Hydraulic anti-jamming drill bit

Abstract

The utility model relates to a hydraulic anti-jamming drill bit, and belongs to the technical field of drill bits, the hydraulic anti-jamming drill bit comprises a drill bit body, the drill bit body comprises a blade, a gauge protection section is arranged on the blade, and flow guide grooves used for cleaning rock debris are formed in the side wall of any one side or two sides of the gauge protection section of the blade; the special-shaped connecting slope with the smaller area can be formed at the gauge protection tail end by forming the flow guide groove, under hydraulic flushing of the chip removal grooves in front of and behind the cutter wings, a large number of falling blocks and rock debris possibly staying on the gauge protection section originally can be flushed and returned upwards, and the situation that the rock debris is prone to accumulation due to the fact that the area of the special-shaped connecting slope is too large is avoided; and the height of the flow guide grooves does not exceed the initial position of the gauge protection section, the situation that the structural strength of the cutter wings is reduced due to the fact that the structural strength of the cutter wings is damaged is avoided, and the flow guide grooves are formed for removing rock debris at the special-shaped connecting slope surface and the gauge protection section.

Description

Technical Field

[0001] The present application relates to the technical field of drill bits, and in particular to a hydraulic anti-stuck drill bit. Background Art

[0002] At present, drilling bits including PDC teeth as gauge teeth are widely used in the fields of petroleum, geology, etc. PDC drill bits have the advantages of high mechanical penetration rate and long drill bit footage life. During the drilling process, some formations are unstable, and the well wall is prone to falling blocks and falling to the bottom of the well, such as the Permian, dolomite and other ancient broken formations; in soft formations, the well wall is easy to shrink, and the piston is easy to pull out during the drilling process; and in horizontal drilling, the mud is not easy to carry away the cuttings cut by the PDC drill bit.

[0003] The above formations and working conditions are prone to drill bit sticking problems. The reason is that the fallen pieces and rock cuttings are easily accumulated on the drill bit diameter slope and quickly expand to the chip groove space, causing the entire root of the drill bit to be gradually covered by the fallen pieces. During the process of lifting the drill bit, it is very easy for the drill bit to get stuck, resulting in drilling jam accidents. Therefore, how to effectively and quickly move the fallen pieces and rock cuttings to avoid drill jam accidents is one of the drilling problems that need to be urgently solved. Summary of the invention

[0004] The embodiment of the present application provides a hydraulic anti-stuck drill bit to solve the problem in the related art that the existing drill bits are prone to accumulate debris and rock chips on the diameter-protected slope surface, and quickly expand to the chip groove space, causing the entire root of the drill bit to be gradually covered by debris, which can easily cause the drill bit to get stuck during the process of lifting the drill bit, resulting in drilling jam accidents.

[0005] A first aspect of an embodiment of the present application provides a hydraulic anti-stuck drill bit, comprising:

[0006] A drill body, the drill body comprising a blade, and the blade is provided with a gauge protection section;

[0007] A guide groove for cleaning rock cuttings is provided on the side wall of any one side or both sides of the gauge section of the blade.

[0008] In some embodiments, a surface of the gauge-guarding section inlaid with gauge-guarding teeth is a gauge-guarding surface;

[0009] The angle between the guide groove and the longitudinal center plane of the diameter protection surface is α;

[0010] The included angle between the guide groove and the axis of the drill body is β.

[0011] In some embodiments, the depth of the guide groove gradually increases from one end close to the handle to one end of the special-shaped connecting slope.

[0012] In some embodiments, the guide groove is connected and communicated with the special-shaped connecting slope;

[0013] The opening direction of the guide groove is perpendicular to the special-shaped connecting slope surface.

[0014] In some embodiments, the side wall of any one or both sides of the guide groove and away from the groove bottom is arranged in a curved surface;

[0015] The guide groove is a straight groove or a curved groove.

[0016] In some embodiments, the diameter of the inlet of the guide groove is smaller than the diameter of the outlet.

[0017] In some embodiments, transition curved surfaces are provided on both sides of the diameter-preserving section;

[0018] The transition curved surface includes a convex curved surface, a flat surface and a concave curved surface.

[0019] In some embodiments, the plane is disposed below the convex curved surface and connected thereto, and the plane and the convex curved surface are both connected to the diameter-protecting surface on a side away from the chip removal groove;

[0020] The concave curved surface is arranged on a side of the plane close to the chip removal groove and connected thereto.

[0021] In some embodiments, the transition curved surface located on one side of the guide groove includes a convex curved surface and a flat surface.

[0022] A second aspect of an embodiment of the present application provides a hydraulic anti-stuck drill bit, comprising:

[0023] A drill body, the drill body comprising a blade, and the blade is provided with a gauge protection section;

[0024] The side of the gauge-guarding section inlaid with gauge-guarding teeth is a gauge-guarding surface;

[0025] Any side of the gauge section is inclined, and a flow channel for flushing rock cuttings is formed between the gauge section and the handle;

[0026] The width of the cross section of the gauge-guarding section gradually decreases in a direction from the shank to the gauge-guarding surface.

[0027] The beneficial effects of the technical solution provided by this application include:

[0028] By setting the guide groove, when the drill bit is drilling, the water flow from the water outlet can flush the cuttings between the blade and the handle through the guide groove, avoiding the accumulation of cuttings in the chip groove between the blade and the handle and located at the gauge section, which may cause the drill to get stuck.

[0029] By opening the guide groove, a smaller special-shaped connecting slope is formed at the end of the gauge protection section. Through the hydraulic flushing of the chip removal grooves before and after the blade, a large number of loose blocks and cuttings that may have stayed in the gauge protection section can be flushed and returned, avoiding the special-shaped connecting slope with too large an area, which will lead to the narrowing of the chip removal flow channel and the reduction of chip removal efficiency, thereby avoiding drill jamming accidents.

[0030] The height of the guide groove does not exceed the starting position of the gauge section to avoid damaging the structural strength of the blade, resulting in a reduction in the structural strength of the blade. The guide groove is opened to remove rock cuttings at the gauge section.

[0031] Moreover, the guide groove is opened with the special-shaped connecting slope as the end starting point, which can also maintain the area of ​​the diameter protection surface and avoid the reduction of the diameter protection surface area, which causes the structural strength of the blade to change, thereby improving the chip removal efficiency and maintaining the structural strength.

[0032] The guide groove can be located on any one side or both sides of the blade. When it is located on the side of the blade facing the cutting surface, the water flow from the water outlet will be flushed into the guide groove when the drill bit rotates and discharges water. The opening of the guide groove increases the flushing channel, and the flow rate is increased by utilizing the slot setting to improve the impact on the rock cuttings, which can better drive the removal of rock cuttings and avoid accumulation and drill jamming. When it is located on the back side of the blade, that is, the side not facing the cutting surface, the water flow rate of the water outlet is also sufficient to impact the guide groove, realizing the same principle to drive the removal of rock cuttings.

[0033] Guide grooves are also provided on both sides of the blade, so that the area of ​​the special-shaped connecting slope is further reduced and the chip removal efficiency on both sides of the blade is improved. By providing guide grooves on both sides, the side of the blade facing the cutting surface and the side of the blade away from the cutting surface can be guided, and the area of ​​the special-shaped connecting slope is further reduced, so that the special-shaped connecting slope reduces the obstruction of rock chips, and the chip removal efficiency of the special-shaped connecting slope is further improved. The rock chips accumulated on both sides of the blade can also be accelerated to be removed through the guide grooves to avoid accumulation.

[0034] Any side of the gauge section is inclined, and a flow channel for flushing rock cuttings is formed between the gauge section and the shank. The width of the cross section of the gauge section gradually decreases in the direction from the shank to the gauge surface.

[0035] By changing the overall thickness of the blade, the width of the chip groove is widened, the chip removal efficiency is increased, and the area of ​​the special-shaped connecting slope is reduced, so that a special-shaped connecting slope with a smaller area is formed at the end of the diameter protection section. Through the hydraulic flushing of the chip grooves before and after the blade, a large number of loose blocks and rock chips that may have stayed in the diameter protection section can be flushed and returned, avoiding the special-shaped connecting slope with a reduced area, which will lead to the narrowing of the chip removal flow channel and the reduction of chip removal efficiency, thereby avoiding drill jamming accidents.

[0036] By means of the inclined setting, the position of the concave curved surface on one side of the gauge-keeping section forms a cleaning channel, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A first structural diagram provided for an embodiment of the present application;

[0039] Figure 2 A second structural diagram provided for an embodiment of the present application;

[0040] Figure 3 A third structural diagram provided for an embodiment of the present application;

[0041] Figure 4 For this application Figure 1 A schematic diagram of the cross section provided by the Zhongbao diameter section;

[0042] Figure 5 For this application Figure 2 A schematic diagram of the cross section provided by the Zhongbao diameter section;

[0043] Figure 6 For this application Figure 3 A schematic diagram of the cross section provided by the Zhongbao diameter section;

[0044] Figure 7 This is a schematic diagram of the structure of the guide groove provided in the embodiment of the present application.

[0045] 1. Drill body; 2. Blade; 3. Shank; 4. Gauge-protecting teeth; 6. Gauge-protecting section; 7. Special-shaped connecting slope; 8. Transition curved surface; 10. Guide groove; 11. Convex curved surface; 12. Plane; 13. Concave curved surface; 14. Gauge-protecting surface; 15. Chip removal groove. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] The embodiment of the present application provides a hydraulic anti-stuck drill bit, which can solve the problem that the existing drill bits are prone to accumulate debris and rock chips on the diameter-protected slope surface, and quickly expand to the chip groove space, causing the entire root of the drill bit to be gradually covered by the debris, which can easily cause the drill bit to get stuck during the process of lifting the drill bit, resulting in drilling jam accidents.

[0048] See also Figure 1-2 and Figure 4-5 As shown, the first aspect of the embodiment of the present application provides a hydraulic anti-sticking drill bit, comprising:

[0049] The drill bit body 1 comprises a blade 2, on which a gauge section 6 is arranged, and on the side wall of any one side or both sides of the gauge section 6 of the blade 2, a guide groove 10 for cleaning rock cuttings is provided.

[0050] The drill body 1 includes a shank 3, a plurality of blades 2 arranged at equal intervals around the center line of the shank 3, a chip removal groove 15 opened between the blades 2 and the shank 3, and a water outlet hole arranged between every two blades 2 and opened on the shank 3.

[0051] By setting the guide groove 10, when the drill bit is drilling, the water flow from the water outlet can flush the cuttings between the blade 2 and the handle 3 through the guide groove 10, avoiding the accumulation of cuttings in the chip groove 15 located between the blade 2 and the handle 3 and at the gauge section 6, which may cause drill sticking.

[0052] By providing the guide groove 10, a smaller special-shaped connecting slope 7 is formed at the end of the gauge protection section. Through the special-shaped connecting slope 7 with reduced area, a large number of loose blocks and rock chips that may have stayed in the gauge protection section 6 can be washed away and returned under the hydraulic flushing of the chip removal grooves 15 before and after the blade 2, thereby avoiding the special-shaped connecting slope 7 with a large area, which will lead to a narrow chip removal channel and a reduction in chip removal efficiency, thereby avoiding drill jamming accidents.

[0053] The height of the guide groove 10 does not exceed the starting position of the gauge section 6 to avoid damaging the structural strength of the blade 2, resulting in a decrease in the structural strength of the blade 2. The guide groove 10 is opened to remove rock debris at the gauge section 6 and the special-shaped connecting slope 7.

[0054] Moreover, the guide groove 10 is opened with the special-shaped connecting slope surface 7 as the end starting point, and the area of ​​the diameter-protecting surface 14 can be maintained to avoid the area reduction of the diameter-protecting surface 14, which causes the structural strength of the blade 2 to change, further improves the chip removal efficiency, and maintains the structural strength.

[0055] The guide groove 10 can be located on either side of the blade 2. When it is located on the side of the blade 2 facing the cutting surface, water from the water outlet will flow out when the drill bit rotates, and the water will be flushed into the guide groove 10. By opening the guide groove 10, the flushing channel is increased, and the flow rate is increased by using the groove setting to improve the impact on the rock cuttings, which can better drive the removal of rock cuttings and avoid accumulation and jamming of the drill. When it is located on the back side of the blade 2, that is, the side not facing the cutting surface, the water flow rate of the water outlet is also sufficient to impact the guide groove 10, realizing the same principle to drive the removal of rock cuttings.

[0056] Guide grooves 10 are also provided on both sides of the blade 2, so that the area of ​​the special-shaped connecting slope 7 is further reduced, and at the same time the chip removal efficiency on both sides of the blade 2 is improved. By providing guide grooves 10 on both sides, the side of the blade 2 facing the cutting surface and the side of the blade 2 away from the cutting surface can be guided, and the area of ​​the special-shaped connecting slope 7 is further reduced, so that the special-shaped connecting slope 7 reduces the obstruction of rock chips, and the chip removal efficiency of the special-shaped connecting slope 7 is further improved, and the rock chips accumulated on both sides of the blade 2 can also be accelerated through the guide grooves 10 to avoid accumulation.

[0057] The front cutting surface refers to the side of the blade 2 in the drill bit facing the rotation direction, and the back surface refers to the side of the blade 2 away from the rotation direction of the drill bit.

[0058] In this embodiment, the blade 2 is preferably on the side facing the cutting surface. When the blade 2 rotates, the rock chips will more easily accumulate on the side facing the cutting surface due to the impact force and inertia of the rotation. At this time, the area of ​​the special-shaped connecting slope 7 can be reduced through the guide groove 10, so that the rock chips can be discharged quickly.

[0059] According to the design of this solution, the area of ​​the special-shaped connecting slope 7 of the present application can be made 50% smaller than the area of ​​the special-shaped connecting slope 7 in the prior art.

[0060] In some optional embodiments, see Figure 1 As shown, in the hydraulic anti-sticking drill bit, the side of the gauge section 6 inlaid with the gauge teeth 4 is the gauge surface 14, the angle between the guide groove 10 and the longitudinal center plane of the gauge surface 14 is α, and the angle between the guide groove 10 and the axis of the drill body 1 is β.

[0061] In this embodiment, the depth of the guide groove 10 gradually increases from one end close to the handle 3 to one end of the special-shaped connecting slope 7, wherein the angle α in this embodiment is preferably 0°-45°, and the angle β is preferably 0°-60°.

[0062] By setting the angle α between the guide groove 10 and the longitudinal center plane of the diameter protection surface 14, the groove depth of the guide groove 10 gradually deepens from the end close to the handle 3 to the end of the special-shaped connecting slope 7. In the present embodiment, when the guide groove 10 is opened with the special-shaped connecting slope 7 as the starting point, it is not directly opened in the vertical angle direction, but is opened at an angle α. The angle α makes the groove depth of the guide groove 10 not the same depth, so that the depth of the guide groove 10 close to the water outlet is less than the depth of the special-shaped connecting slope 7.

[0063] The guide groove 10 is formed with the special-shaped connecting slope 7 as the end. By setting the axial angle β between the guide groove 10 and the drill body 1, the orientation of the guide groove 10 can be set in different directions. The value of the angle β can be set according to the angle of impact of the water outlet during on-site construction combined with the angle of the special-shaped connecting slope 7, so that the water flow from the water outlet can quickly enter the guide groove 10.

[0064] By continuously deepening the depth of the guide groove 10, the flow velocity of the water flow increases continuously when flushing the rock chips along the guide groove 10, and the flushing area and the amount of rock chips carried increase continuously. The deeper groove depth setting improves the chip removal efficiency of the chip removal end of the guide groove 10, avoids the accumulation of rock chips in the guide groove 10, and speeds up the chip removal efficiency of the guide groove 10.

[0065] In some optional embodiments, see Figure 1 and Figure 2 As shown, in the hydraulic anti-sticking drill bit, the opening direction of the guide groove 10 is perpendicular to the special-shaped connecting slope surface 7, and the guide groove 10 is connected and communicated with the special-shaped connecting slope surface 7.

[0066] When the guide groove 10 is opened, it takes the special-shaped connecting slope 7 as the starting point and is opened in a direction perpendicular to the special-shaped connecting slope 7 until it reaches the starting position of the gauge section 6. The height of the guide groove 10 does not exceed the starting position of the gauge section 6 to avoid damaging the structural strength of the blade 2, resulting in a decrease in the structural strength of the blade 2. The guide groove 10 is first opened to reduce the area of ​​the special-shaped connecting slope 7, reduce the obstruction of the special-shaped connecting slope 7 to rock chips, and speed up the chip removal of the special-shaped connecting slope 7.

[0067] By directly opening the guide groove 10 with the special-shaped connecting slope 7 as the end starting point, the area of ​​the special-shaped connecting slope 7 can be reduced during opening, so as to avoid the area of ​​the special-shaped connecting slope 7 being too large, resulting in the obstruction of rock chips in the chip removal path, causing rock chips to accumulate and the drill bit to get stuck.

[0068] Moreover, the guide groove 10 is opened with the special-shaped connecting slope surface 7 as the end starting point, and the area of ​​the diameter-protecting surface 14 can be maintained, thereby avoiding a reduction in the area of ​​the diameter-protecting surface 14, which would cause a change in the structural strength of the blade 2, thereby improving the chip removal efficiency and maintaining the structural strength.

[0069] In some optional embodiments, see Figure 1-2 and Figure 4-5 As shown, in the hydraulic anti-stuck drill bit, any one side or both sides of the guide groove 10 and the side wall at one end away from the groove bottom are arranged in a curved surface. The guide groove 10 can preferably be a straight groove or a curved groove, but is not limited to a straight groove and a curved groove. By setting grooves of different shapes, the flow path of the guide groove 10 can be changed, and the optimal chip removal path in actual conditions is used as the flow path of the guide groove 10. The straight groove can speed up the chip removal speed, and the curved groove can carry rock chips from more positions, and the impact on rock chips in more positions drives chip removal.

[0070] By providing a curved surface at the connection between any one or both sides of the guide groove 10 and the side wall of the blade 2, or at the connection with the handle 3, the impact resistance toward the position close to the blade 2 can be reduced when the water flows through the guide groove 10, and the impact toward the chip groove 15 of the handle 3 can be reduced, so that the rock chips can be easily flushed out and cleaned, and it is avoided that the height of the guide groove 10 close to the blade 2 is too high, or the height of the side close to the handle 3 is too high, which makes it difficult for the water flow to clean other side wall positions of the blade 2 and to assist in cleaning the chip groove 15. It is also easy for the rock chips to be confined in the slot of the guide groove 10, resulting in a small flow area, which causes self-restriction and is difficult to discharge, resulting in blockage.

[0071] The curved surface can make the flushing water in the guide groove 10 flow over the guide groove 10, and the flushing flow rate will not change, thereby reducing the flushing of the side wall of the blade 2 or other parts such as the chip groove 15, thereby reducing the accumulation of rock chips.

[0072] In some optional embodiments, see Figure 1-2 and Figure 7 As shown, in the hydraulic anti-sticking drill bit, the inlet diameter of the guide groove 10 is smaller than the outlet diameter, so that the guide groove 10 is frustum-shaped, the water flow in the guide groove 10 is smoother, the cleaning area is increased, and the cleaning is more uniform.

[0073] In some optional embodiments, see Figure 1-2 As shown, in the hydraulic anti-sticking drill bit, transition curved surfaces 8 are provided on both sides of the diameter-protecting section 6 .

[0074] In this embodiment, the transition curved surface 8 includes a convex curved surface 11 , a flat surface 12 and a concave curved surface 13 .

[0075] In this embodiment, the plane 12 is disposed below the convex surface 11 and connected thereto, and the plane 12 and the convex surface 11 are both connected to the diameter-protecting surface 14 on the side away from the chip removal groove 15;

[0076] The concave surface 13 is disposed on a side of the plane 12 close to the chip removal groove 15 and connected thereto.

[0077] A transition curved surface 8 is provided within 0 mm-100 mm from the starting position of the gauge section 6, preferably at 30 mm in this embodiment, so that the convex curved surface 11, the concave curved surface 13 and the plane 12 form a streamline shape, making chip removal smoother.

[0078] In some optional embodiments, see Figure 1 As shown, in the hydraulic anti-sticking drill bit, the transition curved surface 8 located on one side of the guide groove 10 includes a convex curved surface 11 and a flat surface 12.

[0079] In this embodiment, the side of the blade 2 where the guide groove 10 is opened is only provided with a plane 12 and a convex curved surface 11, and the concave curved surface 13 is opened as the guide groove 10. The side of the blade 2 away from the guide groove 10 is provided with a convex curved surface 11, a plane 12 and a concave curved surface 13. The transition curved surface 8 is used to form a streamline with the guide groove 10, so that the guide groove 10 replaces the concave curved surface 13, and the groove depth between the chip removal groove 15 and the blade 2 is increased, thereby further improving the cuttings removal efficiency.

[0080] See also Figure 3 and Figure 6 As shown, the second aspect of the embodiment of the present application provides a hydraulic anti-sticking drill bit, comprising:

[0081] The drill body 1 comprises a blade wing 2, on which a gauge-guarding section 6 is arranged, and one side of the gauge-guarding section 6 inlaid with the gauge-guarding teeth 4 is a gauge-guarding surface 14;

[0082] Any side of the gauge section 6 is inclined, and a flow channel for flushing rock cuttings is formed between the gauge section 6 and the shank 3 . The width of the cross section of the gauge section 6 gradually decreases in the direction from the shank 3 to the gauge surface 14 .

[0083] By changing the overall thickness of the blade 2, the width of the chip groove 15 is widened, the chip removal efficiency is increased, and the area of ​​the special-shaped connecting slope 7 is reduced, so that a special-shaped connecting slope 7 with a smaller area is formed at the end of the diameter protection section. Through the special-shaped connecting slope 7 with a reduced area, a large amount of fallen blocks and rock chips that may originally stay in the diameter protection section 6 can be washed away and returned under the hydraulic flushing of the chip grooves 15 before and after the blade 2, thereby avoiding the area of ​​the special-shaped connecting slope 7 being too large, which may cause easy accumulation of rock chips and cause drill sticking accidents.

[0084] By means of the inclined setting, the position of the concave curved surface 13 on one side of the gauge-keeping section 6 forms a cleaning channel, thereby improving the cleaning efficiency.

[0085] In some optional embodiments, see Figure 3 As shown, in the hydraulic anti-sticking drill bit, transition curved surfaces 8 are provided on both sides of the diameter-protecting section 6 .

[0086] In this embodiment, the transition curved surface 8 includes a convex curved surface 11 , a flat surface 12 and a concave curved surface 13 .

[0087] In this embodiment, the plane 12 is disposed below the convex surface 11 and connected thereto, and the plane 12 and the convex surface 11 are both connected to the diameter-protecting surface 14 on the side away from the chip removal groove 15;

[0088] The concave surface 13 is disposed on a side of the plane 12 close to the chip removal groove 15 and connected thereto.

[0089] A transition curved surface 8 is provided within 0 mm-100 mm from the starting position of the gauge section 6, preferably at 30 mm in this embodiment, so that the convex curved surface 11, the concave curved surface 13 and the plane 12 form a streamline shape, making chip removal smoother.

[0090] The working principle and process of this application are as follows:

[0091] By setting the guide groove 10, when the drill bit is drilling, the water flow from the water outlet can flush the cuttings between the blade 2 and the handle 3 through the guide groove 10, avoiding the accumulation of cuttings in the chip groove 15 located between the blade 2 and the handle 3 and at the gauge section 6, which may cause drill sticking.

[0092] By providing the guide groove 10, a smaller special-shaped connecting slope 7 is formed at the end of the gauge protection section. Through the special-shaped connecting slope 7 with reduced area, a large amount of loose blocks and rock chips that may originally stay in the gauge protection section 6 can be washed away and returned under the hydraulic flushing of the chip removal grooves 15 before and after the blade 2, thereby avoiding the special-shaped connecting slope 7 with a large area that causes easy accumulation of rock chips and causes drill sticking accidents.

[0093] The height of the guide groove 10 does not exceed the starting position of the gauge section 6 to avoid damaging the structural strength of the blade 2 and reducing the structural strength of the blade 2. The guide groove 10 is opened to remove rock debris from the gauge section 6 and the special-shaped connecting slope 7.

[0094] Moreover, the guide groove 10 is opened with the special-shaped connecting slope surface 7 as the end starting point, and the area of ​​the diameter-protecting surface 14 can be maintained, thereby avoiding a reduction in the area of ​​the diameter-protecting surface 14, which would cause a change in the structural strength of the blade 2, thereby improving the chip removal efficiency and maintaining the structural strength.

[0095] The guide groove 10 can be located on any one side or both sides of the blade 2. When it is located on the side of the blade 2 facing the cutting surface, the water flow from the water outlet will be flushed into the guide groove 10 when the drill bit rotates and discharges water. By opening the guide groove 10, the flushing channel is increased, and the flow rate is increased by using the groove setting to improve the impact on the rock cuttings, which can better drive the removal of rock cuttings and avoid accumulation and jamming of the drill. When it is located on the back side of the blade 2, that is, the side not facing the cutting surface, the water flow rate of the water outlet is also sufficient to impact the guide groove 10, realizing the same principle to drive the removal of rock cuttings.

[0096] Any side of the gauge section 6 is inclined, and a flow channel for flushing rock cuttings is formed between the gauge section 6 and the shank 3 . The width of the cross section of the gauge section 6 gradually decreases in the direction from the shank 3 to the gauge surface 14 .

[0097] By changing the overall thickness of the blade 2, the width of the chip groove 15 is widened, the chip removal efficiency is increased, and the area of ​​the special-shaped connecting slope 7 is reduced, so that a special-shaped connecting slope 7 with a smaller area is formed at the end of the diameter protection section. Through the special-shaped connecting slope 7 with a reduced area, a large amount of fallen blocks and rock chips that may originally stay in the diameter protection section 6 can be washed away and returned under the hydraulic flushing of the chip grooves 15 before and after the blade 2, thereby avoiding the area of ​​the special-shaped connecting slope 7 being too large, which may cause easy accumulation of rock chips and cause drill sticking accidents.

[0098] By means of the inclined setting, the position of the concave curved surface 13 on one side of the gauge-keeping section 6 forms a cleaning channel, thereby improving the cleaning efficiency.

[0099] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0100] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0101] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A hydraulic anti-stuck drill bit, characterized in that: include: A drill body (1), the drill body (1) comprising a blade (2), the blade (2) being provided with a gauge protection section (6); A guide groove (10) for cleaning rock cuttings is provided on the side wall of any one side or both sides of the gauge-keeping section (6) of the blade (2).

2. The hydraulic anti-stuck drill bit according to claim 1, characterized in that: The side of the gauge-guarding section (6) in which the gauge-guarding teeth (4) are embedded is a gauge-guarding surface (14); The included angle between the guide groove (10) and the longitudinal center plane of the diameter protection surface (14) is α; The included angle between the guide groove (10) and the axis of the drill body (1) is β.

3. The hydraulic anti-stuck drill bit according to claim 2, characterized in that: The depth of the guide groove (10) gradually increases from one end close to the handle (3) to one end of the special-shaped connecting slope (7).

4. The hydraulic anti-stuck drill bit according to claim 1, characterized in that: The guide groove (10) is connected and communicated with the special-shaped connecting slope surface (7); The direction in which the guide groove (10) is opened is perpendicular to the special-shaped connecting slope surface (7).

5. The hydraulic anti-stuck drill bit according to claim 1, characterized in that: The side wall of any one or both sides of the guide groove (10) and at one end away from the groove bottom is arranged in a curved surface; The guide groove (10) is a straight groove or a curved groove.

6. The hydraulic anti-stuck drill bit according to claim 1, characterized in that: The diameter of the inlet of the guide groove (10) is smaller than the diameter of the outlet.

7. The hydraulic anti-stuck drill bit according to claim 1, characterized in that: Transition curved surfaces (8) are provided on both sides of the diameter-preserving section (6); The transition curved surface (8) comprises a convex curved surface (11), a flat surface (12) and a concave curved surface (13).

8. The hydraulic anti-stuck drill bit according to claim 7, characterized in that: The plane (12) is arranged below the convex curved surface (11) and connected thereto, and the plane (12) and the convex curved surface (11) are both connected to the diameter-protecting surface (14) on the side away from the chip removal groove (15); The concave curved surface (13) is arranged on a side of the plane (12) close to the chip removal groove (15) and connected thereto.

9. The hydraulic anti-stuck drill bit according to claim 8, characterized in that: The transition curved surface (8) located on one side of the guide groove (10) comprises a convex curved surface (11) and a flat surface (12).

10. A hydraulic anti-stuck drill bit, characterized in that: include: A drill body (1), the drill body (1) comprising a blade (2), the blade (2) being provided with a gauge protection section (6); The side of the gauge-guarding section (6) inlaid with the gauge-guarding teeth (4) is a gauge-guarding surface (14); Any side of the gauge section (6) is inclined, and a flow channel for flushing rock debris is formed between the gauge section (6) and the handle (3); The width of the cross section of the gauge-keeping section (6) gradually decreases in the direction from the shank (3) to the gauge-keeping surface (14).

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