CN110005362A - A kind of manual spraying prevention switch valve in underground - Google Patents
A kind of manual spraying prevention switch valve in underground Download PDFInfo
- Publication number
- CN110005362A CN110005362A CN201910312356.1A CN201910312356A CN110005362A CN 110005362 A CN110005362 A CN 110005362A CN 201910312356 A CN201910312356 A CN 201910312356A CN 110005362 A CN110005362 A CN 110005362A
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- China
- Prior art keywords
- hyoplastron
- valve
- gear pin
- mandrel
- prevention switch
- 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.)
- Withdrawn
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- 230000002265 prevention Effects 0.000 title claims abstract description 64
- 238000005507 spraying Methods 0.000 title claims abstract description 50
- 230000009471 action Effects 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims abstract description 3
- 238000009987 spinning Methods 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 210000003128 head Anatomy 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000004262 dental pulp cavity Anatomy 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 210000000720 eyelash Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- 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
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Landscapes
- 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
A kind of manual spraying prevention switch valve in underground, including top connection, release plug, baffle ring, main body, mandrel, gear pin, spool, valve seat, hyoplastron, lower contact, the main body upper end of tubular are equipped with top connection, and top connection side wall is equipped with release plug and baffle ring；The lower part of main body is equipped with the valve seat of spool and shell-like, spool is located at the stepped locations that the valve seat of shell-like is equipped with, gear pin is equipped at the position of step and is able to rotate the hyoplastron of closure as valve plate on gear pin, through a fixed pin axle sleeve on gear pin, hyoplastron carries out closing valve or Open valve around gear pin hyoplastron；The lower end of main body connects lower contact；Mandrel can open hyoplastron as an inner sleeve, when moving down and when the support as hyoplastron moves up valve opening mandrel, and hyoplastron is made to lose support, hyoplastron under the action of gear pin and torsional spring spinning reduction and close entire channel.
Description
Technical field
The present invention relates to blowout prevention technology fields in oil exploitation oil pipe, it particularly relates to which a kind of manual blowout prevention in underground is opened
Jet-preventing tool or a kind of manual float valve in pass valve, a kind of manual full-bore in underground.
Background technique
In modern oil-gas mining, fracturing work is a kind of very effective volume increase method.For hypotonic, compactness oil gas
In layer and shale oil and gas reservoir transformation process, stratum energy becomes larger after pressure, down-hole pressure is got higher, during playing lower tubular column,
Meeting overflow goes out a large amount of sump oil sewage and associated gas in oil pipe, and spillage can pollute well site environment in oil pipe；And make employee
Working environment is deteriorated；Especially winter construction when, well head, which freezes, can increase the task difficulty of well head operator.With new environmental protection
The promulgation of method solves the major issue that overflow in oil pipe is increasingly becoming underground work.
The domestic research in relation to jet-preventing tool in oil pipe reaches its maturity, and conventional float valve is when medium direct circulation, in medium
Valve plate reset spring resistance is overcome under effect, valve plate is pushed to rotate along pin, and valve plate is lifted off a seat, and float valve is opened, in drilling tool
Full tunnel is unimpeded, when medium direct circulation stops or overflow, well kick occurs, under the action of spring force and borehole pressure, and valve plate
Return is close to valve seat and packing, and float valve is closed, and achievees the purpose that close drilling tool internal channel, but operation process can not descend logging instrument or
Blanking plug, and the erosion easy to wear of float valve sealing structure are thrown in pitching；Conventional drill rod plug valve is mounted on kelly bar upper and lower side.With special
Spanner rotational valve core realizes the opening and closing of plug valve.When overflow or blowout occurs, kelly cock is closed,
Pipe internal channel is truncated, achievees the purpose that blowout prevention in pipe.It can not solve with pressure and fracturing work complex process, huge discharge sand fracturing
Its load fluid erosion influences tool sealing performance and then influences operation safety problem；And how to simplify work flow, improves operation
Safety；It reduces duty cycle, reduce operating cost；Therefore being badly in need of exploitation, there is the manual interior jet-preventing tool of special construction to compel in eyebrow
Eyelash, to meet with pressure and fracturing work ground manual switch oil pipe job requirements simple and reliable, safety and environmental protections, energy-efficient.
In conclusion how to make interior jet-preventing tool better meet with pressure and fracturing work use demand is mesh
Preceding technical problem urgently to be solved.
Summary of the invention
Technical assignment of the invention is against the above deficiency, a kind of manual spraying prevention switch valve in underground to be provided, to solve to allow ground
Jet-preventing tool better meets the problem of with pressure and fracturing work use demand in the manual opening-closing of face.
The technical scheme of the present invention is realized as follows: a kind of manual spraying prevention switch valve in underground, including top connection, release are blocked up
The main body upper end of head, baffle ring, main body, mandrel, gear pin, spool, valve seat, hyoplastron, lower contact, tubular is equipped with top connection, on
Connector side wall is equipped with release plug and baffle ring；The lower part of main body is equipped with the valve seat of spool and shell-like, and spool is located at the valve of shell-like
The stepped locations that seat is equipped with are equipped with gear pin at the position of step and are able to rotate the hyoplastron 9 of closure on gear pin
As valve plate, through a fixed pin axle sleeve on gear pin, hyoplastron carries out closing valve or unlatching around gear pin hyoplastron
Valve；The lower end of main body connects lower contact；
Mandrel can open hyoplastron as an inner sleeve, when moving down and the support as hyoplastron moves up valve opening mandrel
When, so that hyoplastron is lost support, hyoplastron under the action of gear pin and torsional spring spinning reduction and close entire channel.
Gear pin 6 is equipped with torsional spring；Spraying prevention switch clack valve plate can be around gear pin 6 and in the work of torsional spring and mandrel 5
It carries out closing valve or Open valve under；
Hyoplastron 9 be downwards rotation can rotating opening valve, hyoplastron 9 turn to upwards and step closure i.e. closing valve
Door.
Spraying prevention switch valve body, that is, shell is connected with spraying prevention switch valve top connection, and is sealed by O-shaped rubber ring；Blowout prevention
The middle part outer circle of switch valve top connection is equipped with pressure relief vent, and prepares corresponding release plug and baffle ring；Spraying prevention switch valve body
At barrel-like structure, inside is equipped with each road working hole to differ in size；Spool, spraying prevention switch valve valve are equipped in spraying prevention switch valve body
Seat (the combined labyrinth and carbon gland auxiliary-seat of elastic packing and hardness sealing), spraying prevention switch hyoplastron (valve plate), hyoplastron support frame, blowout prevention
Switch valve mandrel, mandrel are externally provided with transmission mechanism and are used cooperatively with gear pin, and gear pin is located at spraying prevention switch valve body
Vertical with axial line in the outer circle of middle part, the lower contact of spraying prevention switch valve is connected with the main body of spraying prevention switch valve, and passes through O shape rubber
Rubber sealing；Spraying prevention switch valve base is equipped with pin and covers the torsional spring on pin；Pin hole set by spraying prevention switch hyoplastron
Lower section of the cricoid hyoplastron support frame lining in spraying prevention switch hyoplastron after pin rotation can be additionally provided with around pin rotation.
The middle part outer circle of the spraying prevention switch valve top connection is equipped with pressure relief vent (balance hole), and prepares on hole and unload accordingly
Plug and baffle ring are pressed, the safety problem due to caused by internal pressure when dismantling oil pipe is reduced；
The mandrel is externally provided with transmission mechanism and is used cooperatively with gear pin, is full-bore through-hole, upper end end inside mandrel
The round hole that spherical seal surface is set at the inner hole of face can be by putting into corresponding ball into tubing string immediately, can be by force
This valve is opened, drainage conducting, it is ensured that tubing string safety.
The present invention is jet-preventing tool in one of the workover treatments such as petroleum, gas drilling, pressure break with pressure application, can also
Claim valve plate float valve.When valve plate is in close state, with tubing string enter well work, during drilling well or well workover once occur overflow,
Well kick or direct circulation stop, and ground moves up opening mandrel manually and under spring force closes this valve rapidly, and tubing string is truncated
Internal channel achievees the purpose that blowout prevention in tubing string.
When drilling fluid direct circulation, valve plate (or hyoplastron) reset spring resistance is overcome under the action of drilling fluid, is pushed
Valve plate is rotated along pin shaft, and valve plate is lifted off a seat, and float valve is opened, and full tunnel is unimpeded in drilling tool；When drilling fluid direct circulation stop or
When overflow, well kick occurs, under the action of spring force and borehole pressure, valve plate return is close to valve seat and packing, and float valve is closed, reached
To the purpose of closing drilling tool internal channel.
Jet-preventing tool can open interior jet-preventing tool by the strong valve opening plate of pitching in well in manually；But it can only be mentioned after opening
Interior jet-preventing tool can be closed by being raised to ground rotary drive pin shaft；Interior jet-preventing tool close when it is consistent with float valve principle have it is anti-overflow
Flow well blowout preventing function；The advantages of when unlatching is full-bore, sand control fluid erosion prevention increases service life, logging tool excessively includes magnetic orientation
Tool.
With dedicated spanner rotational valve plate (gear pin), the opening and closing of this interior jet-preventing tool are realized.It is excessive when occurring
When stream or blowout, this interior jet-preventing tool is turned off manually in ground, and oil pipe internal channel is truncated, achievees the purpose that blowout prevention in oil pipe.
Jet-preventing tool in this to be installed between each away from section oil pipe of card when oil field operation, after often above mentioning a root canal column, immediately
Then jet-preventing tool elder generation pressure release in following set can just lay down an oil pipe above, successively lay down each oil pipe；
Compared with jet-preventing tool in former drilling tool, advantage is full-bore, sand control, fluid erosion prevention increase service life, crosses well logging work
Tool include magnetic orientation tool, can pitching open by force, but must be turned off manually to ground；
In order to avoid the pressure medium of liquid in the chamber and latus rectum of two groups of inner blowout preventer valves is inconsistent, at the center of top connection
Position is equipped with the balance aperture of a Ф 3mm.First unclamped when tubing string is above mentioned to ground release plug at top connection bleed off it is interior anti-
Oil pipe can be dismantled after pressure has let out pressure by balance aperture by spraying upper tool part overpressure, be reduced interior when dismantling oil pipe
Safety problem caused by pressure.
This interior jet-preventing tool is applied to jet-preventing tool, fracturing tool, band in Operating Pressure and fracturing technology or Operating Pressure
Press drag fracturing tool.
Beneficial effect solves pressure break and logs well at present since the mandrel of the manual spraying prevention switch valve in underground designs for full-bore
Instrument or the pitching technological difficulties excessively harsh to tool construction size and performance；And then it simplifies work flow, improve work
Industry safety；Reduce duty cycle, reduce operating cost；It can also be by putting into the spraying prevention switch valve valve ball into well, just
Pressurizing urges spraying prevention switch poppet shaft opens hyoplastron (valve plate), and is supported in inner hole, is shown in a fully open operation hyoplastron (valve plate)；
But after opening, to close, only the manual spraying prevention switch valve in underground is promoted to ground, with special spanner rotary drive pin shaft,
Mandrel is moved up, is pulled due to the manual spraying prevention switch clack valve in underground and loses mandrel support, closed under the action of the torsion spring, and then complete
At the valve blowout prevention closing function, solves the closure of tradition machinery formula and easily set risk that is not tight and causing casualty accident；
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is structural schematic diagram when a kind of manual spraying prevention switch valve in underground according to an embodiment of the present invention is opened；
Fig. 2 is structure when realizing blowout prevention situation after a kind of manual spraying prevention switch valve in underground according to an embodiment of the present invention is closed
Schematic diagram；
Fig. 3 opens manual blowout prevention when being a kind of underground according to an embodiment of the present invention manual spraying prevention switch valve emergency pitching and opens
Structural schematic diagram when close valve state.
Fig. 4 is that a kind of manual spraying prevention switch valve pitching pressurizing urges mandrel in underground according to an embodiment of the present invention is beaten when moving down
Status architecture schematic diagram when valve opening plate (hyoplastron).
Fig. 5 is a kind of perspective view of the manual spraying prevention switch valve in underground according to an embodiment of the present invention；Mandrel upstream switch valve
Opening state.
Fig. 6 is a kind of perspective view of the manual spraying prevention switch valve in underground according to an embodiment of the present invention；It is different from Fig. 5, it is core
Axis moves down, the closed state of switch valve.
Fig. 7 is that transmission mechanism includes gear pin, gear, and mandrel exterior is equipped with the structure chart of rack gear.
In figure: 1, top connection；2, release plug；3, baffle ring；4, main body (shell)；5, mandrel；6, gear pin；7, valve
Core；8, valve seat (elastic packing and rigid combined sealing)；9, hyoplastron (valve plate)；10, lower contact；11, steel ball.
Specific embodiment
The manual spraying prevention switch valve in underground, including spraying prevention switch valve body (shell) are connected with spraying prevention switch valve top connection,
And it is sealed by O-shaped rubber ring；The middle part outer circle of spraying prevention switch valve top connection is equipped with pressure relief vent, and it is stifled to prepare corresponding release
Head and baffle ring；Spraying prevention switch valve body (shell) is equipped with each road working hole to differ in size at barrel-like structure, inside；Spraying prevention switch
Spool is equipped in valve body, spraying prevention switch valve base (the combined labyrinth and carbon gland auxiliary-seat of elastic packing and hardness sealing), blowout prevention is opened
It closes hyoplastron (valve plate), hyoplastron support frame, spraying prevention switch poppet shaft, mandrel, which is externally provided with transmission mechanism and gear pin cooperation, to be made
It is located at vertical with axial line in the middle part outer circle of spraying prevention switch valve body, the lower contact of spraying prevention switch valve and anti-with, gear pin
The main body of spray switch valve is connected, and is sealed by O-shaped rubber ring；Spraying prevention switch valve base is equipped with pin and covers on pin
Torsional spring；Pin hole set by spraying prevention switch hyoplastron can be additionally provided with cricoid hyoplastron support frame lining anti-around pin rotation
Lower section of the spray switch hyoplastron after pin rotation；
The middle part outer circle of the spraying prevention switch valve top connection is equipped with pressure relief vent (balance hole), and it is stifled to prepare corresponding release
Head and baffle ring, reduce the safety problem due to caused by internal pressure when dismantling oil pipe；
The mandrel is externally provided with transmission mechanism and is used cooperatively with gear pin, is full-bore through-hole, upper end end inside mandrel
The round hole that spherical seal surface is set at the inner hole of face can be by putting into corresponding ball into tubing string immediately, can be by force
This valve is opened, drainage conducting, it is ensured that tubing string safety；
It is described due to racing right through medium in the state of no blocking, playing flow resistance for full-bore through-hole
It is small, the effect of sand control, fluid erosion prevention；
After a period of use, when situation occurs in underground, that is, dedicated spanner rotational valve plate (trundle can be used in this product
Axis), it realizes the closing of this valve plate, closes oil pipe internal channel at this time, reach blowout prevention in oil pipe and act on.Mandrel is full-bore through-hole,
Convenient for launching logging tool and other positioning tools.
The mandrel is externally provided with transmission mechanism, gear pin (see Fig. 5-7) is used cooperatively, and transmission mechanism includes trundle
Axis, gear, mandrel exterior are equipped with rack gear, and the intermeshing of both gear pin, wheel and rack forms transmission chain, gear is around biography
Dynamic pin shaft, is rotated by gear, until making mandrel uplink or moving down, guarantees opening or closing for switch valve.
The above description is only an embodiment of the present invention, is not intended to limit the invention, all in the spirit and principles in the present invention
With any modifications, equivalent replacements, and improvements made within principle etc., it is already contained within protection scope of the present invention.
Claims (5)
1. a kind of manual spraying prevention switch valve in underground, which is characterized in that including top connection, release plug, baffle ring, main body, mandrel, biography
Dynamic pin shaft, spool, valve seat, hyoplastron, lower contact, the main body upper end of tubular are equipped with top connection, and top connection side wall is stifled equipped with release
Head and baffle ring；The lower part of main body is equipped with the valve seat of spool and shell-like, and spool is located at the stepped locations that the valve seat of shell-like is equipped with, i.e.,
Gear pin is equipped at the position of step and is able to rotate on gear pin the hyoplastron of closure as valve plate, and hyoplastron is consolidated by one
On gear pin, hyoplastron carries out closing valve or Open valve around gear pin rationed marketing axle sleeve；It is connect under the lower end connection of main body
Head；
Mandrel can open hyoplastron as an inner sleeve, when moving down and when the support as hyoplastron moves up valve opening mandrel, make
Hyoplastron loses support, hyoplastron under the action of gear pin and torsional spring spinning reduction and close entire channel.
2. the manual spraying prevention switch valve in underground according to claim 1, which is characterized in that gear pin is equipped with torsional spring；It is anti-
Spray switch valve hyoplastron can carry out closing valve or Open valve around gear pin 6 and under the action of torsional spring and mandrel 5.
3. the manual spraying prevention switch valve in underground according to claim 1, which is characterized in that hyoplastron is that rotation can turn downwards
Dynamic to open valve, hyoplastron turns to upwards to be closed with step by closing valve.
4. the manual spraying prevention switch valve in underground according to claim 1, which is characterized in that the middle part of spraying prevention switch valve top connection
Outer circle is equipped with pressure relief vent, and pressure relief vent prepares corresponding release plug and baffle ring.
5. the manual spraying prevention switch valve in underground according to claim 1, which is characterized in that the mandrel is externally provided with transmission mechanism
It is used cooperatively with gear pin, is full-bore through-hole inside mandrel, the circle of spherical seal surface is set at the end face inner bore of mandrel upper end
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312356.1A CN110005362A (en) | 2019-04-18 | 2019-04-18 | A kind of manual spraying prevention switch valve in underground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312356.1A CN110005362A (en) | 2019-04-18 | 2019-04-18 | A kind of manual spraying prevention switch valve in underground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110005362A true CN110005362A (en) | 2019-07-12 |
Family
ID=67172752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910312356.1A Withdrawn CN110005362A (en) | 2019-04-18 | 2019-04-18 | A kind of manual spraying prevention switch valve in underground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005362A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218253A1 (en) * | 2020-04-27 | 2021-11-04 | 四川大学 | Internal blowout-prevention gas-retaining connector for mine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531587A (en) * | 1984-02-22 | 1985-07-30 | Baker Oil Tools, Inc. | Downhole flapper valve |
| CN202850945U (en) * | 2012-10-18 | 2013-04-03 | 蒙善祥 | Compound seal plug valve with automatic-manual dual control function |
| CN104389554A (en) * | 2014-09-22 | 2015-03-04 | 江苏新彩阳机电技术有限公司 | Underground pressure control circulating switch valve |
| CN104405336A (en) * | 2014-10-15 | 2015-03-11 | 中国石油天然气股份有限公司 | Multifunctional tail pipe valve for operation under pressure |
| CN204267751U (en) * | 2014-08-14 | 2015-04-15 | 中科金佳（北京）油田技术开发有限公司 | Be provided with the multiple switching leak-resistance valve of cylndrical surface plate valve sealing configuration |
| CN206987781U (en) * | 2017-07-07 | 2018-02-09 | 中国石油天然气股份有限公司 | Blowout prevention and oil drainage integrated tool |
| CN209924961U (en) * | 2019-04-18 | 2020-01-10 | 江苏新彩阳机电技术有限公司 | Underground manual blowout prevention switch valve |
-
2019
- 2019-04-18 CN CN201910312356.1A patent/CN110005362A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4531587A (en) * | 1984-02-22 | 1985-07-30 | Baker Oil Tools, Inc. | Downhole flapper valve |
| CN202850945U (en) * | 2012-10-18 | 2013-04-03 | 蒙善祥 | Compound seal plug valve with automatic-manual dual control function |
| CN204267751U (en) * | 2014-08-14 | 2015-04-15 | 中科金佳（北京）油田技术开发有限公司 | Be provided with the multiple switching leak-resistance valve of cylndrical surface plate valve sealing configuration |
| CN104389554A (en) * | 2014-09-22 | 2015-03-04 | 江苏新彩阳机电技术有限公司 | Underground pressure control circulating switch valve |
| CN104405336A (en) * | 2014-10-15 | 2015-03-11 | 中国石油天然气股份有限公司 | Multifunctional tail pipe valve for operation under pressure |
| CN206987781U (en) * | 2017-07-07 | 2018-02-09 | 中国石油天然气股份有限公司 | Blowout prevention and oil drainage integrated tool |
| CN209924961U (en) * | 2019-04-18 | 2020-01-10 | 江苏新彩阳机电技术有限公司 | Underground manual blowout prevention switch valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218253A1 (en) * | 2020-04-27 | 2021-11-04 | 四川大学 | Internal blowout-prevention gas-retaining connector for mine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190712 |
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| WW01 | Invention patent application withdrawn after publication |