Anti-balling engineering investigation bionic hard alloy drill bit
By machining a biomimetic non-smooth structure on the surface of the cemented carbide drill bit, the problem of mud packing caused by cuttings adhesion was solved, achieving a mud packing prevention effect for the drill bit, extending its service life and improving drilling efficiency.
Patent Information
- Application Number
- CN202520107551.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-01-17
AI Technical Summary
When existing cemented carbide drill bits are used for engineering exploration, rock cuttings tend to adhere and form mud pockets when drilling into clay layers, shale, and other formations. This leads to increased wear on the drill bit's cutting teeth, reduced drilling speed, shortened service life, and decreased drilling efficiency.
Biomimetic non-smooth structures, including bumps and grooves, are machined on the surface of the carbide drill bit body and cutting teeth to reduce the adhesion of rock cuttings and prevent the formation of mud pockets.
It effectively prevents mud bag formation, reduces rotational resistance, extends drill bit life, and improves drilling efficiency.
Smart Images
Figure CN223549213U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering exploration drilling technology, specifically a biomimetic cemented carbide drill bit for engineering exploration that prevents mud buildup. Background Technology
[0002] In existing technologies, when engineering exploration cemented carbide drill bits drill into clay layers, shale and other soft mudstone formations, easily absorbing and swelling formations, or mixed soft and hard formations, the amount of rock cuttings is relatively large. These cuttings easily adhere to and gradually aggregate on the drill bit surface, blocking the water flow channels, reducing the cutting edge clearance, and forming mud bags. Mud bags significantly reduce the drill bit's drilling capacity and make it difficult to effectively cool the cutting teeth, accelerating tooth wear and leading to a decrease in drilling speed and a shortened drill bit lifespan. When mud bags are severe, the drill bit has virtually no drilling capacity, significantly reducing drilling efficiency and increasing drilling costs. Biomimetic non-smooth surface structures have the properties of drag reduction, viscosity reduction, and wear resistance. By machining the steel body and cutting tooth surfaces of engineering exploration cemented carbide drill bits into non-smooth surface structures with concave-convex and groove structures, the adhesion of rock cuttings to the drill bit can be reduced, mud bag formation can be prevented, and the rotational resistance during drilling can be reduced, thus increasing the drill bit life. Therefore, a mud bag-resistant biomimetic cemented carbide drill bit for engineering exploration is proposed. Summary of the Invention
[0003] The purpose of this invention is to provide a biomimetic cemented carbide drill bit for engineering exploration that prevents mud buildup, in order to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A biomimetic carbide drill bit for mud-proof engineering exploration includes a carbide drill bit body, the lower end of which has threads for connection with a core tube, and evenly distributed carbide cutting teeth welded onto the carbide drill bit body. The inner and outer surfaces of the carbide drill bit body have a biomimetic non-smooth structure, which is composed of several irregularly arranged concave and convex shapes in a plum blossom pattern.
[0006] The rock-breaking surface of the carbide cutting teeth has a grooved biomimetic non-smooth structure. This grooved biomimetic non-smooth structure can effectively reduce the adhesion between the carbide drill bit and the rock cuttings, thus preventing the formation of mud pockets.
[0007] The biomimetic non-smooth structural dimensions of the carbide drill bit body and the grooved biomimetic non-smooth structural dimensions of the carbide cutting teeth are determined based on the physical and mechanical properties of the formation and the particle size.
[0008] The working principle of this utility model is as follows:
[0009] In use, the carbide drill bit body is connected to the core tube of the drill string via a threaded connection, and the drill bit body is driven by the drilling rig power to rotate and drill. Carbide cutting teeth are used for fragmented drilling of the formation. During drilling, as the cuttings pass over the carbide cutting teeth and the carbide drill bit body, the biomimetic non-smooth surfaces of these structures prevent the drill bit from adhering to the cuttings. The cuttings are smoothly carried away from the bottom of the hole by the flushing fluid, avoiding the formation of mud bags on the drill bit and extending its service life.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] The biomimetic non-smooth structure of the carbide drill bit body and the grooved biomimetic non-smooth structure of the carbide cutting teeth of this utility model have the properties of drag reduction, viscosity reduction and wear resistance. They can reduce the adsorption of rock cuttings by the drill bit, prevent mud packing, reduce the rotational resistance of drilling, and extend the service life of the drill bit. Attached Figure Description
[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention;
[0013] Figure 2 This is a schematic diagram of the connection structure between the carbide cutting teeth and the steel body of this utility model.
[0014] Figure 3 This is a schematic diagram of the non-smooth biomimetic structure of the carbide cutting tooth groove of this utility model.
[0015] In the diagram: 1-Carbide drill bit body; 2-Carbide cutting teeth; 3-Concave and convex parts; 4-Thread. Detailed Implementation
[0016] Please see Figure 1 , Figure 2 and Figure 3 As shown, a biomimetic carbide drill bit for mud-proof engineering exploration includes a carbide drill bit body 1. The lower end of the carbide drill bit body 1 has a thread 4 for connection with a core tube. The carbide drill bit body 1 is welded with evenly distributed carbide cutting teeth 2. The inner and outer surfaces of the carbide drill bit body 1 have a biomimetic non-smooth structure, which is composed of a number of concave and convex bodies 3 arranged in a regular plum blossom pattern.
[0017] The rock-breaking surface of the carbide cutting tooth 2 has a groove-like biomimetic non-smooth structure. The groove-like biomimetic non-smooth structure can effectively reduce the adhesion between the carbide drill bit and the rock cuttings, and avoid the formation of mud pockets.
[0018] The biomimetic non-smooth structural dimensions of the carbide drill bit body 1 and the grooved biomimetic non-smooth structural dimensions of the carbide cutting teeth are determined based on the physical and mechanical properties of the formation and the particle size.
[0019] The working principle of this embodiment is as follows:
[0020] In use, the carbide drill bit body 1 is connected to the core tube of the drill bit via a threaded connection, and the carbide drill bit body 1 is driven to rotate and drill by the power of the drilling rig. The carbide cutting teeth 2 are used to perform fragmented drilling into the formation. During the drilling process, when the rock cuttings pass through the carbide cutting teeth 2 and the carbide drill bit body 1, because the surfaces of these structures are biomimetic non-smooth structures, the drill bit and rock cuttings do not stick together. The rock cuttings can be smoothly carried away from the bottom of the hole by the flushing fluid, avoiding the formation of mud bags on the drill bit and extending the service life of the drill bit.
Claims
1. A biomimetic carbide drill bit for mud-proof engineering surveys, comprising a carbide drill bit body (1), the lower end of the carbide drill bit body (1) having a thread (4), and evenly distributed carbide cutting teeth (2) welded onto the carbide drill bit body (1), characterized in that: The inner and outer surfaces of the carbide drill bit steel body (1) have a biomimetic non-smooth structure, which is composed of a number of concave and convex bodies (3) arranged in a regular plum blossom pattern.
2. The biomimetic cemented carbide drill bit for anti-mud-packing engineering exploration according to claim 1, characterized in that: The rock-breaking surface of the cemented carbide cutting tooth (2) has a groove-like biomimetic non-smooth structure.