Efficient inserted-tooth tricone bit

Abstract

The utility model provides an efficient insert tricone bit which comprises a connector, three bit legs, three cones and a plurality of cutting teeth, the three bit legs are circumferentially fixed at one end of the connector, and the plurality of cutting teeth are circumferentially distributed and embedded on the cones. The three cones are detachably and rotationally connected to the three cone palms in a one-to-one mode through fixing pieces respectively, and each fixing piece comprises a hollow column, a movable rod and two sliding blocks. An operator inserts the tooth wheel into the tooth palm through the hollow column, then rotates the movable rod through the thread to enable the sliding block to abut against the inner wall of the cavity of the tooth wheel, and on the contrary, the tooth wheel can be detached from the tooth palm, so that the tooth wheel is detachably connected to the tooth palm; when a certain cone is damaged in the using process, the damaged cone can be directly taken down to be replaced, so that the working efficiency and the maintenance efficiency are improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of drilling equipment, in particular to an efficient insert-tooth tricone bit. Background Art

[0002] The tricone bit is the main rock-breaking tool in oil and gas development engineering. When working, it breaks the formation rock in the ways of impact, crushing and shearing, and can be applicable to various formations, especially having unique advantages in drilling complex formation rocks.

[0003] At present, the conventional tricone bit on the market consists of three parts: a sub, legs and cones. This kind of bit is an integral non-detachable part. If a certain cone is damaged during use, the whole bit needs to be removed for repair, which is inconvenient for repair and has a high maintenance cost. Content of the Utility Model

[0004] This application provides an efficient insert-tooth tricone bit, which has the effect that the cones are detachably connected to the legs.

[0005] The efficient insert-tooth tricone bit provided by this application adopts the following technical solutions:

[0006] An efficient insert-tooth tricone bit includes a sub, three legs, three cones and a number of cutting teeth. The three legs are circumferentially fixed at one end of the sub, and the number of cutting teeth are circumferentially distributed and inlaid on the cones; the three cones are respectively detachably and rotatably connected to the three legs one by one through fixing members. The fixing members include a hollow column, a movable rod and two sliders. A through hole facing the cone is obliquely opened on the leg, and a cavity cooperating with the fixing member is opened on the leg;

[0007] The hollow column is fixedly arranged in the through hole, and one end of the hollow column penetrates through the leg and is used for inserting into the cavity; the movable rod is threadedly connected in the hollow column; a square groove perpendicular to the length direction of the hollow column is completely opened at one end of the hollow column facing the cone, and the two sliders are slidably arranged in the square groove, and the two sliders are respectively located on both sides of the movable rod; a chamfer is opened on the slider facing the movable rod, and a round chamfer is opened at one end of the movable rod facing the slider; when the movable rod moves towards the slider, the movable rod cooperates with the chamfer of the slider through the round chamfer to push the slider outwards towards the outside of the hollow column until it abuts against the inner wall of the cavity.

[0008] Through the above technical solution, the operator inserts the cone bit into the palm through the hollow column, and then rotates the movable rod through the thread to make the slider abut against the inner wall of the cavity of the cone bit. Conversely, the cone bit can be detached from the palm, so that the cone bit is detachably connected to the palm. When a certain cone bit is damaged during use, the damaged cone bit can be directly removed and replaced, thereby improving the work efficiency and maintenance efficiency and reducing the maintenance cost.

[0009] Preferably, there are also multiple groups of springs. One group of springs includes two springs located on both sides of the movable rod. The multiple groups of springs are sequentially arranged on the outer sides of the two sliders with both ends perpendicular to the length direction of the hollow column and always remain in a contracted state.

[0010] Through the above technical solution, the spring can make the slider automatically retract into the hollow column, and at the same time, it also has the effect of restricting the outward movement distance of the slider.

[0011] Preferably, a circular chamfer is provided on the surface of the slider that abuts against the cavity, and the surface of the cavity that abuts against the slider is arc-shaped.

[0012] Through the above technical solution, the design of the arc surface reduces the contact area between the slider and the cavity, thereby reducing the friction between the slider and the cavity and reducing the wear of the slider by the cone bit during self-rotation.

[0013] Preferably, there are also multiple lock beads. The cone bit and the palm also cooperate to form an annular cavity that surrounds the palm for one full week. There is also a bead inlet channel provided on the palm, and the bead inlet channel communicates with the annular cavity; the annular cavity is located in the lower inner part of the cone bit.

[0014] Through the above technical solution, after the cone bit is fixed to the palm by the fixing member, the lock beads are sent into the annular cavity through the bead inlet channel and surround the palm for one week; the lock beads play a role in further restricting the positional relationship between the cone bit and the palm, and at the same time, they can also reduce the friction between the cone bit and the palm during self-rotation, so as to reduce the wear of the cone bit and the palm.

[0015] Preferably, there are also three oil cavities and three oil inlet channels. The three oil cavities are respectively arranged in the three palms, and the oil cavities are used to store lubricating oil; the three oil inlet channels are respectively located in the three palms, one end of the oil inlet channel communicates with the oil cavity, and the other end communicates with the bead inlet channel; an oil inlet groove is provided at the end of the oil cavity away from the oil inlet channel, and the oil inlet groove completely penetrates the palm; there is also a first sealing cover, and the first sealing cover is threadedly connected to the oil inlet groove.

[0016] Through the above technical solution, the design of the oil cavity and the oil inlet channel is to facilitate supplementing the grease lubrication effect on the lock beads, so as to further reduce friction and wear, and consume the heat generated by rotational friction during work; at the same time, the operator can supplement lubricating oil into the oil cavity at any time by removing the first sealing cover.

[0017] Preferably, it further includes a plugging member, which includes a bolt seat, a rotating rod and a bolt. The bolt seat is inserted into the bead inlet channel, the bolt is threadedly connected to the bolt seat, a groove is formed at one end of the bolt seat facing the annular cavity, a rotating rod is hinged in the groove, and the end of the rotating rod facing the bolt is an arc surface; when the bolt moves into the groove, the bolt pushes the rotating rod to rotate through the arc surface end of the rotating rod and abuts against the inner wall of the bead inlet channel.

[0018] Through the above technical solution, the design of the plugging member abuts the lock beads in the annular cavity to prevent the lock beads from running out of the annular cavity; at the same time, the special design of the plugging member enables the operator to easily fix or move the plugging member in the bead inlet channel.

[0019] Preferably, the arc surface end of the rotating rod is arranged away from the oil inlet channel, and a chamfer is formed at the other end of the rotating rod facing the lock beads. When the rotating rod abuts against the bead inlet channel, the rotating rod is used to guide the flow direction of the lubricating oil; at the same time, a second sealing cover is hinged at one end of the bead inlet channel away from the annular cavity.

[0020] Through the above technical solution, the rotating rod also plays a role in guiding the lubricating oil, reducing the amount of lubricating oil that needs to be injected into the bead inlet channel; at the same time, the chamfer of the rotating rod is provided to allow the lubricating oil to fully lubricate the lock beads without affecting the position limitation of the lock beads.

[0021] Preferably, an oil guide pipe is further formed in the cutter hub, a guide groove is further formed on the hollow column, two ends of the oil guide pipe are respectively communicated with the guide groove and the oil cavity, and the guide groove is used to guide the lubricating oil between the cavity and the slider; a third sealing cover is further included, and the third sealing cover is threadedly connected to the through hole and abuts against one end of the fixing member away from the cone.

[0022] Through the above technical solution, when the operator operates the fixing member, a slight gap should be left between the slider and the cavity to facilitate the guide groove and the oil guide pipe to introduce the lubricating oil into the gap, reducing friction and the heat generated by friction.

[0023] The technical effects of the present utility model are mainly reflected in the following aspects:

[0024] 1. By designing the fixing member, the present utility model enables the damaged cone to be directly removed and replaced, thereby improving the work efficiency and maintenance efficiency and reducing the maintenance cost;

[0025] 2. By providing the oil cavity, the present utility model facilitates supplementing the grease lubrication effect on the lock beads and the slider;

[0026] 3. Through the special design of the plugging member, while limiting the position of the lock beads, the present utility model guides the lubricating oil to reduce the amount of lubricating oil that needs to be injected into the bead inlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 In the embodiment of the present application along Figure 1 is a schematic cross-sectional view taken along the A-A section line in;

[0029] Figure 3 In the embodiment of the present application Figure 2 is an enlarged schematic view at B;

[0030] Figure 4 In the embodiment of the present application along Figure 1 is a schematic cross-sectional view taken along the C-C section line in;

[0031] Figure 5 In the embodiment of the present application Figure 4 is an enlarged schematic view at D.

[0032] Reference numerals: 1, connector; 2, cone; 21, through hole; 211, third sealing cover; 22, bead inlet channel; 23, oil inlet channel; 24, oil guide pipe; 3, roller cone; 31, cavity; 4, cutting tooth; 5, fixing member; 51, hollow column; 511, square groove; 512, guide groove; 52, movable rod; 53, slider; 54, spring; 6, locking bead; 7, annular cavity; 8, oil cavity; 81, oil inlet groove; 82, first sealing cover; 9, plugging member; 91, bolt seat; 911, groove; 92, rotating rod; 93, bolt; 94, second sealing cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will further elaborate on the specific embodiments of the present invention in conjunction with the attached Figures 1-5 drawings, so that the technical solutions of the present invention are easier to understand and master.

[0034] An embodiment of the present application discloses an efficient insert-tooth tricone bit:

[0035] Referring to Figure 1 and Figures 4-5 , an efficient insert-tooth tricone bit includes a connector 1, three cones 2, three roller cones 3 and a plurality of cutting teeth 4. The three cones 2 are circumferentially fixed to one end of the connector 1, and the plurality of cutting teeth 4 are circumferentially distributed and embedded on the roller cones 3. The three roller cones 3 are respectively detachably and rotatably connected to the three cones 2 through fixing members 5. The fixing member 5 includes a hollow column 51, a movable rod 52 and two sliders 53. A through hole 21 inclined towards the roller cone 3 is formed in the cone 2, and a cavity 31 for cooperating with the fixing member 5 is formed in the cone 2.

[0036] The hollow column 51 is fixed within the through hole 21, and one end of the hollow column 51 penetrates through the cone 2 and is used for insertion into the cavity 31. The movable rod 52 is threadedly connected within the hollow column 51. A square groove 511 is completely formed through one end of the hollow column 51 facing the cone 3 in a direction perpendicular to the length direction of the hollow column 51. Two sliders 53 are slidably connected within the square groove 511, and the two sliders 53 are respectively located on both sides of the movable rod 52. The sliders 53 are provided with chamfers facing the movable rod 52, and the end of the movable rod 52 facing the sliders 53 is provided with a round chamfer; when the movable rod 52 moves towards the sliders 53, the movable rod 52 cooperates with the chamfers of the sliders 53 through the round chamfer to push the sliders 53 towards the outside of the hollow column 51 until they abut against the inner wall of the cavity 31.

[0037] The operator inserts the cone 3 into the cone 2 through the hollow column 51, and then rotates the movable rod 52 through threading so that the sliders 53 abut against the inner wall of the cavity 31 of the cone 3. Conversely, the cone 3 can be detached from the cone 2, so that the cone 3 is detachably connected to the cone 2; when a certain cone 3 is damaged during use, the damaged cone 3 can be directly removed and replaced, thereby improving the work efficiency and maintenance efficiency and reducing the maintenance cost.

[0038] Refer to Figures 4-5 , and further includes multiple groups of springs 54. One group of springs 54 includes two springs 54 located on both sides of the movable rod 52. The multiple groups of springs 54 are sequentially fixed on the outer sides of the two sliders 53 with both ends perpendicular to the length direction of the hollow column 51 and always remain in a contracted state. The springs 54 can enable the sliders 53 to automatically retract into the hollow column 51, and at the same time also have the effect of restricting the outward movement distance of the sliders 53.

[0039] Refer to Figures 4-5 , a round chamfer is provided on the surface of the slider 53 that abuts against the cavity 31, and the surface of the cavity 31 that abuts against the slider 53 is provided with an arc. The design of the arc surface reduces the contact area between the slider 53 and the cavity 31, thereby reducing the frictional force between the slider 53 and the cavity 31 and reducing the wear of the slider 53 during the rotation of the cone 3.

[0040] Refer to Figures 2-3 , and further includes multiple lock beads 6. The cone 3 and the cone 2 also cooperate to form an annular cavity 7 that surrounds the entire circumference of the cone 2. The cone 2 is also provided with a bead inlet channel 22, and the bead inlet channel 22 communicates with the annular cavity 7; the annular cavity 7 is located in the lower part within the cone 3. After the cone 3 is fixed to the cone 2 through the fixing member 5, the lock beads 6 are sent into the annular cavity 7 through the bead inlet channel 22 and surround the cone 2 for one week; the lock beads 6 play a role in further restricting the positional relationship between the cone 3 and the cone 2, and at the same time can also reduce the frictional force between the cone 3 and the cone 2 during the rotation of the cone 3, so as to reduce the wear of the cone 3 and the cone 2.

[0041] Refer to Figure 2, it further includes three oil cavities 8 and three oil inlet channels 23. The three oil cavities 8 are respectively arranged in the three palm pieces 2, and the oil cavities 8 are used to store lubricating oil; the three oil inlet channels 23 are respectively located in the three palm pieces 2. One end of the oil inlet channel 23 communicates with the oil cavity 8, and the other end communicates with the ball inlet channel 22; an oil inlet groove 81 is formed at one end of the oil cavity 8 away from the oil inlet channel 23, and the oil inlet groove 81 completely penetrates the palm piece 2; it further includes a first sealing cover 82, and the first sealing cover 82 is threadedly connected to the oil inlet groove 81. The designs of the oil cavity 8 and the oil inlet channel 23 are to facilitate the replenishment of the grease lubrication effect on the lock balls 6, so as to further reduce friction and wear, and consume the heat generated by rotational friction during work; at the same time, the operator can replenish the lubricating oil in the oil cavity 8 at any time by removing the first sealing cover 82.

[0042] Refer to Figures 2-3 , it further includes a plugging member 9. The plugging member 9 includes a bolt seat 91, a rotating rod 92 and a bolt 93. The bolt seat 91 is inserted into the ball inlet channel 22, the bolt 93 is threadedly connected to the bolt seat 91, a groove 911 is formed at one end of the bolt seat 91 facing the annular cavity 7, and a rotating rod 92 is hinged in the groove 911. One end of the rotating rod 92 facing the bolt 93 is an arc surface; when the bolt 93 moves into the groove 911, the bolt 93 pushes the rotating rod 92 to rotate and abut against the inner wall of the ball inlet channel 22 through the arc surface end of the rotating rod 92. The design of the plugging member 9 abuts the lock ball 6 in the annular cavity 7 to limit the situation where the lock ball 6 runs out of the annular cavity 7; at the same time, the special design of the plugging member 9 enables the operator to easily fix or move the plugging member 9 in the ball inlet channel 22.

[0043] Refer to Figures 2-3 , the arc surface end of the rotating rod 92 is arranged away from the oil inlet channel 23, and a chamfer is formed at the other end of the rotating rod 92 facing the lock ball 6. When the rotating rod 92 abuts against the ball inlet channel 22, the rotating rod 92 is used to guide the flow direction of the lubricating oil. At the same time, a second sealing cover 94 is hinged at one end of the ball inlet channel 22 away from the annular cavity 7. The rotating rod 92 also plays a role in guiding the lubricating oil, so as to reduce the amount of lubricating oil that needs to be injected into the ball inlet channel 22; at the same time, the formation of the chamfer of the rotating rod 92 can fully lubricate the lock ball 6 with the lubricating oil without affecting the position limitation of the lock ball 6.

[0044] Refer to Figures 4-5, an oil guide pipe 24 is also provided in the cone 2, and a guide groove 512 is also provided on the hollow column 51. Two ends of the oil guide pipe 24 are respectively communicated with the guide groove 512 and the oil cavity 8. The guide groove 512 is used to guide lubricating oil between the cavity 31 and the slider 53. A third sealing cover 211 is further included. The third sealing cover 211 is threadedly connected to the through hole 21, and the third sealing cover 211 abuts against one end of the fixing member 5 away from the roller 3. When operating the fixing member 5, the operator should leave a slight gap between the slider 53 and the cavity 31. After the slider 53 abuts against the cavity 31, the movable rod 52 is loosened a little in the opposite direction to facilitate the guide groove 512 and the oil guide pipe 24 to introduce the lubricating oil into the gap, reducing friction and heat generated by friction.

[0045] Of course, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A high-efficiency three-cone drill bit with inserted teeth, comprising a connector (1), three tooth palms (2), three cones (3) and a plurality of cutting teeth (4), wherein the three tooth palms (2) are circumferentially fixed on one end of the connector (1), and the plurality of cutting teeth (4) are circumferentially distributed and embedded on the cone (3); characterized in that: The three gears (3) are detachably and rotatably connected to the three tooth palms (2) through fixing members (5) one by one, the fixing members (5) comprising a hollow column (51), a movable rod (52) and two slide blocks (53), the tooth palm (2) is provided with a through hole (21) inclined toward the gear (3), and the tooth palm (2) is provided with a cavity (31) cooperating with the fixing member (5); The hollow column (51) is fixedly arranged in the through hole (21), one end of the hollow column (51) passes through the tooth palm (2) and is used to be inserted into the cavity (31); the movable rod (52) is threadedly connected in the hollow column (51); a square groove (511) perpendicular to the length direction of the hollow column (51) is completely penetrated on the end of the hollow column (51) facing the tooth wheel (3), and the two sliding blocks (53) are slidably arranged in the square groove (511). The sliders (53) are respectively located on both sides of the movable rod (52); the slider (53) is provided with a chamfer toward the movable rod (52); and the movable rod (52) is provided with a round chamfer at one end toward the slider (53); when the movable rod (52) moves toward the slider (53), the movable rod (52) pushes the slider (53) toward the outside of the hollow column (51) through the round chamfer and the chamfer of the slider (53) until it abuts against the inner wall of the cavity (31).

2. The high-efficiency three-cone drill bit with inserted teeth according to claim 1, characterized in that: It also includes multiple groups of springs (54), one group of springs (54) includes two springs (54) located on both sides of the movable rod (52), and the multiple groups of springs (54) are sequentially arranged on the outer sides of the two sliders (53) in a vertical direction of the length of the hollow column (51) at both ends, and are kept in a contracted state.

3. The high-efficiency three-cone drill bit with inserted teeth according to claim 1, characterized in that: A round chamfer is provided on one side of the slider (53) abutting against the cavity (31), and an arc is formed on one side of the cavity (31) abutting against the slider (53).

4. The high-efficiency three-cone drill bit with inserted teeth according to claim 1, characterized in that: It also includes a plurality of locking beads (6). The tooth wheel (3) and the tooth palm (2) cooperate to form an annular cavity (7) surrounding the tooth palm (2) for an entire circumference. The tooth palm (2) is also provided with a bead entry channel (22), and the bead entry channel (22) is connected to the annular cavity (7). The annular cavity (7) is located in the lower part of the tooth wheel (3).

5. The high-efficiency three-cone drill bit with inserted teeth according to claim 4, characterized in that: It also includes three oil chambers (8) and three oil inlet channels (23), wherein the three oil chambers (8) are respectively arranged in the three tooth palms (2), and the oil chambers (8) are used to store lubricating oil; the three oil inlet channels (23) are respectively located in the three tooth palms (2), and one end of the oil inlet channel (23) is connected to the oil chamber (8), and the other end is connected to the ball inlet channel (22); an oil inlet groove (81) is provided at one end of the oil chamber (8) away from the oil inlet channel (23), and the oil inlet groove (81) completely penetrates the tooth palm (2); and it also includes a first sealing cover (82), and the first sealing cover (82) is threadedly connected to the oil inlet groove (81).

6. The high-efficiency three-cone drill bit with inserted teeth according to claim 4, characterized in that: The invention also comprises a blocking member (9), wherein the blocking member (9) comprises a bolt seat (91), a rotating rod (92) and a bolt (93); the bolt seat (91) is inserted into the bead inlet channel (22); the bolt (93) is threadedly connected in the bolt seat (91); a groove (911) is provided at one end of the bolt seat (91) facing the annular cavity (7); a rotating rod (92) is hinged in the groove (911); and the end of the rotating rod (92) facing the bolt (93) is an arc surface; when the bolt (93) moves into the groove (911), the bolt (93) pushes the rotating rod (92) through the arc surface end of the rotating rod (92) to rotate and abut against the inside of the bead inlet channel (22).

7. The high-efficiency three-cone drill bit with inserted teeth according to claim 6, characterized in that: The arc surface end of the rotating rod (92) is arranged away from the oil inlet channel (23), and the other end of the rotating rod (92) is chamfered toward the locking ball (6). When the rotating rod (92) abuts against the ball inlet channel (22), the rotating rod (92) is used to guide the flow of lubricating oil; at the same time, a second sealing cover (94) is hingedly connected to one end of the ball inlet channel (22) away from the annular cavity (7).

8. The high-efficiency three-cone drill bit with inserted teeth according to claim 4, characterized in that: An oil guide pipe (24) is also provided in the tooth palm (2), and a guide groove (512) is also provided on the hollow column (51). The two ends of the oil guide pipe (24) are respectively connected to the guide groove (512) and the oil cavity (8), and the guide groove (512) is used to guide lubricating oil to between the cavity (31) and the slider (53); and a third sealing cover (211) is also included. The third sealing cover (211) is threadedly connected to the through hole (21), and the third sealing cover (211) is abutted against an end of the fixing member (5) away from the tooth wheel (3).

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