Advantageous channel directional plugging device and method

Abstract

The application discloses an advantage channel directional plugging device and method, and belongs to the technical field of well drilling. The directional plugging device comprises a shell, a pulse excitation chamber, a self-adapting throttle valve and an elastic component; the pulse excitation chamber, the self-adapting throttle valve and the elastic component are sequentially arranged in the shell along a fluid entering direction; one end of the pulse excitation chamber, from which fluid flows out, is arranged in the self-adapting throttle valve, and the self-adapting throttle valve is slidably connected with the pulse excitation chamber and the shell; and the elastic component is sleeved at a lower end of the self-adapting throttle valve. The advantage channel directional plugging device adopts the pulse excitation chamber, the self-adapting throttle valve and the elastic component, can realize plugging of a well wall while drilling, does not need to additionally drill a plugging channel, shortens the whole well wall repairing time, is simple in steps, greatly improves the efficiency, and reduces the repairing cost.

Description

Technical Field

[0001] This invention belongs to the field of deep well plugging devices, and specifically relates to a directional plugging device and method for advantageous channels. Background Technology

[0002] During drilling operations, as the drilling depth increases, the drill pipe will collide with the well wall, causing damage. This damage can lead to soil fragments clogging the wellbore, and if not repaired promptly, it can cause a collapse. Currently, the common method for sealing leaks involves drilling a hole at the location of the leak and then using a pipeline to deliver sealing material to the site.

[0003] However, the equipment used in the above-mentioned sealing methods is limited in function and requires separate drilling for sealing. It is impossible to seal the well wall that needs to be repaired while drilling, resulting in a long repair time, complicated steps, low efficiency, and high repair costs. Summary of the Invention

[0004] To address the above problems, this invention proposes a directional blocking device and method for advantageous channels.

[0005] The objective of this invention can be achieved through the following methods:

[0006] This invention provides a superior channel directional blocking device, comprising a housing, a pulse excitation chamber, an adaptive throttling valve, and an elastic component;

[0007] The pulse excitation chamber, the adaptive throttle valve, and the elastic component are sequentially arranged inside the housing along the fluid inlet direction;

[0008] One end of the pulse excitation chamber from which the fluid flows out is located inside an adaptive throttle valve, which is slidably connected to the pulse excitation chamber and the housing.

[0009] The elastic component is fitted onto the lower end of the adaptive throttle valve.

[0010] Furthermore, a jet hole penetrating the inner and outer walls is provided in the middle of the housing.

[0011] Furthermore, the pulse excitation chamber includes a variable diameter flow channel, a transverse and longitudinal wave excitation chamber, and a flow channel arranged sequentially along the fluid inlet direction.

[0012] Furthermore, a wing-type exciter is provided inside the transverse and longitudinal wave excitation chamber.

[0013] Furthermore, the flow channel includes a transverse flow channel and an axial flow channel.

[0014] Furthermore, the pulse excitation chamber also includes a transverse annulus and a transverse jet hole. The transverse annulus is disposed between the inner and outer walls of the pulse excitation chamber, with one side communicating with the transverse flow channel and the other side communicating with the transverse jet hole.

[0015] Furthermore, the adaptive throttle valve includes a continuously variable diameter main channel, and the adaptive throttle valve is provided with a throttle hole that penetrates the inner and outer walls. When the well wall is blocked, the throttle hole connects the transverse jet hole and the jet hole.

[0016] Furthermore, both ends of the housing are provided with connecting threads.

[0017] Furthermore, the elastic component includes a disc spring.

[0018] This invention also provides a method for directional blocking of advantageous channels, comprising the following steps:

[0019] The fluid in the chamber is made to adhere to the walls by pulse excitation, thus forming an axial pulse;

[0020] An axial pulse enters the adaptive throttle valve, creating pressure along the fluid inflow direction. The adaptive throttle valve moves along the fluid inflow direction, compressing the elastic component.

[0021] After the elastic component is compressed, the adaptive throttle valve opens, allowing the sealing material in the fluid to seal the well wall.

[0022] The pulse excitation chamber, the adaptive throttle valve, and the elastic component are sequentially arranged inside the housing along the fluid inlet direction;

[0023] The adaptive throttle valve is disposed between the pulse excitation chamber and the housing, and the adaptive throttle valve is slidably connected to the pulse excitation chamber and the housing;

[0024] The elastic component is fitted onto the lower end of the adaptive throttle valve.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] The aforementioned advantageous directional plugging device employs a pulse excitation chamber, an adaptive throttle valve, and elastic components. Utilizing the wall-attachment effect of the transverse and longitudinal wave excitation chambers, the elastic components can be compressed, allowing the fluid containing the plugging material to pass through the transverse jet orifice, throttle orifice, and jet orifice into the wellbore wall, achieving directional plugging. This allows for plugging of the wellbore wall simultaneously with drilling, eliminating the need for drilling additional plugging channels. This shortens the overall wellbore repair time, simplifies the process, significantly improves efficiency, and reduces repair costs.

[0027] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 An explosion diagram of the advantageous channel directional blocking device according to an embodiment of the present invention is shown;

[0030] Figure 2 A schematic diagram of the assembly of the advantageous channel directional blocking device according to an embodiment of the present invention is shown;

[0031] Figure 3(a) shows a schematic diagram of the adaptive throttle valve closing according to an embodiment of the present invention;

[0032] Figure 3(b) shows a schematic diagram of the adaptive throttle valve opening according to an embodiment of the present invention;

[0033] Figure 4 A cross-sectional view AA of the adaptive throttle valve in the open state according to an embodiment of the present invention is shown.

[0034] In the figure, 1-shell, 11-jet orifice, 2-pulse excitation chamber, 21-variable diameter flow channel, 22-transverse and longitudinal wave excitation chamber, 23-side wing exciter, 24-transverse flow channel, 25-axial flow channel, 26-transverse annulus, 27-transverse jet orifice, 3-adaptive throttle valve, 31-throttle orifice, 32-continuously variable diameter main flow channel, 4-elastic component. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1 and 2As shown, this invention relates to a dominant channel directional blocking device, comprising a housing 1, a pulse excitation chamber 2, an adaptive throttle valve 3, and an elastic component 4; the pulse excitation chamber 2, the adaptive throttle valve 3, and the elastic component 4 are sequentially arranged within the housing 1 along the fluid inlet direction; one end of the pulse excitation chamber 2 from which the fluid flows out is disposed within the adaptive throttle valve 3, and the adaptive throttle valve 3 is slidably connected to the pulse excitation chamber 2 and the housing 1; the elastic component 4 is sleeved on the lower end of the adaptive throttle valve 3.

[0037] The housing 1 is cylindrical in shape, hollow inside with a stepped internal structure. The upper part of the housing 1 is an upper stepped cylinder with a raised edge at its top. The upper stepped cylinder is designed to accommodate the pulse excitation chamber 2. The raised edge of the housing 1 limits the upper end of the pulse excitation chamber 2, preventing it from sliding out of the housing 1. The middle section of the housing 1 is a lower stepped cylinder, designed to accommodate the adaptive throttle valve 3. The height of the step is equal to the sidewall thickness of the adaptive throttle valve 3, but the adaptive throttle valve 3 is spaced a certain distance from the step, allowing it to fit snugly against the pulse excitation chamber 2 and move within the housing 1. A main channel is opened at the middle of the closed lower part of the housing 1. The main channel is a continuously variable, hollow pipe that is higher than the closed platform at the lower end of the housing 1. An annular space is formed along the main channel within the closed platform, allowing the lower end of the adaptive throttle valve 3 to be inserted into the annular space.

[0038] The adaptive throttle valve 3 is a stepped cylinder with a hollow interior. The lower stepped small cylinder is fitted inside the outer wall of the main flow channel inside the housing 1, and the lower end of the lower stepped small cylinder is inserted into the annular space of the housing 1.

[0039] The elastic component 4 is fitted on the outside of the lower stepped small cylinder of the adaptive throttle valve 3. The closed platform of the housing 1 limits the lower end of the elastic component 4, and the step of the adaptive throttle valve 3 limits the upper end of the elastic component 4.

[0040] The inner wall of the adaptive throttle valve 3 is slidably connected to the pulse excitation chamber 2, and the outer wall of the adaptive throttle valve 3 is slidably connected to the housing 1. The adaptive throttle valve 3 undergoes elastic deformation along with the elastic component 4, allowing it to move up and down between the housing 1 and the pulse excitation chamber 2. During downward movement, the lower stepped small cylinder of the adaptive throttle valve 3 reaches the bottom of the annulus of the housing 1, acting as a limit. During upward movement, the lower end of the upper stepped large cylinder of the adaptive throttle valve 3 contacts the lower end of the pulse excitation chamber 2, forming a limit.

[0041] The housing 1 has a jet hole 11 that penetrates the inner and outer walls in the middle. The purpose of the jet hole 11 is to allow the fluid with added sealing material to be ejected from the jet hole 11. There can be one jet hole 11 or two jet holes 11 that are arranged opposite each other. Usually, two jet holes are arranged as a group, or multiple groups can be arranged.

[0042] The pulse excitation chamber 2 includes a variable diameter flow channel 21, a transverse and longitudinal wave excitation chamber 22, and a flow channel arranged sequentially along the fluid inlet direction.

[0043] The transverse and longitudinal wave excitation chamber 22 is equipped with a side-wing exciter 23.

[0044] The flow channel includes a transverse flow channel 24 and an axial flow channel 25.

[0045] The pulse excitation chamber 2 also includes a transverse annular space 26 and a transverse jet hole 27. One side of the transverse annular space 26 is connected to the transverse flow channel 24, and the other side is connected to the transverse jet hole 27.

[0046] The variable-diameter flow channel 21 is funnel-shaped and hollow inside. The lower end of the funnel-shaped flow channel 21 is connected to the upper end of the transverse and longitudinal wave excitation chamber 22. The transverse and longitudinal wave excitation chamber 22 is gyroscope-shaped and hollow inside. The lower end of the transverse and longitudinal wave excitation chamber 22 is connected to the flow channel. A side-wing exciter 23 is installed inside the transverse and longitudinal wave excitation chamber 22. The side-wing exciter 23 is shaped like an unequal-sided right-angled triangle. The two sides of the right-angled triangle are parallel to the inner wall of the transverse and longitudinal wave excitation chamber 22. The side-wing exciter 23 is composed of a pair of right-angled triangles. The side-wing exciter 23 is installed inside the transverse and longitudinal wave excitation chamber 22, so that the transverse and longitudinal wave excitation chamber 22 forms a hollow pyramid structure inside. The inner wall of the transverse and longitudinal wave excitation chamber 22 and the right-angled edge of the side-wing exciter 23 form an outer ring channel. The edges of each corner of the transverse and longitudinal wave excitation chamber 22 are rounded to facilitate better passage of fluid or pulse.

[0047] The lower end of the transverse and longitudinal wave excitation chamber 22 is provided with a transverse flow channel 24 and an axial flow channel 25 that are connected. The outlet direction of the transverse flow channel 24 is at the side wall of one side of the pulse excitation chamber 2, and the axial flow channel 25 is connected to the upper stepped large cylindrical chamber in the adaptive throttle valve 3.

[0048] like Figure 4 As shown, a transverse annular space 26 is provided inside the pulse excitation chamber 2. The transverse annular space 26 is located between the inner wall and the outer wall of the pulse excitation chamber 2 and can communicate with the transverse flow channel 24. A transverse jet hole 27 is provided on the side wall of the pulse excitation chamber 2. The transverse jet hole 27 can communicate with the transverse flow channel 24 and the transverse annular space.

[0049] There is at least one transverse jet hole 27, preferably a pair arranged opposite each other, both of which are in communication with the transverse annulus 26.

[0050] The adaptive throttle valve 3 includes a continuously variable diameter main channel 32, which comprises a first cylindrical portion and a second cylindrical portion arranged sequentially along the fluid inlet direction. A hollow flow channel is provided within the first and second cylindrical portions, comprising a first cylindrical section, a conical transition section, and a second cylindrical section connected sequentially. A throttle orifice 31 penetrating the inner and outer walls is provided on the adaptive throttle valve 3, located on the first cylindrical portion and communicating with the hollow flow channel. Preferably, a set of throttle orifices 31 are arranged opposite each other.

[0051] The jet hole 11 on the housing 1, the transverse jet hole 27 on the pulse excitation chamber 2, and the throttling hole 31 on the adaptive throttling valve 3 are arranged on the same axis along the length direction of the housing 1.

[0052] Both ends of the housing 1 are provided with connecting threads. One end of the housing 1 is provided with an upper connecting thread and the other end is provided with a lower connecting thread. The upper connecting thread is provided inside the housing 1 to form an internal connecting thread, which can be used to connect with the upper drilling tool such as a drill rod. The lower connecting thread is provided outside the housing 1 to form an external thread, which can be used to connect with drilling tools such as drill bits.

[0053] Its working principle is as follows: during normal drilling, the elastic component 4 supports the adaptive throttle valve 3, causing the adaptive throttle valve 3 to undergo longitudinal displacement. At this time, the throttle orifice 31, the jet orifice 11, and the transverse jet orifice 27 cannot cooperate and connect with each other (e.g., Figure 3a As shown), the transverse jet function is not activated; the fluid enters the transverse and longitudinal wave excitation chamber 22 through the variable diameter flow channel 21. Due to the wall adhesion effect of the side wing exciter 23, the fluid generates eddies and axial and transverse pulses in the transverse and longitudinal wave excitation chamber 22. Since the transverse jet function is not activated at this time, the fluid retains the axial pulse and enters the adaptive throttle valve 3 through the axial flow channel 25, generating pressure on it, compressing the elastic component 4, causing the adaptive throttle valve 3 to undergo axial displacement, and then enters the main flow channel through the continuous variable diameter main flow channel 32. The fluid enters the drill bit and other drilling tools in the form of pulses.

[0054] When drilling reaches the formation with the dominant permeability channel, temporary plugging material is added to the fluid and the surface pump pressure is increased. At this point, the fluid pressure increases, and the flowing pressure acts on the adaptive throttle valve 3. The adaptive throttle valve 3 is pressurized and undergoes axial displacement, connecting the throttle orifice 31, the jet orifice 11, and the transverse jet orifice 27 (e.g., Figure 3bAs shown, when the transverse jet function is activated, part of the fluid in the transverse and longitudinal wave excitation chamber 22 passes through the axial flow channel 25 and then enters the main flow channel through the continuously variable diameter main flow channel 32. The fluid enters the drill bit and other drilling tools in the form of pulses. Another part of the fluid enters the transverse annulus 26 through the transverse flow channel 24 in the form of transverse pulses, and the temporary plugging material in the fluid is stored in the transverse annulus 26. The transverse annulus 26 is connected to the transverse jet hole 27. Since the transverse jet hole 27, the throttling hole 31 and the jet hole 11 are connected to each other at this time, transverse pulse jet can be performed, and under the action of pulse pressure, it can quickly enter the formation of the dominant permeability channel for temporary plugging.

[0055] The elastic component 4 includes a disc spring, whose main function is to provide compression and rebound.

[0056] This invention also relates to a method for directional sealing of a superior channel, wherein the fluid is subjected to a wall-attaching effect by a pulse excitation chamber 2, forming an axial pulse; the axial pulse enters the adaptive throttle valve 3 and forms pressure along the fluid inflow direction, the adaptive throttle valve 3 moves along the fluid inflow direction to compress the elastic component 4; after the elastic component 4 is compressed, the adaptive throttle valve 3 is in an open state, allowing the sealing material in the fluid to seal the well wall; the pulse excitation chamber 2, the adaptive throttle valve 3, and the elastic component 4 are sequentially arranged in the housing 1 along the fluid inflow direction; the adaptive throttle valve 3 is arranged between the pulse excitation chamber 2 and the housing 1, and the adaptive throttle valve 3 is slidably connected to the pulse excitation chamber 2 and the housing 1; the elastic component 4 is sleeved on the lower end of the adaptive throttle valve 3.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A directional blocking device for advantageous channels, characterized in that: It includes a housing (1), a pulse excitation chamber (2), an adaptive throttle valve (3), and an elastic component (4); The pulse excitation chamber (2), the adaptive throttle valve (3), and the elastic component (4) are sequentially arranged inside the housing (1) along the fluid inlet direction; One end of the pulse excitation chamber (2) from which the fluid flows out is located inside the adaptive throttle valve (3), and the adaptive throttle valve (3) is slidably connected to the pulse excitation chamber (2) and the housing (1); The elastic component (4) is sleeved on the lower end of the adaptive throttle valve (3); The pulse excitation chamber (2) includes a variable-diameter flow channel (21), a transverse and longitudinal wave excitation chamber (22), and a flow channel arranged sequentially along the fluid inlet direction. The variable-diameter flow channel (21) is funnel-shaped and hollow inside. The lower end of the funnel-shaped variable-diameter flow channel (21) is connected to the upper end of the transverse and longitudinal wave excitation chamber (22). The transverse and longitudinal wave excitation chamber (22) is gyroscope-shaped and hollow inside. The lower end of the transverse and longitudinal wave excitation chamber (22) is connected to the flow channel. A side-wing exciter (23) is arranged inside the transverse and longitudinal wave excitation chamber (22). The side-wing exciter (23) is an unequal-sided right-angled triangle. The two sides of the right-angled triangle are parallel to the inner wall of the transverse and longitudinal wave excitation chamber (22). The side-wing exciter (23) is composed of a pair of right-angled triangles. The side-wing exciter (23) is arranged inside the transverse and longitudinal wave excitation chamber (22), so that the transverse and longitudinal wave excitation chamber (22) is... 2) The interior forms a hollow pyramid structure. The inner wall of the transverse and longitudinal wave excitation chamber (22) and the right-angle edge of the side-wing exciter (23) form an outer ring channel. The lower end of the transverse and longitudinal wave excitation chamber (22) is provided with a transverse flow channel (24) and an axial flow channel (25). The outlet direction of the transverse flow channel (24) is on the side wall of the pulse excitation chamber (2). The axial flow channel (25) is connected to the upper stepped large cylindrical chamber in the adaptive throttle valve (3). A transverse annulus (26) is provided in the pulse excitation chamber (2). The transverse annulus (26) is located between the inner wall and the outer wall of the pulse excitation chamber (2) and is connected to the transverse flow channel (24). A transverse jet hole (27) is provided on the side wall of the pulse excitation chamber (2). The transverse jet hole (27) is connected to the transverse flow channel (24) and the transverse annulus (26).

2. The dominant channel directional blocking device as described in claim 1, characterized in that: The housing (1) is provided with a jet hole (11) that penetrates the inner and outer walls in the middle.

3. The dominant channel directional blocking device as described in claim 2, characterized in that: The adaptive throttle valve (3) includes a continuously variable diameter main channel (32). The adaptive throttle valve (3) is provided with a throttle hole (31) that penetrates the inner and outer walls. When the well wall is blocked, the throttle hole (31) connects the transverse jet hole (27) and the jet hole (11).

4. The dominant channel directional blocking device as described in claim 2, characterized in that: Both ends of the housing (1) are provided with connecting threads.

5. The dominant channel directional blocking device as described in claim 1, characterized in that: The elastic component (4) includes a disc spring.

6. A method for directional blocking of advantageous channels, characterized in that, Includes the following steps: The fluid in the chamber (2) is made to adhere to the wall by pulse excitation, thus forming an axial pulse; An axial pulse enters the adaptive throttle valve (3) and forms pressure along the fluid inlet direction. The adaptive throttle valve (3) moves along the fluid inlet direction to compress the elastic component (4). After the elastic component (4) is compressed, the adaptive throttle valve (3) is opened, so that the sealing material in the fluid can seal the well wall; The pulse excitation chamber (2), the adaptive throttle valve (3), and the elastic component (4) are sequentially arranged inside the housing (1) along the fluid inlet direction; The adaptive throttle valve (3) is disposed between the pulse excitation chamber (2) and the housing (1), and the adaptive throttle valve (3) is slidably connected to the pulse excitation chamber (2) and the housing (1); The elastic component (4) is sleeved on the lower end of the adaptive throttle valve (3); The pulse excitation chamber (2) includes a variable-diameter flow channel (21), a transverse and longitudinal wave excitation chamber (22), and a flow channel arranged sequentially along the fluid inlet direction. The variable-diameter flow channel (21) is funnel-shaped and hollow inside. The lower end of the funnel-shaped variable-diameter flow channel (21) is connected to the upper end of the transverse and longitudinal wave excitation chamber (22). The transverse and longitudinal wave excitation chamber (22) is gyroscope-shaped and hollow inside. The lower end of the transverse and longitudinal wave excitation chamber (22) is connected to the flow channel. A side-wing exciter (23) is arranged inside the transverse and longitudinal wave excitation chamber (22). The side-wing exciter (23) is an unequal-sided right-angled triangle. The two sides of the right-angled triangle are parallel to the inner wall of the transverse and longitudinal wave excitation chamber (22). The side-wing exciter (23) is composed of a pair of right-angled triangles. The side-wing exciter (23) is arranged inside the transverse and longitudinal wave excitation chamber (22), so that the transverse and longitudinal wave excitation chamber (22) is... 2) The interior forms a hollow pyramid structure. The inner wall of the transverse and longitudinal wave excitation chamber (22) and the right-angle edge of the side-wing exciter (23) form an outer ring channel. The lower end of the transverse and longitudinal wave excitation chamber (22) is provided with a transverse flow channel (24) and an axial flow channel (25). The outlet direction of the transverse flow channel (24) is on the side wall of the pulse excitation chamber (2). The axial flow channel (25) is connected to the upper stepped large cylindrical chamber in the adaptive throttle valve (3). A transverse annulus (26) is provided in the pulse excitation chamber (2). The transverse annulus (26) is located between the inner wall and the outer wall of the pulse excitation chamber (2) and is connected to the transverse flow channel (24). A transverse jet hole (27) is provided on the side wall of the pulse excitation chamber (2). The transverse jet hole (27) is connected to the transverse flow channel (24) and the transverse annulus (26).

Images