Recyclable guide drilling device
Through the design of the recyclable guide drilling device, the drilling fluid flow pressure is used to adjust the blade wing state, which solves the problems of unrecyclable bottom drilling tools and high construction costs of directional wells, and achieves the optimization of drilling efficiency and cost.
Patent Information
- Application Number
- CN202422154462.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-03
AI Technical Summary
In the existing casing drilling technology, the inability to recycle the bottom drilling tool leads to high overall application cost. The bottom drilling tool recyclable casing drilling technology is costly and limited in its promotion and application. The drilling of directional wells requires rotational guide and drilling tools while drilling, which is high in construction costs.
A recyclable guide drilling device is designed to use the bending screw drilling tool and drilling mechanism to trigger the opening and contraction of the tool wing using the flow pressure of the drilling fluid to achieve dynamic adjustment of the outer diameter of the drilling tool, and meet the requirements of drilling and salvage recovery.
It reduces construction costs, improves drilling time and overall application value, simplifies the complexity of drilling tool combinations, and reduces drilling risks.
Smart Images
Figure CN223062373U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casing drilling, and particularly to a retrievable guiding drilling device. Background Art
[0002] Casing drilling technology uses the casing as the drill string for drilling, and directly conducts cementing and well construction after drilling is completed, which can effectively reduce the well construction period. At the same time, this technology can also be applied to the drilling of formations with severe leakage and fractured zones, significantly reducing the drilling complexity and efficiency.
[0003] Currently, the commonly used surface casing drilling technology is mostly based on drillable bits. After drilling through the drillable bit in the next drilling interval, drilling is directly carried out. The drilling of technical casings or liners is divided into two methods: retrievable bottom hole assembly and non - retrievable bottom hole assembly. Among them, in the non - retrievable bottom hole assembly casing drilling, the bit and positive displacement motor are not retrieved after drilling is completed, which will affect the overall application cost of the technology. While in the retrievable bottom hole assembly casing drilling technology, a bit and tools smaller than the current casing inner diameter are used for drilling. When drilling directional wells, a rotary steerable + hole - opening - while - drilling tool is mostly used for construction, and the usage cost is high, which limits its popularization and application.
[0004] Therefore, in this field, it is desired to provide a retrievable guiding drilling device to solve the above - mentioned technical problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a retrievable guiding drilling device, which can change the outer diameter size of the drill string by actively changing the usage state (i.e., the contracted state and the expanded state) of the cutter wings, so as to more easily meet the overall requirements of drilling and fishing recovery.
[0006] According to the first aspect of the utility model, a retrievable guiding drilling device is provided, including a bent positive displacement motor, and
[0007] a drilling mechanism arranged below the bent positive displacement motor, the drilling mechanism including a drilling main body, at least three driving cabins arranged at intervals inside the drilling main body, and a fluid channel arranged between the driving cabins and the drilling main body and used for receiving drilling fluid.
[0008] Wherein, the drilling mechanism further includes cutter wings adapted to the driving cabins, and a pushing member arranged on the driving cabins and matched with the cutter wings.
[0009] After the drilling fluid enters the fluid channel, a flow pressure is formed, and the pushing member can be triggered by the flow pressure and urge the cutter wings to open outwards.
[0010] In one embodiment, the cutter blade includes a driving part located in the driving chamber and a drill bit part connected to the driving part and located outside the driving chamber.
[0011] In one embodiment, the pushing member includes an induction part for contacting the drilling fluid in the fluid passage and an adjustment part arranged between the induction part and the driving part.
[0012] Wherein, the induction part is configured to control the adjustment part to change the position of the driving part after being triggered by the flow pressure, so as to make the drill bit part open outwards.
[0013] In one embodiment, a limiting table surface configured as a planar structure is provided in the driving chamber, and a contact surface for forming a sealed fit with the limiting table surface is provided on the driving part.
[0014] In one embodiment, a positioning groove is formed on the driving part, and a positioning pin is provided at a corresponding position of the driving chamber. The positioning pin is configured to protrude upwards under the action of the flow pressure in the fluid passage and be clamped with the positioning groove.
[0015] In one embodiment, the pressure threshold of the induction part is smaller than that of the positioning pin.
[0016] In one embodiment, the retrievable guided drilling device further includes a non-magnetic tool arranged above the bent sub, and a plurality of measurement-while-drilling tools are arranged in the non-magnetic tool.
[0017] In one embodiment, a casing is arranged above the non-magnetic tool.
[0018] The retrievable guided drilling device further includes a sealing tool arranged at the top of the non-magnetic tool, and the non-magnetic tool is hung on the casing through the sealing tool.
[0019] According to the second aspect of the present invention, an adjustment method is provided. Using the retrievable guided drilling device as described above, it includes the following steps:
[0020] S1. Lower the retrievable guided drilling device to a predetermined position at the bottom of the well;
[0021] S2. Start the pump. After the drilling fluid enters the fluid passage, a flow pressure is formed and the induction part is triggered. The position of the driving part is changed through the adjustment part to make the cutter blade open outwards for drilling work;
[0022] S3. Stop the pump, the fluid passage is depressurized, and the adjustment part drives the cutter blade to contract inwards and reset.
[0023] In one embodiment, step S201 is further included in S2:
[0024] After the cutter blade is opened to the limit position, the positioning pin extends upward under the action of the flow pressure in the fluid passage to engage with the positioning groove.
[0025] Compared with the prior art, the advantages of the present utility model are as follows:
[0026] Firstly, the cutter blade of the present utility model can be in a contracted state before entering the well, and can be in an opened state after being lowered to a predetermined position at the bottom of the well and starting the pump, so as to meet the shape requirements for wellbore size drilling, effectively overcoming the problems of directional drilling requiring rotary steering and downhole reamer construction due to the small size of conventional drill bits. In addition, after the drilling is completed and the pump is stopped, the cutter blade can be converted from the opened state to the contracted state, which helps to realize the fishing and recovery of the overall drill string assembly, further reducing the complexity of the bottom hole assembly and being beneficial to improving the overall drilling efficiency and reducing the drilling risk.
[0027] Secondly, the present utility model changes the outer diameter size of the drill string by actively changing the usage state (i.e., the contracted state and the opened state) of the cutter blade, so as to more easily meet the overall requirements of drilling and fishing and recovery. In addition, this application can greatly reduce the construction cost (such as not requiring a downhole reamer), further improving the promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The present utility model will be described in detail below with reference to the drawings. In the drawings:
[0029] Figure 1 Schematically shows the structure of the retrievable steering drilling device according to the present utility model;
[0030] Figure 2 is Figure 1 a partial view in
[0031] Figure 3 is Figure 1 a partial view in
[0032] which shows the contracted state of the cutter blade. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] In order to make the technical solutions and advantages of the present utility model clearer and more understandable, the exemplary embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than an exhaustive list of all embodiments. And without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0034] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.
[0035] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements.
[0036] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0037] The present utility model will be further described below with reference to the accompanying drawings.
[0038] Figure 1 Schematically shows the structure of the retrievable guided drilling device according to the present utility model.
[0039] As Figure 1 shown, according to the first aspect of the present utility model, a retrievable guided drilling device is provided, which includes a non-magnetic tool 12, a bent screw drill 11 and a drilling mechanism arranged in sequence from top to bottom. Among them, a casing 13 is provided above the non-magnetic tool 12, and a sealing tool 14 is also provided at the top of the non-magnetic tool 12. Preferably, the non-magnetic tool 12 can be installed on the casing 13 through the sealing tool 14 to facilitate subsequent drilling work.
[0040] Preferably, a plurality of measurement-while-drilling instruments are also provided in the non-magnetic tool 12, and the measurement-while-drilling instruments can be used for measurement-while-drilling of the tool face, well inclination and azimuth of the guided drilling tool.
[0041] Figure 2 For Figure 1 the partial view in, which shows the contracted state of the cutter blade 30.
[0042] According to the present utility model, as Figure 2As shown, the drilling mechanism includes a drilling main body 21 and a drive cabin 22. In the present utility model, there are at least three drive cabins 22, and the three drive cabins 22 are arranged at intervals in the circumferential direction within the drilling main body 21. Preferably, a central flow channel is formed within the drilling main body 21, and the central flow channel can receive drilling fluid from the bent sub 11. Preferably, a flow channel 23 is formed between the drive cabin 22 and the drilling main body 21, and the flow channel 23 can receive a part of the drilling fluid from the central flow channel to assist in driving the pusher (introduced hereinafter) and the positioning pin 222 (introduced hereinafter).
[0043] In the present utility model, as Figure 2 shown, the drilling mechanism further includes a cutter wing 30 adapted to the drive cabin 22, and a pusher provided on the drive cabin 22 and matching with the cutter wing 30. Preferably, under the action of the pusher, the cutter wing 30 can extend outwards to a predetermined position to meet the drilling requirements of downhole work, or can retract inwards to reset to the initial position, so as to more easily meet the size requirements for fishing to achieve the purpose of recovery.
[0044] Figure 3 For Figure 1 the partial view in, which shows the open state of the cutter wing 30.
[0045] In one embodiment, as Figure 2 and 3 shown, the cutter wing 30 includes a driving part 31 and a drill head part 32 fixedly connected to the driving part 31. Preferably, the driving part 31 is arranged within the drive cabin 22, and it can be effectively connected and cooperated with the pusher; while the drill head part 32 is outside the drive cabin 22, and it can complete the action of extending outwards or retracting inwards according to the position change of the driving part 31 within the drive cabin 22, thus not only overcoming the problems of directional drilling requiring rotary steering and under-reamer construction due to the small size of the conventional drill bit, but also more easily meeting the size requirements for lowering into the wellbore and fishing recovery.
[0046] According to the present utility model, as Figure 2 shown, the pusher includes a sensing part 41 and an adjusting part 42. Preferably, the sensing part 41 is embedded in the wall surface of the drive cabin 22, so that it can more easily contact the drilling fluid in the fluid channel 23, further improving the sensing sensitivity of the pusher. The adjusting part 42 is within the drive cabin 22, and the adjusting part 42 can fixedly connect the sensing part 41 and the driving part 31 of the cutter wing 30 together. In this way, it can be ensured that the driving part 31 will only change its position under the action of the adjusting part 42, further improving the adjustment accuracy of the pusher.
[0047] In the present utility model, after the pump is started, the drilling fluid will sequentially pass through the casing 13, the non-magnetic tool 12, and the bent screw drill 11 and enter the central flow channel inside the drilling main body 21, and part of the drilling fluid will flow into the fluid channel 23. As the total amount of liquid in the fluid channel 23 increases, the drilling fluid will form a flow pressure in the fluid channel 23.
[0048] Preferably, the induction part 41 can control and adjust the adjusting part 42 to extend inward under the action of the flow pressure, thereby changing the position of the driving part 31 in the driving chamber 22 until the driving part 31 abuts against the inner wall of the driving chamber 22. During the above process, the drill head part 32 will gradually open outward and reach the limit position (i.e., the maximum opening angle). At this time, the cutter wing 30 will be limited by the positioning pin 222 (introduced below) to ensure the stability and firmness of the retrievable guiding drilling device during the drilling operation.
[0049] In an embodiment of the present utility model, as Figure 2 and 3 shown, a limiting table surface 221 configured as a planar structure is provided in the driving chamber 22, and a contact surface 311 matching the limiting table surface 221 is provided on the driving part 31. Preferably, when the adjusting part 42 is at the maximum elongation, the contact surface 311 of the driving part 31 will form a sealed fit with the limiting table surface 221 of the driving chamber 22, further ensuring the stability after the cutter wing 30 is opened, so as to help improve the efficiency and quality of the downhole drilling operation.
[0050] According to the present utility model, as Figure 2 and 3 shown, a positioning groove 312 is formed on the driving part 31, and a positioning pin 222 is provided at the corresponding position of the driving chamber 22. Preferably, the positioning pin 222 can extend upward under the action of the flow pressure in the fluid channel 23 and be engaged with the positioning groove 312 to limit the movement path of the cutter wing 30, thereby ensuring the safety of the downhole drilling operation.
[0051] In the present utility model, the pressure threshold of the induction part 41 is smaller than that of the positioning pin 222. In other words, after the drilling fluid flows into the fluid channel 23 and forms a flow pressure, the induction part 41 will be triggered first, that is, the position of the driving part 31 in the driving chamber 22 is changed through the adjusting part 42 to achieve the effect of the drill head part 32 opening outward; then as the flow pressure gradually increases, the positioning pin 222 will also extend upward under the action of the flow pressure, so as to ensure that it can form a stable engagement relationship with the positioning groove 312, effectively limiting the cutter wing 30, and further improving the stability and efficiency of the drilling operation.
[0052] Preferably, as Figure 1As shown, a fishing head 15 is provided above the sealing tool 14. Therefore, after the drilling is completed, the retrievable steering drilling device can be smoothly retrieved through the fishing head 15. In addition, the function of replacing the drill string assembly can be achieved through the fishing head 15 either after the drilling is completed or during the drilling process.
[0053] The utility model can pump when lowering the drill to the bottom of the well, and under the action of the flowing pressure, the cutter wings 30 are opened to form a shape that meets the requirements of the wellbore size for drilling, thus overcoming the problems of small size of conventional drill bits and the need for rotary steering and under-reamer construction during directional drilling. In addition, after the drilling is completed, the pump is stopped. Without the action of the flowing pressure, the cutter wings 30 will return to the original position following the adjustment part 42, so that the retrieval work of the overall device can be realized.
[0054] According to the second aspect of the present utility model, an adjustment method is provided, which uses the retrievable steering drilling device as described above, and includes the following steps:
[0055] First, the non-magnetic tool 12, the bent screw drill 11 and the drilling mechanism are installed and hung on the casing 13 through the sealing tool 14, and then lowered to a predetermined position at the bottom of the well.
[0056] Then, the pump is started, and the drilling fluid sequentially passes through the casing 13, the non-magnetic tool 12 and the bent screw drill 11 and enters the central flow channel in the drilling main body 21, and part of the drilling fluid will flow into the fluid channel 23. As the total amount of liquid in the fluid channel 23 increases, the drilling fluid will form a flowing pressure in the fluid channel 23.
[0057] After that, the induction part 41 will be triggered by the flowing pressure, so as to change the position of the driving part 31 in the driving chamber 22 through the adjustment part 42 to achieve the effect of the drill head part 32 opening outwards; then as the flowing pressure gradually increases, the positioning pin 222 will also extend upwards under the action of the flowing pressure to form a clamping connection with the positioning groove 312, further playing an effective limiting role on the cutter wings 30.
[0058] After that, the drilling work is carried out, and after the drilling is completed, the pump is stopped, the drilling fluid stops circulating, the pressure in the fluid channel 23 gradually decreases, the positioning pin 222 first resets to release the lock, the adjustment part 42 drives the driving part 31 to reset, and at the same time promotes the drill head part 32 to contract inwards and reset.
[0059] Finally, a wire rope is lowered and engaged with the fishing head 15 to retrieve the retrievable steering drilling device to the ground, and then the old well operation is carried out to complete the well construction work.
[0060] The following introduces the first embodiment of the present utility model:
[0061] This embodiment takes drilling a φ215.9mm wellbore as an example. The maximum casing 13 size commonly used has an outer diameter of φ177.8mm, a wall thickness of 10.36mm, and an inner diameter of the casing 13 of 157.08mm. On the premise of ensuring drilling safety, a special drill bit (drilling mechanism) with an outer diameter of φ149.2mm under ground conditions is designed to be used in cooperation with a φ120mm bent screw drill tool 11 and a non-magnetic drill tool 12. After being connected, it is hung on the φ177.8mm casing 13 currently used for drilling through a sealing tool 14.
[0062] Further, after the assembled bottom hole assembly is lowered to the bottom of the well, under the condition of not pumping, the special drill bit maintains the outer diameter condition of φ149.2mm as shown in Figure 2 ; after reaching the bottom, start pumping, and the drilling fluid flows through the casing 13, through the non-magnetic drill tool 12 and the bent screw drill tool 11 to reach the central flow channel of the drilling main body 21.
[0063] Further, as shown in Figure 3 the special drill bit, under the action of the drilling fluid, part of the drilling fluid enters the drive chamber 22 through the fluid channel 23, and the flow pressure in the fluid channel 23 triggers the induction part 41, and pushes the cutter wing 30 to open outwards through the adjustment part 42.
[0064] Further, after the cutter wing 30 opens to a specific position, the positioning pin 222 extends under the action of the drilling fluid and engages with the positioning groove 312 to fix the cutter wing 30, so that the drill bit remains stable during the drilling process. At this point, the outer diameter of the special drill bit reaches φ215.9mm. It is easy to understand that during the sliding guidance process, the drill tool is stationary, and the drilling is carried out according to the set tool face. Under the condition of not stopping the pump, the outer diameter of the drill bit remains unchanged, meeting the drilling requirements.
[0065] Further, after the drilling is completed and the pump is stopped, the drilling fluid in the casing 13 stops circulating, the drilling fluid in the fluid channel 23 is stationary and the pressure decreases, the positioning pin 222 returns to its original position, the pushing member stops working, and the cutter wing 30 returns to its original position. At this time, the outer diameter of the drill bit becomes φ149.2mm under ground conditions.
[0066] Further, lower the wire rope, fish the bottom hole assembly to the ground through the fishing head 15 on the hanging sealing tool 14, and then carry out the cementing operation to complete the well construction.
[0067] Compared with the prior art, the advantages of the present utility model are:
[0068] First, the cutter blade 30 of the present utility model can be in a contracted state before being lowered into the well, and can be in an expanded state after being lowered to a predetermined position at the bottom of the well and starting the pump, so as to meet the shape requirements for wellbore size drilling, effectively overcoming the problems of directional drilling requiring rotary steerable and hole opener while drilling due to the small size of conventional drill bits. In addition, after the completion of drilling and stopping the pump, the cutter blade 30 can be converted from the expanded state to the contracted state, which helps to realize the fishing and recovery of the overall drill string assembly, further reducing the complexity of the bottom hole assembly and being beneficial to improving the overall drilling efficiency and reducing drilling risks.
[0069] Second, the present utility model changes the outer diameter size of the drill string by actively changing the use state (i.e., the contracted state and the expanded state) of the cutter blade 30, so as to more easily meet the overall requirements of drilling and fishing recovery. In addition, this application can greatly reduce the construction cost (such as not requiring a hole opener while drilling), further improving the promotion and application value.
[0070] The above is only the preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art can easily make changes or variations within the disclosure scope of the present utility model, and such changes or variations should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims
1. A recyclable directional drilling device, characterized in that, Comprising: A bent screw drill tool (11), and A drilling mechanism disposed below the bent screw drill tool (11), the drilling mechanism comprising a drilling main body (21), at least three drive compartments (22) arranged at intervals within the drilling main body (21), and a fluid passage (23) disposed between the drive compartment (22) and the drilling main body (21) and for receiving drilling fluid, Wherein, the drilling mechanism further comprises a cutter wing (30) adapted to the drive compartment (22), and a pushing member disposed on the drive compartment (22) and matching with the cutter wing (30), After the drilling fluid enters the fluid passage (23), a flow pressure is formed, and the pushing member can be triggered by the flow pressure and urge the cutter wing (30) to open outwards.
2. The recyclable guided drilling device according to claim 1, wherein, The cutter wing (30) comprises a driving portion (31) within the drive compartment (22), and a drill head portion (32) connected to the driving portion (31) and outside the drive compartment (22).
3. The recyclable guided drilling device according to claim 2, characterized in that, The pushing member comprises a sensing portion (41) for contacting the drilling fluid within the fluid passage (23), and an adjusting portion (42) disposed between the sensing portion (41) and the driving portion (31), Wherein, the sensing portion (41) is configured to be able to control the adjusting portion (42) to change the position of the driving portion (31) after being triggered by the flow pressure, so that the drill head portion (32) opens outwards.
4. The recyclable guided drilling device according to claim 3, characterized in that, A limiting table surface (221) configured as a planar structure is provided within the drive compartment (22), and a contact surface (311) for forming a sealed fit with the limiting table surface (221) is provided on the driving portion (31).
5. The recyclable guided drilling device according to claim 4, characterized in that, A positioning groove (312) is formed on the driving portion (31), and a positioning pin (222) is provided at a corresponding position of the drive compartment (22), and the positioning pin (222) is configured to be able to extend upwards under the action of the flow pressure within the fluid passage (23) and engage with the positioning groove (312).
6. The recyclable guided drilling device according to claim 5, characterized in that, The pressure threshold of the sensing portion (41) is smaller than the pressure threshold of the positioning pin (222).
7. The recyclable guided drilling device according to claim 1, characterized in that, The retrievable guided drilling device further comprises a non-magnetic tool (12) disposed above the bent screw drill tool (11), and a plurality of measurement-while-drilling tools are provided within the non-magnetic tool (12).
8. The recyclable guided drilling device according to claim 7, characterized in that, A casing (13) is provided above the non-magnetic tool (12), The retrievable guided drilling device further comprises a sealing tool (14) disposed at the top of the non-magnetic tool (12), and the non-magnetic tool (12) is hung on the casing (13) through the sealing tool (14).