CN104389551A - Bushing protection delay pressure release device - Google Patents
Bushing protection delay pressure release device Download PDFInfo
- Publication number
- CN104389551A CN104389551A CN201410561713.5A CN201410561713A CN104389551A CN 104389551 A CN104389551 A CN 104389551A CN 201410561713 A CN201410561713 A CN 201410561713A CN 104389551 A CN104389551 A CN 104389551A
- Authority
- CN
- China
- Prior art keywords
- pilot valve
- valve
- guide
- main
- main valve
- 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.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention discloses a bushing protection delay pressure release device, and mainly solves the problem of incapability of well closing pressure reduction in winter. The bushing protection delay pressure release device is characterized in that the upper end of an inlet joint (1) is connected with a main pipe (9); the upper end of the main pipe (9) is connected with an outlet joint (7); the upper end of the inlet joint (1) is connected with a pilot valve base (3); the pilot valve base (3) is communicated with the internal of the main pipe (9); the external of the upper end of the pilot valve base (3) is in sealing connection with a secondary pipe; the upper end of the pilot valve base (3) is in sliding connection with a pilot valve core (2); the upper end of the pilot valve core (2) is connected with a valve rod; the upper end of the valve rod is in sliding connection with a main valve core (5); a balance pressure cavity (4) is formed in the secondary pipe on the main valve core (5); a spring is arranged between the pilot valve core (2) and the main valve core (5); and balance holes communicated with the internals of the balance pressure cavity (4) and the secondary pipe are formed in the pilot valve core (2), the valve rod and the main valve core (5). The bushing protection delay pressure release device has the characteristics of reducing the well closing pressure reduction link before the operation and realizing stable pressure reduction before the operation.
Description
Technical field
The present invention relates to the instrument that field of oil field oil extraction water filling is used, especially casing protection time delay bleeds off pressure device.
Background technology
In field of oil field oil extraction, water injection well requires to carry out closing well step-down before job execution, just can carry out constructing operation when pressure is low to moderate below 5 MPas, the handling safety in work progress can be ensured on the one hand, the injury of abrupt pressure reduction to sleeve pipe can be reduced on the other hand.But this system cannot be performed for preventing freezing well in the winter time, and for part well for ensureing that construction speed arrangement also cannot normal closing well, therefore closing well step-down system is difficult to effectively execution.
Summary of the invention
In the winter time cannot the problem of closing well step-down in order to solve.The invention provides a kind of casing protection time delay and bleed off pressure device.This casing protection time delay bleeds off pressure device to be had and reduces closing well step-down link before operation, realizes steadily step-down before operation, ensures operation process safety, protective casing the feature extending pit shaft application life.
Technical scheme of the present invention is: this casing protection time delay bleeds off pressure device and comprises inlet union, pilot valve, guide's valve seat, equilibrium pressure chamber, main valve plug, outer cylinder body, outlet connection and electronic sensor.Inlet union upper end is connected with supervisor, supervisor upper end is connected with outer cylinder body, outer cylinder body upper end is connected with outlet connection, in supervisor, inlet union upper end is connected with guide's valve seat, guide's valve seat is connected with in supervisor, guide's valve seat upper end external seal is connected with looped pipeline, there is airtight lid looped pipeline upper end, guide's valve seat upper end slidably connects pilot valve, there is the taper seat matched with through hole on guide's valve seat pilot valve lower end, pilot valve upper end is connected with valve rod, valve rod upper end slidably connects main valve plug, main valve plug is I-shaped, main valve plug there is equilibrium pressure chamber in looped pipeline, spring is equipped with between pilot valve and main valve plug, pilot valve, valve rod and main valve plug have and the balance pipe communicated in equilibrium pressure chamber and looped pipeline, outlet connection sidewall is connected with electronic sensor.
The present invention has following beneficial effect: this casing protection time delay bleeds off pressure device and is connected with supervisor owing to adopting inlet union upper end, supervisor upper end is connected with outer cylinder body, outer cylinder body upper end is connected with outlet connection, in supervisor, inlet union upper end is connected with guide's valve seat, guide's valve seat is connected with in supervisor, guide's valve seat upper end external seal is connected with looped pipeline, there is airtight lid looped pipeline upper end, guide's valve seat upper end slidably connects pilot valve, there is the taper seat matched with through hole on guide's valve seat pilot valve lower end, pilot valve upper end is connected with valve rod, valve rod upper end slidably connects main valve plug, main valve plug is I-shaped, main valve plug there is equilibrium pressure chamber in looped pipeline, spring is equipped with between pilot valve and main valve plug, pilot valve, valve rod and main valve plug have and the balance pipe communicated in equilibrium pressure chamber and looped pipeline, outlet connection sidewall is connected with the structure of electronic sensor.Control well head blowdown presssure, realize the slow pressure release in operation anterior cannula; Electronic sensing device is installed simultaneously, the playback of recording the basic data such as vent pressure and duration information can be realized, carry out delivery receiving acceptance according to service condition, the no supervision that construction teams is bled off pressure can be realized.This casing protection time delay bleeds off pressure device and has and reduce closing well step-down link before operation thus, realizes steadily step-down before operation, ensures operation process safety, protective casing the feature extending pit shaft application life.
accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present invention.
1-inlet union in figure, 2-pilot valve, 3-guide's valve seat, 4-equilibrium pressure chamber, 5-main valve plug, 6-outer cylinder body, 7-outlet connection, 8-electronic sensor, 9-is responsible for.
detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, this casing protection time delay bleeds off pressure device and comprises inlet union 1, pilot valve 2, guide's valve seat 3, equilibrium pressure chamber 4, main valve plug 5, outer cylinder body 6, outlet connection 7 and electronic sensor 8.Inlet union 1 upper end is connected with supervisor 9, be responsible for 9 upper ends and be connected with outer cylinder body 6, outer cylinder body 6 upper end is connected with outlet connection 7, in supervisor 9, inlet union 1 upper end is connected with guide's valve seat 3, guide's valve seat 3 is connected with in supervisor 9, guide's valve seat 3 upper end external seal is connected with looped pipeline, there is airtight lid looped pipeline upper end, guide's valve seat 3 upper end slidably connects pilot valve 2, there is the taper seat matched with through hole on guide's valve seat 3 pilot valve 2 lower end, pilot valve 2 upper end is connected with valve rod, valve rod upper end slidably connects main valve plug 5, main valve plug 5 is I-shaped, main valve plug 5 there is equilibrium pressure chamber 4 in looped pipeline, spring is equipped with between pilot valve 2 and main valve plug 5, pilot valve 2, valve rod and main valve plug 5 have and the balance pipe communicated in equilibrium pressure chamber 4 and looped pipeline, outlet connection 7 sidewall is connected with electronic sensor 8.The pilot valve assembly that this casing protection time delay bleeds off pressure device can be communicated with equilibrium pressure chamber 4, earial drainage pressure under direct control well.Equilibrium pressure chamber 4 is formed and acts on main valve plug 5 and the controlled pressure of pilot valve 2 under the transmission of pilot valve 2, plays and closes the effect that pilot valve 2 opens main valve plug 5 pressure release.Main valve plug 5 is main pressure release controlling organization, plays the effect of the slow pressure release of interval.Joint is that quick clamp connection is arranged, and realizes quick despatch.Electronic sensor 8 can intuitively show the information such as pressure duration, also can realize the record and review of many data such as vent pressure and duration.
The course of work:
Before water injection well operation, this casing protection time delay is bled off pressure device and be placed in oil pipe emptying position; exit is connected with retracting device; open this casing protection time delay of emptying gate and bleed off pressure device automatic operation; slow discharge liquid carries out steady step-down; after Pressure Drop to authorized pressure, this casing protection time delay bleeds off pressure device and quits work, and can carry out normal operation to this well.Water under high pressure enters this casing protection time delay from inlet union 1 and bleeds off pressure device; equilibrium pressure chamber 4 is entered through guide's valve seat 3, pilot valve 2; drive main valve plug 5 to open after the dilatation of equilibrium pressure chamber 4, and Compress Spring increase the oppositely stressed of guide's valve seat 3, turns down high-pressure water inlet.After in ready to balance pressure chamber 4, liquid is discharged under spring force, pilot valve 2 moves to opening general orientation, and highly pressurised liquid continues pressure release.
This casing protection time delay bleeds off pressure the handling safety that device can ensure in work progress, and the slow pressure release realized in operation anterior cannula can reduce the injury of abrupt pressure reduction to sleeve pipe; When guaranteeing that winter job is constructed, closing well step-down system can be carried out smoothly; For part for ensureing that construction speed could not normal closing well, well head balance pressure relief device being installed and can realizing steady step-down, avoid because improper operation causes the hidden danger of casing failure, protective casing prolongation pit shaft application life; Electronic sensing device is installed simultaneously, the playback of recording the basic data such as vent pressure and duration information can be realized, carry out delivery receiving acceptance according to service condition, the no supervision that construction teams is bled off pressure can be realized.
Claims (1)
1. a casing protection time delay bleeds off pressure device, comprise inlet union (1), pilot valve (2), guide's valve seat (3), equilibrium pressure chamber (4), main valve plug (5), outer cylinder body (6), outlet connection (7) and electronic sensor (8), it is characterized in that: inlet union (1) upper end is connected with supervisor (9), supervisor (9) upper end is connected with outer cylinder body (6), outer cylinder body (6) upper end is connected with outlet connection (7), supervisor (9) interior inlet union (1) upper end is connected with guide's valve seat (3), guide's valve seat (3) is connected with in supervisor (9), guide's valve seat (3) upper end external seal is connected with looped pipeline, there is airtight lid looped pipeline upper end, guide's valve seat (3) upper end slidably connects pilot valve (2), there is the taper seat that upper through hole matches with guide's valve seat (3) pilot valve (2) lower end, pilot valve (2) upper end is connected with valve rod, valve rod upper end slidably connects main valve plug (5), main valve plug (5) is for I-shaped, equilibrium pressure chamber (4) is had in the upper looped pipeline of main valve plug (5), spring is equipped with between pilot valve (2) and main valve plug (5), pilot valve (2), valve rod and main valve plug (5) have and the balance pipe communicated in equilibrium pressure chamber (4) and looped pipeline, outlet connection (7) sidewall is connected with electronic sensor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561713.5A CN104389551B (en) | 2014-10-21 | Casing protection time delay bleeds off pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561713.5A CN104389551B (en) | 2014-10-21 | Casing protection time delay bleeds off pressure device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104389551A true CN104389551A (en) | 2015-03-04 |
| CN104389551B CN104389551B (en) | 2017-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441744A (en) * | 2020-05-08 | 2020-07-24 | 中国石油天然气集团有限公司 | High-pressure energy-storage pressure-relief starting type pressure control valve and using method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441744A (en) * | 2020-05-08 | 2020-07-24 | 中国石油天然气集团有限公司 | High-pressure energy-storage pressure-relief starting type pressure control valve and using method |
| CN111441744B (en) * | 2020-05-08 | 2023-11-14 | 中国石油天然气集团有限公司 | High-pressure energy storage and pressure release start type pressure control valve and use method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20170104 Termination date: 20211021 |