CN107355194A - A kind of annular preventer - Google Patents
A kind of annular preventer Download PDFInfo
- Publication number
- CN107355194A CN107355194A CN201710763073.XA CN201710763073A CN107355194A CN 107355194 A CN107355194 A CN 107355194A CN 201710763073 A CN201710763073 A CN 201710763073A CN 107355194 A CN107355194 A CN 107355194A
- Authority
- CN
- China
- Prior art keywords
- housing
- air bag
- annular
- glue core
- oil pipe
- 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.)
- Pending
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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
- 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
Abstract
The invention discloses a kind of annular preventer, including the first housing, air bag and inflation inlet.The annular preventer that this programme provides, gas deform to gas, air bag is filled between the first housing and air bag as the dynamic medium for promoting air bag to hold oil pipe tightly, charge valve, hold oil pipe tightly, realize the sealing of annular space between oil pipe and sleeve pipe；When light maintenance operation needs to carry oil pipe; because the compressibility of gas is preferable; tubing coupling can be with extruding gasbag; gas between air bag and the first housing, which is squeezed, to be deformed upon; the space among air bag is set to allow tubing coupling directly to pass through; the time for waiting hydraulic annular preventer to open and close is eliminated relative to prior art; so as to shorten the oil pipe lifting time of light maintenance operation; also the time of light maintenance operation is just shortened; the efficiency of light maintenance operation is improved, protects the reservoir in snubbing serving.
Description
Technical field
The present invention relates to Coal-seam Gas Recovery Technologies field, more particularly to a kind of annular preventer.
Background technology
Snubbing serving is a kind of operation of lower tubular column operating special installation by professional and technical personnel in environment with pressure
Method.
Snubbing serving equipment includes workbench, hoisting system, slips group and preventer group, and wherein preventer group includes ring
Shape preventer and bleed off pressure/balance four-way.
Annular preventer uses hydraulic annular preventer in the prior art, when light maintenance operation lifts oil pipe, for connecting
The tubing coupling of adjacent oil pipe is relatively large in diameter, and hydraulic annular preventer can not be directly by when tubing coupling passes through hydraulic pressure ring
During air defence spray apparatus, need to close for the hydraulic pressure annular blowout preventer that fuel feed pump box cupling passes through, for tubing coupling by, and other
The hydraulic pressure annular blowout preventer coordinated with oil pipe needs to be in opening, to ensure the sealing of annular space between oil pipe and sleeve pipe, leads to
Cross above-mentioned be alternately opened and closed using multiple hydraulic pressure annular blowout preventers and realize tubing coupling by way of, it is necessary to wait hydraulic pressure annular space to prevent
Spray apparatus opens and closes, and causes the oil pipe lifting time of light maintenance operation longer, also just extends the time of light maintenance operation, reduce
The efficiency of light maintenance operation；Simultaneously because coalbed methane reservoir produces water characteristic, the long well workover time can also cause true kill-job, destroy
Reservoir in snubbing serving.
Therefore, how to shorten the time of light maintenance operation, improve the efficiency of light maintenance operation, protect the storage in snubbing serving
Layer, turns into those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, the invention provides a kind of annular preventer, to shorten the time of light maintenance operation, light maintenance operation is improved
Efficiency, protect snubbing serving in reservoir.
To achieve the above object, the present invention provides following technical scheme：
A kind of annular preventer, including：
First housing；
Air bag, the air bag are arranged at the inner chamber of first housing and are sheathed on oil-pipe external wall, the outer wall of the air bag
Inflatable chamber is formed between the inwall of first housing, the upper surface of the air bag and the upper surface of first housing are fixed
Connection, the lower surface of the air bag is fixedly connected with the lower surface of first housing；
Offered on first housing for making the inwall of the air bag be bonded with oil pipe to the inflation interacvity air-filling
Inflation inlet.
Preferably, in above-mentioned annular preventer, in addition to：
The glue core of the air bag inwall is arranged at, the glue core retainer plate is located at the outer wall of the oil pipe.
Preferably, in above-mentioned annular preventer, the upper surface of the air bag and the upper surface clamping of first housing,
The lower surface of the air bag and the lower surface clamping of first housing；
Also include：
For compressing the upper surface of the air bag in the second housing of the upper surface of first housing；
For compressing the lower surface of the air bag in the 3rd housing of the lower surface of first housing.
Preferably, in above-mentioned annular preventer, the upper surface of the air bag is provided with the first annular projection, and described first
The upper surface of housing is provided with the first annular recess coordinated with first annular projection；The lower surface of the air bag is provided with
Second annular projection, the lower surface of first housing are provided with the second annular recess coordinated with second annular projection.
Preferably, in above-mentioned annular preventer, the lower end of the upper end of the glue core and the glue core is provided with glue core
Skeleton, the glue core crab positioned at the upper end of the glue core is connected with second housing by the first jackscrew, positioned at the glue core
The glue core crab of lower end be connected with the 3rd housing by the second jackscrew.
Preferably, in above-mentioned annular preventer, in addition to：
4th housing, the 4th housing are located at the upper end of second housing, offer and be used on the 4th housing
Export the blast pipe of shaft bottom waste gas；
Caulking gum, the caulking gum include the connecting portion coordinated with the upper surface of the 4th housing and with the oil
The outer wall of pipe is bonded the sealing of the upper end annular space for preventing waste gas to be spilled over to the connecting portion, and the sealing is relative to institute
The axis for stating the 4th housing is in tilted layout, and the upper end of the lower end sealing of the sealing is close to the 4th housing
Axis；
For compressing the gland of the caulking gum.
Preferably, in above-mentioned annular preventer, the end of the sealing is inclined plane, and the inclined plane upper end is compared with institute
State axis of the lower end close to the 4th housing of inclined plane.
Preferably, in above-mentioned annular preventer, the 3rd annular projection, the 4th housing are provided with the connecting portion
On offer the 3rd annular recess with the 3rd shape shape male cooperation；
The gland is connected with the 4th casing bolts；
4th housing is positioned with second housing by pin, and the 4th housing passes through with second housing
Bolt connection.
Preferably, in above-mentioned annular preventer, second housing and the first housing bolt connection, the described 3rd
Housing and the first housing bolt connection；
Sealing ring, the 3rd housing and first housing are provided between second housing and first housing
Between be provided with the sealing ring.
Preferably, in above-mentioned annular preventer, the air bag and first housing are coaxially arranged；
Charge valve is provided with the inflation inlet.
It can be seen from the above technical proposal that annular preventer provided by the invention, including the first housing, air bag and inflation
Mouthful.The annular preventer that this programme provides, gas is as the dynamic medium for promoting air bag holding oil pipe, and charge valve is to the first housing
Gas is filled between air bag, air bag deforms, and holds oil pipe tightly, realizes the sealing of annular space between oil pipe and sleeve pipe；Light maintenance is made
When industry needs to carry oil pipe, because the compressibility of gas is preferable, tubing coupling can be with extruding gasbag, positioned at air bag and first shell
Gas between body, which is squeezed, to be deformed upon, and the space among air bag is allowed tubing coupling directly by relative to existing skill
Art eliminates the time for waiting hydraulic annular preventer to open and close, so as to shorten the oil pipe lifting time of light maintenance operation,
Also the time of light maintenance operation is just shortened, the efficiency of light maintenance operation is improved, protects the reservoir in snubbing serving.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of annular preventer provided in an embodiment of the present invention.
1st, caulking gum, 2, blast pipe, 3, pin, the 4, first jackscrew, 5, glue core crab, 6, charge valve, 7, glue core, 8, gas
Capsule, the 9, the 3rd housing, the 10, first housing, 11, sealing ring, the 12, second housing, the 13, the 4th housing, 14, bolt, 15, gland.
Embodiment
The invention discloses a kind of annular preventer, to shorten the time of light maintenance operation, improves the efficiency of light maintenance operation, protects
The reservoir protected in snubbing serving.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, Fig. 1 is the structural representation of annular preventer provided in an embodiment of the present invention.
The invention discloses a kind of annular preventer, including the first housing 10, air bag 8 and inflation inlet 6.
First housing 10 is located at outermost layer, and the outer wall of the first housing 10 is bonded with the inwall of sleeve pipe, plays protection internal zero
The effect of part
Air bag 8 is arranged at the inner chamber of the first housing 10 and is sheathed on oil-pipe external wall, the outer wall of air bag 8 and the first housing 10
Inflatable chamber is formed between inwall, inflatable chamber provides space for the infeed of gas.Offer and be used for inflation on first housing 10
Interacvity air-filling makes the inflation inlet 6 that the inwall of air bag 8 and oil pipe are bonded.
In a specific embodiment of this programme, it is in I-shaped that air bag 8 is overall.
By inflation inlet 6, into inflatable chamber, gas injection, the gas in inflatable chamber make the inwall of air bag 8 be pressed in oil pipe
Outer wall, realize the sealing to annular space between oil pipe and sleeve pipe.
The upper surface of air bag 8 is fixedly connected with the upper surface of the first housing 10, the lower surface of air bag 8 and the first housing 10
Lower surface is fixedly connected, and prevents that air bag 8 comes off from the first housing 10 during air bag 8 compresses oil pipe.
The annular preventer that this programme provides, dynamic medium of the gas as holding oil pipe, charge valve 6 is to the first housing 10
Gas is filled between air bag 8, air bag 8 deforms, and holds oil pipe tightly, realizes the sealing of annular space between oil pipe and sleeve pipe；Light maintenance
When operation needs to carry oil pipe, because the compressibility of gas is preferable, the tubing coupling of adjacent oil pipe can be with extruding gasbag 8, position
Gas between the housing 10 of air bag 8 and first, which is squeezed, to be deformed upon, and makes the space among air bag 8 allow tubing coupling direct
By eliminating the time for waiting hydraulic annular preventer to open and close relative to prior art, making so as to shorten light maintenance
The oil pipe lifting time of industry, the time of light maintenance operation is also just shortened, improve the efficiency of light maintenance operation.
The annular preventer that this programme provides, in addition to glue core 7.Glue core 7 is arranged at the inwall of air bag 8, and glue core 7 is arranged
In the outer wall of oil pipe.
The annular preventer that this programme provides has been sequentially arranged the first housing from sleeve pipe to oil pipe along the radial direction of oil pipe
10th, air bag 8 and glue core 7, and glue core 7 is located at innermost layer.
This programme provide annular preventer, gas as promote glue core 7 holding oil pipe dynamic medium, charge valve 6 to
Inflatable chamber between first housing 10 and air bag 8 is filled with gas, and air bag 8 promotes glue core 7 to deform, and holds oil pipe tightly, realizes oil
The sealing of annular space between pipe and sleeve pipe；When light maintenance operation needs to carry oil pipe, because the compressibility of gas is preferable, adjacent oil pipe
Tubing coupling can extrude glue core 7, and then the extruding gasbag 8 of glue core 7, the gas between the housing 10 of air bag 8 and first by
Extruding deforms upon, and makes the space of glue core 7 allow tubing coupling directly by being eliminated relative to prior art and waiting hydraulic pressure ring
The time that shape preventer opens and closes, so as to shorten the oil pipe lifting time of light maintenance operation, also just shorten light maintenance operation
Time, improve the efficiency of light maintenance operation, protect the reservoir in snubbing serving.
The design of glue core 7 enhances the wearability of annular preventer and higher use intensity, extends to a certain extent
The service life of annular preventer.
The annular preventer that this programme provides, the first housing 10 form pneumatic tyre with air bag 8, glue core 7 provided along oil pipe footpath
To the resilient support in direction, the sealing of annular preventer is improved, and pneumatic tyre is relative to solid elastic part and hydroelastic system part
Elasticity it is big, solve the problems, such as tubing coupling by when serious wear, extend the service life of annular preventer.
When the gas pressure between the first housing 10 and air bag 8 of annular preventer is excessive, can by inflation inlet 6 to
The certain gas of outer discharge, to meet the requirement above proposed to the holding of oil pipe or tubing coupling.One in this programme is specific
In embodiment, inflation inlet 6 is opened in the side wall of the first housing 10.
The supercharging for the annular preventer that this programme provides and pressure decay rate are fast, further increase the efficiency of light maintenance operation.
The cost for the annular preventer that this programme provides is simple in construction relative to hydraulic annular preventer, and cost is low.
The upper surface of air bag 8 and the upper surface clamping of the first housing 10, the lower surface of air bag 8 and the lower end of the first housing 10
Face clamping, the difficulty that air bag 8 is connected with the first housing 10 can be reduced using the connected mode of clamping, while facilitate air bag 8
Installation and replacing.
The stable of air bag 8 is fixed in order to realize, the annular preventer that this programme provides also includes the second housing 12 and the
Three housings 9.
In the upper surface of the first housing 10, the 3rd housing 9 is used to compress for the upper surface that second housing 12 is used to compress air bag 8
The lower surface of air bag 8 is in the lower surface of the first housing 10.
The compression of upper surface and lower surface to air bag 8 is realized by the second housing 12 and the 3rd housing 9, is increased to gas
The upper surface of capsule 8 and the compression area of lower surface, this kind of compression mode can not only ensure the compression effect to air bag 8, and
The damage to air bag 8 can be reduced, extends the service life of air bag 8.
The interface arrangment of air bag 8 and the second housing 12 and the 3rd housing 9 is as follows：
The upper surface of air bag 8 is provided with the first annular projection, and the upper surface of the first housing 10 is provided with convex with the first ring-type
Act the first annular recess coordinated.
The lower surface of air bag 8 is provided with the second annular projection, and the lower surface of the first housing 10 is provided with convex with the second ring-type
Act the second annular recess coordinated.
First annular projection of the upper surface of air bag 8 is connected in the first annular recess, and the second ring-type of the upper surface of air bag 8 is convex
Rise and be connected in the second annular recess, after the completion of clamping, then by the second housing 12 and the 3rd housing 9 air bag 8 is compressed,
It ensure that the compression effect to air bag 8.
In order to further optimize above-mentioned technical proposal, in a specific embodiment of this programme, the upper end of glue core 7 and glue
The lower end of core 7 is provided with glue core crab 5, and glue core crab 5 is capable of the intensity of the top and bottom of reinfored glue core 7, extends glue core 7
Service life.
In a specific embodiment of this programme, the upper end of glue core 7 extends to the inwall of the second housing 12, glue core 7
Lower end extends to the inwall of the 3rd housing 9, i.e. the length of glue core 7 begins to pass through the first housing 10 from the second housing 12 and extends to
Three housings 9.
Glue core crab 5 positioned at the upper end of glue core 7 is connected with the second housing 12 by the first jackscrew 4, under glue core 7
The glue core crab 5 at end is connected with the 3rd housing 9 by the second jackscrew.Glue core 7 and glue are realized by the first jackscrew 4 and the second jackscrew
The connection of core crab 5, the installation and removal of glue core 7 can be facilitated, and the interference to other parts can be reduced.
The annular preventer that this programme provides also includes the 4th housing 13, caulking gum 1 and gland 15.4th housing 13,
Caulking gum 1 and gland 15 constitute spilling gas recovery system, ensure job safety.
4th housing 13 is located at the upper end of the second housing 12, and the row for exporting shaft bottom waste gas is offered on the 4th housing 13
Tracheae 2.
Caulking gum 1 includes the connecting portion coordinated with the upper surface of the 4th housing 13 and is bonded with the outer wall of oil pipe for preventing
Only waste gas is spilled over to the sealing of the upper end annular space of connecting portion, and sealing is in tilted layout relative to the axis of the 4th housing 13, close
The lower end in envelope portion compared with sealing upper end close to the 4th housing 13 axis.
Gland 15 is used to compress caulking gum 1.
The seal portion angled arrangement of caulking gum 1, forms between the outer wall of sealing and the inwall of the 4th housing 13 and holds
Receive the space of waste gas, after the space between glue core 7 and oil pipe is entered positioned at the waste gas of sealing bottom, waste gas can enter sealing
Between portion and the 4th housing 13 receiving waste gas space, now waste gas sealing can be promoted further to compress oil pipe, prevent from giving up
Gas enters the annular space on annular preventer top, plays a part of ensureing operation installation.
After the space for accommodating waste gas is filled with shaft bottom waste gas, waste gas is expelled to outside well by the blast pipe 2 of the 4th housing 13
Waste gas recovering device, ensure the safety of well site and personnel during operation.
Gland 15 is used to realize is pressed on the 4th housing 13 by caulking gum 1, ensures effective pressure to caulking gum 1
Tightly, so as to ensureing the safety of operation.
In order that caulking gum 1 does not influence the operation that raises and decentralizes of oil pipe, the end of sealing is inclined plane, inclined plane
Upper end compared with inclined plane lower end close to the 4th housing 13 axis.The inclined plane of the end of sealing can to oil pipe above carry and
Guide effect is played in decentralization, and can ensure the close patch of sealing end and oil pipe in by waste gas extrusion process in sealing
Close.
The housing 13 of caulking gum 1 and the 4th uses the type of attachment of clamping, specific as follows：
The 3rd annular projection is provided with connecting portion, the 3rd with the 3rd shape shape male cooperation is offered on the 4th housing 13
Annular recess.3rd annular projection is caught in the 3rd annular recess, and gland 15 realizes the compression to the interface arrangment.
In order to facilitate the installation of the housing 13 of gland 15 and the 4th, gland 15 and the bolt connection of the 4th housing 13, or gland
15 are threadedly coupled with the 4th housing 13.
In a specific embodiment of this programme, the 4th housing 13 is positioned with the second housing 12 by pin 3, the 4th shell
Body 13 is connected with the second housing 12 by bolt 14.
Second housing 12 and the bolt connection of the first housing 10, the 3rd housing 9 and the bolt connection of the first housing 10, realize
Two housings 12 and the 3rd housing 9 are detachably connected with the first housing 10, facilitate follow-up maintenance.
In order to ensure the sealing of annular preventer, sealing ring 11 is provided between the second housing 12 and the first housing 10,
Sealing ring 11 is provided between 3rd housing 9 and the first housing 10.Sealing ring 11 between second housing 12 and the first housing 10
Second housing 12 is compressed by the second housing 12, the sealing ring 11 between the 3rd housing 9 and the first housing 10 passes through the 3rd housing 9
Compress.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
- A kind of 1. annular preventer, it is characterised in that including：First housing (10)；Air bag (8), the air bag (8) are arranged at the inner chamber of first housing (10) and are sheathed on oil-pipe external wall, the air bag (8) inflatable chamber, the upper surface and described first of the air bag (8) are formed between outer wall and the inwall of first housing (10) The upper surface of housing (10) is fixedly connected, and the lower surface of the lower surface of the air bag (8) and first housing (10), which is fixed, to be connected Connect；Offered on first housing (10) for making the air bag (8) be bonded with the oil pipe to the inflation interacvity air-filling Inflation inlet (6).
- 2. annular preventer according to claim 1, it is characterised in that also include：The glue core (7) of the air bag (8) inwall is arranged at, the glue core (7) is set in the outer wall of the oil pipe.
- 3. annular preventer according to claim 2, it is characterised in that the upper surface and described first of the air bag (8) The upper surface clamping of housing (10), the lower surface of the air bag (8) and the lower surface clamping of first housing (10)；Also include：For compressing the upper surface of the air bag (8) in the second housing (12) of the upper surface of first housing (10)；For compressing the lower surface of the air bag (8) in the 3rd housing (9) of the lower surface of first housing (10).
- 4. annular preventer according to claim 3, it is characterised in that the upper surface of the air bag (8) is provided with first Annular projection, the upper surface of first housing (10) are provided with the first annular recess coordinated with first annular projection； The lower surface of the air bag (8) is provided with the second annular projection, and the lower surface of first housing (10) is provided with and described The second annular recess that two annular projections coordinate.
- 5. annular preventer according to claim 3, it is characterised in that the upper end of the glue core (7) and the glue core (7) Lower end be provided with glue core crab (5), glue core crab (5) and second housing positioned at the upper end of the glue core (7) (12) connected by the first jackscrew (4), glue core crab (5) and the 3rd housing (9) positioned at the lower end of the glue core (7) are logical Cross the connection of the second jackscrew.
- 6. annular preventer according to claim 3, it is characterised in that also include：4th housing (13), the 4th housing (13) are located at the upper end of second housing (12), the 4th housing (13) On offer blast pipe (2) for exporting shaft bottom waste gas；Caulking gum (1), the caulking gum (1) include the connecting portion coordinated with the upper surface of the 4th housing (13) and with The outer wall of the oil pipe is bonded the sealing of the upper end annular space for preventing waste gas to be spilled over to the connecting portion, the sealing phase It is in tilted layout for the axis of the 4th housing (13), the upper end of the lower end sealing of the sealing is close to described The axis of 4th housing (13)；For compressing the gland (15) of the caulking gum (1).
- 7. annular preventer according to claim 6, it is characterised in that the end of the sealing is inclined plane, described Axis of the lower end of the inclined plane upper end inclined plane close to the 4th housing (13).
- 8. annular preventer according to claim 6, it is characterised in that it is convex that the 3rd ring-type is provided with the connecting portion Rise, the 3rd annular recess with the 3rd shape shape male cooperation is offered on the 4th housing (13)；The gland (15) and the 4th housing (13) bolt connection；4th housing (13) and second housing (12) are positioned by pin (3), the 4th housing (13) with it is described Second housing (12) is connected by bolt (14).
- 9. annular preventer according to claim 3, it is characterised in that second housing (12) and first housing (10) bolt connection, the 3rd housing (9) and the first housing (10) bolt connection；Be provided with sealing ring (11) between second housing (12) and first housing (10), the 3rd housing (9) with The sealing ring (11) is provided between first housing (10).
- 10. annular preventer according to claim 1, it is characterised in that the air bag (8) and first housing (10) It is coaxially arranged；Charge valve is provided with the inflation inlet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763073.XA CN107355194A (en) | 2017-08-30 | 2017-08-30 | A kind of annular preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763073.XA CN107355194A (en) | 2017-08-30 | 2017-08-30 | A kind of annular preventer |
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| CN107355194A true CN107355194A (en) | 2017-11-17 |
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ID=60288492
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| CN201710763073.XA Pending CN107355194A (en) | 2017-08-30 | 2017-08-30 | A kind of annular preventer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109138895A (en) * | 2018-08-29 | 2019-01-04 | 曲睿婕 | A kind of four ram preventer of coiled tubing, half seal apparatus and method |
| CN110485965A (en) * | 2019-07-26 | 2019-11-22 | 大连理工大学 | Crude oil blowout swathes inflation squash type plugging device |
| CN113309484A (en) * | 2021-06-29 | 2021-08-27 | 高洁琳 | Rotary blowout preventer for oil well construction operation |
| CN113464081A (en) * | 2020-03-30 | 2021-10-01 | 中国石油化工股份有限公司 | Coal bed gas micro-strip pressure well repairing process |
| CN116122760A (en) * | 2023-03-20 | 2023-05-16 | 盐城市崇达石化机械有限公司 | Automatic locking casing head |
| CN117631076A (en) * | 2024-01-23 | 2024-03-01 | 鼎实智能装备（青岛）有限公司 | Coupling detection device and detection method thereof |
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| CN109138895A (en) * | 2018-08-29 | 2019-01-04 | 曲睿婕 | A kind of four ram preventer of coiled tubing, half seal apparatus and method |
| CN109138895B (en) * | 2018-08-29 | 2020-08-14 | 大庆丹枫石油技术开发有限公司 | Coiled tubing four-ram blowout preventer semi-sealing device and method |
| CN110485965A (en) * | 2019-07-26 | 2019-11-22 | 大连理工大学 | Crude oil blowout swathes inflation squash type plugging device |
| CN110485965B (en) * | 2019-07-26 | 2021-08-06 | 大连理工大学 | Winding inflatable extrusion type plugging device for crude oil blowout |
| CN113464081A (en) * | 2020-03-30 | 2021-10-01 | 中国石油化工股份有限公司 | Coal bed gas micro-strip pressure well repairing process |
| CN113309484A (en) * | 2021-06-29 | 2021-08-27 | 高洁琳 | Rotary blowout preventer for oil well construction operation |
| CN116122760A (en) * | 2023-03-20 | 2023-05-16 | 盐城市崇达石化机械有限公司 | Automatic locking casing head |
| CN116122760B (en) * | 2023-03-20 | 2023-10-24 | 盐城市崇达石化机械有限公司 | Automatic locking casing head |
| CN117631076A (en) * | 2024-01-23 | 2024-03-01 | 鼎实智能装备（青岛）有限公司 | Coupling detection device and detection method thereof |
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