Long distance speed up drill

Abstract

The utility model relates to a kind of long-distance speed-up drilling tools, including inner sleeve and outer sleeve, the outer sleeve is sleeved on inner sleeve, the tail end of the inner sleeve is provided with drill rod joint, the front end of the outer sleeve is provided with drill bit;The gap of the front end of the inner sleeve and the front end of the outer sleeve will form a compression groove, the middle section of the inner sleeve is provided with limiting slot, the limiting block is set in the corresponding position of limiting slot in the outer sleeve, the upper and lower sides of the limiting block are provided with spring, it is set in limiting slot;Through the relative motion of inner sleeve and outer sleeve and the setting of compression groove, the effective management of drilling pressure and the optimized utilization of drilling fluid are realized, so as to improve the rock breaking efficiency of drill bit and overall drilling speed.

Description

Technical Field

[0001] This utility model relates to the field of drilling tool technology, and in particular to a long-distance speed-up drilling tool. Background Technology

[0002] In drilling technology, especially in deep drilling, increasing drilling speed faces significant technical challenges. As well depth increases, the difficulty of rock fracturing also increases due to the continuously rising in-situ stress on the rock. Traditional drilling methods, such as simply increasing the energy supplied from the surface (e.g., increasing drill pressure and rotational speed), often lead to severe drill string vibration. This not only significantly reduces drilling efficiency but can also cause serious safety accidents. Therefore, developing an innovative method for increasing drilling speed in deep drilling is crucial to overcoming these technical difficulties. This method needs to effectively increase drilling speed without increasing drill string vibration, while ensuring operational safety and efficiency. Utility Model Content

[0003] To overcome the shortcomings of the existing problems mentioned above, this utility model provides a long-distance speed-up drilling tool, which can effectively improve drilling efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a long-distance speed-up drilling tool, including an inner sleeve and an outer sleeve, the outer sleeve being sleeved on the inner sleeve, a drill pipe joint being provided at the tail end of the inner sleeve, and a drill bit being provided at the front end of the outer sleeve; a compression groove is formed by the gap between the front end of the inner sleeve and the front end of the outer sleeve, a limiting groove is provided in the middle section of the inner sleeve, a limiting block is provided at the corresponding position of the limiting groove on the outer sleeve, and springs are provided on the upper and lower sides of the limiting block, which are disposed in the limiting groove.

[0005] Preferably, multiple limiting grooves are provided and are arranged around the wall of the inner sleeve.

[0006] Preferably, a one-way valve is provided at the front end of the inner sleeve.

[0007] The beneficial effects of this utility model are: through the relative movement of the inner and outer casings and the setting of the compression groove, effective management of drilling pressure and optimized utilization of drilling fluid are achieved, thereby improving the rock-breaking efficiency of the drill bit and the overall drilling speed. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top-view sectional view of the inner sleeve. In the diagram, 1. Inner sleeve; 2. Outer sleeve; 3. Compression groove; 4. Limiting groove; 5. Limiting block; 6. Spring; 7. Check valve; 8. Drill pipe joint; 9. Drill bit. Detailed Implementation

[0010] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0011] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0012] according to Figures 1-2 As shown, a long-distance speed-up drilling tool includes an inner casing 1 and an outer casing 2. The outer casing 2 is fitted onto the inner casing 1. A drill pipe connector 8 is provided at the tail end of the inner casing 1, and a drill bit 9 is provided at the front end of the outer casing 2 for actual drilling work. The drill bit 9 is also provided with a channel for drilling fluid to enter and a nozzle for drilling fluid to spray out. A compression groove 3 is formed by the gap between the front end of the inner casing 1 and the front end of the outer casing 2. A limiting groove 4 is provided in the middle section of the inner casing 1, and the outer casing 2... A limiting block 5 is provided at the corresponding position of the limiting groove 4. Springs 6 are provided on the upper and lower sides of the limiting block 5. The inner sleeve 1 and the outer sleeve 2 are sleeved in the limiting groove 4, allowing the outer sleeve 2 and the inner sleeve 1 to move relative to each other. The setting of the limiting block 5 and the limiting groove 4 can limit the range of movement of the inner sleeve 1 and the outer sleeve 2, and prevent the inner sleeve 1 and the outer sleeve 2 from separating. The setting of the spring 6 can assist the extension and retraction of the inner sleeve 1 and the outer sleeve 2, and play a buffering role.

[0013] Multiple limiting grooves 4 are provided and are arranged around the wall of the inner sleeve 1.

[0014] The inner casing 1 is equipped with a one-way valve 7 at its front end. The function of the one-way valve 7 is to allow drilling fluid to flow smoothly into the drill bit 9, while preventing backflow and improving the pressurization effect.

[0015] During practical application, the drilling tool generates axial vibrations during drilling, causing the drilling pressure to increase or decrease. When the drilling pressure increases, the distance between the front end of the inner casing 1 and the front end of the outer casing 2 decreases, meaning the compression groove 3 is compressed. Simultaneously, the spring 6 is also compressed. When the inner casing 1 is compressed, the speed at which the front end of the inner casing 1 approaches the front end of the outer casing 2 is initially faster and then slower. When the moving speed of the inner casing 1 exceeds the speed at which the drilling fluid is ejected, the one-way valve 7 closes. At this time, the drilling fluid in the compression groove 3 and the spring 6 jointly bear the increase in drilling pressure, increasing the hydraulic pressure in the compression groove 3 and making the ejected drilling fluid more impactful. When the moving speed of the inner casing 1 is less than the speed at which the drilling fluid is ejected, the drilling fluid will be ejected normally. When the drilling pressure decreases, the compression groove 3 expands, allowing the drilling fluid to enter the compression groove 3. This causes the pressure in the compression groove 3 to be lower than the normal pressure, thus forming a periodically increasing and decreasing jet, i.e., a pulse jet. This pulse jet can help enhance the rock-breaking ability of the drill bit.

[0016] This ingenious design achieves effective management of drilling pressure and optimized utilization of drilling fluid through the relative movement of the inner and outer casings and the setting of compression grooves, thereby improving the rock-breaking efficiency of the drill bit and the overall drilling speed. The setting of compression grooves and springs can effectively reduce the axial vibration of the drill string, avoid axial collision between the drill bit and the formation, reduce drill bit wear, maintain drilling effect, and increase the drilling distance per cycle. The pulse jet can enhance the rock-breaking ability of the drill bit and improve drilling efficiency.

[0017] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A long distance speed up drill string, characterized by: It includes an inner sleeve (1) and an outer sleeve (2). The outer sleeve (2) is fitted onto the inner sleeve (1). The tail end of the inner sleeve (1) is provided with a drill pipe joint (8). The front end of the outer sleeve (2) is provided with a drill bit (9). The gap between the front end of the inner sleeve (1) and the front end of the outer sleeve (2) forms a compression groove (3). The middle section of the inner sleeve (1) is provided with a limiting groove (4). The outer sleeve (2) is provided with a limiting block (5) at the corresponding position of the limiting groove (4). The upper and lower sides of the limiting block (5) are provided with springs (6), which are located in the limiting groove (4).

2. A long distance speed up drill string as claimed in claim 1 wherein: The limiting groove (4) is provided in multiple ways and is arranged around the pipe wall of the inner sleeve (1).

3. A long distance speed up drill string as defined in claim 1, wherein: The inner sleeve (1) is provided with a one-way valve (7) at its front end.

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