CN110259419B - Double-layer sieve tube - Google Patents
Double-layer sieve tube Download PDFInfo
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- CN110259419B CN110259419B CN201910653965.3A CN201910653965A CN110259419B CN 110259419 B CN110259419 B CN 110259419B CN 201910653965 A CN201910653965 A CN 201910653965A CN 110259419 B CN110259419 B CN 110259419B
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- double
- pipe
- screen
- connecting piece
- annular space
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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
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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
- 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
Abstract
The invention provides a double-layer sieve tube, which relates to the technical field of well completion and comprises a base tube, a first connecting piece, a second connecting piece and an outer sleeve; the first connecting piece and the second connecting piece are fixedly sleeved on the base pipe and are arranged at intervals along the axial direction of the base pipe. One end of the outer sleeve is connected with the first connecting piece, the other end of the outer sleeve is connected with the second connecting piece, and a first annular space is formed between the outer sleeve and the base pipe; after the two double-layer sieve tubes are connected, a first connecting piece on the first double-layer sieve tube is connected with a second connecting piece on the second double-layer sieve tube to form a first cylinder body, a base tube on the first double-layer sieve tube is in sealing connection with a base tube on the second double-layer sieve tube to form a second cylinder body, and a second annular space is formed between the first cylinder body and the second cylinder body; through holes used for communicating the first annular space with the second annular space are formed in the first connecting piece and the second connecting piece. The technical effect of good connection connectivity of the double-layer sieve tube is achieved.
Description
Technical Field
The invention relates to the technical field of well completion, in particular to a double-layer sieve tube.
Background
In gravel packing sand control of open-hole wells such as deep water oil and gas wells or long horizontal wells, due to the influence of environmental conditions, local borehole irregularity, stratum collapse or early sand bridge phenomena are easily caused in the high-speed packing process to form barriers, so that partial well sections are incompletely packed, damage is easily caused, and the service life of well completion is shortened.
The connection mode of the sand control screen pipe in the prior art is that base pipes or short joint parts of an upper screen pipe and a lower screen pipe are connected through a coupling, or the base pipes of the upper screen pipe and the lower screen pipe are provided with oil pipe buckles or connected with short joints and then connected through the coupling. However, when the inner and outer double-layer sieve tubes are respectively connected, the connectivity and the sealing performance of the annular channel between the double-layer sieve tubes are ensured, and the connection mode in the prior art cannot realize the mutual connectivity of the annular channel of the whole system.
Therefore, providing a double-layer screen with good connectivity is an important technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a double-layer sieve tube to solve the technical problem that the double-layer sieve tubes cannot be communicated with each other in the prior art.
In a first aspect, an embodiment of the present invention provides a double-layer screen pipe, including a base pipe, a first connector, a second connector, and an outer sleeve;
the first connecting piece and the second connecting piece are fixedly sleeved on the base pipe and are arranged at intervals along the axial direction of the base pipe;
one end of the outer sleeve is connected with the first connecting piece, the other end of the outer sleeve is connected with the second connecting piece, and a first annular space is formed between the outer sleeve and the base pipe;
after the two double-layer sieve tubes are connected, a first connecting piece on the first double-layer sieve tube is connected with a second connecting piece on the second double-layer sieve tube to form a first cylinder, a base tube on the first double-layer sieve tube is in sealing connection with a base tube on the second double-layer sieve tube to form a second cylinder, and a second annular space is formed between the first cylinder and the second cylinder;
and through holes for communicating the first annular space with the second annular space are formed in the first connecting piece and the second connecting piece.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the first connecting element includes an upper joint and an upper short section;
the upper joint is fixedly sleeved at the first end of the base pipe, the upper short section is fixedly sleeved at the upper joint, and the through hole is formed in the upper short section.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the upper short section is connected to the upper joint in a sealing manner.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the second connection component includes a lower joint and a lower short section;
the lower joint is fixedly sleeved at the second end of the base pipe, the lower short section is fixedly sleeved at the lower joint, and the through hole is formed in the lower short section.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the lower sub is connected to the lower joint in a sealing manner.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the upper short joint on the first double-layer screen can be connected with the lower short joint on the second double-layer screen through a coupling.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the base pipe includes an inner screen and a center pipe disposed along an axial direction;
one end of the inner sieve tube is hermetically connected with the upper joint, and the other end of the inner sieve tube is hermetically connected with the lower joint;
the central pipe is connected with the inner sieve pipe in a sealing mode through the lower connector.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an end of the upper joint, which faces away from the inner screen pipe, is provided with a connection seat into which the base pipe is inserted;
the outer wall of the center tube, which is far away from one end of the lower joint, is provided with a sealing ring, and the center tube is connected with the lower joint in a sealing manner through the sealing ring.
In combination with the first aspect, embodiments of the present invention provide a possible implementation manner of the first aspect, wherein the base pipe is sealingly connected to the connection seat after the upper short section of the first double-layer screen is connected to the lower short section of the second double-layer screen.
Has the advantages that:
the invention provides a double-layer sieve tube which comprises a base tube, a first connecting piece, a second connecting piece and an outer sleeve; the first connecting piece and the second connecting piece are sleeved on the outer wall of the base tube; one end of the outer sleeve is sleeved on the outer wall of the first connecting piece, the other end of the outer sleeve is sleeved on the outer wall of the second connecting piece, and a first annular space is formed between the outer sleeve and the base tube; after the two double-layer sieve tubes are connected, a first connecting piece on the first double-layer sieve tube is connected with a second connecting piece on the second double-layer sieve tube to form a first cylinder body, a base tube on the first double-layer sieve tube is in sealing connection with a base tube on the second double-layer sieve tube to form a second cylinder body, and a second annular space is formed between the first cylinder body and the second cylinder body; through holes used for communicating the first annular space with the second annular space are formed in the first connecting piece and the second connecting piece.
When the double-layer sieve tube is used, the first double-layer sieve tube is fixed at a wellhead, then a second connecting piece of the second double-layer sieve tube is connected with a first connecting piece of the first double-layer sieve tube to form a first cylinder body, meanwhile, base tubes in the first double-layer sieve tube and the second double-layer sieve tube are connected together to form a second cylinder body, so that the inside circulation channels of the base tubes in the two double-layer sieve tubes are communicated, and the first annular space and the second annular space can be communicated through holes in the first connecting piece and the second connecting piece. When filling liquid fills the work, fill liquid can flow into in the second annular space through the through-hole on the second connecting piece in the first annular space of first double-deck screen pipe, then flow into the second annular space of second double-deck screen pipe through the through-hole on the first connecting piece of this double-deck screen pipe again, through such setting for fill liquid can not flow into the circulation passageway in the parent tube. Therefore, when the double-layer screen pipes are connected, filling liquid can flow into the other double-layer screen pipe from one double-layer screen pipe through the first annular space and the second annular space without flowing into a flow passage of the base pipe, and the connectivity of the double-layer screen pipes during connection is completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a cross-sectional structural view of a double-deck screen according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of a double-layer screen with another double-layer screen attached to the screen according to an embodiment of the present invention;
FIG. 3 is a partial cross-sectional structural view of a double screen according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of another embodiment of a dual layer screen;
FIG. 5 is a partial cross-sectional view of a double screen in an embodiment of the present invention about to be inserted into another double screen.
Icon:
100-base pipe; 110 — a first annular space; 120-a second annular space; 130-inner screen; 140-a central tube;
200-a first connector; 210-upper joint; 220-upper short section; 230-a connecting seat; 240-collar;
300-a second connector; 310-lower joint; 320-lower short section;
400-outer sleeve;
500-through hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently attached, removably attached, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Referring to fig. 1 to 5, the present embodiment provides a double-layered screen, including a base pipe 100, a first connector 200, a second connector 300, and an outer sleeve 400; the first connecting piece 200 and the second connecting piece 300 are fixedly sleeved on the base pipe 100, and the first connecting piece 200 and the second connecting piece 300 are arranged at intervals along the axial direction of the base pipe 100; one end of the outer sleeve 400 is connected to the first connector 200 and the other end is connected to the second connector 300, and a first annular space 110 is formed between the outer sleeve 400 and the base pipe 100.
Referring to fig. 1 again, after the two double-layer screen pipes are connected, the first connecting member 200 on the first double-layer screen pipe is connected with the second connecting member 300 on the second double-layer screen pipe to form a first cylinder, the base pipe 100 on the first double-layer screen pipe is connected with the base pipe 100 on the second double-layer screen pipe in a sealing manner to form a second cylinder, and a second annular space 120 is formed between the first cylinder and the second cylinder; the first connecting member 200 and the second connecting member 300 are both provided with through holes 500 for communicating the first annular space 110 with the second annular space 120.
Referring to fig. 1 and 5, in use, a first double-layer screen is fixed at the wellhead, and then a second connector 300 of a second double-layer screen is connected with the first connector 200 of the first double-layer screen to form a first cylinder, and meanwhile, the base pipes 100 in the first double-layer screen and the second double-layer screen are connected together to form a second cylinder, so that the internal circulation channels of the base pipes 100 in the two double-layer screens are communicated, and the first annular space 110 and the second annular space 120 can be communicated through the through holes 500 on the first connector 200 and the second connector 300. When the filling fluid is filled, the filling fluid can flow from the first annular space 110 of the first double-layer screen into the second annular space 120 through the through holes 500 of the second connecting member 300 and then into the second annular space 120 of the second double-layer screen through the through holes 500 of the first connecting member 200 of the double-layer screen, so that the filling fluid cannot flow into the flow passage in the base pipe 100.
Specifically, the first connector 200 and the second connector 300 are sleeved on the outer wall of the base pipe 100, when two double-layer screen pipes are connected, the first connector 200 on the first double-layer screen pipe can be connected with the second connector 300 on the second double-layer screen pipe, and the base pipes 100 in the two double-layer screen pipes can be connected together.
Moreover, a first annular space 110 is formed between the outer sleeve 400 on each double-layer screen pipe and the base pipe 100; when two double screens are joined together, the joined basepipe 100 forms a second annular void space 120 with the first connector 200 on the first double screen and the second connector 300 on the second double screen. The first annular space 110 and the second annular space 120 can be communicated with each other through the through holes 500 formed in the first connection member 200 and the second connection member 300. During the packing operation, the packing fluid containing the gravel pack flows out of the packing tool, then flows into the first annular space 110, then flows down the first annular space 110 in the first double-deck screen, first passes through the through-holes 500 of the second connector 300 of the first double-deck screen into the second annular space 120, and then passes through the through-holes 500 of the first connector 200 of the second double-deck screen into the first annular space 110 of the second double-deck screen to continue flowing.
Specifically, the outer sleeve 400 is provided with a filling port, the filling fluid flowing out from the filling tool can enter the first annular space 110 through the filling port, and the filling fluid in the first annular space 110 can also flow into the space between the well wall and the outer sleeve 400 through the filling port.
It should be noted that, when two double-layer screen pipes are connected, the base pipes 100 of the two double-layer screen pipes are connected in a sealing manner, but the sealing manner is not limited, for example, an elastic sealing sleeve is arranged between the two base pipes 100, and when the first connecting member 200 on the first double-layer screen pipe is connected with the second connecting member 300 on the second double-layer screen pipe, the base pipes 100 in the two double-layer screen pipes compress the elastic sealing sleeve, so that the two base pipes 100 are connected in a sealing manner.
It should be noted that when a plurality of double-screen pipes are connected, the first connector 200 of the double-screen pipe is an upper portion and the second connector 300 is a lower portion.
Referring to fig. 1 and 3, in an alternative of the present embodiment, the first connector 200 includes an upper joint 210 and an upper short joint 220; the upper joint 210 is fixedly sleeved at the first end of the base pipe 100, the upper nipple 220 is fixedly sleeved at the upper joint 210, and the through hole 500 is formed in the upper nipple 220.
Specifically, the first sealing element includes an upper joint 210 sleeved on a first end of the base pipe 100 and an upper short joint 220 sleeved on the upper joint 210. The upper nipple 220 and the base pipe 100 are respectively arranged at two ends of the upper joint 210.
When two double-layer screens are connected, the upper joint 210 on the first double-layer screen is connected with the base pipe 100 on the second double-layer screen to complete the connection of the two base pipes 100, and an annular space is formed between the upper short joint 220 and the base pipe 100, and the annular space is a part of the second annular space 120.
Furthermore, the upper nipple 220 is provided with a through hole 500, and the first annular space 110 and the second annular space 120 are communicated through the through hole 500.
In an alternative of this embodiment, the upper nipple 220 is sealingly connected to the upper joint 210.
Specifically, go up for sealing connection between nipple 220 and the top connection 210, guarantee that two double-deck screen pipe connect the back, the annular space that forms between the wall of a well and the outer tube 400 does not communicate with second annular empty space 120, avoids external stone to block up second annular empty space 120.
Referring to fig. 1 and 4, in an alternative of the present embodiment, the second connection member 300 includes a lower joint 310 and a lower nipple 320; the lower joint 310 is fixedly sleeved at the second end of the base pipe 100, the lower nipple 320 is fixedly sleeved at the lower joint 310, and the through hole 500 is formed in the lower nipple 320.
Specifically, the second connector 300 includes a lower joint 310 sleeved on the second end of the base pipe 100 and a lower nipple 320 sleeved on the lower joint 310.
When two double-layer screen pipes are connected, the lower short joint 320 on the first double-layer screen pipe is connected with the upper short joint 220 on the second double-layer screen pipe, and an annular space is formed between the two connected short joints and the base pipe 100, wherein the annular space is the second annular space 120.
Furthermore, the lower nipple 320 is provided with a through hole 500, and the first annular space 110 and the second annular space 120 are communicated through the through hole 500.
In an alternative of this embodiment, the lower sub 320 is sealingly connected to the lower sub 310.
Specifically, lower nipple 320 and lower nipple 310 are in sealing connection, and after two double-layer screen pipes are connected, second annular space 120 is not communicated with the annular space between the well wall and outer sleeve 400, so that the second annular space 120 is prevented from being blocked by external stones.
Referring to fig. 2 and 5, in an alternative embodiment, the upper nipple 220 of the first double-layer screen can be connected with the lower nipple 320 of the second double-layer screen by a coupling 240.
Specifically, the upper short joint 220 on the first double-layer screen pipe and the lower short joint 320 on the second double-layer screen pipe can be connected together through the coupling 240, and the connection mode is simple and the manufacturing cost is low.
Referring to fig. 1, 2 and 5, in an alternative version of this embodiment, the base pipe 100 includes an inner screen 130 and a center pipe 140; one end of the inner screen 130 is hermetically connected with the upper joint 210, and the other end is hermetically connected with the lower joint 310; the center tube 140 is sealingly connected to the lower joint 310.
Specifically, the base pipe 100 includes an inner screen 130 and a center pipe 140, the inner screen 130 having one end sealingly connected to the upper joint 210 and the other end sealingly connected to the lower joint 310, the center pipe 140 being connected to the lower joint 310 at an end remote from the inner screen 130.
When two double screens are connected, the base pipe 140 of the first double screen is inserted into the upper nipple 220 of the second double screen and connected to the upper joint 210 of the second double screen, and then the lower nipple 320 of the first double screen is connected to the upper nipple 220 of the second double screen by the coupling 240.
Wherein, one end of the inner screen pipe 130 is connected with the upper joint 210 through the tubing buckle, and the other end is connected with the lower joint 310 through the tubing buckle, so the connection is reliable and convenient.
Referring to fig. 1, 2, 3 and 5, in an alternative embodiment, an end of the upper joint 210 facing away from the inner screen 130 is provided with a connecting seat 230 for inserting the base pipe 140; the outer wall of the end of the central tube 140 away from the lower joint 310 is provided with a sealing ring, and the central tube 140 is connected with the lower joint 310 in a sealing way through the sealing ring.
Specifically, the top joint 210 is provided with a connecting base 230, when two double-layer screens are connected, the base pipe 140 of the first double-layer screen is inserted into the connecting base 230 of the top joint 210 of the second double-layer screen, which is convenient for a worker to connect the base pipe 140 of the first double-layer screen and the top joint 210 of the second double-layer screen.
In an alternative embodiment, the base pipe 140 is sealingly connected to the coupling seat 230 after the top sub 220 of the first double-deck screen is connected to the bottom sub 320 of the second double-deck screen.
Specifically, the outer sleeve of the central pipe 140 is provided with a sealing ring, and after the central pipe 140 is inserted into the connecting base 230, the central pipe 140 is hermetically connected with the connecting base 230, so that when two double-layer sieve pipes are connected, the base pipes 100 inside the central pipe 140 and the connecting base are hermetically connected.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A double screen, comprising: a base pipe (100), a first connector (200), a second connector (300) and an outer sleeve (400);
the first connecting piece (200) and the second connecting piece (300) are fixedly sleeved on the base pipe (100), and the first connecting piece (200) and the second connecting piece (300) are arranged at intervals along the axial direction of the base pipe (100);
one end of the outer sleeve (400) is connected with the first connector (200), the other end of the outer sleeve is connected with the second connector (300), and a first annular space (110) is formed between the outer sleeve (400) and the base pipe (100);
after the two double-layer screen pipes are connected, a first connecting piece (200) on the first double-layer screen pipe is connected with a second connecting piece (300) on the second double-layer screen pipe to form a first cylinder, a base pipe (100) on the first double-layer screen pipe is connected with a base pipe (100) on the second double-layer screen pipe in a sealing mode to form a second cylinder, and a second annular space (120) is formed between the first cylinder and the second cylinder;
through holes (500) used for communicating the first annular space (110) with the second annular space (120) are formed in the first connecting piece (200) and the second connecting piece (300).
2. The double-deck screen pipe as claimed in claim 1, wherein the first connector (200) comprises an upper joint (210) and an upper nipple (220);
the upper joint (210) is fixedly sleeved at the first end of the base pipe (100), the upper short section (220) is fixedly sleeved at the upper joint (210), and the through hole (500) is formed in the upper short section (220).
3. The double-deck screen pipe according to claim 2, wherein the upper nipple (220) is sealingly connected to the upper joint (210).
4. The double-deck screen pipe as claimed in claim 2, wherein the second connector (300) comprises a lower sub (310) and a lower sub (320);
the lower joint (310) is fixedly sleeved at the second end of the base pipe (100), the lower nipple (320) is fixedly sleeved at the lower joint (310), and the through hole (500) is formed in the lower nipple (320).
5. The double-deck screen pipe according to claim 4, wherein the lower nipple (320) is sealingly connected to the lower joint (310).
6. The double-deck screen according to claim 4, wherein the upper nipple (220) of a first double-deck screen is connectable to the lower nipple (320) of a second double-deck screen by a coupling (240).
7. The double-layered screen according to claim 6, wherein the base pipe (100) comprises an inner screen (130) and a center pipe (140) arranged in an axial direction;
one end of the inner screen pipe (130) is connected with the upper joint (210) in a sealing way, and the other end of the inner screen pipe is connected with the lower joint (310) in a sealing way;
the base pipe (140) is sealingly connected to the inner screen (130) by the lower sub (310).
8. The double-deck screen pipe as claimed in claim 7, wherein an end of the upper joint (210) facing away from the inner screen pipe (130) is provided with a coupling seat (230) into which the base pipe (140) is inserted;
the outer wall of one end, away from the lower joint (310), of the central pipe (140) is provided with a sealing ring, and the central pipe (140) is connected with the lower joint (310) in a sealing mode through the sealing ring.
9. The double-deck screen of claim 8, wherein the base pipe (140) is sealingly connected to the coupling seat (230) after the upper nipple (220) of a first double-deck screen is connected to the lower nipple (320) of a second double-deck screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910653965.3A CN110259419B (en) | 2019-07-18 | 2019-07-18 | Double-layer sieve tube |
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| CN201910653965.3A CN110259419B (en) | 2019-07-18 | 2019-07-18 | Double-layer sieve tube |
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| CN110259419B true CN110259419B (en) | 2021-09-28 |
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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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| 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 |
| 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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| CN110259419A (en) | 2019-09-20 |
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