Spiral flow directional structure applied in cementing engineering

Abstract

The present invention relates to the technical field of cementing engineering, and discloses a spiral flow type guiding structure applied in cementing engineering. Based on a packer applied in cementing engineering, an externally mounted guiding structure is added for the downhole direction of the packer during operation. Essentially, it is composed of multiple dynamic components. Each dynamic component consists of a front-position ferrule, a rear-position ferrule, and a dynamic guiding spring frame between the two. When performing straightening and guiding, the front-position ferrule and the rear-position ferrule have small-amplitude spiral movements, and the spiral directions of the two are opposite. The purpose is to, when changing the bending degree of the dynamic guiding spring frame in cooperation with the wellbore environment, first transfer the possible stress changes to the dynamic guiding spring frame through the dynamic switching process, and convert the stress changes into hydraulic changes through the stress unloading method of the intermediate kinetic energy ring structure, and change the rear wing guiding ring to assist in guiding. Mainly, on the basis of achieving the guiding purpose, the guiding stability is improved through the guiding process from multiple angles.

Description

Technical Field

[0001] The present invention relates to the technical field of cementing engineering, and specifically to a spiral flow - type guiding structure applied in cementing engineering. Background Art

[0002] Cementing engineering mainly includes two key technologies: lowering the casing and grouting. For the grouting technology, reference can be made to the relevant content in the publications with publication numbers CN108119093A and CN116163673A. Here, specific description is made for the technology of lowering the casing, and reference can be made to the publications with publication numbers CN102454381A and CN111894512A.

[0003] Supplementary description for the technology of lowering the casing: Specifically, packers and float collars are mainly used. The packer mainly plays two key roles of separating and sealing, and a centralizing structure is additionally arranged to maintain the central position of the packer relative to the wellbore. However, the wellbore environment is relatively complex (the wellbore trajectory is complex), such as the wellbores of extended - reach wells and highly deviated wells. The conventional centralizing structures are relatively simple, such as the relevant content involved in CN113286931A and CN110043199A.

[0004] The essence of the centralizing process is to "forcibly change" the central position of structures such as the casing relative to the wellbore according to the well wall. However, due to the complexity of the wellbore environment, there is a large friction between the rib plate or snap ring structure at a certain position of the centralizer and the wellbore wall, while at another position, there may be no contact with the wellbore wall. In this state, it directly affects the action stability of structures such as the casing and packer when they are lowered into the well. Specifically, it is manifested as: the casing and packer show an indefinite swinging action state due to the centralizing process generated by the centralizer and the wellbore, and even an abnormal problem that the centralizer is directly stuck in the wellbore. For this, the present invention proposes a solution. Summary of the Invention

[0005] The purpose of the present invention is to provide a spiral flow - type guiding structure applied in cementing engineering to solve the following problems: For the technology of lowering the casing in cementing engineering, and specifically for the centralizing process in the technology of lowering the casing, the conventional centralizer structure is mainly designed directionally to achieve the purpose of "forced guiding". However, due to the complexity of the wellbore environment, the centralizing effect generated by the centralizer will directly affect the action stability of structures such as the casing and the separator when they are lowered into the well, such as an indefinite swinging action, or even a serious engineering accident that the centralizer is directly stuck in the wellbore.

[0006] The object of the present invention can be achieved by the following technical solutions: a spiral flow guiding structure applied in the cementing engineering, which is used in a packer in the cementing engineering. The spiral flow guiding structure is installed at one end of the packer and includes an installation sleeve, a front sleeve ring, a rear sleeve ring, a dynamic guiding spring frame and a rear oil ring;

[0007] The front sleeve ring and the rear sleeve ring are threadedly connected to the installation sleeve, and ball head rods I are arranged on the outer wall positions of the front sleeve ring and the rear sleeve ring. The dynamic guiding spring frame is arranged on the ball head rods I on the front sleeve ring and the rear sleeve ring, and the front sleeve ring and the rear sleeve ring in adjacent positions form a dynamic part. An intermediate kinetic energy ring is arranged between each adjacent pair of dynamic parts;

[0008] The rear oil ring is installed on the outer wall position at one end of the installation sleeve. A passive oil cavity is opened in the inner position of the installation sleeve corresponding to the rear oil ring, and an oil pipeline is connected between the inside of the intermediate kinetic energy ring and the passive oil cavity.

[0009] It is further set that: the spiral flow guiding structure is arranged at one end of the packer, and the direction from the spiral flow guiding structure to the slip structure in the packer is the downhole direction of the packer.

[0010] It is further set that: both ends of the ball head rod I are movably connected to the positions of the front sleeve ring, the rear sleeve ring and both ends of the dynamic guiding spring frame, and the ball head rod I is arranged in a circular array along the center point position of the installation sleeve.

[0011] It is further set that: the dynamic guiding spring frame is arched along the direction deviating from the outer wall of the installation sleeve, and the dynamic guiding spring frame is inclined along the length direction of the installation sleeve in the dynamic part.

[0012] It is further set that: the inclination directions of the dynamic guiding spring frames in each group of adjacent dynamic parts are opposite, and the threaded rotation directions of the front sleeve ring and the rear sleeve ring in the dynamic part with respect to the installation sleeve are opposite. The installation sleeves are arranged in sequence along the setting direction of the dynamic part, and each installation sleeve is connected by a long handle screw rod.

[0013] It is further set that: the intermediate kinetic energy ring is composed of a rubber ring and two kinetic energy contact pieces. The rubber ring is connected between the two kinetic energy contact pieces, and the kinetic energy contact pieces are respectively arranged corresponding to the outer wall positions of the front sleeve ring and the rear sleeve ring. The oil pipeline penetrates through the rubber ring and is communicated with the inside of the rubber ring.

[0014] It is further set that: the oil pipeline is communicated with the inside of the passive oil cavity. Ball head rods II and guide rods are respectively arranged on the outer wall position of the rear oil ring along the downhole direction of the packer. The top end of the ball head rod II is movably connected to a rear wing guiding ring.

[0015] Further set as: The second ball head rod is installed on the outer wall position of the rear oil ring along the direction parallel to the diameter of the rear oil ring. The guide rod is slidably connected to the rear oil ring along the direction parallel to the diameter of the rear oil ring. A pressure-receiving ring plate is installed at the lower end position of the guide rod in the passive oil cavity, and a wave strip corresponding to the rear wing guide ring is installed at the top end position of the guide rod.

[0016] The present invention has the following beneficial effects:

[0017] Based on the packer used in the cementing project, an externally installed guiding structure is added. First, it is necessary to ensure that the guiding structure does not interfere with the normal lowering process of the packer. By changing the installation position of the guiding structure relative to the packer, the overall guiding structure adopts a rear guiding method compared to the lowering method of the packer. Its essence consists of multiple dynamic components. Each dynamic component is composed of a front position ferrule, a rear position ferrule, and a dynamic guiding spring frame between them. When performing straightening and guiding, the front position ferrule and the rear position ferrule have small-amplitude spiral movements, and their spiral directions are opposite. The purpose is to change the bending degree of the dynamic guiding spring frame when cooperating with the wellbore environment. Through the dynamic switching process, the possible stress changes are first transmitted to the dynamic guiding spring frame, thereby playing a role in straightening and guiding;

[0018] Combined with the above content for summary: For further optimization of the dynamic component, first, it is necessary to limit the spiral directions of the front position ferrule and the rear position ferrule relative to the installation joint sleeve. In this way, the way the dynamic guiding spring frame is stretched or compressed is changed, thereby changing the bending degree of the dynamic guiding spring frame. An intermediate kinetic energy ring is set between each adjacent dynamic component, and through the stress relief method of this intermediate kinetic energy ring structure, the stress change is converted into a hydraulic change, and the rear wing guide ring is changed to assist in guiding. Mainly on the basis of achieving the guiding purpose, the guiding stability is improved through the guiding process from multiple angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the application of the spiral flow direction type guiding structure applied in the cementing project in the packer proposed by the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the spiral flow direction type guiding structure in the present invention;

[0022] Figure 3 In the present inventionFigure 2 Exploded view;

[0023] Figure 4 Schematic structural diagram of the front ferrule and the rear ferrule in the present invention;

[0024] Figure 5 In the present invention Figure 2 Cross-sectional view;

[0025] Figure 6 In the present invention Figure 5 Schematic structural diagram of part A in

[0026] In the figure: 1, mounting joint sleeve; 101, passive oil chamber; 102, oil pipeline; 2, rear ferrule; 3, intermediate kinetic energy ring; 4, front ferrule; 5, rear wing guide ring; 6, rear oil ring; 7, dynamic guide spring frame; 8, ball head rod one; 9, guide rod; 10, compression ring plate; 11, ball head rod two; 12, packer. Specific embodiments

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1: For the pipe-laying technology in the cementing project, and specifically for the straightening process in the pipe-laying technology, conventionally, the straightening device structure designed directionally is mainly used to achieve the purpose of "forced guidance". However, due to the complexity of the wellbore environment, the straightening effect generated by the straightening device will directly affect the movement stability of structures such as the casing and the separator when they are lowered into the well. For example, there may be an indefinite swinging movement, or even a serious engineering accident where the straightening device gets stuck in the wellbore. Therefore, the following technical solutions are proposed:

[0029] Referring to Figures 1 - 6 , the spiral flow type guiding structure applied in the cementing project in this embodiment is used in the packer 12 in the cementing project. The spiral flow type guiding structure is installed at one end of the packer 12 and includes a mounting joint sleeve 1, a front ferrule 4, a rear ferrule 2, a dynamic guide spring frame 7 and a rear oil ring 6;

[0030] The front ferrule 4 and the rear ferrule 2 are threadedly connected to the mounting joint sleeve 1, and ball head rods one 8 are provided on the outer wall positions of the front ferrule 4 and the rear ferrule 2. A dynamic guide spring frame 7 is provided on the ball head rods one 8 on the front ferrule 4 and the rear ferrule 2, and the front ferrule 4 and the rear ferrule 2 in adjacent positions form a dynamic part, and an intermediate kinetic energy ring 3 is provided between each adjacent dynamic part;

[0031] The rear oil ring 6 is installed on the outer wall position at one end of the installation sleeve 1. A passive oil cavity 101 is provided in the corresponding inner position of the installation sleeve 1 for the rear oil ring 6. An oil pipeline 102 is connected between the inside of the intermediate kinetic energy ring 3 and the passive oil cavity 101. The setting direction of the spiral flow guiding structure corresponds to the downhole direction of the packer 12, and the spiral flow guiding structure is arranged in the opposite direction of the downhole direction in the slip structure of the packer 12. The dynamic guiding spring frame 7 is arched along the direction deviating from the outer wall of the installation sleeve 1, and the dynamic guiding spring frame 7 is inclined along the length direction of the installation sleeve 1 in the dynamic part.

[0032] Basic principle: Briefly describe the cementing project, which specifically includes four steps: casing running, cement injection, waiting for setting, and quality inspection. Among them, casing running is the key step in the overall operation process. The packer 12 is a basic structure in the cementing project. For example, the packer 12 is connected to the designed position of the casing string (such as above the open hole section or complex formation), and accessories such as a guide shoe and a choke plate are installed, and the lowering speed is controlled to avoid damage to the rubber cylinder or valve system caused by collision. In this regard, the present invention improves based on the packer 12 by optimizing the guiding method and will not directly affect the basic structure composition of the packer 12;

[0033] The guiding structure proposed by the present invention is specifically as Figure 2 shown, and is installed on the packer 12 according to Figure 1 shown, and with reference to the slips, rubber cylinder and downhole direction on the packer 12. If Figure 2 the packer 12 in Figure 1 is lowered downhole in the direction from right to left, then the guiding structure in Figure 2 can only be installed at the rightmost position of the packer 12, specifically: it must be set on the right side of the rubber cylinder, which is the basic technical content in this embodiment;

[0034] During the downhole process, the packer 12 is mainly guided by the guiding structure in Figure 2 . Specifically, when each dynamic guiding spring frame 7 contacts the inner wall of the wellbore, in the initial state, each dynamic guiding spring frame 7 maintains a curved and arched shape close to the inner wall of the wellbore. In this regard, it is first necessary to ensure that the maximum bending surface diameter of each dynamic guiding spring frame 7 is greater than the maximum diameter of the packer 12, so that the dynamic guiding spring frame 7 serves the purpose of contact guiding and centering.

[0035] Embodiment 2: The following supplementary description is made for the movement process of the dynamic part:

[0036] The two ends of the first ball head rod 8 are movably connected to the positions of the front retaining ring 4, the rear retaining ring 2 and the two ends of the dynamic guiding spring bracket 7. The first ball head rod 8 is arranged in a circular array along the center point position of the mounting joint sleeve 1. The inclination directions of the dynamic guiding spring brackets 7 in each group of adjacent dynamic parts are opposite, and the thread rotation directions of the front retaining ring 4 and the rear retaining ring 2 in the dynamic parts are opposite to that of the mounting joint sleeve 1. The mounting joint sleeves 1 are arranged in sequence along the setting direction of the dynamic parts, and each mounting joint sleeve 1 is connected by a long handle screw rod.

[0037] Scheme description: In essence, the front retaining ring 4 and the rear retaining ring 2 in the dynamic parts can actively change the bending degree of the dynamic guiding spring bracket 7. Refer to Figure 2 and Figure 5 As shown, there is a gap between the front retaining ring 4 and the rear retaining ring 2. Specifically, it is through the linear movement of the front retaining ring 4 and the rear retaining ring 2 on the mounting joint sleeve 1. For this, the following optimization methods are carried out for the dynamic parts:

[0038] Method 1: The front retaining ring 4 and the rear retaining ring 2 are threadedly connected to the mounting joint sleeve 1 so as to perform a spiral action. When performing the spiral action, it has the ability of linear movement but is not a direct sliding method. Taking Figure 4 as an example, each dynamic guiding spring bracket 7 is not arranged along the length direction of the parallel packer 12, but is inclined relative to the front retaining ring 4 and the rear retaining ring 2. Its purpose is mainly to cooperate with the spiral action of the front retaining ring 4 and the rear retaining ring 2. By restricting the thread directions of the front retaining ring 4 and the rear retaining ring 2 and the mounting joint sleeve 1, the spiral directions of the two are restricted to be completely opposite. If Figure 4 the front retaining ring 4 in rotates counterclockwise, then the rear retaining ring 2 rotates clockwise. In this state, the dynamic guiding spring bracket 7 is stretched by the front retaining ring 4 and the rear retaining ring 2, so its bending degree is reduced. However, if the front retaining ring 4 rotates clockwise and the rear retaining ring 2 rotates counterclockwise, then the dynamic guiding spring bracket 7 is compressed by the front retaining ring 4 and the rear retaining ring 2, resulting in an increase in its bending degree, and it is deduced in the reverse direction: In the initial state, the dynamic guiding spring bracket 7 will contact the wellbore environment. If the compression amount of the wellbore environment on the dynamic guiding spring bracket 7 is large, it will indirectly change the linear movement mode between the front retaining ring 4 and the rear retaining ring 2;

[0039] Method 2: During the installation of the overall guiding structure, the front retaining ring 4 and the rear retaining ring 2 are threadedly connected to the mounting joint sleeve 1 separately. For this, several mounting joint sleeves 1 need to be added according to the setting quantity of the front retaining ring 4 and the rear retaining ring 2, and they are directly installed through long handle screw rods, such as Figure 5As shown, the front ring 4 at the outermost position will not move to the left, and the rear ring 2 will not move to the right, thereby ensuring relative fixation. During the installation process, an intermediate kinetic energy ring 3 needs to be added between the dynamic parts. The intermediate kinetic energy ring 3 is mainly used to sense the linear movement of the front ring 4 and the rear ring 2.

[0040] Method 3: The tilting mode of the dynamic guide spring frame 7 in each dynamic part is set in a staggered manner. Figure 5 For example, each dynamic part is numbered from left to right. The dynamic guide spring frame 7 in the first dynamic part is tilted in the counterclockwise direction, and the dynamic guide spring frame 7 in the second dynamic part is tilted in the clockwise direction. Conversely, the dynamic guide spring frame 7 in the third dynamic part is tilted in the counterclockwise direction. The purpose of this arrangement is to better adapt to the shaft environment and change the bending change mode of each dynamic guide spring frame 7.

[0041] Embodiment 3: Based on Embodiment 2, a rear wing guide ring is provided to provide a supplementary description thereof:

[0042] The middle kinetic energy ring 3 is composed of a rubber ring and two kinetic energy contact sheets. The rubber ring is connected between the two kinetic energy contact sheets, and the kinetic energy contact sheets are respectively arranged on the outer wall positions corresponding to the front ferrule 4 and the rear ferrule 2. The oil pipeline 102 passes through the rubber ring and is connected to the inside of the rubber ring. The oil pipeline 102 is connected to the inside of the passive oil chamber 101.

[0043] A ball head rod 11 and a guide rod 9 are respectively arranged on the outer wall of the rear oil ring 6 along the downhole direction of the packer 12. The top end of the ball head rod 11 is movably connected with the rear wing guide ring 5. The ball head rod 11 is installed on the outer wall of the rear oil ring 6 along the direction parallel to the diameter of the rear oil ring 6. The guide rod 9 is slidably connected to the rear oil ring 6 along the direction parallel to the diameter of the rear oil ring 6. A pressure ring plate 10 is installed at the lower end of the guide rod 9 located in the passive oil chamber 101, and a wave strip corresponding to the rear wing guide ring 5 is installed at the top end of the guide rod 9.

[0044] Program Description: Figure 5 For example, each intermediate kinetic energy ring 3 is composed of a rubber ring and two kinetic energy contact pieces, and the kinetic energy contact pieces are in indirect contact with the front ring 4 and the rear ring 2. Each intermediate kinetic energy ring 3 is essentially in a fixed position with the mounting sleeve 1. In the initial state, the intermediate kinetic energy ring 3 is located exactly in the middle of two adjacent dynamic parts. When the front ring 4 or the rear ring 2 moves linearly, it will directly contact the kinetic energy contact piece, thereby compressing the volume inside the rubber ring. For this, the following process is set in conjunction with the rear oil ring 6:

[0045] Process 1: First, it is necessary to ensure that the setting of the rear oil ring 6 is further back than the dynamic part, so that the rear wing guide ring 5 on the rear oil ring 6 can be used as the subsequent auxiliary guiding structure of the overall guiding structure. In this regard, in the initial state, hydraulic oil needs to be injected into the passive oil chamber 101 and further injected into each intermediate kinetic energy ring 3 along the oil pipeline 102, so that the rubber rings in each intermediate kinetic energy ring 3 are fully expanded, and the distances between the two kinetic energy contact pieces and the front position ferrule 4 and the rear position ferrule 2 are exactly equal, and the rear wing guide ring 5 does not contact the wellbore prior to the dynamic guide spring frame 7;

[0046] Process 2: In conjunction with the specific description in Embodiment 2: When the dynamic guide spring frame 7 in the dynamic part at a certain position is bent and changed, it mainly forms a linear movement mode of the front position ferrule 4 and the rear position ferrule 2, thus contacting the kinetic energy contact piece and compressing the rubber ring to distribute the hydraulic oil inside to the intermediate kinetic energy ring 3, or directly distributing it to the passive oil chamber 101. In this process, referring to Figure 6 , when part of the hydraulic oil is distributed to the passive oil chamber 101, it will generate an outward thrust on the pressure-receiving ring plate 10 at a certain position, causing the rear wing guide ring 5 to rotate counterclockwise along the top of the spherical head rod II 11, and replacing the dynamic guide spring frame 7 at a certain position to contact the inner wall of the wellbore;

[0047] Process 3: In combination with Process 2, the spiral modes in each dynamic part are different. If the front position ferrule 4 and the rear position ferrule 2 in a certain dynamic part undergo linear movement, it will also indirectly affect the dynamic parts in adjacent positions. Specifically, it is through the direct sliding action of the kinetic energy contact piece due to hydraulic changes. It can be directly understood that when the dynamic guide spring frame 7 in a certain dynamic part is bent and changed due to the wellbore environment, it will "manage" multiple dynamic parts and the rear wing guide ring 5 in a coordinated manner. The overall solution is to relieve the action stability of the overall guiding structure in real time through the coordinated management method. On the basis of playing a role in straightening and guiding, it avoids multiple unpredictable swings of the overall packer 12 due to the deformation process of the dynamic guide spring frame.

[0048] In summary, based on the packer applied in the cementing engineering, an externally mounted guiding structure is added for the downhole direction of the packer during the operation process. Its essence is composed of multiple dynamic components. Each dynamic component consists of a front-position ferrule, a rear-position ferrule, and a dynamic guiding spring frame between the two. When performing straightening and guiding, the front-position ferrule and the rear-position ferrule have small-amplitude spiral movements, and the spiral directions of the two are opposite. The purpose is to transfer the possible stress changes to the dynamic guiding spring frame first through the dynamic switching process when changing the bending degree of the dynamic guiding spring frame in cooperation with the wellbore environment, and convert the stress changes into hydraulic changes through the stress relief method of the intermediate kinetic energy ring structure, and change the rear-wing guiding ring to assist in guiding. Mainly, on the basis of achieving the guiding purpose, the guiding stability is improved through the guiding process from multiple angles.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor limit the present invention to the specific implementation manners described. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A spiral flow - type guiding structure applied in the cementing engineering, which is used in a packer for the cementing engineering, is characterized in that, The spiral flow - type guiding structure is installed at one end of the packer, and includes an installation joint sleeve, a front - position collar, a rear - position collar, a dynamic guiding spring frame, and a rear - position oil ring; The front - position collar and the rear - position collar are thread - connected to the installation joint sleeve, and ball - head rods I are arranged on the outer walls of the front - position collar and the rear - position collar. The dynamic guiding spring frame is arranged on the ball - head rods I on the front - position collar and the rear - position collar. The front - position collar and the rear - position collar in adjacent positions form a dynamic part, and an intermediate kinetic energy ring is arranged between each pair of adjacent dynamic parts; The rear - position oil ring is installed on the outer wall at one end of the installation joint sleeve. A passive oil cavity is opened in the installation joint sleeve at the internal position corresponding to the rear - position oil ring. An oil pipeline is connected between the inside of the intermediate kinetic energy ring and the passive oil cavity; The setting direction of the spiral flow - type guiding structure corresponds to the down - hole direction of the packer, and the spiral flow - type guiding structure is arranged in the opposite direction of the down - hole direction in the slip structure of the packer. The dynamic guiding spring frame is arched along the direction deviating from the outer wall of the installation joint sleeve, and the dynamic guiding spring frame is inclined along the length direction of the installation joint sleeve in the dynamic part. The inclination directions of the dynamic guiding spring frames in each pair of adjacent dynamic parts are opposite, and the thread rotation directions of the front - position collar and the rear - position collar in the dynamic part are opposite to that of the installation joint sleeve. The installation joint sleeves are arranged in sequence along the setting direction of the dynamic part, and each installation joint sleeve is connected by a long - handle screw rod. The intermediate kinetic energy ring is composed of a rubber ring and two kinetic - energy contact pieces. The rubber ring is connected between the two kinetic - energy contact pieces, and the kinetic - energy contact pieces are respectively arranged at the outer wall positions corresponding to the front - position collar and the rear - position collar. The oil pipeline penetrates through the rubber ring and is communicated with the inside of the rubber ring.

2. The spiral flow direction guiding structure applied to the cementing engineering according to claim 1, characterized in that Both ends of the ball - head rod I are movably connected to the front - position collar, the rear - position collar, and both ends of the dynamic guiding spring frame, and the ball - head rod I is arranged in a circular array along the center point position of the installation joint sleeve.

3. The spiral flow directional structure applied to the cementing engineering according to claim 1, characterized in that, The oil pipeline is communicated with the inside of the passive oil cavity. Ball - head rod II and a guiding rod are respectively arranged on the outer wall of the rear - position oil ring along the down - hole direction of the packer. The top end of the ball - head rod II is movably connected to a rear - wing guiding ring.

4. The spiral flow direction type guiding structure applied to the cementing engineering according to claim 3, characterized in that, The ball - head rod II is installed on the outer wall of the rear - position oil ring along the direction parallel to the diameter of the rear - position oil ring. The guiding rod is slidably connected to the rear - position oil ring along the direction parallel to the diameter of the rear - position oil ring. A pressure - receiving ring plate is installed at the lower end position of the guiding rod in the passive oil cavity, and a corrugated strip corresponding to the rear - wing guiding ring is installed at the top end position of the guiding rod.

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