CN104847306B - A kind of underground rod tube safety valve - Google Patents
A kind of underground rod tube safety valve Download PDFInfo
- Publication number
- CN104847306B CN104847306B CN201510164807.3A CN201510164807A CN104847306B CN 104847306 B CN104847306 B CN 104847306B CN 201510164807 A CN201510164807 A CN 201510164807A CN 104847306 B CN104847306 B CN 104847306B
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- inwall
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- 239000003292 glue Substances 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000003129 oil well Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000002929 anti-fatigue Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 24
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 208000002740 Muscle Rigidity Diseases 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101100293261 Mus musculus Naa15 gene Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of underground rod tube safety valve that artificial lift is driven for bar, its top connection and upper valve body screwed connection, upper valve body and lower valve body screwed connection, lower valve body and lower contact screwed connection, upper valve body outer wall is provided with boss, screwed hole is provided with boss, screwed hole is connected with control pipe joint, upper valve body inwall is cased with piston, stage clip is cased with piston, back-moving spring, central tube, piston outer wall and upper valve body top, upper valve body lower seal, piston inner wall and center pipe outer wall top, center pipe outer wall lower seal, piston is fixedly connected with spherical glue core sealing group, spherical glue core seal assembly is promoted to be moved along the upper valve body upper spherical inwall to turn off or on sucker rod and oil pipe annular space.Oil field is not influenceed during unlatching normally to produce, annulus access between sucker rod and oil pipe can be closed during closing.The present invention solves the problems, such as that bar drive artificial lift can not tripping in safety valve.
Description
Technical field
The present invention relates to a kind of underground rod tube safety valve that artificial lift is driven for bar.
Background technology
Environmental protection and safety in production are increasingly paid attention in countries in the world, and safety in production of many countries to Oil/gas Well has in detail
Thin laws and regulations, emphasize that blowing or excessive may occur positioned at densely populated areas, Important Economic area, ocean and inland waters
Oil/gas Well storm valve must be all installed.At sea in the production in oil field, in order to ensure the safety of production, require in well
Lower tripping in safety valve, in something unexpected happened, well head control failure, the oil discharge passage of oil pipe to be closed in underground, protected
Demonstrate,prove the safety of platform.At present, the Oil/gas Well that there is blowing ability at domestic sea is fitted with storm valve, and onshore oil field is also more next
Storm valve is used more in Oil/gas Well.
In the production of current offshore oilfield, used safety valve is only applicable to flowing well and electric immersible pump well, Zhi Nengguan
Oil pipe passage is closed, for the safety valve or blank for thering is the bar of sucker rod to drive artificially lifted well in oil pipe.Existing technology can not
Meet that the bar of offshore oilfield drives artificial lift safety in production needs, lack a kind of underground rod tube safety valve, it can close oil pipe
Inside there is the underground passage of sucker rod.
The content of the invention
The purpose of the present invention is：In order to solve the problems, such as bar drive artificial lift system can not tripping in safety valve, change tradition
Piston cylinder operator or link mandrel structure adjusting valve plate open and close, realize that pole is close using spherical glue core seal assembly
Envelope or zero envelope function, spy provide a kind of underground rod tube safety valve that artificially lifted well is driven available for bar.
To reach above-mentioned purpose, the present invention uses following technical scheme：A kind of underground rod tube safety valve, is by control pipe
Line, top connection, upper valve body, spherical glue core seal assembly, sealing ring, control pipe joint, back-moving spring, piston, central tube, under
Valve body, stage clip, lower contact composition；Its architectural feature is：Top connection upper end is provided with box, is connected with oil pipe, under top connection
End is provided with box, is connected with upper valve body, upper valve body is a cylindrical tube, and upper valve body lower end is provided with pin thread, with lower valve body
Connection, upper valve body outer wall are provided with boss, screwed hole are provided with upper valve body outer wall boss, screwed hole is with controlling pipe joint phase
Connection, control pipe joint are connected with control pipeline, and upper valve body upper inside wall is provided with step, and it is up can to limit central tube
Journey, upper valve body upper inside wall step are arranged with spherical inner wall, and upper valve body spherical inner wall contacts with spherical glue core seal assembly, ball
Shape glue core seal assembly can slide along upper valve body spherical inner wall, be provided with step in the middle part of upper valve body inwall, be provided with upper valve body
Through hole, through hole one end connect the screwed hole on upper valve body outer wall boss, other end connection upper valve body inwall, another end opening of through hole
Under upper valve body inwall middle bench, upper valve intracoelomic cavity is cased with piston, between upper valve body upper inside wall and piston outer wall top
Gap coordinates, and piston outer wall top is provided with annular groove, lays sealing ring, and upper valve body inner wall lower is matched somebody with somebody with piston outer wall underclearance
Close, piston outer wall bottom is provided with annular groove, lays sealing ring, piston is a cylindrical tube, can be slided along upper valve body inwall, piston
Upper end is fixedly connected with spherical glue core seal assembly, is provided with step in the middle part of piston outer wall, piston outer wall middle bench height with
Upper valve body inwall middle bench is highly equal, and piston outer wall middle bench is located under upper valve body inwall middle bench, outside piston
Wall middle bench and upper valve body inwall middle bench, piston outer wall, upper valve body inwall form annulus post chamber, annulus post chamber with
Upper valve body inner via hole communicates, and piston inner wall upper end is provided with boss, and boss is arranged with back-moving spring, and back-moving spring is enclosed on piston
Interior, piston inner wall bottom is provided with boss, and boss is arranged with stage clip, and boss coordinates with center pipe outer wall gap, boss inwall
Annular groove is provided with, lays sealing ring, through hole, through hole one end connection piston outer wall middle bench and upper valve body are provided with piston barrel
The annulus post chamber that inwall middle bench, piston outer wall, upper valve body inwall are formed, through hole other end connection piston inner wall, through hole
For another end opening in piston inner wall lower boss upper end, central tube is a cylindrical tube, and boss is provided with the middle part of the pipe outer wall of center,
Support back-moving spring lower end on boss in the middle part of the pipe outer wall of center, center pipe outer wall middle part boss height and piston inner wall lower boss
Highly equal, boss coordinates with piston inner wall gap in the middle part of the pipe outer wall of center, and boss is provided with annular groove in the middle part of the pipe outer wall of center, pacifies
Sealing ring is put, boss forms annulus post chamber with piston inner wall lower boss, piston inner wall, center pipe outer wall in the middle part of the pipe outer wall of center
Room, annulus post chamber communicate with the through hole on piston barrel, and lower valve body inwall is provided with two steps, upper step support pressure
Spring, and downstroke can be limited, lower step can limit central tube down stroke, between lower valve body inwall and center pipe outer wall lower end
Gap coordinates, and lower valve body inwall is provided with annular groove, lays sealing ring, and lower valve body lower end is provided with pin thread, is connected with lower contact, lower end
Pin thread is provided with, is connected with oil pipe.
The beneficial effects of the invention are as follows：(1) intrinsic safety full valve can close the underground passage of annular space between sucker rod and oil pipe,
Solve the problems, such as that marine bar drive artificial lift can not tripping in safety valve.(2) when the safety valve is opened larger inside can be formed to lead to
Footpath, the normal work of underground sucker rod is not influenceed.(3) during the safe valve closure, pole sealing or zero envelope function can be achieved.(4)
The safety valve uses hydraulic driving mode, and underground controls simple and reliable.
Brief description of the drawings
Fig. 1 is working state schematic representation when a kind of underground rod tube safety valve of the present invention is shunt in a well；
Fig. 2 is working state schematic representation when a kind of underground rod tube safety valve of the present invention recovers the oil；
Fig. 3 is partial enlarged drawing when a kind of underground rod tube safety valve of the present invention is shunt in a well；
Fig. 4 is partial enlarged drawing when a kind of underground rod tube safety valve of the present invention recovers the oil；
Fig. 5 is spherical glue core seal assembly diagrammatic cross-section when a kind of underground rod tube safety valve of the present invention is shunt in a well；
Fig. 6 is spherical glue core seal assembly diagrammatic cross-section when a kind of underground rod tube safety valve of the present invention recovers the oil；
Fig. 7 is spherical glue core seal assembly outside drawing；
In figure：1. control pipeline, 2. top connections, 3. upper valve bodies, 4. spherical glue core seal assemblies, 5. sealing rings, 6. controls
Pipe joint, 7. back-moving springs, 8. pistons, 9. central tubes, 10. sealing rings, 11. sealing rings, 12. sealing rings, 13. lower valve bodies,
14. stage clip, 15. sealing rings, 16. lower contacts, 17. rubber seals, 18. elastic skeletons
Embodiment
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of underground rod tube safety valve of the present invention, including control pipeline 1, top connection 2,
Upper valve body 3, spherical glue core seal assembly 4, sealing ring 5, control pipe joint 6, back-moving spring 7, piston 8, central tube 9, sealing
Circle 10, sealing ring 11, sealing ring 12, lower valve body 13, stage clip 14, sealing ring 15, lower contact 16；Its architectural feature is：Top connection 2
Upper end is provided with box, is connected with oil pipe, and the lower end of top connection 2 is provided with box, is connected with upper valve body 3, and upper valve body 3 is one
Cylindrical tube, the lower end of upper valve body 3 are provided with pin thread, are connected with lower valve body 13, and the outer wall of upper valve body 3 is provided with boss, outside upper valve body 3
Screwed hole is provided with wall boss, screwed hole is connected with control pipe joint 6, and control pipe joint 6 is connected with control pipeline 1
Connect, the upper inside wall of upper valve body 3 is provided with step 3a, can limit the up stroke of central tube 9, and the upper inside wall step 3a of upper valve body 3 is divided into
Spherical inner wall is equipped with, the spherical inner wall of upper valve body 3 contacts with spherical glue core seal assembly 4, and spherical glue core seal assembly 4 can be along upper valve
The spherical inner wall of body 3 is slided, and is provided with step 3c in the middle part of the inwall of upper valve body 3, through hole 3b, through hole 3b one end are provided with upper valve body 3
Connection control pipe joint 6, the other end connection inwall of upper valve body 3, another end openings of through hole 3b are located at platform in the middle part of the inwall of upper valve body 3
Under rank 3c, the inner chamber of upper valve body 3 is cased with piston 8, and the upper inside wall of upper valve body 3 coordinates with the outer wall upper gap of piston 8, outside piston 8
Wall top is provided with annular groove, lays sealing ring 5, and the inner wall lower of upper valve body 3 coordinates with the outer wall underclearance of piston 8, the outer wall of piston 8
Bottom is provided with annular groove, lays sealing ring 11, and piston 8 be a cylindrical tube, can be slided along the inwall of upper valve body 3, the upper end of piston 8 and
Spherical glue core seal assembly 4 is fixedly connected, and is provided with step 8b in the middle part of the outer wall of piston 8, the outer wall middle bench 8b of piston 8 height with
The inwall middle bench 3c of upper valve body 3 is highly equal, the outer wall middle bench 8b of piston 8 be located at the inwall middle bench 3c of upper valve body 3 it
Under, the outer wall middle bench 8b of the piston 8 and inwall middle bench 3c of upper valve body 3, the outer wall of piston 8, the inwall of upper valve body 3 form annulus post
Chamber 3d, annulus post chamber 3d communicate with the inner via hole 3b of upper valve body 3, and the inwall upper end of piston 8 is provided with boss, and boss is arranged with
Back-moving spring 7, back-moving spring 7 are enclosed in piston 8, and the inner wall lower of piston 8 is provided with boss 8d, and boss 8d is arranged with stage clip
14, boss 8d and the outer wall gap of central tube 9 coordinate, and boss 8d inwalls are provided with annular groove, lay sealing ring 12, on the barrel of piston 8
Through hole 8a is provided with, outside the through hole 8a one end connection outer wall middle bench 8b of piston 8 and inwall middle bench 3c of upper valve body 3, piston 8
Annulus post chamber 3d, through hole the 8a other end connection inwall of piston 8 that wall, the inwall of upper valve body 3 are formed, another end openings of through hole 8a exist
The inner wall lower boss 8d upper ends of piston 8, central tube 9 are a cylindrical tube, and boss, central tube 9 are provided with the middle part of the outer wall of central tube 9
The lower end of support back-moving spring 7 on boss in the middle part of outer wall, the outer wall of central tube 9 middle part boss height and the inner wall lower boss 8d of piston 8
Highly equal, boss coordinates with the inwall gap of piston 8 in the middle part of the outer wall of central tube 9, and boss is provided with annular in the middle part of the outer wall of central tube 9
Groove, lay sealing ring 10, in the middle part of the outer wall of central tube 9 boss with outside the inner wall lower boss 8d of piston 8, the inwall of piston 8, central tube 9
Wall forms annulus post chamber 8c, and annulus post chamber 8c communicates with the through hole 8a on the barrel of piston 8, and the inwall of lower valve body 13 is provided with two
Individual step, upper step 13a supports stage clip 14, and the down stroke of piston 8 can be limited, it is descending that lower step 13b can limit central tube 9
Journey, the inwall of lower valve body 13 coordinate with the outer wall lower gap of central tube 9, and the inwall of lower valve body 13 is provided with annular groove, lay sealing ring 15,
The lower end of lower valve body 13 is provided with pin thread, is connected with lower contact 16, and the lower end of lower contact 16 is provided with pin thread, is connected with oil pipe.
As shown in Figure 2 and Figure 4, a kind of underground rod tube safety valve of the present invention is controlled in pipeline 1 and led to when oil well normally produces
There is hydraulic oil, hydraulic oil enters upper valve body 3 along control pipeline 1, then enters annulus post chamber 3d along through hole 3b, enters back into piston
8 inner via hole 8a, annulus post chamber 8c is finally entered, piston 8 is come downwards on the upper inside wall step 13a of lower valve body 13, and central tube 9 supports
Shape of kicking off glue core seal assembly 4, goes upward to the upper inside wall step 3a of upper valve body 3, and spherical glue core seal assembly 4 does not play sealing and made
With safety valve central tube penetrates, and ensures the normal oil discharge passage of oil well production.
As shown in figures 1 and 3, a kind of underground rod tube safety valve of the present invention controls the release of pipeline 1, central tube in shut-in well
Under the effect of back-moving spring elastic force, lower valve body inner wall lower step 13b is gone downwards to, piston 8 is upward under the effect of the elastic force of stage clip 14
It is mobile, promote the spherical locking sucker rod of glue core seal assembly 4, the oil discharge passage closing between R a T, ensure oil field
Production safety.
As shown in Fig. 5, Fig. 6, Fig. 7, a kind of spherical glue core seal assembly 4 of underground rod tube safety valve of the present invention is close by rubber
Sealing 17, elastic skeleton 18 combine, and the spherical lower end of glue core seal assembly 4 is an annulus post, and upper end is by 12 glue cores edge circles
360 degree of circumferential direction is uniform, and the spherical outside wall surface of glue core seal assembly 4 is sphere.
A kind of operation principle of underground rod tube safety valve of the present invention is：The present invention is connected on oil pipe, it is lower to design position
Put, then by other instruments decentralization completion in place, the general lower position to underground 200-300 rice connects control pipeline, and with
Control head is connected；When a kind of underground rod tube safety valve of the present invention need to be opened, control in pipeline 1 and be connected with hydraulic oil, piston
By hydraulic coupling downward caused by two annulus post chambers 3b, 8c, stage clip 14 and the upward elastic force of back-moving spring 7, central tube 9
Outer wall is more than to frictional force upward caused by piston 8, the inwall of upper valve body 3 to frictional force upward caused by piston 8, hydraulic coupling
Spring force and friction sum, piston 8 move downward, and central tube 9 is by the upward bullet of upward hydraulic coupling, back-moving spring 7
Power, piston 8 are more than spring force and friction sum to frictional force caused by the outer wall of central tube 9, hydraulic coupling, and central tube 9 is upward
Motion, back-moving spring 7 ratio of rigidity stage clip, 14 rigidity are big, and piston 8 first comes downwards to stroke end, i.e., the support of piston 8 is in lower valve body 13
On inwall step 13a, central tube 9 continues up, struts spherical glue core seal assembly 4, is up to stroke end, i.e. upper valve body 3
At inwall step 3a, spherical glue core seal assembly 4 is expanded to outside central tube 9, the insertion of safety valve central tube, spherical glue core sealing group
Part 4 does not seal, and ensures the normal oil discharge passage of oil well production；A kind of underground rod tube safety valve of the present invention meets emergency
When need to close, from ground cut-out pressure, the release of pipeline 1 is controlled, central tube 9 is by the downward elastic force of back-moving spring 7, spherical glue core
The upward frictional force of downward frictional force, the inwall of lower valve body 13 caused by seal assembly 4, the downward elastic force of back-moving spring 7 be more than to
On frictional force sum total, central tube 9 goes downwards to stroke end, i.e. the support of central tube 9 is living on the inwall step 13b of lower valve body 13
Plug 8 is acted on spherical glue core by downward frictional force, central tube 9 caused by the upward elastic force of stage clip 14, the inwall of upper valve body 3 and sealed
The frictional force of component 4,14 upward elastic force of stage clip are more than downward friction sum, and piston 8 is up, drives spherical glue core sealing group
Part 4 slides along the spherical inner wall of upper valve body 3, realizes pole sealing or zero envelope function.
Claims (2)
1. a kind of underground rod tube safety valve, it includes control pipeline (1), top connection (2), upper valve body (3), spherical glue core sealing group
It is part (4), sealing ring (5), control pipe joint (6), back-moving spring (7), piston (8), central tube (9), sealing ring one (10), close
Seal two (11), sealing ring three (12), lower valve body (13), stage clip (14), sealing ring four (15), lower contact (16)；Its structure is special
Sign is：Top connection (2) upper end is provided with box, is connected with oil pipe, and top connection (2) lower end is provided with box, with upper valve body (3)
It is connected, upper valve body (3) is a cylindrical tube, and upper valve body (3) lower end is provided with pin thread, is connected with lower valve body (13), upper valve body
(3) outer wall is provided with boss, and screwed hole is provided with upper valve body (3) outer wall boss, and screwed hole is connected with control pipe joint (6)
Connect, control pipe joint (6) is connected with control pipeline (1), and upper valve body (3) upper inside wall is provided with step (3a), can limit
Central tube (9) up stroke, upper valve body (3) upper inside wall step (3a) are arranged with spherical inner wall, upper valve body (3) spherical inner wall with
Spherical glue core seal assembly (4) contact, spherical glue core seal assembly (4) can be slided along upper valve body (3) spherical inner wall, upper valve body
(3) step (3c) is provided with the middle part of inwall, through hole (3b), through hole (3b) one end connection control pipeline are provided with upper valve body (3)
Joint (6), other end connection upper valve body (3) inwall, through hole (3b) another end opening are located at upper valve body (3) inwall middle bench
Under (3c), upper valve body (3) inner chamber is cased with piston (8), and upper valve body (3) upper inside wall coordinates with piston (8) outer wall upper gap,
Piston (8) outer wall top is provided with annular groove, sealing ring (5) is laid, between upper valve body (3) inner wall lower and piston (8) outer wall bottom
Gap coordinates, and piston (8) outer wall bottom is provided with annular groove, lays sealing ring two (11), and piston (8) is a cylindrical tube, can be along upper
Valve body (3) inwall is slided, and piston (8) upper end is fixedly connected with spherical glue core seal assembly (4), is set in the middle part of piston (8) outer wall
There is step (8b), piston (8) outer wall middle bench (8b) is highly highly equal with upper valve body (3) inwall middle bench (3c), living
Plug (8) outer wall middle bench (8b) is located under upper valve body (3) inwall middle bench (3c), piston (8) outer wall middle bench
(8b) forms annulus post chamber (3d) with upper valve body (3) inwall middle bench (3c), piston (8) outer wall, upper valve body (3) inwall,
Annulus post chamber (3d) communicates with upper valve body (3) inner via hole (3b), and piston (8) inwall upper end is provided with boss, is set under boss
There is back-moving spring (7), back-moving spring (7) is enclosed in piston (8), and piston (8) inner wall lower is provided with lower boss (8d), bottom
Boss (8d) is arranged with stage clip (14), and lower boss (8d) coordinates with central tube (9) outer wall gap, lower boss (8d) inwall
Annular groove is provided with, lays sealing ring three (12), through hole (8a), through hole (8a) one end connection piston (8) are provided with piston (8) barrel
The circle that outer wall middle bench (8b) is formed with upper valve body (3) inwall middle bench (3c), piston (8) outer wall, upper valve body (3) inwall
Annulated column chamber (3d), through hole (8a) other end connection piston (8) inwall, through hole (8a) another end opening is under piston (8) inwall
Portion's boss (8d) upper end, central tube (9) are a cylindrical tube, are provided with boss in the middle part of central tube (9) outer wall, central tube (9) is outside
Support back-moving spring (7) lower end on boss in the middle part of wall, central tube (9) outer wall middle part boss height and piston (8) inner wall lower are convex
Platform (8d) is highly equal, and boss coordinates with piston (8) inwall gap in the middle part of central tube (9) outer wall, convex in the middle part of central tube (9) outer wall
Platform is provided with annular groove, lays sealing ring one (10), boss and piston (8) inner wall lower boss (8d) in the middle part of central tube (9) outer wall,
Piston (8) inwall, central tube (9) outer wall form annulus post chamber (8c), annulus post chamber (8c) and leading on piston (8) barrel
(8a) is communicated in hole, and lower valve body (13) inwall is provided with two steps, upper step (13a) support stage clip (14), and can limit work
(8) down stroke is filled in, lower step (13b) can limit central tube (9) down stroke, lower valve body (13) inwall and central tube (9) outer wall
Lower gap coordinates, and lower valve body (13) inwall is provided with annular groove, lays sealing ring four (15), lower valve body (13) lower end is provided with public affairs
Button, is connected, lower contact (16) lower end is provided with pin thread, is connected with oil pipe with lower contact (16)；
Described spherical glue core seal assembly (4) is combined by rubber seal (17), elastic skeleton (18), and spherical glue core is close
Sealing assembly (4) lower end is an annulus post, and upper end is by 12 glue cores along the circumferential direction 360 degree of uniform, spherical glue core seal assemblies (4)
Outside wall surface is sphere, and spherical glue core seal assembly has stable dynamic sealing, anticorrosive and antifatigue performance, meets Oil/gas Well
Requirement, it is real by controlling pipeline (1) back lash spring to reset by controlling the form that pipeline (1) pressurizes to realize mobile unlatching
Oil discharge passage closing between existing R a T；
When safety valve is opened, described central tube (9) is up, and piston (8) drives spherical glue core seal assembly (4) descending, center
Pipe (9) struts spherical glue core seal assembly (4), and spherical glue core seal assembly (4) does not seal, safety valve central tube (9)
Insertion, ensure the normal oil discharge passage of oil well production；When safety valve is closed, described central tube (9) is descending, and piston (8) drives
Spherical glue core seal assembly (4) is up, and spherical glue core seal assembly (4) is moved along upper valve body (3) spherical inner wall, closes up glue core,
Realize sealing.
2. rod tube safety valve in underground according to claim 1, it is characterised in that：Described central tube (9) up stroke is by upper
Valve body (3) upper step (3a) is limited, and down stroke is limited by lower valve body (13) lower step (13b)；Described piston (8) is descending
Journey is limited by lower valve body (13) upper step (13a), and up stroke is limited by upper valve body (3) inwall middle bench (3c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510164807.3A CN104847306B (en) | 2015-04-09 | 2015-04-09 | A kind of underground rod tube safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510164807.3A CN104847306B (en) | 2015-04-09 | 2015-04-09 | A kind of underground rod tube safety valve |
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| Publication Number | Publication Date |
|---|---|
| CN104847306A CN104847306A (en) | 2015-08-19 |
| CN104847306B true CN104847306B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510164807.3A Expired - Fee Related CN104847306B (en) | 2015-04-09 | 2015-04-09 | A kind of underground rod tube safety valve |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201700031592A1 (en) * | 2017-03-22 | 2018-09-22 | Fore S R L | SAFETY VALVE |
| CN110821438B (en) * | 2019-12-09 | 2024-04-05 | 天津轻工职业技术学院 | Blowout preventer for rod-driven screw pump oil extraction system |
| CN111101893B (en) * | 2019-12-28 | 2021-12-14 | 中海油能源发展股份有限公司 | Safety valve of underground oil well pump |
| CN111561295B (en) * | 2020-05-20 | 2024-05-10 | 大庆丹诺石油科技开发有限公司 | Double-channel underwater safety valve for hydraulic oil production of ocean oil well |
| CN113915385B (en) * | 2020-07-10 | 2023-07-28 | 中国海洋石油集团有限公司 | Valve plate sealing device of high-temperature underground safety valve of rod pump and working method of valve plate sealing device |
| CN111927391B (en) * | 2020-08-17 | 2021-10-15 | 川南航天能源科技有限公司 | Safety valve used in oil pipe and working method thereof |
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- 2015-04-09 CN CN201510164807.3A patent/CN104847306B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0915230B1 (en) * | 1997-11-10 | 2004-07-14 | Halliburton Energy Services, Inc. | Safety valve utilizing an isolation valve |
| CN201265392Y (en) * | 2008-10-21 | 2009-07-01 | 西南石油大学 | High-pressure anti-corrosion downhole safety valve for oil gas well |
| CN203081400U (en) * | 2013-01-23 | 2013-07-24 | 中国石油化工股份有限公司江苏油田分公司 | Double-seal flowback preventing check valve |
| CN203822259U (en) * | 2014-04-22 | 2014-09-10 | 中国海洋石油总公司 | Safety control tool for oil pipe of thermal production well |
| CN104278966A (en) * | 2014-10-17 | 2015-01-14 | 洪泽东俊阀门有限公司 | High-performance spherical well sealing blowout preventer |
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| CN104847306A (en) | 2015-08-19 |
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