CN110259419A - Concentric screen and attaching method thereof - Google Patents
Concentric screen and attaching method thereof Download PDFInfo
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- CN110259419A CN110259419A CN201910653965.3A CN201910653965A CN110259419A CN 110259419 A CN110259419 A CN 110259419A CN 201910653965 A CN201910653965 A CN 201910653965A CN 110259419 A CN110259419 A CN 110259419A
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- Prior art keywords
- connector
- concentric
- screen
- pipe nipple
- concentric screen
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The present invention provides a kind of concentric screens and attaching method thereof, are related to completion technique field, including base tube, the first connector, the second connector and outer tube；First connector and the second connector fixing sleeve are loaded on base tube, and the first connector and the second connector are arranged along the axially spaced-apart of base tube.One end of outer tube is connect with the first connector, and the other end is connect with the second connector, and the first annulus space is formed between outer tube and base tube；After the connection of two concentric screens, the first connector on first concentric screen connect with the second connector on second concentric screen and forms the first cylinder, the base tube on base tube and second concentric screen on first concentric screen is tightly connected to form the second cylinder, and the second annulus space is formed between the first cylinder and the second cylinder；The through-hole for being connected to the first annulus space Yu the second annulus space is offered on first connector and the second connector.The good technical effect of connecting property of concentric screen is reached.
Description
Technical field
The present invention relates to completion technique fields, in particular to concentric screen and attaching method thereof.
Background technique
In the gravel filling sand prevention of the open hole wells such as deep water hydrocarbon well or long horizontal well, due to the influence of environmental condition,
It is easy to appear local hole anomaly, ground subsidence or early stage sand bridge phenomenons in high speed stowing operation, form barrier, lead to portion
Divide well section filling incomplete, it is easier to damage, shorten the well service life.
The connection type of sand control screen is to connect the base tube or pipe nipple of two screen casings up and down by box cupling in the prior art
The base tube of part or upper and lower two screen casings is with tubing thread or is connected with pipe nipple, then is connected by box cupling.But it is inside and outside double realizing
While layer screen casing is separately connected, also to guarantee the connectivity and leakproofness of the annulus access between concentric screen, the prior art
In connection type cannot achieve the interconnection of whole system annulus access.
Therefore it provides good concentric screen of a kind of connectivity and attaching method thereof becomes those skilled in the art to be solved
Important technological problems.
Summary of the invention
The purpose of the present invention is to provide a kind of concentric screens and attaching method thereof, to alleviate concentric screen in the prior art
The technical problem that can not be interconnected.
In a first aspect, the embodiment of the invention provides a kind of concentric screen, including base tube, the first connector, the second connection
Part and outer tube；
First connector and the second connector fixing sleeve are loaded on the base tube, and first connector and institute
The axially spaced-apart that the second connector is stated along the base tube is arranged；
One end of the outer tube is connect with first connector, and the other end is connect with second connector, and institute
It states and forms the first annulus space between outer tube and the base tube；
After the connection of two concentric screens, on the first connector and second concentric screen on first concentric screen the
Two connectors connect and are formed the first cylinder, the base tube sealing on the base tube and second concentric screen on first concentric screen
Connection forms the second cylinder, forms the second annulus space between first cylinder and second cylinder；
It offers on first connector and second connector for being connected to first annulus space and institute
State the through-hole of the second annulus space.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein above-mentioned
First connector includes top connection and upper pipe nipple；
The top connection fixing sleeve is loaded on the first end of the base tube, and the upper pipe nipple fixing sleeve is loaded on the top connection,
The through-hole is provided on the upper pipe nipple.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein above-mentioned
Upper pipe nipple and the top connection are tightly connected.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein above-mentioned
Second connector includes lower contact and lower pipe nipple；
The lower contact fixing sleeve is loaded on the second end of the base tube, and the lower pipe nipple fixing sleeve is loaded on the lower contact,
The through-hole is provided on the lower pipe nipple.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein above-mentioned
Lower pipe nipple and the lower contact are tightly connected.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein first
The upper pipe nipple on root concentric screen can be connect by box cupling with the lower pipe nipple on second concentric screen.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein above-mentioned
Base tube includes the inside screen casing and central tube being arranged in the axial direction；
One end of the internal screen casing and the top connection are tightly connected, and the other end and the lower contact are tightly connected；
The central tube is connect by the lower contact with the inner screen seal of tube.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein above-mentioned
Top connection offers the attachment base for central tube insertion backwards to one end of the internal screen casing；
The outer wall of the one end of the central tube far from the lower contact is provided with sealing ring, and the central tube passes through described close
Seal and the lower contact are tightly connected.
With reference to first aspect, the embodiment of the invention provides a kind of possible embodiments of first aspect, wherein
After the upper pipe nipple on a piece concentric screen is connect with the lower pipe nipple on second concentric screen, the central tube and institute
State attachment base sealed connection.
Second aspect, the embodiment of the invention provides a kind of concentric screen connection methods, comprising the following steps:
Elevator is beaten on the upper pipe nipple of previous concentric screen, well head is seated；
Elevator is beaten on the upper pipe nipple of latter concentric screen, and is sling；
The lower pipe nipple of latter concentric screen is connect with the box cupling on previous concentric screen, latter at this time concentric screen
The central tube top connection that can be automatically imported previous screen casing attachment base at, tighten lower pipe nipple and box cupling, complete two bilayers
The connection of screen casing.
The utility model has the advantages that
The present invention provides a kind of concentric screens, including base tube, the first connector, the second connector and outer tube；First
Connector and the second connector are set in the outer wall of base tube；One end of outer tube is set in the outer wall of the first connector, the other end
It is set in the outer wall of the second connector, and forms the first annulus space between outer tube and base tube；After the connection of two concentric screens,
The first connector on first concentric screen connect and is formed the first cylinder with the second connector on second concentric screen,
The base tube on base tube and second concentric screen on first concentric screen is tightly connected to form the second cylinder, the first cylinder and
The second annulus space is formed between second cylinder；It is offered on first connector and the second connector for being connected to the first annular space
The through-hole in space and the second annulus space.
When in use, first concentric screen is fixed on well head, then by the second connector of second concentric screen with
First connector of first concentric screen links together, and forms the first cylinder, meanwhile, first concentric screen and second
Base tube in concentric screen can link together, and the second cylinder be formed, so that the circulation of the substrate tube in two concentric screens
Channel connection, and can be empty by the first annulus space and the second annular space by the through-hole on the first connector and the second connector
Between be connected to.When packing fluid carries out filling operation, packing fluid can pass through out of first concentric screen the first annulus space
Through-hole on second connector flows into the second annulus space, then again by logical on the first connector of the root concentric screen
Hole flows into the second annulus space of second concentric screen, setting in this way, so that packing fluid may not flow into base tube
Interior circulation passage.To enable packing fluid to pass through the first annulus space and the second ring when more concentric screens connect
Absolutely empty flows in another concentric screen from a concentric screen, may not flow into the circulation passage of base tube, completes concentric screen
Connectivity when connection.
The present invention provides a kind of concentric screen connection method, comprising the following steps: beats elevator in previous concentric screen
Upper pipe nipple on, be seated well head；Elevator is beaten on the upper pipe nipple of latter concentric screen, and is sling；Latter double deck screen
The lower pipe nipple of pipe is connect with the box cupling on previous concentric screen, before the central tube of latter at this time concentric screen can be automatically imported
At the attachment base of the top connection of a piece screen casing, lower pipe nipple and box cupling are tightened, completes the connection of two concentric screens.Concentric screen connects
Connecing method compared with prior art has above-mentioned advantage, and details are not described herein again.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structure sectional view of concentric screen provided in an embodiment of the present invention；
Fig. 2 is the partial sectional view that concentric screen provided in an embodiment of the present invention connects another concentric screen；
Fig. 3 is the partial structure sectional view of concentric screen provided in an embodiment of the present invention；
Fig. 4 is another partial structure sectional view of concentric screen provided in an embodiment of the present invention；
Fig. 5 is partial structurtes section view when concentric screen provided in an embodiment of the present invention will be inserted into another concentric screen
Figure.
Icon:
100- base tube；The first annulus space of 110-；The second annulus space of 120-；Screen casing inside 130-；The center 140-
Pipe；
The first connector of 200-；210- top connection；The upper pipe nipple of 220-；230- attachment base；240- box cupling；
The second connector of 300-；310- lower contact；Pipe nipple under 320-；
400- outer tube；
500- through-hole.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, the instructions such as term " center ", "upper", "lower", "inner", "outside"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, the terms such as term " connection ", " fixation " should do broad sense reason
Solution, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connection, be also possible to electricity
Connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of element.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
The present invention is described in further detail below by specific embodiment and in conjunction with attached drawing.
Referring to shown in Fig. 1-Fig. 5, present embodiments providing a kind of concentric screen, including base tube 100, the first connector
200, the second connector 300 and outer tube 400；First connector 200 and 300 fixing sleeve of the second connector are loaded on base tube 100, and
First connector 200 and the second connector 300 are arranged along the axially spaced-apart of base tube 100；One end of outer tube 400 is connect with first
Part 200 connects, and the other end is connect with the second connector 300, and the first annulus space is formed between outer tube 400 and base tube 100
110。
Please continue to refer to Fig. 1, after the connection of two concentric screens, the first connector 200 on first concentric screen and the
The second connector 300 on two concentric screens connects and forms the first cylinder, base tube 100 on first concentric screen and the
Base tube 100 on two concentric screens, which is tightly connected, forms the second cylinder, and the second ring is formed between the first cylinder and the second cylinder
Absolutely empty 120；It is offered on first connector 200 and the second connector 300 for being connected to the first annulus space 110 and second
The through-hole 500 of annulus space 120.
Referring to shown in Fig. 1 and Fig. 5, when in use, first concentric screen is fixed on well head, then by second double deck screen
Second connector 300 of pipe and the first connector 200 of first concentric screen link together, and form the first cylinder, meanwhile,
Base tube 100 in first concentric screen and second concentric screen can link together, and form the second cylinder, so that two double
Circulation passage connection inside base tube 100 in layer screen casing, and by the first connector 200 and the second connector 300
First annulus space 110 can be connected to by through-hole 500 with the second annulus space 120.When packing fluid carries out filling operation, filling
Liquid can flow into second by the through-hole 500 on the second connector 300 out of first concentric screen the first annulus space 110
In annulus space 120, second bilayer is then flowed by the through-hole 500 on the first connector 200 of the root concentric screen again
In second annulus space 120 of screen casing, setting in this way, so that packing fluid may not flow into the circulation in base tube 100 and lead to
Road.
Specifically, the first connector 200 and the second connector 300 are set in the outer wall of base tube 100, when two concentric screens
When being attached, the first connector 200 on first concentric screen can be with the second connector on second concentric screen
300 link together, and the base tube 100 in two concentric screens can link together.
Also, the first annulus space 110 is formed between the outer tube 400 and base tube 100 on each concentric screen；When two
When root concentric screen links together, base tube 100 after connection is the same as the first connector 200 and the on first concentric screen
The second connector 300 on two concentric screens forms the second annulus space 120.And pass through the first connector 200 and second
First annulus space 110 and the second annulus space 120 can be connected together by the through-hole 500 opened up on connector 300.?
When carrying out filling operation, the packing fluid containing pack gravel can be flowed out from packing tool, then flow into the first annulus space 110
Interior, then the first annulus space 110 in first concentric screen flows downward, and initially passes through on first concentric screen
Through-hole 500 on second connector 300 enters in the second annulus space 120, then again by second concentric screen
The first annulus space 110 that through-hole 500 on first connector 200 enters in second concentric screen continues to flow.
Specifically, offer filling mouth on outer tube 400, the packing fluid that is flowed out from packing tool can by filling mouth into
Enter to the first annulus space 110, the packing fluid in the first annulus space 110 can also flow into oil-well wall and outer by filling mouth
Between casing 400.
It should be pointed out that the base tube 100 of two concentric screens is tightly connected, sealing side when two concentric screen connections
Formula is unlimited, for example, elastic seal cartridge is arranged between two base tubes 100, when 200 He of the first connector on first concentric screen
When the second connector 300 on second concentric screen connects, the base tube 100 in two concentric screens can elasticity of compression sealing
Set, so that being tightly connected between two base tubes 100.
It should be pointed out that when connect more concentric screens, the first connector 200 of concentric screen is top, second
Connector 300 is lower part.
Referring to shown in Fig. 1 and Fig. 3, in the optinal plan of the present embodiment, the first connector 200 includes top connection 210 and upper
Pipe nipple 220；210 fixing sleeve of top connection is loaded on the first end of base tube 100, and upper 220 fixing sleeve of pipe nipple is loaded on top connection 210, through-hole
500 are provided on pipe nipple 220.
Specifically, first seal includes being set in the top connection 210 of 100 first end of base tube and being set in top connection 210
On upper pipe nipple 220.Upper pipe nipple 220 and base tube 100 are separately positioned on the both ends of the top connection 210.
When two concentric screens connect, in the top connection 210 and second concentric screen on first concentric screen
Base tube 100 connects, and completes the connection of two foundation pipes 100, and forms annulus space between upper pipe nipple 220 and base tube 100, this ring
Absolutely empty a part for the second annulus space 120.
Also, through-hole 500 is offered on upper pipe nipple 220, by this through-hole 500 by the first annulus space 110 and the second ring
Absolutely empty 120 connection.
In the optinal plan of the present embodiment, upper pipe nipple 220 is tightly connected with top connection 210.
Specifically, to be tightly connected between upper pipe nipple 220 and top connection 210, after guaranteeing two concentric screen connections, the borehole wall
The annular space formed between outer tube 400 is not connected to the second annulus space 120, and extraneous stone is avoided to block the second annulus space
120。
Referring to shown in Fig. 1 and Fig. 4, in the optinal plan of the present embodiment, the second connector 300 includes lower contact 310 under
Pipe nipple 320；310 fixing sleeve of lower contact is loaded on the second end of base tube 100, and lower 320 fixing sleeve of pipe nipple is loaded on lower contact 310, through-hole
500 are provided on lower pipe nipple 320.
Specifically, the second connector 300 includes being set in the lower contact 310 of 100 second end of base tube and being set in lower contact
Lower pipe nipple 320 on 310.
When two concentric screens connect, on the lower pipe nipple 320 and second concentric screen on first concentric screen
Upper pipe nipple 220 connects, and forms annulus space between base tube 100 after the two connection, this annulus space is the second annulus space
120。
Also, through-hole 500 is offered on lower pipe nipple 320, by this through-hole 500 by the first annulus space 110 and the second ring
Absolutely empty 120 connection.
In the optinal plan of the present embodiment, lower pipe nipple 320 is tightly connected with lower contact 310.
Specifically, to be tightly connected between lower pipe nipple 320 and lower contact 310, after guaranteeing two concentric screen connections, second
Annulus space 120 is not connected to the borehole wall with the annular space between outer tube 400, and extraneous stone is avoided to block the second annulus space 120.
Referring to fig. 2 and shown in Fig. 5, in the optinal plan of the present embodiment, the upper pipe nipple 220 on first concentric screen can
It is connect by box cupling 240 with the lower pipe nipple 320 on second concentric screen.
Specifically, can will be on the upper pipe nipple 220 and second concentric screen on first concentric screen by box cupling 240
Lower pipe nipple 320 link together, and connection type is simple, and manufacturing cost is low.
Referring to shown in Fig. 1, Fig. 2 and Fig. 5, in the optinal plan of the present embodiment, base tube 100 includes internal screen casing 130 in
Heart pipe 140；One end of internal screen casing 130 and top connection 210 are tightly connected, and the other end and lower contact 310 are tightly connected；Central tube
140 are tightly connected with lower contact 310.
Specifically, base tube 100 includes internal screen casing 130 and central tube 140, one end and the top connection 210 of internal screen casing 130
It is tightly connected, the other end and lower contact 310 are tightly connected, central tube 140 and the one end of lower contact 310 far from internal screen casing 130
Connection.
When two concentric screens connect, the central tube 140 on first concentric screen can be inserted on the second concentric screen
Upper pipe nipple 220 in, and connect with the top connection of second concentric screen 210, then the lower pipe nipple on first concentric screen
320 are connect by box cupling 240 with the upper pipe nipple 220 on second concentric screen.
Wherein, one end of internal screen casing 130 is connect by tubing thread with top connection 210, and the other end is by tubing thread under
Connector 310 connects, and it is reliable convenient to connect.
Referring to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, in the optinal plan of the present embodiment, top connection 210 is backwards to internal screen casing
130 one end offers the attachment base 230 being inserted into for central tube 140；The outer wall of the one end of central tube 140 far from lower contact 310
It is provided with sealing ring, central tube 140 is tightly connected by sealing ring and lower contact 310.
Specifically, attachment base 230 is provided in top connection 210, and when two concentric screens connect, first concentric screen
On central tube 140 can be inserted into the attachment base 230 in the top connection 210 on second concentric screen, facilitate staff to connect
Connect the central tube 140 of first concentric screen and the top connection 210 of second double-deck embassy.
In the optinal plan of the present embodiment, on the upper pipe nipple 220 and second concentric screen on first concentric screen
Lower pipe nipple 320 connect after, central tube 140 and attachment base 230 are tightly connected.
Specifically, it is arranged with sealing ring outside central tube 140, and after central tube 140 is inserted into attachment base 230, central tube 140
It is tightly connected with attachment base 230, when realizing two concentric screen connections, the base tube 100 inside the two is tightly connected.
Present embodiments provide a kind of concentric screen connection method, comprising the following steps: beat elevator in previous bilayer
On the upper pipe nipple 220 of screen casing, it is seated well head；Elevator is beaten on the upper pipe nipple 220 of latter concentric screen, and is sling；Afterwards
The lower pipe nipple 320 of a piece concentric screen is connect with the box cupling 240 on previous concentric screen, in latter at this time concentric screen
Heart pipe 140 can be automatically imported at the attachment base 230 of the top connection 210 of previous screen casing, tighten lower pipe nipple 320 and box cupling 240, complete
At the connection of two concentric screens.Using the concentric screen connection method, while realizing that two concentric screens are reliably connected,
Also make packing fluid may not flow into the circulation passage in base tube 100, guarantees to also ensure concentric screen while leakproofness
Circulation.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of concentric screen characterized by comprising base tube (100), the first connector (200), the second connector (300)
With outer tube (400)；
First connector (200) and the second connector (300) fixing sleeve are loaded on the base tube (100), and described the
A connection piece (200) and second connector (300) are arranged along the axially spaced-apart of the base tube (100)；
One end of the outer tube (400) is connect with first connector (200), the other end and second connector
(300) it connects, and forms the first annulus space (110) between the outer tube (400) and the base tube (100)；
After the connection of two concentric screens, on the first connector (200) and second concentric screen on first concentric screen
Second connector (300) connects and forms the first cylinder, the base tube (100) on first concentric screen and second concentric screen
On base tube (100) be tightly connected formed the second cylinder, form the second annular space between first cylinder and second cylinder
Space (120)；
It is offered on first connector (200) and second connector (300) empty for being connected to first annular space
Between (110) and second annulus space (120) through-hole (500).
2. concentric screen according to claim 1, which is characterized in that first connector (200) includes top connection
(210) and upper pipe nipple (220)；
Top connection (210) fixing sleeve is loaded on the first end of the base tube (100), and upper pipe nipple (220) fixing sleeve is loaded on
The top connection (210), the through-hole (500) are provided on the upper pipe nipple (220).
3. concentric screen according to claim 2, which is characterized in that the upper pipe nipple (220) and the top connection (210)
It is tightly connected.
4. concentric screen according to claim 2, which is characterized in that second connector (300) includes lower contact
(310) and lower pipe nipple (320)；
Lower contact (310) fixing sleeve is loaded on the second end of the base tube (100), and lower pipe nipple (320) fixing sleeve is loaded on
The lower contact (310), the through-hole (500) are provided on the lower pipe nipple (320).
5. concentric screen according to claim 4, which is characterized in that the lower pipe nipple (320) and the lower contact (310)
It is tightly connected.
6. concentric screen according to claim 4, which is characterized in that the upper pipe nipple on first concentric screen
(220) it can be connect by box cupling (240) with the lower pipe nipple (320) on second concentric screen.
7. concentric screen according to claim 6, which is characterized in that the base tube (100) includes being arranged in the axial direction
Inside screen casing (130) and central tube (140)；
One end and the top connection (210) of the internal screen casing (130) are tightly connected, the other end and the lower contact (310)
It is tightly connected；
The central tube (140) is tightly connected by the lower contact (310) and the internal screen casing (130).
8. concentric screen according to claim 7, which is characterized in that the top connection (210) is backwards to the internal screen casing
(130) one end offers the attachment base (230) for the central tube (140) insertion；
The outer wall of the one end of the central tube (140) far from the lower contact (310) is provided with sealing ring, the central tube
(140) it is tightly connected by the sealing ring and the lower contact (310).
9. concentric screen according to claim 8, which is characterized in that the upper pipe nipple on first concentric screen
(220) after being connect with the lower pipe nipple (320) on second concentric screen, the central tube (140) and the attachment base
(230) it is tightly connected.
10. a kind of concentric screen connection method, which comprises the following steps:
Elevator is beaten on the upper pipe nipple (220) of previous concentric screen, well head is seated；
Elevator is beaten on the upper pipe nipple (220) of latter concentric screen, and is sling；
The lower pipe nipple (320) of latter concentric screen is connect with the box cupling (240) on previous concentric screen, and latter at this time double
At the attachment base (230) for the top connection (210) that the central tube (140) of layer screen casing can be automatically imported previous screen casing, tighten down short
(320) and box cupling (240) are saved, the connection of two concentric screens is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653965.3A CN110259419B (en) | 2019-07-18 | 2019-07-18 | Double-layer sieve tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653965.3A CN110259419B (en) | 2019-07-18 | 2019-07-18 | Double-layer sieve tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110259419A true CN110259419A (en) | 2019-09-20 |
| CN110259419B CN110259419B (en) | 2021-09-28 |
Family
ID=67927206
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910653965.3A Active CN110259419B (en) | 2019-07-18 | 2019-07-18 | Double-layer sieve tube |
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| CN (1) | CN110259419B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233247A (en) * | 2021-12-10 | 2022-03-25 | 中海石油(中国)有限公司 | Variable density sieve tube water control device applied to deepwater gas reservoir |
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| US3638970A (en) * | 1968-02-12 | 1972-02-01 | Becker Drilling Alberta Ltd | Joint for double-walled drill pipe |
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| CN108979591A (en) * | 2018-09-14 | 2018-12-11 | 大港油田集团有限责任公司 | A kind of two-tube overflow means |
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| CN201568032U (en) * | 2009-12-16 | 2010-09-01 | 濮阳市信宇石油机械化工有限公司 | Double-layer filter sieve tube |
| WO2011075045A1 (en) * | 2009-12-18 | 2011-06-23 | Wassara Ab | An arrangement for joining double-walled drill rods and double-walled drill rod |
| CN103470195A (en) * | 2013-10-08 | 2013-12-25 | 刘铁 | High-temperature resisting and high-pressure resisting injecting and extracting integrated double-layer hollow sucker rod |
| CN104499965A (en) * | 2014-11-24 | 2015-04-08 | 中国石油天然气股份有限公司 | Sand washing concentric tube for low-pressure absorption well and assembling method of sand washing concentric tube |
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| CN105909196A (en) * | 2016-04-22 | 2016-08-31 | 中国海洋石油总公司 | Double-layer pipe unit in sand washover process |
| CN106894769A (en) * | 2017-03-06 | 2017-06-27 | 中国石油大学(华东) | A kind of fast joint type double-layer drill rod |
| CN108979591A (en) * | 2018-09-14 | 2018-12-11 | 大港油田集团有限责任公司 | A kind of two-tube overflow means |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114233247A (en) * | 2021-12-10 | 2022-03-25 | 中海石油(中国)有限公司 | Variable density sieve tube water control device applied to deepwater gas reservoir |
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| CN110259419B (en) | 2021-09-28 |
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