Offshore oil field drill bit

Abstract

The invention belongs to the field of ocean engineering, and particularly relates to an ocean oil field drill bit which comprises a drill bit body and a dredging structure. The dredging structure comprises a dredging rod, a supporting rod, a first sliding block and a rubber sleeve. A dredging rod and a rubber sleeve are arranged; after the drill bit stops, due to the fact that the water pressure of the seabed is large, an annular cavity in the rubber sleeve is compressed and blocked by an annular plate, the rubber sleeve is compressed along a reset groove, the dredging rod is located at the top of the water hole, high-pressure water flow is introduced into the water hole, and the water flow impacts the dredging rod and pushes the dredging rod to slide downwards to dredge the water hole in cooperation with the high-pressure water flow; the probability of water hole blockage is reduced, the frequency of taking out the drill bit is reduced, and the exploitation construction progress of an oil field is accelerated.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering, specifically a marine oilfield drill bit. Background Technology

[0002] Petroleum is an essential mineral resource for current social development. The vast ocean contains abundant petroleum resources. In order to develop the petroleum in the ocean, offshore oil fields are established. When opening offshore oil fields, drilling engineering is required on the seabed, using drill bits to penetrate the seabed strata until the oil layer is reached.

[0003] A Chinese patent with publication number CN108035681B discloses a marine oilfield drill bit, mainly comprising a connecting rod and a drill body. The top of the drill body is fixedly connected to the bottom plate of the connecting rod. The drill body includes a drill bit and auxiliary drills, with the auxiliary drills disposed on the end face of the drill bit base. The drill bit is conical, and there are multiple auxiliary drills, each with abrasive grains evenly distributed on it. A water inlet is formed between two adjacent auxiliary drills, and the water inlet is streamlined. The multiple auxiliary drills are arranged in an arc shape around the drill bit as the central axis. The bottom of the auxiliary drill is slightly lower than the bottom of the drill bit, and a hard alloy layer is fixedly disposed at the bottom of the drill bit. This invention has a simple structure, is practical, safe, and convenient, and can effectively ensure the efficiency of drilling and well diving while ensuring the service life of the drill body. It utilizes the drill bit to first drill at a point, and then uses the auxiliary drills to drill at a surface, ensuring that the rock formation can be cracked first under the action of the drill bit, and then the entire surface is drilled by the auxiliary drills, ensuring practical effect and usability.

[0004] Because offshore oilfields are separated from the sea, drill bits cannot be pulled up and pulled out as easily as those in onshore oilfields. Drilling speed is slower in the seabed formations, and especially after the drill bit stops, the mud inside the well adheres to the surface of the drill bit, causing mud pockets. In severe cases, this can even block the water holes of the drill bit, resulting in poor drainage and preventing the drill bit from working properly. The drill bit needs to be removed to clean the water holes. Pulling out drill bits in offshore oilfields is very difficult and troublesome, seriously affecting the progress of oilfield development.

[0005] Therefore, the present invention provides a marine oilfield drill bit. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A marine oilfield drill bit, comprising a drill bit and a dredging structure; the drill bit includes a matrix, a gauge material, and diamond composite plates; the gauge material is fixedly attached to the outer ring of the bottom of the matrix, and multiple diamond composite plates are fixedly attached to the outer side of the gauge material; multiple water holes are opened inside the matrix, and a dredging structure is provided inside each water hole; the matrix is ​​the main body of the drill bit, mainly used for connection and fixation with the drill pipe, and also provides a support carrier for the gauge material; the gauge material is fixed to the outer side of the matrix to ensure the borehole diameter, and the gaps between adjacent gauge materials provide channels for the discharge of wastewater and sludge; the diamond composite plates are the main cutting positions of the drill bit, mainly used for breaking rocks to achieve rapid drilling; multiple water holes penetrate the bottom of the matrix, and the tops of the multiple water holes connect to the water channels of the drill pipe; high-pressure water from the marine oilfield drilling platform sprays high-pressure water through the water holes to the bottom of the well, flushing the surface of the drill bit and removing the sludge from the bottom of the well. The unblocking structure includes an unblocking rod, a support rod, a first slider, and a rubber sleeve. Multiple grooves are formed on the inner wall of the water inlet. A reset groove is formed on the inner wall of each groove. A slider is fixedly connected inside the reset groove. The first slider is slidably installed inside the reset groove. The inner ring of the first slider slides in conjunction with the outer ring of the slider. A rubber sleeve is fixedly connected to the top surface of the first slider. The top surface of the rubber sleeve is fixedly connected to the top wall of the reset groove. The inner wall of the rubber sleeve slides in conjunction with the outer wall of the slider. Multiple annular cavities are formed inside the rubber sleeve. An annular plate is fixedly connected to the inside of each annular cavity. A support rod is fixedly connected to the side of the first slider. The side wall of the support rod is connected to the groove... The system features a sliding fit on the sidewalls, with a clearing rod positioned in the middle of the support rods. During operation, when the drill bit stops, the high water pressure at the seabed compresses the annular cavity within the rubber sleeve. Blocked by the annular plate, the rubber sleeve compresses along the reset groove, causing the clearing rod to slide upwards. Before the drill bit starts moving, high-pressure water flows into the water eye. The water impacts the clearing rod, pushing it downwards and causing the first slider to slide downwards along the reset groove. This stretches and resets the rubber sleeve, working in conjunction with the high-pressure water flow to clear the water eye, reducing the probability of blockage and thus decreasing the frequency of drill bit removal, thereby improving the oilfield's extraction and construction progress.

[0008] Preferably, the top of the unblocking rod is fixed to a cone, the arc surface of the cone is provided with multiple arc-shaped blades, and the middle of the multiple support rods is fixed to a ring. The outer ring of the top of the unblocking rod is provided with an annular groove, and the inner ring of the ring slides in conjunction with the inner ring of the annular groove. In use, when high-pressure water flows through the water hole and passes through the arc-shaped blades, it pushes the cone to slide downwards, and at the same time causes the cone to rotate, which drives the unblocking rod to rotate and slide downwards, thereby further improving the unblocking effect of the unblocking rod.

[0009] Preferably, the cross-section of the support rod is streamlined, and the side with the larger diameter of the streamlined support rod is aligned with the water flow direction of the water inlet. In use, by designing the support rod to be streamlined, the streamlined shape effectively reduces resistance in the fluid, thereby reducing the impact force of the high-pressure water flow on the support rod and reducing the impact on the support rod, thus reducing the probability of deformation and breakage of the support rod, and improving the overall safety of the dredging structure.

[0010] Preferably, the inner wall of the water eye has multiple fan-shaped grooves on its bottom outer ring, and the inner wall of each fan-shaped groove has an arc-shaped groove. Multiple fan-shaped arc plates are rotatably mounted on the inner wall of the water eye. A connecting rod is fixed to the top of each fan-shaped arc plate, and the connecting rod slides within the fan-shaped groove. An arc-shaped rubber column is fixed to the bottom surface of the arc-shaped groove. Multiple elliptical cavities are formed inside each arc-shaped rubber column, and circular plates are fixed to the interior of each elliptical cavity. A second slider is fixed to the top surface of the arc-shaped rubber column, and the second slider slides within the arc-shaped groove. The second slider is fixed to the top of the connecting rod. When the drill bit stops, the high water pressure at the seabed compresses the elliptical cavity inside the arc-shaped rubber column. Blocked by the circular plate, the arc-shaped rubber column compresses along the arc-shaped groove, causing the second slider to slide downwards. This causes the fan-shaped arc plates to rotate around the axis, clamping the dredging rod and blocking the water hole. When high-pressure water flows through the water hole, it pushes the fan-shaped arc plates to rotate, causing the second slider to slide upwards, stretching and resetting the arc-shaped rubber column. This reduces the probability of silt entering the water hole, further reducing the frequency of drill bit removal.

[0011] Preferably, multiple fan-shaped arc plates form a cone shape, with an arc-shaped opening at the bottom of each fan-shaped arc plate. The multiple arc-shaped openings form a circular opening, and the concave surface of the arc-shaped opening slides in contact with the outer wall of the unblocking rod. In use, the multiple fan-shaped arc plates combine to form a cone shape, which, together with the unblocking rod, forms a cone with an acute angle pointing downwards. This effectively blocks the pressure impact inside the oil well, improves the overall strength of the fan-shaped arc plates, reduces the probability of the fan-shaped arc plates overturning, and further improves the overall safety of the unblocking structure.

[0012] Preferably, the top outer wall of the arc-shaped groove and the top wall of the second slider are both fixedly connected with multiple protrusions, and the protrusions on both sides slide in cooperation; when in use, when the second slider slides, the protrusions on both sides contact and slide, causing the second slider to vibrate, which drives the fan-shaped arc plate to vibrate, shaking off the silt on the surface of the fan-shaped arc plate, thereby improving the cleanliness of the water eye.

[0013] Preferably, multiple round holes are provided on both sides of the fan-shaped arc plate, and rubber springs are fixed between the two sides opposite to the round holes; in use, the fan-shaped arc plates on both sides are pulled by the rubber springs, making the clamping of the unblocking rod by the fan-shaped arc plates more secure.

[0014] Preferably, multiple oblique toothed plates are fixedly connected to the concave surface of the fan-shaped arc plate, and multiple water passage holes are opened at the junction of the oblique toothed plates and the fan-shaped arc plate. The diameter of the inlet end of the water passage hole is larger than the diameter of the outlet end, and multiple elastic vibrating plates are fixedly connected inside the water passage hole. In use, when the high-pressure water flows through the fan-shaped arc plate and the water flows through the water passage hole, the flow velocity of the water in the water passage hole continuously increases because the diameter of the inlet end of the water passage hole is larger than the diameter of the outlet end. The increased flow velocity causes the elastic vibrating plates to vibrate violently, which in turn causes the fan-shaped arc plate to vibrate, further shaking away the silt on the surface of the fan-shaped arc plate, thereby further improving the cleanliness of the water passage.

[0015] Preferably, the bottom outer ring of the unblocking rod has multiple storage slots, and a striking flexible rod is rotatably installed at the top of the storage slot. The end of the striking flexible rod slides in conjunction with the inner ring of the fan-shaped arc plate. Magnets are provided on both sides of the middle of the striking flexible rod and the inner wall of the storage slot, and the magnets attract each other. In use, when the high-pressure water flow in the water hole is closed, the unblocking rod stops rotating and slides upward. At the same time, the fan-shaped arc plate closes, pushing the striking flexible rod to rotate. The magnets on both sides attract each other, storing the striking flexible rod in the storage slot. When the unblocking rod rotates, the striking flexible rod is subjected to centrifugal force and rotates from the storage slot, causing the striking flexible rod to strike the fan-shaped arc plate, further increasing the vibration intensity of the fan-shaped arc plate.

[0016] The beneficial effects of this invention are as follows: 1. The present invention relates to a marine oilfield drill bit, which includes a dredging rod and a rubber sleeve. After the drill bit stops, due to the high water pressure on the seabed, the annular cavity inside the rubber sleeve is compressed. Blocked by the annular plate, the rubber sleeve is compressed along the reset groove, causing the dredging rod to be positioned at the top of the water eye. High-pressure water flows into the water eye, impacting the dredging rod and pushing it downwards. This, combined with the high-pressure water flow, clears the water eye, reducing the probability of blockage and the frequency of drill bit removal, thus improving the oilfield's extraction and construction progress.

[0017] 2. The offshore oilfield drill bit of the present invention comprises a fan-shaped arc plate, an arc-shaped rubber column, and a circular plate. When the drill bit stops, the elliptical cavity inside the arc-shaped rubber column is compressed by water pressure. Under the obstruction of the circular plate, the arc-shaped rubber column is compressed along the arc-shaped groove, pushing the fan-shaped arc plate to rotate around the axis. Multiple fan-shaped arc plates clamp the dredging rod, which, together with the dredging rod, blocks the water hole, reducing the probability of silt entering the water hole and further reducing the frequency of drill bit removal. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of Embodiment 1 of the present invention; Figure 2This is a front view of Embodiment 1 of the present invention; Figure 3 yes Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 yes Figure 3 Enlarged view of a section at point B in the middle; Figure 5 yes Figure 3 Enlarged view of a section at point C; Figure 6 yes Figure 3 Enlarged view of a section at point D; Figure 7 yes Figure 3 Enlarged view of a section at point E in the middle; Figure 8 This is a partial cross-sectional view of the flexible rod being struck according to Embodiment 2 of the present invention.

[0020] In the diagram: 1. Drill bit; 2. Water eye; 3. Unblocking rod; 4. Support rod; 5. No. 1 slider; 6. Rubber sleeve; 7. Slide groove; 8. Reset groove; 9. Slide rod; 10. Annular cavity; 11. Annular plate; 12. Cone; 13. Arc blade; 14. Ring; 15. Ring groove; 16. Fan-shaped groove; 17. Arc groove; 18. Fan-shaped arc plate; 19. Connecting rod; 20. Arc rubber column; 21. Elliptical cavity; 22. Circular plate; 23. No. 2 slider; 24. Arc opening; 25. Protrusion; 26. Circular hole; 27. Rubber spring; 28. Helical toothed plate; 29. ​​Water passage hole; 30. Elastic vibrating plate; 31. Storage groove; 32. Striking soft rod; 33. Magnet; 34. Roller; 35. Rivet; 101. Carcass; 102. Diameter-protecting material; 103. Diamond composite sheet. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figures 1 to 4As shown in the embodiment of the present invention, a marine oilfield drill bit includes a drill bit 1 and a dredging structure. The drill bit 1 includes a matrix 101, a gauge-maintaining material 102, and diamond composite sheets 103. The gauge-maintaining material 102 is fixedly connected to the bottom outer ring of the matrix 101, and multiple diamond composite sheets 103 are fixedly connected to the outer side of the gauge-maintaining material 102. Multiple water holes 2 are formed inside the matrix 101, and a dredging structure is provided inside the water holes 2. The matrix 101 is the main body of the drill bit 1, mainly used for connecting and fixing with the drill pipe, and at the same time providing a support carrier for the gauge-maintaining material 102. The gauge material 102 is fixed to the outside of the matrix 101 to ensure the borehole diameter. At the same time, the gap between adjacent gauge materials 102 provides a channel for the discharge of wastewater and sludge. The diamond composite sheet 103 is the main cutting position of the drill bit and is mainly used to break rocks to achieve the purpose of rapid drilling. Multiple water holes 2 of the matrix 101 penetrate the bottom of the matrix 101, and the top of the multiple water holes 2 is connected to the water channel of the drill pipe. The high-pressure water flow of the offshore oilfield drilling platform sprays high-pressure water flow to the bottom of the well through the water holes 2, flushes the surface of the drill bit 1, and washes out the sludge at the bottom of the well. The unblocking structure includes an unblocking rod 3, a support rod 4, a first slider 5, and a rubber sleeve 6. Multiple grooves 7 are formed on the inner wall of the water eye 2. A reset groove 8 is formed on the inner wall of each groove 7. A slider 9 is fixedly connected inside the reset groove 8. The first slider 5 is slidably installed inside the reset groove 8. The inner ring of the first slider 5 slides with the outer ring of the slider 9. The top surface of the first slider 5 is fixedly connected to the rubber sleeve 6. The top surface of the rubber sleeve 6 is fixedly connected to the top wall of the reset groove 8. The inner wall of the rubber sleeve 6 slides with the outer wall of the slider 9. Multiple annular cavities 10 are formed inside the rubber sleeve 6. An annular plate 11 is fixedly connected inside each annular cavity 10. The support rod 4 is fixedly connected to the side of the first slider 5. The side wall of the support rod 4... The sidewall of the chute 7 slides together, and a clearing rod 3 is provided in the middle of the middle of the multiple support rods 4. The clearing rod 3 is located in the middle of the water eye 2. When the drill bit 1 stops, the high water pressure on the seabed causes the annular cavity 10 inside the rubber sleeve 6 to be compressed. It is blocked by the annular plate 11, causing the rubber sleeve 6 to be compressed along the reset groove 8, which drives the clearing rod 3 to slide upward. Before the drill bit 1 starts, high-pressure water is introduced into the water eye 2. The water flow impacts the clearing rod 3 and pushes the clearing rod 3 to slide downward, which drives the first slider 5 to slide downward along the reset groove 8, causing the rubber sleeve 6 to stretch and reset. With the help of the high-pressure water flow, the water eye 2 is cleared, reducing the probability of the water eye 2 being blocked. This reduces the frequency of removing the drill bit 1, thereby improving the progress of oilfield exploitation and construction.

[0023] like Figure 3 and Figure 5As shown, the top of the unblocking rod 3 is fixed to a cone 12, and the arc surface of the cone 12 is provided with multiple arc-shaped blades 13. The middle of the multiple support rods 4 is fixed to a ring 14. The outer ring of the top of the unblocking rod 3 is provided with an annular groove 15, and the inner ring of the ring 14 slides in cooperation with the inner ring of the annular groove 15. In use, high-pressure water flows through the water eye 2. When the high-pressure water flows through the arc-shaped blades 13, it pushes the cone 12 to slide downward, and at the same time causes the cone 12 to rotate, which drives the unblocking rod 3 to rotate and slide downward, thereby further improving the unblocking effect of the unblocking rod 3.

[0024] The cross-section of the support rod 4 is streamlined, and the side with the larger diameter of the streamlined support rod 4 is aligned with the water flow direction of the water eye 2. In use, by designing the support rod 4 as streamlined, the streamlined shape effectively reduces resistance in the fluid, thereby reducing the impact force of the high-pressure water flow on the support rod 4 and reducing the impact on the support rod 4. This reduces the probability of the support rod 4 deforming and breaking, and thus improves the overall safety of the dredging structure.

[0025] like Figure 3 , Figure 6 and Figure 7 As shown, the inner wall of the water eye 2 has multiple fan-shaped grooves 16 on its outer bottom ring, and arc-shaped grooves 17 on its inner wall. Multiple fan-shaped arc plates 18 are rotatably mounted on the inner wall of the water eye 2. A connecting rod 19 is fixedly connected to the top of each fan-shaped arc plate 18, and the connecting rod 19 slides with the fan-shaped groove 16. An arc-shaped rubber column 20 is fixedly connected to the bottom surface of the arc-shaped groove 17. Multiple elliptical cavities 21 are formed inside the arc-shaped rubber column 20, and a circular plate 22 is fixedly connected inside each elliptical cavity 21. A second slider 23 is fixedly connected to the top surface of the arc-shaped rubber column 20, and the second slider 23 slides with the arc-shaped groove 17. The second slider 23 is connected to the connecting rod... The top of 19 is fixed; when the drill bit 1 stops, due to the high water pressure on the seabed, the elliptical cavity 21 inside the arc-shaped rubber column 20 is compressed. It is blocked by the circular plate 22, which causes the arc-shaped rubber column 20 to be compressed along the arc-shaped groove 17. This causes the second slider 23 to slide downward, which causes the fan-shaped arc plate 18 to rotate around the axis. This causes multiple fan-shaped arc plates 18 to clamp the unblocking rod 3. Together with the unblocking rod 3, they block the water eye 2. When the high-pressure water flows through the water eye 2, it pushes the fan-shaped arc plate 18 to rotate, which causes the second slider 23 to slide upward, causing the arc-shaped rubber column 20 to stretch and reset. This reduces the probability of silt entering the water eye 2, and further reduces the frequency of removing the drill bit 1.

[0026] Multiple fan-shaped arc plates 18 form a cone shape, with an arc-shaped opening 24 at the bottom of each fan-shaped arc plate 18. The multiple arc-shaped openings 24 form a circular opening, and the concave surface of the arc-shaped opening 24 slides in contact with the outer wall of the unblocking rod 3. In use, the multiple fan-shaped arc plates 18 combine to form a cone shape, which, together with the unblocking rod 3, forms a cone with an acute angle pointing downwards. This effectively blocks the pressure impact inside the oil well, improves the overall strength of the fan-shaped arc plates 18, reduces the probability of the fan-shaped arc plates 18 overturning, and further improves the overall safety of the unblocking structure.

[0027] The top outer wall of the arc-shaped groove 17 and the top wall of the second slider 23 are both fixedly connected to multiple protrusions 25, and the protrusions 25 on both sides slide in cooperation. When in use, when the second slider 23 slides, the protrusions 25 on both sides contact and slide, causing the second slider 23 to vibrate, which drives the fan-shaped arc plate 18 to vibrate, shaking off the silt on the surface of the fan-shaped arc plate 18, thereby improving the cleanliness of the water eye 2.

[0028] Multiple round holes 26 are provided on both sides of the fan-shaped arc plate 18, and rubber springs 27 are fixed between the two sides opposite the round holes 26. In use, the fan-shaped arc plates 18 on both sides are pulled by the rubber springs 27, making the fan-shaped arc plates 18 clamp the unblocking rod 3 more firmly.

[0029] Multiple oblique toothed plates 28 are fixedly connected to the concave surface of the fan-shaped arc plate 18. Multiple water passage holes 29 are opened at the junction of the oblique toothed plates 28 and the fan-shaped arc plate 18. The diameter of the water inlet end of the water passage hole 29 is larger than the diameter of the water outlet end. Multiple elastic vibrating plates 30 are fixedly connected inside the water passage hole 29. In use, when the high-pressure water flows through the fan-shaped arc plate 18 and the water flows through the water passage hole 29, the flow velocity of the water in the water passage hole 29 continuously increases because the diameter of the water inlet end of the water passage hole 29 is larger than the diameter of the water outlet end. This causes the elastic vibrating plates 30 to vibrate violently, which in turn causes the fan-shaped arc plate 18 to vibrate. This further shakes away the silt on the surface of the fan-shaped arc plate 18, thereby further improving the cleanliness of the water eye 2.

[0030] The bottom outer ring of the unblocking rod 3 has multiple storage slots 31. The top of the storage slot 31 is rotatably mounted with a striking flexible rod 32. The end of the striking flexible rod 32 slides in conjunction with the inner ring of the fan-shaped arc plate 18. The middle part of the striking flexible rod 32 and the inner wall of the storage slot 31 are both provided with magnets 33. The magnets 33 on both sides attract each other. In use, when the high-pressure water flow in the water eye 2 is closed, the unblocking rod 3 stops rotating and slides upward. At the same time, the fan-shaped arc plate 18 closes and pushes the striking flexible rod 32 to rotate. The magnets 33 on both sides attract each other and store the striking flexible rod 32 in the storage slot 31. When the unblocking rod 3 rotates, the striking flexible rod 32 is subjected to centrifugal force and rotates from the storage slot 31, causing the striking flexible rod 32 to strike the fan-shaped arc plate 18, further increasing the vibration intensity of the fan-shaped arc plate 18.

[0031] Example 2: Figure 8 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the end of the striking flexible rod 32 is rotatably mounted with a roller 34, and the outer ring of the roller 34 is fixed with a plurality of rivets 35; in use, when the striking flexible rod 32 slides in cooperation with the fan-shaped arc plate 18, the roller 34 rolls along the fan-shaped arc plate 18, so that the rivets 35 continuously hit the fan-shaped arc plate 18, thereby increasing the vibration frequency of the fan-shaped arc plate 18.

[0032] During operation: When drill bit 1 stops, the high-pressure water flow in water eye 2 is shut off. Due to the high water pressure at the seabed, the annular cavity 10 in rubber sleeve 6 is compressed. Blocked by annular plate 11, rubber sleeve 6 is compressed along reset groove 8, causing unblocking rod 3 to slide upward. Elliptical cavity 21 in arc-shaped rubber column 20 is compressed under water pressure. Blocked by circular plate 22, arc-shaped rubber column 20 is compressed along arc groove 17, causing second slider 23 to slide downward. This causes fan-shaped arc plate 18 to rotate around the axis. At the same time, the fan-shaped arc plates 18 on both sides are pulled by rubber spring 27. Multiple fan-shaped arc plates 18 clamp unblocking rod 3, which in turn blocks water eye 2. The fan-shaped arc plates 18 close together, pushing the striking soft rod 32 to rotate. Magnets 33 on both sides attract each other, storing the striking soft rod 32 in storage groove 31. When drill bit 1 rotates, the high-pressure water flow in water eye 2 is activated. As the high-pressure water flows through arc-shaped blade 13, it pushes cone 12 downwards, causing cone 12 to rotate. This causes unblocking rod 3 to rotate and slide downwards, leading to slider 5 sliding downwards along reset groove 8, thus stretching and resetting rubber sleeve 6. The high-pressure water flow pushes sector-shaped arc plate 18 to rotate, causing slider 23 to slide upwards, thus stretching and resetting arc-shaped rubber column 20. As slider 23 slides, the protrusions 25 on both sides contact and slide, causing slider 23 to vibrate. This vibration causes sector-shaped arc plate 18 to vibrate, and simultaneously, the high-pressure water flow... When the fan-shaped arc plate 18 is in operation, the water flow velocity increases as the water flows through the water passage 29, causing the elastic vibrating plate 30 to vibrate violently. This vibrates the fan-shaped arc plate 18. When the unblocking rod 3 rotates, the striking flexible rod 32 is subjected to centrifugal force and rotates from the receiving groove 31. This causes the striking flexible rod 32 to strike the fan-shaped arc plate 18, increasing the vibration intensity of the fan-shaped arc plate 18 and shaking off the silt on the surface of the fan-shaped arc plate 18, thus improving the cleanliness of the water hole 2. The unblocking rod 3, in conjunction with the high-pressure water flow, unblocks the water hole 2, reducing the probability of blockage in the water hole 2, decreasing the frequency of removing the drill bit 1, and improving the progress of oilfield exploitation and construction.

[0033] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0034] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine oilfield drill bit, characterized in that: It includes a drill bit (1) and a dredging structure; the drill bit (1) includes a matrix (101), a gauge material (102) and a diamond composite sheet (103); the gauge material (102) is fixedly attached to the bottom outer ring of the matrix (101), and multiple diamond composite sheets (103) are fixedly attached to the outside of the gauge material (102); multiple water holes (2) are opened inside the matrix (101), and a dredging structure is provided inside the water holes (2); The unblocking structure includes an unblocking rod (3), a support rod (4), a first slider (5), and a rubber sleeve (6); the inner wall of the water eye (2) has multiple grooves (7), the inner wall of the grooves (7) has a reset groove (8), the inside of the reset groove (8) is fixedly connected to a slider (9), the first slider (5) is slidably installed inside the reset groove (8), the inner ring of the first slider (5) is slidably engaged with the outer ring of the slider (9), the top surface of the first slider (5) is fixedly connected to a rubber sleeve (6), and the rubber sleeve (6) The top surface of the rubber sleeve (6) is fixed to the top wall of the reset groove (8), the inner wall of the rubber sleeve (6) is slidably engaged with the outer wall of the slide rod (9), multiple annular cavities (10) are opened inside the rubber sleeve (6), annular plates (11) are fixedly connected inside the annular cavities (10), support rods (4) are fixedly connected to the side of the first slider (5), the side wall of the support rod (4) is slidably engaged with the side wall of the slide groove (7), and a dredging rod (3) is provided in the middle of the multiple support rods (4), the dredging rod (3) is located in the middle of the water eye (2).

2. The offshore oilfield drill bit according to claim 1, characterized in that: The top of the unblocking rod (3) is fixed to a cone (12), and the cone (12) has multiple arc-shaped blades (13) on its arc surface. The middle of the multiple support rods (4) is fixed to a ring (14). The top outer ring of the unblocking rod (3) has an annular groove (15), and the inner ring of the ring (14) slides with the inner ring of the annular groove (15).

3. The offshore oilfield drill bit according to claim 1, characterized in that: The cross-section of the support rod (4) is streamlined, and the side with the larger streamlined diameter of the support rod (4) is consistent with the water flow direction of the water eye (2).

4. The offshore oilfield drill bit according to claim 1, characterized in that: Multiple fan-shaped grooves (16) are opened on the outer ring of the bottom of the inner wall of the water eye (2). An arc groove (17) is opened on the inner wall of the fan-shaped groove (16). Multiple fan-shaped arc plates (18) are rotatably installed on the outer ring of the bottom of the inner wall of the water eye (2). A connecting rod (19) is fixedly connected to the top of the fan-shaped arc plate (18). The connecting rod (19) slides with the fan-shaped groove (16). An arc rubber column (20) is fixedly connected to the bottom surface of the arc groove (17). Multiple elliptical cavities (21) are opened inside the arc rubber column (20). A circular plate (22) is fixedly connected inside the elliptical cavity (21). A second slider (23) is fixedly connected to the top surface of the arc rubber column (20). The second slider (23) slides with the arc groove (17). The second slider (23) is fixedly connected to the top of the connecting rod (19).

5. A marine oilfield drill bit according to claim 4, characterized in that: Multiple fan-shaped arc plates (18) form a cone shape. An arc-shaped opening (24) is opened at the bottom end of the fan-shaped arc plate (18). Multiple arc-shaped openings (24) form a circular opening. The concave surface of the arc-shaped opening (24) slides in conjunction with the outer wall of the unblocking rod (3).

6. A marine oilfield drill bit according to claim 4, characterized in that: The top outer wall of the arc groove (17) and the top wall of the second slider (23) are both fixed with multiple protrusions (25), and the protrusions (25) on both sides are slidably engaged.

7. A marine oilfield drill bit according to claim 4, characterized in that: Multiple round holes (26) are opened on both sides of the fan-shaped arc plate (18), and rubber springs (27) are fixed between the two sides opposite to the round holes (26).

8. A marine oilfield drill bit according to claim 4, characterized in that: Multiple inclined tooth plates (28) are fixed to the concave surface of the fan-shaped arc plate (18). Multiple water passage holes (29) are opened at the junction of the inclined tooth plate (28) and the fan-shaped arc plate (18). The diameter of the water inlet end of the water passage hole (29) is larger than the diameter of the water outlet end. Multiple elastic vibrating plates (30) are fixed inside the water passage hole (29).

9. A marine oilfield drill bit according to claim 4, characterized in that: The bottom outer ring of the unblocking rod (3) has multiple storage slots (31). The top of the storage slot (31) is rotatably installed with a striking soft rod (32). The end of the striking soft rod (32) slides in cooperation with the inner ring of the fan-shaped arc plate (18). The middle part of the striking soft rod (32) and the inner wall of the storage slot (31) are both provided with magnets (33). The magnets (33) on both sides attract each other.

10. A marine oilfield drill bit according to claim 9, characterized in that: The end of the striking rod (32) is rotatably mounted with a roller (34), and the outer ring of the roller (34) is fixed with a plurality of rivets (35).

Images