An integrated deflector and a separation method thereof

Abstract

The present invention relates to the technical field of petroleum branch well drilling, and proposes an integrated deflector, including a sealing body, a deflector, which is arranged on the sealing body and has a guide bevel, a window milling cone, which is located on one side of the guide bevel, and a screw, which connects the deflector and the window milling cone, wherein the guide bevel and the window milling cone have a slot formed on one and a protrusion formed on the other, and the protrusion is used to be inserted into the slot. The above technical solution solves the technical problem in the related art that the integrated deflector cannot be smoothly lowered into the well and the screws cannot be conveniently cut off during the process of lowering and sealing the well.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum branch well drilling, and in particular to an integrated deflector. Background Art

[0002] Directional well and horizontal well technology has been increasingly improved. However, due to the limitation of ground well network, it is impossible to deploy more adjustment wells. Branch wells, as an extension and development of directional well technology, can effectively reuse the old well casing for window side drilling, and are becoming more and more important. The guide is also called the bevel. It is used for guiding the window milling cone when the old well casing is used for window side drilling. It is a key tool for branch well drilling technology and plays a vital role in the drilling and completion of branch wells.

[0003] Depending on whether the bevel guide is connected to the milling cone window milling cone, the bevel guide is divided into an integrated bevel guide and a split bevel guide. Figure 1 , Figure 2 As shown, it is an integrated deflector. In this related technology, the deflector and the window milling cone are connected by several screws. As for the connection form of screws, due to the complex actual situation underground, the shear strength of the screws during the process of going down the well is very difficult to control. The problem is that when the screws are designed to be high-strength, that is, they can withstand large shear forces, it is not easy to cut the screws after sealing, and it is difficult to separate the deflector and the window milling cone; when the screws are designed to be strong, that is, they can withstand small shear forces, they encounter resistance during the process of going down the well or generate additional bending moments due to large well inclination, causing the screws to break prematurely, that is, the phenomenon of "losing hands" prematurely occurs. Therefore, it is impossible to ensure that the integrated deflector can be safely lowered into the well, reliably sealed, and the window milling cone can be smoothly separated. This problem has become a technical problem that plagues underground operations. Summary of the invention

[0004] The present invention provides an integrated deflector, which solves the technical problem in the related art that the integrated deflector cannot be smoothly lowered into the well and the screws cannot be conveniently cut off during the process of lowering the deflector into the well and sealing it.

[0005] The technical solution of the present invention is as follows:

[0006] An integrated deflector comprises:

[0007] Seat body,

[0008] The guide bevel body is arranged on the seat sealing body and has a guide bevel surface.

[0009] The window milling cone is located on one side of the guide bevel.

[0010] Screws, connecting the guide bevel and the window milling cone,

[0011] Among them, the guide bevel and the window milling cone have a slot formed on one and a protrusion formed on the other, and the protrusion is used to be inserted into the slot.

[0012] As a further technical solution, one of the protrusion and the groove is an internal thread and the other is an external thread.

[0013] As a further technical solution, the central axis of the internal thread and the central axis of the external thread are both coaxial with the central axis of the window milling cone, and an open sleeve is formed at one end of the guide bevel away from the seat seal body.

[0014] The internal thread is formed on the opening sleeve, and the external thread is formed on the window milling cone.

[0015] As a further technical solution, the protrusions are arc-shaped protrusions, and there are several of them arranged in sequence, and the slots are arc-shaped slots, and there are several of them arranged in sequence.

[0016] As a further technical solution, a matching cylindrical surface is formed on the window milling cone, the external thread is located beside the matching cylindrical surface, and after the internal thread is connected to the external thread, the matching cylindrical surface fits with the open sleeve.

[0017] As a further technical solution, the window milling cone includes a front end window milling cone portion, a reducing portion, and a rear end window milling cone portion which are connected in sequence, the external thread is arranged on the outer wall of the reducing portion, and the maximum diameter of the front end window milling cone portion is greater than the outer diameter of the external thread, and the maximum diameter of the rear end window milling cone portion is greater than the maximum diameter of the front end window milling cone portion.

[0018] As a further technical solution, the opening sleeve is arc-shaped and surrounds more than half of the reduced diameter portion of the window opening milling cone.

[0019] As a further technical solution, the external thread is a full-circle thread, the internal thread is a thread greater than a half-circle thread, the open sleeve is semicircular, and has extended edges at both ends.

[0020] As a further technical solution, the guide bevel has a guide bevel cavity.

[0021] It also includes a central tube, which is arranged on the guide bevel body and extends into the cavity of the guide bevel body.

[0022] The window milling cone has a window milling cone cavity, and the window milling cone cavity has a connecting port. One end of the center tube extends into the connecting port and communicates with the window milling cone cavity. The center tube is slidably arranged relative to the connecting port.

[0023] The present invention also provides an integrated deflector separation method, comprising the following steps:

[0024] S1. The sealing body is sealed in the wellbore.

[0025] S2, after the window milling cone rotates, the screw is cut off,

[0026] S3, the window milling cone continues to rotate, and the protrusion rotates out of the slot.

[0027] S4, the window milling cone is lifted up, and the window milling cone is separated from the center tube,

[0028] S5, establishing a drilling fluid circulation in the window milling cone,

[0029] S6, the window milling cone is lifted and rotated, and a part of the protrusion on the guide bevel is ground off.

[0030] S7, the window opening milling cone descends and rotates, and the protrusion on the guide bevel continues to be ground a portion, so that the entire window opening milling cone can pass through the protrusion, thereby realizing the separation of the window opening milling cone and the guide bevel body.

[0031] The working principle and beneficial effects of the present invention are:

[0032] In the present embodiment, in order to achieve the technical problem of the integrated deflector in the related art being lowered into the well and sealed while ensuring that it can be lowered into the well smoothly and the screws can be conveniently cut, the inventor has specially designed an integrated deflector, wherein a slot and a protrusion are designed on the guide bevel surface and the window milling cone, one is designed with a slot and the other is designed with a protrusion. Since the two are connected by radial insertion from the window milling cone or circumferential rotation, they cannot limit the movement and separation of the two in the radial direction or the rotation and separation around the axial direction, but only limit the relative movement of the two in the axial direction of the window milling cone. The cooperation of the slot and the protrusion allows the screws to be designed with a structure and size that is more convenient to cut, and the design is thinner, and the number can also be reduced. Even if copper screws that are easier to cut are used instead of steel screws, it can be ensured that they will not be lost prematurely. Therefore, the problem of difficult screw cutting is effectively solved. The screws are used together with the slot and the protrusion to avoid shaking of one of the deflector and the window milling cone relative to the other during operation, thereby avoiding the screws being cut off prematurely and thus lost prematurely. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Figure 1 It is a schematic diagram of the structure of an integrated whipstock in the prior art;

[0035] Figure 2 for Figure 1 Middle A is a partial enlarged view;

[0036] Figure 3 It is a schematic diagram of the structure of the integrated whipstock in the present invention;

[0037] Figure 4 for Figure 3 Middle B is a partial enlarged view;

[0038] Figure 5 It is a structural schematic diagram of an implementation method of a window milling cone in the present invention;

[0039] Figure 6 It is a structural schematic diagram of another implementation method of the window milling cone in the present invention;

[0040] In the figure: 1-seat sealing body, 2-guide bevel body, 201-guide bevel surface, 202-slot, 203-opening sleeve, 204-extended edge, 3-window milling cone, 301-protrusion, 302-matching cylindrical surface, 303-front end window milling cone part, 304-rear end window milling cone part, 305-reducing part, 4-screw, 5-internal thread, 6-external thread, 8-guide bevel body cavity, 9-center tube, 10-window milling cone cavity, 11-connecting port. DETAILED DESCRIPTION

[0041] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1-2 As shown, it is an integrated deflector in the related art. The integrated deflector used for branch well drilling in the related art is usually connected by several screws 4. The problems existing in this method have been recorded in detail in the background technology. In short, the screws 4 are designed to be thicker and stronger or thinner and weaker, which will have their own problems. The screws 4 may be inconvenient to cut, or they may be easily lost in advance and unable to be sealed. For this reason, the inventor has made the following improvements to the technical solution.

[0043] Example 1

[0044] like Figure 3 to Figure 5 As shown, this embodiment provides an integrated deflector, including:

[0045] Seat body 1,

[0046] The guide bevel body 2 is arranged on the seat sealing body 1 and has a guide bevel surface 201.

[0047] The window milling cone 3 is located on one side of the guide bevel 201.

[0048] Screw 4, connects the bevel guide 2 and the window milling cone 3,

[0049] Among them, the guide bevel 201 and the window milling cone 3 have a slot 202 formed on one and a protrusion 301 formed on the other, and the protrusion 301 is used to be inserted into the slot 202.

[0050] In this embodiment, in order to make it easier to cut off the screw 4 and avoid the problem of premature loss, the inventor specially designed an integrated deflector, in which a groove 202 and a protrusion 301 are designed on the guide bevel 201 and the window milling cone 3, one is designed with a groove 202 and the other is designed with a protrusion 301. Since the two are connected by radial insertion from the window milling cone 3 or circumferential rotation, they cannot limit the movement and separation of the two in the radial direction or the rotation and separation around the axial direction, and only limit the relative movement of the two in the axial direction of the window milling cone 3. The movement, cooperation of the slot 202 and the protrusion 301 allows the screw 4 to be designed with a structure and size that is more convenient to cut, and the design can be thinner. At the same time, the number can be reduced, and even if copper screws that are easier to cut are used instead of steel screws, it can be guaranteed that they will not be lost prematurely. Therefore, the problem of the difficulty in cutting the screw 4 is effectively solved. The screw 4 is used together with the slot 202 and the protrusion 301 to avoid shaking of one of the guide bevel 2 and the window milling cone 3 relative to the other during work, thereby preventing the screw 4 from being cut off prematurely and thus lost prematurely.

[0051] Among them, when the whole is lowered into the well to the predetermined position and the sealing body 1 is sealed, the window milling cone 3 is driven by the drill pipe to cut off the screw 4. As for the separation between the slot 202 and the protrusion 301, on the one hand, the separation can be achieved by axial rotation, and on the other hand, the separation can be achieved by radial relative movement of the window milling cone 3 and the bevel guide 2. In short, the slot 202 and the protrusion 301 are designed not to limit the relative rotation of the window milling cone 3 and the bevel guide 2, so as to ensure that the screw 4 can be cut off by the relative rotation of the window milling cone 3 and the bevel guide 2. After that, the slot 202 and the protrusion 301 can be separated again.

[0052] Example 2

[0053] like Figure 3 , Figure 4 , Figure 6 As shown, on the basis of Example 1, the protrusion 301 and the groove 202 are designed to be an internal thread 5 and an external thread 6, that is, the internal thread 5 and the external thread 6 are a more specific way of the protrusion 301 and the groove 202, because the thread itself is a more special groove and protrusion.

[0054] In this embodiment, the inventor specifically designed the guide bevel 201 and the window milling cone 3 to be connected by the internal thread 5 and the external thread 6. The multiple turns of thread can withstand a larger axial force, making the axial fixing structure more stable, and can well ensure that the window milling cone 3 and the guide bevel 2 are more convenient to separate, and the screw 4 cutting process can also be very smooth, ensuring that the screw 4 is easy to cut off after the seat is sealed. Specifically, when the window milling cone 3 and the guide bevel 201 need to be separated, it is only necessary to rotate the window milling cone 3 to cut off the screw 4, and then continue to rotate the required number of turns to make it turn out from the threaded connection, thereby realizing the separation and separation of the two. Compared with the more basic protrusion 301 and the slot 202 method in Example 1, not only is the connection more stable, but the separation is also very convenient, which can better avoid premature loss and meet the convenience of separation at the same time.

[0055] The central axis of the inner thread 5 and the central axis of the outer thread 6 can be designed to be coaxial with the central axis of the window milling cone 3, so as to better ensure that the window milling cone 3 can be rotated to separate from the thread of the bevel guide 2. The direction of the thread can be designed as required to separate the window milling cone 3 from the bevel guide 2.

[0056] Example 3

[0057] like Figure 5 As shown, on the basis of Example 1, the protrusions 301 are designed to be arc-shaped protrusions 301, and there are several of them arranged in sequence, and the slots 202 are arc-shaped slots 202, and there are several of them arranged in sequence.

[0058] In this embodiment, the guide bevel 201 and the window milling cone 3 have a slot 202 formed on one and a protrusion 301 formed on the other. The protrusion 301 is used to snap into the slot 202. The purpose of this design is to limit the relative displacement between the guide bevel 201 and the window milling cone 3 along the axial direction, so as to avoid the screw 4 from being cut off in advance. In this embodiment, the protrusion 301 can be designed as an arc-shaped protrusion 301, and the slot 202 can be designed as an arc-shaped slot 202. On the one hand, the relative displacement between the guide bevel 201 and the window milling cone 3 can be well limited in the axial direction. On the other hand, the arc-shaped protrusion 301 can be rotated out of the arc-shaped slot 202 by rotating the window milling cone 3, thereby greatly improving the convenience of separation, and can well ensure the stability of the integrated guide bevel during the process below, and avoid premature loss. The arc-shaped protrusion 301 and the arc-shaped slot 202 can be designed to be half a circle or shorter, as long as they can be separated after rotation.

[0059] Example 4

[0060] like Figure 3-4 , Figure 6As shown, on the basis of Example 2, further, an open sleeve 203 is formed at one end of the guide bevel 201 away from the seat sealing body 1, an internal thread 5 is formed on the open sleeve 203, and there are several screws 4, one of which passes through the open sleeve 203 and is connected to the window milling cone 3, and an external thread 6 is formed on the window milling cone 3.

[0061] In this embodiment, in order to further ensure the relative stability between the guide bevel 2 and the window milling cone 3 and avoid shaking that causes the screw 4 to be cut off prematurely, the inventor specially designed an open sleeve 203 to form an internal thread 5 to connect with the external thread 6 on the rod body of the window milling cone 3. Therefore, the open sleeve 203 can also play a good role in supporting the window milling cone 3.

[0062] Furthermore, a matching cylindrical surface 302 is formed on the window milling cone 3 , and the external thread 6 is located on the matching cylindrical surface 302 . After the internal thread 5 is connected to the external thread 6 , the matching cylindrical surface 302 fits with the open sleeve 203 .

[0063] In this embodiment, in order to realize the simultaneous use of the thread and the screw 4 and to limit the shaking between the bevel guide 2 and the window milling cone 3, a matching cylindrical surface 302 is specially designed, which is an annular convex edge. After the internal thread 5 and the internal thread 5 are connected, the matching cylindrical surface 302 can fit with the open sleeve 203. The supporting effect of the connection between the internal and external threads 6 and the supporting effect of the matching cylindrical surface 302 cooperate with each other, so that the connection between the bevel guide 2 and the window milling cone 3 is more stable.

[0064] Further, the window milling cone 3 includes a front window milling cone portion 303, a reducing portion 305, and a rear window milling cone portion 304 connected in sequence, the external thread 6 is arranged on the outer wall of the reducing portion 305, and the maximum diameter of the front window milling cone portion 303 is greater than the outer diameter of the external thread 6, and the maximum diameter of the rear window milling cone portion 304 is greater than the maximum diameter of the front window milling cone portion 303.

[0065] The opening sleeve 203 is arc-shaped and surrounds more than half of the reduced diameter portion 305 of the window milling cone 3 .

[0066] In this embodiment, in order to further improve the stability and reliability of the integrated deflector during the downward delivery process, a further structure is added to improve it, so that even if the seat sealing body 1 has not reached the predetermined target, if the screw 4 of the first line of defense is cut off in advance, if the protrusion 301 of the second line of defense is disengaged from the slot 202 in advance, there is still a third line of defense to ensure that the deflector 2 and the window milling cone 3 will not be completely separated; the specific third line of defense can be designed as the window milling cone 3 includes a front end window milling cone portion 303, a reducing portion 304 connected in sequence, and a plurality of other parts. 305, the rear end window milling cone portion 304, and the opening sleeve 203 is designed to be arc-shaped, so as to form a semi-enclosed structure, surrounding half of the reducing portion 305, so that even if there are problems with the first two lines of defense, the front end window milling cone portion 303 can still be stuck on the arc-shaped opening sleeve 203, so that the guide bevel body 2 is hung on the front end window milling cone portion 303 through the arc-shaped opening sleeve 203, so that the guide bevel body 2 will not separate from the window milling cone 3 and fall to the bottom of the well. Serious accidents will not occur, which greatly improves the stability and safety of the operation.

[0067] It should be noted that, although three lines of defense are required as the connection between the sealing body 1 and the window milling cone 3 during the lowering process of the integrated incline guide, after the sealing body 1 is sealed, the connections of these three lines of defense need to be completely removed, and the specific process of removing the connections of the first two lines of defense is as follows: after the sealing body 1 is sealed in the wellbore, the window milling cone 3 is rotated so that the screw 4 passing through the opening sleeve 203 and connected to the window milling cone 3 is cut off, thereby removing the connection of the first line of defense, and continuing to rotate the window milling cone 3 for several turns so that the external thread 6 is disengaged from the internal thread 5, thereby removing the connection of the second line of defense.

[0068] As described in detail above, after removing the first line of defense connection of the screw 4 and the second line of defense connection of the external thread 6 and the internal thread 5, the front end window milling cone 303 can still be stuck on the arc-shaped opening sleeve 203, and the guide bevel 2 will be hung on the front end window milling cone 303 through the arc-shaped opening sleeve 203. Therefore, it is necessary to destroy the arc-shaped opening sleeve 203 with the internal thread 5 so that the opening sleeve 203 of the semi-enclosed structure will not affect the movement of the window milling cone 3, especially will not affect the rear The specific destruction process can be to destroy the opening sleeve 203 starting from the internal thread 5 on the inner wall, until it can be passed by the rear end window milling cone 304 and then proceed along the guide slope 201. Since the rear end window milling cone 304, which is the main working part of the window milling cone 3, is usually larger in diameter, much larger than the internal thread 5, it is difficult to directly destroy it through the rear end window milling cone 304, but it affects the movement of the rear end window milling cone 304.

[0069] For this purpose, a front end window milling cone 303 is specially designed, which, together with the rear end window milling cone 304 and the connecting portion 305, are all cylindrical structures, and the front end window milling cone 303 is designed to be larger than the diameter of the connecting portion 305, and smaller than the diameter of the rear end window milling cone 304; on the one hand, the front end window milling cone 303 can be used to hang the opening sleeve 203 of the semi-enclosed structure on the front end window milling cone 303 to prevent the guide bevel 2 from falling into the bottom of the well; on the other hand, the front end window milling cone 303 can also be used to lift and rotate the opening sleeve 203 of the semi-enclosed structure to start grinding and destroying it from the internal thread 5 thereon, so that the opening sleeve 203 of the semi-enclosed structure can be opened. The inner diameter of the mouth sleeve 203 is closer to the diameter of the rear end window milling cone 304; therefore, in the next step, the rear end window milling cone 304 can be moved downward and rotated to further grind and damage the inner wall of the opening sleeve 203, so that the rear end window milling cone 304 can move downward and pass through the semi-enclosed structure of the opening sleeve 203 to achieve the destruction of the third line of defense connection, and then move along the guide bevel 201 to carry out subsequent window opening side drilling operations; therefore, the overall connection of the three lines of defense required in the downward delivery process and the disconnection of the three lines of defense required after sealing are well realized, thereby ensuring the stability and feasibility of the overall operation.

[0070] Furthermore, the external thread 6 is a full-circle thread, the internal thread 5 is a thread greater than a half-circle, the open sleeve 203 is semicircular, and has extended edges 204 at both ends.

[0071] In this embodiment, in order to ensure that after the sealing of the sealing body 1 is completed at the designated position, the window milling cone 3 can be more efficiently separated from the guide bevel 2, the internal thread 5 can be specially designed as a half thread, so as to ensure that after the screw 4 is cut off, the external thread 6 and the internal thread 5 can be well separated, ensuring the subsequent window side drilling, and the structure of the opening sleeve 203 is a semicircular arc, and the two ends of the opening sleeve 203 also have extended edges 204, which makes it more convenient for the window milling cone 3 to enter, and ensures that the front end window milling cone 303 can be better hung on the opening sleeve 203 and the extended edges 204 on both sides thereof when necessary, which greatly improves the construction stability. It should be noted that at least half a circle of thread can not only be half of the full circle of thread or slightly larger, but also two-thirds or three-fifths of the full circle of thread. Threads of different proportions can meet the selection and application under various connection strength requirements. Further, there are several screws 4, one of which passes through the opening sleeve 203 and the matching cylindrical surface 302 to achieve a better connection effect.

[0072] In this embodiment, in order to prevent the loosening of the thread caused by vibration of the integrated deflector during the process of going down into the well, a screw 4 is specially designed to be installed on the open sleeve 203 of the deflector guide body 2 and the external thread 6 of the window milling cone 3, or to be installed on the opening sleeve 203 of the deflector guide body 2 and the matching cylindrical surface 302 of the window milling cone 3, which is used to clamp and fix the deflector guide body 2 and the window milling cone 3 to make the structure more stable.

[0073] Furthermore, the guide bevel 2 has a guide bevel cavity 8.

[0074] It also includes a central tube 9, which is arranged on the guide bevel 2 and extends into the guide bevel cavity 8.

[0075] The window milling cone 3 has a window milling cone cavity 10 , and the window milling cone cavity 10 has a connecting port 11 . One end of the center tube 9 extends into the connecting port 11 to communicate with the window milling cone cavity 10 , and the center tube 9 is slidably arranged relative to the connecting port 11 .

[0076] The guide inclination body cavity 8 is usually a central through hole along its axial direction, which is used to transport the drilling fluid to the seat seal body 1 to provide the liquid pressure required for the seat seal. The window milling cone cavity 10 is also usually a central through hole along its axial direction, which is used to enable the drilling fluid circulation to be smoothly established during the drilling process. This is a prior art and will not be omitted here for detailed explanation.

[0077] In this embodiment, the bevel guide body 2 has a bevel guide body cavity 8, the window milling cone 3 has a window milling cone cavity 10 and a connecting port 11, one end of the center tube 9 is fixedly arranged on the bevel guide body 2 and extends into the bevel guide body cavity 8, the other end of the center tube 9 extends into the connecting port 11 and is connected with the window milling cone cavity 10, and this end can slide relative to the window milling cone 3, the window milling cone 3 can be completely pulled out from the center tube 9, when the window milling cone 3 is pulled upward, the window milling cone cavity 10 slides to be separated from the center tube 9, so that the window milling cone cavity 10 and the center tube are separated by a certain distance, and the drilling fluid flows out from the gap into the wellbore annulus, thereby establishing a drilling fluid circulation, so that the subsequent required front end window milling cone part 303 can be lifted up to grind and damage the internal thread 5, avoiding grinding when the drilling fluid circulation is not established and causing serious engineering accidents.

[0078] Example 5

[0079] This embodiment provides an integrated deflector separation method, comprising the following steps:

[0080] S1. The sealing body 1 is sealed in the wellbore. There is a protrusion 301 on the guide slope 201. There is a slot 202 on the window milling cone 3. The protrusion 301 is stuck in the slot 202.

[0081] S2, after the window milling cone 3 is rotated, the screw 4 is cut off.

[0082] S3, the window milling cone 3 continues to rotate, and the protrusion 301 rotates out of the slot 202.

[0083] S4, the window milling cone 3 is lifted up, and the window milling cone 3 is separated from the center tube 9.

[0084] S5. Establish drilling fluid circulation,

[0085] S6, the window milling cone 3 is lifted and rotated to the guide bevel 201, the protrusion 301 on the guide bevel 201 is ground, and the protrusion 301 or the groove 202 on the guide bevel 201 is ground.

[0086] S7, the window milling cone 3 descends and rotates onto the guide bevel 201, and a portion of the protrusion 301 or the slot 202 continues to be ground, so that the entire window milling cone 3 can pass through the protrusion 301 or the slot 202, thereby realizing the separation of the window milling cone 3 and the bevel guide.

[0087] In this embodiment, in order to enable the window milling cone 3 to smoothly disengage along the guide bevel surface 201 after the guide is sealed to drill the branch well, the sealing body 1 completes the sealing at the designated position in the wellbore, and the window milling cone 3 needs to be operated to rotate to cut off the screw 4, and the protrusion 301 is rotated out of the groove. When the protrusion 301 and the slot 202 are respectively the external thread 6 and the internal thread 5, and the thread is matched, the way in which the window milling cone 3 rises can be that the window milling cone 3 rotates along the thread rotation direction to drive the window milling cone 3 to rise, and the screw 4 is first cut off during rotation, and the window milling cone 3 continues to rotate and rise along the thread until the external thread 6 and the internal thread 5 are separated; when the protrusion 301 and the slot 202 are respectively the external thread 6 and the internal thread 5, and the thread is fine enough, after the window milling cone 3 rotates to cut off the screw 4, it only needs to be simply rotated or lifted up without rotation to make the thread connection disengaged.

[0088] Afterwards, the external thread 6 and the internal thread 5 may need to be destroyed because they will affect the movement of the window milling cone 3. First, the drilling fluid circulation needs to be established, and the window milling cone 3 is further lifted up. The window milling cone cavity 10 on the window milling cone 3 is separated from the center tube 9. The window milling cone 3 is rotated and lifted up. The front window milling cone part 303 grinds a part of the internal thread 5 on the guide bevel 201 to expand it. Then the window milling cone 3 is rotated and lowered, and the rear window milling cone part 3041 continues to grind a part of the guide bevel 201, so that the entire window milling cone 3 can pass through the semicircular opening sleeve 203, thereby realizing the separation of the window milling cone 3 and the guide bevel. This ensures the stability of the entire integrated guide bevel delivery process, and can also well realize the separation of the guide bevel body 2 and the window milling cone 3.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated deflector, It is characterized in that include, Sealing body (1), The guide bevel body (2) is arranged on the seat sealing body (1) and has a guide bevel surface (201). The window milling cone (3) is located on one side of the guide bevel (201). A screw (4) connects the guide bevel (2) and the window milling cone (3). The guide bevel (201) and the window milling cone (3) are provided with a slot (202) on one and a protrusion (301) on the other, and the protrusion (301) is used to be inserted into the slot (202); the protrusion (301) and the slot (202) are provided with an internal thread (5) and an external thread (6) on one and the other; The central axis of the internal thread (5) and the central axis of the external thread (6) are both coaxial with the central axis of the window milling cone (3); an open sleeve (203) is formed at one end of the guide bevel (201) away from the seat sealing body (1); the internal thread (5) is formed on the open sleeve (203), and the external thread (6) is formed on the window milling cone (3); The window milling cone (3) comprises a front window milling cone portion (303), a reducing portion (305), and a rear window milling cone portion (304) which are connected in sequence, the external thread (6) is arranged on the outer wall of the reducing portion (305), and the maximum diameter of the front window milling cone portion (303) is greater than the outer diameter of the external thread (6), and the maximum diameter of the rear window milling cone portion (304) is greater than the maximum diameter of the front window milling cone portion (303).

2. The integrated deflector according to claim 1, It is characterized in that A matching cylindrical surface (302) is formed on the window milling cone (3), the external thread (6) is located next to the matching cylindrical surface (302), and after the internal thread (5) is connected to the external thread (6), the matching cylindrical surface (302) fits with the open sleeve (203).

3. The integrated deflector according to claim 1, It is characterized in that in, The opening sleeve (203) is arc-shaped and surrounds more than half of the reduced diameter portion (305) of the window opening milling cone (3).

4. The integrated deflector according to claim 1, It is characterized in that The external thread (6) is a full-circle thread, the internal thread (5) is a thread greater than a half-circle thread, and the open sleeve (203) is semicircular and has extended edges (204) at both ends.

5. The integrated deflector according to claim 1, It is characterized in that The bevel guide body (2) has a bevel guide body cavity (8), and also includes a center tube (9), which is arranged on the bevel guide body (2) and extends into the bevel guide body cavity (8); the window milling cone (3) has a window milling cone cavity (10), and the window milling cone cavity (10) has a connecting port (11); one end of the center tube (9) extends into the connecting port (11) and communicates with the window milling cone cavity (10); the center tube (9) is slidably arranged relative to the connecting port (11).

6. A method for separating an integrated deflector, using the integrated deflector according to any one of claims 1 to 5, It is characterized in that The following steps are included: S1. The sealing body (1) is sealed in the wellbore. S2, after the window milling cone (3) is rotated, the screw (4) is cut off, S3, the window milling cone (3) continues to rotate, and the protrusion (301) rotates out of the slot (202). S4, the window opening milling cone (3) is lifted up, and the window opening milling cone (3) is separated from the central tube (9). S5, in the window milling cone (3), establish a drilling fluid circulation, S6, the window milling cone (3) is lifted and rotated, and a portion of the protrusion (301) on the guide bevel (201) is ground off. S7, the window opening milling cone (3) descends and rotates, and the protrusion (301) on the guide bevel (201) continues to be ground partially, so that the entire window opening milling cone (3) can pass through the protrusion (301), thereby realizing the separation of the window opening milling cone (3) and the guide bevel body (2).

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