Non-magnetic drill rod capable of preventing slurry leakage
By installing a stirring component and a flow guide inside the non-magnetic drill rod, the problems of leakage and blockage caused by changes in the direction of mud flow were solved, thus improving the stability and efficiency of mud transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-03-06
AI Technical Summary
In complex downhole environments, non-magnetic drill pipes can easily lead to leakage or blockage due to changes in the direction of mud flow.
An agitation assembly, including No. 1 and No. 2 agitator blades, is installed inside the non-magnetic drill rod. The blades are driven to rotate by a connecting rod. Combined with the guide channel and drilling assembly, this ensures the stability of the mud flow speed and direction.
It effectively prevents mud leakage and blockage, and improves mud transportation efficiency.
Smart Images
Figure CN223975107U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a non-magnetic drill rod, specifically, a non-magnetic drill rod that prevents mud leakage. Background Technology
[0002] Non-magnetic drill pipes are special drilling tools used in oil and gas drilling and geological exploration. Their main characteristic is extremely low magnetic permeability, which avoids interference with the magnetic signals of the measurement-while-drilling system (MSWDS) and ensures the accuracy of downhole data. Non-magnetic drill pipes are typically designed with a center hole. During downhole operation, drilling mud is transported through this center hole. Due to the complex downhole environment, the orientation of the non-magnetic drill pipe changes constantly, and its direction of movement also changes. This alters the flow direction and velocity of the drilling mud inside the non-magnetic drill pipe. When the mud flow velocity decreases, mud is prone to accumulation or backflow inside the non-magnetic drill pipe, leading to mud leakage. Furthermore, long-term accumulation of mud inside the non-magnetic drill pipe gradually hardens, causing blockage. Therefore, we propose a non-magnetic drill pipe designed to prevent mud leakage. Utility Model Content
[0003] The purpose of this invention is to provide a non-magnetic drill rod that prevents mud leakage, thereby solving the problems mentioned in the background art.
[0004] When the flow direction of the mud changes inside the non-magnetic drill rod, it is prone to leakage or blockage.
[0005] To achieve the above objectives, this utility model provides a non-magnetic drill rod for preventing mud leakage, comprising a drill rod body, an agitation assembly inside the drill rod body, the agitation assembly including multiple first agitator blades, the multiple first agitator blades being evenly arranged inside the drill rod body, the multiple first agitator blades being inclined towards the same end of the drill rod body, a second agitator blade being provided below each of the multiple first agitator blades, the multiple second agitator blades being rotatably disposed inside the drill rod body, the second agitator blades being perpendicular to the first agitator blades above them, the multiple first agitator blades being coaxially connected, a connecting rod being provided inside the drill rod body for connecting the multiple first agitator blades, a fixing frame being provided at both ends of the connecting rod for supporting the connecting rod, the fixing frame being fixedly disposed inside the drill rod body, and the connecting rod being rotatably disposed between the two fixing frames.
[0006] As a further improvement to this technical solution, a guide groove is provided inside the drill rod body. The guide groove is inclined, and the inclination direction of the guide groove is consistent with the inclination direction of the multiple No. 1 stirring blades.
[0007] The mud flows along the guide channel inside the drill pipe body. At the same time, the connecting rod drives multiple No. 1 stirring blades to agitate the mud. As the mud flows, it drives multiple No. 2 stirring blades to rotate, which agitate the mud and accelerate its flow speed.
[0008] As a further improvement to this technical solution, a drilling assembly is provided at one end of the drill rod body, and the plurality of the first stirring blades are all inclined toward the side close to the drilling assembly. The drilling assembly includes a drill bit, which is slidably disposed inside the drill rod body.
[0009] As a further improvement to this technical solution, the drill rod body is provided with symmetrically sliding locking blocks at one end near the drilling assembly. The locking blocks are used to fix the drill bit. Both locking blocks are made of brittle material. A push rod is fixedly provided at one end of the drill bit near the connecting rod.
[0010] The drill bit is driven to slide outwards by the push rod. As the drill bit slides, it gradually comes into contact with the two chucks, breaks the two chucks, and continues to slide outwards.
[0011] As a further improvement to this technical solution, the push rod is slidably inserted in the middle of the fixed frame, one end of the connecting rod is slidably disposed inside the push rod, a fixed rod is fixedly disposed on the side of the fixed frame near the drill bit, and a part of the push rod is disposed inside the fixed rod.
[0012] As the connecting rod rotates, it drives the push rod to rotate as well, and the push rod drives the drill bit to rotate and drill a hole.
[0013] As a further improvement to this technical solution, the surface of the push rod located inside the fixed rod is fixedly provided with threads, and the inside of the fixed rod is provided with a groove that matches the threads on the surface of the push rod. The end of the connecting rod near the push rod is symmetrically provided with limit blocks, and the inside of the push rod is provided with a groove that matches the limit blocks.
[0014] As the push rod rotates, it slowly moves toward the side closer to the drill bit, causing the drill bit to slide toward the outside of the drill rod body. Once the threaded part of the push rod has completely slid to the outside of the fixed rod, the push rod stops sliding.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] In this non-magnetic drill rod designed to prevent mud leakage, a connecting rod drives multiple primary stirring blades to rotate, agitating the mud inside the drill rod body. Simultaneously, these blades transport the mud towards the end of the drill rod body closest to the borehole assembly. The mud then flows along a guide channel towards the borehole assembly, driving multiple secondary stirring blades to rotate and further agitate the mud, accelerating its flow. This device automatically agitates the mud inside the drill rod body during transport, preventing changes in the mud's flow direction that could lead to leakage or blockage, thus improving the efficiency of mud transport. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a cross-sectional view of the main structure of the drill pipe of the utility model.
[0019] Figure 3 This is a schematic diagram of the stirring component structure of the utility model;
[0020] Figure 4 For utility model Figure 2 Enlarged view of the structure at point A in the middle
[0021] Figure 5 This is a schematic diagram of the drilling assembly structure of the utility model;
[0022] Figure 6 This is a cross-sectional view of the push rod structure of the utility model.
[0023] Figure 7 For utility model Figure 2 Enlarged view of the structure at point B in the middle;
[0024] Figure 8 This is a cross-sectional view of the No. 1 connecting block structure of the utility model.
[0025] The meanings of the labels in the diagram are as follows:
[0026] 1. Drill rod body; 2. Agitator assembly; 21. No. 1 agitator blade; 22. No. 2 agitator blade; 23. Connecting rod; 24. Fixing frame; 3. Guide channel;
[0027] 4. Drilling assembly; 41. Drill bit; 42. Clamping block; 43. Push rod; 44. Fixing rod; 45. Limiting block;
[0028] 5. Connecting block No. 1; 6. Sealing ring; 7. Pressure spring; 8. Connecting block No. 2. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.
[0031] Please see Figures 1-3 As shown, this embodiment provides a non-magnetic drill rod for preventing mud leakage, including a drill rod body 1. An agitation assembly 2 is disposed inside the drill rod body 1. The agitation assembly 2 includes multiple primary agitation blades 21, which are evenly arranged inside the drill rod body 1. All primary agitation blades 21 are inclined towards the same end of the drill rod body 1. Secondary agitation blades 22 are disposed below each of the primary agitation blades 21, and are rotatably disposed inside the drill rod body 1. The secondary agitation blades 22 interact with the primary agitation blades 21 above them. The blades 21 are arranged perpendicularly to each other. When the mud flows, it drives multiple second-stage mixing blades 22 to rotate. At the same time, the multiple second-stage mixing blades 22 agitate the mud and accelerate its flow speed. Multiple first-stage mixing blades 21 are coaxially connected. The drill pipe body 1 is provided with a connecting rod 23 for connecting multiple first-stage mixing blades 21. Both ends of the connecting rod 23 are provided with a fixing frame 24 for supporting the connecting rod 23. The fixing frame 24 is fixedly installed inside the drill pipe body 1, and the connecting rod 23 is rotatably installed between the two fixing frames 24.
[0032] Please see Figures 2-8As shown, a guide channel 3 is provided inside the drill rod body 1. The guide channel 3 is inclined, and the inclination direction of the guide channel 3 is consistent with the inclination direction of multiple first-stage stirring blades 21. When the multiple first-stage stirring blades 21 rotate, they agitate the mud inside the drill rod body 1. At the same time, the mud inside the drill rod body 1 flows along the guide channel 3. A drilling assembly 4 is provided at one end of the drill rod body 1. A first-stage connecting block 5 is threadedly connected to the end of the drill rod body 1 away from the drilling assembly 4. One end of the connecting rod 23 is located inside the first-stage connecting block 5, and one end of the first-stage connecting block 5 is located outside the drill rod body 1. When using this device, the user connects the first-stage connecting block 5 to the drive device to prevent... Mud leaks from one side of the first connecting block 5. A sealing ring 6 is provided at one end of the first connecting block 5 near the first stirring blade 21. The sealing ring 6 is fixedly installed inside the drill rod body 1. A groove matching the first connecting block 5 is opened on the side of the sealing ring 6 near the first connecting block 5. In order to make the sealing ring 6 seal the end of the drill rod body 1 more securely, pressure springs 7 are symmetrically fixedly installed in the middle of the sealing ring 6. A second connecting block 8 is fixedly installed at one end of the connecting rod 23 near the first connecting block 5. The second connecting block 8 is installed inside the first connecting block 5. While connecting one end of the first connecting block 5 to the drive device, the user connects the second connecting block 8 to the drive device.
[0033] Please see Figures 1-6As shown, multiple first-stage stirring blades 21 are all inclined towards the side closest to the drilling assembly 4. The drilling assembly 4 includes a drill bit 41, which is slidably disposed inside the drill rod body 1. To prevent the drill bit 41 from sliding out of the drill rod body 1, two locking blocks 42 are symmetrically slidably disposed vertically at one end of the drill rod body 1 near the drilling assembly 4. The locking blocks 42 are used to fix the drill bit 41. Both locking blocks 42 are made of brittle material. A push rod 43 is fixedly disposed at one end of the drill bit 41 near the connecting rod 23. The push rod 43 is slidably inserted in the middle of the fixing frame 24. One end of the connecting rod 23 is slidably disposed inside the push rod 43. A fixing rod 44 is fixedly disposed on the side of the fixing frame 24 near the drill bit 41. A part of the push rod 43 is disposed inside the fixing rod 44. The surface of the part of the push rod 43 located inside the fixing rod 44 is fixedly threaded. The push rod 43 has a groove inside that matches the thread on its surface. The connecting rod 23 is symmetrically fixed with limit blocks 45 at one end near the push rod 43. The push rod 43 has a groove inside that matches the limit block 45. When the connecting rod 23 rotates, it drives the push rod 43 to rotate. At the same time, the push rod 43 slides towards the side near the drill bit 41 and drives the drill bit 41 to slide towards the outside of the drill rod body 1. When the drill bit 41 contacts the two locking blocks 42, the drill bit 41 breaks the two locking blocks 42 and continues to slide towards the outside of the drill rod body 1. After the drill bit 41 has completely slid to the outside of the drill rod body 1, the threaded part of the push rod 43 slides out from the inside of the fixed rod 44. At the same time, the push rod 43 stops sliding towards the side near the drill bit 41. Then the push rod 43 drives the drill bit 41 to drill a hole, and the mud flows out from the end of the drill rod body 1 near the drill bit 41.
[0034] In practical use, the user first connects one end of the first connecting block 5 to the drive device and starts the drive device to rotate the drill rod body 1. At the same time, the push rod 43 drives the drill bit 41 to drill and transport mud into the drill rod body 1. During the mud transport process, the connecting rod 23 drives multiple first stirring blades 21 to rotate and stir the mud inside the drill rod body 1. At the same time, the multiple first stirring blades 21 push the mud inside the drill rod body 1 towards the end of the drill rod body 1 closer to the drilling assembly 4. The mud inside the drill pipe body 1 flows along the guide channel 3 towards the end of the drill pipe body 1 near the drilling assembly 4, driving multiple No. 2 stirring blades 22 to rotate. At the same time, the multiple No. 2 stirring blades 22 agitate the mud to accelerate its flow rate. During the mud conveying process, the device automatically agitates the mud inside the drill pipe body 1 and accelerates its flow rate, preventing changes in the flow direction of the mud inside the drill pipe body 1 that could lead to mud leakage or blockage inside the drill pipe body 1, thus improving the efficiency of the device in conveying mud.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A mud leakage preventing non-magnetic drill pipe comprising a drill pipe body (1), characterized in that: The inside of the drill rod body (1) is provided with an agitating assembly (2), the agitating assembly (2) comprises a plurality of first stirring blades (21), the plurality of first stirring blades (21) are uniformly arranged in the inside of the drill rod body (1), the plurality of first stirring blades (21) are all arranged obliquely towards the same end of the drill rod body (1), the lower side of each of the plurality of first stirring blades (21) is provided with a second stirring blade (22), the plurality of second stirring blades (22) are all rotationally arranged in the inside of the drill rod body (1), the second stirring blade (22) is arranged perpendicularly to the first stirring blade (21) on the upper side of the second stirring blade (22), the plurality of first stirring blades (21) are coaxially connected, the inside of the drill rod body (1) is provided with a connecting rod (23) for connecting the plurality of first stirring blades (21), both ends of the connecting rod (23) are provided with a fixing frame (24) for supporting the connecting rod (23), the fixing frame (24) is fixedly arranged in the inside of the drill rod body (1), and the connecting rod (23) is rotationally arranged between the two fixing frames (24).
2. The mud loss preventing non-magnetic drill pipe of claim 1, wherein: The inside of the drill rod body (1) is provided with a guide groove (3), the guide groove (3) is arranged obliquely, and the oblique direction of the guide groove (3) is consistent with the oblique direction of the plurality of first stirring blades (21).
3. The mud loss control non-magnetic drill pipe of claim 1, wherein: One end of the drill rod body (1) is provided with a drilling assembly (4), the plurality of first stirring blades (21) are all arranged obliquely towards the side close to the drilling assembly (4), the drilling assembly (4) comprises a drill bit (41), and the drill bit (41) is slidingly arranged in the inside of the drill rod body (1).
4. The mud loss preventing non-magnetic drill pipe of claim 3, wherein: The end of the drill rod body (1) close to the drilling assembly (4) is slidingly provided with a clamping block (42) in an up-down symmetrical manner, the clamping block (42) is used for fixing the drill bit (41), both the clamping blocks (42) are made of brittle material, and one end of the drill bit (41) close to the connecting rod (23) is fixedly provided with a push rod (43).
5. The mud loss preventing non-magnetic drill pipe of claim 4, wherein: The push rod (43) is slidingly inserted into the middle of the fixing frame (24), one end of the connecting rod (23) is slidingly arranged in the inside of the push rod (43), one side of the fixing frame (24) close to the drill bit (41) is fixedly provided with a fixing rod (44), and a part of the push rod (43) is arranged in the inside of the fixing rod (44).
6. The mud loss control non-magnetic drill pipe of claim 5, wherein: The surface of the part of the push rod (43) in the inside of the fixing rod (44) is fixedly provided with a thread, and the inside of the fixing rod (44) is provided with a notch matched with the thread on the surface of the push rod (43).
7. The mud loss control non-magnetic drill pipe of claim 6, wherein: One end of the connecting rod (23) close to the push rod (43) is fixedly provided with a limiting block (45) in a left-right symmetrical manner, and the inside of the push rod (43) is provided with a notch matched with the limiting block (45).
8. The mud loss control non-magnetic drill pipe of claim 3, wherein: The one end of the drill rod body (1) is threadedly connected with a first connecting block (5), one end of the connecting rod (23) is arranged inside the first connecting block (5), one end of the first connecting block (5) is arranged outside the drill rod body (1), and the first connecting block (5) is provided with a sealing ring (6) at the end close to the first stirring blade (21).
9. The mud loss control non-magnetic drill pipe of claim 8, wherein: The sealing ring (6) is fixedly arranged inside the drill rod body (1), and the side of the sealing ring (6) close to the first connecting block (5) is provided with a notch matched with the first connecting block (5).
10. The mud loss control non-magnetic drill pipe of claim 9, wherein: The middle of the sealing ring (6) is fixedly arranged with a pressure spring (7) in a left-right symmetry mode, one end of the connecting rod (23) close to the first connecting block (5) is fixedly arranged with a second connecting block (8), and the second connecting block (8) is arranged inside the first connecting block (5).