed through transition of a spring base is arranged on the upper portion of the positioning hole. The novel check valve has the advantages that the check valve is corrosion resistant and good in sealing performance, and the head portion can reset and drill easily when the valve plug works.
Description
Technical field
The utility model relates to reinforcing oil well construction casing annex.
Background technology
Float collar float plug is requisite casing hardware in the petroleum engineering cementing operation, and well cementation is the decisive parts of float collar float plug with single flow valve, can reset be the major criterion of estimating the float collar float plug quality with the spool of single flow valve in well cementation after the cementing, to preventing mud refluence and cementing quality after the cementing important effect arranged.The well cementation single flow valve of existing float collar float plug, valve body is not corrosion-resistant, its poor sealing, the guide rod of spool is that staight shank and lower valve base locating hole gap are even, can't be resetted by impurity is stuck easily; Remove with rear difficult brill, affect operating speed.
The utility model content
The utility model provides that a kind of valve core reset is good, corrosion-resistant, good airproof performance, the float collar float plug that removes with rear easy brill be with the well cementation single flow valve.
The utility model is made of upper valve body, lower valve base, spool and spring.Described upper valve body is horn-like barrel-shaped body, the sealing taper hole of inner wall hole for tilting; The shape of spool and upper valve body inner wall hole is complementary, and spool head external surface is provided with rubber sealant, and spool edge is the fish gill shape rubber annular band that opens; Spring housing promotes bottom spool at back-moving spring and forms hermetically-sealed construction with the sealing taper hole on the guide rod of spool lower end; The guide rod of spool lower end is pyramid type, and lower end of the guide rod is contained in the locating hole of lower valve base, and locating hole top is provided with cone bucket type seal receptacle.
Beneficial effect
The utility model upper valve body is horn-like barrel-shaped body, and the descending angled transition of inner wall hole forms the sealing taper hole, guarantees not hinder in the valve core reset process; Spool head vulcanized rubber and joint ring have guaranteed the reliable of sealing; The spool guide rod is designed to taper shape, makes itself and lower valve base locating hole form variable gap, and in the valve core reset seal process, the gap is increasing, makes difficult retention of impurity block guide rod; The spool pressurized is seated on the seal receptacle of lower valve base, and mud is near minimum by the possibility of locating hole, further reduces impurity and blocks guide rod, guarantees that spool normally resets.
Description of drawings
Accompanying drawing 1 is the schematic diagram of the utility model well cementation with single flow valve;
The specific embodiment
Single flow valve is used in well cementation, and it is made of upper valve body 1, spool 2, spring 3, lower valve base 4, it is characterized in that: upper valve body 1 is horn-like barrel-shaped body, and the descending angled transition of inner wall hole forms the sealing taper hole; Spool 2 head external surfaces are provided with rubber sealant 5, and the edge is sulfided into the fish gill shape rubber annular band 6 that opens; Spring 3 is enclosed within above the guide rod of spool 2 lower ends, promotes bottom spool 2 at spring 3 and forms hermetically-sealed construction with the sealing taper hole; The guide rod of spool 2 lower ends is pyramid type, and lower end of the guide rod is contained in the locating hole of lower valve base, and locating hole top is provided with the cone bucket type seal receptacle 7 that forms via the spring base transition.The material of upper valve body, spool, lower valve base is engineering plastics.
Claims (5)
1. a well cementation single flow valve comprises upper valve body, lower valve base, spool and spring, it is characterized in that, described upper valve body is horn-like barrel-shaped body, the sealing taper hole of inner wall hole for tilting; The shape of spool and upper valve body inner wall hole is complementary, and spring housing is on the guide rod of spool lower end, and lower end of the guide rod is arranged in the locating hole of lower valve base.
2. a kind of well cementation single flow valve according to claim 1 is characterized in that described locating hole top is provided with cone bucket type seal receptacle.
3. a kind of well cementation single flow valve according to claim 1 is characterized in that described spool head external surface is provided with rubber sealant.
4. according to claim 1 or 3 described a kind of well cementation single flow valves, it is characterized in that described spool edge is the fish gill shape rubber annular band that opens.
5. according to claim 1 or 3 described a kind of well cementation single flow valves, the guide rod that it is characterized in that described spool lower end is pyramid type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518953 CN202954783U (en) | 2012-10-11 | 2012-10-11 | Novel check valve for well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518953 CN202954783U (en) | 2012-10-11 | 2012-10-11 | Novel check valve for well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202954783U true CN202954783U (en) | 2013-05-29 |
Family
ID=48460360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220518953 Expired - Fee Related CN202954783U (en) | 2012-10-11 | 2012-10-11 | Novel check valve for well cementation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202954783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167525A (en) * | 2017-12-11 | 2018-06-15 | 安徽银龙泵阀股份有限公司 | A kind of heatproof corrosion resistant spool and its manufacture craft |
-
2012
- 2012-10-11 CN CN 201220518953 patent/CN202954783U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167525A (en) * | 2017-12-11 | 2018-06-15 | 安徽银龙泵阀股份有限公司 | A kind of heatproof corrosion resistant spool and its manufacture craft |
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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 |
Granted publication date: 20130529 Termination date: 20151011 |
|
| EXPY | Termination of patent right or utility model |