A sidetracking and isolation integrated assembly tool

Abstract

The utility model relates to a kind of side drilling packer integrated combination tools, including oblique mechanism, anchoring mechanism and adjusting mechanism;Oblique mechanism, anchoring mechanism and adjusting mechanism are sequentially connected fixed thread by thread to constitute integrated combination tool, and oblique mechanism free end is connected with the running-in drilling tool, and adjusting mechanism is connected with packer;Anchoring mechanism includes piston B and cat claw structure;Anchoring mechanism is respectively provided with piston B towards the left and right sides of well inner side wall, and the end of two side pistons B is provided with cat claw structure, drives two side pistons B to extend so that cat claw structure is radially clamped well inner side wall;Up and down movable upper sub is nested in lower sub, and there is guiding assembly between upper and lower sub, and the cooperation of guiding assembly makes when pulling upper sub, lower sub is circumferentially rotated under fixed working condition, so that oblique mechanism is adjusted to required azimuth angle.The utility model reaches the beneficial effect: reduce construction risk, improve construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling tool technology, and in particular to an integrated side-drilling and packing tool. Background Technology

[0002] Currently, in the process of oil drilling operations, existing wells may require backfilling and sidetracking due to special circumstances. Sidetracking in oil drilling engineering refers to drilling a new well by opening a new window in the existing well. The main purpose of window sidetracking is to revive old wells, handle complex accidents, or meet geological requirements, thereby reducing costs.

[0003] Traditional sidetracking requires lowering the drill string to the designated location, injecting cement, drilling a cement plug, and finally lowering the directional drill string to complete the sidetracking process. This involves multiple tool retrievals and insertions, numerous steps, and is extremely time-consuming (in addition, existing directional drilling tools are immature and imperfect, and are rarely used in the field), making it difficult to guarantee the quality and safety of the operation, resulting in low efficiency.

[0004] Therefore, based on this, the inventors made further designs to overcome the aforementioned problems, taking into account the existing defects and shortcomings. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a side-drilling and sealing integrated tool that reduces construction risks, improves construction efficiency, avoids anchoring errors, and completes the operation in one go.

[0006] The purpose of this utility model is achieved through the following technical solution: a side-drilling and packer integrated tool, characterized in that it includes an inclined mechanism, an anchoring mechanism, an adjustment mechanism, and a packer;

[0007] The inclined mechanism, anchoring mechanism, and adjusting mechanism are sequentially threaded together to form a combined tool. The free end of the inclined mechanism is connected to the feed drill string, and the adjusting mechanism is connected to a packer. The combined tool is then fed into the wellbore to a predetermined position via the feed drill string.

[0008] The anchoring mechanism includes a piston B and a cat's claw structure. Pistons B are respectively positioned on the left and right sides facing the inner wall of the wellbore, and cat's claw structures are provided at the ends of both pistons B. Driving the pistons B on both sides to extend them allows the cat's claw structures to radially clamp against the inner wall of the wellbore. The adjustment mechanism includes an upper section and a lower section. The upper section, capable of moving up and down, is nested within the lower section. A guide assembly is located between the upper and lower sections. Through the cooperation of the guide assembly, when the upper section is pulled up, it rotates circumferentially, and the oblique mechanism adjusts to the required azimuth angle.

[0009] As a preferred technical solution of this application, the end of the feed drill bit has an internal thread and is tightened by engaging with the external thread of the feed connector at the top of the inclined mechanism. At the same time, the inclined mechanism is provided with a locking tongue, which is driven by piston A and can extend radially. The protruding opening of the locking tongue engages with the corresponding keyway in the feed drill bit, thereby locking the feed drill bit with the inclined mechanism.

[0010] As a preferred technical solution of this application, a pin is connected between the feed drill bit and the feed connector. Under normal circumstances, if the drill bit cannot be released, it can be released by cutting the pin.

[0011] As a preferred technical solution of this application, the anchoring mechanism further includes a piston chamber, which is divided into left and right piston chambers with an opening between them to ensure that the pressure of the two chambers is interconnected. A piston B is adapted to be installed in each of the left and right piston chambers. A spring is connected to the piston B. After the piston B is driven by hydraulic pressure to extend radially to clamp the inner wall of the well, the spring pushes the piston to continuously anchor and clamp.

[0012] As a preferred technical solution of this application, the cat claw structure is provided with multiple protrusions. The piston, driven by hydraulic pressure and the combined action of spring, contacts the cat claw structure at its tip with the well wall, while the protrusions engage with the well wall to prevent movement.

[0013] As a preferred technical solution of this application, the guiding component includes a guide key; the guide key is disposed on the outer wall of the upper short section, and a guide rail groove is provided in the inner wall of the lower short section. When the upper short section is pulled upward, the guide key slides along the guide rail groove, thereby rotating with the lower short section to achieve azimuth adjustment.

[0014] As a preferred technical solution of this application, the lower part of the adjustment mechanism is provided with a pressure regulating valve. After the combined tool is lowered into the well, a low pressure is formed inside the tool. At this time, the pressure regulating valve is passively opened, allowing mud to enter the tool cavity from bottom to top. In addition, as the upper section is raised, the channel can be closed to form a one-way valve, and as the pressure increases, a cat's paw pressure-locking and setting seal can be achieved.

[0015] This utility model has the following advantages:

[0016] (1) Reduce construction risks and improve construction efficiency;

[0017] Compared to traditional sidetracking, which requires four runs (run-in drilling, cementing, plugging, and directional sidetracking), resulting in higher construction risks, longer construction time, and more complex procedures, this solution integrates the directional drilling tool, anchoring mechanism, azimuth adjustment mechanism, and packer. The packer connected to the bottom of this tool effectively prevents the cross-contamination of fluids and pressures between the upper and lower parts. The adjustment mechanism adjusts the tool face angle of the directional drilling mechanism, and the anchoring mechanism anchors the entire tool. Therefore, the tool in this solution can effectively reduce construction procedures and greatly shorten construction time.

[0018] (2) Avoid anchoring errors;

[0019] Traditional anchoring tools, when extending one side for anchoring, are prone to eccentricity due to the irregular diameter of the open well, leading to uneven anchoring force and potential jamming. This solution employs a dual-piston synchronous thrust, resulting in more even force distribution. When the left and right pistons B are hydraulically driven to extend synchronously, the claw structure contacts and embeds itself into the inner wall of the open well. Furthermore, protruding studs are provided on the surface of the claw and the back of piston B. These studs engage with the well wall when the claw is pushed to contact it, preventing tool movement and ensuring highly stable anchoring in this solution. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the anchoring mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the anchoring mechanism of this utility model after installation;

[0024] In the diagram: 1- Inclined mechanism, 2- Drill bit feed, 3- Anchoring mechanism, 4- Adjustment mechanism, 5- Packer, 6- Feed connector, 7- Locking tongue, 8- Piston B, 9- Cat claw structure, 10- Upper short section, 11- Lower short section, 12- Limit check valve, 13- Pressure regulating valve. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0026] It should be noted that the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. Such terms are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0028] Therefore, based on the above issues, please refer to Figure 1This utility model proposes a side-drilling and sealing integrated combination tool to solve the problem.

[0029] See Figures 1-4 The proposed implementation scheme provides a side-drilling sealing integrated tool, which includes an inclined mechanism 1, an anchoring mechanism 3, and an adjustment mechanism 4.

[0030] Among them, see Figure 1 The feed drill 2, the directional mechanism 1, the anchoring mechanism 3, and the adjusting mechanism 4 are sequentially threaded along the axial direction to form a combined tool. The lower end of the adjusting mechanism 4 is connected to a packer 5. The combined tool is sent into the wellbore to a predetermined position by lowering the feed drill 2 into the wellbore.

[0031] Among them, see Figure 2 The adjustment mechanism 4 consists of an upper short section 10 and a lower short section 11. The upper short section 10 can move axially and is fully fitted into the lower short section 11. By lifting the upper short section 10 up and down, the guide rail groove in the lower short section 11 can be adapted to rotate, thereby adjusting to the required orientation or tool face angle.

[0032] Among them, see Figure 3 and Figure 4 After the orientation is adjusted by the adjustment mechanism 4, it is then anchored and locked by the anchoring mechanism 3. The anchoring mechanism 3 includes a cat claw structure 9 and a piston B8. The anchoring mechanism 3 is provided with a piston B8 that can extend toward the inner wall of the wellbore. At the same time, the cat claw structure 9 is provided on the piston B8. When the piston B8 extends radially, the cat claw structure 9 clamps the inner wall of the wellbore for anchoring.

[0033] First, the combined tool is lowered into the wellbore to the designated position (the specific position where side-drilling is required) by the feed drill 2. Then, the short section 10 is pulled up in the adjustment mechanism 4 to rotate and adjust to the required azimuth angle. Since the axial connection between the inclined mechanism 1 and the adjustment mechanism 4 is completed, the inclined mechanism 1 is also adjusted to the required tool face angle. Then, the piston B8 in the anchoring mechanism 3 extends to anchor the cat claw structure 9 to the inner wall of the wellbore.

[0034] Currently, oil drilling operations that require sidetracking often involve numerous complex steps and are time-consuming, making it easy to make mistakes during positioning and compromising the safety of the entire process. Therefore, this solution designs an integrated sidetracking and sealing tool. This solution uses an adjustment mechanism 4 in conjunction with an inclined mechanism 1 to adjust to the required preset azimuth angle after the wellbore is lowered. Furthermore, the anchoring mechanism 3 embeds and anchors the tool into the open hole wall, preventing unnecessary displacement. This tool improves overall efficiency and has an ingenious structure, reducing many cumbersome steps in traditional operations.

[0035] In this embodiment, seeFigure 1 For the inclined mechanism 1, the top of the inclined mechanism 1 has a feed connector 6, which forms a threaded connection with the feed drill 2. After the two mating internal and external threads are tightened by counterclockwise rotation, the inclined mechanism 1 has a locking tongue 7. The locking tongue 7 is driven by the piston A and can extend radially. Thus, the feed drill 2 and the inclined mechanism 1 are locked by inserting the locking tongue 7 into the keyway. The locking tongue 7 driven by the piston A effectively prevents mutual rotation in subsequent work, thereby affecting the accuracy of the setting position of this combination tool.

[0036] Furthermore, in this embodiment, the feed drill bit 2 and the feed connector 6 are connected by a pin. Since the pressure-driven piston A is unlocked after the anchoring is completed, the feed drill bit 2 rotates forward and separates from the feed connector 6 to achieve release. However, when the piston A mechanism fails to unlock (such as when impurities are stuck), and it is not possible to release under normal circumstances, the separation and release can be achieved by shearing the pin structure.

[0037] In this embodiment, see Figure 1 and Figures 3-4 For the anchoring mechanism 3; the anchoring mechanism 3 includes a piston chamber and a piston B8; the piston is welded into the square tube to form an integral part (anchoring mechanism 3). The square tube base is provided with piston chambers on the left and right sides and the front side, and pressure holes are opened in front of the left and right piston chambers. This ensures that after the pressure regulating valve sets the pressure to a predetermined level, the piston B8 in the chamber is activated by pressure. By driving the piston B8 located in the left and right piston chambers to extend to the left and right directions simultaneously, the anchoring mechanism 3 is centered and the force is evenly distributed.

[0038] The piston B8 end is equipped with a cat claw structure 9. When the left and right pistons B8 are pushed outward synchronously by hydraulic drive, the cat claw structure 9 directly contacts the inner wall of the bare well and is embedded and fixed. At the same time, the surface of the cat claw and the back of the piston body are equipped with protruding spike structures. When the cat claw is pushed to contact the inner wall of the well, the spikes further effectively bite against the well wall to prevent the tool from moving.

[0039] It should be noted that, when traditional anchoring tools extend to one side for anchoring, the irregular diameter of the open well can easily lead to tool eccentricity, resulting in uneven anchoring force and the risk of jamming. Therefore, this solution adopts a dual-piston synchronous propulsion method to make the force more even.

[0040] Furthermore, this design incorporates a spring inside piston B8, which serves as an energy replenishment mechanism. When adapting to irregular wellbore sidewalls or formation vibrations, the spring continuously pushes the piston and compensates for gaps. In conjunction with hydraulic anchoring, this achieves precise and stable anchoring of the anchoring mechanism 3, thereby improving anchoring reliability.

[0041] Furthermore, see Figure 4 This tool set has two sets of anchoring mechanisms 3 for anchoring, which further avoids positioning errors.

[0042] In this embodiment, see Figure 3 For the adjustment mechanism 4, the main function of the adjustment mechanism 4 is to adjust the azimuth, thereby adjusting the tool face angle of the inclined mechanism 1. A guide key is provided on the outer wall of the upper short section 10, and the guide key can slide along the guide rail groove (the guide rail groove is a misaligned guide rail groove). When the upper short section 10 is pulled up, the guide key slides along the guide rail groove, thereby driving the upper short section 10 to rotate and realize the azimuth angle adjustment. At the same time, a pressure regulating valve 13 is provided at the lower part of the adjustment mechanism 4 for automatic grouting and pressure-locking and setting of the packer 5. After the combined tool is lowered into the well, a low pressure is formed inside the tool. At this time, the pressure regulating valve 13 is passively opened, allowing the mud to enter the tool cavity from bottom to top. Then the pressure rises to the pressure valve pressure-locking and setting.

[0043] Furthermore, a limit check valve 12 is installed inside the adjustment mechanism 4. When the limit check valve 12 is open, it can prevent pressure buildup from interfering with the orientation adjustment process. After the orientation is adjusted, the anchoring mechanism 3 is used to lock the orientation. At this time, the limit check valve 12 is closed, thereby blocking the cavity passage and establishing a high-pressure cavity so that the anchoring mechanism 3 can start working, that is, to build up higher pressure to extend the cat claw and anchor the device.

[0044] In existing oil drilling operations that require sidetracking, there are often many complex steps and a long time consumption. Usually, four drilling runs are required (i.e., running in for well cleaning, cementing, plugging, and directional sidetracking). Each run is accompanied by running in risks and instrument costs. In addition, when using anchoring tools to anchor in the well, unnecessary displacement occurs, which makes it impossible to guarantee the safety of the entire process.

[0045] Therefore, this case improves overall work efficiency by designing a combined tool with an integrated structural design and a hydraulic-mechanical locking mechanism. The locking tongue 7 controlled by piston A in the feeding mechanism can prevent the device from rotating with the feeding drill string 2 during the drilling process, thus affecting the azimuth angle or tool face angle. Furthermore, the azimuth adjustment mechanism 4 can easily adjust the azimuth by lifting and rotating. Subsequently, the action of the piston in the square tube anchoring mechanism 3 enables the cat claw mechanism to anchor and lock the inner wall of the well. At the same time, a spring is designed to replenish energy after anchoring to prevent the anchor from loosening. The packer 5 at the bottom seals the wellbore and formation to prevent the fluids and pressures from flowing between the upper and lower parts.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A side-drilling and packing integrated tool, characterized in that: It includes a slant mechanism (1), an anchoring mechanism (3), an adjustment mechanism (4), and a packer (5); The inclined mechanism (1), anchoring mechanism (3) and adjusting mechanism (4) are connected and fixed in sequence by thread to form a combined tool. The free end of the inclined mechanism (1) is connected to the feed drill string (2), and the adjusting mechanism (4) is connected to a packer (5) so that the connected combined tool can be sent into the predetermined position in the wellbore through the feed drill string (2). The anchoring mechanism (3) includes a piston B (8) and a cat claw structure (9); the anchoring mechanism (3) is provided with pistons B (8) on the left and right sides facing the inner wall of the well, and the ends of the pistons B (8) on both sides are provided with cat claw structures (9), which drive the pistons B (8) on both sides to extend so that the cat claw structures (9) radially clamp the inner wall of the wellbore; the adjustment mechanism (4) includes an upper short section (10) and a lower short section (11); the upper short section (10) which can move up and down is nested in the lower short section (11), and there is a guide component between the upper and lower short sections (11). With the cooperation of the guide component, when the upper short section (10) is pulled up, the upper short section (10) rotates circumferentially, and the oblique mechanism is adjusted to the required azimuth angle.

2. The side-drilling and packing integrated tool according to claim 1, characterized in that: The end of the feed drill (2) has an internal thread and is tightened with the external thread of the feed connector (6) at the top of the inclined mechanism (1). At the same time, the inclined mechanism (1) is provided with a locking tongue (7). The locking tongue (7) is driven by the piston A and can extend radially. The protruding opening of the locking tongue (7) is engaged with the corresponding keyway in the feed drill (2), thereby locking the feed drill (2) with the inclined mechanism (1).

3. The side-drilling and packing integrated tool according to claim 2, characterized in that: The feed drill bit (2) is connected to the feed connector (6) by a pin. Under normal circumstances, if the drill bit cannot be released, it can be released by cutting the pin.

4. The side-drilling and packing integrated tool according to claim 1, characterized in that: The anchoring mechanism (3) also includes a piston chamber, which is divided into left and right piston chambers with an opening between them to ensure that the pressure of the two chambers is interconnected. A piston B (8) is adapted to be installed in the left and right piston chambers respectively. A spring is connected to the piston B (8). After the piston B (8) is driven by hydraulic pressure to extend radially to clamp the inner wall of the well, the spring pushes the piston to continuously anchor and clamp.

5. The side-drilling and packing integrated tool according to claim 1, characterized in that: The cat claw structure (9) is provided with multiple protrusions. The piston, driven by hydraulic pressure and the combined action of spring, contacts the cat claw structure (9) at its top with the well wall, while the protrusions engage with the well wall to prevent movement.

6. The side-drilling and packing integrated tool according to claim 1, characterized in that: The guiding component includes a guide key; the guide key is set on the outer wall of the upper short section (10), and a guide rail groove is provided in the inner wall of the lower short section (11). When the upper short section (10) is pulled up, the guide key slides along the guide rail groove, thereby rotating with the lower short section (11) to achieve azimuth adjustment.

7. The side-drilling and packing integrated tool according to claim 1, characterized in that: The lower part of the adjustment mechanism (4) is provided with a pressure regulating valve (13). After the combined tool is lowered into the well, a low pressure is formed inside the tool. At this time, the pressure regulating valve (13) is passively opened, so that the mud enters the tool cavity from bottom to top. Then the pressure rises to the pressure valve pressure set.

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