Composite cuttings bed breaker

Abstract

The utility model discloses a composite cuttings bed breaker, which relates to the technical field of petroleum and natural gas engineering, and comprises a rod body with an axis, a first connecting part at one end and a second connecting part at the other end; the middle area of the rod body is provided with a plurality of first protruding parts which are distributed in the circumferential direction and extend in the axial direction, and a first groove is formed between every two adjacent first protruding parts. The first lateral area of the rod body is provided with a plurality of second protruding parts which are distributed in the circumferential direction and spirally extend around the axis, and a second groove is formed between every two adjacent second protruding parts; the second side area of the rod body is provided with a plurality of third protruding parts which are distributed in the circumferential direction and spirally extend around the axis, and a third groove is formed between every two adjacent third protruding parts; and the like. The height of a rock debris bed can be effectively reduced in the drilling working process, and drilling fluid is driven to form spiral flow so as to increase the migration efficiency of rock debris.

Description

Technical Field

[0001] This utility model relates to the field of petroleum and natural gas engineering technology, and in particular to a composite rock cuttings bed destroyer. Background Technology

[0002] As conventional oil and gas reserves gradually decrease, the development of unconventional oil and gas is becoming increasingly important, leading to the widespread application of extended reach horizontal wells. Because extended reach horizontal wells have a larger contact area with the reservoir, they can effectively exploit oil and gas resources in complex terrains such as mountains and oceans. However, while offering higher extraction efficiency, extended reach horizontal wells typically face challenges during operation, including high friction, high torque, and difficulties in wellbore cleaning.

[0003] During the drilling of highly deviated and horizontal wells, cuttings tend to accumulate on the lower side of the wellbore under gravity, forming cuttings beds. The presence of cuttings beds is the root cause of many complex downhole problems, such as increased drill string friction and torque, formation pressure leakage caused by high-density drilling fluid, and a significant reduction in mechanical drilling rate. These problems pose serious challenges to operational safety and overall drilling efficiency.

[0004] Currently, the main method for cleaning cuttings beds is to improve wellbore cleanliness by optimizing drilling parameters, such as increasing rotational speed, flow rate, and drilling fluid properties. However, drilling parameters cannot usually be easily changed during the drilling process. For example, increasing the flow rate can effectively enhance wellbore cleaning, but excessive flow velocity will significantly increase annular pressure loss, leading to an increase in ECD (excessive flow rate), and will also cause abnormal increases in pump pressure, posing a significant challenge to the stable operation of drilling equipment; even excessively high flow velocities can damage the wellbore, leading to formation loss.

[0005] To address the issue of unclean wellbore, cuttings bed breakers have been introduced during operations to clean the wellbore, demonstrating good performance, particularly in cleaning cuttings from horizontal well sections. However, during the cleaning process, the cuttings bed breaker suffers from problems such as excessive cuttings bed height and the accumulation of cuttings within the wellbore, hindering efficient removal. Therefore, a new cuttings bed breaker is urgently needed to simultaneously solve these problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a composite cuttings bed destroyer, which can effectively reduce the height of the cuttings bed during drilling and drive the drilling fluid to form a spiral flow to increase the efficiency of cuttings transport.

[0007] The specific technical solution of this utility model embodiment is as follows:

[0008] A composite rock cuttings bed destroyer, the composite rock cuttings bed destroyer comprising:

[0009] A rod having an axis, one end of the rod having a first connecting part, and the other end of the rod having a second connecting part;

[0010] The central region of the rod has multiple first protrusions distributed circumferentially and extending axially, and a first groove is formed between adjacent first protrusions.

[0011] The first side region of the rod has multiple circumferentially distributed second protrusions that extend spirally around the axis, and a second groove is formed between adjacent second protrusions;

[0012] The second side region of the rod has multiple circumferentially distributed third protrusions that extend spirally around the axis, and a third groove is formed between adjacent third protrusions;

[0013] The first side region and the second side region are located on both sides of the central region, the first groove and the second groove are connected in a one-to-one correspondence, the first groove and the third groove are connected in a one-to-one correspondence, and the spiral extension direction of the second protrusion is opposite to the spiral extension direction of the third protrusion.

[0014] Preferably, the number of the first protrusions is equal to the number of the second protrusions and the number of the third protrusions;

[0015] One end of the first protrusion is connected to one end of the second protrusion;

[0016] The other end of the first protrusion is connected to one end of the third protrusion.

[0017] Preferably, one end of the first groove is directly connected to one end of the second groove; the other end of the first groove is directly connected to one end of the third groove.

[0018] Preferably, the second groove extends spirally around the axis, and the third groove extends spirally around the axis; the spiral extension direction of the second groove is opposite to the spiral extension direction of the third groove.

[0019] The second protrusion extends spirally with an angle of 35 to 45 degrees;

[0020] The third protrusion extends spirally with an angle of 35 to 45 degrees.

[0021] Preferably, the angle of the spiral extension of the second protrusion is equal to the angle of the spiral extension of the third protrusion.

[0022] Preferably, the first connecting part is used to connect with the drill pipe, and the second connecting part is used to connect with the drill pipe.

[0023] Preferably, the height of the first protrusion is equal to the height of the second protrusion and the third protrusion.

[0024] Preferably, the outer contour formed by the plurality of first protrusions is circular; the outer contour formed by the plurality of second protrusions is circular; and the outer contour formed by the plurality of third protrusions is circular.

[0025] Preferably, the two opposite sides of the first protrusion are rectangular in shape, and the extended surfaces of the two sides intersect the axis.

[0026] Preferably, a first gap region is provided between the first connecting portion and the second protrusion;

[0027] There is a second gap region between the second connecting portion and the third protrusion.

[0028] The technical solution of this utility model has the following significant beneficial effects:

[0029] The composite cuttings bed disruptor in this application cleans the wellbore through two mechanisms. First, the first protrusion, in conjunction with the first groove, mechanically agitates the bottom cuttings bed during rotation, generating a tangential spiral flow in the annulus. This spiral flow carries cuttings back from the bottom to the upper annulus, preventing cuttings accumulation and effectively reducing the cuttings bed height during drilling. Second, the second protrusion, in conjunction with the second groove, and the third protrusion, in conjunction with the third groove, generate an axial spiral flow in the annulus during rotation, improving the overall efficiency of cuttings transport to the central region. Through these two combined effects, the risk of stuck pipe and the drilling efficiency can be effectively reduced. During drilling and testing operations, the rational arrangement of the number and location of the composite cuttings bed disruptor plays a crucial role in both drilling safety and operational efficiency. Attached Figure Description

[0030] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0031] Figure 1 This is a schematic diagram of the composite rock cuttings bed destroyer in an embodiment of this utility model.

[0032] The reference numerals in the above figures are as follows:

[0033] 1. Rod body; 2. First connecting part; 3. Second connecting part; 4. Central region; 5. First protrusion; 6. First groove; 7. First side region; 8. Second side region; 9. Second protrusion; 10. Second groove; 11. Third protrusion; 12. Third groove; 13. First interval region; 14. Second interval region. Detailed Implementation

[0034] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are for illustrative purposes only and should not be construed as limiting the utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model.

[0035] In order to effectively reduce the height of the cuttings bed during drilling operations and increase the efficiency of cuttings transport by driving the drilling fluid into a spiral flow, this application proposes a composite cuttings bed disruptor. Figure 1 This is a schematic diagram of the composite rock cuttings bed destroyer in an embodiment of this utility model, as shown below. Figure 1 As shown, the composite rock cuttings bed destroyer may include: a rod 1 with an axis, one end of the rod 1 having a first connecting portion 2, and the other end of the rod 1 having a second connecting portion 3. The central region 4 of the rod 1 has multiple circumferentially distributed, axially extending first protrusions 5, with a first groove 6 formed between adjacent first protrusions 5. The first lateral region 7 of the rod 1 has multiple circumferentially distributed, spirally extending second protrusions 9 around the axis, with a second groove 10 formed between adjacent second protrusions 9. The second lateral region 8 of the rod 1 has multiple circumferentially distributed, spirally extending third protrusions 11 around the axis, with a third groove 12 formed between adjacent third protrusions 11. The first lateral region 7 and the second lateral region 8 are located on opposite sides of the central region 4. The first groove 6 and the second groove 10 are connected in a one-to-one correspondence, and the first groove 6 and the third groove 12 are connected in a one-to-one correspondence. The spiral extension direction of the second protrusions 9 is opposite to the spiral extension direction of the third protrusions 11.

[0036] like Figure 1As shown, rod 1 extends along its own axis. Generally, the cross-section of rod 1 is circular. A first connecting portion 2 at one end of rod 1 is used to connect to other components, such as a drill pipe. A second connecting portion 3 at the other end of rod 1 is used to connect to other components, such as a drill pipe. One of the first connecting portion 2 and the second connecting portion 3 is connected by an external thread, and the other by an internal thread.

[0037] The first protrusions 5 are distributed circumferentially along the rod body 1 and extend axially along the rod body 1. The first protrusions 5 can be evenly distributed circumferentially along the rod body 1. A first groove 6 is formed between adjacent first protrusions 5. The number of first grooves 6 is equal to the number of first protrusions 5. During rotation, the first protrusions 5, in conjunction with the first grooves 6, can generate a tangential spiral flow in the annulus, thereby drawing rock debris from the bottom of the annulus back to the upper part of the annulus, thus reducing the accumulation of rock debris bed at the bottom. Furthermore, the two opposite sides of the first protrusions 5 are rectangular in shape, and the extended surfaces of the two sides intersect the axis, which can increase the intensity of the tangential spiral flow generated in the annulus during rotation.

[0038] The second protrusion 9 is located in the first lateral region 7 of the rod body 1. The second protrusion 9 is distributed circumferentially along the rod body 1 and extends spirally around the axis. A second groove 10 is formed between adjacent second protrusions 9. The number of second grooves 10 is equal to the number of second protrusions 9. The third protrusion 11 is located in the second lateral region 8 of the rod body 1. The third protrusion 11 is distributed circumferentially along the rod body 1 and extends spirally around the axis. A third groove 12 is formed between adjacent third protrusions 11. The number of third grooves 12 is equal to the number of third protrusions 11. The first lateral region 7 and the second lateral region 8 are located on both sides of the central region 4, respectively. The second protrusions 9, in conjunction with the second grooves 10, can generate an axial spiral flow in the annular space during rotation, thereby improving the overall efficiency of rock debris transport.

[0039] The number of the first protrusion 5 is equal to the number of the second protrusion 9 and the number of the third protrusion 11, so that the first groove 6 and the second groove 10 are connected in a one-to-one correspondence, and the first groove 6 and the third groove 12 are connected in a one-to-one correspondence.

[0040] To achieve the above structure, one end of the first protrusion 5 is connected to one end of the second protrusion 9. The other end of the first protrusion 5 is connected to one end of the third protrusion 11. In this structure, one end of the first groove 6 can be directly connected to one end of the second groove 10, and the other end of the first groove 6 can be directly connected to one end of the third groove 12.

[0041] The spiral extension direction of the second protrusion 9 is opposite to the spiral extension direction of the third protrusion 11. Correspondingly, as feasible, the second groove 10 extends spirally around the axis, and the third groove 12 extends spirally around the axis; the spiral extension direction of the second groove 10 is opposite to the spiral extension direction of the third groove 12.

[0042] To further enhance the intensity of the axial spiral flow in the annular space of the composite cuttings bed destroyer, thereby allowing the spiral flow generated by the second protrusion 9 in conjunction with the second groove 10 to travel further in the annular space, and the spiral flow generated by the third protrusion 11 in conjunction with the third groove 12 to travel further in the annular space, the spiral extension of the second protrusion 9 can have an angle of deflection of 35 to 45 degrees, and the spiral extension of the third protrusion 11 can also have an angle of deflection of 35 to 45 degrees. These deflection angles are relative to the axis of the rod 1. Alternatively, the deflection angle of the spiral extension of the second protrusion 9 can be equal to the deflection angle of the spiral extension of the third protrusion 11.

[0043] To improve the overall maneuverability of the composite cuttings bed destructor, and to simultaneously achieve the effects of axial spiral flow generated by the second protrusion 9 and the second groove 10, axial spiral flow generated by the third protrusion 11 and the third groove 12, and tangential spiral flow generated by the first protrusion 5 and the first groove 6, the height of the first protrusion 5 is equal to the heights of the second protrusion 9 and the third protrusion 11. Furthermore, the overall outer contour formed by the multiple first protrusions 5 is circular; the overall outer contour formed by the multiple second protrusions 9 is circular; and the overall outer contour formed by the multiple third protrusions 11 is circular. This structure further improves the overall maneuverability of the composite cuttings bed destructor.

[0044] A first gap region 13 exists between the first connecting part 2 and the second protrusion 9. A second gap region 14 exists between the second connecting part 3 and the third protrusion 11. In this way, when the composite cuttings bed destroyer is connected to other components, it ensures that the opposite ends of the second groove 10 and the third groove 12 are not blocked or sealed by other components, thereby ensuring that the axial spiral flow generated by the composite cuttings bed destroyer in the annulus travels further, ensuring the overall cuttings transport efficiency, and thus ensuring the working efficiency of drilling operations.

[0045] The composite cuttings bed disruptor in this application cleans the wellbore through two mechanisms. First, the first protrusion 5, in conjunction with the first groove 6, mechanically agitates the bottom cuttings bed during rotation, generating a tangential spiral flow in the annulus. This spiral flow carries cuttings back from the bottom to the upper annulus, preventing cuttings accumulation and effectively reducing the cuttings bed height during drilling. Second, the second protrusion 9, in conjunction with the second groove 10, and the third protrusion 11, in conjunction with the third groove 12, generate an axial spiral flow in the annulus during rotation, improving the overall efficiency of cuttings transport to the central region 4. Through these two combined effects, the risk of stuck pipe and the efficiency of drilling operations can be effectively reduced. During drilling and testing operations, the rational arrangement of the number and location of the composite cuttings bed disruptor plays a crucial role in the safety and efficiency of drilling operations.

[0046] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A composite debris bed disrupter characterized by, The composite type cuttings bed breaker comprises: a rod body with an axis, one end of the rod body having a first connecting part, the other end of the rod body having a second connecting part; a middle part of the rod body having a plurality of first protruding parts distributed in a circumferential direction and extending in an axial direction, a first groove being formed between adjacent first protruding parts; a first side part of the rod body having a plurality of second protruding parts distributed in a circumferential direction and extending in a helical direction around the axis, a second groove being formed between adjacent second protruding parts; a second side part of the rod body having a plurality of third protruding parts distributed in a circumferential direction and extending in a helical direction around the axis, a third groove being formed between adjacent third protruding parts; the first side part and the second side part being respectively located on two sides of the middle part, the first groove and the second groove being in one-to-one correspondence and in direct communication, the first groove and the third groove being in one-to-one correspondence and in direct communication, the second protruding parts extending in a helical direction opposite to the third protruding parts.

2. The composite debris bed disrupter of claim 1, wherein, the number of the first protruding parts being equal to the number of the second protruding parts and the number of the third protruding parts; one end of the first protruding part being connected to one end of the second protruding part; the other end of the first protruding part being connected to one end of the third protruding part.

3. The composite debris bed disrupter of claim 2, wherein, one end of the first groove being in butt joint with one end of the second groove for direct communication, the other end of the first groove being in butt joint with one end of the third groove for direct communication.

4. The composite debris bed disrupter of claim 1, wherein, the second groove extending in a helical direction around the axis, the third groove extending in a helical direction around the axis, the second groove extending in a helical direction opposite to the third groove; the second protruding parts extending in a helical direction with an angle of 35 degrees to 45 degrees; the third protruding parts extending in a helical direction with an angle of 35 degrees to 45 degrees.

5. The composite debris bed disrupter of claim 1, wherein, the angle of the second protruding parts extending in a helical direction being equal to the angle of the third protruding parts extending in a helical direction.

6. The composite debris bed disrupter of claim 1, wherein, the first connecting part being used for connecting with a drill rod, the second connecting part being used for connecting with a drill rod.

7. The composite debris bed disrupter of claim 1, wherein, the height of the first protruding parts being equal to the height of the second protruding parts and the third protruding parts.

8. The composite debris bed disrupter of claim 7, wherein, the plurality of first protruding parts collectively forming a circular outer contour, the plurality of second protruding parts collectively forming a circular outer contour, and the plurality of third protruding parts collectively forming a circular outer contour.

9. The composite debris bed disrupter of claim 1, wherein, the opposite two side surfaces of the first protruding parts being in a rectangular shape, and the extension surfaces of the two side surfaces intersecting with the axis.

10. The composite debris bed disrupter of claim 1, wherein, a first spacing region being formed between the first connecting part and the second protruding parts; a second spacing region being formed between the second connecting part and the third protruding parts.

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