Multi-section deviation-preventing drill rod and deviation-preventing device thereof
By using a multi-section anti-deviation drill rod structure and a combination of straightening units and annular teeth, the problem of drill rod deviation under complex geological conditions is solved, achieving high-precision drilling and low maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-03-27
AI Technical Summary
Existing drill pipe anti-deviation devices have limited anti-deviation effects, poor adaptability, and high maintenance costs. They are difficult to maintain drilling accuracy and stability under complex geological conditions, and maintenance is complex and expensive.
The drill rod adopts a multi-section anti-deviation structure, including a centralizing unit, a top annular tooth, and a bottom annular tooth. The axially spaced distribution of the multi-section drill rod provides uniform centralizing force. Combined with a three-stage borehole structure, it enhances the stability and guidance of the drill bit and reduces frictional wear.
It significantly improves drilling accuracy and stability, adapts to various operating scenarios, reduces maintenance frequency and costs, extends equipment life, and improves drilling efficiency.
Smart Images
Figure CN224049095U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a drill rod technical field, concretely relates to a multi -section anti -drift drill rod and its anti -drift device. BACKGROUND
[0002] Drill rod is prone to deviation in the use process, and there are many anti-deviation devices on the market at present, part of the device prevents the drill rod from deviating by setting the guide sleeve outside the drill rod, the guide sleeve contacts the drill hole wall and provides certain guidance for the drill rod, trying to keep the drill rod on the predetermined drill hole track, some devices adopt the mode of increasing counterweight to keep the drill rod vertically stable in the drilling process by relying on additional weight, in addition, part of the device utilizes the complex mechanical structure or control system to realize the guidance and anti-deviation control of the drill rod, and simultaneously, most of the existing patent technologies focus on the improvement of single anti-deviation means, such as single-section centralizer, and these single-section centralizers are usually rigid structures, which are installed on the drill rod and utilize the contact between the outer diameter and the drill hole wall to limit the swing of the drill rod, thereby playing a role in preventing the drill hole from deviating to a certain extent.
[0003] However, the existing anti-deviation devices have the following shortcomings:
[0004] (1) Limited anti-deviation effect: the existing anti-deviation device relying on the guide sleeve is difficult to accurately control the gap between the guide sleeve and the drill rod when facing complex geological conditions (such as uneven hardness of rock, existence of interlayer, etc.) or high-strength drilling operation, and the drill rod is still prone to deviation; the single-section structure has limited overall centralizing capacity for the drill rod in the long-distance drilling process, and cannot effectively control the swing of the drill rod under different depths and complex geological conditions, resulting in poor guiding effect.
[0005] (2) Poor adaptability: although the mode of increasing counterweight can keep the drill rod vertical to a certain extent, it increases the overall weight and energy consumption of the equipment, which is not applicable to some operation scenes with strict weight restrictions (such as in-hole drilling, small-scale equipment drilling, etc.), and cannot effectively deal with the deviation problem caused by factors such as vibration and torque change in the drilling process.
[0006] (3) Poor maintainability: the device adopting complex mechanical structure or control system has complex structure design and high operation difficulty, which requires professional technicians to install and debug, thereby increasing the use threshold and labor cost. Moreover, these devices are prone to part wear, loosening and other problems in the long-term use process, leading to gradual decline of the anti-deviation effect, difficulty in repairing and replacing parts, and high maintenance cost.
[0007] Therefore, there is an urgent need for a drilling anti-deviation device with good anti-deviation effect, strong adaptability and easy maintenance. SUMMARY
[0008] The utility model discloses a multi-section anti-deviation drill rod and its anti-deviation device to solve the problems of limited anti-deviation effect, poor adaptability and high maintenance cost of the existing anti-deviation device.
[0009] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:
[0010] An anti-deviation device comprises a righting unit, and a top annular tooth and a bottom annular tooth arranged at two ends of the righting unit respectively.
[0011] Drill rod bodies are connected between adjacent anti-deviation devices, and the anti-deviation devices are distributed along the axial direction of the multi-section drill rod bodies.
[0012] Further, the righting unit is in the shape of a cylinder, the inner diameter of the righting unit is matched with the outer diameter of the drill rod body, and the outer diameter of the righting unit is smaller than the inner diameter of the drill hole and has a gap.
[0013] Further, one end of the righting unit is provided with axially uniform annular grooves, and the axially uniform annular grooves form the teeth of the bottom annular tooth.
[0014] Further, the outer wall of the other end of the righting unit is provided with an outwardly protruding annular platform, the annular platform is provided with axially uniform annular grooves arranged in a ring shape, and the axially uniform annular grooves form the teeth of the top annular tooth.
[0015] Further, the outer diameter of the bottom annular tooth is consistent with the outer diameter of the righting unit.
[0016] The outer diameter of the top annular tooth is larger than the outer diameter of the righting unit.
[0017] Further, the top annular tooth is arranged at one end of the righting unit away from the drill bit.
[0018] The bottom annular tooth is arranged at one end of the righting unit close to the drill bit.
[0019] Further, the teeth of the top annular tooth and the bottom annular tooth are both directed to the side of the drill bit, and both are in the shape of a cuboid.
[0020] Further, the top annular tooth, the bottom annular tooth and the drill bit form a three-stage aperture structure.
[0021] A multi-section anti-deviation drill rod comprises multi-section drill rod bodies and drill bits at the ends of the drill rod bodies, and the anti-deviation device of claim 1 is arranged between adjacent drill rod bodies.
[0022] Further, the anti-deviation device is arranged in multiple numbers along the axial direction of the multi-section anti-deviation drill rod.
[0023] Compared with the prior art, the utility model has the advantages that:
[0024] The utility model provides a kind of multi-section anti-deviation drill rod and its anti-deviation device, by setting righting unit, top annular tooth and bottom annular tooth, the stability of drilling tool in the process of drilling is significantly improved, effectively guarantee that drilling precision reaches higher level, as follows:
[0025] (1) significantly improve drilling precision: the multi-section structure of the device can provide righting force for drilling tool uniformly and continuously at different depths and positions of drilling, can effectively inhibit the deflection phenomenon of drilling tool, greatly improve drilling precision, greatly meet the drilling operation demand;Top annular tooth, bottom annular tooth and drill bit, three combinations into three-stage aperture structure, when cavity appears under complex stratum condition, drill bit and bottom annular tooth can play double guiding role, further improve the stability of drill pipe, reduce the degree of drilling deflection.
[0026] (2) strong adaptability: the device structure is light and handy, applicable to any operation scene, and drilling deviation problem caused by factors such as vibration and torque change does not occur in the drilling process.
[0027] (3) good quality performance: bottom annular tooth disperses the friction force borne by top annular tooth in working process from the mechanical principle, and the dispersion of friction force greatly slows down the wear rate of top annular tooth, thereby significantly prolonging the service life of the whole device and reducing the replacement frequency caused by wear.
[0028] (4) simple operation, low maintenance cost: the device structure is simple, convenient and fast to operate, and professional technical personnel are not needed for installation and operation, and with the extension of the service life of the device, the replacement frequency is reduced, thereby making the operation cost and maintenance cost significantly decrease, and also reducing the operation interruption time caused by device replacement, improving the overall efficiency of drilling operation. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other embodiments can also be obtained from these drawings without creative labor.
[0030] Figure 1 It is the structure schematic view of embodiment 1 applied to drill pipe;
[0031] In the drawing, the mark is:
[0032] 1-righting unit, 2-drill pipe body, 3-top annular tooth, 4-bottom annular tooth, 5-drill bit. DETAILED DESCRIPTION
[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0034] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0036] Will Figure 1 The length direction of the drill pipe body 2 in the middle is defined as the axial direction.
[0037] Example 1:
[0038] As Figure 1 shown, the present embodiment provides a deviation preventing device, which can significantly improve the stability of the drilling tool during drilling, effectively ensure that the drilling accuracy reaches a high level, including a righting unit 1 and a top annular tooth 3 and a bottom annular tooth 4 fixed at both ends of the righting unit 1 respectively, three deviation preventing devices are connected between the four sections of drill pipe body 2, the deviation preventing devices are spaced along the axial direction of the four sections of drill pipe body 2, so that they can provide righting force for the drilling tool uniformly and continuously at different depths and positions of the drilling hole. This uniform righting force distribution can effectively suppress the deviation of the drilling tool, greatly improve the drilling accuracy, and greatly meet the drilling operation requirements.
[0039] In the present embodiment, at least three deviation preventing devices are provided, and in other embodiments, four or five can also be provided, without being limited thereto.
[0040] In this embodiment, the material of the centralizer unit 1 is high-strength and wear-resistant alloy material, which is in the shape of a cylinder. The inner diameter of the centralizer unit 1 is adapted to the outer diameter of the drill pipe body 2. The outer diameter of the centralizer unit 1 is smaller than the inner diameter of the borehole and has a gap. Each centralizer unit 1 is fixedly connected to the drill pipe body 2 through a threaded connection.
[0041] One end of the centralizer unit 1 has axially uniform ring-shaped grooves, and the teeth of the bottom ring teeth 4 are formed between the axially uniform ring-shaped grooves.
[0042] The other end of the centralizer unit 1 has an outwardly protruding ring platform, and the ring platform has axially uniform ring-shaped grooves, and the teeth of the top ring teeth 3 are formed between the axially uniform ring-shaped grooves.
[0043] The materials of the top ring teeth 3 and the bottom ring teeth 4 are high-strength and wear-resistant alloy materials. In other embodiments, the materials of the top ring teeth 3 and the bottom ring teeth 4 can be consistent with the material of the drill bit 5. The top ring teeth 3 and the bottom ring teeth 4 are in a double-ring structure, thereby enhancing the guiding and flexibility of the device and ensuring good deviation prevention effect. At the same time, the teeth of the top ring teeth 3 and the bottom ring teeth 4 have cutting function, thereby preventing the drill pipe from being stuck.
[0044] The top ring teeth 3 are arranged at the end of the centralizer unit 1 away from the drill bit 5 and are located at the top of the centralizer unit 1. The bottom ring teeth 4 are arranged at the end of the centralizer unit 1 close to the drill bit 5 and are located at the bottom of the centralizer unit 1.
[0045] The outer diameter of the bottom ring teeth 4 is consistent with the outer diameter of the centralizer unit 1. The outer diameter of the top ring teeth 3 is larger than the outer diameter of the centralizer unit 1. The outer diameter of the bottom ring teeth 4 is larger than the outer diameter of the drill bit 5. In actual work, the top ring teeth 3 contact the inner wall of the borehole due to its larger outer diameter, thereby providing the main centralizing force for the drilling tool and ensuring that the drilling tool maintains a relatively stable posture in the borehole. The bottom ring teeth 4 assist the top ring teeth 3 between the top ring teeth 3 and the inner wall of the borehole. On the one hand, the bottom ring teeth 4 act as a guide to assist the top ring teeth 3 in centralizing. If the bottom of the hole is expanded due to loose strata or mechanical impact, the drill bit 5 deviates at the bottom of the hole. At this time, the bottom ring teeth 4 will act as a larger centralizer compared to the drill bit 5, thereby reducing or eliminating the degree of deviation of the drill bit 5, thereby further enhancing the overall centralizing effect. On the other hand, the bottom ring teeth 4 disperse the friction force borne by the top ring teeth 3, thereby effectively reducing the wear degree of the top ring teeth 3 and significantly prolonging the service life of the entire device and reducing the frequency of replacement due to wear.
[0046] The top ring teeth 3, the bottom ring teeth 4, and the drill bit 5 in the device form a three-level borehole structure. When a cavity occurs in complex strata conditions, the drill bit 5 and the bottom ring teeth 4 can play a dual guiding role, thereby further improving the stability of the drill pipe body 2 and reducing the degree of deviation of the borehole.
[0047] The teeth of the top annular teeth 3 and the bottom annular teeth 4 are smooth, preventing the teeth from damaging the hole wall when rotating, and in the embodiment, the teeth are cuboid, and in other embodiments, the teeth can also be other smooth structures, and the teeth of the top annular teeth 3 and the bottom annular teeth 4 are arranged towards the side of the drill bit 5.
[0048] The device is provided with the righting unit 1, the top annular teeth 3 and the bottom annular teeth 4, which are simple and reasonable in structure, convenient and fast to operate, and can be installed and operated without professional technical personnel, and the frequency of replacement is reduced with the extension of the service life of the device, so that the operation and maintenance costs are significantly reduced, and the interruption time of the operation caused by the replacement of the device is reduced, and the overall efficiency of the drilling operation is improved.
[0049] Embodiment 2:
[0050] The embodiment provides a multi-section anti-deviation drill rod, which comprises four drill rod bodies 2 and drill bits 5 at the ends of the drill rod bodies 2, and the anti-deviation devices in the embodiment 1 are connected between adjacent drill rod bodies 2 through threads.
[0051] Specifically, the anti-deviation device is arranged axially and uniformly on the outer shaft of the anti-deviation drill rod, and in other embodiments, four or five anti-deviation devices can be arranged, and the number of the drill rod bodies 2 is also changed, which is not limited thereto.
[0052] The above describes the utility model by using specific examples, which is only used to help understand the utility model and does not limit the utility model. According to the idea of the utility model, those skilled in the art of the utility model can make some simple deductions, deformations or substitutions.
Claims
1. A deviation-preventing device, characterized in that: the deviation-preventing device comprises a righting unit (1), and a top annular tooth (3) and a bottom annular tooth (4) arranged at both ends of the righting unit (1) respectively; and a drill rod body (2) is connected between adjacent deviation-preventing devices, and the deviation-preventing devices are distributed along the drill rod body (2) in an axial direction.
2. The deviation-preventing device according to claim 1, characterized in that: the righting unit (1) is in a cylindrical shape, the inner diameter of the righting unit (1) is matched with the outer diameter of the drill rod body (2), and the outer diameter of the righting unit (1) is smaller than the inner diameter of the drill hole and has a gap.
3. The deviation-preventing device according to claim 2, characterized in that: one end of the righting unit (1) is provided with axially uniform annular grooves, and the axially uniform annular grooves form the teeth of the bottom annular tooth (4).
4. The deviation-preventing device according to claim 3, characterized in that: the outer wall of the other end of the righting unit (1) is provided with an outwardly protruding annular platform, and the annular platform is provided with axially uniform annular grooves, and the axially uniform annular grooves form the teeth of the top annular tooth (3).
5. The deviation-preventing device according to claim 4, characterized in that: the outer diameter of the bottom annular tooth (4) is consistent with the outer diameter of the righting unit (1); and the outer diameter of the top annular tooth (3) is larger than the outer diameter of the righting unit (1).
6. The deviation-preventing device according to claim 5, characterized in that: the top annular tooth (3) is arranged at the end of the righting unit (1) away from the drill bit (5); and the bottom annular tooth (4) is arranged at the end of the righting unit (1) close to the drill bit (5).
7. The deviation-preventing device according to claim 6, characterized in that: the teeth of the top annular tooth (3) and the bottom annular tooth (4) are both directed to the side of the drill bit (5), and are both in a cuboid shape.
8. The deviation-preventing device according to claim 7, characterized in that: the top annular tooth (3), the bottom annular tooth (4) and the drill bit (5) form a three-stage aperture structure.
9. A multi-section deviation-preventing drill rod, characterized in that: the multi-section deviation-preventing drill rod comprises a plurality of drill rod bodies (2) and drill bits (5) at the ends of the drill rod bodies (2), and the deviation-preventing devices according to claim 1 are arranged between adjacent drill rod bodies (2).
10. The multi-section deviation-preventing drill rod according to claim 9, characterized in that: a plurality of the deviation-preventing devices are arranged along the multi-section deviation-preventing drill rod in an axial direction.