Helical tooth diamond bit

Abstract

The invention discloses a helical tooth diamond drill bit, which relates to the technical field of well drilling and comprises a diamond drill bit body and a drill rod, the diamond drill bit body is in threaded connection with the drill rod, a plurality of water spraying holes are formed in the bottom of the diamond drill bit body, and a mounting assembly is arranged between the diamond drill bit body and the drill rod. The mounting assembly comprises two limiting rings fixedly arranged on the inner side of the diamond bit body and the inner side of the drill rod correspondingly, and a first mounting frame is arranged in the diamond bit body. The diamond drill bit body is pulled through the steel wire rope, salvage operation of the diamond drill bit body is achieved, the step that special salvage equipment needs to be independently and additionally used is omitted, the diamond drill bit body is directly pulled through the steel wire rope, the salvage difficulty can be lowered, and the salvage time is shortened; and the influence of salvage of the diamond bit body on the drilling efficiency is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and more particularly to a spiral tooth diamond bit. Background Art

[0002] The spiral tooth diamond bit is one of the core tools in the current fields of geological drilling and oil and gas exploitation. Its core structure consists of diamond composite inserts and spiral cutting teeth. The traditional spiral tooth diamond bit breaks rocks through the continuous cutting action of the spiral teeth, and uses the chip discharge channel formed by the spiral grooves between the teeth to convey the cuttings upward. Moreover, due to the high hardness and wear resistance of the diamond composite inserts, it can adapt to complex formations such as hard rocks and gravel layers.

[0003] In actual drilling operations, there is a situation of bottom-hole cuttings accumulation. To discharge the cuttings from the well, currently, most of the drilling fluid is discharged at high speed from the nozzles of the bit, and the suspension state of the cuttings is maintained through the flow rate and viscosity. As the drilling fluid carrying the cuttings continuously increases, the cuttings are returned out of the well, that is, the drilling fluid gradually fills the well and then overflows the well, and the overflowing drilling fluid will carry the cuttings. When there are situations such as insufficient pre-tightening force of the threaded connection between the diamond bit and the drill pipe, or contamination of the connection mating surface, wear of the threads, long-term erosion of the connection by high-sand-content mud, and improper operation, etc., the connection between the bit and the drill pipe may become loose or even the bit may fall off. Currently, a special fishing tool for the bit is used for fishing, but before fishing for the bit, it is necessary to first clean the sediments in the well, use downhole camera equipment such as a probe to determine the position of the bit, and even require workers to go down the well for auxiliary fishing. The fishing process is time-consuming and laborious. Therefore, a spiral tooth diamond bit is proposed. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a spiral tooth diamond bit.

[0005] The technical solution is as follows: A spiral tooth diamond drill bit, a diamond drill bit body and a drill rod, the diamond drill bit body is threadedly connected to the drill rod, a plurality of water spray holes are provided at the bottom of the diamond drill bit body, a mounting assembly is provided between the diamond drill bit body and the drill rod, the mounting assembly comprises two groups of limit rings respectively fixedly arranged on the inner sides of the diamond drill bit body and the drill rod, a mounting frame 1 is provided inside the diamond drill bit body, a mounting frame 2 is provided inside the drill rod, a plurality of movable grooves are provided on the mounting frame 1 and the mounting frame 2, each movable groove is slidably connected with a limit block, a spring 1 is fixedly connected between the limit block and the adjacent movable groove, and also comprises a movable tube slidably arranged in the middle part of the mounting frame 1, a rotating tube 1 is rotatably connected inside the movable tube, a rotating tube 2 is rotatably connected on the mounting frame 2, a wire rope is fixedly connected between the rotating tube 1 and the rotating tube 2, a plurality of movable rods are fixedly connected at one end of the movable tube away from the mounting frame 1, the movable rods extend to pass through the mounting frame 1 and are slidably connected to the mounting frame 1, and a spring 2 is sleeved on the outer side of the movable rod.

[0006] Furthermore, the movable groove is configured to be L-shaped, and the shape of the limiting block is adapted to the shape of the movable groove.

[0007] Furthermore, each group of limiting rings is composed of two circular ring structures, a preset gap is left between the two circular ring structures of each group, and the limiting blocks are arranged corresponding to the limiting rings.

[0008] Furthermore, each limit block is fixedly connected to a dial plate.

[0009] Furthermore, a ball bearing is arranged between the outer surface of the rotating tube 1 and the inner surface of the movable tube, and a ball bearing is also arranged between the rotating tube 2 and the mounting frame 2. The two ends of the spring 2 are fixedly connected to the mounting frame 1 and the movable tube respectively.

[0010] Furthermore, a support assembly is also provided at one end of the movable rod passing through the mounting frame one, the support assembly includes a fixing frame, a plurality of movable rods passing through one end of the mounting frame one are commonly fixedly connected to a fixing frame, a plurality of rotating grooves are provided on the fixing frame, a fixed shaft is fixedly connected inside each rotating groove, a support rod one is rotatably connected on each fixed shaft, a plurality of limiting holes are provided on the mounting frame one, the number of limiting holes is the same as the number of support rods one, and the plurality of limiting holes are respectively arranged corresponding to the positions of the plurality of support rods one, a torsion spring is arranged between the support rod one and the adjacent rotating grooves, a support rod two is slidably connected inside each support rod one, a spring three is fixedly connected between the support rod one and the adjacent support rod two, and a plurality of resistance rods are fixedly connected to one end of the movable tube away from the mounting frame one, the number and positions of the resistance rods are arranged corresponding to the plurality of support rods two, and an end of each resistance rod away from the movable tube respectively resists the adjacent support rod two.

[0011] Further, an opening for the wire rope to move is provided in the middle of the fixing frame, and the groove wall on the side of the rotating groove away from the first rotating pipe is set as an inclined surface.

[0012] Further, a diversion assembly is provided on the diamond drill bit body. The diversion assembly includes a plurality of diversion shells fixedly connected to the outer side wall of the diamond drill bit body. Oblique holes are provided at positions corresponding to each diversion shell on the diamond drill bit body. The oblique holes are communicated with the adjacent water spraying holes, and the oblique holes are inclined.

[0013] As described above, the beneficial effects of the present invention are as follows: During the process of the drilling fluid being sprayed out from the water spraying holes, part of the drilling fluid is sprayed into the diversion shell through the oblique holes. Since the oblique holes are arranged obliquely upward, the drilling fluid sprayed out from the oblique holes can wash the soil or rock inside the diversion shell and directly push the soil or rock in the well upward. Through the upward spraying of the drilling fluid and the guiding action of the diversion shell, the cuttings can be better discharged from the well; The falling of the first mounting frame is buffered by the elastic action of the second spring, so that the tension on the wire rope gradually increases, preventing the wire rope from being instantaneously stressed too much and avoiding the wire rope from breaking; The diamond drill bit body is pulled by the wire rope to realize the fishing operation of the diamond drill bit body. Furthermore, the steps of separately using special fishing equipment additionally are reduced. Pulling the diamond drill bit body directly by the wire rope can reduce the fishing difficulty, reduce the fishing time, and reduce the influence of fishing the diamond drill bit body on the drilling efficiency; Through the abutting support of the second support rod, the diamond drill bit body can be stabilized, the shaking of the diamond drill bit body in the well can be reduced, the influence on fishing can be reduced, and the fishing efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 is a three-dimensional schematic diagram of components such as the limit ring, the first mounting frame, and the second mounting frame of the present invention; Figure 3 is a three-dimensional schematic diagram of components such as the first mounting frame, the fixing frame, and the wire rope of the present invention; Figure 4 is a three-dimensional schematic diagram of components such as the movable rod, the second spring, and the movable pipe of the present invention; Figure 5 is of the present invention Figure 4 the enlarged schematic diagram at A in; Figure 6 is of the present invention Figure 4 the enlarged schematic diagram at B in; Figure 7 is a three-dimensional schematic diagram of components such as the fixing frame and the first support rod of the present invention; Figure 8 For the present invention Figure 7 Schematic enlarged view of part C in the present invention; Figure 9 Schematic three-dimensional view of support rod 1, spring 3, and support rod 2 of the present invention; Figure 10 Schematic three-dimensional view of components such as the movable pipe, contact rod, and support rod 2 of the present invention.

[0015] Among them, the reference numerals in the present invention are as follows: 1, diamond bit body; 11, water spray holes; 3, drill pipe; 21, diversion shell; 22, inclined holes; 41, limiting ring; 42, mounting bracket 1; 421, mounting bracket 2; 43, movable slot; 44, spring 1; 45, limiting block; 46, dial; 51, movable pipe; 52, rotating pipe 1; 521, rotating pipe 2; 53, ball; 54, movable rod; 55, spring 2; 56, steel wire rope; 61, fixed bracket; 62, rotating slot; 63, fixed shaft; 64, support rod 1; 65, torsion spring; 66, support rod 2; 67, spring 3; 68, contact rod. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0017] The embodiments provided by the present invention will be elaborated in detail below: As Figure 1 and Figure 2 shown, a spiral-tooth diamond bit includes a diamond bit body 1 and a drill pipe 3. The top of the diamond bit body 1 is provided with external threads, the inside of the drill pipe 3 is hollow, and internal threads are provided on the inner wall of the drill pipe 3 close to the diamond bit body 1. The diamond bit body 1 and the drill pipe 3 can be threadedly connected through the cooperation of the external threads and the internal threads. A plurality of water spray holes 11 arranged in a circumferential array are opened at the bottom of the diamond bit body 1. A water tank is opened inside the diamond bit body 1 for injecting drilling fluid into the inside of the diamond bit body 1, and the drilling fluid can be discharged outward through the water spray holes 11, which can clean the diamond bit body 1 and reduce the wear of the diamond bit body 1 during drilling. A diversion assembly for guiding the discharge of sludge is provided on the diamond bit body 1; It should be noted that: The diamond drill bit body 1 and the drill pipe 3 are both prior arts. The drill pipe 3 can be connected to existing drilling equipment, and the drill pipe 3 is driven to rotate and move downward by the drilling equipment. In addition, the drilling fluid can be pumped by an external delivery pump, and the drilling fluid is pumped into the interior of the diamond drill bit body 1 through the delivery pump.

[0018] The diversion assembly includes a plurality of diversion shells 21 fixedly connected to the outer side wall of the diamond drill bit body 1 and arranged in a circumferential array. The diversion shells 21 are arranged in the chip removal channel on the outer side of the diamond drill bit body 1. Oblique holes 22 are formed at positions on the diamond drill bit body 1 corresponding to each diversion shell 21. The oblique holes 22 communicate with the adjacent water spray holes 11, and the oblique holes 22 are arranged to incline upward.

[0019] As Figures 2 to 5 shown, an installation assembly is provided between the diamond drill bit body 1 and the drill pipe 3. The installation assembly includes two groups of limiting rings 41 respectively fixedly arranged on the inner side walls of the diamond drill bit body 1 and the drill pipe 3. Each group of limiting rings 41 is composed of two unconnected circular ring structures. A preset gap is left between the two circular ring structures of each group. An installation frame one 42 is arranged inside the diamond drill bit body 1, and an installation frame two 421 corresponding to the installation frame one 42 is arranged inside the drill pipe 3. A plurality of activity slots 43 arranged in a circumferential array are formed on both the installation frame one 42 and the installation frame two 421. The activity slots 43 are arranged in an L shape. A limiting block 45 is slidably connected in each activity slot 43. The shape of the limiting block 45 is adapted to the shape of the activity slot 43. A first spring 44 is fixedly connected between the limiting block 45 and the wall of the adjacent activity slot 43. A dial 46 is fixedly connected to each limiting block 45.

[0020] As Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 and Figure 10 shown, the installation assembly further includes a movable pipe 51 slidably arranged in the middle of the installation frame one 42. A hole for the movable pipe 51 to pass through is arranged in the middle of the installation frame one 42. A rotating pipe one 52 is rotatably connected inside the movable pipe 51. A ball 53 is rollingly connected between the outer surface of the rotating pipe one 52 and the inner surface of the movable pipe 51. A plurality of movable rods 54 are fixedly connected in a circumferential array at one end of the movable pipe 51 away from the installation frame one 42. The movable rods 54 extend upward to pass through the installation frame one 42. Holes for the movable rods 54 to slide are formed on the installation frame one 42. A second spring 55 is sleeved on each movable rod 54. The two ends of the second spring 55 are respectively fixedly connected to the lower surface of the installation frame one 42 and the bottom of the movable pipe 51; A second mounting bracket 421 is rotatably connected with a second rotating pipe 521. A ball 53 is also arranged between the second rotating pipe 521 and the second mounting bracket 421. A steel wire rope 56 is fixedly connected between the first rotating pipe 52 and the second rotating pipe 521.

[0021] As Figure 2 , Figure 4 , Figures 6 to 10 shown, a support assembly is also arranged at one end of the movable rod 54 passing through the hole of the first mounting bracket 42. The support assembly includes a fixed bracket 61. A fixed bracket 61 is fixedly connected among one ends of a plurality of movable rods 54 passing through the holes of the first mounting bracket 42. An opening for the steel wire rope 56 to move is formed in the middle of the fixed bracket 61. A plurality of rotating grooves 62 arranged in an annular array are formed in the fixed bracket 61. A fixed shaft 63 is fixedly connected to the inside of each rotating groove 62. A first support rod 64 is rotatably connected to each fixed shaft 63. A plurality of limiting holes are formed in the first mounting bracket 42 inside the diamond drill bit body 1. The number of the limiting holes is the same as that of the first support rods 64, and the plurality of limiting holes are arranged corresponding to the positions of the plurality of first support rods 64. Two torsion springs 65 symmetrical about the adjacent first support rods 64 are sleeved on each fixed shaft 63. Two ends of each torsion spring 65 are fixedly connected to the groove wall of the rotating groove 62 and the first support rod 64 respectively. A second support rod 66 is slidably connected to the inside of each first support rod 64. A third spring 67 is fixedly connected between the first support rod 64 and the adjacent second support rod 66. A plurality of abutting rods 68 arranged in a circumferential array are fixedly connected to the bottom end of the movable pipe 51. The number and positions of the abutting rods 68 correspond to those of the plurality of second support rods 66. One end of each abutting rod 68 away from the movable pipe 51 abuts against the adjacent second support rod 66.

[0022] Among them: The groove wall on one side of the rotating groove 62 away from the first rotating pipe 52 is arranged as an inclined surface, which is used to limit the angle of the first support rod 64 after rotation, so that the first support rod 64 can only rotate outward by a certain angle, and the first support rod 64 is limited to be in an inclined downward state after rotation.

[0023] Further explanation: A plurality of limiting holes are also formed in the second mounting bracket 421. The aperture of the limiting hole on the first mounting bracket 42 is larger than that of the first support rod 64, that is, there are gaps between both sides of the first support rod 64 and the limiting hole. In addition, there are also gaps between both sides of the first support rod 64 and the adjacent rotating groove 62. When pumping drilling fluid into the diamond drill bit body 1, the drilling fluid will flow downward through the limiting holes on the second mounting bracket 421, then flow downward through the gap between the first support rod 64 and the rotating groove 62, and finally flow downward into the diamond drill bit body 1 through the gap between the first support rod 64 and the limiting hole on the first mounting bracket 42, so as to effectively transport the drilling fluid.

[0024] Combined with the above preferred embodiments, the following is the entire working process and working principle of the above embodiments: The initial state is: The first mounting frame 42 and the second mounting frame 421 are not respectively installed inside the diamond drill bit body 1 and the drill pipe 3. At this time, the first rotating pipe 52 and the second rotating pipe 521 do not pull the steel wire rope 56. Therefore, the steel wire rope 56 is in a slack and bent state, that is, there is a surplus. The first support rod 64 is located inside the limit hole of the first mounting frame 42. The first support rod 64 causes the torsion spring 65 to be in a deformed state. The abutting rod 68 keeps abutting against the bottom of the adjacent second support rod 66 to limit the second support rod 66, so that the second support rod 66 is located inside the first support rod 64.

[0025] The working state is: The staff can connect the diamond drill bit body 1 and the drill pipe 3 by threads, and then install the drill pipe 3 on the existing drilling equipment. The drill pipe 3 drives the diamond drill bit body 1 to rotate, and the diamond drill bit body 1 is used for drilling work. During this process, the drilling fluid can be pumped into the diamond drill bit body 1 through the existing delivery pump, and then sprayed out of the diamond drill bit body 1 through the water spraying holes 11. The drilling fluid can clean the soil or rock outside the drill bit, and at the same time, the diamond drill bit body 1 can be cooled after the drilling fluid is sprayed, so as to avoid the situation that the temperature of the diamond drill bit body 1 is too high.

[0026] Among them, during the drilling process of the diamond drill bit body 1, soil or rock accumulates at the bottom of the well, and the soil or rock is discharged upward from the chip removal channel on the outer side of the diamond drill bit body 1 during the continuous downward pressing of the diamond drill bit body 1. During the process of the water spraying holes 11 spraying the drilling fluid, part of the drilling fluid is sprayed into the diversion shell 21 through the inclined holes 22. Because the inclined holes 22 are arranged obliquely upward, the drilling fluid sprayed out of the inclined holes 22 can wash the soil or rock inside the diversion shell 21 and directly push the soil or rock in the well upward. Through the upward spraying of the drilling fluid and the guiding action of the diversion shell 21, the cuttings can be better discharged from the well.

[0027] The installation component is installed inside the diamond drill bit body 1 and the drill pipe 3: Before the diamond drill bit body 1 is threadedly connected with the drill rod 3, the staff installs the mounting frame 1 42 and the mounting frame 2 421 inside the diamond drill bit body 1 and the drill rod 3 respectively. The steps of installing the mounting frame 1 42 inside the diamond drill bit body 1 are the same as the steps of installing the mounting frame 2 421 inside the drill rod 3. Here, only the installation of the mounting frame 1 42 inside the diamond drill bit body 1 is described. The staff holds the mounting frame 1 42 and then toggles the dial plate 46 to make the dial plate 46 move toward the middle direction of the mounting frame 1 42. The dial plate 46 drives the limit block 45 to move inside the movable groove 43 toward the side close to the spring 1 44. The spring 1 44 is compressed by the limit block 45 at this time, and the limit block 45 will retract into the inside of the active groove 43. At the same time, the staff puts the mounting frame 42 into the inside of the diamond drill bit body 1. When the limit block 45 is aligned with the gap between the two annular structures of the limit ring 41, the dial plate 46 is released, and the limit block 45 moves inside the active groove 43 to the side away from the spring 44 under the elastic reset action of the spring 44. At this time, the limit block 45 will protrude from the mounting frame 42 and be stuck between the two annular structures. The limit ring 41 limits the limit block 45, so that the mounting frame 42 is effectively installed inside the diamond drill bit body 1.

[0028] Then the staff installs the second mounting frame 421 in the drill rod 3 in the same manner as described above. After the first mounting frame 42 and the second mounting frame 421 are installed inside the diamond drill bit body 1 and the drill rod 3 respectively, the wire rope 56 is placed between the diamond drill bit body 1 and the drill rod 3.

[0029] To achieve drop prevention: During the drilling process, when the pre-tightening force of the threaded connection between the diamond drill bit body 1 and the drill rod 3 is insufficient, or the connection mating surface is contaminated, the thread is worn, the connection is eroded by high-sand mud for a long time, etc., the connection between the diamond drill bit body 1 and the drill rod 3 is easy to loosen, and even cause the diamond drill bit body 1 to fall off.

[0030] If the diamond bit body 1 becomes loose from the drill pipe 3 and causes the diamond bit body 1 to fall, the diamond bit body 1 will move downward in the drilling well due to its own weight. Since the first mounting frame 42 is fixedly installed inside the diamond bit body 1 through the limiting ring 41 and the limiting block 45, when the diamond bit body 1 moves downward, it will drive the first mounting frame 42 inside it to move downward synchronously. At this time, the drill pipe 3 is connected to the external drilling equipment and will not fall. Since the top of the steel wire rope 56 is fixed by the second rotating pipe 521, when the diamond bit body 1 falls downward, the steel wire rope 56 will be gradually straightened. After the steel wire rope 56 is straightened, the bottom of the steel wire rope 56 can limit the first rotating pipe 52 and the movable pipe 51, that is, after the steel wire rope 56 is straightened, the movable pipe 51 will no longer move downward, that is, the movable pipe 51, the first rotating pipe 52, the ball 53 and the movable rod 54 will not move downward. At this time, since the diamond bit body 1 moves downward in the drilling well, it will drive the first mounting frame 42 inside it to move downward on the outer surface of the movable pipe 51. When the first mounting frame 42 moves downward, it will compress the second spring 55, and buffer the falling of the first mounting frame 42 through the second spring 55, so that the tension on the steel wire rope 56 gradually increases, preventing the steel wire rope 56 from being instantaneously overstressed and avoiding the fracture of the steel wire rope 56.

[0031] Expansion of the support assembly: After the wire rope 56 is pulled to the straight state, the movable tube 51 and the movable rod 54 no longer move downward, and the fixed frame 61, the fixed shaft 63 in the rotating groove 62 and the support rod 1 64 remain in a state of not moving downward. At this time, the interference rod 68 always remains in a state of being in contact with the support rod 2 66. During the downward movement of the mounting frame 1 42, the mounting frame 1 42 will also slide downward relative to the support rod 1 64. When the mounting frame 1 42 moves downward to the point where the inner side wall of the limiting hole is no longer in contact with the support rod 1 64 (that is, after the mounting frame 1 42 moves to the bottom position of the movable tube 51 and the movable rod 54), at this time, the multiple support rods 1 64 swing outward with the fixed shaft 63 as the rotation axis under the elastic reset action of the torsion spring 65. After the multiple support rods 1 64 swing outward, they form an umbrella-like unfolding manner. The support rod 1 64 will cause the support rod 2 66 therein to swing outward as well. After the swing, the support rod 2 66 no longer conflicts with the resistance rod 68. Under the elastic restoring action of the spring three 67, the support rod 2 66 moves inside the support rod 1 64 to the side away from the fixed shaft 63, that is, the support rod 2 66 moves to the outside of the support rod 1 64. The inclined surface of the groove wall of the rotating groove 62 makes the support rod 1 64 only in an inclined state after unfolding, and at this time, the support rod 2 66 also maintains an umbrella-shaped unfolded state. Under the elastic action of the spring three 67, the support rod 2 66 is supported on the drilling wall. With the inclined surface of the rotating groove 62, the support rod 1 64 and the support rod 2 66 can assist in supporting the fixed frame 61, so that the movable rod 54, the movable tube 51, the rotating tube 1 52, the wire rope 56 and other structures can better support the diamond drill bit body 1, prevent the diamond drill bit body 1 from continuing to fall, and also keep the diamond drill bit body 1 stable in the drilling well.

[0032] Towing and salvaging by wire rope 56: One end of the steel wire rope 56 is fixed inside the drill rod 3 through the mounting frame 42 and the rotating tube 2 521 inside the drill rod 3, and the other end of the steel wire rope 56 is used to suspend and pull the diamond drill bit body 1 through the mounting frame 42 inside the diamond drill bit body 1. The drill rod 3 is recovered by the drilling equipment, and the drill rod 3 can pull the diamond drill bit body 1 through the steel wire rope 56 to realize the salvage operation of the diamond drill bit body 1, thereby reducing the need to use special salvage equipment separately. Pulling the diamond drill bit body 1 directly through the steel wire rope 56 can reduce the difficulty of salvage, reduce the salvage time, and reduce the impact of salvaging the diamond drill bit body 1 on the drilling efficiency.

[0033] The support assembly stabilizes the salvage of the diamond drill bit body 1: During the process of fishing for the diamond bit body 1 with the wire rope 56, different environments in different formations in the wellbore may cause the diamond bit body 1 to shake during fishing. When the diamond bit body 1 shakes, it is easy to collide with the well wall, which is not convenient for fishing the diamond bit body 1. During the process of the diamond bit body 1 being pulled by the wire rope 56, the second support rod 66 abuts against the wellbore wall. At the same time, with the elastic action of the third spring 67 and the torsion spring 65, the second support rod 66 can stabilize the diamond bit body 1, prevent the diamond bit body 1 from shaking in the wellbore, reduce the impact of the shaking of the diamond bit body 1 on fishing, and improve the fishing efficiency.

[0034] It should be noted that: if the diamond bit body 1 falls to the bottom of the well and the wire rope 56 has not been straightened or the wire rope 56 has been straightened but the support assembly has not been deployed, at this time, it is necessary to first pull the drill pipe 3 through the drilling equipment. After the wire rope 56 is straightened by the drill pipe 3, then pull the first rotating pipe 52, the movable pipe 51, the movable rod 54 and the fixed frame 61 through the straightened wire rope 56, so that the first support rod 64 moves upward relative to the diamond bit body 1 and the first mounting frame 42 until the inner side wall of the limit hole of the first mounting frame 42 does not fit with the first support rod 64, so that the support assembly is deployed. At this time, the support assembly can also play a role in supporting and stabilizing the diamond bit body 1.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spiral-tooth diamond bit, comprising a diamond bit body (1) and a drill pipe (3), the diamond bit body (1) is threadedly connected to the drill pipe (3), and a plurality of water spray holes (11) are formed at the bottom of the diamond bit body (1), characterized in that, An installation assembly is provided between the diamond drill bit body (1) and the drill pipe (3). The installation assembly includes two sets of limit rings (41) respectively fixedly arranged on the inner sides of the diamond drill bit body (1) and the drill pipe (3). An installation frame one (42) is arranged inside the diamond drill bit body (1), and an installation frame two (421) is arranged inside the drill pipe (3). A plurality of movable grooves (43) are formed in both the installation frame one (42) and the installation frame two (421). A limit block (45) is slidably connected in each movable groove (43). A first spring (44) is fixedly connected between the limit block (45) and the adjacent movable groove (43). It also includes a movable pipe (51) slidably arranged in the middle of the installation frame one (42). A rotating pipe one (52) is rotatably connected inside the movable pipe (51). A rotating pipe two (521) is rotatably connected to the installation frame two (421). A steel wire rope (56) is fixedly connected between the rotating pipe one (52) and the rotating pipe two (521). One end of the movable pipe (51) far away from the installation frame one (42) is fixedly connected with a plurality of movable rods (54). The movable rods (54) extend through the installation frame one (42) and are slidably connected with the installation frame one (42). A second spring (55) is sleeved outside the movable rods (54).

2. The spiral-tooth diamond drill bit according to claim 1, characterized in that, The movable groove (43) is arranged in an L shape, and the shape of the limit block (45) is adapted to the shape of the movable groove (43).

3. A spiral-tooth diamond drill bit according to claim 2, characterized in that, Each group of limit rings (41) is composed of two circular ring structures. A preset gap is left between the two circular ring structures in each group. The limit blocks (45) are arranged corresponding to the limit rings (41).

4. A spiral-tooth diamond drill bit according to claim 3, wherein A dial (46) is fixedly connected to each limit block (45).

5. A spiral-tooth diamond drill bit according to claim 4, characterized in that, Ball bearings (53) are arranged between the outer surface of the rotating pipe one (52) and the inner surface of the movable pipe (51), and ball bearings (53) are also arranged between the rotating pipe two (521) and the installation frame two (421). The two ends of the second spring (55) are respectively fixedly connected to the installation frame one (42) and the movable pipe (51).

6. The spiral-tooth diamond drill bit according to claim 5, wherein One end of the movable rod (54) passing through the first mounting frame (42) is further provided with a support assembly. The support assembly includes a fixed frame (61). A fixed frame (61) is fixedly connected in common between one ends of multiple movable rods (54) passing through the first mounting frame (42). Multiple rotating grooves (62) are formed in the fixed frame (61). A fixed shaft (63) is fixedly connected inside each rotating groove (62). A first support rod (64) is rotatably connected to each fixed shaft (63). Multiple limiting holes are formed in the first mounting frame (42). The number of the limiting holes is the same as that of the first support rods (64), and the multiple limiting holes are respectively arranged corresponding to the positions of the multiple first support rods (64). A torsion spring (65) is arranged between the first support rod (64) and the adjacent rotating groove (62). A second support rod (66) is slidably connected inside each first support rod (64). A third spring (67) is fixedly connected between the first support rod (64) and the adjacent second support rod (66). One end of the movable tube (51) away from the first mounting frame (42) is fixedly connected with multiple abutting rods (68). The number and positions of the abutting rods (68) are arranged corresponding to the multiple second support rods (66). One end of each abutting rod (68) away from the movable tube (51) abuts against the adjacent second support rod (66).

7. A spiral-tooth diamond drill bit according to claim 6, characterized in that, An opening for the steel wire rope (56) to move is formed in the middle of the fixed frame (61). The groove wall on one side of the rotating groove (62) away from the first rotating tube (52) is arranged as an inclined surface.

8. A spiral-tooth diamond drill bit according to claim 7, characterized in that, A flow guiding assembly is arranged on the diamond drill bit body (1). The flow guiding assembly includes multiple flow guiding shells (21) fixedly connected to the outer side wall of the diamond drill bit body (1). Oblique holes (22) are formed in the diamond drill bit body (1) at positions corresponding to each flow guiding shell (21). The oblique holes (22) are communicated with the adjacent water spraying holes (11), and the oblique holes (22) are inclined.

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