Well drilling rod for oil exploitation

Abstract

The invention discloses a well drilling rod for oil exploitation, and belongs to the technical field of oil exploration and exploitation. Particularly, the interior of the drill pipe is continuously cooled through evaporation liquid, the side away from a heat insulation pipe is heated and rapidly gasified into gas, the gas enters the low-temperature side through a one-way valve by means of pressure difference and flows back after being liquefied when encountering cold, heat is continuously circulated and efficiently taken away, and the overall temperature of the drill pipe is reduced. A rotating mechanism and a driving mechanism are arranged, the temperature difference between the two sides of the rotating disc is ingeniously utilized, so that a thermal expansion material in a sliding cavity stretches out and draws back, a magnetic balancing weight is driven to move, the center of gravity of the rotating disc shifts and rotates in cooperation with repulsive force and suction force of magnetic blocks on the two sides, and a transmission rod can be continuously driven to rotate without extra energy; the rotating mechanism and the driving mechanism are tightly matched, flowing of cooling water can be controlled, the cooling fins are rapidly cooled, efficient cooling is achieved, energy consumption is reduced, the service life of the drill rod is prolonged, and the drilling efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil exploration and exploitation, and particularly relates to a drilling drill pipe for oil exploitation. Background Art

[0002] A drill pipe is a steel pipe with threads at the tail, used to connect the surface equipment of a drilling rig and the drilling and grinding equipment or downhole device at the bottom of the well. The purpose of the drill pipe is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the downhole device. The drill pipe must be able to withstand huge internal and external pressures, torsion, bending, and vibration. During the exploitation and refining of oil and gas, the drill pipe can be used multiple times.

[0003] With the continuous increase in the depth and difficulty of oil exploitation, higher requirements are put forward for the heat dissipation performance of the drilling drill pipe. During the drilling process of traditional drilling drill pipes, a large amount of heat is generated by the friction between the drill bit and the formation, resulting in the easy accumulation of heat inside the drill pipe cavity and difficult external discharge. If the heat cannot be dissipated in a timely and effective manner, it will cause the drill pipe temperature to be too high, affecting the service life of the drill pipe and even leading to safety accidents. In the prior art, only heat dissipation fins are used to absorb the heat inside the drill pipe cavity, and it is obviously difficult to quickly cool the inside of the drill pipe. In addition, the heat dissipation structure of the existing drill pipe is often relatively complex, requiring additional power equipment to drive the heat dissipation components, increasing energy consumption and equipment costs. Summary of the Invention

[0004] Aiming at the defects of the prior art, the present invention provides a drilling drill pipe for oil exploitation, aiming to: continuously dissipate heat from the inside of the drill pipe through the evaporation liquid, and by setting a rotating mechanism and a driving mechanism, the transmission rod can be continuously driven to rotate without additional energy, thereby controlling the flow of cooling water and quickly cooling the heat dissipation fins to achieve efficient heat dissipation, reduce energy consumption, improve the service life and drilling efficiency of the drill pipe, so as to solve the problems proposed in the above background art.

[0005] The technical solution of a drilling drill pipe for oil exploitation of the present invention specifically includes: a drill pipe body, a connecting piece is rotatably connected to the lower end of the drill pipe body, and a drill bit body is fixedly installed at the lower end of the connecting piece; a device cavity is opened inside the drill pipe body, a heat conduction pipe is fixedly installed inside the device cavity, a heat dissipation mechanism is arranged inside the heat conduction pipe, the lower end of the heat conduction pipe extends into the connecting piece, a heat dissipation fin is rotatably installed outside the heat conduction pipe, and a crown gear is fixedly installed at the lower end of the heat dissipation fin; a circular cavity and a rectangular cavity are arranged inside the connecting piece, a driving mechanism is arranged inside the circular cavity, and a rotating mechanism is arranged inside the rectangular cavity; the driving mechanism is used to drive the heat dissipation fin to rotate, and the rotating mechanism cooperates with the driving mechanism to drive the liquid inside the device cavity to flow.

[0006] Preferably, the heat dissipation mechanism includes an annular tube opened inside the heat conduction tube. The annular tube is filled with evaporation liquid inside, and two first one-way valves are symmetrically arranged. One side of the annular tube is provided with a heat insulation tube. Cooling water passes through the heat insulation tube, and an opening communicating with the device cavity is bent at the top.

[0007] Preferably, the evaporation liquid is ethylene glycol.

[0008] Preferably, the driving mechanism includes a transmission rod rotatably installed inside the connecting piece. A turntable is fixedly installed on the transmission rod located inside the circular cavity. An arc-shaped plate is fixedly arranged inside the circular cavity. An arc-shaped groove matching the turntable and a water guide pipe communicating with the bottom of the device cavity are opened inside the arc-shaped plate; A plurality of sliding cavities are arranged on the outer wall of the turntable, and heat insulation strips are arranged between adjacent two sliding cavities. A thermal expansion material and a magnetic counterweight are arranged inside the sliding cavity.

[0009] Preferably, a first magnetic block is arranged on one side of the arc-shaped plate close to the turntable. The first magnetic block repels the counterweight with the same pole; A second magnetic block is arranged on the other side of the circular cavity. The second magnetic block attracts the counterweight with the opposite pole.

[0010] Preferably, the turntable is made of a ceramic material that does not affect magnetism and does not conduct heat. At least two columns of sliding cavities are arranged on the turntable, and the first magnetic blocks arranged corresponding to the sliding cavities on the arc-shaped plate are also arranged in two columns or multiple columns.

[0011] Preferably, the rotating mechanism includes a strip-shaped cavity opened below the rectangular cavity. One end of the transmission rod extends into the rectangular cavity and is connected with a disc. A fixed rod is arranged on the disc. A sliding rod is slidably installed at the bottom of the rectangular cavity. The sliding rod is connected with the fixed rod through an annular rod. A sliding plug is arranged at the lower end of the sliding rod and slides inside the strip-shaped cavity; Cooling water is stored inside the strip-shaped cavity, and a second one-way valve and a third one-way valve are arranged at the bottom of the strip-shaped cavity.

[0012] Preferably, the second one-way valve is communicated with the water guide pipe and a water inlet arranged on one side of the connecting piece, and the third one-way valve is communicated with the heat insulation tube and a liquid guide pipe arranged on the side wall of the drill pipe.

[0013] Preferably, a groove matching the heat dissipation fins is opened on the connecting piece. A transmission gear fixedly connected with the transmission rod is arranged inside the groove. The transmission gear meshes with a crown gear.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The present invention dissipates heat through the gas-liquid circulation of the evaporative liquid, which can efficiently remove the heat generated by the drill bit body. When the drill bit and the formation rub against each other to generate a large amount of heat, the heat is transferred to the heat conduction pipe. The evaporative liquid is heated in the annular pipe, away from the insulation pipe, and quickly vaporizes into gas. With the help of the pressure difference, it enters the low-temperature side through the one-way valve, liquefies when cooled, and then flows back. The continuous circulation efficiently removes heat, reduces the overall temperature of the drill pipe, and effectively extends the service life of the drill pipe.

[0016] 2. The drive mechanism of the present invention cleverly utilizes the temperature difference on both sides of the turntable. The cooling water in the water pipe inside the arc plate creates a temperature difference on both sides of the turntable, causing the thermal expansion material in the sliding cavity to expand and contract, driving the magnetic counterweight to move. Combined with the repulsive and attractive forces of the magnetic blocks on both sides, the center of gravity of the turntable is offset and rotated, thereby driving the transmission rod to operate. The entire process does not require additional energy, reducing energy consumption and maintenance costs.

[0017] 3. The present invention's rotation mechanism and drive mechanism work seamlessly together. The rotation of the transmission rod drives the disc, fixed rod, and other components, causing the slide rod and slide plug to operate the one-way valve. Cooling water cools the radiator fins while also promoting heat dissipation circulation within the annular tube. Simultaneously, the meshing of the transmission gear and crown gear drives the radiator fins, ensuring more uniform heat dissipation, comprehensively improving heat dissipation efficiency, and ensuring stable operation of the drill pipe during drilling operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a drilling rod for oil production according to the present invention;

[0019] Figure 2 is an internal cross-sectional view of the drill pipe of the present invention;

[0020] Figure 3 Schematic diagram of the internal structure of the drill pipe of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the transmission gear of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure inside the circular cavity of the present invention;

[0023] Figure 6 This is an enlarged view of the structure of A of the present invention;

[0024] Figure 7 This is an enlarged view of the structure at B of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure inside the rectangular cavity of the present invention;

[0026] Figure 9 Schematic cross-sectional view of the curved plate of the present invention.

[0027] In the figure: 1, drill pipe; 2, connecting piece; 3, drill bit body; 4, device cavity; 5, heat conduction pipe; 6, annular pipe; 7, evaporation liquid; 8, first one-way valve; 9, heat insulation pipe; 10, heat dissipation fins; 11, crown gear; 12, transmission gear; 13, transmission rod; 14, circular cavity; 15, turntable; 16, arc plate; 17, water guide pipe; 18, sliding cavity; 19, thermal expansion material; 20, counterweight; 21, water inlet; 22, rectangular cavity; 23, disc; 24, fixing rod; 25, sliding rod; 26, strip cavity; 27, sliding plug; 28, second one-way valve; 29, liquid guide pipe; 30, third one-way valve; 31, first magnetic block; 32, second magnetic block. Detailed implementation manner

[0028] 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 creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-9 , a drilling drill pipe for oil exploitation of the present invention includes a drill pipe 1. The lower end of the drill pipe 1 is rotatably connected to a connecting piece 2. The lower end of the connecting piece 2 is fixedly installed with a drill bit body 3. An apparatus cavity 4 is further opened inside the drill pipe 1. A heat conduction pipe 5 is fixedly installed inside the apparatus cavity 4. The lower end of the heat conduction pipe 5 extends into the connecting piece 2. A heat dissipation fin 10 is rotatably installed outside the heat conduction pipe 5. The lower end of the heat dissipation fin 10 is fixedly installed with a crown gear 11. A heat dissipation mechanism for cooperating with the heat dissipation fin 10 and used for dissipating heat from the drill bit body 3 is arranged inside the heat conduction pipe 5. A circular cavity 14 is opened inside the connecting piece 2. A driving mechanism for driving the heat dissipation fin 10 to rotate is arranged inside the circular cavity 14. A rectangular cavity 22 is further opened inside the connecting piece 2. A rotating mechanism for cooperating with the driving mechanism and used for driving the liquid inside the apparatus cavity 4 to flow is arranged inside the rectangular cavity 22.

[0030] As an implementation manner of the present invention, please refer to Figure 2 , the heat dissipation mechanism includes an annular pipe 6 opened inside the heat conduction pipe 5, which is filled with evaporation liquid 7 inside, and two first one-way valves 8 are symmetrically arranged. One side of the annular pipe 6 is provided with a heat insulation pipe 9. The heat insulation pipe 9 is filled with cooling water and is bent at the top and provided with an opening communicating with the apparatus cavity 4.

[0031] When drilling work is carried out, the heat at the drill bit body 3 will be quickly transferred to the heat conduction tube 5 inside the connecting piece 2. Due to the setting of the heat insulation tube 9, the annular tube 6 inside the heat conduction tube 5 will be partially heated. The evaporation liquid 7 uses ethylene glycol. The evaporation liquid 7 on the side of the annular tube 6 away from the heat insulation tube 9 will be heated first and vaporized into gas. The gas moves upward and enters the other side of the annular tube 6 through the first one-way valve 8 at the upper end. Since the temperature on the side of the annular tube 6 sleeving the heat insulation tube 9 is relatively low, the vaporized evaporation liquid 7 will release heat and liquefy, and then flow downward, and then flow back to the side of the annular tube 6 away from the heat insulation tube 9 through the first one-way valve 8 at the lower end, completing a heat dissipation cycle, and then continuously cooling the inside of the drill pipe 1. At the same time, the evaporation liquid 7 evaporates and absorbs heat to become gas, and the volume increases. Taking this as the driving force, it can continuously push the liquefied evaporation liquid 7 to flow.

[0032] Through the heat dissipation method of the gas-liquid cycle of the evaporation liquid 7, the heat dissipation mechanism can efficiently and quickly take away a large amount of heat generated by the drill bit body 3, greatly alleviating the problem of the decline in the performance of the drill pipe material caused by high temperature, effectively extending the service life of the drill pipe, significantly reducing the frequency of replacing the drill pipe, and reducing the cost and time loss of drilling operations.

[0033] As an implementation manner of the present invention, the driving mechanism includes a transmission rod 13 rotatably installed inside the connecting piece 2. A turntable 15 is fixedly installed on the transmission rod 13 located inside the circular cavity 14. An arc-shaped plate 16 for dissipating heat from one side of the turntable 15 is also fixedly provided inside the circular cavity 14. An arc-shaped groove matching the turntable 15 is opened inside the arc-shaped plate 16. A water guide pipe 17 is provided inside the arc-shaped plate 16. The upper end of the water guide pipe 17 is communicated with the bottom of the device cavity 4 for cooling water to flow through; a plurality of sliding cavities 18 are equidistantly opened on the outer wall of the turntable 15. The sliding cavities 18 are linearly arranged along the circumferential direction, and heat insulation strips are provided between two adjacent sliding cavities 18. A thermal expansion material 19 is fixedly connected inside each sliding cavity 18. One end of the thermal expansion material 19 close to the opening of the sliding cavity 18 is fixedly connected with a counterweight 20. A magnetic material is added inside the counterweight 20, that is, the counterweight 20 has magnetism; a first magnetic block 31 is fixedly provided on the side of the arc-shaped plate 16 close to the turntable 15. The side surface of the first magnetic block 31 opposite to the counterweight 20 has the same magnetic pole, and has a force of like poles repelling each other; a second magnetic block is fixedly provided on the side of the circular cavity 14 away from the arc-shaped plate 16. The side surface of the second magnetic block opposite to the counterweight 20 has an opposite magnetic pole, and has a force of opposite poles attracting each other.

[0034] Furthermore, the cross-section of the counterweight 20 is smaller than the opening size of the sliding cavity 18, and the two are not hermetically connected; in order to facilitate the air circulation in the sliding cavity 18 when the thermal expansion material 19 expands and contracts and avoid being affected by air pressure, the side surface of the counterweight 20 close to the sliding cavity 18 can be set to be wavy.

[0035] Furthermore, the turntable 15 is made of a ceramic material that does not affect magnetism and does not conduct heat. And to increase the rotational potential energy of the turntable 15, at least two columns of sliding cavities 18 are provided on the turntable 15, and the first magnetic blocks 31 correspondingly arranged on the arc-shaped plate 16 with respect to the sliding cavities 18 are also arranged in two columns or multiple columns.

[0036] During the drilling operation, since the cooling water is contained in the water conduit 17 inside the arc-shaped plate 16, there will be a temperature difference on both sides of the turntable 15 after the connecting piece 2 transfers the heat to the inside of the circular cavity 14; the temperature inside the sliding cavity 18 on the side of the turntable 15 close to the arc-shaped plate 16 is low, and its thermal expansion material 19 is in a tightened state; the temperature inside the sliding cavity 18 on the side of the turntable 15 away from the arc-shaped plate 16 is high, and its thermal expansion material 19 expands due to heat and elongates along the length of the sliding cavity 18, thereby pushing the counterweight 20 to move outwards; at this time, the center of gravity of the turntable 15 shifts and rotates, and then drives the transmission rod 13 to rotate;

[0037] When the turntable 15 rotates to the side close to the arc-shaped plate 16, it will no longer be heated, and the flowing water in the water conduit 17 will cool it down, causing the thermal expansion material 19 to cool down and drive the counterweight 20 to reset. At the same time, because the magnetic poles of the opposite sides of the first magnetic block 31 on the arc-shaped plate 16 and the counterweight 20 are the same, that is, the first magnetic block 31 generates a repulsive force on the counterweight 20, which further promotes the reset of the counterweight 20. When the turntable 15 rotates to the area away from the arc-shaped plate 16, the thermal expansion material 19 will be heated again and drive the counterweight 20 to move, so that the center of gravity of the turntable 15 always deviates to the side away from the arc-shaped plate 16; at the same time, because the magnetic poles of the opposite sides of the second magnetic block and the counterweight 20 are opposite, that is, the second magnetic block generates an attractive force on the counterweight 20, which further promotes the counterweight 20 to move outwards.

[0038] The setting of the heat insulation strip can make the heat transfer only to the inside of the sliding cavity 18, thereby making the temperature difference change on both sides of the turntable 15 larger, effectively enhancing the change amount of the center of gravity, and further enhancing the rotational force of the turntable 15, continuously driving the transmission rod 13 to rotate without the need for additional energy. The driving mechanism cleverly utilizes the temperature difference on both sides of the turntable 15 to achieve rotation without the need to connect to external energy additionally. Compared with the traditional method relying on electric or hydraulic drive, it reduces complex power transmission components and the maintenance cost also drops significantly; in addition, its design using the interaction of the thermal expansion material 19 and the magnetic block makes the rotation of the turntable 15 stable and continuous, providing a reliable guarantee for the stable operation of the subsequent rotating mechanism, and greatly improving the operation stability and economy of the entire drill pipe system.

[0039] As an implementation manner of the present invention, please refer to Figure 2 and Figure 8, the rotating mechanism includes a strip-shaped cavity 26 opened below the rectangular cavity 22. One end of the transmission rod 13 extends into the interior of the rectangular cavity 22 and is fixedly connected to a disc 23. One side of the disc 23 is fixedly connected to a fixed rod 24. A slide rod 25 is slidably installed at the bottom of the rectangular cavity 22. The upper end of the slide rod 25 is fixedly connected to an annular rod. The annular rod is sleeved outside the fixed rod 24. The lower end of the slide rod 25 is provided with a slide plug 27 that extends into the strip-shaped cavity 26 and slides in a sealed manner. The bottom of the strip-shaped cavity 26 is symmetrically provided with a second one-way valve 28 and a third one-way valve 30; a liquid guide pipe 29 is fixedly installed on the side wall of the drill pipe 1. The side wall of the connecting member 2 is also provided with a water inlet 21 for introducing cooling water into the strip-shaped cavity 26; a filter screen is provided inside the water inlet 21; the second one-way valve 28 is communicated with the water inlet 21 and the water guide pipe 17, and only allows liquid to enter the interior of the strip-shaped cavity 26 from the water inlet 21 and the water guide pipe 17; the third one-way valve 30 is communicated with the liquid guide pipe 29 and the heat insulation pipe 9, and only allows liquid to enter the liquid guide pipe 29 and the heat insulation pipe 9 from the strip-shaped cavity 26 respectively.

[0040] When drilling work is carried out, when the transmission rod 13 rotates, it will drive the disc 23 and the fixed rod 24 inside the rectangular cavity 22 to rotate. Subsequently, the fixed rod 24 will drive the slide rod 25 and the slide plug 27 to move up and down along the strip-shaped cavity 26 through the annular rod, thereby controlling the cooperation of the second one-way valve 28 and the third one-way valve 30; when the slide plug 27 moves up, the second one-way valve 28 conducts water. While the cooling water at the water inlet 21 is pumped into the interior of the strip-shaped cavity 26, the water in the device cavity 4 also passes through the water guide pipe 17 and is pumped into the interior of the strip-shaped cavity 26 and mixed with the cooling water; the cooling water flowing through the water guide pipe 17 cools the arc-shaped plate 16, thereby maintaining the temperature difference on both sides of the turntable 15.

[0041] When the slide plug 27 moves down, the third one-way valve 30 conducts water. At this time, a part of the cooling water inside the strip-shaped cavity 26 is sprayed onto the surface of the heat dissipation fins 10 in the device cavity 4 through the liquid guide pipe 29 to quickly cool the heat dissipation fins 10; the other part of the cooling water flows through the heat insulation pipe 9 and flows into the device cavity 4 from the opening at the top of the heat insulation pipe 9 to cool and insulate one side of the annular pipe 6 and promote the formation of a heat dissipation cycle of the evaporation liquid 7 inside. The rotating mechanism and the driving mechanism are closely matched, producing good synergistic technical effects.

[0042] By controlling the operation of the second one-way valve 28 and the third one-way valve 30, the flow direction and distribution of the cooling water are precisely adjusted. On the one hand, the cooling water cools the heat dissipation fins 10, significantly improving the heat dissipation efficiency of the heat dissipation fins 10; on the other hand, it promotes the heat dissipation cycle of the evaporation liquid 7 in the annular pipe 6, further enhancing the overall heat dissipation capacity. The meshing rotation of the transmission gear 12 and the crown gear 11 enables the heat dissipation fins 10 to dissipate heat evenly in all directions, effectively ensuring that the drill pipe can operate stably during drilling operations, reducing the probability of failures caused by overheating, and ensuring the efficient and safe progress of drilling work.

[0043] Furthermore, the connecting member 2 is also provided with a groove adapted to the heat dissipation fins 10. A transmission gear 12 fixedly connected to the transmission rod 13 is arranged in the groove. The transmission gear 12 meshes with the crown gear 11 and drives the heat dissipation fins 10 fixedly connected to the crown gear 11 to rotate. Specifically, the transmission rod 13 drives the transmission gear 12 to rotate. The transmission gear 12 meshes with the crown gear 11 at the lower end of the heat dissipation fins 10, thereby driving the heat dissipation fins 10 to rotate, so that the liquid sprayed by the liquid guide pipe 29 can uniformly dissipate heat from the entire heat dissipation fins 10, thereby improving the heat dissipation efficiency.

[0044] Working principle: When the drilling drill pipe is performing drilling work, a large amount of heat will be generated due to the friction between the drill bit body 3 and formation materials such as rocks; these heats are quickly transferred to the connecting member 2, and then transferred to the heat conduction pipe 5 inside the drill pipe 1. Due to the arrangement of the heat insulation pipe 9, the annular pipe 6 inside the heat conduction pipe 5 will be partially heated. The evaporation liquid 7 on the side of the annular pipe 6 away from the heat insulation pipe 9 will be heated first and vaporized into a gas. The gas moves upward and enters the other side of the annular pipe 6 through the first one-way valve 8 at the upper end. Since the temperature of the side of the annular pipe 6 sleeving the heat insulation pipe 9 is relatively low, the vaporized evaporation liquid 7 will release heat and liquefy, and flow downward, and then flow back to the side of the annular pipe 6 away from the heat insulation pipe 9 through the first one-way valve 8 at the lower end, completing a heat dissipation cycle, thereby continuously dissipating heat and cooling the inside of the drill pipe 1.

[0045] At the same time, the evaporation liquid 7 evaporates and absorbs heat to become a gas, and its volume increases. Taking this as the driving force, the liquefied evaporation liquid 7 can be continuously pushed to flow. When performing drilling work, since the cooling water is contained in the water guide pipe 17 inside the arc-shaped plate 16, after the connecting member 2 transfers the heat to the inside of the circular cavity 14, there will be a temperature difference on both sides of the turntable 15; when the turntable 15 rotates to the side close to the arc-shaped plate 16, it will no longer be heated, and the water flowing in the water guide pipe 17 will cool it, so that the thermal expansion material 19 cools down and drives the counterweight 20 to reset. At the same time, because the magnetic poles of the opposite sides of the first magnetic block 31 on the arc-shaped plate 16 and the counterweight 20 are the same, that is, the first magnetic block 31 generates a repulsive force on the counterweight 20, further pushing the counterweight 20 to reset.

[0046] When the turntable 15 rotates to the area away from the arc-shaped plate 16, the thermal expansion material 19 will be heated again and drive the counterweight 20 to move, so that the center of gravity of the turntable 15 always deviates to the side away from the arc-shaped plate 16; at the same time, because the magnetic poles of the opposite sides of the second magnetic block and the counterweight 20 are opposite, that is, the second magnetic block generates an attractive force on the counterweight 20, further pushing the counterweight 20 to move outwards. The setting of the heat insulation strip can make the heat only transfer to the inside of the sliding cavity 18, thereby making the temperature difference between the two sides of the turntable 15 change greatly, effectively enhancing the change amount of the center of gravity, and further enhancing the rotation force of the turntable 15, continuously driving the transmission rod 13 to rotate, without the need for additional energy.

[0047] When the transmission rod 13 rotates, it will drive the disc 23 and the fixed rod 24 inside the rectangular cavity 22 to rotate. Subsequently, the fixed rod 24 will drive the slide rod 25 and the slide plug 27 to move up and down along the strip cavity 26 through the annular rod, thereby controlling the cooperation of the second one-way valve 28 and the third one-way valve 30; when the slide plug 27 moves upward, the second one-way valve 28 conducts water, and the cooling water at the water inlet 21 is pumped into the strip cavity 26. At the same time, the water in the device cavity 4 is also pumped into the strip cavity 26 through the water guide pipe 17 and is neutralized with the cooling water.

[0048] The cooling water flowing through the water guide pipe 17 will cool the arc-shaped plate 16, thereby maintaining the temperature difference on both sides of the turntable 15; when the slide plug 27 moves downward, the third one-way valve 30 conducts water. At this time, a part of the cooling water in the strip cavity 26 is sprayed onto the surface of the heat dissipation fins 10 in the device cavity 4 through the liquid guide pipe 29 to quickly cool the heat dissipation fins 10; another part of the cooling water flows through the heat insulation pipe 9 and flows into the device cavity 4 from the opening at the top of the heat insulation pipe 9 to cool and insulate one side of the annular pipe 6 and promote the formation of a heat dissipation cycle of the internal evaporation liquid 7. In addition, the transmission rod 13 drives the transmission gear 12 to rotate, and the transmission gear 12 meshes with the crown gear 11 at the lower end of the heat dissipation fins 10, thereby driving the heat dissipation fins 10 to rotate, so that the liquid sprayed by the liquid guide pipe 29 can uniformly dissipate heat from the entire heat dissipation fins 10, thereby improving the heat dissipation efficiency.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling drill pipe for oil exploitation, characterized in that: It includes a drill pipe (1), a connecting piece (2) is rotatably connected to the lower end of the drill pipe (1), and a drill bit body (3) is fixedly installed at the lower end of the connecting piece (2); a device cavity (4) is formed inside the drill pipe (1), a heat conduction pipe (5) is fixedly installed in the device cavity (4), a heat dissipation mechanism is arranged inside the heat conduction pipe (5), the lower end of the heat conduction pipe (5) extends into the connecting piece (2), a heat dissipation fin (10) is rotatably installed outside the heat conduction pipe (5), and a crown gear (11) is fixedly installed at the lower end of the heat dissipation fin (10); a circular cavity (14) and a rectangular cavity (22) are arranged inside the connecting piece (2), a driving mechanism is arranged in the circular cavity (14), and a rotating mechanism is arranged in the rectangular cavity (22); the driving mechanism is used to drive the heat dissipation fin (10) to rotate, and the rotating mechanism cooperates with the driving mechanism to drive the liquid inside the device cavity (4) to flow.

2. A drilling drill pipe for oil extraction according to claim 1, characterized in that: The heat dissipation mechanism includes an annular pipe (6) formed inside the heat conduction pipe (5), an evaporation liquid (7) is encapsulated inside the annular pipe (6), and two first one-way valves (8) are symmetrically arranged. An insulating pipe (9) is installed on one side of the annular pipe (6), cooling water passes through the insulating pipe (9), and an opening communicating with the device cavity (4) is arranged at the bent top.

3. A drilling drill pipe for oil exploitation according to claim 2, characterized in that: The evaporation liquid (7) is ethylene glycol.

4. A drilling drill pipe for oil extraction according to claim 2, characterized in that: The driving mechanism includes a transmission rod (13) rotatably installed inside the connecting piece (2). A turntable (15) is fixedly installed on the transmission rod (13) located inside the circular cavity (14). An arc-shaped plate (16) is fixedly arranged inside the circular cavity (14). An arc-shaped groove matching with the turntable (15) and a water guide pipe (17) communicating with the bottom of the device cavity (4) are formed inside the arc-shaped plate (16); a plurality of sliding cavities (18) are arranged on the outer wall of the turntable (15), heat insulation strips are arranged between adjacent two sliding cavities (18), and a thermal expansion material (19) and a magnetic counterweight (20) are arranged inside the sliding cavity (18).

5. A drilling drill pipe for oil exploitation according to claim 4, characterized in that: A first magnetic block (31) is arranged on one side of the arc-shaped plate (16) close to the turntable. The first magnetic block (31) and the counterweight (20) repel each other with the same pole; a second magnetic block (32) is arranged on the other side of the circular cavity (14), and the second magnetic block (32) and the counterweight (20) attract each other with different poles.

6. A drilling drill pipe for oil extraction according to claim 5, characterized in that: The turntable (15) is made of a ceramic material that does not affect magnetism and does not conduct heat. At least two columns of sliding cavities (18) are arranged on the turntable (15), and the first magnetic blocks (31) arranged corresponding to the sliding cavities (18) on the arc-shaped plate (16) are also arranged in two columns or multiple columns.

7. A drilling drill pipe for oil exploitation according to claim 4, characterized in that: The rotating mechanism includes a strip-shaped cavity (26) opened below the rectangular cavity (22). One end of the transmission rod (13) extends into the rectangular cavity (22) and is connected with a disc (23). A fixed rod (24) is arranged on the disc (23). A sliding rod (25) is slidably installed at the bottom of the rectangular cavity (22). The sliding rod (25) is connected with the fixed rod (24) through an annular rod. A sliding plug (27) is arranged at the lower end of the sliding rod (25) and slides in the strip-shaped cavity (26). Cooling water is stored in the strip-shaped cavity (26), and a second one-way valve (28) and a third one-way valve (30) are arranged at the bottom thereof.

8. A drilling drill pipe for oil exploitation according to claim 7, characterized in that: The second one-way valve (28) is communicated with the water guide pipe (17) and a water inlet (21) arranged on one side of the connecting piece. The third one-way valve (30) is communicated with the heat insulation pipe (9) and a liquid guide pipe (29) arranged on the side wall of the drill pipe (1).

9. A drilling drill pipe for oil exploitation according to claim 4, characterized in that: A groove matched with the heat dissipation fins (10) is opened on the connecting piece (2). A transmission gear (12) fixedly connected with the transmission rod (13) is arranged in the groove. The transmission gear (12) is meshed with a crown gear (11).

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