CN202132017U - Full bore check valve - Google Patents
Full bore check valve Download PDFInfo
- Publication number
- CN202132017U CN202132017U CN201120184489U CN201120184489U CN202132017U CN 202132017 U CN202132017 U CN 202132017U CN 201120184489 U CN201120184489 U CN 201120184489U CN 201120184489 U CN201120184489 U CN 201120184489U CN 202132017 U CN202132017 U CN 202132017U
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- flap valve
- inner sliding
- outer sleeve
- overcoat
- 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 - Lifetime
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Abstract
The utility model discloses a full bore check valve, which belongs to the field of check valves, and includes an upper joint and a lower joint, wherein the lower end of the upper joint is fixedly connected to the inner side of the upper end of the lower joint; an outer sleeve is sleeved in the lower joint; a sealing baffle plate is movably connected at the lower end of the outer sleeve; an inner sliding sleeve is sleeved in the outer sleeve; the inner diameter of the outer sleeve is identical with that of a step hole of the lower joint; and the inner sliding sleeve can vertically move in the outer sleeve and the lower joint. The full bore check valve has a simple structure, is convenient to use, solves the problems that the conventional drilling tool check valve has small flow area, and the solid interior thereof can't be mounted with an instrument and a special tool, can prevent slurry from being ejected from the drilling tool water hole, protect a fire hose against the destruction of stratum high pressure, plays the functions of saving slurry, keeping drill floor clean and reducing environmental pollution, can avoid disastrous blowout accident, and satisfies requirements of market and production field.
Description
Technical field
The utility model relates to a kind of flap valve, particularly a kind of flap valve that prevents gas blowout accident.
Background technology
At present, in the each task of oil exploration and oil field development, drilling well plays crucial effect, but in the engineering of creeping into, runs into phenomenons such as well kick, blowout through regular meeting.When strata pressure surpasses the mud liquid column hydrostatic pressure; Strata pressure promotes mud probably along the upwards ejection of drill string hydrophthalmia, and hose may be sprained badly because of high pressure, and serious gas blowout accident takes place probably; Need this moment a large amount of mud to carry out supercharging; Make rig floor become in disorder, and the ejection of the oil of down-hole, the pollution of environment caused.
When finding well kick, blowout sign, rapidly and efficiently carry out closing well and kill job is the important assurance that effectively reduces gas blowout accident.And the flap valve that is installed on the drill string is the effective tool of blowout prevention in the drilling rod.Conventional in the past drilling tool flap valve comprises flechette-type flap valve, ball check valve, drop-in check valve, butterfly shaped check valve etc.; In these flap valve; The hydrophthalmia middle part can not be hidden in the valve body for the spool part; The spool part can stop through the downhole instrument in it, instrument etc., can only pass through mud, liquid and particulate etc.
Existing flap valve can not adapt to the requirement of drilling safety; Need a new flap valve of design; Can prevent that mud from spraying from the drilling tool hydrophthalmia; The protection hose does not receive the destruction of stratum high pressure, and plays and practice thrift mud, maintenance rig floor cleaning, minimizing less environmental contamination, the most important thing is can avoid taking place serious gas blowout accident.
The utility model content
The goal of the invention of the utility model is: to the problem of above-mentioned existence; Provide a kind of simple in structure, easy to use, it is little to have solved drilling tool flap valve area of passage, and inner is the solid all-pass footpath flap valve that can not be lowered to the problem of instrument, special tool(s) etc.; And adopt this all-pass footpath flap valve; Can prevent that mud from spraying from the drilling tool hydrophthalmia, the protection hose does not receive the destruction of stratum high pressure, and plays and practice thrift mud, maintenance rig floor cleaning, minimizing less environmental contamination; Can avoid serious gas blowout accident takes place, satisfy market and production scene demand.
The technical scheme that the utility model adopts is following:
The all-pass footpath flap valve of the utility model; Comprise top connection and lower contact, the lower end of said top connection is fixedly connected on the inboard, upper end of lower contact, is with overcoat in the said lower contact; The lower end of said overcoat is connected with sealing plate; Be set with inner sliding sleeve in the said overcoat, the internal diameter of said overcoat is identical with the internal diameter of the stepped hole of lower contact, moves up and down but make in inner sliding sleeve its external sleeve and the lower contact.
Owing to adopted said structure, the all-pass footpath flap valve of the utility model is compared with traditional flap valve; Its hydrophthalmia is bigger, and sealing plate can be hidden in the valve pocket when opening; With no any obstruction in common drilling rod, drill collar, the same hydrophthalmia of tool joint; So be called the full aperture flap valve, can in its hydrophthalmia, be lowered to various instruments, accident treatment instrument, long fibre leak stopping mud etc.And valve inside is provided with sliding sleeve, can control the switch of flap valve through spillway discharge in the well, and the spillway discharge that can satisfy customer requirements according to latus rectum in the viscosity of fluid and the flow design sliding sleeve promotes to move on the sliding sleeve to close flap valve.The all-pass footpath flap valve of the utility model; Simple in structure, easy to use, it is little to have solved drilling tool flap valve area of passage, and inside can prevent that for the solid problem that can not be lowered to instrument, special tool(s) etc. mud from spraying from the drilling tool hydrophthalmia; The destruction that the protection hose does not receive the stratum high pressure; And play and practice thrift mud, maintenance rig floor cleaning, minimizing less environmental contamination, can avoid serious gas blowout accident takes place, satisfy market and production scene demand.
The all-pass of the utility model footpath flap valve, the inside of said inner sliding sleeve is through hole, and the upper end diameter of inner sliding sleeve interior bone is less than lower end diameter, but moves up and down in inner sliding sleeve its external sleeve and the top connection.
Owing to adopted said structure, when strata pressure surpassed the mud liquid column hydrostatic pressure, fluid upwards impacted; Because the upper end diameter of inner sliding sleeve interior bone is less than lower end diameter, the slight part of upper-end inner diameter receives the impact of bigger power, upwards moves in meeting its external sleeve and the top connection; Stop to move when moving to top connection shoulder place; Sealing plate is closed automatically, prevents upwards ejection of borehole fluid, plays the non-return effect.
The all-pass footpath flap valve of the utility model flexibly connects through torsion spring between said sealing plate and the overcoat.
Owing to adopted said structure, flexibly connect through torsion spring between sealing plate and the overcoat, can being closed under the effect of torsion spring elastic force automatically outside, sealing plate put and form sealing through self elastic force of torsion spring, prevent that borehole fluid from upwards spraying, and plays the non-return effect.
The all-pass footpath flap valve of the utility model, when upwards moving in said inner sliding sleeve its external sleeve and the top connection, said sealing plate is under the effect of torsion spring, and fit and seal in the lower surface of sealing plate and overcoat.
Owing to adopted said structure, moving on the inner sliding sleeve under the spillway discharge that requires, stop to move when moving to top connection shoulder place, put outside sealing plate is closed under the effect of torsion spring elastic force automatically and form sealing, prevent upwards ejection of borehole fluid, play the non-return effect.Sealing plate is in the enable possition during operate as normal, and various downhole instruments, accident treatment instrument, long fibre leak stopping mud etc. all can or reclaim under lower going-into-well in the hydrophthalmia.
In sum, owing to adopted technique scheme, the beneficial effect of the utility model is:
1. the all-pass of the utility model footpath flap valve, simple in structure, easy to use, it is little to have solved drilling tool flap valve area of passage, innerly is the solid problem that can not be lowered to instrument, special tool(s) etc.;
2. the all-pass of the utility model footpath flap valve; Can prevent that mud from spraying from the drilling tool hydrophthalmia; The destruction that the protection hose does not receive the stratum high pressure; And play and practice thrift mud, maintenance rig floor cleaning, minimizing less environmental contamination, can avoid serious gas blowout accident takes place, satisfy market and production scene demand;
3. the all-pass of the utility model footpath flap valve, installation and removal are very convenient, reduced maintenance cost.
Description of drawings
Fig. 1 is the structural scheme of mechanism of the all-pass footpath flap valve of the utility model.
Mark among the figure: 1-top connection, 2-overcoat, 3-inner sliding sleeve, 4-sealing plate, 5-O RunddichtringO, 6-torsion spring, 7-lower contact, 8-stepped hole.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The all-pass footpath flap valve of the utility model, as shown in Figure 1, the left of flap valve is the upper end; Right-hand is the lower end, and this all-pass footpath flap valve comprises top connection 1 and lower contact 7; The lower end of said top connection 1 is fixedly connected on the inboard, upper end of lower contact 7, and through O RunddichtringO 5 sealing and fixing, is with overcoat 2 in the said lower contact 7; And through O RunddichtringO 5 sealing and fixing, the lower end of said overcoat 2 is connected with sealing plate 4 through torsion spring 6, is set with inner sliding sleeve 3 in the said overcoat 2 between the inwall of overcoat 2 and lower contact 7; The inside of said inner sliding sleeve 3 is through hole; And the upper end diameter of inner sliding sleeve 3 interior bone is less than lower end diameter, and the internal diameter of said overcoat 2 is identical with the internal diameter of the stepped hole 8 of lower contact 7, but moves up and down in inner sliding sleeve 3 its external sleeve 2 and the lower contact 7.When this all-pass footpath flap valve; When being in normal use; Sealing plate 4 is positioned at the side of inner sliding sleeve 3, makes no any obstruction in this flap valve and common drilling rod, drill collar, the same hydrophthalmia of tool joint, so be called the full aperture flap valve; Can in its hydrophthalmia, be lowered to various instruments, accident treatment instrument, long fibre leak stopping mud etc.When strata pressure surpassed the mud liquid column hydrostatic pressure, fluid upwards impacted, because the upper end diameter of inner sliding sleeve 3 interior bone is less than lower end diameter; The part that upper-end inner diameter is little receives the impact of bigger power, can its external sleeve 2 move with top connection 1 interior making progress, when the shoulder place that moves to top connection 1 stops to move; Sealing plate 4 is under the effect of torsion spring 6; Seal and close automatically with the lower surface applying of overcoat 2, prevent upwards ejection of borehole fluid, play the non-return effect.
The all-pass of the utility model footpath flap valve can be controlled the switch of flap valve through spillway discharge in the well, and the spillway discharge that can satisfy customer requirements according to latus rectum in the viscosity of fluid and the flow design sliding sleeve promotes to move on the sliding sleeve to close flap valve.
The all-pass footpath flap valve of the utility model, simple in structure, easy to use, it is little to have solved drilling tool flap valve area of passage, and inner is the solid problem that can not be lowered to instrument, special tool(s) etc.; Can prevent that mud from spraying from the drilling tool hydrophthalmia, the protection hose does not receive the destruction of stratum high pressure, and plays and practice thrift mud, maintenance rig floor cleaning, minimizing less environmental contamination, can avoid serious gas blowout accident takes place, and satisfies market and production scene demand; Installation and removal are very convenient, reduced maintenance cost.
The all-pass footpath flap valve of the utility model; Meet " catalogue (basis in 2005) is instructed in the national industry structural adjustment " and encourage class, the 6th type " oil, natural gas " the 5th " improving oil gas field recovery ratio, production safety safeguards technique and design, eco-environment restoration and prevention and cure of pollution engineering development and application "; Be beneficial to and apply.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (4)
1. all-pass footpath flap valve; It is characterized in that: it comprises top connection (1) and lower contact (7); The lower end of said top connection (1) is fixedly connected on the inboard, upper end of lower contact (7); Be with overcoat (2) in the said lower contact (7), the lower end of said overcoat (2) is connected with sealing plate (4), is set with inner sliding sleeve (3) in the said overcoat (2); The internal diameter of said overcoat (2) is identical with the internal diameter of the stepped hole (8) of lower contact (7), make inner sliding sleeve (3) but move up and down in its external sleeve (2) and the lower contact (7).
2. all-pass as claimed in claim 1 footpath flap valve; It is characterized in that: the inside of said inner sliding sleeve (3) is through hole; And the upper end diameter of inner sliding sleeve (3) interior bone is less than lower end diameter, inner sliding sleeve (3) but move up and down in its external sleeve (2) and the top connection (1).
3. according to claim 1 or claim 2 all-pass footpath flap valve is characterized in that: between said sealing plate (4) and the overcoat (2) through torsion spring (6) flexible connection.
4. all-pass as claimed in claim 3 footpath flap valve; It is characterized in that: when upwards moving in said inner sliding sleeve (3) its external sleeve (2) and the top connection (1); Said sealing plate (4) is under the effect of torsion spring (6), and sealing plate (4) is fitted with the lower surface of overcoat (2) and sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120184489U CN202132017U (en) | 2011-06-02 | 2011-06-02 | Full bore check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120184489U CN202132017U (en) | 2011-06-02 | 2011-06-02 | Full bore check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132017U true CN202132017U (en) | 2012-02-01 |
Family
ID=45520790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120184489U Expired - Lifetime CN202132017U (en) | 2011-06-02 | 2011-06-02 | Full bore check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202132017U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302574A (en) * | 2020-12-04 | 2021-02-02 | 西南石油大学 | Large-drift-diameter blowout-preventing back-pressure valve in hinge type drill column |
-
2011
- 2011-06-02 CN CN201120184489U patent/CN202132017U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302574A (en) * | 2020-12-04 | 2021-02-02 | 西南石油大学 | Large-drift-diameter blowout-preventing back-pressure valve in hinge type drill column |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |