Layered water injection and layered oil production tubular column for horizontal well

Abstract

The separated layer water injection and separated layer oil extraction pipe column comprises an oil extraction pipe body, the bottom of the oil extraction pipe body is horizontally arranged, and a first water distributor, a second water distributor and a third water distributor are sequentially arranged on the horizontal part of the oil extraction pipe body from left to right; a hydraulic anchor and a packer are arranged between the first water distributor and the second water distributor; a packer is arranged between the second water distributor and the third water distributor; the tail end of the oil extraction pipe body is connected with a screening assembly, and the screening assembly is communicated with an inner cavity of the oil extraction pipe body. The screening assembly is used for filtering crude oil entering the oil extraction pipe body. The screening assembly is installed at the tail end of the oil extraction pipe column, crude oil entering an oil pipe can be rapidly and effectively filtered through the screening assembly, and it is avoided that the crude oil entering the oil pipe contains large-particle impurities; meanwhile, the hydraulic anchor is arranged on the oil extraction pipe column, and it can be guaranteed that the oil extraction pipe column is stably anchored to the inner side of an oil well through the hydraulic anchor.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil extraction technical field, concretely to a horizontal well separate layer water injection and separate layer oil production pipe column. BACKGROUND

[0002] Horizontal well technology has been widely applied in the process of oil exploitation, and due to the special well structure and reservoir heterogeneity of horizontal well, the water injection and oil production of horizontal well face many challenges. The application effect of the conventional water injection and oil production pipe column in the horizontal well is often unsatisfactory, for example, for the horizontal well of multiple layers, the conventional pipe column is difficult to realize accurate separate layer water injection, which leads to uneven water injection of each layer and affects the overall development effect of the oil reservoir. Uneven water injection may also lead to excessive water injection in some layers and insufficient water injection in other layers, thereby causing water flooding, water channeling and other problems and reducing the oil recovery rate.

[0003] In the prior art, the patent number CN201920077571.3 discloses a horizontal well intelligent separate layer water injection and separate layer oil production pipe column, which comprises a pipe column and a tubing sleeved in the pipe column, an annular water injection gap is formed between the pipe column and the tubing, an oil pump, a switch for controlling the on-off of the tubing and a bottom valve are fixed in the tubing in sequence from inside to outside, the bottom valve is screwedly connected to the lowermost end of the tubing, a plurality of packers and intelligent switchers matched with each packer are further arranged on the tubing between the switch and the bottom valve, and the switch is electrically connected with a ground controller on the ground. One pipe column realizes segmented water injection and segmented oil production, the cable controls the switch to be opened or closed, the intelligent conversion of separate layer water injection and separate layer oil production is realized, the horizontal well throughput multi-segment separate injection is met, and it is of great significance for the development of ultra-low permeability and tight oil.

[0004] The separate layer water injection and separate layer oil production pipe column provided by the above patent can realize relatively uniform water injection effect, but the end of the oil production pipe column does not have a screening mechanism, and under the strong suction force of the oil pump, a large amount of impurity particles are easily sucked into the oil production pipe column, thereby affecting the quality of oil production. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a horizontal well separate layer water injection and separate layer oil production pipe column, and aims at improving the problem that the end of the existing oil production pipe column does not have a screening mechanism, and a large amount of impurity particles are easily sucked into the oil production pipe column under the strong suction force of the oil pump, thereby affecting the quality of oil production.

[0006] The utility model is realized as follows:

[0007] A horizontal well layering water injection and layering oil production pipe column, including the oil production pipe body, the bottom of the oil production pipe body is horizontally arranged, and the horizontal part of the oil production pipe body is sequentially provided with a first water distributor, a second water distributor and a third water distributor from left to right; a hydraulic anchor and a packer are arranged between the first water distributor and the second water distributor; a packer is arranged between the second water distributor and the third water distributor; a screening assembly is connected to the tail end of the oil production pipe body, and the screening assembly is communicated with the inner cavity of the oil production pipe body; the screening assembly is used for filtering the crude oil entering the inner part of the oil production pipe body.

[0008] Preferably, the screening assembly comprises a screening cylinder, a plug and a rotating brush, the plug is installed at the bottom of the screening cylinder and is used for plugging the opening at the bottom end of the screening cylinder; a rotating brush is sleeved outside the screening cylinder, and the rotating brush is used for cleaning the outer side surface of the screening cylinder.

[0009] Preferably, the opening at the bottom end of the screening cylinder is a threaded hole, and an adapter is arranged at the top end of the screening cylinder, and the adapter is used for being connected with the oil production pipe body in a threaded mode.

[0010] Preferably, the top and bottom of the screening cylinder are both provided with a connecting cylinder, and a rotating groove is arranged on the side surface of the connecting cylinder.

[0011] Preferably, the top of the plug is provided with a threaded connecting plate, and the threaded connecting plate is connected with the threaded hole.

[0012] Preferably, a plurality of rotating brushes are arranged, one side of the plurality of rotating brushes facing the screening cylinder is provided with a brush, and the top end and the bottom end of the plurality of rotating brushes are both provided with a rotating ring, and the inner side surface of the rotating ring is aligned with the position of the rotating groove and is provided with a ball.

[0013] Compared with the prior art, the horizontal well layering water injection and layering oil production pipe column has the following beneficial effects:

[0014] 1. The tail end of the oil production pipe column is provided with the screening assembly, the crude oil entering the oil pipe can be quickly and effectively filtered by the screening assembly, so that the crude oil entering the oil pipe is prevented from containing large-particle impurities; meanwhile, the oil production pipe column is provided with the hydraulic anchor, the oil production pipe column can be stably anchored in the inner side of the oil well by the hydraulic anchor, and the stable use of the oil production pipe column is ensured.

[0015] 2. The plug is arranged at the bottom of the screening cylinder, the plug can be flexibly disassembled according to the use requirement, and the opening at the bottom of the screening head can be opened when the screening is not needed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the whole utility model;

[0017] Figure 2 is a structural schematic view of the screening assembly of the utility model.

[0018] Figure 3 is the structural schematic view of the screening cylinder of the utility model;

[0019] Figure 4 is the structural schematic view of the plug of the utility model;

[0020] Figure 5 is the structural schematic view of the rotating brush of the utility model.

[0021] In the figure: 1, oil production pipe body;2, first water distributor;3, hydraulic anchor;4, packer;5, second water distributor;6, third water distributor;7, screening assembly;71, screening cylinder;711, threaded hole;712, connecting cylinder;713, rotating groove;714, adapter;72, plug;721, threaded connection plate;73, rotating brush;731, brush hair;732, rotating ring;733, ball. DETAILED DESCRIPTION

[0022] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connect, can be two elements inside the communication or two element's mutual action relationship.For the ordinary skilled in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0023] The following is further illustrated in conjunction with the drawings and specific embodiments:

[0024] Example 1

[0025] As Figure 1As shown, a horizontal well layering water injection and layering oil production pipe column, including oil production pipe body 1, the bottom of the oil production pipe body 1 is horizontally arranged, which is convenient for the oil production pipe body 1 to collect crude oil in the horizontal well. And the horizontal part of the oil production pipe body 1 is provided with a first water distributor 2, a second water distributor 5 and a third water distributor 6 from left to right; the first water distributor 2, the second water distributor 5 and the third water distributor 6 are mainly convenient for layering water injection in the oil well, which can distribute the water injection from the ground to different water injection layers according to the predetermined scheme and flow. By controlling the water injection amount of each layer, the formation energy can be effectively supplemented, the formation pressure can be maintained, the crude oil can be displaced to flow to the oil well, and the oil recovery efficiency can be improved; the first water distributor 2 and the second water distributor 5 are provided with a hydraulic anchor 3 and a packer 4; the hydraulic anchor 3 usually relies on the pressure of the liquid in the well to push the anchor jaw to extend and bite the inner wall of the casing, so as to fix the tubing string at a predetermined position in the well, and ensure that the downhole tool can work normally; the second water distributor 5 and the third water distributor 6 are provided with a packer 4; the packer 4 is used to separate the layers in the oil well, which ensures the layering water injection in the oil well. The tail end of the oil production pipe body 1 is connected with a screening assembly 7, and the screening assembly 7 communicates with the inner cavity of the oil production pipe body 1; the screening assembly 7 is used for filtering the crude oil entering the inside of the oil production pipe body 1.

[0026] Working principle: use is to install the oil production pipe body 1 with various components to the designated position in the oil production well, and connect the top end of the oil production pipe body 1 with the oil production pump, and the suction force of the oil production pump can suck the crude oil into the oil production pipe, and the large particle impurities in the crude oil will be filtered out by the screening assembly 7 when the crude oil enters the oil production pipe body 1 through the screening assembly 7, so as to avoid too many impurities in the crude oil, thereby avoiding the problem of subsequent processing of the crude oil. Compared with the prior art, the tail end of the oil production pipe column of the present application is provided with a screening assembly 7, which can quickly and effectively filter the crude oil entering the oil pipe, and avoid that the crude oil entering the oil pipe contains large particle impurities; at the same time, the oil production pipe column is provided with a hydraulic anchor 3, which can ensure that the oil production pipe column is anchored stably on the inner side of the oil well, and ensures the stable use of the oil production pipe column.

[0027] Example 2

[0028] As Figure 1As shown, a horizontal well layering water injection and layering oil production pipe column, including the oil production pipe body 1, the bottom of the oil production pipe body 1 is horizontally arranged, which is convenient for the oil production pipe body 1 to collect crude oil in the horizontal well. And the horizontal part of the oil production pipe body 1 is sequentially provided with the first water distributor 2, the second water distributor 5 and the third water distributor 6 from left to right; the first water distributor 2, the second water distributor 5 and the third water distributor 6 are mainly convenient for layering water injection in the oil well, which can distribute the water injection from the ground to different water injection layer sections according to the predetermined scheme and flow. By controlling the water injection amount of each layer section, the formation energy can be effectively supplemented, the formation pressure can be maintained, the crude oil can be displaced to flow to the oil well, and the oil recovery efficiency can be improved; the hydraulic anchor 3 and the packer 4 are arranged between the first water distributor 2 and the second water distributor 5; the hydraulic anchor 3 usually relies on the pressure of the liquid in the well to push the anchor jaw to extend and bite the inner wall of the casing, thereby fixing the tubing string at a predetermined position in the well, ensuring that the downhole tool can work normally; the packer 4 is arranged between the second water distributor 5 and the third water distributor 6; the packer 4 is used to separate the layers in the oil well, ensuring that the layers in the oil well are water injected. The oil production pipe body 1 is connected with the screening assembly 7, and the screening assembly 7 is communicated with the inner cavity of the oil production pipe body 1; the screening assembly 7 is used for filtering the crude oil entering the inside of the oil production pipe body 1.

[0029] As shown in Figure 2 , the screening assembly 7 includes a screening cylinder 71, a plug 72 and a rotating brush 73, the plug 72 is installed at the bottom of the screening cylinder 71, and is used to block the opening at the bottom end of the screening cylinder 71; at the same time, the position of the plug 72 is also convenient for replacing the drill bit. The rotating brush 73 is sleeved outside the screening cylinder 71, and is used for cleaning the outer side surface of the screening cylinder 71; the screening cylinder 71 is convenient for screening the crude oil entering the inside of the oil production pipe.

[0030] As shown in Figure 3 , the opening at the bottom end of the screening cylinder 71 is a threaded hole 711, which is convenient for the threaded connection of the screening cylinder 71 and the plug 72. And the top end of the screening cylinder 71 is provided with an adapter 714, which is used for threaded connection with the oil production pipe body 1. The top and bottom of the screening cylinder 71 are provided with a connecting cylinder 712, and the side surface of the connecting cylinder 712 is provided with a rotating groove 713; the cooperation of the connecting cylinder 712 and the rotating groove is convenient for the rotating connection of the screening cylinder 71 and the rotating brush 73, which greatly facilitates the rotation and use of the rotating brush 73.

[0031] As shown in Figure 4 , the top of the plug 72 is provided with a threaded connection plate 721, which is connected with the threaded hole 711; which is convenient for the plug 72 to be selectively disassembled and used according to the use requirement.

[0032] As shown in Figure 5As shown, the rotating brush 73 is provided with a plurality of brush hairs 731 on the side facing the screening cylinder 71, and the rotating brush 73 cooperates with the brush hairs 731 to facilitate brushing the surface of the screening cylinder 71, thereby facilitating cleaning the surface of the rotating brush 73. The top and bottom ends of the plurality of rotating brushes 73 are provided with rotating rings 732, and the inner side of the rotating ring 732 is provided with a ball 733 at the position aligned with the rotating groove 713; the cooperation of the rotating ring 732 and the ball 733 facilitates flexible rotation of the rotating brush 73, and facilitates smooth cleaning of the surface of the screening cylinder 71 through rotation of the rotating brush 73.

[0033] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A horizontal well separate layer water injection and separate layer oil production pipe column, comprising an oil production pipe body (1), characterized in that, The oil production pipe body (1) is horizontally arranged at the bottom, and the horizontal part of the oil production pipe body (1) is sequentially provided with a first water distributor (2), a second water distributor (5) and a third water distributor (6) from left to right; a hydraulic anchor (3) and a packer (4) are arranged between the first water distributor (2) and the second water distributor (5); a packer (4) is arranged between the second water distributor (5) and the third water distributor (6); a screening assembly (7) is connected to the tail end of the oil production pipe body (1), the screening assembly (7) is communicated with the inner cavity of the oil production pipe body (1); the screening assembly (7) is used for filtering the crude oil entering the inside of the oil production pipe body (1).

2. The horizontal well separate layer water injection and separate layer oil production pipe column according to claim 1, characterized in that, The screening assembly (7) comprises a screening cylinder (71), a plug (72) and a rotating brush (73), the plug (72) is installed at the bottom of the screening cylinder (71) and is used for plugging the opening at the bottom end of the screening cylinder (71); the rotating brush (73) is sleeved outside the screening cylinder (71) and is used for cleaning the outer side surface of the screening cylinder (71).

3. The horizontal well separate layer water injection and separate layer oil production pipe column according to claim 2, characterized in that, The opening at the bottom end of the screening cylinder (71) is a threaded hole (711), and an adapter (714) is arranged at the top end of the screening cylinder (71), the adapter (714) is used for being connected with the oil production pipe body (1) in a threaded manner.

4. The horizontal well separate layer water injection and separate layer oil production pipe column according to claim 2, characterized in that, The top and bottom of the screening cylinder (71) are provided with a connecting cylinder (712), and the side surface of the connecting cylinder (712) is provided with a rotating groove (713).

5. The horizontal well separate layer water injection and separate layer oil production pipe column according to claim 3, characterized in that, The top of the plug (72) is provided with a threaded connecting plate (721), and the threaded connecting plate (721) is connected with the threaded hole (711).

6. The horizontal well separate layer water injection and separate layer oil production pipe column according to claim 2, characterized in that, A plurality of rotating brushes (73) are arranged, one side of the plurality of rotating brushes (73) facing the screening cylinder (71) is provided with a brush (731), and the top end and the bottom end of the plurality of rotating brushes (73) are provided with rotating rings (732), and the inner side of the rotating rings (732) is aligned with the positions of the rotating grooves (713) and is provided with rolling balls (733).

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