Electrically controlled bridge plug apparatus and method of use

Abstract

The application provides an electrically-controlled bridge plug device, which comprises a first joint, an adjusting mechanism, a sleeve arranged on the radial outside, a setting shaft arranged on the radial inside, a connecting sleeve in sealed connection with the sleeve and the setting shaft respectively to divide the sleeve into a first chamber and a second chamber containing fluid, an electrically-controlled mechanism arranged in the first chamber and connected with the second chamber, and a bridge plug arranged downstream of the sleeve, wherein the first chamber can communicate with the second chamber under the action of the electrically-controlled mechanism, and the sleeve is configured to move downstream under the action of pressure difference to facilitate the setting of the bridge plug in the wellbore. The application can realize effective setting of deep wells and ultra-deep wells, and has the advantages of high safety, strong reliability, low operation cost and reusability.

Description

Technical Field

[0001] This invention relates to the field of oilfield downhole tool technology, specifically to an electronically controlled bridge plug device and a method of using it. Background Technology

[0002] Bridge plug perforation combined with other technologies is an important means to increase production and improve recovery rates in tight oil and gas reservoirs. This technology has the advantages of being technically unrestricted and capable of large-scale, high-volume fracturing.

[0003] Currently, conventional bridge plugs are installed in the wellbore using a cable-driven setting tool, which is then ignited and set. However, this method has several drawbacks in practice. First, it carries high safety risks, making it difficult to guarantee the safety of personnel. Furthermore, it is costly, leading to a low tolerance for error. Second, because ignition and setting are required, and explosives are controlled materials, delays in explosive supply often disrupt the construction schedule. Third, in deep and ultra-deep wells, excessive pressure or inadequate tool sealing can cause liquid ingress into the explosive column, resulting in setting failure.

[0004] Therefore, it is desirable in the art to provide an electronically controlled bridge plug device and a method of using it to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to propose an electrically controlled bridge plug device that can effectively set the plug in deep and ultra-deep wells. Instead of using the traditional gunpowder setting method, it adopts a hydraulic lock to achieve bridge plug setting by using the pressure of the downhole fluid column (fluid in the second chamber).

[0006] According to a first aspect of the present invention, an electronically controlled bridge plug device is provided, comprising a first connector,

[0007] An adjusting mechanism located downstream of the first connector includes a sleeve disposed radially outward, a setting shaft disposed radially inward, and a connecting sleeve that is sealed to the sleeve and the setting shaft respectively to divide the sleeve into a first chamber and a second chamber containing fluid. The sleeve is initially stationary relative to the setting shaft.

[0008] An electronic control mechanism disposed within the first chamber and connected to the second chamber, and

[0009] For use as a bridge plug located downstream of the sleeve.

[0010] The first chamber can communicate with the second chamber under the action of the electronic control mechanism, and the sleeve is configured to move downstream under the action of pressure difference to cause the bridge plug to be seated in the wellbore.

[0011] In one embodiment, the electronic control mechanism includes a hydraulic cylinder connected to the second chamber, a piston disposed within the hydraulic cylinder and used to seal the second chamber, and a hydraulic lock disposed upstream of the hydraulic cylinder.

[0012] The piston is configured to move upstream when the hydraulic lock is opened, allowing fluid in the second chamber to flow into the first chamber.

[0013] In one embodiment, the connecting sleeve includes a first connecting sleeve portion and a second connecting sleeve portion extending radially outward from the first connecting sleeve portion and sealingly connected to the sleeve, wherein at least one fluid transmission hole communicating the second chamber with the liquid cylinder is provided along the circumference of the second connecting sleeve portion.

[0014] In one embodiment, a circlip groove extending radially outward and used for fixed connection with the seat shaft is formed on the inner circumferential surface of the first connecting sleeve portion.

[0015] In one embodiment, a second connector configured as a hollow sleeve is provided downstream of the bridge plug, and a plurality of spaced-apart bridge plugs are arranged circumferentially along the second connector.

[0016] In one embodiment, a cone-shaped compression section is provided between the sleeve and the bridge plug.

[0017] The bridge plug has a corresponding shape that can abut against the extrusion part.

[0018] In one embodiment, a ratchet extending radially outward and used for anchoring within the wellbore is formed at the junction of the bridge plug and the extrusion portion.

[0019] In one embodiment, the seat shaft is configured in a cross shape and includes a first connecting portion configured in a columnar form and fixedly connected to the sleeve by a first pin, a second connecting portion extending from a first end of the first connecting portion and sealingly connected to the first connecting sleeve portion, and a third connecting portion extending from a second end of the first connecting portion and fixedly connected to the second connector by a second pin.

[0020] In one embodiment, a sealing ring is provided between the sleeve and the second connecting sleeve portion and the seated shaft.

[0021] According to a second aspect of the present invention, a method for using an electronically controlled bridge plug device as described above is provided, comprising the following steps:

[0022] S1. Place the bridge plug with the assembled electronically controlled bridge plug device into the wellbore;

[0023] S2. Open the hydraulic lock to allow fluid in the second chamber to flow into the first chamber sequentially through the fluid transmission hole and the hydraulic cylinder; the sleeve shears off the first pin under the action of pressure difference and moves downstream to allow the bridge plug to be seated in the wellbore;

[0024] S3. Under the further pressure difference, the setting shaft shears off the second pin and moves upstream, thereby engaging with the snap ring groove to remove the electrically controlled bridge plug device from the wellbore.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] This invention enables effective setting of deep and ultra-deep wells, and abandons the traditional gunpowder setting method, instead employing an electromagnetic hydraulic lock to achieve bridge plug setting by utilizing the pressure of the downhole fluid column (fluid in the second chamber). This method has advantages such as high safety, high reliability, low operating cost, and reusability.

[0027] Furthermore, under the action of the electronic control mechanism, the present invention can keep the first chamber and the second chamber in a non-communicating state, thereby ensuring that there is no relative displacement between the setting shaft and the connecting sleeve through the liquid column (fluid in the second chamber), further ensuring that the bridge plug can always maintain a stable state during the lowering process, thereby avoiding the situation of setting failure due to premature setting.

[0028] In addition, since the first connecting part of the setting shaft is fixedly connected to the sleeve by the first pin, and the third connecting part of the setting shaft is fixedly connected to the second connector by the second pin, the electronically controlled bridge plug device can perform phased operations (setting and releasing) in the wellbore, which further improves the success rate of bridge plug setting. Attached Figure Description

[0029] The invention will now be described in detail with reference to the accompanying drawings, in which:

[0030] Figure 1 The schematic diagram illustrates the structure of the electronically controlled bridge plug device according to the present invention;

[0031] Figure 2 This is a schematic diagram of the first state of the electronically controlled bridge plug device according to the present invention;

[0032] Figure 3 A schematic diagram of the second state of the electronically controlled bridge plug device according to the present invention.

[0033] Figure 4 This is a schematic diagram of the electronically controlled bridge plug device according to the present invention.

[0034] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0035] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0036] Directional terms such as "upstream," "above," or similar terms refer to the direction closer to the wellhead, i.e. Figure 1 The left-hand direction in the middle. Directional terms like "downstream," "below," or similar terms refer to the direction away from the wellhead, i.e. Figure 1 The right side of the middle.

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] Figure 1 The structure of the electronically controlled bridge plug device 100 according to the present invention is schematically shown.

[0039] Figure 2 This is a schematic diagram of the first state of the electronically controlled bridge plug device 100 according to the present invention.

[0040] Figure 3 This is a schematic diagram of the second state of the electronically controlled bridge plug device 100 according to the present invention.

[0041] Figure 4 This is a schematic diagram of the structure of the electronically controlled bridge plug device 100 according to the present invention.

[0042] like Figure 1 As shown, according to a first aspect of the present invention, an electronically controlled bridge plug device 100 is provided, comprising a first connector 1 and an adjusting mechanism. Preferably, the adjusting mechanism is disposed downstream of the first connector 1 and includes a sleeve 2, a setting shaft 3, and a connecting sleeve 4.

[0043] In one embodiment, such as Figure 1 As shown, the sleeve 2 is located on the radially outer side, which can effectively protect the overall structure of the electrically controlled bridge plug device 100 and ensure that the electrically controlled bridge plug device 100 can work stably in the wellbore.

[0044] In one embodiment, such as Figure 1As shown, the setting shaft 3 is located radially inside. Preferably, the setting shaft 3 can be sealed to the inner circumferential surface of the sleeve 2, thereby effectively sealing the fluid in the second chamber 202 (described below) to ensure that the electrically controlled bridge plug device 100 can smoothly perform setting operations with the bridge plug 7 (described below) in the wellbore.

[0045] In one embodiment, such as Figure 1 As shown, the connecting sleeve 4 is disposed inside the sleeve 2, and the connecting sleeve 4 is sealed to the sleeve 2 and the seat shaft 3 respectively, thereby dividing the sleeve 2 into a first chamber 201 and a second chamber 202.

[0046] Accordingly, the first chamber 201 is located upstream of the second chamber 202, and the first chamber 201 is a sealed chamber enclosed by the first connector 1, the sleeve 2 and the connecting sleeve 4.

[0047] Accordingly, the second chamber 202 is a sealed chamber formed by the connecting sleeve 4, the sleeve 2 and the setting shaft 3, and in the initial state, the second chamber 202 contains fluid.

[0048] In a preferred embodiment, such as Figure 1 As shown, the first chamber 201 is connected to the second chamber 202 through the liquid transfer hole 421 (described below).

[0049] It is easy to understand that when the electrically controlled bridge plug device 100 is deployed into the wellbore, a pressure differential surface (i.e., pressure differential as referred to below) is formed between the setting shaft 3 and the connecting sleeve 4, which enables a tendency for relative movement between the setting shaft 3 and the connecting sleeve 4. Correspondingly, as the vertical depth of the wellbore where the electrically controlled bridge plug device 100 is located gradually increases, the force borne by the pressure differential surface will become greater and greater.

[0050] According to the present invention, such as Figure 1 As shown, the electrically controlled bridge plug device 100 also includes an electrical control mechanism. Preferably, the electrical control mechanism is disposed in the first chamber 201, and it can control the communication state between the first chamber 201 and the second chamber 202 through the fluid transmission hole 421, and further control the setting and sealing capability of the bridge plug 7 in the wellbore, the details of which are described below.

[0051] According to the present invention, such as Figure 2 and 3 As shown, the electrically controlled bridge plug device 100 also includes a bridge plug 7 for placement downstream of the sleeve 2. Preferably, after the first chamber 201 and the second chamber 202 are connected, the sleeve 2 is configured to move downstream under the action of pressure difference (pressure difference surface between the setting shaft 3 and the connecting sleeve 4), thereby causing the bridge plug 7 to be set in the wellbore.

[0052] According to a specific embodiment of the present invention, under the action of the electronic control mechanism, the present invention can make the first chamber 201 and the second chamber 202 not communicate, thereby ensuring that there is no relative displacement between the setting shaft 3 and the connecting sleeve 4 through the liquid column (fluid in the second chamber 202), and further ensuring that the bridge plug 7 can always maintain a stable state during the lowering process, thereby avoiding the situation of setting failure due to premature setting.

[0053] According to a specific embodiment of the present invention, the first chamber 201 is configured to communicate with the second chamber 202 under the action of the electronic control mechanism, and the sleeve 2 is configured to move downstream under the action of the aforementioned pressure difference to cause the bridge plug 7 to be seated in the wellbore.

[0054] In one embodiment, such as Figure 1 As shown, the electronic control mechanism includes a hydraulic cylinder 51. The hydraulic cylinder 51 is configured as a sealed chamber and installed in the first chamber 201. The first end of the hydraulic cylinder 51 can communicate with the second chamber 202 through the liquid transmission hole 421, and the second end of the hydraulic cylinder 51 can communicate with the first chamber 201.

[0055] It is easy to understand that fluid is also contained inside the cylinder 51, and this fluid can effectively restrict the axial position of the piston 52 (described below). Thus, the piston 52 can achieve the effect of closing the second chamber 202.

[0056] In one embodiment, such as Figure 1 As shown, the electronic control mechanism also includes a piston 52. Preferably, the piston 52 is disposed inside the hydraulic cylinder 51 and can temporarily block the second chamber 202, thereby ensuring that the electronically controlled bridge plug device 100 can smoothly reach the target location inside the wellbore.

[0057] Furthermore, before reaching the target position inside the wellbore, the bridge plug 7 can maintain a stable state under the action of the piston 52, thus preventing premature setting.

[0058] In one embodiment, such as Figure 1 As shown, the electronic control mechanism also includes a hydraulic lock 53. Preferably, the hydraulic lock 53 is disposed between the hydraulic cylinder 51 and the first chamber 201, thereby controlling the flow space of the fluid in the hydraulic cylinder 51. In other words, the hydraulic lock 53 can confine this portion of fluid within the hydraulic cylinder 51.

[0059] Correspondingly, the axial position of the piston 52 in the hydraulic cylinder 51 can be well limited, thereby the piston 52 can close the second chamber 202, thus ensuring that there is no relative displacement between the setting shaft 3 and the connecting sleeve 4 during the lowering of the electric control bridge plug device 100, and further ensuring that the bridge plug 7 can always maintain a stable state during the lowering process.

[0060] In a preferred embodiment, the hydraulic lock 53 is an electromagnetic hydraulic lock.

[0061] According to a specific embodiment of the invention, the piston 52 is configured to move upstream when the hydraulic lock 53 is opened, thereby allowing fluid in the second chamber 202 to flow to the first chamber 201. Consequently, the connecting sleeve 4 and the sleeve 2 are freed from the obstruction of the fluid in the second chamber 202, and thus move downstream under the action of pressure differential to cause the bridge plug 7 to set within the wellbore.

[0062] In one embodiment, such as Figure 2 and 3 As shown, a second connector 8, constructed as a hollow sleeve, is provided downstream of the bridge plug 7, and several spaced-apart bridge plugs 7 are arranged along the circumference of the second connector 8. In this way, the bridge plugs 7 can move radially outward under the action of the squeezing part 6 (described below), thereby being firmly anchored to the inner wall of the wellbore to achieve the purpose of setting.

[0063] In one embodiment, such as Figure 2 and 3 As shown, a cone-shaped compression portion 6 is provided between the sleeve 2 and the bridge plug 7. Correspondingly, the bridge plug 7 has a corresponding shape that can abut against the compression portion 6.

[0064] In this way, the outer peripheral surface of the extrusion section 6 can make full contact with the inner wall surface of the bridge plug 7. Furthermore, since the extrusion section 6 is cone-shaped, when the extrusion section 6 moves downstream with the sleeve 2, the bridge plug 7 will move radially outward under the action of the extrusion section 6, thereby firmly anchoring itself to the inner wall of the wellbore to achieve the purpose of setting.

[0065] According to a specific embodiment of the present invention, when the first chamber 201 is connected to the second chamber 202 under the action of the electronic control mechanism, the fluid in the second chamber 202 flows to the first chamber 201.

[0066] Correspondingly, the connecting sleeve 4 and the sleeve 2 can break free from the obstruction of the fluid in the second chamber 202, and thus move downstream under the action of pressure difference. At the same time, the squeezing part 6 moves downstream under the pushing action of the sleeve 2, thereby squeezing the bridge plug 7 to cause the bridge plug 7 to move radially outward, and thus be firmly anchored on the inner wall of the wellbore to achieve the purpose of setting.

[0067] In one embodiment, such as Figure 2 and 3As shown, a ratchet 71 extending radially outward is formed at the junction of the bridge plug 7 and the compression part 6. In this way, when the bridge plug 7 moves radially outward under the action of the compression part 6, the ratchet 71 can be firmly anchored to the inner wall of the wellbore, thereby improving the stability of the bridge plug 7 in setting within the wellbore.

[0068] Furthermore, due to the ratchet 71, as Figure 2 The structure shown is straight-toothed, which allows it to have a larger engagement area with the inner wall of the wellbore, making it easier to grip the inner wall of the wellbore and further improving the sealing performance inside the wellbore after setting.

[0069] In one embodiment, the bridge plug 7 has a plurality of teeth 72 extending radially outward and downward at an angle on its outer wall. In this way, the bridge plug 7 can more easily bite into the inner wall of the wellbore, further improving the setting ability of the bridge plug 7.

[0070] According to the present invention, such as Figure 1 As shown, the connecting sleeve 4 includes a first connecting sleeve portion 41. Preferably, the first connecting sleeve portion 41 is configured as a hollow sleeve.

[0071] In one embodiment, such as Figure 1 As shown, the connecting sleeve 4 also includes a second connecting sleeve portion 42 extending radially outward from the first connecting sleeve portion 41. Preferably, the second connecting sleeve portion 42 is capable of sealingly connecting with the inner circumferential surface of the sleeve 2, thereby dividing the sleeve 2 into a first chamber 201 and a second chamber 202.

[0072] In one embodiment, at least one fluid transfer hole 421 is provided circumferentially along the second connecting sleeve portion 42. Preferably, the fluid transfer hole 421 communicates the second chamber 202 with the hydraulic cylinder 51. Thus, when the hydraulic lock 53 is closed, the fluid in the hydraulic cylinder 51 flows to the first chamber 201. Since the piston 52 is no longer restricted by the fluid in the hydraulic cylinder 51, the fluid in the second chamber 202 is allowed to flow into the first chamber 201 sequentially through the fluid transfer hole 421 and the hydraulic cylinder 51.

[0073] According to the present invention, such as Figure 1 As shown, the seat shaft 3 is constructed in a cross shape and includes a first connecting portion 31. Preferably, the first connecting portion 31 is fixedly connected to the sleeve 2 by a first pin 301.

[0074] Specifically, when the hydraulic lock 53 is closed, the fluid in the second chamber 202 flows to the first chamber 201. At the same time, after the sleeve 2 is freed from the obstruction of the fluid in the second chamber 202, it shears off the first pin 301 under the action of pressure difference, thereby moving downstream to cause the bridge plug 7 to perform the setting operation.

[0075] In one embodiment, such as Figure 1 As shown, the seat shaft 3 also includes a second connecting portion 32. Preferably, the second connecting portion 32 extends from the first end of the first connecting portion 31. Furthermore, the second connecting portion 32 is always in a sealing connection with the first connecting sleeve portion 41, thereby forming an effective sealing effect on the second chamber 202.

[0076] In one embodiment, such as Figure 2 and 3 As shown, the seat shaft 3 also includes a third connecting portion 33. Preferably, the third connecting portion 33 extends from the second end of the first connecting portion 31. Furthermore, the third connecting portion 33 is fixedly connected to the second connector 8 by a second pin 302.

[0077] In one embodiment, such as Figure 1 As shown, a radially outwardly extending retaining ring groove 411 is formed on the inner circumferential surface of the first connecting sleeve portion 41. Preferably, the retaining ring groove 411 can lock with the third connecting portion 33 of the seat shaft 3.

[0078] In one specific embodiment, when the hydraulic lock 53 is closed, the fluid in the second chamber 202 flows to the first chamber 201. At the same time, after the sleeve 2 is freed from the obstruction of the fluid in the second chamber 202, it shears off the first pin 301 under the action of pressure difference, thereby moving downstream to cause the bridge plug 7 to perform the setting operation. Furthermore, the setting shaft 3 can move upstream after shearing off the second pin 302 under the action of further pressure difference, thereby forming a lock with the snap ring groove 411.

[0079] As is easily understood, the electrically controlled bridge plug device 100 is lowered into the wellbore via a cable (not shown in the attached drawings). Therefore, when the second pin 302 is cut and the third connecting portion 33 of the setting shaft 3 is locked with the snap ring groove 411, the electrically controlled bridge plug device 100 can be pulled out of the wellbore by lifting the cable, thus achieving the purpose of releasing it.

[0080] In one embodiment, such as Figure 1 As shown, sealing rings 9 are provided between the second connecting sleeve portion 42 of the sleeve 2 and the connecting sleeve 4, and between the first connecting portion 31 and the third connecting portion 33 of the sleeve 2 and the setting shaft 3. This ensures that the second chamber 202 has a good sealing environment under the action of the sealing rings 9, thereby ensuring that the bridge plug 7 can smoothly carry out the setting operation within the wellbore.

[0081] According to a second aspect of the present invention, a method for using an electronically controlled bridge plug device as described above is provided, in conjunction with the following... Figures 1 to 4 Let me introduce the specific operating steps.

[0082] First, the electronically controlled bridge plug device 100 is assembled with the bridge plug 7, and then deployed into the wellbore via a cable.

[0083] Then, the unlocking signal is transmitted to the hydraulic lock 53 via cable to perform the unlocking operation.

[0084] Specifically, the hydraulic lock 53 releases the restriction on the flow space of the fluid in the hydraulic cylinder 51, thereby releasing the restriction on the piston 52. As a result, the piston 52 can move axially within the hydraulic cylinder 51, further ensuring that the fluid in the second chamber 202 can flow to the first chamber 201.

[0085] Subsequently, the fluid in the second chamber 202 can flow into the first chamber 201 through the fluid transmission hole 421 and the hydraulic cylinder 51 in sequence. At the same time, the sleeve 2 shears off the first pin 301 under the action of pressure difference, and drives the connecting sleeve 4 to move downstream together, so that the bridge plug 7 is seated in the wellbore.

[0086] Specifically, when the electrically controlled bridge plug device 100 is engaged in the wellbore, a pressure differential surface is formed between the setting shaft 3 and the connecting sleeve 4, causing a tendency for relative movement between the setting shaft 3 and the connecting sleeve 4. Therefore, when the hydraulic lock 53 is closed, and the fluid in the second chamber 202 can flow to the first chamber 201, the connecting sleeve 4 and the sleeve 2 can shear off the first pin 301 under the action of the pressure differential and move downstream.

[0087] Specifically, the sleeve 2 can push the extrusion section 6 downstream, thereby causing the bridge plug 7 to move radially outward, and then firmly anchored on the inner wall of the wellbore to achieve the purpose of setting and sealing.

[0088] Subsequently, under the further pressure difference, the seat shaft 3 shears off the second pin 302 and moves upstream, thereby locking with the snap ring groove 411.

[0089] Finally, the electrically controlled bridge plug device 100 is pulled out of the wellbore by raising the cable to achieve the purpose of letting go.

[0090] In one embodiment, the construction process of the present invention includes the following steps.

[0091] 1) Well preparation: The pipe scraper is used for pipe scraping, followed by well cleaning and well washing using a well gauge;

[0092] 2) The first stage of fracturing operation is carried out using conventional perforation tools, followed by well washing with scraping fluid (without sand) at a rate of ≥1.5m3 / min, cleaning the volume of ≥1 wellbore;

[0093] 3) Use a cable to feed the tool string, and start the pump to pump the tool string to the predetermined position;

[0094] 4) Lower the tool to 30m above the predetermined position, increase the pumping flow rate to ≥2m3 / min, continue lowering to about 5m above the prefabricated short section (the bridge plug is located in the middle of the casing), and stop the pump;

[0095] 5) The cable control electrical bridge plug device 100 and bridge plug 7 are set. Wait 5-10 minutes. After the electrical bridge plug device 100 completes the setting of bridge plug 7, it is released.

[0096] 6) Continue to lift the tubing to the predetermined perforation position, then lift the tool to perform subsequent perforation and other operations;

[0097] 7) After removing the electronically controlled bridge piston device 100, push the hydraulic cylinder back to its original position, inject hydraulic oil, and prepare for subsequent construction operations;

[0098] 8) Throw the ball to pressurize the casing, perform casing fracturing, and inject fracturing fluid;

[0099] 9) After completing the second stage of fracturing, follow steps 5) to 8) to complete the subsequent fracturing operations.

[0100] This invention provides an electrically controlled bridge plug device and its usage method, which can effectively set the plug in deep and ultra-deep wells. It abandons the traditional gunpowder setting method and instead uses an electromagnetic hydraulic lock to achieve bridge plug setting by leveraging the pressure of the downhole fluid column (fluid in the second chamber 202). This method has advantages such as high safety, high reliability, low operating cost, and reusability.

[0101] Furthermore, under the action of the electronic control mechanism, the present invention can keep the first chamber 201 and the second chamber 202 in a non-communicating state, thereby ensuring that there is no relative displacement between the setting shaft 3 and the connecting sleeve 4 through the liquid column (fluid in the second chamber 202), and further ensuring that the bridge plug 7 can always maintain a stable state during the lowering process, thereby avoiding the situation of setting failure due to premature setting.

[0102] In addition, since the first connecting part 31 of the setting shaft 3 is fixedly connected to the sleeve 2 by the first pin 301, and the third connecting part 33 of the setting shaft 3 is fixedly connected to the second connector 8 by the second pin 302, it is ensured that the electronically controlled bridge plug device 100 can perform phased operations (setting and releasing) in the wellbore, which further improves the success rate of setting the bridge plug 7.

[0103] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0104] In this invention, unless otherwise explicitly specified and limited, the terms “installation,” “connection,” “linking,” “fixing,” etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0105] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0106] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electrically controlled bridge plug device, comprising: a first joint (1), an adjusting mechanism arranged downstream of the first joint (1), comprising a sleeve (2) arranged on the radial outside, a setting shaft (3) arranged on the radial inside, and a connecting sleeve (4) sealingly connected with the sleeve (2) and the setting shaft (3) respectively to divide the sleeve (2) into a first chamber (201) and a second chamber (202) containing fluid, wherein the sleeve (2) is relatively static with the setting shaft (3) in an initial state, an electrically controlled mechanism arranged in the first chamber (201) and connected with the second chamber (202), and a bridge plug (7) arranged downstream of the sleeve (2), wherein the first chamber (201) is capable of communicating with the second chamber (202) under the action of the electrically controlled mechanism, and the sleeve (2) is configured to move downstream under the action of pressure difference to facilitate the setting of the bridge plug (7) in the wellbore, the electrically controlled mechanism comprises a liquid cylinder (51) connected with the second chamber (202), a piston (52) arranged in the liquid cylinder (51) and used to block the second chamber (202), and a hydraulic lock (53) arranged upstream of the liquid cylinder (51), when the electrically controlled bridge plug device is set in the wellbore, a pressure difference surface is formed between the setting shaft (3) and the connecting sleeve (4), so that there is a tendency for relative movement between the setting shaft (3) and the connecting sleeve (4); after the hydraulic lock (53) is closed, the fluid in the second chamber (202) flows to the first chamber (201), and the sleeve (2) and the connecting sleeve (4) can move downward under the action of pressure difference, the connecting sleeve (4) comprises a first connecting sleeve part (41) and a second connecting sleeve part (42) extending radially outward from the first connecting sleeve part (41) and sealingly connected with the sleeve (2), wherein at least one liquid transmission hole (421) is arranged along the circumference of the second connecting sleeve part (42) to communicate the second chamber (202) with the liquid cylinder (51), a snap spring groove (411) extending radially outward is formed on the inner circumferential surface of the first connecting sleeve part (41) and used to fixedly connect with the setting shaft (3), a second joint (8) configured in the form of a hollow sleeve is arranged downstream of the bridge plug (7), the setting shaft (3) is configured in the form of a cross structure and comprises a first connecting part (31) configured in the form of a column and fixedly connected with the sleeve (2) through a first pin (301), a second connecting part (32) extending from a first end of the first connecting part (31) and sealingly connected with the first connecting sleeve part (41), and a third connecting part (33) extending from a second end of the first connecting part (31) and fixedly connected with the second joint (8) through a second pin (302).

2. The electrically controlled bridge plug apparatus of claim 1, wherein, an extrusion part (6) configured in the form of a vertebral body is arranged between the sleeve (2) and the bridge plug (7), the bridge plug (7) has a corresponding shape capable of abutting against the extrusion part (6).

3. The electrically controlled bridge plug apparatus of claim 2, wherein, A ratchet (71) extending radially outward and used for anchoring in the wellbore is formed at the joint of the bridge plug (7) and the extruding part (6).

4. The electrically controlled bridge plug apparatus of claim 3, wherein, A sealing ring (9) is arranged between the sleeve (2) and the second connecting sleeve part (42) and the setting shaft (3).

5. A method of using the electrically controlled bridge plug device according to any one of claims 1 to 4, comprising the following steps: S1, putting the bridge plug assembled with the electrically controlled bridge plug device into the wellbore; S2, opening the hydraulic lock (53) to make the fluid in the second chamber (202) flow into the first chamber (201) through the liquid transmission hole (421) and the liquid cylinder (51) in sequence; the sleeve (2) cuts the first pin (301) under the action of pressure difference and moves downstream to make the bridge plug (7) set in the wellbore; S3, the setting shaft (3) cuts the second pin (302) under the action of further pressure difference and moves upstream to form a joint with the snap spring slot (411) to take out the electrically controlled bridge plug device from the wellbore.

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