Compound pendulum deviation correction acceleration tool for well drilling

Abstract

The invention relates to the technical field of well drilling tools, and discloses a compound pendulum deviation correction acceleration tool for well drilling, which comprises a drill bit connector comprising a connecting section and an eccentric section; the bearing pup joint is connected with the connecting section; the impact mechanism is rotatably arranged in the bearing short joint, and the impact mechanism and the eccentric section are eccentrically arranged and are used for abutting against the eccentric section; the impeller mechanism is rotatably arranged in the bearing short joint, the impeller mechanism is connected with the impact mechanism, a flowing channel used for flowing of drilling fluid is formed in the impeller mechanism, and the impeller mechanism is driven to rotate when the drilling fluid flows along the flowing channel; by means of the method, the problem that in the vertical drilling process, a borehole is irregular due to drill jumping and drill bit vortex motion can be greatly solved, the service life of the drill bit is prolonged, risks caused by the borehole irregularity in the later casing running process and other operation processes are greatly reduced, meanwhile, the drifting frequency is reduced, the operation cost is reduced, and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools, in particular to a compound-oscillation deflection correction and speed-up tool for drilling. Background Art

[0002] As oil and gas exploration gradually advances into deep formations and high-difficulty and ultra-high-difficulty formations, drilling operations face increasingly complex geological environments and drilling process problems, and the difficulty of exploration and exploitation continues to increase. During the drilling of deep and ultra-deep wells, the formations fluctuate greatly, the lithology is variable, and the heterogeneity is serious. As the depth of the well increases, the wellbore structure becomes more complex and the borehole size becomes smaller. The formations are interlaced with soft and hard, the rock hardness and plasticity increase, the abrasiveness increases, the drillability deteriorates, and the lower drill bit vibrates violently. The stick-slip vibration of the drill bit causes the drill bit to stop running due to insufficient rock-breaking torque, and the continuous rotation of the turntable causes the drill string to twist and accumulate energy; the energy accumulated in the drill string enables the drill bit to break the rock obstruction, and the drill bit is suddenly released and vibrates around the axis of the drill string at high speed. At the same time, the rotation of the drill string during the drilling process causes the drill bit to vortex, resulting in accelerated wear of the drill bit and an increase in the borehole size, affecting the mechanical drilling speed and the return of drilling fluid. Summary of the invention

[0003] The object of the present invention is to provide a double-oscillation deflection correction and speed-up tool for drilling, aiming to solve or improve at least one of the above-mentioned technical problems.

[0004] To achieve the above object, the present invention provides the following solution: The present invention provides a drilling compound pendulum deflection correction and speed-up tool, comprising:

[0005] A drill bit connector, comprising a connecting section and an eccentric section;

[0006] A supporting short circuit connected to the connecting section;

[0007] An impact mechanism is rotatably disposed in the supporting short circuit, the impact mechanism is eccentrically disposed with respect to the eccentric segment and is used to abut against the eccentric segment;

[0008] The impeller mechanism is rotatably arranged in the supporting short circuit, the impeller mechanism is connected to the impact mechanism, and a flow channel for the flow of drilling fluid is arranged in the impeller mechanism. When the drilling fluid flows along the flow channel, the impeller mechanism is driven to rotate.

[0009] Optionally, the impeller mechanism comprises:

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

[0011] An impeller is arranged on the transmission center shaft;

[0012] An impeller protection sleeve is rotatably disposed in the supporting short circuit, and a gap is provided between the impeller protection sleeve and the impeller;

[0013] The first wave generator is arranged between the impeller protective cover and the transmission center shaft, and the first wave generator is connected with the gap to form the flow channel.

[0014] Optionally, the impact mechanism includes:

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

[0016] An impactor is arranged on the rotatable impact shaft, and is used for abutting against the eccentric section.

[0017] Optionally, also include:

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

[0019] The upper supporting ring is connected to the supporting short circuit through a first anti-drop bolt, and the upper supporting ring is used to cover the stable central axis.

[0020] Optionally, the impeller protective cover comprises:

[0021] The outer ring is short-circuited with the support through a second anti-drop bolt;

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

[0023] Optionally, also include:

[0024] The lower supporting ring is connected to the supporting short circuit through a third anti-drop bolt, and the lower supporting ring is used to cover the connecting section.

[0025] Optionally, the connecting section is connected to the supporting short circuit via threads.

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

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

[0028] Optionally, a second wave generator is arranged on the stable central axis.

[0029] The present invention discloses the following technical effects: the impeller mechanism is driven to rotate by the drilling fluid to drive the impact mechanism to rotate, so that the impact mechanism cooperates with the eccentric structure to produce collision, thereby generating periodic vibration. At the same time, when the impact mechanism rotates, the flow channel is periodically changed, thereby generating periodic axial vibration to achieve the effect of impact drilling, release the energy accumulated in the drill string when the drill bit cuts the formation, reduce the stick-slip vibration phenomenon of the drill tool during the drilling process, reduce the damage of the drill bit caused by the stick-slip vibration, and increase the service life. While releasing the energy accumulated in the drill string when the drill bit cuts the formation, it can also play a role in assisting rock breaking, which plays a certain role in improving the 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 the drilling process. It can correct the inclination and prevent the vortex of the drill bit from avoiding the expansion of the wellbore. It can extend the life of the drill bit, reduce the time of drilling, reduce drilling costs, and effectively solve the problem of difficult drilling in deep formations, hard formations, and soft and hard interlaced formations. It can greatly reduce the problem of wellbore irregularities caused by drill jumping and drill bit vortex during vertical drilling, increase the service life of the drill bit, and greatly reduce the risks caused by wellbore irregularities during the later casing lowering and other operations. At the same time, it reduces the number of well clearances, reduces operating costs, and shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 for Figure 1 Cross-sectional view in the mid-CC direction;

[0033] Figure 3 It is a three-dimensional diagram of the first wave generator of the present invention.

[0034] In the figure: 1. drill bit connector; 2. supporting short circuit; 3. third anti-drop bolt; 4. lower supporting ring; 5. impactor; 6. rotatable impact shaft; 7. fixing buckle; 8. second anti-drop bolt; 9. impeller protective cover; 10. impeller; 11. transmission center shaft; 12. stable center shaft; 13. first anti-drop bolt; 14. upper supporting ring; 15. second wave generator; 16. first wave generator. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in 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.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1-Figure 3 The present invention provides a drilling compound pendulum deflection correction and speed-up tool, comprising:

[0038] A drill bit connector 1, comprising a connecting section and an eccentric section;

[0039] A supporting short circuit 2 is connected to the connecting section;

[0040] An impact mechanism is rotatably disposed in the supporting short circuit 2, and 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 arranged in the supporting short circuit 2. The impeller mechanism is connected to the impact mechanism. A flow channel for the flow of drilling fluid is arranged in the impeller mechanism. When the drilling fluid flows along the flow channel, the impeller mechanism is driven to rotate.

[0042] The drilling fluid drives the impeller mechanism to rotate and drives the impact mechanism to rotate, so that the impact mechanism cooperates with the eccentric structure to produce collision, thereby generating periodic vibration. At the same time, when the impact mechanism rotates, the flow channel produces periodic changes, thereby generating periodic axial vibration to achieve the effect of impact drilling, releasing the energy accumulated in the drill string when the drill bit cuts the formation, reducing the stick-slip vibration phenomenon of the drill tool during the drilling process, reducing the damage of the drill bit caused by stick-slip vibration, and increasing the service life. While releasing the energy accumulated in the drill string when the drill bit cuts the formation, it can also play a role in assisting rock breaking, which plays a certain role in increasing the drilling speed.

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

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

[0045] The impeller 10 is arranged on the transmission center shaft 11;

[0046] The impeller protection sleeve 9 is arranged in the supporting short circuit 2, and there is a gap between the impeller protection sleeve 9 and the impeller 10;

[0047] The first wave generator 16 is disposed between the impeller protection 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 is composed of two circular rings with a hole in the middle.

[0049] The drilling fluid flows through the gap between the impeller 10 and the impeller protective sleeve 9 to drive the impeller 10 to rotate, thereby generating power, thereby driving the transmission center shaft 11 to rotate.

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

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

[0052] The impactor 5 is arranged on the rotatable impact shaft 6, and the impactor 5 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 vibration, thereby reducing the problem of reduced mechanical drilling speed caused by stick-slip vibration of the drilling tool, increased wear and reduced life of the drill bit, and reducing the probability of downhole accidents caused by stick-slip vibration, thereby ensuring the smooth progress of oil and gas exploration and development.

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

[0055] A stable central shaft 12 connected to the transmission central shaft 11;

[0056] The upper supporting ring 14 is connected to the supporting short circuit 2 through the first anti-drop bolt 13 , and the upper supporting ring 14 is used to cover and stabilize the central shaft 12 .

[0057] The upper support ring 14 is a split semi-cylinder. The two semi-cylinders are combined to achieve clearance fit with the stable central axis 12 through the spherical surface, forming a high-pair suspension type rotating mechanism. Driven by the high-speed impeller 10, the stable central axis 12 and other central components rotate at high speed to form a compound pendulum mechanism. When the drill string deviates from the original wellbore trajectory due to external force, it generates a force to restore the drill string to the original drilling wellbore trajectory, allowing the drill string to drill vertically. At the same time, the wellbore expansion and accelerated wear of the drill bit caused by the vortex of the drill bit are reduced, the wellbore quality is improved, and the service life of the drill bit is extended.

[0058] In one embodiment of the present invention, the impeller protective cover 9 comprises:

[0059] The outer ring is connected to the supporting short circuit 2 through the second anti-drop bolt 8;

[0060] The inner ring is rotatably connected inside 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 protection sleeve 9 and the impeller 10 .

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

[0063] The lower supporting ring 4 is connected to the supporting short circuit 2 through the third anti-drop bolt 3, and the lower supporting ring 4 is used for covering and connecting the sections.

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

[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 respectively through threads.

[0066] In one embodiment of the present invention, a fixing buckle 7 is provided on the rotatable impact shaft 6. Specifically, the fixing buckle 7 is threadedly connected to the rotatable impact shaft 6 and is used for the integral connection between the drill connector 1 and the upper axial moving part. The rotatable impact shaft 6 is in surface contact with the fixing buckle 7, providing a force to prevent the drill connector 1 from being disconnected.

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

[0068] Furthermore, after the tool is assembled, the area of ​​the drilling fluid flow channel is reduced compared to the inner diameter of the equivalent drill tool of the ordinary drill pipe connected to its upper part, so that the flow area of ​​the drilling fluid is reduced, thereby achieving the purpose of increasing the pressure and speed, cleaning the wellbore, improving the drilling fluid's ability to carry cuttings, reducing the drill bit wear caused by secondary grinding, and increasing the service life of the drill bit.

[0069] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A drilling compound pendulum deflection correction and speed-up tool, characterized in that: include: A drill bit connector (1), comprising a connecting section and an eccentric section; A supporting short circuit (2) connected to the connecting section; An impact mechanism is rotatably disposed in the supporting short-circuit (2), the impact mechanism being eccentrically disposed with respect to the eccentric section and being used to abut against the eccentric section; An impeller mechanism is rotatably arranged in the supporting short circuit (2), the impeller mechanism is connected to the impact mechanism, and a flow channel for the flow of drilling fluid is arranged in the impeller mechanism. When the drilling fluid flows along the flow channel, the impeller mechanism is driven to rotate.

2. A drilling compound pendulum deflection correction and speed-up tool according to claim 1, characterized in that: The impeller mechanism comprises: A transmission center shaft (11) connected to the impact mechanism; An impeller (10) is arranged on the transmission center shaft (11); An impeller protection sleeve (9) is rotatably disposed in the supporting short circuit (2), and a gap is provided between the impeller protection sleeve (9) and the impeller (10); A first wave generator (16) is arranged between the impeller protective cover (9) and the transmission center shaft (11), and the first wave generator (16) is connected to the gap to form the flow channel.

3. A drilling compound pendulum deflection correction and speed-up tool according to claim 2, characterized in that: The impact mechanism comprises: A rotatable impact shaft (6) connected to the transmission center shaft (11); An impactor (5) is arranged on the rotatable impact shaft (6), and the impactor (5) is used to abut against the eccentric section.

4. A drilling compound pendulum deflection correction and speed-up tool according to claim 2, characterized in that: Also includes: A stabilizing central shaft (12) connected to the transmission central shaft (11); An upper supporting ring (14) is connected to the supporting short circuit (2) via a first anti-drop bolt (13), and the upper supporting ring (14) is used to cover the stable central axis (12).

5. A drilling compound pendulum deflection correction and speed-up tool according to claim 3, characterized in that: The impeller protective cover (9) comprises: The outer ring is connected to the supporting short circuit (2) via a second anti-drop bolt (8); The inner ring is rotatably connected inside the outer ring, and the inner ring is connected to the first wave generator (16).

6. A drilling compound pendulum deflection correction and speed-up tool according to claim 1, characterized in that: Also includes: The lower supporting ring (4) is connected to the supporting short circuit (2) via a third anti-drop bolt (3), and the lower supporting ring (4) is used to cover the connecting section.

7. A drilling compound pendulum deflection correction and speed-up tool according to claim 1, characterized in that: The connecting section is connected to the supporting short circuit (2) via threads.

8. A drilling compound pendulum deflection correction and speed-up tool according to claim 5, characterized in that: The first wave generator (16) is connected to the inner ring and the transmission center shaft (11) respectively via threads.

9. A drilling compound pendulum deflection correction and speed-up tool according to claim 3, characterized in that: The rotatable impact shaft (6) is provided with a fixing buckle (7).

10. A drilling compound pendulum deflection correction and speed-up tool according to claim 4, characterized in that: A second wave generator (15) is arranged on the stable central axis (12).

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