CN209959218U - Adaptive control screen pipe - Google Patents
Adaptive control screen pipe Download PDFInfo
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- CN209959218U CN209959218U CN201920486387.4U CN201920486387U CN209959218U CN 209959218 U CN209959218 U CN 209959218U CN 201920486387 U CN201920486387 U CN 201920486387U CN 209959218 U CN209959218 U CN 209959218U
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Abstract
The utility model relates to a self-adaptation control screen pipe. The technical scheme is as follows: the concentric double-pipe structure of the core pipe and the outer cylinder is adopted, and an annular valve is arranged between the annular space of the core pipe and the outer cylinder. The core tube and the outer tube are divided into an upper section and a lower section respectively, a gap or a hole is arranged on the tube wall of one section, the other section is used as a sealing section, the sealing section of the core tube and the sealing section of the outer tube are arranged in a staggered mode in different sides, and the outer wall of the core tube is provided with a limiting step. When the pressure in the core pipe is higher than the external pressure of the outer barrel, the pressure in the core pipe pushes the annular valve to move to the position of the limiting step, and the sealing section of the core pipe, the annular valve and the sealing surface of the outer barrel are combined together to form the oil pipe function of the internal pressure-bearing sealing system; when the external pressure of the outer barrel is greater than the internal pressure of the core pipe, the external pressure pushes the annular valve to be far away from the limiting step, the gap or hole of the outer barrel is communicated with the gap or hole of the core pipe to form a circulation channel, fluid outside the tool automatically enters the core pipe, and the gap or hole has the function of blocking sand with large particle size or a sieve pipe with large solid.
Description
Technical Field
The utility model relates to a petroleum industry well completion engineering field, in particular to self-adaptation control screen pipe.
Background
At present, in newly-increased exploratory reserves of oil fields, nearly 80% of the reserves are low-permeability oil and gas reservoirs and heavy oil and gas reservoirs, the geological conditions of the oil and gas reservoirs are more and more complex, and the effective, efficient and long-acting utilization of the oil and gas reservoirs becomes a world-level problem.
For low-permeability oil reservoirs, in order to reduce seepage resistance and effectively communicate with reservoirs, long-interval and open-hole horizontal well completion is mostly adopted, and the improvement is carried out by adding a multi-stage stratified fracturing or filling sand prevention mode. This development process also has the following problems: the fracturing sliding sleeve is used as a channel for fracturing fluid to enter a reservoir stratum and reform the reservoir stratum and also used as a production channel, namely a gas flow or liquid flow channel between the reservoir stratum and a shaft. Because the opening of the fracturing sliding sleeve is large, when airflow or liquid flow enters, filling sand and formation debris near a shaft can be carried into the shaft to block an oil pipe channel; particularly, with the progress of production, the formation energy is reduced, the well wall collapse is aggravated, more and large formation fragments can be brought by airflow or liquid flow to enter an oil pipe, the well bore of the horizontal well with a long well section is seriously blocked and is difficult to be untied, and the long-term production of the oil-gas well is greatly influenced.
For heavy oil reservoirs, in order to reduce seepage resistance and effectively communicate reservoirs, the development of long-well section and open-hole horizontal wells is suitable, but the development is limited by the functions of the existing sieve tube, the sand control can be realized only by adopting upper forward or bottom reverse cage packing, and the quality of the cage packing sand control is poor under the condition of the long-well section; meanwhile, in the implementation of the open hole horizontal well process, an artificial well wall is needed for ensuring that the well completion sieve tube enters the open hole well again after drilling, mud cakes need to be washed with acid after the sieve tube is put in, the artificial well wall is eliminated, the artificial well wall collapses, and then the general filling sand control is carried out, so that the effect is worse.
Disclosure of Invention
The utility model aims at providing an above-mentioned defect to prior art exists provides a self-adaptation control screen pipe, forms the long-shaft section barefoot horizontal well multistage staged fracturing or the sand control technology that fills that the multistage is transformed section by section, realizes effective, high-efficient, the long-term usefulness of hyposmosis oil gas reservoir, viscous crude oil reservoir.
The utility model provides a self-adaptation control screen pipe, its technical scheme is: the method is characterized in that a concentric double-tube structure of a core tube (1) and an outer tube (3) is adopted, an annular valve (5) is arranged between the annular space of the core tube (1) and the outer tube (3), the core tube (1) and the outer tube (3) are divided into an upper section and a lower section respectively, a first gap or hole (4) is arranged on the tube wall of one section, a sealing section is arranged on the other section, the sealing sections of the core tube (1) and the outer tube (3) are arranged in a staggered mode in different sides, and a limiting step (12) is arranged on the outer wall of the core tube; when the pressure in the core pipe (1) is greater than the external pressure of the outer barrel (3), the pressure in the core pipe (1) is transmitted between the core pipe and the outer barrel (3) through a first gap or hole of the core pipe (1), the annular valve (5) is pushed to move to the position of the limiting step (12), the core pipe sealing section, the annular valve and the outer barrel sealing surface are combined together to form an internal pressure-bearing sealing system, and at the moment, the internal pressure bearing and internal pressure of the oil pipe can be transmitted up and down; when the external pressure of the outer barrel (3) is greater than the internal pressure of the core pipe (1), the external pressure is transmitted between the core pipe (1) and the outer barrel (3) through a second gap or hole of the outer barrel (3), the annular valve (5) is pushed to be far away from the position of the limiting step (12), the second gap or hole of the outer barrel, the first gap or hole of the core pipe and the annular of the core pipe and the outer barrel are combined together to form a circulation channel, external fluid enters the inside of the core pipe (1), and the second gap or hole blocks sand with large particle size or a sieve pipe function of large solid.
Preferably, the core tube (1) and the outer tube (3) are divided into an upper section and a lower section respectively, a first gap or hole (4) is formed in the upper section of the tube wall of the core tube (1), a sealing section is formed in the lower section of the tube wall of the core tube (1), a sealing section is formed in the upper section of the tube wall of the outer tube (3), a second gap or hole (8) is formed in the lower section of the tube wall, so that a staggered structure is formed, and a limiting step (12) is arranged on the outer wall of the core tube (1).
Preferably, the core tube (1) and the outer tube (3) are divided into an upper section and a lower section respectively, a first gap or hole (4) is formed in the lower section of the tube wall of the core tube (1), a sealing section is formed in the upper section of the tube wall of the core tube (1), a sealing section is formed in the lower section of the tube wall of the outer tube (3), a second gap or hole (8) is formed in the upper section of the tube wall, so that a staggered structure is formed, and a lower limiting support (13) is arranged at the lower ends of the core tube (1) and the outer tube (3); the outer wall of the core pipe (1) is provided with a limiting step (12).
Preferably, the annulus between the core tube (1) and the outer cylinder (3) is divided into an isolated annulus (9) and a liquid passing annulus (10) by an annulus valve (5).
Preferably, the annular valve (5) adopts an annular piston, the inner wall and the outer wall of the annular piston are respectively provided with a second sealing ring (6) and a third sealing ring (7), the annular piston is sealed with the outer wall of the core pipe (1) through the second sealing ring (6), and is sealed with the inner wall of the outer barrel (3) through the third sealing ring (7).
Preferably, the annular valve (5) adopts an annular sliding sleeve, and the inner wall and the outer wall of the annular sliding sleeve are respectively matched with the outer wall of the core pipe (1) and the inner wall of the outer barrel (3) through mechanical sealing.
The beneficial effects of the utility model are specifically as follows:
1. in the design method, the performance characteristics of the oil pipe and the sieve pipe are innovatively combined, and a single tool not only realizes the function of the oil pipe for transmitting power and kinetic energy in the pipe, but also realizes the function of the sieve pipe for blocking sand and preventing sand when the stratum is communicated with the shaft;
2. in structural design, a combination of an inner double-layer pipe and an outer double-layer pipe, wherein the upper part and the lower part of the inner double-layer pipe are provided with holes or seams or seals, and the position of an annular valve is controlled by liquid flow/air flow pressure in different directions, so that the switching of the switching function of the whole tool is realized. When the oil pipe function for transmitting internal pressure required by well completion engineering is closed, the sieve pipe function for blocking sand and preventing sand when oil gas production is started is realized;
3. the requirement of integrating the staged fracturing modification and the screen pipe sand prevention process is realized, the problem that the sand can not be effectively blocked and prevented after the existing staged fracturing modification is effectively solved, and the requirement of long-term development of a low-permeability oil reservoir is met;
4. the same process pipe column is applied to the multilayer-section layered filling sand prevention process of the sandstone reservoir, so that the layered filling sand prevention of more intervals of sandstone reservoir oil and gas wells with longer well sections and high-difficulty wells such as horizontal wells, branch wells and the like can be realized, the filling quality is good, and the service life of the sand prevention well is long; the layered sand control does not need the matching of an inner pipe, an inner filling tool and the like, and the construction is simpler and safer. The problem that the filling quality is poor in conventional filling due to collapse of an artificial well wall after acid-washing mud cakes of the sandstone reservoir open-hole horizontal well are drained back is effectively solved;
5. the layered section filling sand control process pipe column can also realize the functions of flushing while lowering, and effectively solves the problems that the screen pipe is obstructed when the sand is produced in the stratum, and the complex wells such as horizontal wells, branch wells and the like are difficult to lower and are not in place.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention as an oil pipe function;
FIG. 2 is a schematic structural view showing a first embodiment of the present invention as a sieve tube;
FIG. 3 is a schematic diagram of the section 1 reconstruction in the sectional reconstruction of the process pipe column structure applied to the integration of fracturing/filling and sand prevention of an open hole horizontal well;
FIG. 4 is a schematic diagram of the utility model applied to the production of the fracturing/filling sand prevention integrated process pipe column of the open hole horizontal well;
fig. 5 is a schematic structural view of a second embodiment of the present invention as a function of an oil pipe;
FIG. 6 is a schematic view of a second embodiment of the present invention, showing the function of the screen;
in the upper diagram: the device comprises a core pipe 1, a first sealing ring 2, an outer cylinder 3, a first gap or hole 4, an annular valve 5, a second sealing ring 6, a third sealing ring 7, a second gap or hole 8, an isolation annular 9, a liquid passing annular 10, an upper limiting step 11, a limiting step 12, a lower limiting support 13, a fourth sealing ring 14 and a fifth sealing ring 15;
casing a1, guide wire plug a2, 1 st gate-off modification sliding sleeve a3, 1 st adaptive control screen a4, 1 st open-hole packer a5, 2 nd gate-off modification sliding sleeve a6, 2 nd adaptive control screen a7, 2 nd open-hole packer a8, N th gate-off modification sliding sleeve a9, N nd adaptive control screen a10, N th open-hole packer a11, lower oil pipe a12, suspension packer a13 and upper oil pipe a 14.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Wherein, the annulus between the core tube 1 and the outer cylinder 3 is divided into an isolated annulus 9 and a liquid passing annulus 10 by an annulus valve 5; in addition, one end of the isolation annular space 9 is provided with an upper limit step 11 with a conical structure, and the other end is provided with a raised limit step 12.
In addition, the annular valve 5 adopts an annular piston, the inner wall and the outer wall of the annular piston are respectively provided with a second sealing ring 6 and a third sealing ring 7, the annular piston is sealed with the outer wall of the core pipe 1 through the second sealing ring 6, and is sealed with the inner wall of the outer barrel 3 through the third sealing ring 7.
The utility model provides a use method of self-adaptation control screen pipe, its technical scheme is: the method comprises the following two using processes:
1, oil pipe function: when the pressure of liquid or gas in the self-adaptive control sieve tube is higher than that of the liquid or gas outside the self-adaptive control sieve tube, the pressure in the oil tube pushes the annular valve 5 to descend to the position of the limiting step 12 in the isolated annular 9 through the first gap or hole 4 on the upper part of the core tube 1, so that the core tube 1, the annular valve 5 and the outer tube 3 form a closed space to prevent liquid flow or air flow from overflowing from the self-adaptive control sieve tube, and the liquid flow or the air flow can only descend along the inner wall of the core tube to play a role of the oil tube;
2, the sieve tube functions are as follows: when the pressure of liquid or gas outside the self-adaptive control screen pipe is higher than that of the liquid or gas inside the self-adaptive control screen pipe, the pressure outside the outer cylinder 3 pushes the annular valve 5 to move upwards in the isolated annular 9 through a second gap or hole 8 on the outer cylinder 3 so as to push the annular valve to an upper limiting step 11 at the end part of the isolated annular 9, liquid flow or air flow outside the self-adaptive control screen pipe firstly enters a liquid passing annular space 10 between the outer cylinder 3 and the core pipe 1 through the second gap or hole 8 on the lower part of the outer cylinder 3 and then enters an inner wall inner cavity of the core pipe 1 through a first gap or hole 4 on the upper part of the core pipe 1, so that the communication inside a tool outside the tool is realized, and the function.
Referring to the attached drawings 3-4, the utility model discloses when being applied to bore hole horizontal well fracturing/packing sand control integration technology, bore hole horizontal well fracturing/packing sand control integration technology tubular column includes sleeve pipe a1, direction plug a2, the 1 st section can be closed the door and reform transform sliding sleeve a3, the 1 st section self-adaptation control screen pipe a4, the 1 st section bore hole packer a5, the 2 nd section can be closed the door and reform transform sliding sleeve a6, the 2 nd section self-adaptation control screen pipe a7, the 2 nd section bore hole packer a8, the N th section can be closed the door and reform transform sliding sleeve a9, the N th section self-adaptation control screen pipe a10, the N th section bore hole packer a11, lower part oil pipe a12, hang packer a13, upper part oil.
When in use, the method comprises the following steps:
(1) entering: the segmented modified pipe column is lowered into a shaft according to the figure 3, and a packer is hung in a casing;
(2) setting: pressing and setting all levels of open hole packers, continuously pressurizing until the suspended packer is completely set and then releasing pressure;
(3) and (3) segmented transformation: a steel ball is thrown to the 1 st section of the door-closing transformation sliding sleeve, the circulation channel of each level of self-adaptive control sieve tube is closed under the hydraulic action, the inner cylinder of the door-closing transformation sliding sleeve is pushed hydraulically, the 1 st section of the transformation sliding sleeve is opened, and the 1 st section of the transformation sliding sleeve is transformed by adding sand according to the design, so that the 1 st section of transformation is completed; then, a second steel ball is thrown, the flow channel of the adaptive control sieve tube above the 2 nd section is closed under the hydraulic action, the inner cylinder of the door-closing transformation sliding sleeve is pushed hydraulically, the 2 nd section door-closing transformation sliding sleeve is opened, the 2 nd section is transformed by adding sand according to the design, and the 2 nd section transformation is completed; returning up section by section, and finishing the reconstruction of each section in sequence;
(4) closing the door: continuously opening the oil pipe gate, pushing each section of steel ball to flow back by the formation pressure, and pushing each stage of door closing mechanism of the door closing transformation sliding sleeve by the steel ball to open;
(5) production: the production string is shown in figure 4. And (3) opening a flow passage for production under the action of stratum hydraulic pressure of each section of self-adaptive control sieve tube.
The utility model is characterized in that: firstly, fracturing sliding sleeve or filling instrument provide fracturing, add sand and reform transform the passageway, and the screen pipe provides the production passageway. The pipe column has a sand blocking function while realizing multilayer section separate layer fracturing reconstruction or filling sand prevention, and can effectively prevent fracturing sand and stratum framework sand from entering a shaft, thereby ensuring long-term production of oil and gas wells.
Secondly, the sand control of filling of more intervals or even infinite intervals can be realized, the sand control effect of filling is better, and the construction process is simpler and safer.
It should be noted that: the 1 st section of the door-closing transformation sliding sleeve a3, the 1 st section of the open hole packer a5, the 2 nd section of the door-closing transformation sliding sleeve a6, the 2 nd section of the open hole packer a8, the Nth section of the door-closing transformation sliding sleeve a9 and the Nth section of the open hole packer a11 adopt the existing conventional equipment sold in the market, and the structure is not described in detail herein.
The utility model provides a self-adaptation control screen pipe under different conditions, has effectively fused the performance advantage of oil pipe with the screen pipe, has realized the oil pipe performance that can bear interior pressure, can follow the screen pipe performance of outside-in seepage flow again, has satisfied the needs of oil gas well reservoir transformation and long-term production.
the annular valve 5 adopts an annular sliding sleeve, the inner wall and the outer wall of the annular sliding sleeve are respectively matched with the outer wall of the core pipe 1 and the inner wall of the outer barrel 3 through mechanical seals, and the functions can be realized through a mechanical seal structure.
the method is characterized in that a concentric double-pipe structure of a core pipe 1 and an outer cylinder 3 is adopted, an annulus valve 5 is arranged between annuluses of the core pipe 1 and the outer cylinder 3, the core pipe 1 and the outer cylinder 3 are divided into an upper section and a lower section respectively, a first gap or hole 4 is arranged on the lower section pipe wall of the core pipe 1, the upper section pipe wall of the core pipe 1 is used as a sealing section, the lower section pipe wall of the outer cylinder 3 is used as a sealing section, a second gap or hole 8 is arranged on the upper section pipe wall, so that a staggered structure is formed, and a lower limiting support 13 is arranged at the lower ends; the outer wall of the core tube 1 is provided with a limiting step 12; when the pressure in the core pipe 1 is higher than the external pressure of the outer barrel 3, the pressure in the core pipe 1 is transmitted between the core pipe and the outer barrel 3 through a first gap or hole of the core pipe 1, the annular valve 5 is pushed to move to the position of the limiting step 12, and the sealing surface of the core pipe sealing section, the annular valve and the outer barrel are combined together to form an internal pressure-bearing sealing system; when the external pressure of the outer barrel 3 is greater than the internal pressure of the core pipe 1, the external pressure is transmitted between the core pipe 1 and the outer barrel 3 through the second gap or hole of the outer barrel 3, the annular valve 5 is pushed to be away from the lower limiting support 13 of the limiting step 12, the second gap or hole of the outer barrel, the first gap or hole of the core pipe and the annular of the core pipe and the outer barrel are combined together to form a circulation channel, external fluid enters the inside of the core pipe 1, and the second gap or hole blocks sand or large solid sieve pipe functions.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.
Claims (6)
1. An adaptive control screen pipe, characterized by: the method is characterized in that a concentric double-tube structure of a core tube (1) and an outer tube (3) is adopted, an annular valve (5) is arranged between the annular space of the core tube (1) and the outer tube (3), the core tube (1) and the outer tube (3) are divided into an upper section and a lower section respectively, a first gap or hole (4) is arranged on the tube wall of one section, a sealing section is arranged on the other section, the sealing sections of the core tube (1) and the outer tube (3) are arranged in a staggered mode in different sides, and a limiting step (12) is arranged on the outer wall of the core tube; when the pressure in the core pipe (1) is greater than the external pressure of the outer barrel (3), the pressure in the core pipe (1) is transmitted between the core pipe and the outer barrel (3) through a first gap or hole of the core pipe (1), the annular valve (5) is pushed to move to the position of the limiting step (12), the core pipe sealing section, the annular valve and the outer barrel sealing surface are combined together to form an internal pressure-bearing sealing system, and at the moment, the internal pressure bearing and internal pressure of the oil pipe can be transmitted up and down; when the external pressure of the outer barrel (3) is greater than the internal pressure of the core pipe (1), the external pressure is transmitted between the core pipe (1) and the outer barrel (3) through a second gap or hole of the outer barrel (3), the annular valve (5) is pushed to be far away from the position of the limiting step (12), the second gap or hole of the outer barrel, the first gap or hole of the core pipe and the annular of the core pipe and the outer barrel are combined together to form a circulation channel, external fluid enters the inside of the core pipe (1), and the second gap or hole blocks sand with large particle size or a sieve pipe function of large solid.
2. The adaptive control screen of claim 1, wherein: the core tube (1) and the outer tube (3) are divided into an upper section and a lower section respectively, a first gap or hole (4) is formed in the upper section of the tube wall of the core tube (1), a lower section of the tube wall of the core tube (1) is used as a sealing section, an upper section of the tube wall of the outer tube (3) is used as a sealing section, a second gap or hole (8) is formed in the lower section of the tube wall, therefore, a staggered structure is formed, and a limiting step (12) is arranged on the outer wall of the core tube (1).
3. The adaptive control screen of claim 1, wherein: the core tube (1) and the outer tube (3) are divided into an upper section and a lower section respectively, a first gap or hole (4) is formed in the lower section of the tube wall of the core tube (1), the upper section of the tube wall of the core tube (1) is a sealing section, the lower section of the tube wall of the outer tube (3) is a sealing section, and a second gap or hole (8) is formed in the upper section of the tube wall, so that a staggered structure is formed, and a lower limiting support (13) is arranged at the lower ends of the core tube (1) and the outer tube (3); the outer wall of the core pipe (1) is provided with a limiting step (12).
4. The adaptive control screen of claim 1, wherein: the annulus between the core tube (1) and the outer cylinder (3) is divided into an isolated annulus (9) and a liquid passing annulus (10) through an annulus valve (5).
5. The adaptive control screen of claim 1, wherein: the annular valve (5) adopts an annular piston, the inner wall and the outer wall of the annular piston are respectively provided with a second sealing ring (6) and a third sealing ring (7), the annular piston is sealed with the outer wall of the core pipe (1) through the second sealing ring (6), and the annular piston is sealed with the inner wall of the outer barrel (3) through the third sealing ring (7).
6. The adaptive control screen of claim 1, wherein: the annular valve (5) adopts an annular sliding sleeve, and the inner wall and the outer wall of the annular sliding sleeve are respectively matched with the outer wall of the core pipe (1) and the inner wall of the outer barrel (3) through mechanical sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920486387.4U CN209959218U (en) | 2019-04-11 | 2019-04-11 | Adaptive control screen pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920486387.4U CN209959218U (en) | 2019-04-11 | 2019-04-11 | Adaptive control screen pipe |
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| CN209959218U true CN209959218U (en) | 2020-01-17 |
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| CN201920486387.4U Active CN209959218U (en) | 2019-04-11 | 2019-04-11 | Adaptive control screen pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931037A (en) * | 2019-04-11 | 2019-06-25 | 王淑华 | Self adaptive control screen casing and method |
| CN113356795A (en) * | 2021-07-20 | 2021-09-07 | 中海石油(中国)有限公司 | Fracturing sand prevention production sliding sleeve and application thereof |
-
2019
- 2019-04-11 CN CN201920486387.4U patent/CN209959218U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931037A (en) * | 2019-04-11 | 2019-06-25 | 王淑华 | Self adaptive control screen casing and method |
| CN109931037B (en) * | 2019-04-11 | 2023-12-15 | 王淑华 | Self-adaptive control screen pipe and method |
| CN113356795A (en) * | 2021-07-20 | 2021-09-07 | 中海石油(中国)有限公司 | Fracturing sand prevention production sliding sleeve and application thereof |
| CN113356795B (en) * | 2021-07-20 | 2022-12-02 | 中海石油(中国)有限公司 | Fracturing sand prevention production sliding sleeve and application thereof |
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