Compound pendulum straightening and speed-up tool for drilling

Abstract

The present application relates to the technical fields of drilling tools, and discloses a complex pendulum straightening and speed increasing tool for drilling, which comprises a drill bit connector, a supporting short circuit and an impact mechanism. The drill bit connector comprises a connecting section and an eccentric section. The impact mechanism is rotatably arranged in the supporting short circuit and is eccentrically arranged with the eccentric section. The impeller mechanism is rotatably arranged in the supporting short circuit and is connected with the impact mechanism. The impeller mechanism is provided with a flow channel for the flow of drilling fluid. When the drilling fluid flows along the flow channel, the impeller mechanism is driven to rotate. The present application can greatly reduce the irregular problems of the borehole caused by the jumping of the drill and the vortex of the drill bit during the vertical drilling process, increase the service life of the drill bit, greatly reduce the risks caused by the irregular borehole during the later casing and other operation processes, reduce the number of well passes, reduce the operation cost and reduce the construction period.

Description

Technical Field

[0001] This invention relates to the field of drilling tool technology, and in particular to a drilling tool for correcting deviation and increasing speed. Background Technology

[0002] As oil and gas exploration gradually advances into deeper formations and highly challenging and ultra-high-difficulty formations, drilling operations face increasingly complex geological environments and drilling technology challenges, leading to continuously increasing exploration and extraction difficulties. During the drilling of deep and ultra-deep wells, the formation exhibits significant variations in undulation, diverse lithology, and severe heterogeneity. With increasing well depth, the wellbore structure becomes more complex, the wellbore size decreases, and the formation becomes a mixture of hard and soft rock, increasing rock hardness and plasticity, enhancing abrasiveness, and reducing drillability. This results in intense stick-slip vibration of the lower drill string. The stick-slip vibration of the drill bit causes it to stop operating due to insufficient rock-breaking torque. The continuous rotation of the rotary table causes the drill string to twist, accumulating energy. This accumulated energy allows the drill bit to break through rock resistance, and the sudden release of this energy causes it to vibrate at high speed around the drill string axis. Simultaneously, the rotation of the drill string during drilling causes vortexing of the drill bit, leading to accelerated drill bit wear and an increase in wellbore size, affecting the rate of penetration (ROP) and drilling fluid return. Summary of the Invention

[0003] The purpose of this invention is to provide a drilling tool for correcting deviations and increasing speed, which aims to solve or improve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a drilling double-swing correction and speed-up tool, comprising:

[0005] Drill bit connector, including connecting section and eccentric section;

[0006] Supporting short circuit, connected to the connecting segment;

[0007] An impact mechanism is rotatably disposed within the supporting short joint, and the impact mechanism is eccentrically disposed with respect to the eccentric section and is used to abut against the eccentric section;

[0008] An impeller mechanism is rotatably disposed within the support short joint. The impeller mechanism is connected to the impact mechanism. The impeller mechanism is provided with a flow channel for drilling fluid flow. When the drilling fluid flows along the flow channel, it drives the impeller mechanism to rotate.

[0009] Optionally, the impeller mechanism includes:

[0010] The transmission center shaft is connected to the impact mechanism;

[0011] The impeller is mounted on the central shaft of the transmission.

[0012] An impeller protective sleeve is rotatably disposed within the support short joint, and there is a gap between the impeller protective sleeve and the impeller;

[0013] A first wave generator is disposed between the impeller protective sleeve and the transmission central shaft, and the first wave generator is connected to the gap to form the flow channel.

[0014] Optionally, the impact mechanism includes:

[0015] A rotatable impact shaft is connected to the transmission center shaft;

[0016] An impactor is disposed on the rotatable impact shaft, and the impactor is used to abut against the eccentric section.

[0017] Optional, also includes:

[0018] A stabilizing central shaft is connected to the transmission central shaft;

[0019] The upper support ring is connected to the support short-circuited by the first anti-drop bolt, and the upper support ring is used to cover the stabilizing central shaft.

[0020] Optionally, the impeller protective sleeve includes:

[0021] The outer ring is connected to the support via a second anti-drop bolt;

[0022] The inner ring is rotatably connected within the outer ring, and the inner ring is connected to the first wave generator.

[0023] Optional, also includes:

[0024] The lower support ring is connected to the support via a third anti-drop bolt, and the lower support ring is used to cover the connecting section.

[0025] Optionally, the connecting segment is connected to the support short-circuit via a thread.

[0026] Optionally, the first wave generator is connected to the inner ring and the transmission center shaft respectively via threads.

[0027] Optionally, a retaining buckle is provided on the rotatable impact shaft.

[0028] Optionally, a second wave generator is provided on the stabilizing central axis.

[0029] This invention discloses the following technical effects: By driving the impeller mechanism to rotate through drilling fluid, the impact mechanism rotates, causing the impact mechanism to engage with the eccentric structure to generate impact, thus producing periodic vibration. Simultaneously, the rotation of the impact mechanism causes periodic changes in the flow channel, resulting in periodic axial vibration, achieving the effect of impact drilling. This releases the energy accumulated in the drill string when the drill bit cuts the formation, reduces stick-slip vibration of the drill string during drilling, reduces damage to the drill bit caused by stick-slip vibration, and increases its service life. While releasing the energy accumulated in the drill string when the drill bit cuts the formation, it also assists in rock breaking, contributing to increased drilling speed. The tool itself has the ability to correct deviation in the vertical direction, thereby maintaining the stability of the vertical drilling direction and reducing the vortex of the drill bit during drilling. It can play a role in correcting deviation and preventing drill bit vortex from increasing the well diameter, thus extending the life of the drill bit, reducing tripping time, reducing drilling costs, and effectively solving the problem of difficult drilling in deep formations, hard formations, and mixed soft and hard formations. It can greatly reduce the problems of wellbore irregularities caused by drill skipping and drill bit vortex during vertical drilling, increase the service life of the drill bit, greatly reduce the risks caused by wellbore irregularities during subsequent casing and other operations, and at the same time reduce the number of well cleaning cycles, reduce operating costs, and shorten the construction cycle. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 for Figure 1 A cross-sectional view along the CC direction;

[0033] Figure 3 This is a perspective view of the first wave generator of the present invention.

[0034] In the diagram: 1. Drill bit connector; 2. Support short connector; 3. Third anti-drop bolt; 4. Lower support ring; 5. Impactor; 6. Rotatable impact shaft; 7. Fixing buckle; 8. Second anti-drop bolt; 9. Impeller protective sleeve; 10. Impeller; 11. Drive center shaft; 12. Stabilizing center shaft; 13. First anti-drop bolt; 14. Upper support ring; 15. Second wave generator; 16. First wave generator. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-3 This invention provides a drilling correction and speed-up tool, comprising:

[0038] Drill bit connector 1, including a connecting section and an eccentric section;

[0039] Support short circuit 2, which connects to the connecting section;

[0040] The impact mechanism is rotatably disposed within the support short joint 2. The impact mechanism is eccentrically disposed with the eccentric section and is used to abut against the eccentric section.

[0041] The impeller mechanism is rotatably mounted within the support short joint 2. The impeller mechanism is connected to the impact mechanism. The impeller mechanism is provided with a flow channel for drilling fluid flow. When the drilling fluid flows along the flow channel, it drives the impeller mechanism to rotate.

[0042] The drilling fluid drives the impeller mechanism to rotate, which in turn drives the impact mechanism. This impact mechanism, in conjunction with the eccentric structure, produces an impact, generating periodic vibrations. Simultaneously, the rotation of the impact mechanism causes periodic changes in the flow channel, resulting in periodic axial vibrations that achieve the effect of impact drilling. This releases the energy accumulated in the drill string when the drill bit cuts the formation, reduces stick-slip vibration of the drill string during drilling, minimizes damage to the drill bit caused by stick-slip vibration, and increases its service life. In addition to releasing the energy accumulated in the drill string when the drill bit cuts the formation, it also assists in rock breaking and contributes to increasing drilling speed.

[0043] In one embodiment of the present invention, the impeller mechanism includes:

[0044] The transmission center shaft 11 is connected to the impact mechanism;

[0045] Impeller 10 is mounted on transmission center shaft 11;

[0046] Impeller protective sleeve 9 is installed inside the support short joint 2, and there is a gap between impeller protective sleeve 9 and impeller 10;

[0047] The first wave generator 16 is disposed between the impeller protective sleeve 9 and the transmission center shaft 11, and the first wave generator 16 is connected to the gap to form a flow channel.

[0048] Furthermore, the first wave generator 16 consists of two rings with a central opening.

[0049] Drilling fluid flows through the gap between the impeller 10 and the impeller protective sleeve 9, driving the impeller 10 to rotate and generating power, which in turn drives the transmission center shaft 11 to rotate.

[0050] In one embodiment of the present invention, the impact mechanism includes:

[0051] The rotatable impact shaft 6 is connected to the transmission center shaft 11;

[0052] Impactor 5 is mounted on the rotatable impact shaft 6 and is used to abut against the eccentric section.

[0053] The impactor 5 is a sleeve structure, which is sleeved on the eccentric section. The impactor 5 and the eccentric section form a cam vibration structure, so that when the impactor 5 rotates, it cooperates with the eccentric section to achieve impact and generate vibration. This reduces the mechanical drilling speed reduction caused by stick-slip vibration, the problem of increased drill bit wear and reduced life, and reduces the probability of downhole accidents caused by stick-slip vibration, thus ensuring the smooth progress of oil and gas exploration and development.

[0054] In one embodiment of the present invention, it further includes:

[0055] The stabilizing center shaft 12 is connected to the transmission center shaft 11;

[0056] The upper support ring 14 is connected to the support shorting 2 via the first anti-drop bolt 13. The upper support ring 14 is used to cover and stabilize the central shaft 12.

[0057] The upper support ring 14 is a split semi-cylindrical shape. The two semi-cylindricals are combined to achieve clearance fit with the stabilizing central shaft 12 through the spherical surface, forming a high-pair suspended rotating mechanism. Driven by the high-speed impeller 10, the stabilizing central shaft 12 and other central components generate high-speed rotation, forming a compound pendulum mechanism. When the drill string deviates from the original wellbore trajectory due to external force, it generates a force that restores the drill string to the original drilling wellbore trajectory, so that the drill string drills vertically. At the same time, it reduces wellbore enlargement and accelerated drill bit wear caused by drill bit whirl, improves wellbore quality, and extends drill bit service life.

[0058] In one embodiment of the present invention, the impeller protective sleeve 9 includes:

[0059] The outer ring is connected to the support shorting 2 via the second anti-drop bolt 8;

[0060] The inner ring is rotatably connected to the outer ring, and the inner ring is connected to the first wave generator 16.

[0061] There is a gap between the inner ring of the impeller protective sleeve 9 and the impeller 10.

[0062] In one embodiment of the present invention, it further includes:

[0063] The lower support ring 4 is connected to the support short joint 2 via the third anti-drop bolt 3. The lower support ring 4 is used to cover and connect the sections.

[0064] In one embodiment of the present invention, the connecting section and the supporting short joint 2 are connected by threads, so that the drill bit provides the torsional power required for rock breaking to the drill bit through the drill bit connector 1 during the rotation of the drill bit.

[0065] In one embodiment of the present invention, the first wave generator 16 is connected to the inner ring and the transmission center shaft 11 by threads.

[0066] In one embodiment of the present invention, a retaining buckle 7 is provided on the rotatable impact shaft 6. Specifically, the retaining buckle 7 is threadedly connected to the rotatable impact shaft 6 for the overall connection between the drill bit connector 1 and the upper axial moving component. The rotatable impact shaft 6 and the retaining buckle 7 are in surface contact, providing a force to prevent the drill bit connector 1 from disengaging.

[0067] In one embodiment of the present invention, a second wave generator 15 is provided on the stabilizing central shaft 12.

[0068] Furthermore, after this tool is assembled, the drilling fluid flow channel area and the equivalent drill string inner diameter of the ordinary drill pipe connected to it are reduced, resulting in a reduction in the drilling fluid flow area. This achieves the purpose of pressure build-up and speed increase, thereby cleaning the wellbore, improving the drilling fluid's ability to carry cuttings, reducing drill bit wear caused by secondary grinding, and increasing drill bit service life.

[0069] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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, and therefore should not be construed as a limitation of this invention.

[0070] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A compound pendulum straightening and speed-up tool for drilling a well, characterized in that, The drill bit connector (1) comprises a connecting section and an eccentric section. The impact mechanism is rotatably arranged in the supporting short circuit (2), and the impact mechanism is arranged eccentrically with the eccentric section and used for abutting against the eccentric section. The impeller mechanism comprises: The transmission center shaft (11) is connected with the impact mechanism. The impeller protection sleeve (9) is rotatably arranged in the supporting short circuit (2), and the impeller protection sleeve (9) has a gap with the impeller (10). The first wave generator (16) is arranged between the impeller protection sleeve (9) and the transmission center shaft (11), the first wave generator (16) is connected with the gap to form the flow channel, and the first wave generator (16) is composed of two annular rings with a hole in the middle. The impact mechanism comprises: The rotatable impact shaft (6) is connected with the transmission center shaft (11). The impactor (5) is arranged on the rotatable impact shaft (6), and the impactor (5) is used for abutting against the eccentric section. Further comprising: The upper supporting ring (14) is connected with the supporting short circuit (2) through the first anti-falling bolt (13), and the upper supporting ring (14) is used for covering the stable center shaft (12). The impeller protection sleeve (9) comprises: The inner ring is rotatably connected in the outer ring, and the inner ring is connected with the first wave generator (16).

2. The whirling, pendulum correction, speed-up tool for drilling a well of claim 1, wherein, Further comprising: The lower supporting ring (4) is connected with the supporting short circuit (2) through the third anti-falling bolt (3), and the lower supporting ring (4) is used for covering the connecting section. The connecting section and the supporting short circuit (2) are connected through threads.

3. The whirling, pendulum correction, speed up tool for drilling a well bore of claim 1 wherein, The first wave generator (16) is connected with the inner ring and the transmission center shaft (11) through threads respectively. The rotatable impact shaft (6) is provided with a fixing buckle (7). The stable center shaft (12) is provided with a second wave generator (15).

4. The whirling, pendulum correction, speed up tool for drilling a well bore of claim 1 wherein, ​ ​ 5. The whirling, pendulum correction, speed-up tool for drilling a wellbore of claim 1, wherein, ​ 6. The whirling, pendulum correction, speed-up tool for drilling a well bore according to claim 3, wherein, ​ 7. The whirling, pendulum correction, speed-up tool for drilling a well bore according to claim 1 wherein, ​ 8. The whirling, pendulum correction, speed-up tool for drilling a well bore according to claim 2, wherein, ​

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