Separated layer water injection packer setting device

Abstract

The invention relates to the technical field of oil production engineering, in particular to a separated layer water injection packer seat sealing device which comprises a driving pipe fitting provided with a driving piece; the transmission pipe fitting is connected to the driving pipe fitting, the driving pipe fitting is provided with a transmission part, and the transmission part is connected to the driving part; the hydraulic cylinder is connected to the transmission pipe fitting; the bottom plug is provided with a capillary tube, the capillary tube communicates with the hydraulic cylinder, the capillary tube forms a branch, and the branch is used for corresponding to the multi-stage packer; the controller is electrically connected to the driving part; under the condition that the controller controls the driving piece to drive the transmission piece to move in the first direction, hydraulic oil in the hydraulic cylinder enters the capillary tube and enters an inner cavity of the multi-stage packer along the branch, and the multi-stage packer is used for setting; and under the condition that the controller controls the driving part to drive the transmission part to move in the second direction, hydraulic oil in the multi-stage packer enters the capillary tube along the branch and flows back into the hydraulic cylinder through the capillary tube, and unblocking of the multi-stage packer is achieved. The working process is simple and reliable, sealing performance is good, and working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil production engineering, and in particular to a stratified water injection packer seating device. Background Art

[0002] At present, there are many sand-producing wells and oil-returning wells in the injection wells of oil fields. The existing packers usually use mechanical seated packers, which are often blocked due to structural limitations of the backwash well channel, and have limited flow capacity due to physical space structure limitations. Mechanical seated packers require cement trucks when setting and pipe string construction when unsealing, which increases the difficulty and management cost of setting and unsealing. In addition, since the setting and unsealing need to be manually controlled, the timing of setting and unsealing is not accurately grasped, affecting the use of oil wells.

[0003] Therefore, it is necessary to propose a stratified water injection packer sealing device to at least partially solve the problems existing in the prior art. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the present invention provides a stratified water injection packer seating device.

[0006] In view of this, according to an embodiment of the present application, a stratified water injection packer sealing device is proposed, comprising:

[0007] A driving pipe is provided with a driving member;

[0008] A transmission pipe connected to the driving pipe, the driving pipe is provided with a transmission member, the transmission member is connected to the driving member, and the driving member is used to drive the transmission member to move in a first direction or in a second direction;

[0009] A hydraulic cylinder connected to the transmission pipe;

[0010] The bottom plug is provided with the capillary tube, the capillary tube is connected to the hydraulic cylinder, the capillary tube forms a branch, and the branch is used to correspond to the multi-stage packer;

[0011] A controller, electrically connected to the driving member;

[0012] Among them, when the above-mentioned controller controls the above-mentioned driving member to drive the above-mentioned transmission member to move in the first direction, the hydraulic oil in the above-mentioned hydraulic cylinder enters the above-mentioned capillary tube, and enters the inner cavity of the above-mentioned multi-stage packer along the above-mentioned branch line, so that the above-mentioned multi-stage packer is sealed; when the above-mentioned controller controls the above-mentioned driving member to drive the above-mentioned transmission member to move in the second direction, the hydraulic oil in the above-mentioned multi-stage packer enters the above-mentioned capillary tube along the above-mentioned branch line, and flows back to the above-mentioned hydraulic cylinder along the above-mentioned capillary tube, so as to realize the unsealing of the above-mentioned multi-stage packer.

[0013] In a feasible implementation manner, the above-mentioned stratified water injection packer sealing device further includes:

[0014] The cable pipe is connected to the driving pipe. The cable pipe is provided with a cable. The cable is connected to the driving member. The controller is arranged in the cable pipe.

[0015] In a feasible implementation manner, the driving pipe member includes:

[0016] First coat;

[0017] A motor, disposed in the first outer casing;

[0018] A motor key connected to the output shaft of the motor;

[0019] A transmission sleeve connected to the motor key and the transmission member;

[0020] The pressure ring is sleeved on the motor key and the transmission sleeve.

[0021] In a feasible implementation manner, the transmission pipe comprises:

[0022] A second outer sleeve, sleeved on the transmission member;

[0023] A piston connected to the transmission member;

[0024] A connecting ring, sleeved at the connection between the second outer sleeve and the hydraulic cylinder;

[0025] The petal ring is respectively connected to the second outer sleeve and the connecting ring, and is used to fix the second outer sleeve and the connecting ring.

[0026] In a feasible implementation manner, the transmission member includes:

[0027] A lead screw connected to the transmission sleeve;

[0028] A lead screw nut, threadedly connected to the lead screw;

[0029] A guide member, disposed between the lead screw nut and the second outer sleeve;

[0030] A lead screw cylinder abuts against the lead screw nut;

[0031] The bearing is arranged between the lead screw and the second outer sleeve.

[0032] In a feasible implementation manner, the transmission pipe further includes:

[0033] A retaining ring, sleeved on the lead screw and threadedly connected to the second outer sleeve;

[0034] The lead screw is formed with a protrusion, the retaining ring abuts against one side of the protrusion, and the bearing is located on the other side of the protrusion.

[0035] In a feasible implementation manner, the guide member is a guide key, which is arranged on the circumferential side of the lead screw nut, and a guide groove is arranged at a corresponding position of the second outer sleeve, and the guide key is located in the guide groove.

[0036] In a feasible implementation manner, the cable pipe comprises:

[0037] A third outer jacket connected to the first outer jacket, wherein the cable is arranged in the third outer jacket;

[0038] The positioning member is arranged on the third outer sleeve and connected to the cable.

[0039] In a feasible implementation manner, the above-mentioned stratified water injection packer sealing device further includes:

[0040] A first connecting member, disposed at a connection between the first outer jacket and the second outer jacket;

[0041] The second connecting member is arranged at the connection between the first outer sleeve and the third outer sleeve.

[0042] In a feasible implementation manner, the above-mentioned stratified water injection packer sealing device further includes:

[0043] A sealing rubber ring is arranged between the above-mentioned screw and the above-mentioned screw tube; and / or between the above-mentioned piston and the above-mentioned hydraulic cylinder; and / or between the above-mentioned bottom plug and the above-mentioned hydraulic cylinder; and / or between the above-mentioned first outer sleeve and the above-mentioned second outer sleeve; and / or between the above-mentioned first outer sleeve and the above-mentioned third outer sleeve; and / or in the above-mentioned third outer sleeve.

[0044] Compared with the prior art, the present invention at least includes the following beneficial effects: the stratified water injection packer sealing device provided in the embodiment of the present application is provided with a driving pipe, a transmission pipe, a hydraulic cylinder, a bottom plug and a controller. Among them, the driving pipe is connected to the transmission pipe, and the driving pipe is provided with a driving member, the transmission pipe is provided with a transmission member, the driving member is connected to the transmission member, and the driving member drives the transmission member to move in the first direction or in the second direction. The hydraulic cylinder is connected to the transmission pipe, and the transmission member can extend into the hydraulic chamber of the hydraulic cylinder when it moves in the first direction, and can leave the hydraulic chamber when it moves in the second direction. The bottom plug is provided with a capillary, and the capillary is connected to the hydraulic chamber of the hydraulic cylinder, the capillary forms a branch, and the branch corresponds to the multi-stage packer. The controller is electrically connected to the driving member. In this way, when the controller receives the sealing control signal, the controller controls the driving member to drive the transmission member to move in the first direction, reduce the volume of the hydraulic chamber, increase the pressure of the hydraulic oil, so that the hydraulic oil enters the capillary and enters the inner cavity of the multi-stage packer along the branch, so that the multi-stage packer can be sealed. When the controller receives the unsealing control signal, the controller controls the driving member to drive the transmission member to move in the second direction, increasing the volume of the hydraulic chamber to generate suction for the hydraulic oil in the inner cavity of the multi-stage packer, and flowing back to the hydraulic chamber along the branch and the capillary, thereby realizing the unsealing of the multi-stage packer. The above-mentioned stratified water injection packer sealing device has a simple structure and can realize repeated sealing and unsealing. No mechanical tools are required during the sealing and unsealing process, which reduces the difficulty of operation. It is controlled by the controller, has good fault tolerance, reduces the error rate, and reduces human intervention. In addition, through capillary control, there is no need to pressurize the sealing with oil pipes, so that the force of the pipe column can be balanced, and the multi-stage packers are in the same pressure system, which improves the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0046] Figure 1 A schematic structural diagram of a stratified water injection packer sealing device according to an embodiment of the present application;

[0047] Figure 2 for Figure 1 One of the partial enlarged cross-sectional views of the stratified water injection packer sealing device shown;

[0048] Figure 3 for Figure 1 The second partial enlarged cross-sectional view of the stratified water injection packer sealing device shown;

[0049] Figure 4 for Figure 1 The third partially enlarged cross-sectional view of the stratified water injection packer sealing device is shown.

[0050] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0051] 110 driving pipe fittings, 111 first outer sleeve, 112 motor key, 113 transmission sleeve, 114 pressure ring, 120 transmission pipe fittings, 121 second outer sleeve, 122 piston, 123 petal ring, 124 retaining ring, 125 connecting ring, 130 transmission parts, 131 lead screw, 132 lead screw nut, 133 lead screw barrel, 134 bearing, 140 hydraulic cylinder, 150 bottom plug, 151 capillary tube, 160 controller, 170 cable pipe fittings, 171 third outer sleeve, 172 pin, 173 anti-rotation pin, 174 cable plug connector, 175 motor connector, 180 first connecting part, 190 second connecting part, 200 sealing rubber ring. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0053] like Figures 1 to 4 As shown, according to an embodiment of the present application, a stratified water injection packer sealing device is proposed, including: a driving pipe 110, which is provided with a driving member; a transmission pipe 120, which is connected to the driving pipe 110, and the driving pipe 110 is provided with a transmission member 130, and the transmission member 130 is connected to the driving member, and the driving member is used to drive the transmission member 130 to move in a first direction or in a second direction; a hydraulic cylinder 140, which is connected to the transmission pipe 120; a bottom plug 150, which is provided with a capillary 151, and the capillary 151 is connected to the hydraulic cylinder 140, and the capillary 151 forms a branch, and the branch is used to correspond to the multi-stage packer device; a controller 160, which is electrically connected to the above-mentioned driving member; wherein, when the above-mentioned controller 160 controls the above-mentioned driving member to drive the above-mentioned transmission member 130 to move in the first direction, the hydraulic oil in the above-mentioned hydraulic cylinder 140 enters the above-mentioned capillary 151, and enters the inner cavity of the above-mentioned multi-stage packer along the above-mentioned branch, so that the above-mentioned multi-stage packer is sealed; when the above-mentioned controller 160 controls the above-mentioned driving member to drive the above-mentioned transmission member 130 to move in the second direction, the hydraulic oil in the above-mentioned multi-stage packer enters the above-mentioned capillary 151 along the above-mentioned branch, and flows back to the above-mentioned hydraulic cylinder 140 along the above-mentioned capillary 151, so as to realize the unsealing of the above-mentioned multi-stage packer.

[0054] It can be understood that the stratified water injection packer sealing device provided in the embodiment of the present application is provided with a driving pipe 110, a transmission pipe 120, a hydraulic cylinder 140, a bottom plug 150 and a controller 160. Among them, the driving pipe 110 is connected to the transmission pipe 120, and the driving pipe 110 is provided with a driving member, the transmission pipe 120 is provided with a transmission member 130, the driving member is connected to the transmission member 130, and the transmission member 130 is driven by the driving member to move in the first direction or in the second direction. The hydraulic cylinder 140 is connected to the transmission pipe 120, and the transmission member 130 can extend into the hydraulic chamber of the hydraulic cylinder 140 when moving in the first direction, and can leave the hydraulic chamber when moving in the second direction. The bottom plug 150 is provided with a capillary 151, and the capillary 151 is connected to the hydraulic chamber of the hydraulic cylinder 140, and the capillary 151 forms a branch, and the branch corresponds to the multi-stage packer. The controller 160 is electrically connected to the driving member. In this way, when the controller 160 receives a sealing control signal, the controller 160 controls the driving member to drive the transmission member 130 to move in the first direction, reduce the volume of the hydraulic chamber, increase the pressure of the hydraulic oil, so that the hydraulic oil enters the capillary 151 and enters the inner cavity of the multi-stage packer along the branch, so that the multi-stage packer is sealed. When the controller 160 receives an unsealing control signal, the controller 160 controls the driving member to drive the transmission member 130 to move in the second direction, increase the volume of the hydraulic chamber, so as to generate suction for the hydraulic oil in the inner cavity of the multi-stage packer, and flow back into the hydraulic chamber along the branch and the capillary 151, so as to unseal the multi-stage packer. The above-mentioned stratified water injection packer sealing device has a simple structure, can realize repeated sealing and unsealing, and does not require the use of mechanical tools during the sealing and unsealing process, reducing the difficulty of operation, and is controlled by the controller 160, has good fault tolerance, reduces the error rate, and reduces human intervention. Furthermore, the capillary 151 is controlled, and there is no need to pressurize the oil pipe to seal the pipe, so that the force on the pipe string can be balanced, and the multi-stage packers are in the same pressure system, thereby improving the sealing performance.

[0055] It is understandable that the controller 160 can be controlled by pressure control. When receiving the first pressure signal, the controller 160 controls the driving member to drive the transmission member 130 to move in the first direction. When receiving the second pressure signal, the controller 160 controls the driving member to drive the transmission member 130 to move in the second direction. Exemplarily, the first pressure signal is that the operator applies a pressure of 10MPa to the wellbore three times on the ground in an odd number of times, and the pressure is maintained for 10 minutes each time. When the controller 160 receives the first pressure signal, the multi-stage packer can be sealed. The second pressure signal is that the operator applies a pressure of 10MPa to the wellbore three times on the ground in an even number of times, and the pressure is maintained for 10 minutes each time. When the controller 160 receives the second pressure signal, the multi-stage packer can be unsealed.

[0056] It is understandable that the existing well-washing valves of the packers are mostly piston 122 type, relying on the sealing ring to achieve radial dynamic sealing, which is greatly affected by the processing accuracy of the dynamic sealing surface and the quality control of the sealing ring. Especially in the well conditions with high frequency of well washing, the life of the sealing ring is difficult to guarantee underground, and it is easy to be damaged, corroded, extruded, etc., resulting in the failure of the well-washing valve in the later stage. After passing through the multi-stage packer, there is leakage of well-washing fluid and serious pressure decay. The packer used in this application is an expansion packer. After the hydraulic oil enters the inner cavity of the expansion packer from the branch, the expansion packer can be sealed, and after the hydraulic oil is discharged, the expansion packer can be completely unsealed, thereby forming a large channel for well washing. The expansion packer does not require a well-washing valve, so there will be no problem of packer failure, which improves the reliability of sealing and unsealing. And it can achieve repeated sealing and unsealing.

[0057] In some examples, such as Figures 1 to 4 As shown, the above-mentioned stratified water injection packer sealing device also includes: a cable pipe 170, connected to the above-mentioned driving pipe 110, the above-mentioned cable pipe 170 is provided with a cable, the above-mentioned cable is connected to the above-mentioned driving component, and the above-mentioned controller 160 is arranged in the above-mentioned cable pipe 170.

[0058] It can be understood that the stratified water injection packer sealing device is further provided with a cable pipe 170, which is connected to the driving pipe 110, and a cable is provided in the cable pipe 170, which is connected to the driving member to supply power to the driving member, and the controller 160 is provided in the cable pipe 170. The controller 160 is fixed and protected by the cable pipe 170.

[0059] In some examples, such as Figures 1 to 4 As shown, the driving pipe 110 includes: a first outer sleeve 111; a motor, which is arranged in the first outer sleeve 111; a motor key 112, which is connected to the output shaft of the motor; a transmission sleeve 113, which is connected to the motor key 112 and the transmission member 130; and a pressure ring 114, which is sleeved on the motor key 112 and the transmission sleeve 113.

[0060] It is understandable that the driving pipe 110 is provided with a first outer sleeve 111, a motor, a motor key 112, a transmission sleeve 113 and a pressure ring 114. Among them, the first outer sleeve 111 can be used as a protective shell to protect the components placed therein. The motor is arranged in the first outer sleeve 111 and connected to the cable. The motor key 112 is connected to the output shaft of the motor, and the transmission sleeve 113 is connected to the motor key 112 and the transmission member 130, so that when the motor is running, the power of the motor is transmitted to the transmission member 130 through the transmission sleeve 113. By controlling the rotation direction of the motor, the moving direction of the transmission member 130 is controlled. The pressure ring 114 is sleeved on the motor key 112 and the transmission sleeve 113, so as to limit the motor key 112 and the transmission sleeve 113, avoid radial displacement of the motor key 112 and the transmission sleeve 113 when the motor is running, and improve reliability and stability.

[0061] In some examples, such as Figures 1 to 4 As shown, the transmission pipe 120 includes: a second outer sleeve 121, which is sleeved on the transmission member 130; a piston 122, which is connected to the transmission member 130; a connecting ring 125, which is sleeved on the connection between the second outer sleeve 121 and the hydraulic cylinder 140; and a petal ring 123, which is respectively connected to the second outer sleeve 121 and the connecting ring 125, and is used to fix the second outer sleeve 121 and the connecting ring 125.

[0062] It can be understood that the transmission pipe 120 is provided with a second outer sleeve 121, a piston 122, a connecting ring 125 and a petal ring 123. Among them, the second outer sleeve 121 can be used as a protective shell to protect the components placed therein. The transmission member 130 is arranged in the second outer sleeve 121, and the piston 122 is connected to the transmission member 130. The transmission member 130 can drive the piston 122 to move in the first direction to squeeze the hydraulic cavity, or drive the piston 122 to move in the second direction to expand the hydraulic cavity. The connecting ring 125 is arranged at the connection between the second outer sleeve 121 and the hydraulic cylinder 140. The relative position of the second outer sleeve 121 and the hydraulic cylinder 140 is limited by the connecting ring 125, so that the connection between the second outer sleeve 121 and the hydraulic cylinder 140 is stable. In addition, grooves are provided at corresponding positions of the connecting ring 125 and the second outer sleeve 121, and the petal ring 123 is arranged in the grooves of the connecting ring 125 and the second outer sleeve 121, thereby further avoiding axial misalignment of the second outer sleeve 121 and the hydraulic cylinder 140, and further improving the connection tightness of the second outer sleeve 121 and the hydraulic cylinder 140.

[0063] In some examples, such as Figures 1 to 4As shown, the transmission member 130 includes: a lead screw 131, connected to the transmission sleeve 113; a lead screw 131 nut, threadedly connected to the lead screw 131; a guide member, arranged between the lead screw 131 nut and the second outer sleeve 121; a lead screw cylinder 133, abutting against the lead screw 131 nut; and a bearing 134, arranged between the lead screw 131 and the second outer sleeve 121.

[0064] It is understandable that the transmission member 130 may be provided with a lead screw 131, a lead screw nut 132, a lead screw cylinder 133, a retaining ring 124 and a bearing 134. The lead screw 131 is connected to the transmission sleeve 113, and the driving force of the motor is transmitted to the lead screw 131 through the motor key 112 and the transmission sleeve 113 to drive the lead screw 131 to rotate. The lead screw nut 132 is threadedly connected to the lead screw 131 and can be screwed on the lead screw 131, and the guide member is provided between the lead screw nut 132 and the second outer sleeve 121, so that when the lead screw 131 rotates, the lead screw nut 132 is restricted from rotating therewith and only performs linear motion. The screw barrel 133 is in contact with the screw nut 132. When the motor drives the screw 131 to rotate and drives the screw nut 132 to move linearly in the first direction, the screw nut 132 can push the screw barrel 133 to move in the first direction, so that the screw barrel 133 pushes the piston 122 to move in the first direction, so as to reduce the volume of the hydraulic chamber, increase the pressure of the hydraulic oil, and make the hydraulic oil enter the capillary 151 and enter the inner cavity of the multi-stage packer along the branch, so that the multi-stage packer can be sealed. When the motor drives the screw 131 to rotate and drives the screw nut 132 to move linearly in the second direction, the screw nut 132 can push the screw barrel 133 to move in the second direction, so that the screw barrel 133 pushes the piston 122 to move in the second direction, so as to increase the volume of the hydraulic chamber, so as to generate suction for the hydraulic oil in the inner cavity of the multi-stage packer, and flow back into the hydraulic chamber along the branch and the capillary 151, so as to realize the unsealing of the multi-stage packer. The bearing 134 is disposed between the lead screw 131 and the second sleeve 121 , so that the lead screw 131 can rotate more smoothly, reduce friction, improve rotation stability, and extend service life.

[0065] In some examples, such as Figures 1 to 4 As shown, the transmission pipe 120 further includes: a retaining ring 124, which is sleeved on the lead screw 131 and threadedly connected to the second outer sleeve 121; the lead screw 131 is formed with a protrusion, the retaining ring 124 abuts against one side of the protrusion, and the bearing 134 is located on the other side of the protrusion.

[0066] It is understandable that the transmission pipe 120 is also provided with a retaining ring 124. Specifically, the inner wall of the second outer sleeve 121 is formed with threads, and the retaining ring 124 can be threadedly connected to the second outer sleeve 121. The lead screw 131 is formed with a protrusion, and one side of the protrusion abuts against the retaining ring 124, and the other side of the protrusion abuts against the bearing 134. In this way, on the one hand, the radial displacement of the lead screw 131 is limited by the retaining ring 124, which plays a fixing role on the lead screw 131. On the other hand, by screwing the retaining ring 124, the retaining ring 124 can be moved in a direction close to the bearing 134, but the other side of the protrusion of the lead screw 131 abuts against the bearing 134, thereby achieving pre-tightening of the bearing 134.

[0067] In some examples, such as Figures 1 to 4 As shown, the guide member is a guide key, which is arranged on the circumferential side of the screw nut 132, and a guide groove is arranged at a corresponding position of the second outer sleeve 121, and the guide key is located in the guide groove.

[0068] It is understandable that the guide member can be a guide key. Specifically, the guide key is arranged on the circumference of the lead screw nut 132, and a guide groove is arranged at a corresponding position of the second outer sleeve 121, and the guide key can be located in the guide groove, thereby limiting the rotation of the lead screw nut 132, so that the lead screw nut 132 only moves in a straight line.

[0069] In some examples, such as Figures 1 to 4 As shown, the cable pipe 170 includes: a third outer sleeve 171 connected to the first outer sleeve 111, and the cable is arranged in the third outer sleeve 171; and a positioning member arranged in the third outer sleeve 171 and connected to the cable.

[0070] It is understandable that the cable tube 170 is also provided with a third outer jacket 171 and a positioning member. The third outer jacket 171 can be used as a protective shell to protect the components therein. The third outer jacket 171 is connected to the first outer jacket 111, and the cable is arranged in the third outer jacket 171. The positioning member is arranged in the third outer jacket 171 and connected to the cable, thereby fixing the relative position of the cable and the third outer jacket 171, avoiding the cable from twisting and the cable and the motor from falling off, and improving reliability.

[0071] For example, the positioning member may be provided with a pin 172 and an anti-rotation pin 173 to fix the axial position and radial position of the cable to prevent the cable from rotating. A cable plug connector 174 and a motor connector 175 may also be provided in the third outer sleeve 171, and the cable is connected to the external environment through the cable plug connector 174. The motor connector 175 makes the cable connection to the motor more stable.

[0072] In some examples, such as Figures 1 to 4As shown, the above-mentioned stratified water injection packer sealing device also includes: a first connecting member 180, which is arranged at the connection between the above-mentioned first outer casing 111 and the above-mentioned second outer casing 121; and a second connecting member 190, which is arranged at the connection between the above-mentioned first outer casing 111 and the above-mentioned third outer casing 171.

[0073] It is understandable that the stratified water injection packer sealing device is also provided with a first connecting member 180 and a second connecting member 190. The first connecting member 180 makes the connection between the first outer casing 111 and the second outer casing 121 more stable, and the second connecting member 190 makes the connection between the first outer casing 111 and the third outer casing 171 more stable, thereby improving the overall structural strength of the stratified water injection packer sealing device and improving reliability.

[0074] In some examples, such as Figures 1 to 4 As shown, the above-mentioned stratified water injection packer sealing device also includes: a sealing rubber ring 200, which is arranged between the above-mentioned screw 131 and the above-mentioned screw tube 133; and / or arranged between the above-mentioned piston 122 and the above-mentioned hydraulic cylinder 140; and / or arranged between the above-mentioned bottom plug 150 and the above-mentioned hydraulic cylinder 140; and / or arranged between the above-mentioned first outer sleeve 111 and the above-mentioned second outer sleeve 121; and / or arranged between the above-mentioned first outer sleeve 111 and the above-mentioned third outer sleeve 171; and / or arranged in the above-mentioned third outer sleeve 171.

[0075] It can be understood that the layered water injection packer sealing device is provided with a plurality of sealing rubber rings 200. Specifically, the sealing rubber ring 200 can seal between the screw 131 and the screw barrel 133; can seal between the piston 122 and the hydraulic cylinder 140; can seal between the bottom plug 150 and the hydraulic cylinder 140; can seal between the first outer sleeve 111 and the second outer sleeve 121; can seal between the first outer sleeve 111 and the third outer sleeve 171; can seal the cable connector 174 and the motor connector 175 in the third outer sleeve 171, so as to prevent the liquid from affecting the motor and the control device and improve the stability.

[0076] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0078] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stratified water injection packer sealing device, characterized in that: include: A driving pipe is provided with a driving member; A transmission pipe connected to the driving pipe, wherein the driving pipe is provided with a transmission member, wherein the transmission member is connected to the driving member, and the driving member is used to drive the transmission member to move in a first direction or in a second direction; A hydraulic cylinder connected to the transmission pipe; A bottom plug is provided with a capillary tube, the capillary tube is connected to the hydraulic cylinder, the capillary tube forms a branch, and the branch is used to correspond to a multi-stage packer; A controller, electrically connected to the driving member; Wherein, when the controller controls the driving member to drive the transmission member to move in the first direction, the hydraulic oil in the hydraulic cylinder enters the capillary tube and enters the inner cavity of the multi-stage packer along the branch, so that the multi-stage packer is seated; When the controller controls the driving member to drive the transmission member to move in the second direction, the hydraulic oil in the multi-stage packer enters the capillary along the branch and flows back to the hydraulic cylinder along the capillary to release the multi-stage packer.

2. The stratified water injection packer sealing device according to claim 1, characterized in that: Also includes: A cable tube is connected to the driving tube. The cable tube is provided with a cable. The cable is connected to the driving member. The controller is arranged in the cable tube.

3. The stratified water injection packer sealing device according to claim 2, characterized in that: The driving pipe comprises: First coat; A motor, disposed on the first outer casing; A motor key connected to the output shaft of the motor; A transmission sleeve connected to the motor key and the transmission member; A pressure ring is sleeved on the motor key and the transmission sleeve.

4. The stratified water injection packer sealing device according to claim 3, characterized in that: The transmission pipe comprises: A second outer sleeve, sleeved on the transmission member; A piston connected to the transmission member; A connecting ring, sleeved at the connection between the second outer sleeve and the hydraulic cylinder; The petal ring is respectively connected to the second outer sleeve and the connecting ring, and is used to fix the second outer sleeve and the connecting ring.

5. The stratified water injection packer sealing device according to claim 4, characterized in that: The transmission member comprises: A lead screw connected to the transmission sleeve; A lead screw nut, threadedly connected to the lead screw; A guide member, disposed between the lead screw nut and the second outer sleeve; A lead screw cylinder abuts against the lead screw nut; A bearing is arranged between the lead screw and the second outer sleeve.

6. The stratified water injection packer sealing device according to claim 5, characterized in that: The transmission pipe also includes: A retaining ring, sleeved on the lead screw and threadedly connected to the second outer sleeve; The lead screw is formed with a protrusion, the retaining ring abuts against one side of the protrusion, and the bearing is located on the other side of the protrusion.

7. The stratified water injection packer sealing device according to claim 5, characterized in that: The guide member is a guide key, which is arranged on the circumferential side of the lead screw nut. A guide groove is arranged at a corresponding position of the second outer sleeve, and the guide key is located in the guide groove.

8. The stratified water injection packer sealing device according to claim 5, characterized in that: The cable fittings include: A third outer jacket connected to the first outer jacket, wherein the cable is arranged in the third outer jacket; A positioning member is arranged on the third outer sleeve and connected to the cable.

9. The stratified water injection packer sealing device according to claim 8, characterized in that: Also includes: A first connecting member, disposed at a connection between the first outer jacket and the second outer jacket; The second connecting member is arranged at the connection between the first outer sleeve and the third outer sleeve.

10. The stratified water injection packer sealing device according to claim 9, characterized in that: Also includes: A sealing rubber ring is arranged between the lead screw and the lead screw tube; and / or between the piston and the hydraulic cylinder; and / or between the bottom plug and the hydraulic cylinder; and / or between the first outer sleeve and the second outer sleeve; and / or between the first outer sleeve and the third outer sleeve; and / or inside the third outer sleeve.

Images